Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 3 - Rotary drilling
Patents for E21B 3 - Rotary drilling (4,061)
06/2004
06/16/2004EP1427663A2 Load compensator for a pipe running tool
06/10/2004US20040107991 Bop operating system with quick dump valve
06/09/2004EP1426550A1 Methods and apparatus for applying torque and rotation to coupling members
05/2004
05/26/2004EP1421252A2 Washpipe assembly
05/25/2004US6739397 Continuous circulation drilling method
05/11/2004US6732822 Method and apparatus for handling tubular goods
05/11/2004US6732814 Rock drilling machine
05/11/2004US6732813 Method and device of controlling a rock drilling machine
05/04/2004US6729413 Power tool with battery pack ejector
04/2004
04/28/2004CN2613582Y Side anchorage drill machine
04/27/2004US6725949 Washpipe assembly
04/15/2004US20040072064 Power tool with battery pack ejector
04/15/2004US20040069532 Top drive system
04/15/2004US20040069497 Actuator control system for hydraulic devices
04/14/2004CN2611568Y 便携式工程钻机 Portable Drilling Rig
03/2004
03/31/2004CN2608667Y Mountainous region drilling machine
03/16/2004US6705407 Rock drilling and mounting frame
03/11/2004US20040046322 Face seal assembly
03/09/2004CA2301963C Method and apparatus for handling tubular goods
03/03/2004CN2605408Y Emulsion speed-regulating hydraulic drill
02/2004
02/24/2004US6695071 Drill head assembly
02/17/2004US6691801 Load compensator for a pipe running tool
02/05/2004WO2004011812A2 Actuator control system for hydraulic devices
02/05/2004WO2004011764A1 Device for simultaneously casing a hole while drilling
02/04/2004CN1472397A Constructing technology for pile core
01/2004
01/13/2004US6675915 Drilling machine having a rotary head guide
12/2003
12/30/2003US6668684 Tong for wellbore operations
12/30/2003CA2160714C Drive head assembly for drilling machine
12/25/2003US20030234101 Drilling method
12/24/2003WO2003018951A3 Washpipe assembly
12/23/2003CA2203736C Guided drilling system with shock absorber
12/17/2003CN2592839Y Rock drilling machine
12/10/2003CN2591208Y Hydraulic unit head for water well drilling machine
12/10/2003CN2591207Y Small size underground cross hole drilling machine
12/04/2003US20030221519 Methods and apparatus for connecting tubulars while drilling
12/03/2003CN2589657Y Novel gear type anchor bolt drilling machine
12/02/2003US6655405 BOP operating system with quick dump valve
11/2003
11/05/2003CN2584795Y Underground pipe-jacking drilling machine
10/2003
10/28/2003US6637526 Offset elevator for a pipe running tool and a method of using a pipe running tool
10/08/2003CN2578507Y Well drill machines
09/2003
09/18/2003US20030173073 Top drive casing system
09/12/2003WO2003074834A1 Drill equipped with vibrating hammer with eccentric masses for tool support
09/09/2003US6615931 Continuous feed drilling system
09/04/2003US20030164276 Top drive casing system
09/03/2003EP0800609B1 A drilling method and bit assembly to realize the method
09/03/2003EP0760899B1 Top entry apparatus and method for a drilling assembly
08/2003
08/21/2003US20030155159 Method and apparatus for handling tubular goods
08/14/2003US20030151298 Equipment for drilling vertical boreholes
08/14/2003US20030150647 Rotary support table
08/13/2003CN2565960Y Three-axis screw drilling reamer
08/06/2003CN2564728Y Hydraulic anchor rod drilling machine
08/06/2003CN2564727Y Full-automatic hydraulic deep-water well drilling machine
07/2003
07/24/2003WO2003060280A2 Rotary support table
07/23/2003CN2561909Y Hydraulic anchor rod drill
07/15/2003US6591916 Drilling method
07/10/2003US20030127250 Continuous feed drilling system
07/09/2003CN1428495A Desert screw drilling machine vehicle
07/03/2003WO2003054338A2 Offset elevator for a pipe running tool and a method of using a pipe running tool
07/02/2003CN1427916A Rock drilling machine
05/2003
05/30/2003WO2003025444A3 Load compensator for a pipe running tool
05/22/2003US20030094308 Boring device and boring method
05/14/2003EP1310600A1 Drilling apparatus and method
05/14/2003CN1417448A Hole drilling equipment and method
05/07/2003CN2549152Y Multifunctional horizontal driller
05/01/2003US20030082929 Data transfer system
04/2003
04/30/2003CN2547859Y Explosion-proof wet drill using hydraulic source as power source
04/24/2003US20030075346 Rock drilling machine
04/23/2003EP1303680A1 Rock drilling machine
04/16/2003CN2545349Y Drilling apparatus
04/10/2003US20030066654 Pipe running tool
04/10/2003DE10155105C1 Earth drill with pipe line installer has frame supporting hollow drill shaft with flushing pipes
04/02/2003CN2542816Y Axial integral opening rotary drilling digger
04/02/2003CN1406699A Electric tool with battery catapult
03/2003
03/27/2003WO2003025444A2 Load compensator for a pipe running tool
03/27/2003US20030056988 Drilling machine having a rotary head guide
03/25/2003US6536541 Boring unit for pile foundations
03/25/2003US6536520 Top drive casing system
03/20/2003US20030051883 Washpipe assembly
03/19/2003CN2540492Y Revers circulation drilling machine
03/19/2003CN2540491Y Rotary drilling machine for mould concrete pile
03/06/2003WO2003018951A2 Washpipe assembly
03/05/2003EP1289032A1 Power tool, battery pack and attachment/ejection mechanism therefor
03/05/2003CN2538972Y Gas control freeze-proof device for drilling machine
03/05/2003CN2538940Y Wave detector well drilling machine
02/2003
02/27/2003US20030039880 Power tool with battery pack ejector
02/26/2003CN1399057A Gyrator
02/12/2003CN2535540Y Anchor-red recovering driller
02/12/2003CN2535539Y Automatic locking-aligning-dust-controlling mechanism for driller
02/11/2003CA2173416C Inserting device for coiled tubing
01/2003
01/16/2003US20030010514 Single push button reverse valve system for a pneumatic tool
01/15/2003EP1274919A1 Top drive for casing connection
01/02/2003US20030000742 Offset elevator for a pipe running tool and a method of using a pipe running tool
01/01/2003CN2528919Y Non-excavated underground lateral drilling machine
12/2002
12/18/2002EP1266119A1 Method and apparatus for handling tubular goods
12/11/2002EP1264069A2 Wellbore circulation system, kelly bushing, kelly and tong
12/04/2002CN1382895A Self-fastening sealed drill sleeve and drill rod driven by drilling machine of anchor rod
11/2002
11/27/2002CN2522598Y Desert auger drill rig unit head
11/27/2002CN2522597Y Desert auger drilling rig
11/20/2002CN1380934A Method and device for moving tube in borehole in ground
10/2002
10/31/2002US20020157838 Continuous circulation drilling method
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