Operator List

Operators: 5836

Operator Count   Operator Count   Operator Count   Operator Count  
234   AMARILLO 5   ASAMERA 10   BARRANCA 1  
5-D OPERATING 2   AMAX 26   ASCENT 11   BARRETT 4  
A & A 3   AMBASSADOR 20   ASHER 2   BARRIER 7  
A & D 1   AMBERTON 4   ASHFORD 15   BARRY 28  
A & D EXPL 5   AMBROSIA MINERALS 1   ASHLAND 31   BARTELS 1  
A & M 2   AMCOLE 2   ASHLEY 1   BARTESSA 1  
A & R 2   AMEND 7   ASHTOLA 6   BARTGIS 1  
A & T 15   AMERADA 284   ASPECT 6   BARTH 1  
A A A OPERATING 5   AMERICAN AUSTRALIAN 1   ASPEN 2   BARTHOLOMEW 1  
A C R 1   AMERICAN COASTAL 4   ASSOCIATED OIL 99   BARTLE 3  
A K M 2   AMERICAN COMETRA 39   ASTIN 1   BARTLE & BARTLE 1  
A M & R 3   AMERICAN DELTA 9   ASTRO 4   BARTLETT 2  
A N R 8   AMERICAN DRILLING 7   ATAPCO 22   BASA RESOURCES 5  
A O E OPERATORS 2   AMERICAN ENERGY 17   ATASCA RESOURCES 2   BASELINE O & G 1  
A O P 9   AMERICAN EXPLORATION 17   ATASCO 10   BASIC EARTH SCIENCE 14  
A P D 9   AMERICAN FIRST ENERGY 1   ATASCOSA OIL & GAS 1   BASIC ENERGY 4  
A P I 2   AMERICAN HUNTER 1   ATASCOSA TRUST 1   BASIN 13  
A R P 1   AMERICAN INTERNATIONAL 19   ATCHISON 3   BASOM 3  
A W P 12   AMERICAN LIBERTY 36   ATHENS 2   BASS 175  
A.T.O.P.P. 1   AMERICAN NATURAL GAS 22   ATKINS & O'NEIL 4   BASTROP 4  
ABACO 12   AMERICAN OPERATING 1   ATKINS MINERALS 2   BATEMAN 9  
ABBEVILLE 1   AMERICAN PETROFINA 136   ATKINSON 18   BATES 4  
ABBOTT 10   AMERICAN PETROLEUM 1   ATLANTIC 961   BATEX 3  
ABCO 12   AMERICAN PLASTI-PLATE 1   ATLAS 4   BATON 4  
ABEL 31   AMERICAN PUBLIC ENERGY 4   ATOKA 1   BATTAILE & KNISELY 1  
ABER 2   AMERICAN QUASAR 12   ATTEBURY 2   BAUCHMAN 2  
ABERCROMBIE 100   AMERICAN REPUBLIC 31   ATWOOD 20   BAUGH 1  
ABERNATHY 1   AMERICAN SHORELINE 53   AUBURN 9   BAUMAN 3  
ABRAHAM 1   AMERICAN STANDARD 2   AUDAS 5   BAXTER 108  
ABRAXAS 100   AMERICAN TEXAS 5   AUGUST 1   BAY CITY DRILLING 11  
ABSHER 3   AMERICAN TRADING 18   AUGUSTA 1   BAY CITY REFINING 4  
ABSHIER 1   AMERICO 4   AULD 20   BAY OIL 9  
AC EXPLORATION 3   AMERICUS 1   AURORA 11   BAY PRODUCTION 3  
ACCO 90   AMERITEX 1   AUSTEX 1   BAY ROCK 78  
ACCUMULATIVE ROYALTY 2   AMES 4   AUSTIN 24   BAYNES 10  
ACHE 1   AMEX SYSTEMS 1   AUSTRA-TEX 7   BAYPORT 4  
ACHNING 7   AMHERST 1   AUSTRAL 93   BAYRIDGE 1  
ACIETEROS 5   AMIGO 2   AUTREY 1   BAYSIDE 20  
ACME 3   AMIGOS 1   AUTUMN 1   BAYSTAR 1  
ACOCK 49   AMINEX USA 1   AV-TECH 1   BAYTEX OIL 32  
ACOCK/ANAQUA 34   AMINI 1   AVALANCHE 3   BEACH 16  
ACOMA 4   AMINOIL 28   AVERILL 48   BEACHAM 1  
ACORN 4   AMISTAD 2   AVERY 7   BEACON 15  
ADA 72   AMMAN & McNAB 2   AWOEB 3   BEADLE 1  
ADAIR 2   AMMCO 3   AXEM 6   BEALL 3  
ADAMS 62   AMMEX 15   AXIS 1   BEAMAN 5  
ADCO 3   AMMONITE 4   AYERS 3   BEAMON 6  
ADCOCK 1   AMOCO 316   AYERS & SWOPE 1   BEARD 15  
ADDINGTON 3   AMOY 10   AYRES 13   BEASLEY 1  
ADELANTE 1   AMPAK 34   AZALEA 2   BEATY 1  
ADELON 2   AMPECO 2   AZAR 1   BEAUCHAMP 2  
ADENA 2   AMPHION 1   AZMUTH 1   BECHTEL 1  
ADKINS 1   AMPOLEX 1   AZTEC 14   BECK 15  
ADMIRAL 2   AMSLER 9   AZUL 6   BECKER 32  
ADOBE 26   AMUREX 1   B & B 11   BECKHAM 2  
ADRIAN 1   ANADARKO 48   B & D 1   BECKMAN 8  
AEGEAN 7   ANAQUA 59   B & E 1   BECO 2  
AEGIS 2   ANCIENT SEAS 1   B & G 6   BEDWELL 16  
AEOX-ST 2   ANCIRA 1   B & K 1   BEER 26  
AERO COLOMA 1   ANCON OIL 11   B & L 2   BEGEMAN 9  
AFROMA 53   ANDERMAN 6   B & M 20   BEHEMOTH 4  
AGCO 4   ANDERSON 160   B & S 1   BEHRING 1  
AGOIL 34   ANDERSON-PRICHARD 35   B & W 1   BEL OIL 7  
AGSCO 6   ANDOVER 7   B B L 3   BEL-POTA 3  
AHERN 20   ANDRADE 34   B B M 16   BELAIRE 1  
AID 12   ANDRAU 4   B D K 112   BELCHER 4  
AIKMAN 13   ANDRAU-HADA 1   B D PRODUCTION 31   BELCO 64  
AKIN 3   ANDREEN 2   B D R 3   BELGAM 8  
AKRON 6   ANDRES 2   B G EXPLORATION 1   BELL 25  
ALABAMA MINERALS 1   ANDRESS 38   B H P 29   BELL & DANSFIELL 21  
ALABLANCA 1   ANDREWS 88   B H P PETROLEUM 1   BELL, JAY 1  
ALADDIN 2   ANDRUS 9   B J B 15   BELL, KELLY 64  
ALAMO 42   ANGEL LAND 2   B J OIL MANAGEMENT 1   BELLOWS 2  
ALANCO 2   ANGELINA 3   B M W RESOURCES 2   BELLWETHER 3  
ALANIZ 5   ANGLO PRODUCTION 2   B N P 39   BELMONT 1  
ALASKA STEAMSHIP 129   ANGLO-DUTCH 1   B P AMERICA 14   BENEDUM 11  
ALASKA TEX 3   ANGLO-NATIONAL 2   B P L 1   BENEDUM-TREES 43  
ALBRECHT 4   ANHUR 5   B P PRODUCTION 5   BENGAIL 3  
ALBRIGHT 2   ANISMAN 2   B S E PRODUCTION 5   BENGE 1  
ALCO DRILLING 16   ANKENMAN 4   B T 6   BENHAM 1  
ALCO OIL 11   ANN 1   B T A OIL 31   BENNETT 35  
ALCOA 88   ANSCHUTZ 52   B W A B 1   BENNETT, MILLS 154  
ALCOR 2   ANSELMA 1   B Y S INC. 1   BENSON 13  
ALCORN 16   ANSTER 1   B-G OPERATING 1   BENTEX 6  
ALECO 1   ANTARA 1   BABB 1   BENTON 1  
ALEXANDER 8   ANTARES 28   BACARISSE 1   BENTSEN 72  
ALFORD 6   ANTEX 2   BAGDAD 3   BENZ 7  
ALGORD 1   ANTLER 2   BAGNALL 1   BENZ-STODDARD 5  
ALICE 2   APACHE 139   BAHIA 30   BENZAQUIN 1  
ALICE OIL 1   APCO 2   BAILEY 38   BEPCO 2  
ALKEK 45   APEX ENERGY 22   BAINBRIDGE 2   BERENERGY 10  
ALL AM 5   APEX OIL 4   BAKER 22   BERG 1  
ALLAUN 1   APEXCO 5   BAKKE 29   BERGMAN 37  
ALLBRIGHT 1   APOLLO 5   BALBOA 2   BERING 32  
ALLDAY 24   APPELL 247   BALD 2   BERKLEY 2  
ALLEGRO 73   APPLE 1   BALDRIDGE 163   BERKSHIRE 1  
ALLEN 116   APPLIED THERMAL 2   BALLANFONTE 3   BERLY 1  
ALLEN & MORRIS 5   APPLING 1   BALLARD 46   BERNARD 1  
ALLEN & SHUMATE 5   AQUILA 6   BALLENGEE 1   BERRY 3  
ALLERKAMP 10   AQUITAINE 1   BALTIC 20   BERTELSON 1  
ALLIANCE 7   ARANSAS 9   BAM 2   BERTMAN 1  
ALLIED DRILLING 6   ARAPAHO 1   BAMM 1   BEST 1  
ALLIED HYDROCARBONS 2   ARAXAS 3   BAMMERT 1   BETA 1  
ALLIED OIL 2   ARCADIA 10   BANCROFT 2   BETTIS 70  
ALLIED PRODUCTION 10   ARCHER 6   BANDER 1   BEVERS 1  
ALLISON 7   ARCO 354   BANDERA 2   BEVLY 31  
ALLTEX 2   ARENA 20   BANKHEAD 17   BEXCO 19  
ALMAC 8   ARENDALE & LOWE 3   BANKLINE 7   BID-RICH 1  
ALMAR 3   ARGO 282   BANKS MILLER 3   BIG 6 DRILLING 47  
ALPHA ENERGY 1   ARGOS 4   BANNER 2   BIG CHIEF 2  
ALPHA EXPLORATION 7   ARGUS 3   BANNON 2   BIG LAKE 5  
ALPHA GAS 8   ARGYLE 1   BAR D 3   BIG SHELL 3  
ALPHA OIL 2   ARICK 1   BAR M 18   BIG SPRINGS 6  
ALPHA OMEGA ENERGY 4   ARIES 1   BAR MAR 2   BIGHART 2  
ALPHA PRODUCTION 1   ARK 15   BAR S 1   BIGHORN 1  
ALSABROOK 2   ARKANSAS FUEL 252   BAR-MAC 1   BIGLANE 2  
ALSAN 2   ARKLA 7   BAR-MAR 1   BILBO 14  
ALTA 1   ARLEDGE 11   BARBARA 16   BILLFISCH 4  
ALTA ENERGY 2   ARMADA 4   BARBEE 6   BILLINGS 9  
ALTA MESA 6   ARMER 1   BARBER 12   BINNEY 1  
ALTA VISTA 13   ARMOUR 40   BARBRE 1   BINTLIFF 13  
ALTEX 2   ARMOUR-RICHARDS 1   BARGE 1   BIRD 1  
ALTGELT 1   ARMSTRONG 100   BARGO ENERGY 1   BIRDWELL 59  
ALUMINUM CO. OF AMERICA 175   ARMSTRONG & HORN 11   BARIA 18   BISCO 1  
ALWORTH 1   ARMSTRONG & SUTTON 19   BARKER 4   BISHOP 42  
ALYANA 1   ARNOLD 26   BARNEBURG 10   BISKAMP 2  
ALYNDSON 2   ARNOLD WELL SERVICE 95   BARNES 20   BISSETT 1  
AM-RDC 1   ARRIBA 46   BARNETT 4   BITTNER 1  
AM-TEX 2   ARRINGTON 2   BARNHART 8   BLACK 37  
AMAL 2   ARROW 31   BARNHILL 7   BLACK GOLD 2  
AMALGAMATED 7   ARROWHEAD 2   BARNSDALL 220    
AMAR 5   ARROYO 1   BARNWELL 6    
AMARCO 1   ARSHT 1   BARON 5    
AMAREX 1   ARTZBERGER 1   BARRACUDA 1    
Operator Count   Operator Count   Operator Count   Operator Count  
BLACK RIVER 4   BRILL 10   CAGE 8   CHAMPLIN 381  
BLACK ROCK 9   BRINKERHOFF 8   CAIN 26   CHANCE 3  
BLACKBRUSH 1   BRINKOETER 3   CAL MON 1   CHANDLER 2  
BLACKFOOT 1   BRISCOE 22   CAL-TEX 3   CHANOCO 29  
BLACKJACK 7   BRISTOL 3   CALADONIA 1   CHAPARRAL 27  
BLACKMAR 2   BRISTON 1   CALAME 1   CHAPARROSA 27  
BLACKWELL 1   BRISTOW 15   CALATEXIA 1   CHAPCO 1  
BLAFFER 5   BRITANCO 1   CALAWAY 16   CHAPMAN 139  
BLAIR 25   BRITISH AMERICAN 62   CALCO 2   CHARLTON 10  
BLAIR-VREELAND 193   BRITISH TEXAN 8   CALDWELL 8   CHARO ENERGY 10  
BLAIRSVILLE 2   BRITTANY 1   CALHOUN 2   CHARRO 30  
BLAKE ENERGY 9   BROAD OAK 1   CALIBOGUE 2   CHARTER 2  
BLALOCK 2   BROADHEAD 1   CALIBRI 1   CHASE 8  
BLANCHARD 21   BROADUS 6   CALIFORNIA CO. 12   CHASS 25  
BLANCO 215   BROADWAY 1   CALIFORNIA TIME 1   CHASTAIN 1  
BLANKE 1   BROCATO 9   CALIFORNIA TIMES 3   CHAVANNE 24  
BLANTON 6   BROCK 36   CALIX 1   CHENOWETH 1  
BLAZER 6   BROGAN 2   CALLAHAN 2   CHEROKEE 8  
BLEAKLEY 14   BRONCO 2   CALLAWAY 17   CHEROSAGE 22  
BLEDSOE 2   BROOKLYN 9   CALLENDER 2   CHERRY 7  
BLOCK 1   BROOKS 5   CALLERY 39   CHERRYVILLE 37  
BLOCKER 46   BROONER 26   CALLON 5   CHESAPEAKE 62  
BLOHM 6   BROSECO 13   CALOHAN 11   CHESNUTT 5  
BLOMGREN 3   BROWN 355   CALPINE 2   CHESSER 1  
BLOUNT 18   BROWNING 9   CALVERT 78   CHESSHER 1  
BLUCHER 2   BRUMMETT 9   CAM CORP. 15   CHEVRON 115  
BLUCO 14   BRUNER 57   CAMBELL 3   CHEYENNE 4  
BLUE JAY 8   BRUNO 3   CAMBRIAN 1   CHICAGO 350  
BLUE RIDGE 4   BRUNS 39   CAMBRIDGE 53   CHICO OIL 1  
BLUE SKY 23   BRYAN 15   CAMDEN 31   CHIEF 1  
BLUE WATER 3   BRYANT 40   CAMERINA 3   CHILDERS 10  
BLUE WING ENERGY 1   BUCHANAN 41   CAMERON 97   CHILDRESS 1  
BLUEBONNET 3   BUCK 24   CAMINO 12   CHILES 76  
BLUERIDGE 3   BUCKALOO 9   CAMOIL 1   CHILTIPIN 3  
BLUESTONE 2   BUCKINGHAM 13   CAMP 114   CHINN 7  
BLUFF 2   BUCKLEY 7   CAMPANA 4   CHIODO 2  
BLUHAWK 1   BUDA 2   CAMPARIA 1   CHIPPEWA 1  
BLUMBERG 10   BUELL 2   CAMPBELL 53   CHIQUITA 2  
BLUMENTHAL 1   BUESCHER 3   CAN-AM 1   CHISHOLM 1  
BLUTCH 2   BUETTNER 1   CANADIAN NORTHWEST 1   CHIZUM 26  
BOB'S SERVICE 1   BUFFALO 15   CANALES 28   CHOATE 2  
BOCK 6   BUNN 12   CANKIE 1   CHOCTAW 1  
BODE 2   BUNTE 10   CANNAN, MORRIS 154   CHOICE 19  
BOEGENTER 1   BUNTIN 1   CANNAN-SUBSURFACE 1   CHOYA DRILLING 12  
BOLDING 2   BUR-KAN 1   CANNON 12   CHRISCO 1  
BOLIN 10   BURCH 21   CANNONBALL 2   CHRISTIAN 3  
BOLING 8   BURDEN 1   CANTRELL 1   CHRISTICO 31  
BOLLER 4   BURDETTE 1   CANTRO 9   CHRISTIE 116  
BOLLING 1   BURDITT 2   CANUS 170   CHRISTILIN 2  
BOLLMAN 1   BURFORD 2   CANUSA 4   CHRISTINA 1  
BOLSA 1   BURK ROYALTY 69   CAPE 1   CHRISTOPHER 35  
BOLTON 2   BURKART 1   CAPITAL STAR 9   CHUMNEY 1  
BOMMER 18   BURKE 21   CAPITAN 1   CHURCH 4  
BONANZA 6   BURKHARDT 1   CAPITOL 50   CICHOWSKI 4  
BONAVENTURE 5   BURKHART 6   CAPITOL RESOURCES 5   CICO 103  
BOND, DURBIN 20   BURLESON 8   CAPPS 2   CIMAREX 5  
BOND, ROLAND 4   BURLINGTON 7   CAPRICORN 1   CIMARRON 42  
BONNER 2   BURNAM 1   CAPRINA 5   CINCO 11  
BONOIL 1   BURNELL 7   CAR-LOID 1   CIRCLE 20  
BOONE 3   BURNETT 54   CARAWAY 5   CIRCLE 7 OIL & GAS 2  
BOOTH & HOLMAN 4   BURNS 217   CARBIDE 2   CIRCLE W 6  
BOOTHE 1   BURR 9   CARBONIT 1   CIRRUS 2  
BOPCO 2   BURROW 3   CARDEN 1   CITADEL 2  
BORDER 50   BURSON 2   CARDOIL 1   CITATION OIL & GAS 12  
BOREN 3   BURTON 24   CAREY 13   CITEX 1  
BORNEFELD 1   BUSBY 4   CARIBBEAN 21   CITIES PROD. 2  
BORSODI 4   BUSCHMAN 2   CARIBOU 4   CITIES SERVICE 417  
BOSS EXPLORATION 1   BUSMORE 14   CARL 65   CITY OF JOURDANTON WATER BOARD 1  
BOSTON 11   BUTCHER 34   CARLANDA 10   CITY PRODUCTS 1  
BOTTOMS 1   BUTLER 74   CARLEE 2   CLA-BAR OIL 6  
BOUNDS 1   BUTT 8   CARLESS 4   CLAN 1  
BOUNTY 20   BUTTERCUP 1   CARLON 12   CLANTON 3  
BOURNE 2   BUTTES 37   CARLOS 4   CLARDY 18  
BOW 3   BUTTRAM 2   CARLSON 16   CLARDY & BARNETT 1  
BOWDEN 1   BUZZINI 14   CARLTON 3   CLARK 246  
BOWEN 3   BYARS 8   CARNES 18   CLARKSON 2  
BOWLES 22   BYER 1   CAROLINA 2   CLARKWOOD 2  
BOWLING 2   BYRD 11   CAROLINA-TEXAS 2   CLARY 1  
BOWMAN 4   BYS INCORPORATED 1   CARPENTER 3   CLAY 7  
BOWMAN CATTLE 14   C & E 167   CARR 226   CLAYTON 4  
BOYCE 7   C & J 1   CARRIE 1   CLEAR FORK 2  
BOYD & DURST 3   C & K 46   CARRILLO 1   CLEARY 22  
BOYD & GALT 1   C & M 1   CARRIZO 35   CLEGG 14  
BOYKIN 59   C & R 1   CARRL 223   CLEMCO 17  
BOYLE 71   C A G 7   CARROLL 1   CLEMENTS 10  
BOYSEN 34   C B & S 43   CARTER 317   CLEVA 2  
BRACHMAN 1   C B ENERGY 6   CARTHAY 22   CLEVELAND 8  
BRACKEN 3   C B GATHERING 4   CARTTER 1   CLEVENGER 11  
BRADBURY 1   C C LEASEHOLD 1   CARTWRIGHT 5   CLIFFS DRILLING 1  
BRADCO 19   C C M G 1   CASA GRANDE 2   CLIFFWOOD 1  
BRADEX 1   C C OPERATING 2   CASCADE 3   CLIMAX 3  
BRADFORD 5   C D CONSULTING 3   CASCO 1   CLINE 6  
BRADLEY 1   C D E 3   CASE-POMEROY 1   CLINTON 48  
BRADSHAW 2   C D RESOURCES 11   CASEY 4   CLIPPER 1  
BRADSTREET 1   C E T 3   CASH 5   CLOPTON 16  
BRADY 4   C G V 4   CASHCO 17   CLOUD 1  
BRAHANEY 2   C H & M 2   CASHION 9   CLOVER 77  
BRAHMAN 8   C H F 1   CASKEY 10   CLUCK 3  
BRALORNE 1   C J D 2   CASKIDS 8   CLYMORE 20  
BRAMAN 66   C L F 1   CASTLE 4   COALINGA 2  
BRAMMER 14   C M & M 1   CASTLEMAN 1   COAST CO. 18  
BRANDON 8   C M & W 1   CATAHOULA 4   COASTAL BEND DRILLING 1  
BRANHAM 15   C M C 6   CATARINA 3   COASTAL BEND OIL 17  
BRANN 1   C M L 1   CATER 2   COASTAL DRILLING & WORKOVER 5  
BRANNON 3   C M OIL 3   CATLETT 88   COASTAL ENGINEERING 3  
BRANSON 1   C M S 1   CATTLE LAND 56   COASTAL GULF 1  
BRASADA 1   C N 1   CAUBLE 11   COASTAL OIL & GAS 290  
BRASFIELD 1   C N G 15   CAVALIER 2   COASTAL OIL & LAND 10  
BRAUER 6   C N R 4   CAVALLA 14   COASTAL PLAINS 5  
BRAUN 21   C P C 73   CAWTHON 3   COASTAL PRODUCTION 6  
BRAVADO 1   C P C DALE OPERATING 2   CAYMAN 10   COASTAL REFINERIES 102  
BRAWLEY 1   C P X 25   CAYUGA 5   COASTAL STATES 519  
BRAYTON 87   C R A 5   CAZA OPERATING 1   COASTAL TEX 1  
BRAZELL 5   C R B 24   CE-BETH 3   COASTAL TREND 66  
BRAZOS 220   C R L 1   CEDAR HILL 1   COASTAL WELL SERVICE 1  
BRAZOS OIL & GAS 19   C R M 2   CELERON 4   COASTLAND 1  
BREGMAN 2   C S A 9   CELTIC 1   COASTLINE 69  
BREHM INVESTMENT 1   C S X 2   CENERGY 18   COATES 268  
BRELSFORD 2   C T OIL & GAS 1   CENIZA 32   COATS 3  
BRENAN 4   C T R 3   CENTAUR 3   COBBS 1  
BRENNAN 2   C X Y ENERGY 3   CENTENNIAL 28   COBRA 28  
BRENT 2   C-AIR 2   CENTEX 3   COCHRAN 40  
BREUER 34   C-K RESOURCES 7   CENTRAL 33   COCKBURN 62  
BREWER 5   C-TECHNOLOGY 2   CENTURA 19   COCKRELL 108  
BREWSTER 32   CABEZA 1   CENTURION 2   CODY 98  
BRIAN 1   CABILDO 2   CENTURY 63   COE 1  
BRIDAS 1   CABLE 1   CENZIA 1   COFFEE 78  
BRIDEWELL 31   CABOT 88   CERRO DE PASCO 11   COFFEY 11  
BRIDGE 53   CABRE 1   CHABTEX 1   COFFIELD 10  
BRIDGER 7   CACHARA 4   CHALLENGE 5   COFFMAN 25  
BRIDWELL 465   CACTUS 5   CHAMBERLAIN 13    
BRIGGS 1   CADDO 102   CHAMBERS 24    
BRIGHAM 56   CAESAR 2   CHAMBLISS 1    
BRIGHT 204   CAFRE 3   CHAMPION 3    
Operator Count   Operator Count   Operator Count   Operator Count  
COGGINS 1   CROCKET 1   DELFERN 2   DYCO 2  
COHEN 5   CROCKETT 7   DELHI 62   DYNAMIC 74  
COHO 5   CRON 24   DELHI-TAYLOR 130   DYONISIO 1  
COKE 1   CROOM 1   DELK 1   E & H 4  
COKER 1   CROSBY, A. W. 3   DELKER 14   E & L 1  
COKINOS 1   CROSS TIMBERS 1   DELLINGER 25   E C C 3  
COLBY 2   CROUCH 52   DELLWOOD 15   E E X 10  
COLE 63   CROW 7   DELRAY 64   E K O 12  
COLEMAN 2   CROWE 1   DELTA AMERICAN 24   E M J 1  
COLETTO CREEK 1   CROWELL 1   DELTA BRAVO 1   E O G RESOURCES 146  
COLGIN 1   CROWN 17   DELTA DRILLING 7   E P OPERATING 49  
COLINE OIL 1   CROWN CENTRAL 110   DELTA EXPLORATION 1   E R I 11  
COLLIER 17   CRUDE OIL 1   DELTA GULF 24   E S B E 1  
COLLINS 41   CRUMP 3   DELTA PETROLEUM 1   E-COR 3  
COLLOM 1   CRUTCHER 1   DELTA US 1   E-G JOINT VENTURE 6  
COLO 1   CRUTCHFIELD 1   DENALI 4   EADS 20  
COLOBRI 2   CRUX 3   DENISON 1   EAGLE 28  
COLOGNE 36   CRYSTAL 41   DENMAN 6   EARTH SCIENCES 6  
COLOMA 55   CUATRO 1   DENNIS 9   EASON 9  
COLONIAL 2   CUDE 21   DENOVO 4   EAST SIDE 2  
COLONNADE 1   CUELLAR 11   DENTLER 1   EAST WEST INVESTMENT 1  
COLORADO 57   CUERO 1   DENTON 1   EASTERN ENERGY 1  
COLSON 2   CULLEN 29   DENVER AMERICAN 3   EASTERN GAS 12  
COLT 2   CULLINAN 5   DEROSSETT 5   EASTERN OIL 1  
COLTON 30   CULOCO 1   DESANA 1   EASTERN STATES 6  
COLUMBIA 45   CULTON 16   DESCO 1   EASTERN TEXAS 3  
COLUMBIAN 3   CULVER 1   DEVEX 1   EASTERWOOD 21  
COLUMBUS 37   CUMEX 2   DEVINE 5   EATON 7  
COLVIN 4   CUMMINGS 10   DEVON 39   EBERT 2  
COMANCHE 16   CUMMINS 74   DEVONIAN 3   ECA HOLDINGS 1  
COMBINED AMERICA 1   CUMMINS & WALKER 129   DEWALT 3   ECHO 1  
COMBINED PRODUCING 1   CUNNINGHAM 45   DEWBRE 111   ECHOLS 51  
COMBUSTION PRODUCTS 7   CURRAN 1   DEWITT OIL & GAS 3   ECKERT 7  
COMCO-CENTURION 1   CURREY 3   DIADEM 1   ECKOLS 2  
COMETRA 22   CURRY 6   DIAMEX 8   ECLETO 1  
COMMERCE 2   CUSACK 1   DIAMOND 42   EDCO 9  
COMMERCIAL 53   CUTBIRTH 17   DIAMOND SHAMROCK 3   EDDY 33  
COMMONWEALTH 14   CXY ENERGY 1   DIASU 3   EDEN OIL 2  
COMPASS 2   CYCLOPS 2   DICE 2   EDGAR 13  
COMPLETE OIL 4   CYPRESS E & P 4   DICK 39   EDGE 120  
COMSTOCK 17   CYPRUS 24   DICKSON 1   EDGE PETROLEUM 1  
CON-TEX OIL 1   CZAR 11   DIETERT 3   EDINBURG 1  
CONCHO 11   D & D 9   DIFFERENTIAL 1   EDISTO 1  
CONCORD 12   D & G 54   DILLARD 27   EDMISTON 4  
CONDRY 1   D & M 1   DILLEY 45   EDMONT 1  
CONE 1   D A R T 3   DILLON 68   EDWARDS 71  
CONES 3   D B O 5   DINERO 124   EGAN 36  
CONFEDERATE 10   D C B OIL & GAS 1   DINN 1   EHMAN 1  
CONLEY 3   D D D ENERGY 1   DIRKS 104   EI-FEL 1  
CONN 1   D D G 31   DIRNETT 2   EICHER 6  
CONNER 1   D D OIL 1   DISCORBIS 45   EILAND 1  
CONOCO 364   D J EXPLORATION 1   DISCOVERY 24   EKO 1  
CONQUEST 19   D K D 4   DISHMAN 3   EL CAMINO 1  
CONROE 77   D K G 11   DIVERSA 12   EL CHORRO 3  
CONROY 1   D L B 1   DIXEL 15   EL DORADO 26  
CONSERVATIVE OIL 16   D M C 1   DIXIE 19   EL INDIO 1  
CONSOLIDATED 131   D M L 4   DIXILYN 2   EL PASO 119  
CONSTANTIN 1   D R S 4   DIXON 30   EL REGALO 3  
CONTINENTAL 1341   D S M OIL 2   DOBBINS 3   EL REY PETROLEUM 2  
CONTINENTAL TREND RESOURCES 11   D V OIL 1   DODGEN 1   EL RIO 1  
CONTRACT ENERGY 1   D Y EXPLORATION 3   DOHERTY 1   EL-TEX 3  
CONVEST 77   D'UNGER 5   DOLCH 10   ELAM 2  
CONWAY 4   DABNEY 1   DOLPHIN 2   ELAND 1  
COOK 18   DADE 1   DOME 1   ELEANOR OIL 1  
COOKE 2   DAIGEL 1   DOMESTIC FUELS 1   ELECTROSEIS 2  
COOLEY 1   DAKAMONT 7   DOMINION 78   ELECTROTHERMIC 9  
COON 13   DAL-LONG 6   DONICO 5   ELF AQUITAINE 4  
COON-MURPHY 1   DALE 49   DONKIN 2   ELINOR OIL 1  
COONRAD 5   DALECO 24   DONZIS 2   ELLEDGE 2  
COOPER 7   DALEX 3   DOOLEY 1   ELLIOTT 12  
COPANO 25   DALLAS 10   DORADO 1   ELLISON 2  
COPETCO 3   DALPORT 23   DORAN 48   ELLOCO 1  
COQUAT 131   DAMSON 41   DORCHESTER 33   ELLSTROM 1  
COQUINA 21   DANCIGER 29   DORFMAN 1   ELLSWORTH 110  
CORAL 12   DANCO 1   DORRANCE 9   ELMAX 1  
CORDA 1   DANE 2   DORRIS 3   ELMER 1  
CORDELE 18   DANIEL 18   DOSS 2   ELMONT 1  
CORDELL 2   DANIELS 3   DOUBLE EAGLE 36   ELMS 3  
CORDER 1   DANIELSON 6   DOUBLE J 2   ELTOBILT 1  
CORDER, KNOX 3   DANMOR 1   DOUBLE PLAY 17   ELWOOD 1  
CORE EXPLORATION 3   DANOIL 3   DOUBLE S 1   ELY 2  
CORENERGY 5   DANREY 5   DOUBLE U 30   EMINENT 2  
CORGEY 38   DANSFIELL 28   DOUGHERTY 108   EMPIRE 5  
CORKILL 1   DANT 2   DOUGHTY 45   EMRY 1  
CORLEY 16   DANTEX 9   DOUGLAS 121   ENCANA 1  
CORNELIUS 1   DANZIGER 1   DOVRE 2   ENCINO 20  
CORNELL 3   DARBY 14   DOW CHEMICALS 119   ENCINO ENERGY 1  
CORNERSTONE 2   DARCY 3   DOWNEY 1   ENCO EXPLORATION 82  
CORNING 7   DARNER 11   DOWNING 12   ENCON 5  
CORONADO 72   DARROH 2   DOYLE 5   ENDEAVOUR 6  
CORPENING 15   DARSEY 8   DOYNO 2   ENDERLI 1  
CORPUS CHRISTI CORPORATION 13   DASA 13   DR. MC 1   ENDICOTT 3  
CORPUS CHRISTI DRILLING 1   DASH 9   DR. PEPPER BOTTLING CO. 1   ENDREX 4  
CORPUS CHRISTI EXPLORATION 5   DASKAM 2   DRAKE 5   ENDURO 1  
CORPUS CHRISTI LEASEHOLDS 13   DAUBERT 197   DRAPER 14   ENERCO 4  
CORPUS CHRISTI MANAGEMENT 43   DAUBES 2   DREXEL 9   ENERCORP 2  
CORPUS CHRISTI OIL & GAS 176   DAUCHY 50   DREYFUS 2   ENERGETICS 56  
CORPUS CHRISTI REFINING 5   DAUGHERTY 7   DRILLCO 3   ENERGEX 2  
CORRON 1   DAUNTLAS 2   DRILLERS ENERGY 37   ENERGO 1  
CORRUM 1   DAVACO 1   DRILLING & EXPLORATION 40   ENERGY 44  
CORSICANA 1   DAVENPORT 36   DRILLMAR 1   ENERGY DEVELOPMENT 86  
CORUM 31   DAVES 1   DRISCOLL 32   ENERGY ENTERPRISES 6  
CORY 2   DAVIDOR 20   DRIVER 3   ENERGY EQUITY 1  
CORZELIUS 2   DAVIDSON 15   DRYER 1   ENERGY EXPLORATION 1  
COSDEN PETROLEUM 28   DAVIE 1   DUAL 1   ENERGY HUNTER 1  
COSEKA 1   DAVIES 1   DUDLEY 1   ENERGY INTERNATIONAL 4  
COSMO 6   DAVIS 375   DUER-WAGNER 2   ENERGY INVESTMENTS 6  
COSNER 11   DAVMOR 1   DUFF 1   ENERGY PROJECTS 2  
COSTA 4   DAVOIL 1   DUGGER 68   ENERGY RESERVES GROUP 26  
COSTILLA 17   DAWSON 51   DUKE 2   ENERGY RESOURCES 9  
COTTON 104   DAY 1   DULANEY 124   ENERGY SEARCH 2  
COTTONWOOD 33   DAYVAULT 1   DULCE OIL 3   ENERGY SOURCES 7  
COUCH 4   DE SHANE 1   DULUP 17   ENERGY TREATING 1  
COUGAR 6   DEAN 16   DUNBAR 5   ENERGY UNLIMITED 5  
COWAN 1   DeARMON 1   DUNCAN 17   ENERQUEST 2  
COWANCO 6   DEBROW 1   DUNHAM 4   ENEX 2  
COWELL 1   DECKER 22   DUNHILL 3   ENEXCO 5  
COX 896   DECLEVA 6   DUNLAP 23   ENGELKE 93  
COYLE 10   DEEP ROCK 32   DUNN 3   ENGEO 83  
COYOTE TRUST 1   DEEP SOUTH 6   DUNNAM 2   ENGLAND 1  
CRAIG 2   DEERING 1   DUNWOODY 16   ENGLE 1  
CRANFILL 2   DEETER 20   DUPONT 3   ENGLISH 1  
CRAWFORD 18   DeGRAZIER 2   DUQUESNE 1   ENHANCED ENERGY 1  
CREDO 1   DeGUIRE 8   DURANGO 2   ENI EXPLORATION 2  
CREECH 1   DEICO 1   DURBIN BOND 9   ENRE 22  
CREIGHTON 3   DEKALB ENERGY 9   DURBIN OIL 2   ENRON 389  
CRESCENT 30   DEL MAR 23   DURHAM 2   ENSCO 1  
CRESLENN 5   DEL PETROLEUM 6   DURST 8   ENSERCH 54  
CREST 33   DELANEY 1   DUTY TOOL 3   ENSIGN 1  
CRESTMONT 1   DELANGE 267   DUVACO 1   ENSOURCE 1  
CREWS 20   DELANO 1   DUVAL COUNTY RANCH CO. 66    
CRICKET 3   DELAWARE 3   DUVAL OIL 45    
CRIMSON 3   DELCAR 12   DUVAL PRODUCTION 11    
CRIPPLE CREEK 2   DELEE 2   DYAD 1    
Operator Count   Operator Count   Operator Count   Operator Count  
ENSTAR 10   FIRST ARANSAS 1   GAINCO 12   GLOVER 1  
ENTERPRISE 28   FIRST ENERGY 11   GAINES 10   GLYNN-THOMPSON 1  
ENTERPRISES 2   FIRST MATAGORDA 5   GAITHER 10   GO ENERGY 3  
ENTEX 19   FIRST OIL 1   GALATIA 2   GO OIL 1  
ENTRUST 1   FIRST ROCK 6   GALAXY 171   GO-ENERGY 4  
EPPLER 1   FIRST UNITED 2   GALLAHER 7   GO-TEX 8  
EQUINOX 1   FIRSTRIKE ENERGY 2   GALLO DE CRISTAL 1   GODBOUT 1  
EQUITABLE 12   FISCHER 80   GALLOWAY 1   GODSEY 11  
EQUITX 7   FISH 5   GALO ENERGY 6   GOERNER 1  
EQUITY 7   FISHER 24   GALT 1   GOETZ 8  
ERIN SOUTHWEST 1   FISHER-WEBB 25   GALVEZ 1   GOFORTH 2  
ERNEST 5   FITE 1   GAMBLE 6   GOHLKE 3  
ERSKINE 22   FITTIPALDO 1   GAMMA RESOURCES 3   GOHLKE-BENGE 1  
ERWIN 1   FITZGERALD 9   GAMMETER 1   GOLDEN 40  
ESCOBA 1   FITZPATRICK 67   GAR 4   GOLDING 3  
ESCONDIDO 5   FIVE RESOURCES 6   GAR-FLO 1   GOLDKING 244  
ESENJAY 317   FLAG-REDFERN 24   GARCIA 1   GOLDMAN 1  
ESGEN 2   FLAITZ 59   GARDESCU 1   GOLDRUS 23  
ESPADA 4   FLAMINGO 13   GARDNER 36   GOLDSMITH 6  
ESPERANZA 6   FLANAGAN 2   GARLAND 2   GOLDSTON 243  
ESTES 2   FLARE 2   GARLITZ 4   GOLDSTRAND 1  
ESUNAS 5   FLASKE 1   GARNER 1   GOLIAD 34  
ESVES 1   FLEET 2   GARNETT 6   GOLSON 1  
ETHREDGE 2   FLEMING 1   GARR 2   GOMA 2  
ETHYL 13   FLETCHER 7   GARRETT 8   GOOD DAY 8  
ETOCO 11   FLO-TEX 1   GARRISON 12   GOOD HOPE 147  
EUBANK 4   FLOBOOTS 4   GARVEY 8   GOODALE 22  
EUBANKS 3   FLORENCE 3   GARVIN 1   GOODELL 4  
EUGENE 9   FLORIDA 24   GARY 1   GOODHUE 1  
EURA B. OIL 1   FLOUR BLUFF 2   GAS 2   GOODRICH 13  
EURATEX 2   FLOURNOY 233   GAS PRODUCING ENTERPRISES 55   GOODWIN 1  
EUREKA 1   FLOWERS 23   GAS ROCK 5   GORDEN 1  
EUROPEAN 20   FLOYD 2   GASAWAY 1   GORDON 12  
EVANS 56   FLUSS 1   GASOLINE PRODUCTION 126   GORMAN 330  
EVCO 7   FLY 70   GASPAR RICE 1   GORUM 6  
EVERBRIGHT 7   FLYING DIAMOND 2   GASPER RICE 34   GOSE 137  
EVEREST 100   FLYING W 1   GASROCK 3   GOTTLIEB 2  
EVERGREEN 22   FLYNN 19   GASTEX 1   GOUGER 11  
EVERS 1   FOHS 13   GASTRANS 6   GOULD 1  
EVERSOLE 1   FOHS & FOHS 1   GATES 2   GOVERNMENT WELLS 24  
EWING 4   FOLWELL 3   GATHINGS 36   GRABOWSKI 5  
EXCELSIOR 6   FONTANA 10   GATO 2   GRACE 72  
EXETER OIL 17   FORAN 3   GAUNTT 3   GRACEY 1  
EXPANDO 67   FORBES 2   GAUTREAUX 1   GRAGG 2  
EXPEX 1   FORCE 4 ENERGY 1   GAYLE 1   GRAHAM 382  
EXPLORATION 31   FORCENERGY 2   GEDDIE 4   GRAMAC 1  
EXPLORATION DRILLING 1   FORD 121   GEE 1   GRAMMAR 1  
EXPLORATION INVESTMENTS 1   FOREE 4   GEER 2   GRANDE 12  
EXPLORATION, LTD 1   FORES 1   GEIER-JACKSON 2   GRANDIN 1  
EXPLORECO ENERGY 2   FOREST 380   GEISE 3   GRANITE 4  
EXPLORER 1   FORESTER 5   GEISELMAN 15   GRANT 7  
EXPORT 10   FORETICH 1   GEISER 52   GRARIDGE 21  
EXPRESS 3   FORGOTSON 1   GEM 8   GRASTY 2  
EXPRO 1   FORMAN 2   GEMACA 1   GRAVIS 59  
EXSUN 32   FORNEY 243   GEMARMI 2   GRAWARD 1  
EXTEX 1   FORT APACHE 1   GEMINI 9   GRAY 39  
EXXETER PETROLEUM 20   FORT BEND 16   GENERAL AMERICAN OIL 18   GRAY WOLFE 2  
EXXON 2101   FORT WORTH 1   GENERAL ATLANTIC 1   GRAYBURG 6  
EZZELL 14   FORTENBERRY 6   GENERAL CRUDE 259   GREAT BASINS 13  
F & B ENERGY 2   FORTRESS MINERALS 4   GENERAL PETROLEUM 2   GREAT EXPECTATION 2  
F C D 3   FORTSON 1   GENERAL PROD. 7   GREAT LAKES 29  
F F A 2   FORTUNE 1   GENERAL WELL 3   GREAT NATIONAL 1  
F G B 2   FOSS 2   GENESIS 137   GREAT PLAINS 6  
F-W OIL 1   FOSSIL BAY 5   GEO ENERGY 5   GREAT SOUTHERN 2  
FAGAN 5   FOSSIL EXPLORATION 19   GEO EXPLORATION 3   GREAT SOUTHWEST 1  
FAGIN 1   FOSTER 14   GEO FOCUS 1   GREAT SOUTHWESTERN 1  
FAIN 9   FOUCH 1   GEO-REEF 2   GREAT STATES 3  
FAIR 199   FOUNDATION OIL 1   GEO-SOURCE 1   GREAT TEXAS 4  
FAIRVIEW 1   FOUNTAIN 8   GEOCHEMICAL 66   GREAT TEXAS CRUDE 23  
FAIRWAY 7   FOUR STAR 1   GEODE 4   GREAT WEST PET. 3  
FAITH 1   FOUR-B TRUST 31   GEODOMINION PETROLEUM 43   GREAT WESTERN 15  
FALCO 2   FOURTEEN-HUNDRED CORPORATION 1   GEODYNAMICS 72   GREATHOUSE 2  
FALCON 57   FOWELL 1   GEOGRAPHIC 1   GREBIN 1  
FALCONE 1   FOWLER 1   GEOLOGICAL RESEARCH 21   GREEHEY 3  
FALLEY 5   FOX 76   GEONATURAL RESOURCES 6   GREEN 11  
FALLS 1   FRANCIS 5   GEOPHYSICAL 10   GREENBRIAR 1  
FALLS CITY 1   FRANCITAS 13   GEORGE 8   GREENBRIER 59  
FAMCOR 10   FRANK 1   GEOSEARCH 5   GREENHILL 5  
FANCHER 3   FRANKE 2   GEOSOUTHERN 7   GREENWOOD 2  
FANION 2   FRANKEL 14   GEOTEK 1   GREER 8  
FANSLER 1   FRANKFORT 15   GERALD 2   GREGG 50  
FANT 1   FRANKLIN 26   GERKER 1   GRELLING 16  
FAR 3   FRANKS 1   GERMANY 1   GRETA 6  
FAR WEST 3   FRANZ 3   GERNER 1   GREY WOLF 6  
FARAGSON 1   FRASER 7   GERODETTI 1   GRIFFIN 5  
FARENTHOLD 33   FRAZER 2   GERONIMO 40   GRIFFITH 7  
FARGASON 6   FRAZIER 76   GERTEX 1   GRIMES 13  
FARGO 34   FREDONIA 2   GES 5   GRIMM 6  
FARISH 3   FREEDMAN 13   GETTY 264   GRISHAM 1  
FARMERS 1   FREEMAN 46   GIBLIN 1   GRISINGER 1  
FARMOR 2   FREEPORT 1   GIBRALTAR 17   GROFF 1  
FARNEY 1   FREER 3   GIBSON 20   GROUP 9  
FARNSWORTH 3   FREMONT 10   GIDDENS 1   GROVER 2  
FARROW 1   FRENCH OIL 28   GIDEON 2   GROVER-MCKINNEY 1  
FARSON 1   FRENCH, L.D. 1   GIEBEL 2   GRUBB 48  
FASKEN 8   FRESNO 1   GIERHART 38   GRUBBS 1  
FASSY 1   FRIDAY 5   GIFFORD 8   GRUBSTAKE 1  
FAULK 3   FRIO 115   GILBERT 1   GRUSS 2  
FAYE 1   FRIO-TEX 65   GILBREATH 2   GRUY 18  
FAYETTE COUNTY 4   FROHNHOEFER 8   GILCHRIST 1   GUADALUPE 21  
FEAGIN 3   FRONTIER PETROLEUM 17   GILCREASE 85   GUARANTY 3  
FEAZEL 1   FROST 62   GILGER 12   GUARDIAN 25  
FECH 1   FRYER 1   GILL 30   GUENTHER 2  
FEDERAL INDUSTRIES 1   FULK 2   GILLAND 1   GUERNSEY 19  
FEDERAL OIL 1   FULLER 52   GILLESPIE 39   GUEST 4  
FEDERAL ROYALTY 13   FULLERTON 5   GILLEY 1   GUFFEY 3  
FEE OIL & GAS 1   FULTON 4   GILLIAM 1   GUIBERSON 2  
FEHLHABER 1   FUNDAMENTAL OIL 3   GILLILAND 1   GUILBAULT 1  
FELAND 3   FURNELL 1   GILLOCK 1   GUINN 2  
FELDERHOFF 7   FURSE 1   GILLRING 107   GULF AMERICAN 16  
FELDMAN 20   FUSON 1   GILMORE 1   GULF BOARD OIL 22  
FELMONT 10   FUTCH 1   GILSTER 2   GULF CANADA 4  
FELTNER 5   FUTURE EXPLORATION 6   GINCO 4   GULF COAST 140  
FENDER 8   FUTURE PETROLEUM 4   GINGER 3   GULF ENERGY 92  
FENN 16   G & H 2   GINTHER 168   GULF INTERSTATE 11  
FENNER 1   G & M 3   GISSEL 1   GULF LAKES 1  
FENSTERMAKER 1   G & P 5   GIST 2   GULF MINERALS 34  
FERGUSON 61   G & S 1   GIVENS 1   GULF OIL 707  
FERRIER 4   G A P 5   GLACIER 85   GULF PLAINS 29  
FIDELITY 112   G A S 11   GLASCO 2   GULF PROD. 7  
FIELD 9   G C E A 4   GLASS 1   GULF RESOURCES 3  
FIELD DRILLING 2   G D ENERGY 1   GLASSCOCK 356   GULF SANDS 126  
FIELDS 11   G D K 3   GLASSEL 2   GULF SOUTH 12  
FIFTEEN 2   G E C 2   GLAZIER 1   GULF STATES 52  
FIFTH ANDREWS 1   G H J 4   GLENCO 13   GULF STREAM 12  
FIKES 3   G H R 50   GLENDA 10   GULF TIDE 1  
FILON 12   G L G ENERGY 8   GLENN 22   GULFBOARD 2  
FINA 102   G M T 1   GLENN & ASSOCIATES 5   GULFCO 1  
FINCH 2   G S I 2   GLENNCO 5   GULFPORT 2  
FINDER 1   G W R 2   GLENORA 4   GULFSHORE 18  
FINE 1   GABRIEL 2   GLENWAR 2    
FINGER 22   GAEA 1   GLO CO. 1    
FINLEY 11   GAELIC 2   GLOBAL 8    
FINNEY 4   GAGE 1   GLOBE OPERATING CO. 8    
Operator Count   Operator Count   Operator Count   Operator Count  
GULFSIDE 1   HAWLEY 76   HOOVER 39   INTERCOASTAL 29  
GULFSTAR 22   HAWN 311   HOPE 30   INTERCONTINENTAL 3  
GULFSTREAM 25   HAWORTH 2   HOPE HILL 1   INTERNATIONAL 12  
GULFTON OIL 1   HAWTHORN 9   HOPE PRODUCTION 1   INTERNATIONAL NUCLEAR 14  
GUM HOLLOW 1   HAWTHORNE 6   HOPEHILL 7   INTERNATIONAL OIL & GAS 14  
GURLEY 1   HAYDEN 11   HOPF 1   INTERNATIONAL WESTERN 3  
GUTHRIE 3   HAYES 10   HOPI 3   INTERSTATE MINERALS 10  
GUTIERREZ 11   HAYNES 83   HOPPER 1   INTEX 6  
GYPSY 1   HAYNESWORTH 1   HOPSON 10   INTRAMERICAN 11  
H & H 3   HAYPEC 7   HORIZON 5   INTREPID 6  
H & H DEVELOPMENT 1   HAYS 20   HORMACHEA 1   INVESTEX 1  
H & H DRILLING 2   HAZEL 2   HORN 100   INVESTMENT VENTURES 3  
H & J DRILLING 262   HAZELETT 4   HORNADAY 2   INVESTORS NATURAL GAS 1  
H & M 4   HAZLITT 1   HORNBECK 2   INVESTORS SYNDICATE OF SOUTHWEST 8  
H & N 1   HEAD 6   HORNBERGER 5   INVINCIBLE 1  
H & R 1   HEAD & WELSH 34   HORNE 3   IOWA-PAYNE 1  
H & S 10   HEADINGTON 55   HORNER 2   IRBY 3  
H & W 7   HEADWATERS 2   HORNSBY 1   IRENE 4  
H A J J 7   HEARD 27   HORRIGAN 4   IRISH OIL 8  
H C M 2   HEARTLAND 3   HORSTING 3   IRVING 7  
H C W 3   HEBERT 5   HORTON 2   IRWIN 9  
H D & H 4   HECAR 1   HORVATH MILLS 1   ISBELL 1  
H D C 1   HEDGE 22   HOSKINS 15   IVEY TERRY 1  
H E & D 1   HEDLEY 11   HOTCHKIN 19   IVY 3  
H E A 1   HEDRICK 5   HOU-TEX 16   J & C 59  
H E C I 13   HEEMANN 1   HOUCHINS 1   J & D 2  
H G I 3   HEEP OIL 167   HOUGEN 1   J & E 1  
H L B 1   HEID 7   HOUGH 7   J & J 1  
H M C 1   HEINZE 2   HOUSE 1   J & M WELL SERVICE 14  
H M S 5   HELDENFELS 14   HOUSER 27   J & W OIL 1  
H N G 185   HELIS 6   HOUSH 29   J A H 72  
H O R 1   HELLAND 37   HOUSTON 10   J B H 1  
H P R 1   HELMERICH 7   HOUSTON DOMESTIC 4   J B OIL & GAS 1  
H R B OIL 2   HELVETIA 2   HOUSTON DRILLING 4   J F D 3  
H R H 2   HEMINGWAY 10   HOUSTON ENERGY 3   J H 1  
H S RESOURCES 4   HEMPHILL 1   HOUSTON EXPLORATION 43   J H I 1  
H T H 1   HENDERSON 24   HOUSTON GULF 53   J I L 5  
H V DRILLING 1   HENDRICKSON 2   HOUSTON INDEPENDENT 1   J J 1  
H-M OIL 154   HENNA 1   HOUSTON MINERAL 10   J J R S 1  
HAAS 205   HENNIG 1   HOUSTON NATURAL GAS 111   J L RESOURCES 2  
HABER 23   HENNINGER 1   HOUSTON OIL 414   J M C RESOURCES 2  
HABERLE 2   HENRY 30   HOUSTON OIL & MINERALS 125   J M G FINANCIAL 1  
HADA 80   HENSCH 2   HOUSTON OIL FIELDS 6   J M M ENERGY 3  
HADEN 2   HENSHAW 145   HOUSTON OIL WELL SERVICE 7   J O C OIL 1  
HAGAN 6   HENSON 5   HOUSTON OPERATING 3   J R B 1  
HAGEN 39   HERCULES 8   HOUSTON PETROLEUM 24   J R G 24  
HAGEN-GREENBRIAR 1   HERD 2   HOUSTON ROYALTY 33   J R OIL & GAS 1  
HAGENS 11   HERITAGE 14   HOWARD 39   J S & P OPERATING 1  
HAGGARD 1   HERLION 7   HOWELL 703   J S PETROLEUM 2  
HAGGARTY 1   HERNDEN 3   HOWETH 154   J T R 3  
HAIL 5   HERNDON 16   HOXSEY 12   J W P EXPLORATION 1  
HAILEY 14   HERRING 28   HRBUTZ 1   J W R 12  
HAJECATE 3   HERRINGTON 8   HUB CITY 1   J-3 OIL 53  
HALAMICEK 6   HERSCHAP 7   HUBBARD 4   J-O'B OPERATING 5  
HALBOUTY 146   HERSCHBERGER 1   HUBBLE 10   J-W 41  
HALL 4   HERTON 1   HUBCO 2   J-WIL 2  
HALL-HOUSTON 9   HERZSTEIN 1   HUBER 94   J.A.H 1  
HALLIBURTON 7   HESTER 10   HUBER, J.H. 1   JACKSON 22  
HALLMARK 5   HETCO 6   HUBER, J.M. 9   JACOB 1  
HALLS CREEK 1   HEWIT & DOUGHERTY 281   HUDDLE 10   JACOBS 14  
HALLWOOD 5   HEWITT 49   HUDGENS 4   JAD OIL 2  
HAMBLEN 1   HEYNE 1   HUDGINS 13   JADE 6  
HAMBY 2   HEYSER 9   HUDSON 22   JAMES ENERGY 1  
HAMCO 3   HIAWATHA 230   HUENERS 1   JAMESON 2  
HAMILL 211   HIAWATHA(HOLLIDAY) 2   HUFF 2   JAMEX 50  
HAMILTON 89   HIBBERT 18   HUFFCO 21   JAMIN 15  
HAMM 6   HIBERNIA 1   HUFFINGTON 21   JANAN 10  
HAMMAN 140   HICKEY 1   HUFFMAN 1   JANCO 2  
HAMMAX 1   HICKOK 30   HUGHES 866   JANE OIL 1  
HAMMER 2   HICKS 10   HUGHEY 6   JANEX 2  
HAMMONDS 20   HIDALGO 3   HUISACHE 109   JARBE 1  
HAMON 322   HIDALGO-WILLACY 3   HULSEY 5   JARMAN 1  
HAMPTON 3   HIGGINS 3   HULVER 2   JARMON 1  
HANCO OIL & GAS 1   HIGH ISLAND 6   HUMBLE 5487   JARRELL 3  
HANCOCK 8   HIGH PLAINS 10   HUMPHERY 8   JAY-DEE 21  
HANCORP 1   HIGHLAND OIL 77   HUMPHRIES 16   JAY-LIN 6  
HAND 2   HIGHLAND RESOURCES 16   HUNDRED 2   JAYCO 3  
HANEY 1   HILBURN 2   HUNE 1   JAYRED 2  
HANKAMER 67   HILCORP 24   HUNT 485   JEDCO 5  
HANKEY 4   HILL 229   HUNT HASSIE EXPL. 1   JEDSCO 1  
HANNA 1   HILLCREST 26   HUNTER 30   JEFFERS 1  
HANNAH 2   HILLIARD 56   HUNTINGTON 5   JEFFERSON LAKE 25  
HANOVER 14   HILLIER 59   HURBROUGH 8   JEFFRIES 1  
HANSLIP 5   HILLIN 1   HURD 70   JENKINS 4  
HANSON 383   HILLMAN 2   HURLBUT 22   JENNEY 3  
HANTHO-NELSON 1   HILLSMAN 20   HURLEY 4   JENNINGS 96  
HANTON 1   HILLSMAN-GREENBURG 1   HURT 3   JERCO 2  
HARBERT 1   HILTY 19   HUSKY 23   JERGINS 86  
HARBOR 1   HIME 1   HUTCHINS 15   JERGINS OF TEXAS 5  
HARDIE 1   HINDS 5   HUTSON 1   JET 7  
HARDIN 11   HINER 3   HYDEN 3   JETCO 1  
HARDING 18   HINES 4   HYDRO-CARBONS 10   JETSTREAM 1  
HARDWICK 28   HINKLE 24   HYDROCARBON EXPLORATION 1   JETTA 1  
HARDWICKE 10   HINSON 15   HYDROCARBON GATHERING 14   JILPETCO 1  
HARDY 1   HINTON 16   HYDROCARBON HORIZONS 9   JIMCO 1  
HARGEST 3   HISTORICAL 2   HYDROCARBON MGMT. 1   JOBST 4  
HARGIS 9   HIXON 2   HYDROCARBON OPERATING 6   JOCELYN 2  
HARGRAVE 27   HOBBY 4   HYDROCARBON PROD 2   JOCELYN-VARN 58  
HARGROVE 4   HOBLITTZELLE 1   HYDROCARBON PROD. 17   JOHANSON 2  
HARING 130   HOBLITZELLE 1   HYDROCARBON TRANSMISSION 1   JOHNSON 114  
HARKEN 8   HOBSCO 3   HYLAND 1   JOHNSTON 30  
HARKINS 591   HODGE 9   HYNES 15   JOJON 1  
HARLEY 3   HODGES 1   HYQUEST 66   JOLLEY 1  
HARMON 1   HOFFER 5   HYSO 1   JONES 157  
HARMONY 5   HOFFMAN 1   HYTECH 13   JONES CREEK 1  
HARPER 43   HOFHEINZ 1   I M C 4   JONNELL 25  
HARPER HEFTE 44   HOGAN 5   I M E F 1   JORDAN 14  
HARPER, SAM H. 1   HOLBERT 1   I O C 8   JOSEY 59  
HARPER-SMITH 28   HOLBROOK 5   I O G 2   JOYCE 2  
HARRELL 50   HOLCOMB 1   I P PETROLEUM 9   JOYCE & HILTY 16  
HARRELL & SOUTHWORTH 15   HOLDEN 22   I T R 2   JUANITA 1  
HARRINGTON 2   HOLEMAN 1   IBERIA 1   JUDARTH 2  
HARRIS 19   HOLIDAY RESOURCES 13   ICARUS 6   JUDD 3  
HARRIS-FUNK 1   HOLLAND 93   IDAHO 3   JUPITER 15  
HARRISON 200   HOLLIDAY 7   ILLINOIS PETROLEUM 26   JUSTISS-WEARS 1  
HARRISON, DAN J., JR. 7   HOLLIMON 53   IMPACT 1   K & A 21  
HARROB 1   HOLLIS 2   IMPERIAL 15   K & H 54  
HARROUN 2   HOLLOWAY 51   INCA 22   K & K 2  
HARRUS 6   HOLLUB 26   INCO 1   K & N 1  
HART 20   HOLLY 68   INDEPENDENCE 2   K & S 2  
HARTEX 1   HOLMES 55   INDEPENDENT 22   K B 34  
HARTMAN 1   HOLOTIK 2   INDEXGEO 41   K C 1  
HARVARD 2   HOLT 2   INDIOLA 2   K C S 25  
HARVEY 46   HOLTZCLAW 1   INDUSTRIAL 16   K D ENERGY 1  
HARWOOD 48   HOMA 4   INEXCO OIL 89   K L S 1  
HASBRO 1   HOMABY 7   INGRAM 1   K M D 2  
HASCHKE 4   HOME 22   INLAND 34   K O G OPERATING 24  
HASEMAN 1   HONCHO 8   INLAND EXPLORATION 1   K O T 1  
HASSELMAN 1   HONDO 2   INLAND OCEAN 52   K P EXPLORATION 13  
HAUSER 14   HONOLULU 1   INLAND PETROLEUM 2   K R M 18  
HAVENS 1   HOOD 2   INMAN 1    
HAWK 1   HOOKER 2   INTEGRAL 100    
HAWKEYE 2   HOOKS 2   INTEGRATED OPERATOR 3    
HAWKINS 115   HOOPER 3   INTER-ALLIED 1    
Operator Count   Operator Count   Operator Count   Operator Count  
K T X 4   KRAUSE 1   LEECO 1   LYMAN, C.V. 1  
K W B 1   KRCHNAK 1   LEEDE 7   LYNAL 1  
K-2 1   KRENEK 2   LEFEVRE 7   LYNBROOK 4  
K-N OPERATING 6   KRESCENT 1   LEGACY 57   LYNCH 34  
KA-HUGH 24   KRITI 1   LEGEND 5   LYNCO 3  
KA-MATT 3   KRUEGER 1   LEGER 12   LYND 10  
KADANE 2   KRUIDENIER 1   LEHMERTZ 1   LYNDEL 1  
KAISER OIL 13   KRUSEN 1   LEMARCO 17   LYNN 8  
KAISER-FRANCIS 29   KRYSTAL-LIN 1   LENSGRAF 1   LYNTON 1  
KALER ENERGY 63   KUBELA 1   LENT 1   LYNX 4  
KALLIES 1   KUEBLER 1   LEONA 1   LYONS 51  
KALLINA 44   KUENSTLER 8   LEONARD 18   LYTLE CREEK 5  
KALON 1   KUHNS 2   LEONE 2   M & B 5  
KALSEA 1   KUMLER 10   LEPOVITZ 1   M & F D C 1  
KAMLOK 11   KUNETKA 1   LERN 2   M & G OPERATING 5  
KANE 3   KUYPCO 2   LES TEXAS 3   M & R EXPLORATION 1  
KANEB 2   KUYPERS 13   LESH 9   M & S 1  
KANELLOS 1   KYLE 1   LESKO 1   M & W 15  
KANSAS 1   L & A ENERGY 4   LESS 1   M C A 20  
KARBUHN 2   L & B OIL 12   LEUSCHNER 1   M C O R 7  
KARCHER 2   L & F 10   LEVERIDGE 6   M C OIL 9  
KARNCO 5   L & L PETROLEUM 69   LEVINSON 1   M C S 2  
KARNES 4   L & M 1   LEVY 1   M C Z 10  
KARSTEN 76   L & T 1   LEWIS 196   M G EXP 8  
KASAN 2   L & W 2   LEWIS PETRO 14   M G F 60  
KATE 1   L B N 3   LEXINGTON 2   M G U 2  
KATZ 293   L G D C 7   LEY 13   M H 2  
KAULBACH 9   L G J 4   LIBERTY 23   M IV OPS 2  
KAYE 3   L L T 1   LICO 2   M J C 2  
KAYLIN 1   L M N 5   LIEBMAN-GIBSON 2   M J G 36  
KEAHEY 10   L M P 8   LIFESTYLE 19   M K 24  
KEARNEY 1   L N R 1   LIGHT 3   M K N 4  
KEATOR 1   L R F 1   LIGHTHOUSE 7   M L 1  
KEBO 155   L TEXAS 37   LIGHTNING 67   M L C 1  
KECK 4   L V O 1   Lignite 1   M L RESOURCES 5  
KEEHAN 2   L X EXPLORATION 1   LILES 1   M M C 2  
KEEL 1   LA CAMPBELL 3   LIMES 3   M P G 12  
KEEMAC 4   LA COASTAL 21   LIMESTONE 3   M P PETROLEUM 1  
KEENE 5   LA GLORIA 293   LINCOLN 2   M P S 74  
KEETON 1   LA GORCE 6   LINDA 1   M R EXPLORATION 1  
KEFT OIL 1   LA HOLLO 5   LINDEMUTH 1   M R T 1  
KEG 11   LA JET 4   LINDER 5   M W J 5  
KEGLEY 1   LA JITA 8   LINDHOLM 15   M W PETROLEUM 10  
KELJIKAN 4   LA JOLLA 4   LINGEN 22   M W R 1  
KELLER 2   LA JOYA 1   LINK 8   M-G GAS CO 1  
KELLEY 12   LA NELLE 2   LINK OIL &GAS 1   M-L INC. 2  
KELLY 31   LA PARITA 9   LINKENHOGER 1   M-TEX 7  
KELPETRO 8   LA PRYOR 2   LINNE 6   M-V 6  
KELSEY 21   LA ROCA RESOURCES 1   LION 14   MABEE 21  
KELSO 3   LA ROSA 16   LIPAN 2   MABRY 2  
KEMP 2   LA RUE 2   LIPSCOMB 9   MAC DRILLING 6  
KEMPER GLICK 1   LA SALLE 8   LISSIE 1   MAC'S DRILLING 5  
KEN 53   LA TERRE 3   LITTLE 69   MACDIARMID 1  
KEN-KAN 2   LAB OIL 21   LITTLE GIANT 4   MacDONALD 19  
KENDALL 7   LABELLE 3   LITTLEFIELD 2   MACEO 8  
KENERGY 3   LACAL 19   LITTLEPAGE 1   MACERO 23  
KENNARD 45   LACEY 19   LITTLETON 1   MACHII-ROSS 14  
KENNE 1   LACK 2   LIVE OAK 11   MACHIN 3  
KENNECOTT 1   LACY 46   LIVELY 45   MACK 3  
KENNEDY 9   LADD 133   LIVINGSTON 2   MACKEY 9  
KENNON 1   LAGARTO 1   LLOG 1   MACKHANK 55  
KENTEX 3   LAGERQUIST 4   LLOYD 8   MACLANE 1  
KENYON 16   LAGO 4   LOBAR 2   MACNAUGHTON 1  
KEPLEY 9   LAGUNA 1   LOBO 90   MACPET 17  
KEPLINGER 1   LAHOMA 1   LOCAL 10   MACQUEST 1  
KEPPLER 1   LAIN 1   LOCHRIDGE 2   MADDOX 2  
KERN 1   LAIRD 1   LOCKE 2   MADDUX 5  
KERNS 5   LAKE 11   LOCKHART 185   MADERA 8  
KERR-MCGEE 27   LAKE RONEL 14   LOCO 1   MADRID 17  
KEWANEE OIL 9   LAKEVIEW 1   LOFCO 2   MADRONE 3  
KEY 2   LAKEWOOD 14   LOFFLAND 9   MAER 1  
KEYSTONE 7   LAMMERTS 2   LOFLIN 3   MAGALIS 1  
KGMH 1   LAMONT 2   LOGUE 244   MAGEE 2  
KIBBE 17   LANCE 6   LOHMAN 1   MAGGERT 6  
KIDD 25   LAND RESOURCES 6   LOKEY 1   MAGNA 3  
KIEL 36   LANDA 1   LOMA ALTA 1   MAGNETIC 1  
KILGORE 37   LANDES 3   LOMA OIL 10   MAGNOLIA 1892  
KILGORE & ATLANTIC 1   LANDMARK 1   LOMA VERDE 1   MAGNUM 46  
KILGORE & COFFEE 1   LANDRESS 4   LOMAC 1   MAGUIRE 163  
KILGORE-TURNER 1   LANDRETH 9   LOMACK 1   MAIN 3  
KILLAM 945   LANDRUM 6   LOMAK 9   MAJESTIC 3  
KILLINGER 1   LANG 44   LONDON PETROLEUM 2   MAJO 3  
KILLINGSWORTH 1   LANGHAM 6   LONE OAK 3   MAJOR 15  
KILMARNOCK 2   LANIER 1   LONE STAR 315   MALLARD 7  
KILROY 170   LANKARD 1   LONG 29   MALLORY 1  
KIMBALL 3   LANN 2   LONG BROTHERS 8   MALOMAR 1  
KIMBARK 1   LANNING 3   LONG TRUSTS 1   MAN-GAS 2  
KIMBELL 2   LANNING-COFFIELD 1   LONGHORN 83   MANA 30  
KIMMEL 1   LANTANA 15   LOONEY 2   MANAHAN 7  
KIMMELL 5   LAPO 1   LOPEZ 1   MANCO 42  
KIMMEY 41   LARCO 2   LORDSTONE 1   MANDARIN 11  
KIN-ARK 2   LAREDO 2   LOS GATOS 17   MANECO 3  
KING 124   LAREDO ENERGY 4   LOS NIETOS 5   MANETAS 1  
KING-HOARD 1   LAREDO WATER WORKS 1   LOTT 1   MANFORTH 3  
KING-TEX 3   LARIO 10   LOUDON 13   MANFRED 11  
KINGDOOR 1   LARKINS 2   LOUIS DREYFUS 61   MANGES 45  
KINGWOOD 24   LAROCA 1   LOUISANA GAS 3   MANGUM 19  
KINLAW 4   LAROCA RESOURCES 4   LOUISANA LAND 1   MANLER 1  
KINLEY 2   LAROCO LLP 16   LOUISIANA CAMPBELL ENERGY 1   MANLEY 44  
KINNEAR 2   LARON 4   LOUISIANA GENERAL PETROLEUM 11   MANNING 12  
KINS 7   LARS 1   LOUISIANA LAND & EXPL 15   MANOR 10  
KINSEL 1   LARSEN 2   LOUISIANA NATURAL 1   MANRY 2  
KINSEY INTEREST 3   LARUE 2   LOUISIANA OIL REFINING 1   MANTI 51  
KIOWA 11   LAS TECAS 1   LOVE 6   MANTLE 1  
KIRBY 105   LASITER 1   LOVE & SUN 1   MAPCO 5  
KIRK 2   LASMO ENERGY 1   LOVELADY 57   MAPLES 1  
KIRKPATRICK 108   LATIMER 2   LOWE 16   MAR 4  
KIRKSMITH 4   LATTNER 12   LOWER COLORADO RIVER AUTHORITY 2   MAR-TEX 2  
KIRKWOOD 589   LAUGHLIN 41   LOWMAR 3   MARALO 6  
KIRKWOOD & MORGAN 1   LAUREL 8   LOWRANCE 1   MARAN 6  
KISSINGER 9   LAURITZEN 11   LU-TEX 4   MARATHON 75  
KLABZUBA 8   LAVACA 7   LUBBOCK COTTON 2   MARCELL 1  
KLEBERG 3   LAWBAR 44   LUCAS 1   MARCH 1  
KLEIN 1   LAWLER 2   LUCEY 6   MARDAM 13  
KLEINER 7   LAWLESS 9   LUCK PETROLEUM 1   MARGO 2  
KLING 14   LAWLOR 7   LUCKY 6   MARIAH 3  
KLOSTER 1   LAWRENCE 2   LUETH 1   MARINE 19  
KLOTZMAN 25   LAWSON 1   LUHN 1   MARINE GATHERING 2  
KNICKERBOCKER 1   LAY 2   LUKER 1   MARINO 6  
KNIGHT 3   LAYNE TEXAS 10   LULING 148   MARION 25  
KNOTT 1   LAZARUS 1   LULOC 2   MARK IV 43  
KNOX 2   LE CUNO 6   LUNDBERG 36   MARK PRODUCING 4  
KOBA 4   LEACH 7   LUNDELL 23   MARKHAM 1  
KOCH 1   LEAHY 4   LUNDELLS 22   MARKS 28  
KODIAK 2   LEAKE 1   LUNDIN 1   MARLAND 1  
KOENIG 2   LEAR 13   LURA 1   MARLEX 1  
KOLLMAN 1   LEARY 1   LUSK 2   MARLIN 5  
KOSAREK 6   LEATHERWOOD 1   LUSKEY 1   MARLINE 9  
KOSSA 1   LEBEN 1   LUTTES 1   MARMADUKE 6  
KOTTICK 1   LECHE 1   LYDA 1   MARQUEE 96  
KRAAK 2   LECUNO 2   LYLES 9    
KRAFTEX 2   LEDGE 1   LYMAN 88    
KRAGSETH 2   LEDLOW 2   LYMAN DAMASCUS 2    
KRASNER 7   LEE 62   LYMAN(TEXON) 1    
Operator Count   Operator Count   Operator Count   Operator Count  
MARR 4   MEANS 6   MONTGOMERY 3   NEUHAUS 79  
MARRIOTT 1   MEBANE 4   MOODY 19   NEUMANN 1  
MARSH 65   MECEY 1   MOORE 193   NEUMIN 145  
MARSHALL 55   MECO 8   MOORINGSPORT 5   NEW 1  
MARSTON 4   MECOM 90   MOOSE 27   NEW CENTURY 14  
MARTEX 4   MED-TEX 6   MORAN 56   NEW HORIZON 1  
MARTIN 192   MEDALLION 7   MORCO 3   NEW HORIZONS 1  
MARTIN-BAKER 3   MEDDERS 5   MORELAND 1   NEW SEVEN FALLS 5  
MARTINETS 1   MEEK 2   MOREOIL 1   NEW ULM 4  
MARTS 1   MEEKER 39   MORGAN 590   NEW-TEX 2  
MARYE 5   MEEKS 1   MORGAN-GULF 4   NEWFIELD 1  
MARYLAND 19   MEGA 1   MORLAS 1   NEWFIELD EXPLORATION 79  
MARZO 2   MEGAHAN 3   MORMAC 256   NEWGULF 2  
MASCOT 9   MEGO 2   MORRE 1   NEWHALL 2  
MASIRAN 2   MEJLAENDER 2   MORRIS 33   NEWITT 18  
MASON 26   MELBA 43   MORRISON 9   NEWMAN 188  
MASS ENERGY 1   MELLARD 1   MORROW 1   NEWMONT 3  
MASSENGILL 2   MELLON 32   MORSE 4   NEWPORT 4  
MASSEY 2   MELMERICH 1   MORSEY 10   NEWTON 55  
MASSINGILL 61   MELTON 2   MORTCO 1   NICCO 2  
MASTEN 2   MEMORIAL EXPLORATION 1   MORTEX 3   NICHOLLS 1  
MASTERSON 3   MENGDEN 28   MORTIMER 79   NICHOLS 7  
MATADOR 1   MENGER 1   MORTON 3   NICHOLSON 3  
MATAGORDA 12   MERCURY 16   MOSBACHER 243   NICKEL 1  
MATHEWS 3   MEREDITH 79   MOSELEY 21   NICKLOS 7  
MATHIS 1   MERIDIAN 63   MOSELLE 1   NIELSEN 4  
MATLOCK 2   MERIT 13   MOSS 29   NIMROD 1  
MATRIX 1   MERREN 2   MOSS & ADAMS 1   NIX 1  
MATTHEWS 4   MERRICK 28   MOSS & WATSON 4   NIXON 12  
MATTKE 1   MERRITT 13   MOSSER 81   NOACK 1  
MATZINGER 29   MERY 1   MOTCO 3   NOAKE 1  
MAUCH 1   MESA 37   MOTEX 43   NOBB 2  
MAUDLOWE 2   MESA CHICA 2   MOTI 1   NOBLE 38  
MAURER 1   MESQUITE 14   MOTT 6   NOBLESON 9  
MAVERICK 35   MESSENGER 1   MOULDEN 1   NOLA OIL & GAS 1  
MAXIMA 6   MESSER 15   MOULTON 7   NOLAN 1  
MAXUS 10   MESSERS CO. 4   MOUND 26   NOLEN 8  
MAXWELL 11   MESTENA 54   MOUNT 8   NOMECO 4  
MAY 36   METALS SERVICE 11   MOUNTAIN TOWNSITE 1   NOR-AM 4  
MAYAN 1   METANO ENERGY 6   MOWINCKLE 6   NOR-MAC-BURNS 1  
MAYCO 1   METCO 3   MOWINKLE 11   NORANDA 4  
MAYFAIR 53   METRO 1   MUDGE 5   NORBLA 1  
MAYFIELD 15   METROPOLITAN OIL 8   MUELLER 225   NORCEN 1  
MAYNARD 36   METTS 1   MUGG 1   NORCOFF 1  
MAYNE 4   MEYERS 27   MULE 2   NORCROSS 1  
MAYO 34   MIAMI 20   MULLE 3   NORDAN 22  
MAYS 1   MICHAEL 124   MULTI-ENERGY 1   NORDIC 2  
MAZURICK 1   MICHAUX 39   MULVER 1   NOREMAC 6  
McALESTER 13   MICHEL 2   MUNDY 1   NORINO 1  
McALISTER 1   MICHELSON 21   MUNN 1   NORMANDIE 5  
McALL 3   MID AMERICA 2   MUNSON 3   NORMANDY 14  
McALPIN 3   MID COAST 3   MURCHISON 20   NORRIS 20  
McBEE 13   MID CONTINENTAL 1   MURCO 1   NORSWORTHY 14  
McBRAYER 1   MID GULF 2   MURDICK 1   NORTEX 21  
McBRIDE 107   MID KANSAS 1   MUREXO 6   NORTH 2  
McCABE 56   MID-AMERICAN 24   MURLYNSON 9   NORTH AMERICAN 109  
McCAIN 1   MID-CENTURY 3   MUROC 1   NORTH CENTRAL 173  
McCALEB 15   MID-CONTINENT 25   MURPHEY 1   NORTH PADRE EXPL 2  
McCAMERON 1   MID-STATES 2   MURPHY 20   NORTH PETTUS 14  
McCAMEY 1   MID-TEXAS 7   MURRAY 25   NORTH ROSS OIL 1  
McCANDLESS 1   MIDAS 3   MURRELL 1   NORTH SHORE 7  
McCARRICK 56   MIDDLETON 10   MURRY 1   NORTH STAR 13  
McCARTER 38   MIDHURST 19   MUSS 5   NORTH TEXAS 5  
McCARTHY 96   MIDLAND 40   MUSSELMAN 29   NORTHERN MICHIGAN 7  
McCARTY 1   MIDSTATES 86   MUSTANG 69   NORTHERN NATURAL 10  
McCLAIN 71   MIDTEX 1   MUSTEEN 7   NORTHERN ORDINANCE 9  
McCLUNG 3   MIDWAY 26   MUTEX 1   NORTHERN PUMP 116  
McCOLLUM 7   MIDWEST 81   MUTUAL OIL 6   NORTHSTAR 3  
McCOMBS 8   MIERS 1   MYER 1   NORTHWEST ARKANSAS 1  
McCORD 43   MIHOVAL 1   MYERS 5   NORTHWEST OIL 4  
McCORMICK 172   MIKTON 3   N E G 6   NORTON 55  
McCRACKEN 2   MILAGRO 8   N F C PETROLEUM 1   NOUVELLE 1  
McCRIGHT 2   MILAM 14   N F OIL 1   NOVA ENERGY 2  
McCULLOCH 17   MILES 8   N G C ENERGY 1   NOVUS OIL 1  
McCULLOUGH 7   MILESTONE 22   N M-YATES 1   NOVUS OIL & GAS 1  
McCURDY 20   MILHAM 1   N P ENERGY TEXAS 12   NOYES 1  
McCUTCHIN 6   MILLER 304   N P U UNION PRODUCING 1   NU-ENAMEL 1  
MCDADE 1   MILLER & DONZIS 1   N R G 6   NU-SAN 5  
McDANIEL 4   MILLER & FOX 29   N R M 3   NUCORP 49  
McDANNALD 39   MILLER & PIERCE 25   N R M C 1   NUECES COMPANY 11  
McDERMOTT 37   MILLICAN 77   N S T 1   NUECES MINERALS 4  
McDONALD 23   MILLS 1   NAFCO 2   NUECES OIL 15  
McDONNOLD 2   MILLSAP 9   NAILS CREEK 1   NUECES RESERVES 2  
McDOUGAL 2   MILNER 7   NAIVAR 1   NUECES ROYALTY 7  
McDOWELL 3   MILO 1   NANJO 1   NUECO 1  
McDRILLING 2   MILTEX 5   NAPECO 9   NUEVE 13  
McELVAIN 8   MIM 11   NARECO 1   NUGENT 6  
McFADDEN 8   MIN-TEX 3   NARMCO 1   NUGGET 46  
McFADDIN 1   MINAHAN 1   NASA 1   NULL 87  
McFARLAND 38   MINDEN 8   NASH 2   NUTECH 1  
McFARLANE 33   MINER 14   NATIONAL ASSOCIATED 5   NUTEX 3  
MCGAHEY 1   MINERAL DEVELOPMENT 1   NATIONAL BULK 2   O G P OPERATING 7  
McGALLIARD 10   MINERAL PROJECTS 2   NATIONAL DRILLING 3   O H B 8  
McGARR 42   MINERAL RESOURCES 1   NATIONAL ENERGY 4   O K WELL SERVICE 2  
McGEHEE 1   MINERALS EXPLORATION 1   NATIONAL EXPLORATION 41   O S R 1  
McGLOTHLIN 1   MINERALS OF TEXAS 2   NATIONAL GULF 1   O'BRYNE 1  
McGOLDRICK 3   MINTON 4   NATIONAL INVESTOR 1   O'BYRNE 2  
McGORICK-SMITH 1   MINUTEMAN 1   NATIONAL OIL 29   O'CONNOR 4  
McGOWAN 12   MIRADA 4   NATIONAL ONSHORE 6   O'DONNELL 1  
McGREGOR 14   MIRAMAR 40   NATIONAL OPERATING 1   O'HERN 10  
McGUFFIN 10   MIRANDO CRUDE 1   NATIONAL PETROLEUM 5   O'HORNETT 4  
McGUIRE 1   MISSION 11   NATIONAL PIPE & SUPPLY 1   O'LEARY 2  
McHENRY 1   MISSION RIVER 6   NATIONAL RESOURCES 3   O'MEARA 1  
McHUGH 5   MITCHAMORE 7   NATOMAS 8   O'MELVENY 26  
McIVER 2   MITCHELL 231   NATURA ENERGY 2   O'NEAL 4  
McKAY 1   MIZEL 4   NATURAL ENERGY 7   O'NEAL-CHANCELLOR 1  
McKEE 2   MO-JON 9   NATURAL GAS 9   O'NEIL 2  
McKENZIE 24   MOBIL 544   NATURAL RESERVES 4   O'SULLIVAN 10  
McKINZIE 1   MOCKINGBIRD 1   NATURAL RESOURCES 16   O'TOOL 1  
McLAIN 5   MODE 1   NAUTILUS 3   O.I.L. ENERGY 5  
McLEAN 2   MODERN 55   NAVARRO 71   OAKLAND 1  
McLELLAND 1   MODESETT 3   NAVCO 1   OAKVILLE 2  
McLEOD 15   MOGFORD 1   NAVIAR 1   OAKWOOD 1  
McMAHON 37   MOGUL 2   NAVIDAD 4   OASIS PETROLEUM 1  
McMILLAN 1   MOHAWK 1   NAVILLUS 2   OATMAN 32  
McMORAN 150   MOHICAN 1