Operator List

Operators: 5799

Operator Count   Operator Count   Operator Count   Operator Count  
221   AMBASSADOR 20   ASCENT 5   BARRANCA 1  
5-D OPERATING 2   AMBERTON 4   ASHER 2   BARRETT 4  
A & A 3   AMBROSIA MINERALS 1   ASHFORD 15   BARRIER 7  
A & D EXPL 5   AMCOLE 2   ASHLAND 31   BARRY 28  
A & M 2   AMEND 7   ASHLEY 1   BARTELS 1  
A & R 2   AMERADA 282   ASHTOLA 6   BARTESSA 1  
A & T 15   AMERICAN AUSTRALIAN 1   ASPECT 6   BARTGIS 1  
A A A OPERATING 5   AMERICAN COASTAL 4   ASPEN 2   BARTH 1  
A C R 1   AMERICAN COMETRA 39   ASSOCIATED OIL 99   BARTHOLOMEW 1  
A K M 2   AMERICAN DELTA 9   ASTIN 1   BARTLE 3  
A M & R 3   AMERICAN DRILLING 7   ASTRO 4   BARTLETT 2  
A N R 8   AMERICAN ENERGY 16   ATAPCO 22   BASA RESOURCES 5  
A O E OPERATORS 1   AMERICAN EXPLORATION 17   ATASCA RESOURCES 2   BASELINE O & G 1  
A O P 9   AMERICAN FIRST ENERGY 1   ATASCO 10   BASIC EARTH SCIENCE 14  
A P D 8   AMERICAN HUNTER 1   ATASCOSA OIL & GAS 1   BASIC ENERGY 4  
A P I 2   AMERICAN INTERNATIONAL 19   ATASCOSA TRUST 1   BASIN 13  
A R P 1   AMERICAN LIBERTY 35   ATCHISON 3   BASOM 3  
A W P 12   AMERICAN NATURAL GAS 22   ATHENS 2   BASS 174  
A.T.O.P.P. 1   AMERICAN OPERATING 1   ATKINS & O'NEIL 4   BASTROP 4  
ABACO 10   AMERICAN PETROFINA 135   ATKINS MINERALS 2   BATEMAN 9  
ABBEVILLE 1   AMERICAN PETROLEUM 1   ATKINSON 18   BATES 4  
ABBOTT 10   AMERICAN PLASTI-PLATE 1   ATLANTIC 962   BATEX 3  
ABCO 12   AMERICAN PUBLIC ENERGY 4   ATLAS 4   BATON 4  
ABEL 31   AMERICAN QUASAR 12   ATOKA 1   BATTAILE & KNISELY 1  
ABER 2   AMERICAN REPUBLIC 31   ATTEBURY 2   BAUCHMAN 2  
ABERCROMBIE 100   AMERICAN SHORELINE 52   ATWOOD 19   BAUGH 1  
ABERNATHY 1   AMERICAN STANDARD 2   AUBURN 9   BAUMAN 3  
ABRAHAM 1   AMERICAN TEXAS 5   AUDAS 5   BAXTER 108  
ABRAXAS 98   AMERICAN TRADING 18   AUGUST 1   BAY CITY DRILLING 11  
ABSHER 3   AMERICO 4   AUGUSTA 1   BAY CITY REFINING 4  
ABSHIER 1   AMERICUS 1   AULD 20   BAY OIL 9  
AC EXPLORATION 3   AMERITEX 1   AURORA 5   BAY PRODUCTION 3  
ACCO 90   AMES 4   AUSTEX 1   BAY ROCK 77  
ACCUMULATIVE ROYALTY 2   AMEX SYSTEMS 1   AUSTIN 22   BAYNES 10  
ACHE 1   AMHERST 1   AUSTRA-TEX 7   BAYPORT 4  
ACHNING 7   AMIGO 2   AUSTRAL 93   BAYRIDGE 1  
ACIETEROS 5   AMIGOS 1   AUTREY 1   BAYSIDE 20  
ACME 3   AMINEX USA 1   AUTUMN 1   BAYSTAR 1  
ACOCK 48   AMINI 1   AV-TECH 1   BAYTEX OIL 32  
ACOCK/ANAQUA 27   AMINOIL 28   AVALANCHE 3   BEACH 15  
ACOMA 4   AMISTAD 2   AVERILL 46   BEACHAM 1  
ACORN 4   AMMAN & McNAB 2   AVERY 7   BEACON 15  
ADA 72   AMMCO 3   AWOEB 3   BEADLE 1  
ADAIR 2   AMMEX 15   AXEM 6   BEALL 3  
ADAMS 62   AMMONITE 4   AXIS 1   BEAMAN 5  
ADCO 3   AMOCO 310   AYERS 3   BEAMON 6  
ADCOCK 1   AMOY 10   AYERS & SWOPE 1   BEARD 15  
ADDINGTON 3   AMPAK 29   AYRES 13   BEASLEY 1  
ADELANTE 1   AMPECO 2   AZALEA 2   BEATY 1  
ADENA 2   AMPHION 1   AZAR 1   BEAUCHAMP 2  
ADKINS 1   AMPOLEX 1   AZMUTH 1   BECHTEL 1  
ADMIRAL 2   AMSLER 9   AZTEC 14   BECK 15  
ADOBE 26   AMUREX 1   AZUL 5   BECKER 32  
ADRIAN 1   ANADARKO 48   B & B 11   BECKHAM 2  
AEGEAN 7   ANAQUA 57   B & D 1   BECKMAN 8  
AEGIS 1   ANCIENT SEAS 1   B & E 1   BECO 2  
AERO COLOMA 1   ANCIRA 1   B & G 6   BEDWELL 16  
AFROMA 53   ANCON OIL 11   B & K 1   BEER 26  
AGCO 4   ANDERMAN 6   B & L 2   BEGEMAN 9  
AGOIL 33   ANDERSON 158   B & M 20   BEHEMOTH 4  
AGSCO 6   ANDERSON-PRICHARD 35   B & S 1   BEHRING 1  
AHERN 20   ANDOVER 7   B & W 1   BEL OIL 7  
AID 12   ANDRADE 34   B B L 3   BEL-POTA 3  
AIKMAN 13   ANDRAU 4   B B M 16   BELAIRE 1  
AKIN 3   ANDRAU-HADA 1   B D K 112   BELCHER 4  
AKRON 6   ANDREEN 2   B D PRODUCTION 31   BELCO 63  
ALABAMA MINERALS 1   ANDRES 2   B D R 3   BELGAM 8  
ALABLANCA 1   ANDRESS 38   B G EXPLORATION 1   BELL 25  
ALADDIN 2   ANDREWS 88   B H P 27   BELL & DANSFIELL 21  
ALAMO 41   ANDRUS 9   B H P PETROLEUM 1   BELL, JAY 1  
ALANCO 2   ANGEL LAND 2   B J B 15   BELL, KELLY 64  
ALANIZ 5   ANGELINA 3   B J OIL MANAGEMENT 1   BELLOWS 2  
ALASKA STEAMSHIP 129   ANGLO PRODUCTION 2   B M W RESOURCES 2   BELLWETHER 3  
ALASKA TEX 3   ANGLO-DUTCH 1   B N P 39   BELMONT 1  
ALBRECHT 4   ANGLO-NATIONAL 2   B P AMERICA 14   BENEDUM 11  
ALBRIGHT 2   ANHUR 5   B P L 1   BENEDUM-TREES 43  
ALCO DRILLING 16   ANISMAN 2   B P PRODUCTION 5   BENGAIL 3  
ALCO OIL 11   ANKENMAN 4   B S E PRODUCTION 5   BENGE 1  
ALCOA 88   ANN 1   B T 6   BENHAM 1  
ALCOR 2   ANSCHUTZ 51   B T A OIL 31   BENNETT 35  
ALCORN 16   ANSELMA 1   B W A B 1   BENNETT, MILLS 154  
ALECO 1   ANSTER 1   B Y S INC. 1   BENSON 13  
ALEXANDER 8   ANTARA 1   B-G OPERATING 1   BENTEX 6  
ALFORD 6   ANTARES 28   BABB 1   BENTON 1  
ALGORD 1   ANTEX 2   BACARISSE 1   BENTSEN 72  
ALICE 2   ANTLER 2   BAGDAD 3   BENZ 7  
ALICE OIL 1   APACHE 137   BAGNALL 1   BENZ-STODDARD 5  
ALKEK 45   APCO 2   BAHIA 30   BENZAQUIN 1  
ALL AM 5   APEX ENERGY 22   BAILEY 38   BEPCO 2  
ALLAUN 1   APEX OIL 4   BAINBRIDGE 2   BERENERGY 10  
ALLBRIGHT 1   APEXCO 5   BAKER 22   BERG 1  
ALLDAY 24   APOLLO 5   BAKKE 29   BERGMAN 37  
ALLEGRO 70   APPELL 247   BALBOA 2   BERING 32  
ALLEN 116   APPLE 1   BALD 2   BERKLEY 2  
ALLEN & MORRIS 5   APPLIED THERMAL 2   BALDRIDGE 163   BERKSHIRE 1  
ALLEN & SHUMATE 5   APPLING 1   BALLANFONTE 3   BERLY 1  
ALLERKAMP 10   AQUILA 6   BALLARD 46   BERNARD 1  
ALLIANCE 7   AQUITAINE 1   BALLENGEE 1   BERRY 3  
ALLIED DRILLING 6   ARANSAS 9   BALTIC 20   BERTELSON 1  
ALLIED HYDROCARBONS 2   ARAPAHO 1   BAM 2   BERTMAN 1  
ALLIED OIL 2   ARAXAS 3   BAMM 1   BEST 1  
ALLIED PRODUCTION 10   ARCADIA 10   BAMMERT 1   BETA 1  
ALLISON 7   ARCHER 6   BANCROFT 2   BETTIS 66  
ALLTEX 2   ARCO 351   BANDER 1   BEVERS 1  
ALMAC 8   ARENA 20   BANDERA 2   BEVLY 31  
ALMAR 3   ARENDALE & LOWE 3   BANKHEAD 17   BEXCO 19  
ALPHA ENERGY 1   ARGO 282   BANKLINE 7   BID-RICH 1  
ALPHA EXPLORATION 7   ARGOS 4   BANKS MILLER 3   BIG 6 DRILLING 47  
ALPHA GAS 8   ARGUS 3   BANNER 2   BIG CHIEF 2  
ALPHA OIL 2   ARGYLE 1   BANNON 2   BIG LAKE 5  
ALPHA OMEGA ENERGY 4   ARICK 1   BAR D 3   BIG SHELL 3  
ALPHA PRODUCTION 1   ARIES 1   BAR M 18   BIG SPRINGS 6  
ALSABROOK 2   ARK 15   BAR MAR 2   BIGHART 2  
ALSAN 2   ARKANSAS FUEL 251   BAR S 1   BIGHORN 1  
ALTA 1   ARKLA 7   BAR-MAC 1   BIGLANE 2  
ALTA ENERGY 2   ARLEDGE 11   BAR-MAR 1   BILBO 14  
ALTA MESA 6   ARMADA 4   BARBARA 16   BILLFISCH 4  
ALTA VISTA 13   ARMER 1   BARBEE 6   BILLINGS 9  
ALTEX 2   ARMOUR 40   BARBER 12   BINNEY 1  
ALTGELT 1   ARMOUR-RICHARDS 1   BARBRE 1   BINTLIFF 13  
ALUMINUM CO. OF AMERICA 174   ARMSTRONG 100   BARGE 1   BIRD 1  
ALWORTH 1   ARMSTRONG & HORN 11   BARGO ENERGY 1   BIRDWELL 59  
ALYANA 1   ARMSTRONG & SUTTON 19   BARIA 18   BISCO 1  
ALYNDSON 2   ARNOLD 26   BARKER 4   BISHOP 41  
AM-RDC 1   ARNOLD WELL SERVICE 95   BARNEBURG 10   BISKAMP 2  
AM-TEX 2   ARRIBA 46   BARNES 20   BISSETT 1  
AMAL 2   ARRINGTON 2   BARNETT 4   BITTNER 1  
AMALGAMATED 7   ARROW 31   BARNHART 8   BLACK 37  
AMAR 5   ARROWHEAD 2   BARNHILL 7   BLACK GOLD 2  
AMARCO 1   ARROYO 1   BARNSDALL 220    
AMAREX 1   ARSHT 1   BARNWELL 6    
AMARILLO 5   ARTZBERGER 1   BARON 5    
AMAX 26   ASAMERA 10   BARRACUDA 1    
Operator Count   Operator Count   Operator Count   Operator Count  
BLACK RIVER 4   BRIGHT 204   CAFRE 3   CHAMPLIN 381  
BLACK ROCK 9   BRILL 10   CAGE 8   CHANCE 3  
BLACKBRUSH 1   BRINKERHOFF 8   CAIN 26   CHANDLER 2  
BLACKFOOT 1   BRINKOETER 3   CAL MON 1   CHANOCO 29  
BLACKJACK 7   BRISCOE 22   CAL-TEX 3   CHAPARRAL 24  
BLACKMAR 2   BRISTOL 3   CALADONIA 1   CHAPARROSA 27  
BLACKWELL 1   BRISTON 1   CALAME 1   CHAPCO 1  
BLAFFER 5   BRISTOW 15   CALATEXIA 1   CHAPMAN 138  
BLAIR 25   BRITANCO 1   CALAWAY 16   CHARLTON 10  
BLAIR-VREELAND 193   BRITISH AMERICAN 62   CALCO 2   CHARO ENERGY 10  
BLAIRSVILLE 2   BRITISH TEXAN 8   CALDWELL 8   CHARRO 21  
BLAKE ENERGY 9   BRITTANY 1   CALHOUN 2   CHARTER 2  
BLALOCK 2   BROADHEAD 1   CALIBOGUE 2   CHASE 8  
BLANCHARD 21   BROADUS 6   CALIBRI 1   CHASS 25  
BLANCO 214   BROADWAY 1   CALIFORNIA CO. 12   CHASTAIN 1  
BLANKE 1   BROCATO 9   CALIFORNIA TIME 1   CHAVANNE 24  
BLANTON 6   BROCK 36   CALIFORNIA TIMES 3   CHENOWETH 1  
BLAZER 6   BROGAN 2   CALIX 1   CHEROKEE 8  
BLEAKLEY 14   BRONCO 2   CALLAHAN 2   CHEROSAGE 22  
BLEDSOE 2   BROOKLYN 9   CALLAWAY 17   CHERRY 7  
BLOCK 1   BROOKS 5   CALLENDER 2   CHERRYVILLE 31  
BLOCKER 46   BROONER 26   CALLERY 38   CHESAPEAKE 54  
BLOHM 6   BROSECO 13   CALLON 5   CHESNUTT 5  
BLOMGREN 3   BROWN 355   CALOHAN 11   CHESSER 1  
BLOUNT 18   BROWNING 8   CALPINE 2   CHESSHER 1  
BLUCHER 2   BRUMMETT 9   CALVERT 78   CHEVRON 115  
BLUCO 14   BRUNER 57   CAM CORP. 15   CHEYENNE 4  
BLUE JAY 8   BRUNO 3   CAMBELL 3   CHICAGO 350  
BLUE RIDGE 4   BRUNS 39   CAMBRIAN 1   CHICO OIL 1  
BLUE SKY 23   BRYAN 15   CAMBRIDGE 52   CHIEF 1  
BLUE WATER 3   BRYANT 40   CAMDEN 28   CHILDERS 10  
BLUE WING ENERGY 1   BUCHANAN 41   CAMERINA 3   CHILDRESS 1  
BLUEBONNET 3   BUCK 24   CAMERON 97   CHILES 76  
BLUERIDGE 3   BUCKALOO 9   CAMINO 12   CHILTIPIN 3  
BLUESTONE 2   BUCKINGHAM 13   CAMOIL 1   CHIODO 2  
BLUFF 2   BUCKLEY 7   CAMP 114   CHIPPEWA 1  
BLUHAWK 1   BUDA 2   CAMPANA 4   CHIQUITA 2  
BLUMBERG 10   BUELL 2   CAMPARIA 1   CHISHOLM 1  
BLUMENTHAL 1   BUESCHER 3   CAMPBELL 53   CHIZUM 26  
BLUTCH 2   BUETTNER 1   CAN-AM 1   CHOATE 2  
BOB'S SERVICE 1   BUFFALO 15   CANADIAN NORTHWEST 1   CHOCTAW 1  
BOCK 6   BUNN 12   CANALES 28   CHOICE 18  
BODE 2   BUNTE 10   CANKIE 1   CHOYA DRILLING 12  
BOEGENTER 1   BUNTIN 1   CANNAN, MORRIS 154   CHRISCO 1  
BOLDING 2   BUR-KAN 1   CANNAN-SUBSURFACE 1   CHRISTIAN 3  
BOLIN 10   BURCH 21   CANNON 11   CHRISTICO 31  
BOLING 8   BURDEN 1   CANNONBALL 2   CHRISTIE 116  
BOLLER 4   BURDETTE 1   CANTRELL 1   CHRISTILIN 2  
BOLLING 1   BURDITT 2   CANTRO 9   CHRISTINA 1  
BOLLMAN 1   BURFORD 2   CANUS 170   CHRISTOPHER 35  
BOLSA 1   BURK ROYALTY 69   CANUSA 4   CHUMNEY 1  
BOLTON 2   BURKART 1   CAPE 1   CHURCH 3  
BOMMER 18   BURKE 21   CAPITAL STAR 9   CICHOWSKI 4  
BONANZA 6   BURKHARDT 1   CAPITAN 1   CICO 102  
BONAVENTURE 5   BURKHART 6   CAPITOL 49   CIMAREX 4  
BOND, DURBIN 20   BURLESON 8   CAPITOL RESOURCES 5   CIMARRON 35  
BOND, ROLAND 4   BURLINGTON 5   CAPPS 2   CINCO 9  
BONNER 2   BURNAM 1   CAPRICORN 1   CIRCLE 20  
BONOIL 1   BURNELL 7   CAPRINA 5   CIRCLE 7 OIL & GAS 2  
BOONE 3   BURNETT 54   CAR-LOID 1   CIRCLE W 6  
BOOTH & HOLMAN 4   BURNS 217   CARAWAY 5   CIRRUS 2  
BOOTHE 1   BURR 9   CARBIDE 2   CITADEL 2  
BOPCO 2   BURROW 3   CARBONIT 1   CITATION OIL & GAS 12  
BORDER 49   BURSON 2   CARDEN 1   CITEX 1  
BOREN 3   BURTON 24   CARDOIL 1   CITIES PROD. 2  
BORNEFELD 1   BUSBY 4   CAREY 13   CITIES SERVICE 416  
BORSODI 4   BUSCHMAN 2   CARIBBEAN 21   CITY OF JOURDANTON WATER BOARD 1  
BOSS EXPLORATION 1   BUSMORE 14   CARIBOU 4   CITY PRODUCTS 1  
BOSTON 11   BUTCHER 34   CARL 65   CLA-BAR OIL 6  
BOTTOMS 1   BUTLER 74   CARLANDA 10   CLAN 1  
BOUNDS 1   BUTT 8   CARLEE 2   CLANTON 3  
BOUNTY 20   BUTTERCUP 1   CARLESS 4   CLARDY 18  
BOURNE 2   BUTTES 37   CARLON 12   CLARDY & BARNETT 1  
BOW 3   BUTTRAM 2   CARLOS 4   CLARK 246  
BOWDEN 1   BUZZINI 14   CARLSON 16   CLARKSON 2  
BOWEN 3   BYARS 8   CARLTON 3   CLARKWOOD 2  
BOWLES 22   BYER 1   CARNES 18   CLARY 1  
BOWLING 2   BYRD 11   CAROLINA 2   CLAY 7  
BOWMAN 4   BYS INCORPORATED 1   CAROLINA-TEXAS 2   CLAYTON 4  
BOWMAN CATTLE 14   C & E 161   CARPENTER 3   CLEAR FORK 2  
BOYCE 7   C & J 1   CARR 226   CLEARY 22  
BOYD & DURST 3   C & K 46   CARRIE 1   CLEGG 14  
BOYD & GALT 1   C & M 1   CARRILLO 1   CLEMCO 17  
BOYKIN 59   C & R 1   CARRIZO 31   CLEMENTS 10  
BOYLE 71   C A G 7   CARRL 223   CLEVA 2  
BOYSEN 34   C B & S 43   CARROLL 1   CLEVELAND 8  
BRACHMAN 1   C B ENERGY 4   CARTER 316   CLEVENGER 11  
BRACKEN 3   C B GATHERING 4   CARTHAY 22   CLIFFS DRILLING 1  
BRADBURY 1   C C LEASEHOLD 1   CARTTER 1   CLIFFWOOD 1  
BRADCO 19   C C M G 1   CARTWRIGHT 5   CLIMAX 3  
BRADEX 1   C C OPERATING 2   CASA GRANDE 2   CLINE 6  
BRADFORD 5   C D CONSULTING 3   CASCADE 3   CLINTON 48  
BRADLEY 1   C D E 3   CASCO 1   CLIPPER 1  
BRADSHAW 2   C D RESOURCES 11   CASE-POMEROY 1   CLOPTON 16  
BRADSTREET 1   C E T 3   CASEY 4   CLOUD 1  
BRADY 4   C G V 4   CASH 5   CLOVER 77  
BRAHANEY 2   C H & M 2   CASHCO 17   CLUCK 3  
BRAHMAN 8   C H F 1   CASHION 9   CLYMORE 20  
BRALORNE 1   C J D 2   CASKEY 10   COALINGA 2  
BRAMAN 66   C L F 1   CASKIDS 7   COAST CO. 18  
BRAMMER 14   C M & M 1   CASTLE 4   COASTAL BEND DRILLING 1  
BRANDON 8   C M & W 1   CASTLEMAN 1   COASTAL BEND OIL 17  
BRANHAM 15   C M C 6   CATAHOULA 4   COASTAL DRILLING & WORKOVER 5  
BRANN 1   C M L 1   CATARINA 3   COASTAL ENGINEERING 3  
BRANNON 3   C M OIL 3   CATER 2   COASTAL GULF 1  
BRANSON 1   C M S 1   CATLETT 88   COASTAL OIL & GAS 283  
BRASADA 1   C N 1   CATTLE LAND 56   COASTAL OIL & LAND 10  
BRASFIELD 1   C N G 15   CAUBLE 11   COASTAL PLAINS 5  
BRAUER 6   C N R 4   CAVALIER 2   COASTAL PRODUCTION 6  
BRAUN 21   C P C 72   CAVALLA 13   COASTAL REFINERIES 102  
BRAVADO 1   C P C DALE OPERATING 2   CAWTHON 3   COASTAL STATES 519  
BRAWLEY 1   C P X 25   CAYMAN 10   COASTAL TEX 1  
BRAYTON 79   C R A 5   CAYUGA 4   COASTAL TREND 66  
BRAZELL 5   C R B 24   CE-BETH 3   COASTAL WELL SERVICE 1  
BRAZOS 219   C R L 1   CEDAR HILL 1   COASTLAND 1  
BRAZOS OIL & GAS 19   C R M 2   CELERON 4   COASTLINE 68  
BREGMAN 2   C S A 9   CELTIC 1   COATES 266  
BREHM INVESTMENT 1   C S X 2   CENERGY 18   COATS 3  
BRELSFORD 2   C T OIL & GAS 1   CENIZA 32   COBBS 1  
BRENAN 4   C T R 3   CENTAUR 3   COBRA 28  
BRENNAN 2   C X Y ENERGY 3   CENTENNIAL 28   COCHRAN 40  
BRENT 2   C-AIR 2   CENTEX 3   COCKBURN 62  
BREUER 34   C-K RESOURCES 7   CENTRAL 33   COCKRELL 108  
BREWER 5   C-TECHNOLOGY 2   CENTURA 19   CODY 97  
BREWSTER 32   CABEZA 1   CENTURION 2   COE 1  
BRIAN 1   CABILDO 2   CENTURY 56   COFFEE 78  
BRIDAS 1   CABLE 1   CENZIA 1   COFFEY 11  
BRIDEWELL 31   CABOT 88   CERRO DE PASCO 11   COFFIELD 10  
BRIDGE 51   CABRE 1   CHALLENGE 5   COFFMAN 25  
BRIDGER 7   CACHARA 4   CHAMBERLAIN 13    
BRIDWELL 462   CACTUS 5   CHAMBERS 24    
BRIGGS 1   CADDO 102   CHAMBLISS 1    
BRIGHAM 54   CAESAR 2   CHAMPION 3    
Operator Count   Operator Count   Operator Count   Operator Count  
COGGINS 1   CRIPPLE CREEK 2   DELCAR 12   DUVAL OIL 45  
COHEN 5   CROCKET 1   DELEE 2   DUVAL PRODUCTION 11  
COHO 5   CROCKETT 7   DELFERN 2   DYAD 1  
COKE 1   CRON 24   DELHI 62   DYCO 2  
COKER 1   CROOM 1   DELHI-TAYLOR 128   DYNAMIC 73  
COKINOS 1   CROSBY, A. W. 3   DELK 1   DYONISIO 1  
COLBY 2   CROSS TIMBERS 1   DELKER 14   E & H 4  
COLE 22   CROUCH 52   DELLINGER 25   E & L 1  
COLEMAN 2   CROW 7   DELLWOOD 15   E C C 3  
COLETTO CREEK 1   CROWE 1   DELRAY 62   E E X 10  
COLGIN 1   CROWELL 1   DELTA AMERICAN 24   E K O 12  
COLINE OIL 1   CROWN 17   DELTA BRAVO 1   E M J 1  
COLLIER 16   CROWN CENTRAL 109   DELTA DRILLING 7   E O G RESOURCES 134  
COLLINS 41   CRUDE OIL 1   DELTA EXPLORATION 1   E P OPERATING 49  
COLLOM 1   CRUMP 3   DELTA GULF 24   E R I 11  
COLO 1   CRUTCHER 1   DELTA PETROLEUM 1   E S B E 1  
COLOBRI 2   CRUTCHFIELD 1   DELTA US 1   E-COR 3  
COLOGNE 35   CRUX 3   DENALI 2   E-G JOINT VENTURE 6  
COLOMA 55   CRYSTAL 41   DENISON 1   EADS 19  
COLONIAL 2   CUATRO 1   DENMAN 6   EAGLE 28  
COLONNADE 1   CUDE 21   DENNIS 9   EARTH SCIENCES 6  
COLORADO 57   CUELLAR 11   DENOVO 4   EASON 9  
COLSON 2   CUERO 1   DENTLER 1   EAST SIDE 2  
COLT 2   CULLEN 29   DENTON 1   EAST WEST INVESTMENT 1  
COLTON 30   CULLINAN 5   DENVER AMERICAN 3   EASTERN ENERGY 1  
COLUMBIA 45   CULOCO 1   DEROSSETT 5   EASTERN GAS 12  
COLUMBIAN 3   CULTON 16   DESANA 2   EASTERN OIL 1  
COLUMBUS 37   CULVER 1   DESCO 1   EASTERN STATES 6  
COLVIN 4   CUMEX 2   DEVEX 1   EASTERN TEXAS 3  
COMANCHE 16   CUMMINGS 9   DEVINE 5   EASTERWOOD 21  
COMBINED AMERICA 1   CUMMINS 74   DEVON 30   EATON 7  
COMBINED PRODUCING 1   CUMMINS & WALKER 126   DEVONIAN 3   EBERT 2  
COMBUSTION PRODUCTS 7   CUNNINGHAM 45   DEWALT 3   ECA HOLDINGS 1  
COMCO-CENTURION 1   CURRAN 1   DEWBRE 102   ECHO 1  
COMETRA 22   CURREY 3   DEWITT OIL & GAS 3   ECHOLS 51  
COMMERCE 2   CURRY 6   DIADEM 1   ECKERT 7  
COMMERCIAL 53   CUSACK 1   DIAMEX 8   ECKOLS 2  
COMMONWEALTH 14   CUTBIRTH 17   DIAMOND 40   ECLETO 1  
COMPASS 2   CXY ENERGY 1   DIAMOND SHAMROCK 3   EDCO 8  
COMPLETE OIL 4   CYCLOPS 2   DIASU 3   EDDY 33  
COMSTOCK 12   CYPRESS E & P 3   DICE 2   EDEN OIL 2  
CON-TEX OIL 1   CYPRUS 24   DICK 39   EDGAR 13  
CONCHO 11   CZAR 11   DICKSON 1   EDGE 112  
CONCORD 12   D & D 9   DIETERT 3   EDINBURG 1  
CONDRY 1   D & G 54   DIFFERENTIAL 1   EDISTO 1  
CONE 1   D & M 1   DILLARD 27   EDMISTON 4  
CONES 3   D A R T 3   DILLEY 45   EDMONT 1  
CONFEDERATE 10   D B O 5   DILLON 68   EDWARDS 71  
CONLEY 3   D C B OIL & GAS 1   DINERO 123   EGAN 35  
CONN 1   D D D ENERGY 1   DINN 1   EHMAN 1  
CONNER 1   D D G 31   DIRKS 103   EI-FEL 1  
CONOCO 359   D D OIL 1   DIRNETT 2   EICHER 6  
CONQUEST 19   D J EXPLORATION 1   DISCORBIS 45   EILAND 1  
CONROE 77   D K D 4   DISCOVERY 24   EKO 1  
CONROY 1   D K G 11   DISHMAN 3   EL CAMINO 1  
CONSERVATIVE OIL 15   D L B 1   DIVERSA 12   EL CHORRO 3  
CONSOLIDATED 131   D M C 1   DIXEL 15   EL DORADO 25  
CONSTANTIN 1   D M L 4   DIXIE 19   EL INDIO 1  
CONTINENTAL 1331   D R S 4   DIXILYN 2   EL PASO 107  
CONTINENTAL TREND RESOURCES 9   D S M OIL 2   DIXON 30   EL REGALO 3  
CONTRACT ENERGY 1   D V OIL 1   DOBBINS 3   EL REY PETROLEUM 2  
CONVEST 77   D Y EXPLORATION 3   DODGEN 1   EL RIO 1  
CONWAY 4   D'UNGER 5   DOHERTY 1   EL-TEX 3  
COOK 18   DABNEY 1   DOLCH 10   ELAM 2  
COOKE 2   DADE 1   DOLPHIN 2   ELAND 1  
COOLEY 1   DAIGEL 1   DOME 1   ELEANOR OIL 1  
COON 13   DAKAMONT 7   DOMESTIC FUELS 1   ELECTROSEIS 2  
COON-MURPHY 1   DAL-LONG 6   DOMINION 75   ELECTROTHERMIC 9  
COONRAD 5   DALE 46   DONICO 5   ELF AQUITAINE 4  
COOPER 7   DALECO 24   DONKIN 2   ELINOR OIL 1  
COPANO 25   DALEX 3   DONZIS 2   ELLEDGE 2  
COPETCO 3   DALLAS 10   DOOLEY 1   ELLIOTT 12  
COQUAT 131   DALPORT 23   DORADO 1   ELLISON 2  
COQUINA 21   DAMSON 41   DORAN 48   ELLOCO 1  
CORAL 12   DANCIGER 29   DORCHESTER 33   ELLSTROM 1  
CORDA 1   DANCO 1   DORFMAN 1   ELLSWORTH 107  
CORDELE 18   DANE 2   DORRANCE 9   ELMAX 1  
CORDELL 2   DANIEL 18   DORRIS 3   ELMER 1  
CORDER 1   DANIELS 3   DOSS 2   ELMONT 1  
CORDER, KNOX 3   DANIELSON 6   DOUBLE EAGLE 36   ELMS 3  
CORE EXPLORATION 3   DANMOR 1   DOUBLE J 2   ELTOBILT 1  
CORENERGY 5   DANOIL 3   DOUBLE PLAY 17   ELWOOD 1  
CORGEY 38   DANREY 5   DOUBLE S 1   ELY 2  
CORKILL 1   DANSFIELL 27   DOUBLE U 30   EMINENT 2  
CORLEY 16   DANT 2   DOUGHERTY 107   EMPIRE 5  
CORNELIUS 1   DANTEX 9   DOUGHTY 45   EMRY 1  
CORNELL 3   DANZIGER 1   DOUGLAS 120   ENCANA 1  
CORNERSTONE 2   DARBY 14   DOVRE 2   ENCINO 20  
CORNING 7   DARCY 3   DOW CHEMICALS 119   ENCINO ENERGY 1  
CORONADO 72   DARNER 11   DOWNEY 1   ENCO EXPLORATION 59  
CORPENING 15   DARROH 2   DOWNING 12   ENCON 5  
CORPUS CHRISTI CORPORATION 13   DARSEY 8   DOYLE 5   ENDEAVOUR 6  
CORPUS CHRISTI DRILLING 1   DASA 13   DOYNO 2   ENDERLI 1  
CORPUS CHRISTI EXPLORATION 5   DASH 9   DR. MC 1   ENDICOTT 3  
CORPUS CHRISTI LEASEHOLDS 12   DASKAM 2   DR. PEPPER BOTTLING CO. 1   ENDREX 4  
CORPUS CHRISTI MANAGEMENT 43   DAUBERT 197   DRAKE 5   ENDURO 1  
CORPUS CHRISTI OIL & GAS 163   DAUBES 2   DRAPER 14   ENERCO 4  
CORPUS CHRISTI REFINING 5   DAUCHY 50   DREXEL 9   ENERCORP 1  
CORRON 1   DAUGHERTY 7   DREYFUS 1   ENERGETICS 56  
CORRUM 1   DAUNTLAS 2   DRILLCO 3   ENERGEX 2  
CORSICANA 1   DAVACO 1   DRILLERS ENERGY 37   ENERGO 1  
CORUM 31   DAVENPORT 36   DRILLING & EXPLORATION 40   ENERGY 44  
CORY 2   DAVES 1   DRILLMAR 1   ENERGY DEVELOPMENT 86  
CORZELIUS 2   DAVIDOR 20   DRISCOLL 32   ENERGY ENTERPRISES 6  
COSDEN PETROLEUM 28   DAVIDSON 14   DRIVER 3   ENERGY EQUITY 1  
COSEKA 1   DAVIE 1   DRYER 1   ENERGY EXPLORATION 1  
COSMO 6   DAVIES 1   DUAL 1   ENERGY INTERNATIONAL 4  
COSNER 11   DAVIS 374   DUDLEY 1   ENERGY INVESTMENTS 6  
COSTA 4   DAVMOR 1   DUER-WAGNER 2   ENERGY PROJECTS 2  
COSTILLA 17   DAVOIL 1   DUFF 1   ENERGY RESERVES GROUP 26  
COTTON 104   DAWSON 51   DUGGER 68   ENERGY RESOURCES 9  
COTTONWOOD 33   DAY 1   DUKE 2   ENERGY SEARCH 2  
COUCH 4   DAYVAULT 1   DULANEY 124   ENERGY SOURCES 7  
COUGAR 6   DE SHANE 1   DULCE OIL 3   ENERGY TREATING 1  
COWAN 1   DEAN 16   DULUP 17   ENERGY UNLIMITED 5  
COWANCO 7   DeARMON 1   DUNBAR 5   ENERQUEST 1  
COWELL 1   DEBROW 1   DUNCAN 17   ENEX 2  
COX 893   DECKER 9   DUNHAM 4   ENEXCO 5  
COYLE 10   DECLEVA 6   DUNHILL 3   ENGELKE 93  
COYOTE TRUST 1   DEEP ROCK 32   DUNLAP 23   ENGEO 83  
CRAIG 2   DEEP SOUTH 6   DUNN 3   ENGLAND 1  
CRANFILL 2   DEERING 1   DUNNAM 2   ENGLE 1  
CRAWFORD 16   DEETER 20   DUNWOODY 16   ENGLISH 1  
CREDO 1   DeGRAZIER 2   DUPONT 3   ENHANCED ENERGY 1  
CREECH 1   DeGUIRE 8   DUQUESNE 1   ENI EXPLORATION 2  
CREIGHTON 3   DEICO 1   DURANGO 2   ENRE 22  
CRESCENT 30   DEKALB ENERGY 9   DURBIN BOND 9   ENRON 386  
CRESLENN 5   DEL MAR 22   DURBIN OIL 2   ENSCO 1  
CREST 32   DEL PETROLEUM 6   DURHAM 2   ENSERCH 52  
CRESTMONT 1   DELANEY 1   DURST 8    
CREWS 20   DELANGE 267   DUTY TOOL 3    
CRICKET 3   DELANO 1   DUVACO 1    
CRIMSON 3   DELAWARE 3   DUVAL COUNTY RANCH CO. 66    
Operator Count   Operator Count   Operator Count   Operator Count  
ENSIGN 1   FINGER 22   GABRIEL 2   GLENORA 4  
ENSOURCE 1   FINLEY 11   GAEA 1   GLENWAR 2  
ENSTAR 10   FINNEY 4   GAELIC 2   GLO CO. 1  
ENTERPRISE 28   FIRST ARANSAS 1   GAGE 1   GLOBAL 8  
ENTERPRISES 2   FIRST ENERGY 11   GAINCO 12   GLOBE OPERATING CO. 8  
ENTEX 19   FIRST MATAGORDA 5   GAINES 10   GLOVER 1  
EPCO 1   FIRST OIL 1   GAITHER 9   GLYNN-THOMPSON 1  
EPPLER 1   FIRST ROCK 6   GALATIA 2   GO ENERGY 2  
EQUINOX 1   FIRST UNITED 2   GALAXY 171   GO OIL 1  
EQUITABLE 12   FIRSTRIKE ENERGY 1   GALLAHER 7   GO-ENERGY 4  
EQUITX 7   FISCHER 80   GALLO DE CRISTAL 1   GO-TEX 8  
EQUITY 7   FISH 5   GALLOWAY 1   GODBOUT 1  
ERIN SOUTHWEST 1   FISHER 24   GALO ENERGY 6   GODSEY 11  
ERNEST 5   FISHER-WEBB 25   GALT 1   GOERNER 1  
ERSKINE 22   FITE 1   GALVEZ 1   GOETZ 8  
ERWIN 1   FITTIPALDO 1   GAMBLE 6   GOFORTH 2  
ESCOBA 1   FITZGERALD 9   GAMMA RESOURCES 3   GOHLKE 3  
ESCONDIDO 2   FITZPATRICK 67   GAMMETER 1   GOHLKE-BENGE 1  
ESENJAY 293   FIVE RESOURCES 6   GAR 4   GOLDEN 40  
ESGEN 2   FLAG-REDFERN 24   GAR-FLO 1   GOLDING 3  
ESPADA 3   FLAITZ 59   GARCIA 1   GOLDKING 244  
ESPERANZA 6   FLAMINGO 13   GARDESCU 1   GOLDMAN 1  
ESTES 2   FLANAGAN 2   GARDNER 35   GOLDRUS 23  
ESUNAS 5   FLARE 2   GARLAND 2   GOLDSMITH 6  
ESVES 1   FLASKE 1   GARLITZ 4   GOLDSTON 242  
ETHREDGE 2   FLEET 2   GARNER 1   GOLDSTRAND 1  
ETHYL 13   FLEMING 1   GARNETT 6   GOLIAD 34  
ETOCO 11   FLETCHER 7   GARR 2   GOLSON 1  
EUBANK 4   FLO-TEX 1   GARRETT 8   GOMA 2  
EUBANKS 3   FLOBOOTS 4   GARRISON 12   GOOD DAY 8  
EUGENE 9   FLORENCE 3   GARVEY 8   GOOD HOPE 147  
EURA B. OIL 1   FLORIDA 24   GARVIN 1   GOODALE 22  
EURATEX 2   FLOUR BLUFF 2   GARY 1   GOODELL 4  
EUREKA 1   FLOURNOY 231   GAS 2   GOODHUE 1  
EUROPEAN 18   FLOWERS 23   GAS PRODUCING ENTERPRISES 55   GOODRICH 13  
EVANS 55   FLOYD 2   GAS ROCK 5   GOODWIN 1  
EVCO 7   FLUSS 1   GASAWAY 1   GORDEN 1  
EVERBRIGHT 7   FLY 70   GASOLINE PRODUCTION 126   GORDON 12  
EVEREST 99   FLYING DIAMOND 2   GASPAR RICE 1   GORMAN 330  
EVERGREEN 22   FLYING W 1   GASPER RICE 34   GORUM 6  
EVERS 1   FLYNN 19   GASROCK 3   GOSE 137  
EVERSOLE 1   FOHS 13   GASTEX 1   GOTTLIEB 2  
EWING 4   FOHS & FOHS 1   GASTRANS 6   GOUGER 10  
EXCELSIOR 6   FOLWELL 3   GATES 2   GOULD 1  
EXETER OIL 17   FONTANA 10   GATHINGS 36   GOVERNMENT WELLS 24  
EXPANDO 67   FORAN 3   GATO 2   GRABOWSKI 5  
EXPEX 1   FORBES 2   GAUNTT 3   GRACE 72  
EXPLORATION 31   FORCE 4 ENERGY 1   GAUTREAUX 1   GRACEY 1  
EXPLORATION DRILLING 1   FORCENERGY 2   GAYLE 1   GRAGG 2  
EXPLORATION INVESTMENTS 1   FORD 121   GEDDIE 4   GRAHAM 369  
EXPLORATION, LTD 1   FOREE 4   GEE 1   GRAMAC 1  
EXPLORECO ENERGY 2   FORES 1   GEER 2   GRAMMAR 1  
EXPLORER 1   FOREST 379   GEIER-JACKSON 2   GRANDE 12  
EXPORT 8   FORESTER 5   GEISE 3   GRANDIN 1  
EXPRESS 2   FORETICH 1   GEISELMAN 15   GRANITE 4  
EXPRO 1   FORGOTSON 1   GEISER 52   GRANT 7  
EXSUN 32   FORMAN 2   GEM 8   GRARIDGE 21  
EXTEX 1   FORNEY 243   GEMACA 1   GRASTY 2  
EXXETER PETROLEUM 20   FORT APACHE 1   GEMARMI 2   GRAVIS 59  
EXXON 2067   FORT BEND 16   GEMINI 9   GRAWARD 1  
EZZELL 14   FORT WORTH 1   GENERAL AMERICAN OIL 18   GRAY 39  
F & B ENERGY 2   FORTENBERRY 6   GENERAL ATLANTIC 1   GRAY WOLFE 2  
F C D 3   FORTRESS MINERALS 4   GENERAL CRUDE 259   GRAYBURG 6  
F F A 2   FORTSON 1   GENERAL PETROLEUM 2   GREAT BASINS 13  
F G B 2   FORTUNE 1   GENERAL PROD. 7   GREAT EXPECTATION 2  
F-W OIL 1   FOSS 2   GENERAL WELL 3   GREAT LAKES 29  
FAGAN 5   FOSSIL BAY 5   GENESIS 136   GREAT NATIONAL 1  
FAGIN 1   FOSSIL EXPLORATION 19   GEO ENERGY 5   GREAT PLAINS 6  
FAIN 9   FOSTER 14   GEO EXPLORATION 3   GREAT SOUTHERN 2  
FAIR 199   FOUCH 1   GEO FOCUS 1   GREAT SOUTHWEST 1  
FAIRVIEW 1   FOUNDATION OIL 1   GEO-REEF 2   GREAT SOUTHWESTERN 1  
FAIRWAY 7   FOUNTAIN 8   GEO-SOURCE 1   GREAT STATES 3  
FAITH 1   FOUR STAR 1   GEOCHEMICAL 66   GREAT TEXAS 3  
FALCO 2   FOUR-B TRUST 31   GEODE 4   GREAT TEXAS CRUDE 23  
FALCON 57   FOURTEEN-HUNDRED CORPORATION 1   GEODOMINION PETROLEUM 43   GREAT WEST PET. 3  
FALCONE 1   FOWELL 1   GEODYNAMICS 72   GREAT WESTERN 14  
FALLEY 5   FOWLER 1   GEOGRAPHIC 1   GREATHOUSE 2  
FALLS 1   FOX 76   GEOLOGICAL RESEARCH 21   GREBIN 1  
FALLS CITY 1   FRANCIS 5   GEONATURAL RESOURCES 6   GREEHEY 2  
FAMCOR 10   FRANCITAS 13   GEOPHYSICAL 10   GREEN 11  
FANCHER 3   FRANK 1   GEORGE 8   GREENBRIAR 1  
FANION 2   FRANKE 2   GEOSEARCH 5   GREENBRIER 59  
FANSLER 1   FRANKEL 14   GEOSOUTHERN 7   GREENHILL 5  
FANT 1   FRANKFORT 15   GEOTEK 1   GREENWOOD 2  
FAR 3   FRANKLIN 26   GERALD 2   GREER 8  
FAR WEST 3   FRANKS 1   GERKER 1   GREGG 50  
FARAGSON 1   FRANZ 3   GERMANY 1   GRELLING 16  
FARENTHOLD 33   FRASER 7   GERNER 1   GRETA 6  
FARGASON 6   FRAZER 2   GERODETTI 1   GREY WOLF 6  
FARGO 34   FRAZIER 76   GERONIMO 40   GRIFFIN 5  
FARISH 3   FREDONIA 2   GERTEX 1   GRIFFITH 7  
FARMERS 1   FREEDMAN 13   GES 5   GRIMES 13  
FARMOR 2   FREEMAN 46   GETTY 262   GRIMM 6  
FARNEY 1   FREEPORT 1   GIBLIN 1   GRISHAM 1  
FARNSWORTH 3   FREER 3   GIBRALTAR 17   GRISINGER 1  
FARROW 1   FREMONT 10   GIBSON 20   GROFF 1  
FARSON 1   FRENCH OIL 28   GIDDENS 1   GROUP 9  
FASKEN 8   FRENCH, L.D. 1   GIDEON 2   GROVER 2  
FASSY 1   FRESNO 1   GIEBEL 2   GROVER-MCKINNEY 1  
FAULK 3   FRIDAY 5   GIERHART 38   GRUBB 48  
FAYE 1   FRIO 115   GIFFORD 8   GRUBBS 1  
FAYETTE COUNTY 4   FRIO-TEX 65   GILBERT 1   GRUBSTAKE 1  
FEAGIN 3   FROHNHOEFER 8   GILBREATH 2   GRUSS 2  
FEAZEL 1   FRONTIER PETROLEUM 17   GILCHRIST 1   GRUY 18  
FECH 1   FROST 62   GILCREASE 85   GUADALUPE 21  
FEDERAL INDUSTRIES 1   FRYER 1   GILGER 12   GUARANTY 3  
FEDERAL OIL 1   FULK 2   GILL 30   GUARDIAN 25  
FEDERAL ROYALTY 13   FULLER 52   GILLAND 1   GUENTHER 2  
FEE OIL & GAS 1   FULLERTON 5   GILLESPIE 39   GUERNSEY 18  
FEHLHABER 1   FULTON 4   GILLEY 1   GUEST 4  
FELAND 3   FUNDAMENTAL OIL 3   GILLIAM 1   GUFFEY 3  
FELDERHOFF 7   FURNELL 1   GILLILAND 1   GUIBERSON 2  
FELDMAN 20   FURSE 1   GILLOCK 1   GUILBAULT 1  
FELMONT 10   FUSON 1   GILLRING 107   GUINN 1  
FELTNER 5   FUTCH 1   GILMORE 1   GULF AMERICAN 16  
FENDER 8   FUTURE EXPLORATION 6   GILSTER 2   GULF BOARD OIL 22  
FENN 16   FUTURE PETROLEUM 4   GINCO 4   GULF CANADA 4  
FENNER 1   G & H 2   GINGER 3   GULF COAST 140  
FENSTERMAKER 1   G & M 3   GINTHER 169   GULF ENERGY 92  
FERGUSON 60   G & P 5   GISSEL 1   GULF INTERSTATE 11  
FERRIER 4   G & S 1   GIST 2   GULF LAKES 1  
FIDELITY 112   G A P 5   GIVENS 1   GULF MINERALS 34  
FIELD 9   G A S 11   GLACIER 86   GULF OIL 707  
FIELD DRILLING 2   G C E A 4   GLASCO 2   GULF PLAINS 29  
FIELDS 11   G D ENERGY 1   GLASS 1   GULF PROD. 7  
FIFTEEN 2   G D K 3   GLASSCOCK 354   GULF RESOURCES 3  
FIFTH ANDREWS 1   G E C 2   GLASSEL 2   GULF SANDS 126  
FIKES 3   G H J 4   GLAZIER 1   GULF SOUTH 12  
FILON 12   G H R 50   GLENCO 13   GULF STATES 52  
FINA 100   G L G ENERGY 8   GLENDA 10    
FINCH 2   G M T 1   GLENN 22    
FINDER 1   G S I 2   GLENN & ASSOCIATES 5    
FINE 1   G W R 2   GLENNCO 5    
Operator Count   Operator Count   Operator Count   Operator Count  
GULF STREAM 12   HASEMAN 1   HOME 22   INGRAM 1  
GULF TIDE 1   HASSELMAN 1   HONCHO 8   INLAND 32  
GULFBOARD 2   HAUSER 14   HONDO 2   INLAND EXPLORATION 1  
GULFCO 1   HAVENS 1   HONOLULU 1   INLAND OCEAN 51  
GULFPORT 2   HAWK 1   HOOD 2   INLAND PETROLEUM 2  
GULFSHORE 18   HAWKEYE 2   HOOKER 2   INMAN 1  
GULFSIDE 1   HAWKINS 115   HOOKS 2   INTEGRAL 100  
GULFSTAR 21   HAWLEY 76   HOOPER 3   INTEGRATED OPERATOR 3  
GULFSTREAM 25   HAWN 311   HOOVER 39   INTER-ALLIED 1  
GULFTON OIL 1   HAWORTH 2   HOPE 30   INTERCOASTAL 28  
GUM HOLLOW 1   HAWTHORN 6   HOPE HILL 1   INTERCONTINENTAL 3  
GURLEY 1   HAWTHORNE 6   HOPE PRODUCTION 1   INTERNATIONAL 12  
GUTHRIE 3   HAYDEN 11   HOPEHILL 7   INTERNATIONAL NUCLEAR 14  
GUTIERREZ 11   HAYES 10   HOPF 1   INTERNATIONAL OIL & GAS 14  
GYPSY 1   HAYNES 83   HOPI 3   INTERNATIONAL WESTERN 3  
H & H 3   HAYNESWORTH 1   HOPPER 1   INTERSTATE MINERALS 10  
H & H DEVELOPMENT 1   HAYPEC 7   HOPSON 10   INTEX 6  
H & H DRILLING 2   HAYS 20   HORIZON 5   INTRAMERICAN 11  
H & J DRILLING 258   HAZEL 2   HORMACHEA 1   INTREPID 6  
H & M 3   HAZELETT 4   HORN 100   INVESTEX 1  
H & N 1   HAZLITT 1   HORNADAY 2   INVESTMENT VENTURES 3  
H & R 1   HEAD 6   HORNBECK 2   INVESTORS NATURAL GAS 1  
H & S 10   HEAD & WELSH 34   HORNBERGER 5   INVESTORS SYNDICATE OF SOUTHWEST 8  
H & W 7   HEADINGTON 52   HORNE 3   INVINCIBLE 1  
H A J J 7   HEADWATERS 2   HORNER 2   IOWA-PAYNE 1  
H C M 2   HEARD 27   HORNSBY 1   IRBY 3  
H C W 3   HEARTLAND 3   HORRIGAN 4   IRENE 4  
H D & H 4   HEBERT 5   HORSTING 3   IRISH OIL 8  
H D C 1   HECAR 1   HORTON 2   IRVING 7  
H E & D 1   HEDGE 22   HORVATH MILLS 1   IRWIN 9  
H E A 1   HEDLEY 11   HOSKINS 15   ISBELL 1  
H E C I 13   HEDRICK 5   HOTCHKIN 19   IVEY TERRY 1  
H G I 3   HEEMANN 1   HOU-TEX 16   IVY 3  
H L B 1   HEEP OIL 166   HOUCHINS 1   J & C 59  
H M C 1   HEID 7   HOUGEN 1   J & D 2  
H M S 5   HEINZE 2   HOUGH 7   J & E 1  
H N G 184   HELDENFELS 14   HOUSE 1   J & J 1  
H O R 1   HELIS 6   HOUSER 27   J & M WELL SERVICE 14  
H P R 1   HELLAND 37   HOUSH 29   J & W OIL 1  
H R B OIL 2   HELMERICH 7   HOUSTON 9   J A H 72  
H R H 2   HELVETIA 2   HOUSTON DOMESTIC 4   J B H 1  
H S RESOURCES 4   HEMINGWAY 10   HOUSTON DRILLING 4   J B OIL & GAS 1  
H T H 1   HEMPHILL 1   HOUSTON ENERGY 3   J F D 3  
H V DRILLING 1   HENDERSON 24   HOUSTON EXPLORATION 44   J H 1  
H-M OIL 152   HENDRICKSON 2   HOUSTON GULF 53   J H I 1  
HAAS 204   HENNA 1   HOUSTON INDEPENDENT 1   J I L 5  
HABER 23   HENNIG 1   HOUSTON MINERAL 10   J J 1  
HABERLE 2   HENNINGER 1   HOUSTON NATURAL GAS 111   J J R S 1  
HADA 80   HENRY 30   HOUSTON OIL 411   J L RESOURCES 2  
HADEN 2   HENSCH 2   HOUSTON OIL & MINERALS 127   J M C RESOURCES 2  
HAGAN 6   HENSHAW 145   HOUSTON OIL FIELDS 6   J M G FINANCIAL 1  
HAGEN 39   HENSON 5   HOUSTON OIL WELL SERVICE 7   J M M ENERGY 3  
HAGEN-GREENBRIAR 1   HERCULES 8   HOUSTON OPERATING 3   J O C OIL 1  
HAGENS 11   HERD 2   HOUSTON PETROLEUM 24   J R B 1  
HAGGARD 1   HERITAGE 14   HOUSTON ROYALTY 33   J R G 24  
HAGGARTY 1   HERLION 7   HOWARD 39   J R OIL & GAS 1  
HAIL 5   HERNDEN 3   HOWELL 701   J S & P OPERATING 1  
HAILEY 14   HERNDON 16   HOWETH 154   J S PETROLEUM 2  
HAJECATE 3   HERRING 28   HOXSEY 12   J T R 3  
HALAMICEK 6   HERRINGTON 8   HRBUTZ 1   J W P EXPLORATION 1  
HALBOUTY 146   HERSCHAP 7   HUB CITY 1   J W R 12  
HALL 4   HERSCHBERGER 1   HUBBARD 4   J-3 OIL 52  
HALL-HOUSTON 9   HERTON 1   HUBBLE 10   J-O'B OPERATING 5  
HALLIBURTON 5   HERZSTEIN 1   HUBCO 2   J-W 41  
HALLMARK 5   HESTER 10   HUBER 94   J-WIL 2  
HALLS CREEK 1   HETCO 6   HUBER, J.H. 1   J.A.H 1  
HALLWOOD 5   HEWIT & DOUGHERTY 280   HUBER, J.M. 8   JACKSON 21  
HAMBLEN 1   HEWITT 49   HUDDLE 10   JACOB 1  
HAMBY 2   HEYNE 1   HUDGENS 4   JACOBS 14  
HAMCO 3   HEYSER 9   HUDGINS 13   JAD OIL 2  
HAMILL 211   HIAWATHA 230   HUDSON 22   JADE 6  
HAMILTON 88   HIAWATHA(HOLLIDAY) 2   HUENERS 1   JAMES ENERGY 1  
HAMM 6   HIBBERT 18   HUFF 2   JAMESON 2  
HAMMAN 139   HIBERNIA 1   HUFFCO 21   JAMEX 48  
HAMMAX 1   HICKEY 1   HUFFINGTON 21   JAMIN 15  
HAMMER 2   HICKOK 30   HUFFMAN 1   JANAN 10  
HAMMONDS 20   HICKS 10   HUGHES 854   JANCO 2  
HAMON 322   HIDALGO 3   HUGHEY 6   JANE OIL 1  
HAMPTON 3   HIDALGO-WILLACY 3   HUISACHE 108   JANEX 2  
HANCO OIL & GAS 1   HIGGINS 3   HULSEY 5   JARBE 1  
HANCOCK 8   HIGH ISLAND 6   HULVER 2   JARMAN 1  
HANCORP 1   HIGH PLAINS 10   HUMBLE 5448   JARMON 1  
HAND 2   HIGHLAND OIL 77   HUMPHERY 8   JARRELL 3  
HANEY 1   HIGHLAND RESOURCES 16   HUMPHRIES 16   JAY-DEE 21  
HANKAMER 66   HILBURN 2   HUNDRED 2   JAY-LIN 6  
HANKEY 4   HILCORP 23   HUNE 1   JAYCO 3  
HANNA 1   HILL 229   HUNT 474   JAYRED 2  
HANNAH 2   HILLCREST 26   HUNT HASSIE EXPL. 1   JEDCO 5  
HANOVER 14   HILLIARD 56   HUNTER 30   JEDSCO 1  
HANSLIP 5   HILLIER 59   HUNTINGTON 5   JEFFERS 1  
HANSON 380   HILLIN 1   HURBROUGH 8   JEFFERSON LAKE 25  
HANTHO-NELSON 1   HILLMAN 2   HURD 63   JEFFRIES 1  
HANTON 1   HILLSMAN 20   HURLBUT 22   JENKINS 4  
HARBERT 1   HILLSMAN-GREENBURG 1   HURLEY 4   JENNEY 3  
HARBOR 1   HILTY 18   HURT 3   JENNINGS 96  
HARDIE 1   HIME 1   HUSKY 23   JERCO 2  
HARDIN 11   HINDS 5   HUTCHINS 15   JERGINS 86  
HARDING 18   HINER 3   HUTSON 1   JERGINS OF TEXAS 5  
HARDWICK 28   HINES 4   HYDEN 3   JET 7  
HARDWICKE 10   HINKLE 24   HYDRO-CARBONS 10   JETCO 1  
HARDY 1   HINSON 15   HYDROCARBON EXPLORATION 1   JETSTREAM 1  
HARGEST 3   HINTON 16   HYDROCARBON GATHERING 14   JETTA 1  
HARGIS 9   HISTORICAL 2   HYDROCARBON HORIZONS 9   JIMCO 1  
HARGRAVE 27   HIXON 2   HYDROCARBON MGMT. 1   JOBST 4  
HARGROVE 4   HOBBY 4   HYDROCARBON OPERATING 6   JOCELYN 2  
HARING 130   HOBLITTZELLE 1   HYDROCARBON PROD 2   JOCELYN-VARN 58  
HARKEN 8   HOBLITZELLE 1   HYDROCARBON PROD. 17   JOHANSON 2  
HARKINS 592   HOBSCO 3   HYDROCARBON TRANSMISSION 1   JOHNSON 114  
HARLEY 3   HODGE 9   HYLAND 1   JOHNSTON 30  
HARMON 1   HODGES 1   HYNES 15   JOJON 1  
HARMONY 5   HOFFER 5   HYQUEST 64   JOLLEY 1  
HARPER 43   HOFFMAN 1   HYSO 1   JONES 156  
HARPER HEFTE 38   HOFHEINZ 1   HYTECH 13   JONES CREEK 1  
HARPER, SAM H. 1   HOGAN 5   I M C 4   JONNELL 25  
HARPER-SMITH 28   HOLBERT 1   I M E F 1   JORDAN 14  
HARRELL 50   HOLBROOK 5   I O C 8   JOSEY 59  
HARRELL & SOUTHWORTH 15   HOLCOMB 1   I O G 2   JOYCE 2  
HARRINGTON 2   HOLDEN 22   I P PETROLEUM 9   JOYCE & HILTY 16  
HARRIS 18   HOLEMAN 1   I T R 2   JUANITA 1  
HARRIS-FUNK 1   HOLIDAY RESOURCES 13   IBERIA 1   JUDARTH 2  
HARRISON 198   HOLLAND 93   ICARUS 6   JUDD 3  
HARRISON, DAN J., JR. 7   HOLLIDAY 7   IDAHO 3   JUPITER 15  
HARROB 1   HOLLIMON 47   ILLINOIS PETROLEUM 26   JUSTISS-WEARS 1  
HARROUN 2   HOLLIS 2   IMPACT 1   K & A 21  
HARRUS 6   HOLLOWAY 51   IMPERIAL 15   K & H 54  
HART 20   HOLLUB 26   INCA 22   K & K 2  
HARTEX 1   HOLLY 68   INCO 1   K & N 1  
HARTMAN 1   HOLMES 55   INDEPENDENCE 2   K & S 2  
HARVARD 2   HOLOTIK 2   INDEPENDENT 22   K B 34  
HARVEY 46   HOLT 2   INDEXGEO 41    
HARWOOD 48   HOLTZCLAW 1   INDIOLA 2    
HASBRO 1   HOMA 4   INDUSTRIAL 16    
HASCHKE 4   HOMABY 7   INEXCO OIL 89    
Operator Count   Operator Count   Operator Count   Operator Count  
K C 1   KODIAK 2   LEAHY 4   LUNDELL 23  
K C S 21   KOENIG 2   LEAKE 1   LUNDELLS 22  
K D ENERGY 1   KOLLMAN 1   LEAR 13   LUNDIN 1  
K L S 1   KOSAREK 6   LEARY 1   LURA 1  
K M D 2   KOSSA 1   LEATHERWOOD 1   LUSK 2  
K O G OPERATING 24   KOTTICK 1   LEBEN 1   LUSKEY 1  
K O T 1   KRAAK 2   LECHE 1   LUTTES 1  
K P EXPLORATION 13   KRAFTEX 2   LECUNO 2   LYDA 1  
K R M 18   KRAGSETH 2   LEDGE 1   LYLES 9  
K T X 4   KRASNER 7   LEDLOW 2   LYMAN 89  
K W B 1   KRAUSE 1   LEE 62   LYMAN DAMASCUS 2  
K-2 1   KRCHNAK 1   LEECO 1   LYMAN(TEXON) 1  
K-N OPERATING 6   KRENEK 2   LEEDE 7   LYMAN, C.V. 1  
KA-HUGH 24   KRESCENT 1   LEFEVRE 7   LYNAL 1  
KA-MATT 3   KRITI 1   LEGACY 51   LYNBROOK 4  
KADANE 1   KRUEGER 1   LEGEND 1   LYNCH 33  
KAISER OIL 12   KRUIDENIER 1   LEGER 12   LYNCO 3  
KAISER-FRANCIS 28   KRUSEN 1   LEHMERTZ 1   LYND 10  
KALER ENERGY 55   KRYSTAL-LIN 1   LEMARCO 17   LYNDEL 1  
KALLIES 1   KUBELA 1   LENSGRAF 1   LYNN 8  
KALLINA 44   KUEBLER 1   LENT 1   LYNTON 1  
KALON 1   KUENSTLER 8   LEONA 1   LYNX 4  
KALSEA 1   KUHNS 2   LEONARD 18   LYONS 51  
KAMLOK 10   KUMLER 10   LEONE 2   LYTLE CREEK 5  
KANE 3   KUNETKA 1   LEPOVITZ 1   M & B 5  
KANEB 2   KUYPCO 2   LERN 2   M & F D C 1  
KANELLOS 1   KUYPERS 13   LES TEXAS 1   M & G OPERATING 5  
KANSAS 1   KYLE 1   LESH 9   M & R EXPLORATION 1  
KARBUHN 2   L & A ENERGY 4   LESKO 1   M & S 1  
KARCHER 2   L & B OIL 12   LESS 1   M & W 15  
KARNCO 5   L & F 10   LEUSCHNER 1   M C A 19  
KARNES 3   L & L PETROLEUM 69   LEVERIDGE 6   M C O R 7  
KARSTEN 76   L & M 1   LEVINSON 1   M C OIL 9  
KASAN 2   L & T 1   LEVY 1   M C S 2  
KATE 1   L & W 2   LEWIS 196   M C Z 10  
KATZ 293   L B N 3   LEWIS PETRO 13   M G EXP 8  
KAULBACH 9   L G D C 7   LEXINGTON 2   M G F 60  
KAYE 3   L G J 4   LEY 13   M G U 2  
KAYLIN 1   L L T 1   LIBERTY 23   M H 2  
KEAHEY 10   L M N 5   LICO 2   M IV OPS 2  
KEARNEY 1   L M P 7   LIEBMAN-GIBSON 2   M J C 2  
KEATOR 1   L N R 1   LIFESTYLE 19   M J G 36  
KEBO 150   L R F 1   LIGHT 3   M K 24  
KECK 4   L TEXAS 37   LIGHTHOUSE 6   M K N 4  
KEEHAN 2   L V O 1   LIGHTNING 66   M L 1  
KEEL 1   L X EXPLORATION 1   Lignite 1   M L C 1  
KEEMAC 4   LA CAMPBELL 3   LILES 1   M L RESOURCES 5  
KEENE 5   LA COASTAL 21   LIMES 3   M M C 2  
KEETON 1   LA GLORIA 293   LIMESTONE 3   M P G 12  
KEFT OIL 1   LA GORCE 6   LINCOLN 2   M P PETROLEUM 1  
KEG 11   LA HOLLO 5   LINDA 1   M P S 74  
KEGLEY 1   LA JET 4   LINDEMUTH 1   M R EXPLORATION 1  
KELJIKAN 4   LA JITA 8   LINDER 5   M R T 1  
KELLER 2   LA JOLLA 4   LINDHOLM 15   M W J 5  
KELLEY 12   LA JOYA 1   LINGEN 22   M W PETROLEUM 10  
KELLY 31   LA NELLE 2   LINK 8   M W R 1  
KELPETRO 8   LA PARITA 9   LINK OIL &GAS 1   M-G GAS CO 1  
KELSEY 21   LA PRYOR 2   LINKENHOGER 1   M-L INC. 2  
KELSO 3   LA ROCA RESOURCES 1   LINNE 6   M-TEX 7  
KEMP 2   LA ROSA 16   LION 14   M-V 5  
KEMPER GLICK 1   LA RUE 2   LIPAN 2   MABEE 21  
KEN 53   LA SALLE 8   LIPSCOMB 9   MABRY 2  
KEN-KAN 2   LA TERRE 3   LISSIE 1   MAC DRILLING 6  
KENDALL 7   LAB OIL 21   LITTLE 69   MAC'S DRILLING 5  
KENERGY 3   LABELLE 3   LITTLE GIANT 4   MACDIARMID 1  
KENNARD 45   LACAL 19   LITTLEFIELD 2   MacDONALD 19  
KENNE 1   LACEY 19   LITTLEPAGE 1   MACEO 8  
KENNECOTT 1   LACK 2   LITTLETON 1   MACERO 23  
KENNEDY 9   LACY 46   LIVE OAK 10   MACHII-ROSS 14  
KENNON 1   LADD 133   LIVELY 45   MACHIN 3  
KENTEX 3   LAGARTO 1   LIVINGSTON 2   MACK 3  
KENYON 16   LAGERQUIST 4   LLOG 1   MACKEY 9  
KEPLEY 9   LAGO 4   LLOYD 8   MACKHANK 55  
KEPLINGER 1   LAGUNA 1   LOBAR 2   MACLANE 1  
KEPPLER 1   LAHOMA 1   LOBO 89   MACNAUGHTON 1  
KERN 1   LAIN 1   LOCAL 10   MACPET 17  
KERNS 3   LAIRD 1   LOCHRIDGE 2   MACQUEST 1  
KERR-MCGEE 22   LAKE 11   LOCKE 2   MADDOX 2  
KEWANEE OIL 9   LAKE RONEL 14   LOCKHART 185   MADDUX 5  
KEY 2   LAKEVIEW 1   LOCO 2   MADERA 8  
KEYSTONE 7   LAKEWOOD 13   LOFCO 2   MADRID 17  
KGMH 1   LAMMERTS 2   LOFFLAND 9   MADRONE 3  
KIBBE 17   LAMONT 2   LOFLIN 3   MAER 1  
KIDD 25   LANCE 6   LOGUE 243   MAGALIS 1  
KIEL 36   LAND RESOURCES 6   LOHMAN 1   MAGEE 2  
KILGORE 37   LANDA 1   LOKEY 1   MAGGERT 6  
KILGORE & ATLANTIC 1   LANDES 3   LOMA ALTA 1   MAGNA 3  
KILGORE & COFFEE 1   LANDMARK 1   LOMA OIL 10   MAGNETIC 1  
KILGORE-TURNER 1   LANDRESS 4   LOMA VERDE 1   MAGNOLIA 1894  
KILLAM 936   LANDRETH 9   LOMAC 1   MAGNUM 44  
KILLINGER 1   LANDRUM 6   LOMACK 1   MAGUIRE 161  
KILLINGSWORTH 1   LANG 44   LOMAK 8   MAIN 3  
KILMARNOCK 2   LANGHAM 6   LONDON PETROLEUM 2   MAJESTIC 3  
KILROY 166   LANIER 1   LONE OAK 2   MAJO 3  
KIMBALL 3   LANKARD 1   LONE STAR 315   MAJOR 15  
KIMBARK 1   LANN 2   LONG 29   MALLARD 7  
KIMBELL 2   LANNING 3   LONG BROTHERS 8   MALLORY 1  
KIMMEL 1   LANNING-COFFIELD 1   LONG TRUSTS 1   MALOMAR 1  
KIMMELL 5   LANTANA 15   LONGHORN 83   MAN-GAS 2  
KIMMEY 41   LAPO 1   LOONEY 2   MANA 30  
KIN-ARK 2   LARCO 2   LOPEZ 1   MANAHAN 7  
KING 123   LAREDO 2   LORDSTONE 1   MANCO 42  
KING-HOARD 1   LAREDO ENERGY 4   LOS GATOS 17   MANDARIN 9  
KING-TEX 3   LAREDO WATER WORKS 1   LOS NIETOS 5   MANECO 3  
KINGDOOR 1   LARIO 10   LOTT 1   MANETAS 1  
KINGWOOD 24   LARKINS 2   LOUDON 13   MANFORTH 3  
KINLAW 4   LAROCA 1   LOUIS DREYFUS 61   MANFRED 11  
KINLEY 2   LAROCA RESOURCES 4   LOUISANA GAS 3   MANGES 45  
KINNEAR 2   LAROCO LLP 16   LOUISANA LAND 1   MANGUM 18  
KINS 7   LARON 4   LOUISIANA CAMPBELL ENERGY 1   MANLER 1  
KINSEL 1   LARS 1   LOUISIANA GENERAL PETROLEUM 11   MANLEY 44  
KINSEY INTEREST 3   LARSEN 2   LOUISIANA LAND & EXPL 15   MANNING 12  
KIOWA 11   LARUE 2   LOUISIANA NATURAL 1   MANOR 10  
KIRBY 105   LAS TECAS 1   LOUISIANA OIL REFINING 1   MANRY 2  
KIRK 2   LASITER 1   LOVE 6   MANTI 43  
KIRKPATRICK 108   LASMO ENERGY 1   LOVE & SUN 1   MANTLE 1  
KIRKSMITH 4   LATIMER 2   LOVELADY 57   MAPCO 5  
KIRKWOOD 589   LATTNER 12   LOWE 16   MAPLES 1  
KIRKWOOD & MORGAN 1   LAUGHLIN 41   LOWER COLORADO RIVER AUTHORITY 2   MAR 4  
KISSINGER 9   LAUREL 8   LOWMAR 3   MAR-TEX 2  
KLABZUBA 8   LAURITZEN 11   LOWRANCE 1   MARALO 6  
KLEBERG 3   LAVACA 7   LU-TEX 4   MARAN 6  
KLEIN 1   LAWBAR 44   LUBBOCK COTTON 2   MARATHON 75  
KLEINER 7   LAWLER 2   LUCAS 1   MARCELL 1  
KLING 14   LAWLESS 9   LUCEY 6   MARCH 1  
KLOSTER 1   LAWLOR 7   LUCK PETROLEUM 1   MARDAM 13  
KLOTZMAN 25   LAWRENCE 2   LUCKY 6   MARGO 2  
KNICKERBOCKER 1   LAWSON 1   LUETH 1   MARIAH 3  
KNIGHT 3   LAY 2   LUHN 1   MARINE 19  
KNOTT 1   LAYNE TEXAS 10   LUKER 1    
KNOX 2   LAZARUS 1   LULING 148    
KOBA 4   LE CUNO 6   LULOC 2    
KOCH 1   LEACH 7   LUNDBERG 36    
Operator Count   Operator Count   Operator Count   Operator Count  
MARINE GATHERING 2   McNEILL 2   MONCRIEF 16   NEILL 2  
MARINO 6   McOIL 1   MONCUS 1   NEILSON 9  
MARION 25   McPETERS 1   MONDAY 51   NELMS 2  
MARK IV 43   McQUEEN 1   MONGOOSE 9   NELSON 66  
MARK PRODUCING 4   McRAE 12   MONITOU 1   NEOSHO 2  
MARKHAM 1   McRAE-FLEMING 1   MONROE 11   NESRAL 1  
MARKS 28   McROREY 3   MONSANTO 145   NESSLY 5  
MARLAND 1   McSPADDEN 13   MONTE 1   NETH 1  
MARLEX 1   McWILLIAMS 5   MONTE CHRISTO 3   NETH & SCHORSCH 1  
MARLIN 5   McWOOD 2   MONTECITO 1   NETHERLAND 1  
MARLINE 9   MEAD 2   MONTEGO 9   NETTLECOMBE 1  
MARMADUKE 6   MEADERS 2   MONTEREY 14   NEUHAUS 79  
MARQUEE 85   MEADOW VIEW 2   MONTERREY 35   NEUMANN 1  
MARR 4   MEANS 5   MONTGOMERY 3   NEUMIN 143  
MARRIOTT 1   MEBANE 4   MOODY 19   NEW 1  
MARSH 65   MECEY 1   MOORE 192   NEW CENTURY 13  
MARSHALL 55   MECO 8   MOORINGSPORT 5   NEW HORIZON 1  
MARSTON 4   MECOM 90   MOOSE 27   NEW HORIZONS 1  
MARTEX 4   MED-TEX 6   MORAN 56   NEW SEVEN FALLS 5  
MARTIN 192   MEDALLION 7   MORCO 3   NEW ULM 4  
MARTIN-BAKER 3   MEDDERS 5   MORELAND 1   NEW-TEX 2  
MARTINETS 1   MEEK 2   MOREOIL 1   NEWFIELD EXPLORATION 79  
MARTS 1   MEEKER 38   MORGAN 591   NEWHALL 2  
MARYE 5   MEEKS 1   MORGAN-GULF 4   NEWITT 18  
MARYLAND 19   MEGA 1   MORLAS 1   NEWMAN 188  
MARZO 2   MEGAHAN 3   MORMAC 256   NEWMONT 3  
MASCOT 8   MEGO 2   MORRE 1   NEWPORT 4  
MASIRAN 2   MEJLAENDER 2   MORRIS 33   NEWTON 55  
MASON 26   MELBA 43   MORRISON 9   NICCO 2  
MASS ENERGY 1   MELLARD 1   MORROW 1   NICHOLLS 1  
MASSENGILL 2   MELLON 32   MORSE 4   NICHOLS 7  
MASSEY 2   MELMERICH 1   MORSEY 8   NICHOLSON 3  
MASSINGILL 57   MELTON 2   MORTCO 1   NICKEL 1  
MASTEN 2   MEMORIAL EXPLORATION 1   MORTEX 3   NICKLOS 7  
MASTERSON 3   MENGDEN 28   MORTIMER 75   NIELSEN 4  
MATADOR 1   MENGER 1   MORTON 3   NIMROD 1  
MATAGORDA 12   MERCURY 16   MOSBACHER 241   NIX 1  
MATHEWS 3   MEREDITH 79   MOSELEY 21   NIXON 12  
MATHIS 1   MERIDIAN 63   MOSELLE 1   NOACK 1  
MATLOCK 2   MERIT 12   MOSS 29   NOAKE 1  
MATRIX 1   MERREN 2   MOSS & ADAMS 1   NOBB 2  
MATTHEWS 4   MERRICK 28   MOSS & WATSON 4   NOBLE 38  
MATZINGER 29   MERRITT 13   MOSSER 81   NOBLESON 9  
MAUCH 1   MERY 1   MOTCO 3   NOLA OIL & GAS 1  
MAUDLOWE 1   MESA 37   MOTEX 41   NOLAN 1  
MAURER 1   MESA CHICA 2   MOTI 1   NOLEN 8  
MAVERICK 34   MESQUITE 14   MOTT 6   NOMECO 4  
MAXIMA 6   MESSENGER 1   MOULDEN 1   NOR-AM 4  
MAXUS 10   MESSER 15   MOULTON 7   NOR-MAC-BURNS 1  
MAXWELL 12   MESSERS CO. 4   MOUND 26   NORANDA 4  
MAY 36   MESTENA 52   MOUNT 8   NORBLA 1  
MAYAN 1   METALS SERVICE 11   MOUNTAIN TOWNSITE 1   NORCEN 1  
MAYCO 1   METANO ENERGY 5   MOWINCKLE 6   NORCOFF 1  
MAYFAIR 53   METCO 3   MOWINKLE 11   NORCROSS 1  
MAYFIELD 15   METRO 1   MUDGE 5   NORDAN 22  
MAYNARD 36   METROPOLITAN OIL 8   MUELLER 224   NORDIC 2  
MAYNE 4   METTS 1   MUGG 1   NOREMAC 6  
MAYO 34   MEYERS 27   MULE 2   NORINO 1  
MAYS 1   MIAMI 20   MULLE 3   NORMANDIE 5  
MAZURICK 1   MICHAEL 124   MULTI-ENERGY 1   NORMANDY 14  
McALESTER 11   MICHAUX 39   MULVER 1   NORRIS 20  
McALISTER 1   MICHEL 2   MUNDY 1   NORSWORTHY 14  
McALL 3   MICHELSON 21   MUNN 1   NORTEX 21  
McALPIN 3   MID AMERICA 2   MUNSON 3   NORTH 2  
McBEE 13   MID COAST 3   MURCHISON 20   NORTH AMERICAN 109  
McBRAYER 1   MID CONTINENTAL 1   MURCO 1   NORTH CENTRAL 172  
McBRIDE 107   MID GULF 2   MURDICK 1   NORTH PADRE EXPL 2  
McCABE 56   MID KANSAS 1   MUREXO 6   NORTH PETTUS 14  
McCAIN 1   MID-AMERICAN 24   MURLYNSON 9   NORTH ROSS OIL 1  
McCALEB 15   MID-CENTURY 3   MUROC 1   NORTH SHORE 7  
McCAMERON 1   MID-CONTINENT 25   MURPHEY 1   NORTH STAR 13  
McCAMEY 1   MID-STATES 2   MURPHY 20   NORTH TEXAS 5  
McCANDLESS 1   MID-TEXAS 7   MURRAY 25   NORTHERN MICHIGAN 7  
McCARRICK 56   MIDAS 3   MURRELL 1   NORTHERN NATURAL 10  
McCARTER 38   MIDDLETON 10   MURRY 1   NORTHERN ORDINANCE 9  
McCARTHY 95   MIDHURST 19   MUSS 5   NORTHERN PUMP 116  
McCARTY 1   MIDLAND 40   MUSSELMAN 29   NORTHSTAR 3  
McCLAIN 71   MIDSTATES 86   MUSTANG 65   NORTHWEST ARKANSAS 1  
McCLUNG 3   MIDTEX 1   MUSTEEN 7   NORTHWEST OIL 3  
McCOLLUM 7   MIDWAY 26   MUTEX 1   NORTON 55  
McCOMBS 8   MIDWEST 80   MUTUAL OIL 6   NOUVELLE 1  
McCORD 43   MIERS 1   MYER 1   NOVA ENERGY 2  
McCORMICK 172   MIHOVAL 1   MYERS 5   NOVUS OIL 1  
McCRACKEN 2   MIKTON 3   N E G 6   NOVUS OIL & GAS 1  
McCRIGHT 2   MILAGRO 8   N F C PETROLEUM 1   NOYES 1  
McCULLOCH 17   MILAM 14   N F OIL 1   NU-ENAMEL 1  
McCULLOUGH 7   MILES 8   N G C ENERGY 1   NU-SAN 5  
McCURDY 20   MILESTONE 22   N M-YATES 1   NUCORP 49  
McCUTCHIN 6   MILHAM 1   N P ENERGY TEXAS 12   NUECES COMPANY 11  
MCDADE 1   MILLER 304   N P U UNION PRODUCING 1   NUECES MINERALS 4  
McDANIEL 4   MILLER & DONZIS 1   N R G 6   NUECES OIL 14  
McDANNALD 39   MILLER & FOX 29   N R M 3   NUECES RESERVES 2  
McDERMOTT 37   MILLER & PIERCE 25   N R M C 1   NUECES ROYALTY 7  
McDONALD 23   MILLICAN 77   N S T 1   NUECO 1  
McDONNOLD 2   MILLS 1   NAFCO 1   NUEVE 13  
McDOUGAL 2   MILLSAP 9   NAILS CREEK 1   NUGENT 6  
McDOWELL 3   MILNER 7   NANJO 1   NUGGET 46  
McDRILLING 2   MILO 1   NAPECO 9   NULL 87  
McELVAIN 8   MILTEX 5   NARECO 1   NUTECH 1  
McFADDEN 8   MIM 11   NARMCO 1   NUTEX 3  
McFADDIN 1   MIN-TEX 3   NASA 1   O G P OPERATING 7  
McFARLAND 38   MINAHAN 1   NASH 2   O H B 8  
McFARLANE 33   MINDEN 8   NATIONAL ASSOCIATED 5   O K WELL SERVICE 2  
MCGAHEY 1   MINER 14   NATIONAL BULK 2   O S R 1  
McGALLIARD 10   MINERAL DEVELOPMENT 1   NATIONAL DRILLING 3   O'BRYNE 1  
McGARR 42   MINERAL PROJECTS 2   NATIONAL ENERGY 4   O'BYRNE 2  
McGEHEE 1   MINERAL RESOURCES 1   NATIONAL EXPLORATION 41   O'CONNOR 4  
McGLOTHLIN 1   MINERALS EXPLORATION 1   NATIONAL GULF 1   O'DONNELL 1  
McGOLDRICK 3   MINERALS OF TEXAS 2   NATIONAL INVESTOR 1   O'HERN 10  
McGORICK-SMITH 1   MINTON 4   NATIONAL OIL 29   O'HORNETT 4  
McGOWAN 12   MINUTEMAN 1   NATIONAL ONSHORE 6   O'LEARY 2  
McGREGOR 14   MIRADA 4   NATIONAL OPERATING 1   O'MEARA 1  
McGUFFIN 10   MIRAMAR 40   NATIONAL PETROLEUM 5   O'MELVENY 26  
McGUIRE 1   MIRANDO CRUDE 1   NATIONAL PIPE & SUPPLY 1   O'NEAL 4  
McHENRY 1   MISSION 11   NATIONAL RESOURCES 3   O'NEAL-CHANCELLOR 1  
McHUGH 5   MISSION RIVER 6   NATOMAS 8   O'NEIL 2  
McIVER 2   MITCHAMORE 7   NATURA ENERGY 2   O'SULLIVAN 10  
McKAY 1   MITCHELL 223   NATURAL ENERGY 7   O'TOOL 1  
McKEE 2   MIZEL 4   NATURAL GAS 9   O.I.L. ENERGY 5  
McKENZIE 24   MO-JON 9   NATURAL RESERVES 4   OAKLAND 1  
McKINZIE 1   MOBIL 536   NATURAL RESOURCES 16   OAKVILLE 2  
McLAIN 5   MOCKINGBIRD 1   NAUTILUS</