Operator List

Operators: 5864

Operator Count   Operator Count   Operator Count   Operator Count  
250   AMAX 26   ASHER 2   BARRIER 7  
5-D OPERATING 2   AMBASSADOR 20   ASHFORD 15   BARRY 28  
A & A 3   AMBERTON 4   ASHLAND 31   BARTELS 1  
A & D 1   AMBROSIA MINERALS 1   ASHLEY 1   BARTESSA 1  
A & D EXPL 5   AMCOLE 2   ASHTOLA 6   BARTGIS 1  
A & M 2   AMEND 7   ASPECT 6   BARTH 1  
A & R 2   AMERADA 284   ASPEN 2   BARTHOLOMEW 1  
A & T 15   AMERICAN AUSTRALIAN 1   ASSOCIATED OIL 98   BARTLE 3  
A A A OPERATING 5   AMERICAN COASTAL 4   ASTIN 1   BARTLE & BARTLE 1  
A C R 1   AMERICAN COMETRA 39   ASTRO 4   BARTLETT 2  
A K M 2   AMERICAN DELTA 9   ATAPCO 22   BASA RESOURCES 5  
A M & R 3   AMERICAN DRILLING 7   ATASCA RESOURCES 2   BASELINE O & G 1  
A N R 8   AMERICAN ENERGY 17   ATASCO 10   BASIC EARTH SCIENCE 14  
A O E OPERATORS 2   AMERICAN EXPLORATION 17   ATASCOSA OIL & GAS 1   BASIC ENERGY 4  
A O P 9   AMERICAN FIRST ENERGY 1   ATASCOSA TRUST 1   BASIN 13  
A P D 9   AMERICAN HUNTER 1   ATCHISON 3   BASOM 3  
A P I 2   AMERICAN INTERNATIONAL 19   ATHENS 2   BASS 175  
A R P 1   AMERICAN LIBERTY 36   ATKINS & O'NEIL 4   BASTROP 4  
A W P 13   AMERICAN NATURAL GAS 22   ATKINS MINERALS 2   BATEMAN 9  
A.T.O.P.P. 1   AMERICAN OPERATING 1   ATKINSON 18   BATES 4  
ABACO 12   AMERICAN PETROFINA 136   ATLANTIC 961   BATEX 3  
ABBEVILLE 1   AMERICAN PETROLEUM 1   ATLAS 4   BATON 4  
ABBOTT 10   AMERICAN PLASTI-PLATE 1   ATOKA 1   BATTAILE & KNISELY 1  
ABCO 12   AMERICAN PUBLIC ENERGY 4   ATTEBURY 2   BAUCHMAN 2  
ABEL 34   AMERICAN QUASAR 12   ATWOOD 21   BAUGH 1  
ABER 2   AMERICAN REPUBLIC 31   AUBURN 9   BAUMAN 3  
ABERCROMBIE 100   AMERICAN SHORELINE 54   AUDAS 5   BAXTER 108  
ABERNATHY 1   AMERICAN STANDARD 2   AUGUST 1   BAY CITY DRILLING 11  
ABRAHAM 1   AMERICAN TEXAS 5   AUGUSTA 1   BAY CITY REFINING 4  
ABRAXAS 101   AMERICAN TRADING 18   AULD 20   BAY OIL 9  
ABSHER 3   AMERICO 4   AURORA 12   BAY PRODUCTION 3  
ABSHIER 1   AMERICUS 1   AUSTEX 1   BAY ROCK 78  
AC EXPLORATION 3   AMERITEX 1   AUSTIN 24   BAYNES 10  
ACCO 91   AMES 4   AUSTRA-TEX 7   BAYPORT 4  
ACCUMULATIVE ROYALTY 2   AMEX SYSTEMS 1   AUSTRAL 93   BAYRIDGE 1  
ACHE 1   AMHERST 1   AUTREY 1   BAYSIDE 20  
ACHNING 7   AMIGO 2   AUTUMN 1   BAYSTAR 1  
ACIETEROS 5   AMIGOS 1   AV-TECH 1   BAYTEX OIL 32  
ACME 3   AMINEX USA 1   AVALANCHE 3   BEACH 16  
ACOCK 49   AMINI 1   AVERILL 56   BEACHAM 1  
ACOCK/ANAQUA 36   AMINOIL 28   AVERY 7   BEACON 15  
ACOMA 4   AMISTAD 2   AWOEB 3   BEADLE 1  
ACORN 4   AMMAN & McNAB 2   AXEM 6   BEALL 3  
ADA 72   AMMCO 3   AXIO 2   BEAMAN 5  
ADAIR 2   AMMEX 15   AXIS 1   BEAMON 6  
ADAMS 62   AMMONITE 4   AYERS 5   BEARD 15  
ADCO 3   AMOCO 316   AYERS & SWOPE 1   BEASLEY 1  
ADCOCK 1   AMOY 10   AYRES 13   BEATY 1  
ADDINGTON 3   AMPAK 35   AZALEA 2   BEAUCHAMP 2  
ADELANTE 1   AMPECO 2   AZAR 1   BECHTEL 1  
ADELON 2   AMPHION 1   AZMUTH 1   BECK 15  
ADENA 2   AMPOLEX 1   AZTEC 14   BECKER 32  
ADKINS 1   AMSLER 9   AZUL 6   BECKHAM 2  
ADMIRAL 2   AMUREX 1   B & B 11   BECKMAN 8  
ADOBE 27   ANADARKO 49   B & D 1   BECO 2  
ADRIAN 1   ANAQUA 59   B & E 1   BEDWELL 16  
AEGEAN 7   ANCIENT SEAS 1   B & G 6   BEER 26  
AEGIS 2   ANCIRA 1   B & K 1   BEGEMAN 9  
AEOX-ST 2   ANCON OIL 11   B & L 2   BEHEMOTH 4  
AERO COLOMA 1   ANDERMAN 6   B & M 20   BEHRING 1  
AFROMA 53   ANDERSON 170   B & S 1   BEL OIL 7  
AGCO 4   ANDERSON-PRICHARD 35   B & W 1   BEL-POTA 3  
AGOIL 34   ANDOVER 7   B B L 3   BELAIRE 1  
AGSCO 6   ANDRADE 34   B B M 16   BELCHER 4  
AHERN 20   ANDRAU 4   B D K 112   BELCO 64  
AID 12   ANDRAU-HADA 1   B D PRODUCTION 31   BELGAM 8  
AIKMAN 13   ANDREEN 2   B D R 3   BELL 25  
AKIN 3   ANDRES 2   B G EXPLORATION 1   BELL & DANSFIELL 21  
AKRON 6   ANDRESS 38   B H P 29   BELL, JAY 1  
ALABAMA MINERALS 1   ANDREWS 88   B H P PETROLEUM 1   BELL, KELLY 64  
ALABLANCA 1   ANDRUS 9   B J B 15   BELLOWS 2  
ALADDIN 2   ANGEL LAND 2   B J OIL MANAGEMENT 1   BELLWETHER 3  
ALAMO 43   ANGELINA 3   B M W RESOURCES 2   BELMONT 1  
ALANCO 2   ANGLO PRODUCTION 2   B N P 39   BENEDUM 11  
ALANIZ 5   ANGLO-DUTCH 1   B P AMERICA 14   BENEDUM-TREES 43  
ALASKA STEAMSHIP 129   ANGLO-NATIONAL 2   B P L 1   BENGAIL 3  
ALASKA TEX 3   ANHUR 5   B P PRODUCTION 5   BENGE 1  
ALBRECHT 4   ANISMAN 2   B S E PRODUCTION 5   BENHAM 1  
ALBRIGHT 2   ANKENMAN 4   B T 6   BENNETT 35  
ALCO DRILLING 16   ANN 1   B T A OIL 31   BENNETT, MILLS 154  
ALCO OIL 11   ANSCHUTZ 52   B W A B 1   BENSON 13  
ALCOA 88   ANSELMA 1   B Y S INC. 1   BENTEX 6  
ALCOR 2   ANSTER 1   B-G OPERATING 1   BENTON 1  
ALCORN 16   ANTARA 1   BABB 1   BENTSEN 72  
ALECO 1   ANTARES 28   BACARISSE 1   BENZ 7  
ALEXANDER 8   ANTEX 2   BAGDAD 3   BENZ-STODDARD 5  
ALFORD 6   ANTLER 2   BAGNALL 1   BENZAQUIN 1  
ALGORD 1   APACHE 140   BAHIA 30   BEPCO 2  
ALICE 2   APCO 2   BAILEY 38   BERENERGY 10  
ALICE OIL 1   APEX ENERGY 26   BAINBRIDGE 2   BERG 1  
ALKEK 45   APEX OIL 4   BAKER 22   BERGMAN 37  
ALL AM 5   APEXCO 5   BAKKE 29   BERING 32  
ALLAUN 1   APOLLO 5   BALBOA 2   BERKLEY 2  
ALLBRIGHT 1   APPELL 246   BALD 2   BERKSHIRE 1  
ALLDAY 24   APPLE 1   BALDRIDGE 163   BERLY 1  
ALLEGRO 73   APPLIED THERMAL 2   BALLANFONTE 3   BERNARD 1  
ALLEN 115   APPLING 1   BALLARD 46   BERRY 3  
ALLEN & MORRIS 5   AQUILA 6   BALLENGEE 1   BERTELSON 1  
ALLEN & SHUMATE 5   AQUITAINE 1   BALTIC 20   BERTMAN 1  
ALLERKAMP 10   ARANSAS 9   BAM 2   BEST 1  
ALLIANCE 7   ARAPAHO 1   BAMM 1   BETA 1  
ALLIED DRILLING 6   ARAXAS 3   BAMMERT 1   BETTIS 70  
ALLIED HYDROCARBONS 2   ARCADIA 10   BANCROFT 2   BEVERS 1  
ALLIED OIL 2   ARCHER 6   BANDER 1   BEVLY 31  
ALLIED PRODUCTION 10   ARCO 355   BANDERA 2   BEXCO 20  
ALLISON 7   ARENA 20   BANKHEAD 17   BID-RICH 1  
ALLTEX 2   ARENDALE & LOWE 3   BANKLINE 7   BIG 6 DRILLING 47  
ALMAC 8   ARGO 282   BANKS MILLER 3   BIG CHIEF 2  
ALMAR 3   ARGOS 4   BANNER 2   BIG LAKE 5  
ALPHA ENERGY 1   ARGUS 3   BANNON 2   BIG SHELL 3  
ALPHA EXPLORATION 7   ARGYLE 1   BAR D 3   BIG SPRINGS 6  
ALPHA GAS 8   ARICK 1   BAR M 18   BIGHART 2  
ALPHA OIL 2   ARIES 1   BAR MAR 2   BIGHORN 1  
ALPHA OMEGA ENERGY 4   ARK 15   BAR S 1   BIGLANE 2  
ALPHA PRODUCTION 1   ARKANSAS FUEL 252   BAR-MAC 1   BILBO 14  
ALSABROOK 2   ARKLA 7   BAR-MAR 1   BILLFISCH 4  
ALSAN 2   ARLEDGE 12   BARBARA 16   BILLINGS 9  
ALTA 1   ARMADA 4   BARBEE 6   BINNEY 1  
ALTA ENERGY 2   ARMER 1   BARBER 12   BINTLIFF 13  
ALTA MESA 6   ARMOUR 40   BARBRE 1   BIRD 1  
ALTA VISTA 13   ARMOUR-RICHARDS 1   BARGE 1   BIRDWELL 59  
ALTEX 2   ARMSTRONG 100   BARGO ENERGY 2   BISCO 1  
ALTGELT 1   ARMSTRONG & HORN 11   BARIA 18   BISHOP 43  
ALUMINUM CO. OF AMERICA 175   ARMSTRONG & SUTTON 19   BARKER 4   BISKAMP 2  
ALWORTH 1   ARNOLD 26   BARNEBURG 10   BISSETT 1  
ALYANA 1   ARNOLD WELL SERVICE 95   BARNES 20   BITTNER 1  
ALYNDSON 2   ARRIBA 46   BARNETT 4   BLACK 37  
AM-RDC 1   ARRINGTON 2   BARNHART 8   BLACK GOLD 2  
AM-TEX 2   ARROW 31   BARNHILL 7   BLACK RIVER 4  
AMAL 2   ARROWHEAD 2   BARNSDALL 221    
AMALGAMATED 7   ARROYO 1   BARNWELL 6    
AMAR 5   ARSHT 1   BARON 5    
AMARCO 1   ARTZBERGER 1   BARRACUDA 1    
AMAREX 1   ASAMERA 10   BARRANCA 1    
AMARILLO 5   ASCENT 13   BARRETT 4    
Operator Count   Operator Count   Operator Count   Operator Count  
BLACK ROCK 9   BRINKERHOFF 8   CAGE 8   CHAMPLIN 384  
BLACKBRUSH 1   BRINKOETER 3   CAIN 26   CHANCE 3  
BLACKFOOT 1   BRISCOE 22   CAL MON 1   CHANDLER 2  
BLACKJACK 7   BRISTOL 3   CAL-TEX 3   CHANOCO 29  
BLACKMAR 2   BRISTON 1   CALADONIA 1   CHAPARRAL 27  
BLACKWELL 1   BRISTOW 15   CALAME 1   CHAPARROSA 27  
BLAFFER 5   BRITANCO 1   CALATEXIA 1   CHAPCO 1  
BLAIR 25   BRITISH AMERICAN 62   CALAWAY 16   CHAPMAN 139  
BLAIR-VREELAND 193   BRITISH TEXAN 8   CALCO 2   CHARLTON 10  
BLAIRSVILLE 2   BRITTANY 1   CALDWELL 8   CHARO ENERGY 10  
BLAKE ENERGY 9   BROAD OAK 1   CALHOUN 2   CHARRO 34  
BLALOCK 2   BROADHEAD 1   CALIBOGUE 2   CHARTER 2  
BLANCHARD 21   BROADUS 6   CALIBRI 1   CHASE 8  
BLANCO 215   BROADWAY 1   CALIFORNIA CO. 12   CHASS 25  
BLANKE 1   BROCATO 9   CALIFORNIA TIME 1   CHASTAIN 1  
BLANTON 6   BROCK 36   CALIFORNIA TIMES 3   CHAVANNE 24  
BLAZER 6   BROGAN 2   CALIX 1   CHENOWETH 1  
BLEAKLEY 14   BRONCO 2   CALLAHAN 2   CHEROKEE 8  
BLEDSOE 2   BROOKLYN 9   CALLAWAY 18   CHEROSAGE 22  
BLOCK 1   BROOKS 5   CALLENDER 2   CHERRY 7  
BLOCKER 46   BROONER 26   CALLERY 39   CHERRYVILLE 37  
BLOHM 6   BROSECO 13   CALLON 5   CHESAPEAKE 63  
BLOMGREN 3   BROWN 355   CALOHAN 11   CHESNUTT 5  
BLOUNT 18   BROWNING 10   CALPINE 2   CHESSER 1  
BLUCHER 2   BRUMMETT 10   CALVERT 78   CHESSHER 1  
BLUCO 14   BRUNER 57   CAM CORP. 15   CHEVRON 115  
BLUE JAY 8   BRUNNETT 1   CAMBELL 3   CHEYENNE 5  
BLUE RIDGE 4   BRUNO 3   CAMBRIAN 1   CHICAGO 350  
BLUE SKY 23   BRUNS 39   CAMBRIDGE 53   CHICO OIL 1  
BLUE WATER 3   BRYAN 15   CAMDEN 31   CHIEF 1  
BLUE WING ENERGY 1   BRYANT 40   CAMERINA 3   CHILDERS 10  
BLUEBONNET 3   BUCHANAN 41   CAMERON 97   CHILDRESS 1  
BLUERIDGE 3   BUCK 24   CAMINO 12   CHILES 76  
BLUESTONE 2   BUCKALOO 9   CAMOIL 1   CHILTIPIN 3  
BLUFF 2   BUCKINGHAM 13   CAMP 114   CHINN 7  
BLUHAWK 1   BUCKLEY 7   CAMPANA 4   CHIODO 2  
BLUMBERG 10   BUDA 2   CAMPARIA 1   CHIPPEWA 1  
BLUMENTHAL 1   BUELL 2   CAMPBELL 53   CHIQUITA 2  
BLUTCH 2   BUESCHER 3   CAN-AM 1   CHISHOLM 1  
BOB'S SERVICE 1   BUETTNER 1   CANADIAN NORTHWEST 1   CHIZUM 26  
BOCK 6   BUFFALO 15   CANALES 28   CHOATE 2  
BODE 2   BUNN 12   CANKIE 1   CHOCTAW 1  
BOEGENTER 1   BUNTE 10   CANNAN, MORRIS 154   CHOICE 23  
BOLDING 2   BUNTIN 1   CANNAN-SUBSURFACE 1   CHOYA DRILLING 12  
BOLIN 10   BUR-KAN 1   CANNON 12   CHRISCO 1  
BOLING 8   BURCH 21   CANNONBALL 2   CHRISTIAN 3  
BOLLER 4   BURDEN 1   CANTEX 1   CHRISTICO 31  
BOLLING 1   BURDETTE 1   CANTRELL 1   CHRISTIE 116  
BOLLMAN 1   BURDITT 2   CANTRO 9   CHRISTILIN 2  
BOLSA 1   BURFORD 2   CANUS 170   CHRISTINA 1  
BOLTON 2   BURK ROYALTY 69   CANUSA 4   CHRISTOPHER 35  
BOMMER 18   BURKART 1   CAPE 1   CHUMNEY 1  
BONANZA 6   BURKE 21   CAPITAL STAR 9   CHURCH 4  
BONAVENTURE 5   BURKHARDT 1   CAPITAN 1   CICHOWSKI 5  
BOND, DURBIN 20   BURKHART 6   CAPITOL 51   CICO 103  
BOND, ROLAND 4   BURLESON 8   CAPITOL RESOURCES 6   CIMAREX 6  
BONNER 2   BURLINGTON 8   CAPPS 2   CIMARRON 42  
BONOIL 1   BURNAM 1   CAPRICORN 1   CINCO 11  
BOONE 3   BURNELL 7   CAPRINA 5   CIRCLE 20  
BOOTH & HOLMAN 4   BURNETT 54   CAR-LOID 1   CIRCLE 7 OIL & GAS 2  
BOOTHE 1   BURNS 217   CARAWAY 5   CIRCLE W 6  
BOPCO 2   BURR 8   CARBIDE 2   CIRRUS 2  
BORDER 51   BURR & CREWS 1   CARBONIT 1   CITADEL 2  
BOREN 3   BURROW 3   CARDEN 1   CITATION OIL & GAS 12  
BORNEFELD 1   BURSON 2   CARDOIL 1   CITEX 1  
BORSODI 4   BURTON 24   CAREY 13   CITIES PROD. 2  
BOSS EXPLORATION 2   BUSBY 4   CARIBBEAN 21   CITIES SERVICE 417  
BOSTON 11   BUSCHMAN 2   CARIBOU 4   CITY OF JOURDANTON WATER BOARD 1  
BOTTOMS 1   BUSMORE 14   CARL 65   CITY PRODUCTS 1  
BOUNDS 1   BUTCHER 34   CARLANDA 10   CLA-BAR OIL 6  
BOUNTY 20   BUTLER 74   CARLEE 2   CLAN 1  
BOURNE 2   BUTT 8   CARLESS 4   CLANTON 3  
BOW 3   BUTTERCUP 1   CARLON 12   CLARDY 18  
BOWDEN 1   BUTTES 37   CARLOS 4   CLARDY & BARNETT 1  
BOWEN 4   BUTTRAM 2   CARLSON 16   CLARK 246  
BOWLES 22   BUZZINI 14   CARLTON 3   CLARKSON 2  
BOWLING 2   BYARS 8   CARNES 18   CLARKWOOD 2  
BOWMAN 4   BYER 1   CAROLINA 2   CLARY 1  
BOWMAN CATTLE 14   BYRD 11   CAROLINA-TEXAS 2   CLAY 7  
BOYCE 7   BYS INCORPORATED 1   CARPENTER 3   CLAYTON 4  
BOYD & DURST 3   C & E 168   CARR 227   CLEAR FORK 2  
BOYD & GALT 1   C & J 1   CARRIE 1   CLEARY 22  
BOYKIN 59   C & K 46   CARRILLO 1   CLEGG 14  
BOYLE 73   C & M 1   CARRIZO 39   CLEMCO 17  
BOYSEN 34   C & R 1   CARRL 223   CLEMENTS 10  
BRACHMAN 1   C A G 7   CARROLL 1   CLEVA 2  
BRACKEN 3   C B & S 43   CARTER 319   CLEVELAND 8  
BRADBURY 1   C B ENERGY 6   CARTHAY 22   CLEVENGER 11  
BRADCO 19   C B GATHERING 4   CARTTER 1   CLIFFS DRILLING 1  
BRADEX 1   C C LEASEHOLD 1   CARTWRIGHT 5   CLIFFWOOD 1  
BRADFORD 5   C C M G 1   CASA GRANDE 2   CLIMAX 3  
BRADLEY 1   C C OPERATING 2   CASCADE 3   CLINE 6  
BRADSHAW 2   C D CONSULTING 3   CASCO 1   CLINTON 48  
BRADSTREET 1   C D E 3   CASE-POMEROY 1   CLIPPER 1  
BRADY 4   C D RESOURCES 11   CASEY 4   CLOPTON 16  
BRAHANEY 2   C E T 3   CASH 5   CLOUD 1  
BRAHMAN 8   C G V 4   CASHCO 17   CLOVER 77  
BRALORNE 1   C H & M 2   CASHION 9   CLUCK 3  
BRAMAN 66   C H F 1   CASKEY 10   CLYMORE 20  
BRAMMER 15   C J D 2   CASKIDS 8   COALINGA 2  
BRANDON 8   C L F 1   CASTLE 4   COAST CO. 18  
BRANHAM 15   C M & M 1   CASTLEMAN 1   COASTAL BEND DRILLING 1  
BRANN 1   C M & W 1   CATAHOULA 4   COASTAL BEND OIL 17  
BRANNON 3   C M C 6   CATARINA 3   COASTAL DRILLING & WORKOVER 5  
BRANSON 1   C M L 1   CATER 2   COASTAL ENGINEERING 3  
BRASADA 1   C M OIL 4   CATLETT 88   COASTAL EXPLORATION 1  
BRASFIELD 1   C M S 1   CATTLE LAND 56   COASTAL GULF 1  
BRAUER 6   C N 1   CAUBLE 11   COASTAL OIL & GAS 292  
BRAUN 21   C N G 15   CAVALIER 2   COASTAL OIL & LAND 10  
BRAVADO 1   C N R 4   CAVALLA 14   COASTAL PLAINS 5  
BRAWLEY 1   C P C 73   CAWTHON 3   COASTAL PRODUCTION 6  
BRAYERS 1   C P C DALE OPERATING 2   CAYMAN 10   COASTAL REFINERIES 102  
BRAYTON 87   C P X 25   CAYUGA 5   COASTAL STATES 521  
BRAZELL 5   C R A 5   CAZA OPERATING 1   COASTAL TEX 1  
BRAZOS 220   C R B 24   CE-BETH 3   COASTAL TREND 66  
BRAZOS OIL & GAS 19   C R L 1   CEDAR HILL 1   COASTAL WELL SERVICE 1  
BREGMAN 2   C R M 2   CELERON 4   COASTLAND 1  
BREHM INVESTMENT 1   C S A 9   CELTIC 1   COASTLINE 69  
BRELSFORD 2   C S X 2   CENERGY 18   COATES 268  
BRENAN 4   C T OIL & GAS 1   CENIZA 32   COATS 3  
BRENNAN 2   C T R 3   CENTAUR 3   COBBS 1  
BRENT 2   C X Y ENERGY 3   CENTENNIAL 28   COBRA 28  
BREUER 34   C-AIR 2   CENTEX 3   COCHRAN 40  
BREWER 5   C-K RESOURCES 7   CENTRAL 34   COCKBURN 62  
BREWSTER 32   C-TECHNOLOGY 2   CENTURA 19   COCKRELL 108  
BRIAN 1   CABEZA 1   CENTURION 2   CODY 98  
BRIDAS 1   CABILDO 2   CENTURY 73   COE 1  
BRIDEWELL 31   CABLE 1   CENZIA 1   COFFEE 79  
BRIDGE 53   CABOT 90   CERRO DE PASCO 11   COFFEY 11  
BRIDGER 7   CABRE 1   CHABTEX 1    
BRIDWELL 467   CACHARA 4   CHALLENGE 5    
BRIGGS 1   CACTUS 6   CHAMBERLAIN 13    
BRIGHAM 56   CADDO 102   CHAMBERS 24    
BRIGHT 204   CAESAR 2   CHAMBLISS 1    
BRILL 10   CAFRE 3   CHAMPION 3    
Operator Count   Operator Count   Operator Count   Operator Count  
COFFIELD 10   CRIMSON 4   DELEE 2   DYAD 1  
COFFMAN 25   CRIPPLE CREEK 2   DELFERN 2   DYCO 2  
COGGINS 1   CROCKET 1   DELHI 62   DYNAMIC 74  
COGSWELL 1   CROCKETT 7   DELHI-TAYLOR 130   DYONISIO 1  
COHEN 5   CRON 24   DELK 1   E & H 4  
COHO 5   CROOM 1   DELKER 14   E & L 1  
COKE 1   CROSBY, A. W. 4   DELLINGER 25   E C C 3  
COKER 1   CROSS TIMBERS 1   DELLWOOD 15   E E X 10  
COKINOS 1   CROUCH 52   DELRAY 64   E K O 12  
COLBY 2   CROW 7   DELTA AMERICAN 25   E M J 1  
COLE 63   CROWE 1   DELTA BRAVO 1   E O G RESOURCES 169  
COLEMAN 2   CROWELL 1   DELTA DRILLING 7   E P OPERATING 49  
COLETTO CREEK 1   CROWN 17   DELTA EXPLORATION 1   E R I 11  
COLGIN 1   CROWN CENTRAL 110   DELTA GULF 24   E S B E 1  
COLINE OIL 1   CRUDE OIL 1   DELTA PETROLEUM 1   E-COR 3  
COLLIER 17   CRUMP 3   DELTA US 1   E-G JOINT VENTURE 6  
COLLINS 41   CRUTCHER 1   DENALI 5   EADS 20  
COLLOM 1   CRUTCHFIELD 1   DENISON 1   EAGLE 28  
COLO 1   CRUX 3   DENMAN 6   EAGLEFORD HUNTER RESOURCES 1  
COLOBRI 2   CRYSTAL 41   DENNIS 9   EARTH SCIENCES 6  
COLOGNE 37   CUATRO 1   DENOVO 4   EASON 9  
COLOMA 56   CUDE 21   DENTLER 1   EAST SIDE 2  
COLONIAL 2   CUELLAR 11   DENTON 1   EAST WEST INVESTMENT 1  
COLONNADE 1   CUERO 1   DENVER AMERICAN 3   EASTERN ENERGY 1  
COLORADO 57   CULLEN 29   DEROSSETT 5   EASTERN GAS 12  
COLSON 2   CULLINAN 5   DESANA 1   EASTERN OIL 2  
COLT 2   CULOCO 1   DESCO 1   EASTERN STATES 6  
COLTON 30   CULTON 16   DEVEX 1   EASTERN TEXAS 3  
COLUMBIA 45   CULVER 1   DEVINE 5   EASTERWOOD 21  
COLUMBIAN 3   CUMEX 2   DEVON 44   EATON 7  
COLUMBUS 38   CUMMINGS 10   DEVONIAN 3   EBERT 2  
COLVIN 4   CUMMINS 74   DEWALT 3   ECA HOLDINGS 1  
COMANCHE 17   CUMMINS & WALKER 130   DEWBRE 117   ECHO 1  
COMBINED AMERICA 1   CUNNINGHAM 45   DEWITT OIL & GAS 3   ECHOLS 51  
COMBINED PRODUCING 1   CURRAN 1   DIADEM 1   ECKERT 7  
COMBUSTION PRODUCTS 7   CURREY 3   DIAMEX 8   ECKOLS 2  
COMCO-CENTURION 1   CURRY 6   DIAMOND 42   ECLETO 1  
COMETRA 22   CUSACK 1   DIAMOND HALF 1   EDCO 9  
COMMERCE 2   CUTBIRTH 17   DIAMOND SHAMROCK 3   EDDY 35  
COMMERCIAL 53   CXY ENERGY 1   DIASU 3   EDEN OIL 2  
COMMONWEALTH 14   CYCLOPS 2   DICE 2   EDGAR 13  
COMPASS 2   CYPRESS E & P 4   DICK 39   EDGE 123  
COMPLETE OIL 4   CYPRUS 24   DICKSON 1   EDGE PETROLEUM 1  
COMSTOCK 23   CZAR 11   DIETERT 3   EDINBURG 1  
CON-TEX OIL 1   D & D 9   DIFFERENTIAL 1   EDISTO 1  
CONCHO 11   D & G 54   DILLARD 27   EDMISTON 4  
CONCORD 12   D & M 1   DILLEY 45   EDMONT 1  
CONDRY 1   D A R T 3   DILLON 69   EDWARDS 71  
CONE 1   D B O 5   DINERO 126   EGAN 36  
CONES 3   D C B OIL & GAS 1   DINN 1   EHMAN 1  
CONFEDERATE 10   D D D ENERGY 1   DIRKS 104   EI-FEL 1  
CONLEY 3   D D G 31   DIRNETT 2   EICHER 6  
CONN 1   D D OIL 1   DISCORBIS 47   EILAND 1  
CONNER 1   D J EXPLORATION 1   DISCOVERY 24   EKO 1  
CONOCO 368   D K D 4   DISHMAN 3   EL CAMINO 1  
CONQUEST 19   D K G 11   DIVERSA 12   EL CHORRO 3  
CONROE 77   D L B 1   DIXEL 15   EL DORADO 26  
CONROY 1   D M C 1   DIXIE 19   EL INDIO 1  
CONSERVATIVE OIL 16   D M L 4   DIXILYN 2   EL PASO 126  
CONSOLIDATED 131   D R S 4   DIXON 30   EL REGALO 3  
CONSTANTIN 1   D S M OIL 2   DOBBINS 3   EL REY PETROLEUM 2  
CONTINENTAL 1343   D V OIL 1   DODGEN 1   EL RIO 1  
CONTINENTAL TREND RESOURCES 11   D Y EXPLORATION 4   DOHERTY 1   EL-TEX 3  
CONTRACT ENERGY 1   D'UNGER 5   DOLCH 10   ELAM 2  
CONVEST 77   DABNEY 1   DOLPHIN 2   ELAND 1  
CONWAY 4   DADE 1   DOME 1   ELEANOR OIL 1  
COOK 18   DAIGEL 1   DOMESTIC FUELS 1   ELECTROSEIS 2  
COOKE 2   DAKAMONT 7   DOMINION 78   ELECTROTHERMIC 9  
COOLEY 1   DAL-LONG 6   DONICO 5   ELF AQUITAINE 4  
COON 13   DALE 52   DONKIN 2   ELINOR OIL 1  
COON-MURPHY 1   DALECO 24   DONZIS 2   ELLEDGE 2  
COONRAD 5   DALEX 3   DOOLEY 1   ELLIOTT 12  
COOPER 7   DALLAS 10   DORADO 1   ELLISON 2  
COPANO 25   DALPORT 23   DORAN 49   ELLOCO 1  
COPETCO 3   DAMSON 41   DORCHESTER 33   ELLSTROM 1  
COQUAT 131   DANCIGER 29   DORFMAN 1   ELLSWORTH 110  
COQUINA 21   DANCO 1   DORRANCE 9   ELMAX 1  
CORAL 12   DANE 2   DORRIS 3   ELMER 1  
CORDA 1   DANIEL 18   DOSS 2   ELMONT 1  
CORDELE 18   DANIELS 3   DOUBLE EAGLE 36   ELMS 3  
CORDELL 2   DANIELSON 6   DOUBLE J 2   ELTOBILT 1  
CORDER 1   DANMOR 1   DOUBLE PLAY 17   ELWOOD 1  
CORDER, KNOX 3   DANOIL 3   DOUBLE S 1   ELY 2  
CORE EXPLORATION 3   DANREY 5   DOUBLE U 30   EMINENT 2  
CORENERGY 5   DANSFIELL 28   DOUGHERTY 108   EMPIRE 5  
CORGEY 38   DANT 2   DOUGHTY 45   EMRY 1  
CORKILL 1   DANTEX 9   DOUGLAS 122   ENCANA 1  
CORLEY 16   DANZIGER 1   DOVRE 2   ENCINO 20  
CORNELIUS 1   DARBY 14   DOW CHEMICALS 119   ENCINO ENERGY 1  
CORNELL 3   DARCY 3   DOWNEY 1   ENCO EXPLORATION 84  
CORNERSTONE 2   DARNER 11   DOWNING 12   ENCON 5  
CORNING 7   DARROH 2   DOYLE 5   ENDEAVOUR 6  
CORONADO 72   DARSEY 8   DOYNO 2   ENDERLI 1  
CORPENING 15   DASA 13   DR. MC 1   ENDICOTT 3  
CORPUS CHRISTI CORPORATION 13   DASH 9   DR. PEPPER BOTTLING CO. 1   ENDREX 4  
CORPUS CHRISTI DRILLING 1   DASKAM 2   DRAKE 5   ENDURING 1  
CORPUS CHRISTI EXPLORATION 5   DAUBERT 197   DRAPER 14   ENDURO 1  
CORPUS CHRISTI LEASEHOLDS 13   DAUBES 2   DREXEL 9   ENERCO 4  
CORPUS CHRISTI MANAGEMENT 43   DAUCHY 50   DREYFUS 2   ENERCORP 2  
CORPUS CHRISTI OIL & GAS 176   DAUGHERTY 7   DRILLCO 3   ENERGETICS 56  
CORPUS CHRISTI REFINING 5   DAUNTLAS 2   DRILLERS ENERGY 37   ENERGEX 2  
CORRON 1   DAVACO 1   DRILLING & EXPLORATION 40   ENERGO 1  
CORRUM 1   DAVENPORT 36   DRILLMAR 1   ENERGY 44  
CORSICANA 1   DAVES 1   DRISCOLL 32   ENERGY DEVELOPMENT 86  
CORUM 31   DAVIDOR 20   DRIVER 3   ENERGY ENTERPRISES 6  
CORY 2   DAVIDSON 15   DRYER 1   ENERGY EQUITY 1  
CORZELIUS 2   DAVIE 1   DUAL 1   ENERGY EXPLORATION 1  
COSDEN PETROLEUM 28   DAVIES 1   DUDLEY 1   ENERGY HUNTER 1  
COSEKA 1   DAVIS 375   DUER-WAGNER 2   ENERGY INTERNATIONAL 4  
COSMO 6   DAVMOR 1   DUFF 1   ENERGY INVESTMENTS 6  
COSNER 11   DAVOIL 1   DUGGER 68   ENERGY PROJECTS 2  
COSTA 4   DAWSON 51   DUKE 2   ENERGY RESERVES GROUP 26  
COSTILLA 18   DAY 1   DULANEY 124   ENERGY RESOURCES 9  
COTTON 104   DAYVAULT 1   DULCE OIL 3   ENERGY SEARCH 2  
COTTONWOOD 33   DE SHANE 1   DULUP 17   ENERGY SOURCES 7  
COUCH 4   DEAN 16   DUNBAR 5   ENERGY TREATING 1  
COUGAR 6   DeARMON 1   DUNCAN 17   ENERGY UNLIMITED 5  
COWAN 1   DEBROW 1   DUNHAM 4   ENERQUEST 9  
COWANCO 6   DECKER 31   DUNHILL 3   ENEX 2  
COWELL 1   DECLEVA 6   DUNLAP 23   ENEXCO 5  
COX 896   DEEP ROCK 32   DUNN 3   ENGELKE 93  
COYLE 10   DEEP SOUTH 6   DUNNAM 2   ENGEO 83  
COYOTE TRUST 1   DEERING 1   DUNWOODY 16   ENGLAND 1  
CRAIG 2   DEETER 20   DUPONT 3   ENGLE 1  
CRANFILL 2   DeGRAZIER 2   DUQUESNE 1   ENGLISH 1  
CRAWFORD 18   DeGUIRE 8   DURANGO 2   ENHANCED ENERGY 1  
CREDO 1   DEICO 1   DURBIN BOND 9   ENI EXPLORATION 2  
CREECH 1   DEKALB ENERGY 9   DURBIN OIL 2   ENRE 22  
CREIGHTON 3   DEL MAR 23   DURHAM 2   ENRON 389  
CRESCENT 30   DEL PETROLEUM 6   DURST 8    
CRESLENN 5   DELANEY 1   DUTY TOOL 3    
CREST 33   DELANGE 268   DUVACO 1    
CRESTMONT 1   DELANO 1   DUVAL COUNTY RANCH CO. 66    
CREWS 20   DELAWARE 3   DUVAL OIL 45    
CRICKET 3   DELCAR 12   DUVAL PRODUCTION 11    
Operator Count   Operator Count   Operator Count   Operator Count  
ENSCO 1   FINE 1   GAEA 1   GLOBAL 8  
ENSERCH 54   FINGER 23   GAELIC 2   GLOBE OPERATING CO. 8  
ENSIGN 1   FINLEY 11   GAGE 1   GLOVER 1  
ENSOURCE 1   FINNEY 4   GAINCO 12   GLYNN-THOMPSON 1  
ENSTAR 10   FIRST ARANSAS 1   GAINES 10   GO ENERGY 3  
ENTERPRISE 28   FIRST ENERGY 11   GAITHER 11   GO OIL 1  
ENTERPRISES 2   FIRST MATAGORDA 5   GALATIA 2   GO-ENERGY 4  
ENTEX 19   FIRST OIL 1   GALAXY 171   GO-TEX 8  
ENTRUST 1   FIRST ROCK 7   GALLAHER 7   GODBOUT 1  
EPPLER 1   FIRST UNITED 2   GALLO DE CRISTAL 1   GODSEY 11  
EQUINOX 1   FIRSTRIKE ENERGY 2   GALLOWAY 1   GOERNER 1  
EQUITABLE 12   FISCHER 80   GALO ENERGY 6   GOETZ 8  
EQUITX 7   FISH 5   GALT 1   GOFORTH 2  
EQUITY 7   FISHER 24   GALVEZ 1   GOHLKE 3  
ERIN SOUTHWEST 1   FISHER-WEBB 25   GAMBLE 6   GOHLKE-BENGE 1  
ERNEST 5   FITE 1   GAMMA RESOURCES 3   GOLDEN 40  
ERSKINE 22   FITTIPALDO 1   GAMMETER 1   GOLDING 3  
ERWIN 1   FITZGERALD 9   GAR 4   GOLDKING 244  
ESCOBA 1   FITZPATRICK 67   GAR-FLO 1   GOLDMAN 1  
ESCONDIDO 5   FIVE RESOURCES 6   GARCIA 1   GOLDRUS 23  
ESENJAY 320   FLAG-REDFERN 24   GARDESCU 1   GOLDSMITH 6  
ESGEN 2   FLAITZ 59   GARDNER 36   GOLDSTON 243  
ESPADA 4   FLAMINGO 13   GARLAND 2   GOLDSTRAND 1  
ESPERANZA 6   FLANAGAN 2   GARLITZ 4   GOLIAD 34  
ESTES 2   FLARE 2   GARNER 1   GOLSON 1  
ESUNAS 5   FLASKE 1   GARNETT 6   GOMA 2  
ESVES 1   FLEET 2   GARR 2   GOOD DAY 8  
ETHREDGE 2   FLEMING 1   GARRETT 8   GOOD HOPE 147  
ETHYL 13   FLETCHER 7   GARRISON 12   GOODALE 22  
ETOCO 12   FLO-TEX 1   GARVEY 8   GOODELL 4  
EUBANK 4   FLOBOOTS 4   GARVIN 1   GOODHUE 1  
EUBANKS 3   FLORENCE 3   GARY 1   GOODRICH 13  
EUGENE 9   FLORIDA 24   GAS 2   GOODWIN 1  
EURA B. OIL 1   FLOUR BLUFF 2   GAS PRODUCING ENTERPRISES 55   GORDEN 1  
EURATEX 2   FLOURNOY 233   GAS ROCK 5   GORDON 12  
EUREKA 1   FLOWERS 23   GASAWAY 1   GORMAN 330  
EUROPEAN 20   FLOYD 2   GASOLINE PRODUCTION 126   GORUM 6  
EVANS 56   FLUSS 1   GASPAR RICE 1   GOSE 137  
EVCO 7   FLY 70   GASPER RICE 34   GOTTLIEB 2  
EVERBRIGHT 8   FLYING DIAMOND 2   GASROCK 3   GOUGER 11  
EVEREST 100   FLYING W 1   GASTEX 1   GOULD 1  
EVERGREEN 23   FLYNN 19   GASTRANS 6   GOVERNMENT WELLS 24  
EVERS 1   FOHS 13   GATES 2   GRABOWSKI 5  
EVERSOLE 1   FOHS & FOHS 1   GATHINGS 36   GRACE 72  
EWING 4   FOLWELL 3   GATO 2   GRACEY 1  
EXCELSIOR 6   FONTANA 10   GAUNTT 3   GRAGG 2  
EXETER OIL 17   FORAN 3   GAUTREAUX 1   GRAHAM 382  
EXP 1   FORBES 2   GAYLE 1   GRAMAC 1  
EXPANDO 67   FORCE 4 ENERGY 1   GEDDIE 4   GRAMMAR 1  
EXPEX 1   FORCENERGY 2   GEE 1   GRANDE 12  
EXPLORATION 31   FORD 121   GEER 2   GRANDIN 1  
EXPLORATION DRILLING 1   FOREE 4   GEIER-JACKSON 2   GRANITE 4  
EXPLORATION INVESTMENTS 1   FORES 1   GEISE 3   GRANT 7  
EXPLORATION, LTD 1   FOREST 380   GEISELMAN 15   GRARIDGE 22  
EXPLORECO ENERGY 2   FORESTER 5   GEISER 52   GRASTY 2  
EXPLORER 1   FORETICH 1   GEM 8   GRAVIS 59  
EXPORT 10   FORGOTSON 1   GEMACA 1   GRAWARD 1  
EXPRESS 3   FORMAN 2   GEMARMI 3   GRAY 39  
EXPRO 1   FORNEY 243   GEMINI 9   GRAY WOLFE 2  
EXSUN 32   FORT APACHE 1   GENERAL AMERICAN OIL 18   GRAYBURG 6  
EXTEX 1   FORT BEND 16   GENERAL ATLANTIC 1   GREAT BASINS 13  
EXXETER PETROLEUM 20   FORT WORTH 1   GENERAL CRUDE 261   GREAT EXPECTATION 2  
EXXON 2127   FORTENBERRY 6   GENERAL PETROLEUM 2   GREAT LAKES 29  
EZZELL 14   FORTRESS MINERALS 4   GENERAL PROD. 7   GREAT NATIONAL 1  
F & B ENERGY 2   FORTSON 1   GENERAL WELL 3   GREAT PLAINS 6  
F C D 3   FORTUNE 1   GENESIS 137   GREAT SOUTHERN 2  
F F A 2   FOSS 2   GEO ENERGY 5   GREAT SOUTHWEST 1  
F G B 2   FOSSIL BAY 5   GEO EXPLORATION 3   GREAT SOUTHWESTERN 1  
F-W OIL 1   FOSSIL EXPLORATION 19   GEO FOCUS 1   GREAT STATES 3  
FAGAN 5   FOSTER 14   GEO-REEF 2   GREAT TEXAS 4  
FAGIN 1   FOUCH 1   GEO-SOURCE 1   GREAT TEXAS CRUDE 24  
FAIN 9   FOUNDATION OIL 2   GEOCHEMICAL 66   GREAT WEST PET. 3  
FAIR 199   FOUNTAIN 8   GEODE 4   GREAT WESTERN 15  
FAIRVIEW 1   FOUR STAR 1   GEODOMINION PETROLEUM 43   GREATHOUSE 2  
FAIRWAY 8   FOUR-B TRUST 31   GEODYNAMICS 72   GREBIN 1  
FAITH 1   FOURTEEN-HUNDRED CORPORATION 1   GEOGRAPHIC 1   GREEHEY 3  
FALCO 2   FOWELL 1   GEOLOGICAL RESEARCH 21   GREEN 11  
FALCON 57   FOWLER 1   GEONATURAL RESOURCES 6   GREENBRIAR 1  
FALCONE 1   FOX 76   GEOPHYSICAL 10   GREENBRIER 59  
FALLEY 5   FRANCIS 5   GEORGE 8   GREENHILL 5  
FALLS 1   FRANCITAS 13   GEOSEARCH 5   GREENWOOD 2  
FALLS CITY 1   FRANK 1   GEOSOUTHERN 7   GREER 8  
FAMCOR 10   FRANKE 2   GEOTEK 1   GREGG 50  
FANCHER 3   FRANKEL 14   GERALD 2   GRELLING 16  
FANION 2   FRANKFORT 15   GERKER 1   GRETA 6  
FANSLER 1   FRANKLIN 26   GERMANY 1   GREY WOLF 6  
FANT 1   FRANKS 1   GERNER 1   GRIFFIN 5  
FAR 3   FRANZ 3   GERODETTI 1   GRIFFITH 7  
FAR WEST 3   FRASER 7   GERONIMO 40   GRIMES 13  
FARAGSON 1   FRAZER 2   GERTEX 1   GRIMM 6  
FARENTHOLD 33   FRAZIER 76   GES 5   GRISHAM 1  
FARGASON 6   FREDONIA 2   GETTY 264   GRISINGER 1  
FARGO 34   FREEDMAN 11   GIBLIN 1   GROFF 1  
FARISH 3   FREEMAN 48   GIBRALTAR 17   GROUP 9  
FARMERS 1   FREEPORT 1   GIBSON 20   GROVER 2  
FARMOR 2   FREER 3   GIDDENS 1   GROVER-MCKINNEY 1  
FARNEY 1   FREMONT 10   GIDEON 2   GRUBB 48  
FARNSWORTH 3   FRENCH OIL 28   GIEBEL 2   GRUBBS 1  
FARROW 1   FRENCH, L.D. 1   GIERHART 38   GRUBSTAKE 1  
FARSON 1   FRESNO 1   GIFFORD 8   GRUSS 2  
FASKEN 8   FRIDAY 5   GILBERT 1   GRUY 18  
FASSY 1   FRIO 115   GILBREATH 2   GUADALUPE 21  
FAULK 3   FRIO-TEX 65   GILCHRIST 1   GUARANTY 3  
FAYE 1   FROHNHOEFER 8   GILCREASE 85   GUARDIAN 25  
FAYETTE COUNTY 4   FRONTIER PETROLEUM 17   GILGER 12   GUENTHER 2  
FEAGIN 3   FROST 62   GILL 30   GUERNSEY 19  
FEAZEL 1   FRYER 1   GILLAND 1   GUEST 4  
FECH 1   FULK 2   GILLESPIE 39   GUFFEY 3  
FEDERAL INDUSTRIES 1   FULLER 52   GILLEY 1   GUIBERSON 2  
FEDERAL OIL 1   FULLERTON 5   GILLIAM 1   GUILBAULT 1  
FEDERAL ROYALTY 13   FULTON 4   GILLILAND 1   GUINN 2  
FEE OIL & GAS 1   FUNDAMENTAL OIL 3   GILLOCK 1   GULF AMERICAN 16  
FEHLHABER 1   FURNELL 1   GILLRING 107   GULF BOARD OIL 22  
FELAND 3   FURSE 1   GILMORE 1   GULF CANADA 4  
FELDERHOFF 7   FUSON 1   GILSTER 2   GULF COAST 140  
FELDMAN 20   FUTCH 1   GINCO 4   GULF ENERGY 92  
FELMONT 10   FUTURE EXPLORATION 6   GINGER 3   GULF INTERSTATE 11  
FELTNER 5   FUTURE PETROLEUM 4   GINTHER 168   GULF LAKES 1  
FENDER 8   G & H 2   GISSEL 1   GULF MINERALS 34  
FENN 16   G & M 3   GIST 2   GULF OIL 707  
FENNER 1   G & P 5   GIVENS 1   GULF PLAINS 29  
FENSTERMAKER 1   G & S 1   GLACIER 85   GULF PROD. 7  
FERGUSON 61   G A P 5   GLASCO 2   GULF RESOURCES 3  
FERRIER 4   G A S 11   GLASS 1   GULF SANDS 127  
FIDELITY 112   G C E A 5   GLASSCOCK 357   GULF SOUTH 12  
FIELD 9   G D ENERGY 1   GLASSEL 2   GULF STATES 52  
FIELD DRILLING 2   G D K 3   GLAZIER 1   GULF STREAM 12  
FIELDS 11   G E C 2   GLENCO 13   GULF TIDE 1  
FIFTEEN 2   G H J 4   GLENDA 11   GULFBOARD 2  
FIFTH ANDREWS 1   G H R 50   GLENN 22    
FIKES 3   G L G ENERGY 8   GLENN & ASSOCIATES 5    
FILON 12   G M T 1   GLENNCO 5    
FINA 103   G S I 2   GLENORA 4    
FINCH 2   G W R 2   GLENWAR 2    
FINDER 1   GABRIEL 2   GLO CO. 1    
Operator Count   Operator Count   Operator Count   Operator Count  
GULFCO 1   HAWKEYE 2   HOOKS 2   INTER-ALLIED 1  
GULFPORT 2   HAWKINS 115   HOOPER 3   INTERCOASTAL 30  
GULFSHORE 18   HAWLEY 76   HOOVER 39   INTERCONTINENTAL 3  
GULFSIDE 1   HAWN 312   HOPE 30   INTERNATIONAL 12  
GULFSTAR 22   HAWORTH 2   HOPE HILL 1   INTERNATIONAL NUCLEAR 14  
GULFSTREAM 25   HAWTHORN 15   HOPE PRODUCTION 1   INTERNATIONAL OIL & GAS 14  
GULFTON OIL 1   HAWTHORNE 6   HOPEHILL 7   INTERNATIONAL WESTERN 3  
GUM HOLLOW 1   HAYDEN 11   HOPF 1   INTERSTATE MINERALS 10  
GURLEY 1   HAYES 10   HOPI 3   INTEX 6  
GUTHRIE 3   HAYNES 83   HOPPER 1   INTRAMERICAN 11  
GUTIERREZ 11   HAYNESWORTH 1   HOPSON 10   INTREPID 6  
GYPSY 1   HAYPEC 7   HORIZON 5   INVESTEX 1  
H & H 3   HAYS 20   HORMACHEA 1   INVESTMENT VENTURES 3  
H & H DEVELOPMENT 1   HAZEL 2   HORN 100   INVESTORS NATURAL GAS 1  
H & H DRILLING 2   HAZELETT 4   HORNADAY 2   INVESTORS SYNDICATE OF SOUTHWEST 8  
H & J DRILLING 262   HAZLITT 1   HORNBECK 2   INVINCIBLE 1  
H & M 4   HEAD 6   HORNBERGER 5   IOWA-PAYNE 1  
H & N 1   HEAD & WELSH 34   HORNE 3   IRBY 3  
H & R 1   HEADINGTON 55   HORNER 2   IRENE 4  
H & S 10   HEADWATERS 2   HORNSBY 1   IRISH OIL 8  
H & W 7   HEARD 27   HORRIGAN 4   IRVING 7  
H A J J 7   HEARTLAND 3   HORSTING 3   IRWIN 9  
H C M 2   HEBERT 5   HORTON 2   ISBELL 1  
H C W 3   HECAR 1   HORVATH MILLS 1   IVEY TERRY 1  
H D & H 4   HEDGE 22   HOSKINS 15   IVY 3  
H D C 1   HEDLEY 11   HOTCHKIN 19   J & C 59  
H E & D 1   HEDRICK 5   HOU-TEX 16   J & D 2  
H E A 1   HEEMANN 1   HOUCHINS 1   J & E 1  
H E C I 13   HEEP OIL 167   HOUGEN 1   J & J 1  
H G I 3   HEID 7   HOUGH 7   J & M WELL SERVICE 14  
H L B 1   HEINZE 2   HOUSE 1   J & W OIL 1  
H M C 1   HELDENFELS 14   HOUSER 27   J A H 72  
H M S 5   HELIS 6   HOUSH 29   J B H 1  
H N G 186   HELLAND 37   HOUSTON 10   J B OIL & GAS 1  
H O R 1   HELMERICH 7   HOUSTON DOMESTIC 4   J F D 3  
H P R 1   HELVETIA 2   HOUSTON DRILLING 4   J H 1  
H R B OIL 2   HEMINGWAY 10   HOUSTON ENERGY 3   J H I 1  
H R H 3   HEMPHILL 1   HOUSTON EXPLORATION 43   J I L 5  
H S RESOURCES 4   HENDERSON 24   HOUSTON GULF 53   J J 1  
H T H 1   HENDRICKSON 2   HOUSTON INDEPENDENT 1   J J R S 1  
H V DRILLING 1   HENNA 1   HOUSTON MINERAL 10   J L RESOURCES 2  
H-M OIL 155   HENNIG 4   HOUSTON NATURAL GAS 112   J M C RESOURCES 2  
HAAS 205   HENNINGER 1   HOUSTON OIL 417   J M G FINANCIAL 1  
HABER 23   HENRY 30   HOUSTON OIL & MINERALS 125   J M M ENERGY 3  
HABERLE 2   HENSCH 2   HOUSTON OIL FIELDS 6   J O C OIL 1  
HADA 80   HENSHAW 145   HOUSTON OIL WELL SERVICE 7   J R B 1  
HADEN 2   HENSON 5   HOUSTON OPERATING 3   J R G 24  
HAGAN 6   HERCULES 8   HOUSTON PETROLEUM 24   J R OIL & GAS 1  
HAGEN 40   HERD 2   HOUSTON ROYALTY 33   J S & P OPERATING 1  
HAGEN-GREENBRIAR 1   HERITAGE 14   HOWARD 40   J S PETROLEUM 2  
HAGENS 11   HERLION 7   HOWELL 703   J T R 3  
HAGGARD 1   HERNDEN 3   HOWETH 154   J W P EXPLORATION 1  
HAGGARTY 1   HERNDON 16   HOXSEY 12   J W R 12  
HAIL 5   HERRING 28   HRBUTZ 1   J-3 OIL 53  
HAILEY 14   HERRINGTON 8   HUB CITY 1   J-O'B OPERATING 5  
HAJECATE 3   HERSCHAP 7   HUBBARD 4   J-W 41  
HALAMICEK 6   HERSCHBERGER 1   HUBBLE 10   J-WIL 2  
HALBOUTY 146   HERTON 1   HUBCO 2   J.A.H 1  
HALL 4   HERZSTEIN 1   HUBER 94   JACKSON 22  
HALL-HOUSTON 9   HESTER 10   HUBER, J.H. 1   JACOB 1  
HALLIBURTON 7   HETCO 6   HUBER, J.M. 9   JACOBS 14  
HALLMARK 5   HEWIT & DOUGHERTY 281   HUDDLE 10   JAD OIL 2  
HALLS CREEK 1   HEWITT 49   HUDGENS 4   JADE 6  
HALLWOOD 5   HEYNE 1   HUDGINS 13   JAMES ENERGY 1  
HAMBLEN 1   HEYSER 9   HUDSON 22   JAMESON 2  
HAMBY 2   HIAWATHA 230   HUENERS 1   JAMEX 50  
HAMCO 3   HIAWATHA(HOLLIDAY) 2   HUFF 2   JAMIN 15  
HAMILL 211   HIBBERT 18   HUFFCO 22   JANAN 10  
HAMILTON 90   HIBERNIA 1   HUFFINGTON 21   JANCO 2  
HAMM 6   HICKEY 1   HUFFMAN 1   JANE OIL 1  
HAMMAN 140   HICKOK 30   HUGHES 867   JANEX 2  
HAMMAX 1   HICKS 10   HUGHEY 6   JARBE 1  
HAMMER 2   HIDALGO 3   HUISACHE 109   JARMAN 1  
HAMMONDS 20   HIDALGO-WILLACY 3   HULSEY 5   JARMON 1  
HAMON 322   HIGGINS 3   HULVER 2   JARRELL 3  
HAMPTON 3   HIGH ISLAND 6   HUMBLE 5503   JAY-DEE 21  
HANCO OIL & GAS 1   HIGH PLAINS 10   HUMPHERY 8   JAY-LIN 6  
HANCOCK 8   HIGHLAND OIL 77   HUMPHRIES 16   JAYCO 3  
HANCORP 1   HIGHLAND RESOURCES 16   HUNDRED 2   JAYRED 2  
HAND 2   HILBURN 2   HUNE 1   JEDCO 5  
HANEY 1   HILCORP 24   HUNT 487   JEDSCO 1  
HANKAMER 67   HILL 229   HUNT HASSIE EXPL. 1   JEFFERS 1  
HANKEY 4   HILLCREST 26   HUNTER 30   JEFFERSON LAKE 25  
HANNA 1   HILLIARD 56   HUNTINGTON 5   JEFFRIES 1  
HANNAH 2   HILLIER 60   HURBROUGH 8   JENKINS 4  
HANOVER 14   HILLIN 1   HURD 71   JENNEY 3  
HANSLIP 5   HILLMAN 2   HURLBUT 22   JENNINGS 97  
HANSON 384   HILLSMAN 20   HURLEY 4   JERCO 2  
HANTHO-NELSON 1   HILLSMAN-GREENBURG 1   HURT 3   JERGINS 87  
HANTON 1   HILTY 19   HUSKY 23   JERGINS OF TEXAS 5  
HARBERT 1   HIME 1   HUTCHINS 15   JET 7  
HARBOR 1   HINDS 5   HUTSON 1   JETCO 1  
HARDIE 1   HINER 3   HYDEN 3   JETSTREAM 1  
HARDIN 11   HINES 4   HYDRO-CARBONS 10   JETTA 1  
HARDING 18   HINKLE 24   HYDROCARBON EXPLORATION 1   JILPETCO 1  
HARDWICK 29   HINSON 15   HYDROCARBON GATHERING 14   JIMCO 1  
HARDWICKE 10   HINTON 16   HYDROCARBON HORIZONS 9   JOBST 4  
HARDY 1   HISTORICAL 2   HYDROCARBON MGMT. 1   JOCELYN 2  
HARGEST 3   HIXON 2   HYDROCARBON OPERATING 6   JOCELYN-VARN 58  
HARGIS 9   HOBBY 4   HYDROCARBON PROD 2   JOHANSON 2  
HARGRAVE 27   HOBLITTZELLE 1   HYDROCARBON PROD. 17   JOHNSON 114  
HARGROVE 4   HOBLITZELLE 1   HYDROCARBON TRANSMISSION 1   JOHNSTON 30  
HARING 130   HOBSCO 3   HYLAND 1   JOJON 1  
HARKEN 8   HODGE 9   HYNES 15   JOLLEY 1  
HARKINS 591   HODGES 1   HYQUEST 67   JONES 157  
HARLEY 3   HOFFER 5   HYSO 1   JONES CREEK 1  
HARMON 1   HOFFMAN 1   HYTECH 13   JONNELL 25  
HARMONY 5   HOFHEINZ 1   I M C 4   JORDAN 14  
HARPER 43   HOGAN 5   I M E F 1   JOSEY 59  
HARPER HEFTE 44   HOLBERT 1   I O C 8   JOYCE 2  
HARPER, SAM H. 1   HOLBROOK 5   I O G 2   JOYCE & HILTY 16  
HARPER-SMITH 28   HOLCOMB 1   I P PETROLEUM 9   JUANITA 1  
HARRELL 50   HOLDEN 22   I T R 2   JUDARTH 2  
HARRELL & SOUTHWORTH 15   HOLEMAN 1   IBERIA 1   JUDD 3  
HARRINGTON 2   HOLIDAY RESOURCES 13   ICARUS 6   JUPITER 15  
HARRIS 19   HOLLAND 93   IDAHO 3   JUSTISS-WEARS 1  
HARRIS-FUNK 1   HOLLIDAY 7   ILLINOIS PETROLEUM 26   K & A 21  
HARRISON 201   HOLLIMON 53   IMPACT 1   K & H 55  
HARRISON, DAN J., JR. 7   HOLLIS 2   IMPERIAL 15   K & K 2  
HARROB 1   HOLLOWAY 51   INCA 22   K & N 1  
HARROUN 2   HOLLUB 26   INCO 1   K & S 2  
HARRUS 6   HOLLY 68   INDEPENDENCE 2   K B 34  
HART 20   HOLMES 55   INDEPENDENT 22   K C 1  
HARTEX 1   HOLOTIK 2   INDEXGEO 41   K C S 25  
HARTMAN 1   HOLT 2   INDIOLA 2   K D ENERGY 1  
HARVARD 2   HOLTZCLAW 1   INDUSTRIAL 16   K L S 1  
HARVEY 46   HOMA 4   INEXCO OIL 91   K M D 2  
HARWOOD 48   HOMABY 7   INGRAM 1   K O G OPERATING 24  
HASBRO 1   HOME 22   INLAND 34   K O T 1  
HASCHKE 4   HONCHO 8   INLAND EXPLORATION 1    
HASEMAN 1   HONDO 2   INLAND OCEAN 52    
HASSELMAN 1   HONOLULU 1   INLAND PETROLEUM 2    
HAUSER 14   HONOR 1   INMAN 1    
HAVENS 1   HOOD 2   INTEGRAL 100    
HAWK 1   HOOKER 2   INTEGRATED OPERATOR 3    
Operator Count   Operator Count   Operator Count   Operator Count  
K P EXPLORATION 13   KRASNER 7   LEECO 1   LYMAN, C.V. 1  
K R M 18   KRAUSE 1   LEEDE 7   LYNAL 1  
K T X 4   KRCHNAK 1   LEFEVRE 6   LYNBROOK 4  
K W B 1   KRENEK 2   LEGACY 57   LYNCH 34  
K-2 1   KRESCENT 1   LEGEND 5   LYNCO 3  
K-N OPERATING 6   KRITI 1   LEGER 12   LYND 10  
KA-HUGH 24   KRUEGER 1   LEHMERTZ 1   LYNDEL 1  
KA-MATT 3   KRUIDENIER 1   LEMARCO 17   LYNN 8  
KADANE 2   KRUSEN 1   LENSGRAF 1   LYNTON 1  
KAISER OIL 13   KRYSTAL-LIN 1   LENT 1   LYNX 4  
KAISER-FRANCIS 29   KUBELA 1   LEONA 1   LYONS 51  
KALER ENERGY 66   KUEBLER 1   LEONARD 18   LYTLE CREEK 5  
KALLIES 1   KUENSTLER 8   LEONE 2   M & B 5  
KALLINA 44   KUHNS 2   LEPOVITZ 1   M & F D C 1  
KALON 1   KUMLER 10   LERN 2   M & G OPERATING 5  
KALSEA 1   KUNETKA 1   LES TEXAS 3   M & R EXPLORATION 1  
KAMLOK 11   KUYPCO 2   LESH 9   M & S 1  
KANE 3   KUYPERS 13   LESKO 1   M & W 15  
KANEB 2   KYLE 1   LESS 1   M C A 20  
KANELLOS 1   L & A ENERGY 4   LEUSCHNER 1   M C O R 7  
KANSAS 1   L & B OIL 12   LEVERIDGE 6   M C OIL 9  
KARBUHN 2   L & F 10   LEVINSON 1   M C S 2  
KARCHER 2   L & L PETROLEUM 70   LEVY 1   M C Z 10  
KARNCO 5   L & M 1   LEWIS 196   M G EXP 8  
KARNES 4   L & T 1   LEWIS PETRO 14   M G F 60  
KARSTEN 76   L & W 2   LEXINGTON 2   M G U 2  
KASAN 2   L B N 3   LEY 13   M H 2  
KATE 1   L G D C 7   LIBERTY 23   M IV OPS 2  
KATZ 293   L G J 6   LICO 2   M J C 2  
KAULBACH 9   L L T 1   LIEBMAN-GIBSON 2   M J G 37  
KAYE 3   L M N 5   LIFESTYLE 19   M K 24  
KAYLIN 1   L M P 8   LIGHT 3   M K N 4  
KEAHEY 10   L N R 1   LIGHTHOUSE 7   M L 1  
KEARNEY 1   L R F 1   LIGHTNING 67   M L C 1  
KEATOR 1   L TEXAS 37   Lignite 1   M L RESOURCES 5  
KEBO 155   L V O 1   LILES 1   M M C 2  
KECK 4   L X EXPLORATION 1   LIMES 3   M P G 12  
KEEHAN 2   LA CAMPBELL 3   LIMESTONE 3   M P PETROLEUM 1  
KEEL 1   LA COASTAL 21   LINCOLN 2   M P S 74  
KEEMAC 4   LA GLORIA 293   LINDA 1   M R EXPLORATION 1  
KEENE 5   LA GORCE 6   LINDEMUTH 1   M R T 1  
KEETON 1   LA HOLLO 5   LINDER 5   M W J 5  
KEFT OIL 1   LA JET 4   LINDHOLM 16   M W PETROLEUM 10  
KEG 11   LA JITA 8   LINGEN 22   M W R 1  
KEGLEY 1   LA JOLLA 4   LINK 8   M-G GAS CO 1  
KELJIKAN 4   LA JOYA 1   LINK OIL &GAS 1   M-L INC. 2  
KELLER 2   LA NELLE 2   LINKENHOGER 1   M-TEX 7  
KELLEY 12   LA PARITA 9   LINNE 6   M-V 6  
KELLY 31   LA PRYOR 2   LION 14   MABEE 21  
KELPETRO 8   LA ROCA RESOURCES 1   LIPAN 2   MABRY 2  
KELSEY 21   LA ROSA 16   LIPSCOMB 9   MAC DRILLING 6  
KELSO 3   LA RUE 2   LISSIE 1   MAC'S DRILLING 5  
KEMP 2   LA SALLE 8   LITTLE 70   MACDIARMID 1  
KEMPER GLICK 1   LA TERRE 3   LITTLE GIANT 4   MacDONALD 19  
KEN 53   LAB OIL 21   LITTLEFIELD 2   MACEO 8  
KEN-KAN 2   LABELLE 3   LITTLEPAGE 1   MACERO 23  
KENDALL 7   LACAL 19   LITTLETON 1   MACHII-ROSS 14  
KENERGY 3   LACEY 19   LIVE OAK 11   MACHIN 3  
KENNARD 45   LACK 2   LIVELY 45   MACK 3  
KENNE 1   LACY 46   LIVINGSTON 2   MACKEY 9  
KENNECOTT 1   LADD 133   LLOG 1   MACKHANK 55  
KENNEDY 9   LAGARTO 1   LLOYD 8   MACLANE 1  
KENNON 1   LAGERQUIST 4   LOBAR 2   MACNAUGHTON 1  
KENTEX 3   LAGO 4   LOBO 90   MACPET 17  
KENYON 16   LAGUNA 1   LOCAL 10   MACQUEST 1  
KEPLEY 9   LAHOMA 1   LOCHRIDGE 2   MADDOX 2  
KEPLINGER 1   LAIN 1   LOCKE 2   MADDUX 5  
KEPPLER 1   LAIRD 1   LOCKHART 185   MADERA 8  
KERN 1   LAKE 11   LOCO 1   MADRID 17  
KERNS 5   LAKE RONEL 14   LOFCO 2   MADRONE 3  
KERR-MCGEE 29   LAKEVIEW 1   LOFFLAND 9   MAER 1  
KEWANEE OIL 9   LAKEWOOD 15   LOFLIN 3   MAGALIS 1  
KEY 2   LAMMERTS 2   LOGUE 244   MAGEE 2  
KEYSTONE 7   LAMONT 2   LOHMAN 1   MAGGERT 6  
KGMH 1   LANCE 6   LOKEY 1   MAGNA 3  
KIBBE 17   LAND RESOURCES 6   LOMA ALTA 1   MAGNETIC 1  
KIDD 25   LANDA 1   LOMA OIL 10   MAGNOLIA 1918  
KIEL 36   LANDES 3   LOMA VERDE 1   MAGNUM 48  
KILGORE 37   LANDMARK 1   LOMAC 1   MAGUIRE 163  
KILGORE & ATLANTIC 1   LANDRESS 4   LOMACK 1   MAIN 3  
KILGORE & COFFEE 1   LANDRETH 9   LOMAK 9   MAJESTIC 3  
KILGORE-TURNER 1   LANDRUM 6   LONDON PETROLEUM 2   MAJO 3  
KILLAM 949   LANG 44   LONE OAK 3   MAJOR 15  
KILLINGER 1   LANGHAM 6   LONE STAR 316   MALLARD 7  
KILLINGSWORTH 1   LANIER 1   LONG 29   MALLORY 1  
KILMARNOCK 2   LANKARD 1   LONG BROTHERS 8   MALOMAR 1  
KILROY 170   LANN 2   LONG TRUSTS 1   MAN-GAS 2  
KIMBALL 3   LANNING 3   LONGHORN 83   MANA 30  
KIMBARK 1   LANNING-COFFIELD 1   LOONEY 2   MANAHAN 7  
KIMBELL 2   LANTANA 15   LOPEZ 1   MANCO 42  
KIMMEL 1   LAPO 1   LORDSTONE 1   MANDARIN 16  
KIMMELL 5   LARCO 2   LOS GATOS 17   MANECO 3  
KIMMEY 41   LAREDO 2   LOS NIETOS 5   MANETAS 1  
KIN-ARK 2   LAREDO ENERGY 4   LOTT 1   MANFORTH 3  
KING 124   LAREDO WATER WORKS 1   LOU LITTLE 1   MANFRED 11  
KING-HOARD 1   LARIO 10   LOUDON 13   MANGES 45  
KING-TEX 3   LARKINS 2   LOUIS DREYFUS 62   MANGUM 19  
KINGDOOR 1   LAROCA 1   LOUISANA GAS 3   MANLER 1  
KINGWOOD 24   LAROCA RESOURCES 5   LOUISANA LAND 1   MANLEY 44  
KINLAW 4   LAROCO LLP 16   LOUISIANA CAMPBELL ENERGY 1   MANNING 12  
KINLEY 2   LARON 4   LOUISIANA GENERAL PETROLEUM 11   MANOR 10  
KINNEAR 2   LARS 1   LOUISIANA LAND & EXPL 15   MANRY 2  
KINS 7   LARSEN 2   LOUISIANA NATURAL 1   MANTI 58  
KINSEL 1   LARUE 2   LOUISIANA OIL REFINING 1   MANTLE 1  
KINSEY INTEREST 3   LAS TECAS 1   LOVE 6   MAPCO 5  
KIOWA 11   LASITER 1   LOVE & SUN 1   MAPLES 1  
KIRBY 105   LASMO ENERGY 1   LOVELADY 57   MAR 4  
KIRK 2   LATIMER 2   LOWE 16   MAR-TEX 2  
KIRKPATRICK 108   LATTNER 12   LOWER COLORADO RIVER AUTHORITY 2   MARALO 6  
KIRKSMITH 4   LAUGHLIN 41   LOWMAR 3   MARAN 6  
KIRKWOOD 589   LAUREL 8   LOWRANCE 1   MARATHON 79  
KIRKWOOD & MORGAN 1   LAURITZEN 11   LU-TEX 4   MARCELL 1  
KISSINGER 9   LAVACA 7   LUBBOCK COTTON 2   MARCH 1  
KLABZUBA 8   LAWBAR 44   LUCAS 1   MARDAM 13  
KLEBERG 3   LAWLER 2   LUCEY 6   MARGO 2  
KLEIN 1   LAWLESS 9   LUCK PETROLEUM 1   MARIAH 3  
KLEINER 7   LAWLOR 7   LUCKY 6   MARINE 19  
KLING 20   LAWRENCE 2   LUETH 1   MARINE GATHERING 2  
KLOSTER 1   LAWSON 1   LUHN 1   MARINER 2  
KLOTZMAN 25   LAY 2   LUKER 1   MARINO 6  
KNICKERBOCKER 1   LAYNE TEXAS 10   LULING 148   MARION 25  
KNIGHT 3   LAZARUS 1   LULOC 2   MARK IV 43  
KNOTT 1   LE CUNO 6   LUNDBERG 36   MARK PRODUCING 4  
KNOX 2   LEACH 7   LUNDELL 23   MARKHAM 1  
KOBA 4   LEAHY 4   LUNDELLS 22   MARKS 28  
KOCH 1   LEAKE 1   LUNDIN 1   MARLAND 1  
KODIAK 2   LEAR 13   LURA 1   MARLEX 1  
KOENIG 2   LEARY 1   LUSK 2   MARLIN 5  
KOLLMAN 1   LEATHERWOOD 1   LUSKEY 1   MARLINE 9  
KOSAREK 6   LEBEN 1   LUTTES 1    
KOSSA 1   LECHE 1   LYDA 1    
KOTTICK 1   LECUNO 2   LYLES 9    
KRAAK 2   LEDGE 1   LYMAN 88    
KRAFTEX 2   LEDLOW 2   LYMAN DAMASCUS 2    
KRAGSETH 2   LEE 63   LYMAN(TEXON) 1    
Operator Count   Operator Count   Operator Count   Operator Count  
MARMADUKE 6   MEADOW VIEW 2   MONTERREY 35   NETTLECOMBE 1  
MARQUEE 100   MEANS 6   MONTGOMERY 3   NETWORK 1  
MARR 4   MEBANE 4   MOODY 19   NEUHAUS 79  
MARRIOTT 1   MECEY 1   MOORE 193   NEUMANN 1  
MARSH 65   MECO 8   MOORINGSPORT 5   NEUMIN 146  
MARSHALL 55   MECOM 90   MOOSE 27   NEW 1  
MARSTON 4   MED-TEX 6   MORAN 56   NEW CENTURY 14  
MARTEX 4   MEDALLION 7   MORCO 3   NEW HORIZON 1  
MARTIN 192   MEDDERS 5   MORELAND 1   NEW HORIZONS 1  
MARTIN-BAKER 3   MEEK 2   MOREOIL 1   NEW SEVEN FALLS 5  
MARTINETS 1   MEEKER 39   MORGAN 590   NEW ULM 4  
MARTS 1   MEEKS 1   MORGAN-GULF 4   NEW-TEX 2  
MARYE 5   MEGA 1   MORLAS 1   NEWFIELD 4  
MARYLAND 19   MEGAHAN 3   MORMAC 256   NEWFIELD EXPLORATION 79  
MARZO 2   MEGO 2   MORRE 1   NEWGULF 3  
MASCOT 9   MEJLAENDER 2   MORRIS 33   NEWHALL 2  
MASIRAN 2   MELBA 43   MORRISON 9   NEWITT 18  
MASON 26   MELLARD 1   MORROW 1   NEWMAN 188  
MASS ENERGY 1   MELLON 32   MORSE 4   NEWMONT 3  
MASSENGILL 2   MELMERICH 1   MORSEY 11   NEWPORT 4  
MASSEY 2   MELTON 2   MORTCO 1   NEWTON 55  
MASSINGILL 61   MEMORIAL EXPLORATION 1   MORTEX 3   NICCO 2  
MASTEN 2   MENGDEN 28   MORTIMER 79   NICHOLLS 1  
MASTERSON 3   MENGER 1   MORTON 3   NICHOLS 7  
MATADOR 2   MERCURY 16   MOSBACHER 242   NICHOLSON 3  
MATAGORDA 12   MEREDITH 79   MOSELEY 21   NICKEL 1  
MATHEWS 3   MERIDIAN 63   MOSELLE 1   NICKLOS 7  
MATHIS 1   MERIT 13   MOSS 29   NIELSEN 4  
MATLOCK 2   MERREN 2   MOSS & ADAMS 1   NIMROD 1  
MATRIX 1   MERRICK 28   MOSS & WATSON 4   NIX 1  
MATTHEWS 4   MERRITT 13   MOSSER 81   NIXON 12  
MATTKE 1   MERY 1   MOTCO 3   NOACK 1  
MATZINGER 29   MESA 37   MOTEX 43   NOAKE 1  
MAUCH 1   MESA CHICA 2   MOTI 1   NOBB 2  
MAUDLOWE 2   MESQUITE 14   MOTT 7   NOBLE 39  
MAURER 1   MESSENGER 1   MOULDEN 1   NOBLESON 9  
MAVERICK 35   MESSER 15   MOULTON 7   NOLA OIL & GAS 1  
MAXIMA 6   MESSERS CO. 4   MOUND 26   NOLAN 1  
MAXUS 10   MESTENA 54   MOUNT 8   NOLEN 8  
MAXWELL 11   METALS SERVICE 11   MOUNTAIN TOWNSITE 1   NOMECO 4  
MAY 36   METANO ENERGY 7   MOWINCKLE 6   NOR-AM 4  
MAYAN 1   METCO 3   MOWINKLE 11   NOR-MAC-BURNS 1  
MAYCO 1   METRO 1   MS GUIDANCE 1   NORANDA 4  
MAYFAIR 53   METROPOLITAN OIL 8   MUDGE 5   NORBLA 1  
MAYFIELD 15   METTS 1   MUELLER 227   NORCEN 1  
MAYNARD 36   MEYERS 27   MUGG 1   NORCOFF 1  
MAYNE 4   MIAMI 20   MULE 2   NORCROSS 1  
MAYO 34   MICHAEL 124   MULLE 3   NORDAN 22  
MAYS 1   MICHAUX 39   MULTI-ENERGY 1   NORDIC 2  
MAZURICK 1   MICHEL 2   MULVER 1   NOREMAC 6  
McALESTER 13   MICHELSON 21   MUNDY 1   NORINO 1  
McALISTER 1   MID AMERICA 2   MUNN 1   NORMANDIE 5  
McALL 3   MID COAST 3   MUNSON 3   NORMANDY 14  
McALPIN 3   MID CONTINENTAL 1   MURCHISON 20   NORRIS 20  
McBEE 13   MID GULF 2   MURCO 1   NORSWORTHY 14  
McBRAYER 1   MID KANSAS 1   MURDICK 1   NORTEX 21  
McBRIDE 107   MID-AMERICAN 24   MUREXO 6   NORTH 2  
McCABE 56   MID-CENTURY 3   MURLYNSON 9   NORTH AMERICAN 109  
McCAIN 1   MID-CONTINENT 25   MUROC 1   NORTH CENTRAL 173  
McCALEB 15   MID-STATES 2   MURPHEY 26   NORTH PADRE EXPL 2  
McCAMERON 1   MID-TEXAS 7   MURPHY 20   NORTH PETTUS 14  
McCAMEY 1   MIDAS 3   MURRAY 25   NORTH ROSS OIL 1  
McCANDLESS 1   MIDDLETON 10   MURRELL 1   NORTH SHORE 7  
McCARRICK 56   MIDHURST 19   MURRY 1   NORTH STAR 13  
McCARTER 38   MIDLAND 40   MUSS 5   NORTH TEXAS 5  
McCARTHY 96   MIDSTATES 86   MUSSELMAN 29   NORTHERN MICHIGAN 7  
McCARTY 1   MIDTEX 1   MUSTANG 69   NORTHERN NATURAL 10  
McCLAIN 71   MIDWAY 26   MUSTEEN 7   NORTHERN ORDINANCE 9  
McCLUNG 3   MIDWEST 81   MUTEX 1   NORTHERN PUMP 116  
McCOLLUM 7   MIERS 1   MUTUAL OIL 6   NORTHSTAR 3  
McCOMBS 8   MIHOVAL 1   MYER 1   NORTHWEST ARKANSAS 1  
McCORD 43   MIKTON 3   MYERS 5   NORTHWEST OIL 4  
McCORMICK 172   MILAGRO 10   N E G 6   NORTON 55  
McCRACKEN 2   MILAM 14   N F C PETROLEUM 1   NOUVELLE 1  
McCRIGHT 2   MILES 8   N F OIL 1   NOVA ENERGY 2  
McCULLOCH 17   MILESTONE 22   N G C ENERGY 1   NOVUS OIL 1  
McCULLOUGH 7   MILHAM 1   N M-YATES 1   NOVUS OIL & GAS 1  
McCURDY 20   MILLER 304   N P ENERGY TEXAS 12   NOYES 1  
McCUTCHIN 6   MILLER & DONZIS 1   N P U UNION PRODUCING 1   NU-ENAMEL 1  
MCDADE 1   MILLER & FOX 29   N R G 6   NU-SAN 5  
McDANIEL 4   MILLER & PIERCE 25   N R M 3   NUCORP 49  
McDANNALD 39   MILLICAN 77   N R M C 1   NUECES COMPANY 11  
McDERMOTT 37   MILLS 1   N S T 1   NUECES MINERALS 4  
McDONALD 23   MILLSAP 9   NAFCO 2   NUECES OIL 15  
McDONNOLD 2   MILNER 7   NAILS CREEK 1   NUECES RESERVES 2  
McDOUGAL 2   MILO 1   NAIVAR 1   NUECES ROYALTY 7  
McDOWELL 3   MILTEX 5   NANJO 1   NUECO 1  
McDRILLING 2   MIM 11   NAPECO 9   NUEVE 13  
McELVAIN 8   MIN-TEX 3   NARECO 1   NUGENT 6  
McFADDEN 8   MINAHAN 1   NARMCO 1   NUGGET 46  
McFADDIN 1   MINDEN 8   NASA 1   NULL 87  
McFARLAND 38   MINER 14   NASH 2   NUTECH 1  
McFARLANE 33   MINERAL DEVELOPMENT 1   NATIONAL ASSOCIATED 5   NUTEX 3  
MCGAHEY 1   MINERAL PROJECTS 2   NATIONAL BULK 2   O G P OPERATING 7  
McGALLIARD 10   MINERAL RESOURCES 1   NATIONAL DRILLING 3   O H B 8  
McGARR 43   MINERALS EXPLORATION 1   NATIONAL ENERGY 4   O K WELL SERVICE 2  
McGEHEE 1   MINERALS OF TEXAS 2   NATIONAL EXPLORATION 41   O S R 1  
McGLOTHLIN 1   MINTON 4   NATIONAL GULF 1   O'BRANNON 1  
McGOLDRICK 3   MINUTEMAN 1   NATIONAL INVESTOR 1   O'BRYNE 1  
McGORICK-SMITH 1   MIRADA 4   NATIONAL OIL 29   O'BYRNE 2  
McGOWAN 12   MIRAMAR 41   NATIONAL ONSHORE 6   O'CONNOR 4  
McGREGOR 14   MIRANDO CRUDE 1   NATIONAL OPERATING 1   O'DONNELL 1  
McGUFFIN 10   MISSION 11   NATIONAL PETROLEUM 5   O'HERN 10  
McGUIRE 1   MISSION RESOURCES 1   NATIONAL PIPE & SUPPLY 1   O'HORNETT 4  
McHENRY 1   MISSION RIVER 6   NATIONAL RESOURCES 3   O'LEARY 2  
McHUGH 5   MITCHAMORE 7   NATOMAS 8   O'MEARA 1  
McIVER 2   MITCHELL 231   NATURA ENERGY 2   O'MELVENY 26  
McKAY 1   MIZEL 4   NATURAL ENERGY 7   O'NEAL 4  
McKEE 2   MO-JON 9   NATURAL GAS 9   O'NEAL-CHANCELLOR 1  
McKENZIE 24   MOBIL 553   NATURAL RESERVES