| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 07/27/2005 | CN2713129Y Cementing trailer of oil field |
| 07/27/2005 | CN2713128Y Packer with movable pile casing |
| 07/27/2005 | CN2713127Y Hydraulic totally-enclosing well plugger for minor repair well |
| 07/27/2005 | CN2713126Y 光杆密封器 Rod sealer |
| 07/27/2005 | CN2713124Y Power feed device of blowout preventer |
| 07/27/2005 | CN1644872A Air well single-way closing agent and its formulating method |
| 07/27/2005 | CN1644647A Method for formulating modified paraffin wax water blocking agent |
| 07/26/2005 | US6922637 Method for selection of cementing composition |
| 07/26/2005 | US6920934 Method and apparatus for expandable liner hanger with bypass |
| 07/26/2005 | US6920929 Reverse circulation cementing system and method |
| 07/26/2005 | US6920927 Method and apparatus for anchoring downhole tools in a wellbore |
| 07/26/2005 | US6920925 Wellhead isolation tool |
| 07/26/2005 | CA2434801C Adapters for double-locking casing mandrel and method of using same |
| 07/26/2005 | CA2262932C Subsea well |
| 07/26/2005 | CA2261803C Subsea module |
| 07/21/2005 | WO2005066456A1 Method of reducing water influx into gas wells |
| 07/21/2005 | WO2005065292A2 Externally activated seal system for wellhead |
| 07/21/2005 | US20050155775 Bi-directionally boosting and internal pressure trapping packing element system |
| 07/21/2005 | US20050155774 Well operations system |
| 07/21/2005 | CA2552576A1 Externally activated seal system for wellhead |
| 07/20/2005 | EP1555385A1 Method of consolidating an underground formation |
| 07/20/2005 | EP1554461A1 Cement flow control tool |
| 07/20/2005 | EP1554459A1 Well packer for a pipe string and a method of leading a line past the well packer |
| 07/20/2005 | CN2711383Y Well cementation rubber stopper used for casing hole-drilling |
| 07/20/2005 | CN2711382Y Isolated cement head |
| 07/20/2005 | CN2711381Y Expanding type packing element |
| 07/20/2005 | CN2711380Y Apparatus for anti-blowout during snubbing serving for full-sealing zero-pressure conversion oil-water well |
| 07/20/2005 | CN2711379Y Intensive connecting back-pressure valve |
| 07/20/2005 | CN2711378Y Hole casing sealing well head |
| 07/20/2005 | CN1211564C Single stage double sealing well cementation method |
| 07/19/2005 | US6918446 One-trip wellhead installation systems and methods |
| 07/19/2005 | US6918441 Cup tool for high pressure mandrel |
| 07/19/2005 | US6918440 Testing drill packer |
| 07/19/2005 | US6918439 Backpressure adaptor pin and methods of use |
| 07/14/2005 | WO2005062749A2 System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud |
| 07/14/2005 | WO2005030672A3 Cement compositions comprising strength-enhancing lost circulation materials and methods of cementing in subterranean formations |
| 07/14/2005 | WO2004111379A8 Removable seal carrier for blowout preventer bonnet assembly |
| 07/14/2005 | US20050151099 Pressure compensated shear seal solenoid valve |
| 07/14/2005 | US20050150661 Inflate control system for inflatable straddle stimulation tool |
| 07/14/2005 | US20050150659 Running a Completion Assembly Without Killing a Well |
| 07/14/2005 | US20050150658 Method and apparatus for enhancing oil and gas flow in a well |
| 07/13/2005 | EP1552105A2 Annular isolators for expandable tubulars in wellbores |
| 07/13/2005 | CN2709758Y Screw-thread joint structure of expansion pipe |
| 07/13/2005 | CN2709645Y Special well cementation rubber plug for casing well drilling |
| 07/13/2005 | CN2709644Y Hydraulic boost buffer expanding packer |
| 07/13/2005 | CN2709643Y Underbalance well packer |
| 07/13/2005 | CN2709642Y Back-pressure variable wellhead blow-out preventer |
| 07/13/2005 | CN1639441A Method and apparatus for replacing BOP with gate valve |
| 07/12/2005 | US6915858 Element latch system and method of use |
| 07/12/2005 | US6915852 Hanging liners by pipe expansion |
| 07/12/2005 | US6915846 Production tubing joint |
| 07/12/2005 | US6915845 Re-enterable gravel pack system with inflate packer |
| 07/12/2005 | CA2304664C An apparatus for facilitating the connection of tubulars using a top drive |
| 07/09/2005 | CA2451641A1 Method of placing blocking gel in gas producing formations in order to reduce water influx into the well bore |
| 07/07/2005 | WO2005061848A1 Setting method for coiled tubing run, through tubing bridge plug |
| 07/07/2005 | WO2005061847A1 Well-plugging method and system using clayey materials |
| 07/07/2005 | WO2005024175A8 Dual function cement additive |
| 07/07/2005 | US20050146137 Mechanical joints for subsea equipment |
| 07/07/2005 | US20050145391 Split locking ring for wellhead components |
| 07/07/2005 | US20050145389 Casing cutter |
| 07/06/2005 | EP1549823A2 Bottom plug for forming a mono diameter wellbore casing |
| 07/06/2005 | CN2707953Y Two-way dual purpose tubing plug valve |
| 07/06/2005 | CN2707952Y Retrievable ash squeezing bridge plug |
| 07/06/2005 | CN2707951Y Balanced water shut off pressure measurement packer |
| 07/06/2005 | CN2707950Y High pressure fracturing packer |
| 07/06/2005 | CN2707949Y Pressure difference type high pressure packer |
| 07/06/2005 | CN2707948Y Hydropneumatic packer |
| 07/06/2005 | CN2707947Y Rotary production well head assembly motivated by external hydraulic cylinder |
| 07/06/2005 | CN2707946Y Simple well top sealing device |
| 07/06/2005 | CN1635261A Open eccentric packing box |
| 07/05/2005 | US6913240 Electrohydraulic control unit |
| 07/05/2005 | US6913092 Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
| 07/05/2005 | US6913084 Method and apparatus for controlling well pressure while undergoing subsea wireline operations |
| 07/05/2005 | US6913081 Water control treatment requires fewer steps than the sum of each treatment procedure practiced separately. The control of water production simultaneously further reduces the amount of scale formed. water control chemicals and scale inhibitors of |
| 07/05/2005 | US6913077 Downhole fluid separation system |
| 07/05/2005 | CA2149261C Liner cementing system and method |
| 06/30/2005 | WO2005059304A1 Method of creating a zonal isolation in an underground wellbore |
| 06/30/2005 | WO2005059301A1 Zeolite-containing settable spotting fluids |
| 06/30/2005 | WO2005059297A2 Method of using a multipurpose unit with multipurpose tower and a surface blow out preventer |
| 06/30/2005 | WO2005058986A1 Polyamine salts as clay stabilizing agents |
| 06/30/2005 | US20050139360 Externally activated seal system for wellhead |
| 06/30/2005 | US20050139353 Earth loop installation with sonic drilling |
| 06/30/2005 | CA2546469A1 Polyamine salts as clay stabilizing agents |
| 06/29/2005 | CN1633541A Riser control device |
| 06/29/2005 | CN1632279A Double action air leakage prevention agent for oil-gas well cementing, method for preparation and use thereof |
| 06/29/2005 | CN1632278A Big tail pipe side drilling well cementing technology |
| 06/28/2005 | US6911078 Based on a Portland cement, silica and alumina; suitable for cementing wells subjected to high temperature and chemical attack by brines |
| 06/28/2005 | US6910537 Canister, sealing method and composition for sealing a borehole |
| 06/28/2005 | US6910532 Water pressure system with pressure tank installed within well casing of well |
| 06/28/2005 | US6910531 Rotating drilling stripper |
| 06/28/2005 | CA2254391C Oil well tubing string hanging device and lifting assembly |
| 06/23/2005 | US20050133266 Rotating drilling head drive |
| 06/23/2005 | US20050133229 Universal pressure protector for a polish rod |
| 06/23/2005 | US20050133218 Packer cups |
| 06/23/2005 | US20050133216 Electrically operated actuation tool for subsea completion system components |
| 06/22/2005 | EP1544406A2 Colloidal and colloidal-like systems in aqueous, clay-based fluids |
| 06/22/2005 | CN2705587Y Pressure limited overflow packer |
| 06/22/2005 | CN2705586Y Hot production wellhead oil injection seal box |
| 06/22/2005 | CN1630767A Method of sealing an annulus |
| 06/22/2005 | CN1207483C Well completion formate liquid for well drilling |