|
US3123160A
(en)
*
|
|
1964-03-03 |
|
Retrievable subsurface well bore apparatus |
|
US3006415A
(en)
|
|
1961-10-31 |
|
Cementing apparatus |
|
US179973A
(en)
|
|
1876-07-18 |
|
Improvement in tubing-clutches |
|
US122514A
(en)
|
|
1872-01-09 |
|
Improvement in rock-drills |
|
US3124023A
(en)
*
|
|
1964-03-10 |
|
Dies for pipe and tubing tongs |
|
US1077772A
(en)
|
1913-01-25 |
1913-11-04 |
Fred Richard Weathersby |
Drill.
|
|
US1185582A
(en)
|
1914-07-13 |
1916-05-30 |
Edward Bignell |
Pile.
|
|
US1301285A
(en)
|
1916-09-01 |
1919-04-22 |
Frank W A Finley |
Expansible well-casing.
|
|
US1342424A
(en)
|
1918-09-06 |
1920-06-08 |
Shepard M Cotten |
Method and apparatus for constructing concrete piles
|
|
US1414207A
(en)
|
1920-07-06 |
1922-04-25 |
Frank E Reed |
Shaft coupling
|
|
US1471526A
(en)
|
1920-07-19 |
1923-10-23 |
Rowland O Pickin |
Rotary orill bit
|
|
US1418766A
(en)
|
1920-08-02 |
1922-06-06 |
Guiberson Corp |
Well-casing spear
|
|
US1585069A
(en)
|
1924-12-18 |
1926-05-18 |
William E Youle |
Casing spear
|
|
US1728136A
(en)
|
1926-10-21 |
1929-09-10 |
Lewis E Stephens |
Casing spear
|
|
US1830625A
(en)
|
1927-02-16 |
1931-11-03 |
George W Schrock |
Drill for oil and gas wells
|
|
US1805007A
(en)
|
1927-12-27 |
1931-05-12 |
Elmer C Pedley |
Pipe coupling apparatus
|
|
US1777592A
(en)
|
1929-07-08 |
1930-10-07 |
Thomas Idris |
Casing spear
|
|
US1998833A
(en)
|
1930-03-17 |
1935-04-23 |
Baker Oil Tools Inc |
Cementing guide
|
|
US1825026A
(en)
|
1930-07-07 |
1931-09-29 |
Thomas Idris |
Casing spear
|
|
US1842638A
(en)
*
|
1930-09-29 |
1932-01-26 |
Wilson B Wigle |
Elevating apparatus
|
|
US1880218A
(en)
|
1930-10-01 |
1932-10-04 |
Richard P Simmons |
Method of lining oil wells and means therefor
|
|
US1917135A
(en)
|
1932-02-17 |
1933-07-04 |
Littell James |
Well apparatus
|
|
US2105885A
(en)
|
1932-03-30 |
1938-01-18 |
Frank J Hinderliter |
Hollow trip casing spear
|
|
US2049450A
(en)
|
1933-08-23 |
1936-08-04 |
Macclatchie Mfg Company |
Expansible cutter tool
|
|
US2017451A
(en)
|
1933-11-21 |
1935-10-15 |
Baash Ross Tool Co |
Packing casing bowl
|
|
US1981525A
(en)
|
1933-12-05 |
1934-11-20 |
Bailey E Price |
Method of and apparatus for drilling oil wells
|
|
US2060352A
(en)
|
1936-06-20 |
1936-11-10 |
Reed Roller Bit Co |
Expansible bit
|
|
US2128430A
(en)
|
1937-02-08 |
1938-08-30 |
Elmer E Pryor |
Fishing tool
|
|
US2167338A
(en)
|
1937-07-26 |
1939-07-25 |
U C Murcell Inc |
Welding and setting well casing
|
|
US2184681A
(en)
|
1937-10-26 |
1939-12-26 |
George W Bowen |
Grapple
|
|
US2216895A
(en)
|
1939-04-06 |
1940-10-08 |
Reed Roller Bit Co |
Rotary underreamer
|
|
US2228503A
(en)
*
|
1939-04-25 |
1941-01-14 |
Boyd |
Liner hanger
|
|
US2214429A
(en)
|
1939-10-24 |
1940-09-10 |
William J Miller |
Mud box
|
|
US2324679A
(en)
|
1940-04-26 |
1943-07-20 |
Cox Nellie Louise |
Rock boring and like tool
|
|
US2305062A
(en)
|
1940-05-09 |
1942-12-15 |
C M P Fishing Tool Corp |
Cementing plug
|
|
US2295803A
(en)
|
1940-07-29 |
1942-09-15 |
Charles M O'leary |
Cement shoe
|
|
US2370832A
(en)
*
|
1941-08-19 |
1945-03-06 |
Baker Oil Tools Inc |
Removable well packer
|
|
US2379800A
(en)
|
1941-09-11 |
1945-07-03 |
Texas Co |
Signal transmission system
|
|
US2414719A
(en)
*
|
1942-04-25 |
1947-01-21 |
Stanolind Oil & Gas Co |
Transmission system
|
|
US2522444A
(en)
|
1946-07-20 |
1950-09-12 |
Donovan B Grable |
Well fluid control
|
|
US2641444A
(en)
|
1946-09-03 |
1953-06-09 |
Signal Oil & Gas Co |
Method and apparatus for drilling boreholes
|
|
US2499630A
(en)
*
|
1946-12-05 |
1950-03-07 |
Paul B Clark |
Casing expander
|
|
US2668689A
(en)
*
|
1947-11-07 |
1954-02-09 |
C & C Tool Corp |
Automatic power tongs
|
|
US2570080A
(en)
|
1948-05-01 |
1951-10-02 |
Standard Oil Dev Co |
Device for gripping pipes
|
|
US2621742A
(en)
|
1948-08-26 |
1952-12-16 |
Cicero C Brown |
Apparatus for cementing well liners
|
|
US2536458A
(en)
|
1948-11-29 |
1951-01-02 |
Theodor R Munsinger |
Pipe rotating device for oil wells
|
|
US2595902A
(en)
|
1948-12-23 |
1952-05-06 |
Standard Oil Dev Co |
Spinner elevator for pipe
|
|
US2720267A
(en)
|
1949-12-12 |
1955-10-11 |
Cicero C Brown |
Sealing assemblies for well packers
|
|
US2582987A
(en)
|
1950-01-26 |
1952-01-22 |
Goodman Mfg Co |
Power winch or hoist
|
|
US2610690A
(en)
|
1950-08-10 |
1952-09-16 |
Guy M Beatty |
Mud box
|
|
US2627891A
(en)
*
|
1950-11-28 |
1953-02-10 |
Paul B Clark |
Well pipe expander
|
|
US2743495A
(en)
|
1951-05-07 |
1956-05-01 |
Nat Supply Co |
Method of making a composite cutter
|
|
US2765146A
(en)
|
1952-02-09 |
1956-10-02 |
Jr Edward B Williams |
Jetting device for rotary drilling apparatus
|
|
US2805043A
(en)
|
1952-02-09 |
1957-09-03 |
Jr Edward B Williams |
Jetting device for rotary drilling apparatus
|
|
US2650314A
(en)
|
1952-02-12 |
1953-08-25 |
George W Hennigh |
Special purpose electric motor
|
|
US2764329A
(en)
|
1952-03-10 |
1956-09-25 |
Lucian W Hampton |
Load carrying attachment for bicycles, motorcycles, and the like
|
|
US2663073A
(en)
|
1952-03-19 |
1953-12-22 |
Acrometal Products Inc |
Method of forming spools
|
|
US2743087A
(en)
|
1952-10-13 |
1956-04-24 |
Layne |
Under-reaming tool
|
|
US2738011A
(en)
*
|
1953-02-17 |
1956-03-13 |
Thomas S Mabry |
Means for cementing well liners
|
|
US2741907A
(en)
|
1953-04-27 |
1956-04-17 |
Genender Louis |
Locksmithing tool
|
|
US2692059A
(en)
|
1953-07-15 |
1954-10-19 |
Standard Oil Dev Co |
Device for positioning pipe in a drilling derrick
|
|
US2965177A
(en)
|
1957-08-12 |
1960-12-20 |
Wash Overshot And Spear Engine |
Fishing tool apparatus
|
|
US2978047A
(en)
|
1957-12-03 |
1961-04-04 |
Vaan Walter H De |
Collapsible drill bit assembly and method of drilling
|
|
US3054100A
(en)
|
1958-06-04 |
1962-09-11 |
Gen Precision Inc |
Signalling system
|
|
US3159219A
(en)
|
1958-05-13 |
1964-12-01 |
Byron Jackson Inc |
Cementing plugs and float equipment
|
|
US3087546A
(en)
|
1958-08-11 |
1963-04-30 |
Brown J Woolley |
Methods and apparatus for removing defective casing or pipe from well bores
|
|
US2953406A
(en)
|
1958-11-24 |
1960-09-20 |
A D Timmons |
Casing spear
|
|
US3041901A
(en)
|
1959-05-20 |
1962-07-03 |
Dowty Rotol Ltd |
Make-up and break-out mechanism for drill pipe joints
|
|
US3090031A
(en)
|
1959-09-29 |
1963-05-14 |
Texaco Inc |
Signal transmission system
|
|
US3117636A
(en)
*
|
1960-06-08 |
1964-01-14 |
John L Wilcox |
Casing bit with a removable center
|
|
US3111179A
(en)
|
1960-07-26 |
1963-11-19 |
A And B Metal Mfg Company Inc |
Jet nozzle
|
|
US3102599A
(en)
|
1961-09-18 |
1963-09-03 |
Continental Oil Co |
Subterranean drilling process
|
|
US3191680A
(en)
|
1962-03-14 |
1965-06-29 |
Pan American Petroleum Corp |
Method of setting metallic liners in wells
|
|
US3131769A
(en)
|
1962-04-09 |
1964-05-05 |
Baker Oil Tools Inc |
Hydraulic anchors for tubular strings
|
|
US3122811A
(en)
*
|
1962-06-29 |
1964-03-03 |
Lafayette E Gilreath |
Hydraulic slip setting apparatus
|
|
US3266582A
(en)
|
1962-08-24 |
1966-08-16 |
Leyman Corp |
Drilling system
|
|
US3169592A
(en)
*
|
1962-10-22 |
1965-02-16 |
Lamphere Jean K |
Retrievable drill bit
|
|
US3193116A
(en)
|
1962-11-23 |
1965-07-06 |
Exxon Production Research Co |
System for removing from or placing pipe in a well bore
|
|
US3191683A
(en)
|
1963-01-28 |
1965-06-29 |
Ford I Alexander |
Control of well pipe rotation and advancement
|
|
US3191677A
(en)
|
1963-04-29 |
1965-06-29 |
Myron M Kinley |
Method and apparatus for setting liners in tubing
|
|
NL6411125A
(de)
*
|
1963-09-25 |
1965-03-26 |
|
|
|
US3305021A
(en)
|
1964-06-11 |
1967-02-21 |
Schlumberger Technology Corp |
Pressure-responsive anchor for well packing apparatus
|
|
US3353599A
(en)
|
1964-08-04 |
1967-11-21 |
Gulf Oil Corp |
Method and apparatus for stabilizing formations
|
|
US3321018A
(en)
|
1964-10-07 |
1967-05-23 |
Schlumberger Technology Corp |
Well tool retrieving apparatus
|
|
DE1216822B
(de)
|
1965-03-27 |
1966-05-18 |
Beteiligungs & Patentverw Gmbh |
Streckenvortriebsmaschine
|
|
US3380528A
(en)
|
1965-09-24 |
1968-04-30 |
Tri State Oil Tools Inc |
Method and apparatus of removing well pipe from a well bore
|
|
US3419079A
(en)
|
1965-10-23 |
1968-12-31 |
Schlumberger Technology Corp |
Well tool with expansible anchor
|
|
US3392609A
(en)
|
1966-06-24 |
1968-07-16 |
Abegg & Reinhold Co |
Well pipe spinning unit
|
|
US3477527A
(en)
|
1967-06-05 |
1969-11-11 |
Global Marine Inc |
Kelly and drill pipe spinner-stabber
|
|
US3635105A
(en)
|
1967-10-17 |
1972-01-18 |
Byron Jackson Inc |
Power tong head and assembly
|
|
US3518903A
(en)
|
1967-12-26 |
1970-07-07 |
Byron Jackson Inc |
Combined power tong and backup tong assembly
|
|
GB1245811A
(en)
|
1968-05-08 |
1971-09-08 |
British Hovercraft Corp Ltd |
Improvements in or relating to cushion barriers for air or other gas cushion vehicles
|
|
US3489220A
(en)
*
|
1968-08-02 |
1970-01-13 |
J C Kinley |
Method and apparatus for repairing pipe in wells
|
|
US3548936A
(en)
|
1968-11-15 |
1970-12-22 |
Dresser Ind |
Well tools and gripping members therefor
|
|
US3552507A
(en)
*
|
1968-11-25 |
1971-01-05 |
Cicero C Brown |
System for rotary drilling of wells using casing as the drill string
|
|
US3747675A
(en)
|
1968-11-25 |
1973-07-24 |
C Brown |
Rotary drive connection for casing drilling string
|
|
FR1604950A
(de)
|
1968-12-31 |
1971-05-15 |
|
|
|
US3575245A
(en)
|
1969-02-05 |
1971-04-20 |
Servco Co |
Apparatus for expanding holes
|
|
US3552508A
(en)
*
|
1969-03-03 |
1971-01-05 |
Cicero C Brown |
Apparatus for rotary drilling of wells using casing as the drill pipe
|
|
US3606664A
(en)
|
1969-04-04 |
1971-09-21 |
Exxon Production Research Co |
Leak-proof threaded connections
|
|
US3570598A
(en)
|
1969-05-05 |
1971-03-16 |
Glenn D Johnson |
Constant strain jar
|
|
US3550684A
(en)
|
1969-06-03 |
1970-12-29 |
Schlumberger Technology Corp |
Methods and apparatus for facilitating the descent of well tools through deviated well bores
|
|
US3566505A
(en)
|
1969-06-09 |
1971-03-02 |
Hydrotech Services |
Apparatus for aligning two sections of pipe
|
|
US3559739A
(en)
*
|
1969-06-20 |
1971-02-02 |
Chevron Res |
Method and apparatus for providing continuous foam circulation in wells
|
|
US3552509A
(en)
*
|
1969-09-11 |
1971-01-05 |
Cicero C Brown |
Apparatus for rotary drilling of wells using casing as drill pipe
|
|
US3603413A
(en)
|
1969-10-03 |
1971-09-07 |
Christensen Diamond Prod Co |
Retractable drill bits
|
|
US3552510A
(en)
*
|
1969-10-08 |
1971-01-05 |
Cicero C Brown |
Apparatus for rotary drilling of wells using casing as the drill pipe
|
|
US3624760A
(en)
|
1969-11-03 |
1971-11-30 |
Albert G Bodine |
Sonic apparatus for installing a pile jacket, casing member or the like in an earthen formation
|
|
US3602302A
(en)
|
1969-11-10 |
1971-08-31 |
Westinghouse Electric Corp |
Oil production system
|
|
BE757087A
(fr)
|
1969-12-03 |
1971-04-06 |
Gardner Denver Co |
Mecanisme de devissage de tiges de forage commande a distance
|
|
US3603411A
(en)
|
1970-01-19 |
1971-09-07 |
Christensen Diamond Prod Co |
Retractable drill bits
|
|
US3603412A
(en)
|
1970-02-02 |
1971-09-07 |
Baker Oil Tools Inc |
Method and apparatus for drilling in casing from the top of a borehole
|
|
US3638989A
(en)
|
1970-02-05 |
1972-02-01 |
Becker Drills Ltd |
Apparatus for recovering a drill stem
|
|
US3662842A
(en)
|
1970-04-14 |
1972-05-16 |
Automatic Drilling Mach |
Automatic coupling system
|
|
US3808916A
(en)
|
1970-09-24 |
1974-05-07 |
Robbins & Ass J |
Earth drilling machine
|
|
US3656564A
(en)
|
1970-12-03 |
1972-04-18 |
Cicero C Brown |
Apparatus for rotary drilling of wells using casing as the drill pipe
|
|
US3669190A
(en)
|
1970-12-21 |
1972-06-13 |
Otis Eng Corp |
Methods of completing a well
|
|
US3780883A
(en)
|
1971-03-18 |
1973-12-25 |
Brown Oil Tools |
Pipe handling system for use in well drilling
|
|
US3706347A
(en)
|
1971-03-18 |
1972-12-19 |
Cicero C Brown |
Pipe handling system for use in well drilling
|
|
US3697113A
(en)
|
1971-03-25 |
1972-10-10 |
Gardner Denver Co |
Drill rod retrieving tool
|
|
US3766991A
(en)
*
|
1971-04-02 |
1973-10-23 |
Brown Oil Tools |
Electric power swivel and system for use in rotary well drilling
|
|
US3785193A
(en)
*
|
1971-04-10 |
1974-01-15 |
Kinley J |
Liner expanding apparatus
|
|
US3838613A
(en)
|
1971-04-16 |
1974-10-01 |
Byron Jackson Inc |
Motion compensation system for power tong apparatus
|
|
US3746330A
(en)
|
1971-10-28 |
1973-07-17 |
W Taciuk |
Drill stem shock absorber
|
|
US3691825A
(en)
|
1971-12-03 |
1972-09-19 |
Norman D Dyer |
Rotary torque indicator for well drilling apparatus
|
|
US3776320A
(en)
|
1971-12-23 |
1973-12-04 |
C Brown |
Rotating drive assembly
|
|
FR2209038B1
(de)
|
1972-12-06 |
1977-07-22 |
Petroles Cie Francaise |
|
|
US3881375A
(en)
|
1972-12-12 |
1975-05-06 |
Borg Warner |
Pipe tong positioning system
|
|
US3840128A
(en)
|
1973-07-09 |
1974-10-08 |
N Swoboda |
Racking arm for pipe sections, drill collars, riser pipe, and the like used in well drilling operations
|
|
US3870114A
(en)
*
|
1973-07-23 |
1975-03-11 |
Stabilator Ab |
Drilling apparatus especially for ground drilling
|
|
US3857450A
(en)
|
1973-08-02 |
1974-12-31 |
W Guier |
Drilling apparatus
|
|
US3848684A
(en)
|
1973-08-02 |
1974-11-19 |
Tri State Oil Tools Inc |
Apparatus for rotary drilling
|
|
US3871618A
(en)
|
1973-11-09 |
1975-03-18 |
Eldon E Funk |
Portable well pipe puller
|
|
US3913687A
(en)
|
1974-03-04 |
1975-10-21 |
Ingersoll Rand Co |
Pipe handling system
|
|
US3915244A
(en)
|
1974-06-06 |
1975-10-28 |
Cicero C Brown |
Break out elevators for rotary drive assemblies
|
|
US3934660A
(en)
*
|
1974-07-02 |
1976-01-27 |
Nelson Daniel E |
Flexpower deep well drill
|
|
US4077525A
(en)
*
|
1974-11-14 |
1978-03-07 |
Lamb Industries, Inc. |
Derrick mounted apparatus for the manipulation of pipe
|
|
US3964552A
(en)
|
1975-01-23 |
1976-06-22 |
Brown Oil Tools, Inc. |
Drive connector with load compensator
|
|
US3961399A
(en)
|
1975-02-18 |
1976-06-08 |
Varco International, Inc. |
Power slip unit
|
|
US3945444A
(en)
*
|
1975-04-01 |
1976-03-23 |
The Anaconda Company |
Split bit casing drill
|
|
US3980143A
(en)
|
1975-09-30 |
1976-09-14 |
Driltech, Inc. |
Holding wrench for drill strings
|
|
US4054332A
(en)
|
1976-05-03 |
1977-10-18 |
Gardner-Denver Company |
Actuation means for roller guide bushing for drill rig
|
|
US4100968A
(en)
*
|
1976-08-30 |
1978-07-18 |
Charles George Delano |
Technique for running casing
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|
US4189185A
(en)
*
|
1976-09-27 |
1980-02-19 |
Tri-State Oil Tool Industries, Inc. |
Method for producing chambered blast holes
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|
US4257442A
(en)
*
|
1976-09-27 |
1981-03-24 |
Claycomb Jack R |
Choke for controlling the flow of drilling mud
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|
US4127927A
(en)
|
1976-09-30 |
1978-12-05 |
Hauk Ernest D |
Method of gaging and joining pipe
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|
US4186628A
(en)
*
|
1976-11-30 |
1980-02-05 |
General Electric Company |
Rotary drill bit and method for making same
|
|
US4202225A
(en)
|
1977-03-15 |
1980-05-13 |
Sheldon Loren B |
Power tongs control arrangement
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US4142739A
(en)
*
|
1977-04-18 |
1979-03-06 |
Compagnie Maritime d'Expertise, S.A. |
Pipe connector apparatus having gripping and sealing means
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US4133396A
(en)
*
|
1977-11-04 |
1979-01-09 |
Smith International, Inc. |
Drilling and casing landing apparatus and method
|
|
US4280380A
(en)
|
1978-06-02 |
1981-07-28 |
Rockwell International Corporation |
Tension control of fasteners
|
|
US4194383A
(en)
*
|
1978-06-22 |
1980-03-25 |
Gulf & Western Manufacturing Company |
Modular transducer assembly for rolling mill roll adjustment mechanism
|
|
US4274777A
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GB2340858A
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1998-08-24 |
2000-03-01 |
Weatherford Lamb |
Methods and apparatus for facilitating the connection of tubulars using a top drive
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GB2340857A
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1998-08-24 |
2000-03-01 |
Weatherford Lamb |
An apparatus for facilitating the connection of tubulars and alignment with a top drive
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GB2340859A
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1998-08-24 |
2000-03-01 |
Weatherford Lamb |
Method and apparatus for facilitating the connection of tubulars using a top drive
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1998-09-01 |
2001-03-20 |
Muriel Wayne Ables |
Straight line, pump through entry sub
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1998-11-30 |
2001-02-13 |
Weatherford Lamb, Inc. |
Down hole assembly and method for forming a down hole window and at least one keyway in communication with the down hole window for use in multilateral wells
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GB2347441B
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1998-12-24 |
2003-03-05 |
Weatherford Lamb |
Apparatus and method for facilitating the connection of tubulars using a top drive
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GB2345074A
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1998-12-24 |
2000-06-28 |
Weatherford Lamb |
Floating joint to facilitate the connection of tubulars using a top drive
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1999-02-09 |
2001-01-16 |
Albert Augustus Mullins |
Single valve for a casing filling and circulating apparatus
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2002-12-20 |
2005-02-15 |
Weatherford/Lamb, Inc. |
Apparatus and method for drilling with casing
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2002-12-30 |
2005-02-22 |
Weatherford/Lamb, Inc. |
Drilling with concentric strings of casing
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1999-03-05 |
2004-02-17 |
Varco I/P, Inc. |
Load compensator for a pipe running tool
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US6431626B1
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1999-04-09 |
2002-08-13 |
Frankis Casing Crew And Rental Tools, Inc. |
Tubular running tool
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1999-04-09 |
2001-10-30 |
Frank's Casing Crew And Rental Tools, Inc. |
Tubular running tool
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1999-08-16 |
2001-02-20 |
Smart Drilling And Completion, Inc. |
Smart shuttles to complete oil and gas wells
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1999-09-07 |
2002-02-05 |
Halliburton Energy Services, Inc. |
Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation
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1999-10-08 |
2001-11-06 |
Tesco Corporation |
Casing clamp
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1999-10-13 |
2002-01-01 |
Carlos A. Torres |
Mechanical torque amplifier
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1999-10-28 |
2005-11-22 |
Leonardo Ritorto |
Locking swivel device
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2000-02-25 |
2000-04-12 |
Wellserv Plc |
Apparatus and method
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1999-12-23 |
2000-02-16 |
Eboroil Sa |
Subsea well intervention vessel
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2000-02-18 |
2003-04-29 |
Anthony R. Boyd |
Torque swivel and method of using same
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2000-03-14 |
2002-07-02 |
Weatherford/Lamb, Inc. |
Wellbore circulation system
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GB0008988D0
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2000-04-13 |
2000-05-31 |
Bbl Downhole Tools Ltd |
Drill bit nozzle
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2000-04-17 |
2008-02-05 |
Weatherford/Lamb, Inc. |
Methods and apparatus for handling and drilling with tubulars or casing
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2000-06-02 |
2002-02-26 |
Oil & Gas Rental Services, Inc. |
Drilling rig, pipe and support apparatus
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2000-09-08 |
2003-06-03 |
Bruce M. Victor |
Well head lubricator assembly with polyurethane impact-absorbing spring
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2002-07-16 |
2004-01-22 |
Simonds Floyd Randolph |
Apparatus and method for completing an interval of a wellbore while drilling
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GB2357530B
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2000-11-04 |
2003-09-03 |
Weatherford Lamb |
Method and apparatus for gripping tubulars
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GB2377951B
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2001-07-25 |
2004-02-04 |
Schlumberger Holdings |
Method and system for drilling a wellbore having cable based telemetry
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2001-08-27 |
2007-10-17 |
瓦克I/P公司 |
钻探系统和在钻探系统中连接冲洗管组件的方法
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2001-10-26 |
2004-01-20 |
Canrig Drilling Technology, Ltd. |
Top drive well casing system and method
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2002-04-08 |
2007-06-26 |
Baker Hughes Incorporated |
Drilling and cementing casing system
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2003-05-15 |
2004-11-16 |
Mechlift As |
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2004-06-07 |
2007-03-13 |
Varco I/P, Inc. |
Top drive systems
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NO329611B1
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2004-07-20 |
2010-11-22 |
Weatherford Lamb |
Fôringsmater.
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