Patents for E21B 3 - Rotary drilling (4,061)
04/2005
04/06/2005CN2690552Y Exciting well drilling tool in complicated ground area
03/2005
03/31/2005WO2005028808A1 Automatic false rotary
03/31/2005US20050067168 Method and apparatus for controlling the ascent and descent of pipe in a well bore
03/30/2005EP1518999A2 Method and apparatus for driving a boring element into the ground
03/30/2005CN1601046A Fast well rig with no circular liquid
03/30/2005CN1601045A Drilling apparatus and method for introducing a drilling element into the soil
03/24/2005US20050061550 Drilling apparatus and method for introducing a drilling element into the soil
03/23/2005CN2687301Y Integral tower-building type long-spiral drilling machine
03/17/2005WO2004079147A9 Method and apparatus for drilling with casing
03/17/2005US20050056420 Apparatus and method for visually detecting wear to insert bowls, bushings, and spiders
03/16/2005CN2685625Y Large power closed system
03/16/2005CN1193160C Drilling apparatus for drilling well in stratum
03/10/2005WO2005021927A1 A drilling device with a telescopic arm
03/10/2005WO2004097160A3 System and method using a continuously variable transmission to control one or more system components
03/10/2005US20050051364 Feed table pivot pin constraining device
03/09/2005EP1512831A1 Feed table pivot pin constraining device
03/09/2005CN2683848Y Rotary disc reversing prevention braking mechanism for well drilling
03/09/2005CN2683819Y Pit drilling apparatus
03/09/2005CN2683818Y Super-light type drilling machine for mining
03/09/2005CN2683817Y Hydraulic bending moment type rock electric drill
03/02/2005CN2682185Y Sliding type drill rod clamp for top driving drilling device
03/02/2005CN1587631A Multiple shaft drilling machine and its construction method
03/02/2005CN1587630A Rope salvaging type filing discharge stepless drilling and forming hole method and machine tool
02/2005
02/23/2005CN2680843Y Mechanical casing drive head for casing drilling
02/23/2005CN1584278A Multi-drilling bit high-speed rotary punching apparatus
02/16/2005CN2679337Y Crawler monotube jetitng hydraulic jumbolter
02/09/2005CN2677579Y Low-noise wall bit
02/09/2005CN2677578Y Square bushing device
02/02/2005CN2675840Y Vertical shaft swinging type self-unloading fastener engineering drilling machine
01/2005
01/27/2005WO2004079155A3 Methods and apparatus for handling and drilling with tubulars or casing
01/26/2005CN2674063Y Gantry type engineering drilling machine
01/26/2005CN2674062Y Rotating power mechanism for rotary drill cart
01/26/2005CN2674061Y Loose-proof device for power head central tube
01/26/2005CN2674060Y Pipe-line arrangement for out-hanging type power head
01/26/2005CN2674059Y Large torque and multi-functional power head
01/19/2005CN2672372Y Rotary device
01/12/2005CN2670576Y Single cylinder hydraulic horizontal drilling machine
01/12/2005CN2670575Y Double-cylinder hydraulic horizontal drilling machines
01/12/2005CN2670574Y Rotary well drilling machines
01/12/2005CN2670573Y Variable-speed transfer gearbox device for petroleum exploration
01/12/2005CN1563661A Hoisting and draughting mechanism in ram machine for screw thread pile
01/12/2005CN1563603A Technical method for pouring reinforced concrete pipe pile in large diameter on location and equipment
01/06/2005US20050000733 Systems and methods for performing mud pulse telemetry using a continuously variable transmission
01/06/2005US20050000691 Methods and apparatus for handling and drilling with tubulars or casing
01/05/2005CN2668930Y Drilling machine power driving system
01/05/2005CN1561427A Washpipe assembly
12/2004
12/30/2004US20040262044 Systems and methods for directionally drilling a borehole using a continuously variable transmission
12/30/2004US20040262043 Systems and methods for the drilling and completion of boreholes using a continuously variable transmission to control one or more system components
12/22/2004CN1556302A Low nose well drill
12/22/2004CN1556301A Radiation well horizontal radiation pipe full hydraulic construction equipment
12/21/2004US6832658 Top drive system
12/16/2004US20040251050 Method and apparatus for drilling with casing
12/14/2004CA2058784C Earth drilling apparatus
12/02/2004WO2004079147A3 Method and apparatus for drilling with casing
12/01/2004CN2660086Y High voltage electric driving gear of oil drill
12/01/2004CN2660085Y Mine rock electrodrill
11/2004
11/24/2004EP1222356B1 Method and device for moving a tube in a borehole in the ground
11/24/2004CN2658368Y Hand petroleum drilling machine
11/18/2004US20040226731 Drilling and/or hammering tool
11/17/2004CN2656597Y Fast connecting mechanism for guide rail
11/11/2004WO2004097160A2 System and method using a continuously variable transmission to control one or more system components
11/11/2004CA2727134A1 Systems and methods using a continuously variable transmission to control one or more system components
11/11/2004CA2726969A1 Systems and methods using a continuously variable transmission to control one or more system components
11/10/2004EP1475512A1 Pipe running tool
11/09/2004US6814167 Boring device and boring method
11/09/2004US6814166 Direct push drilling swivel and method for its use
10/2004
10/27/2004CN1540129A Earth auger of making concrete pile
10/20/2004CN2649763Y Hydraulic rotary table for oil drilling rig
10/13/2004EP1466067A2 Offset elevator for a pipe running tool and a method of using a pipe running tool
10/07/2004US20040197175 Power tool with battery pack ejector
10/06/2004EP1159508B1 Snubbing unit tong apparatus
10/06/2004CN2646214Y Pile extruder
10/05/2004CA2307386C Torque boost apparatus and method for top drive drilling systems
09/2004
09/28/2004US6796390 Method and device for moving a tube in a borehole in the ground
09/22/2004EP1458949A2 Rotary support table
09/16/2004WO2004079155A2 Methods and apparatus for handling and drilling with tubulars or casing
09/16/2004WO2004079147A2 Method and apparatus for drilling with casing
09/16/2004US20040177971 Washpipe assembly
09/15/2004CN2641264Y Hydraulic coal drill with non-oil medium motor
09/15/2004CN2641263Y Drilling rod with increased length
09/14/2004CA2306714C Apparatus and method for rapid replacement of upper blowout preventers
09/08/2004CN2639501Y 钻井机 Drilling Machine
09/08/2004CN1526911A Drilling and reaming machine
09/01/2004CN2637698Y Power driving devcie for petroleum drilling machine
09/01/2004CN2637697Y Petroleum drilling machine rotary table driving device
09/01/2004CN2637696Y Ice drilling machine
08/2004
08/26/2004WO2003018951A8 Washpipe assembly
08/25/2004CN2635889Y Inner sleeve plug-in type top driving well drilling device
08/24/2004US6779543 BOP operating system with quick dump valve
08/19/2004US20040159467 Continuous circulation drilling method
08/19/2004US20040159465 Drilling method
08/18/2004CN2634184Y Rotary drill bit clutch
08/12/2004US20040154835 Tong for wellbore operations
08/05/2004WO2003054338A3 Offset elevator for a pipe running tool and a method of using a pipe running tool
08/04/2004CN2630462Y Complex surface zone detector well portable drilling tool
07/2004
07/29/2004US20040144547 Methods and apparatus for applying torque and rotation to connections
07/28/2004CN2628706Y Tilt oscillating self-clamping back tongs for top driving drilling well apparatus
07/20/2004US6763901 Air delivery system for a direct push drilling swivel
07/08/2004WO2003060280A3 Rotary support table
07/07/2004CN2623863Y Coaxial adamant boring machine
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