Patents for E21B 41 - Equipment or details not covered by groups (7,984) |
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01/19/1988 | US4719972 Treatment of steam feedwater with CO2 to reduce oil well reservoir gravel and sand dissolution during steam injection |
01/12/1988 | US4718492 Coating with epoxy resin |
01/07/1988 | EP0251882A1 Device and method for positioning and connecting by remote control a curved connector |
12/29/1987 | US4715755 Securing device for securing in cavities |
12/29/1987 | US4715538 Swirl jet nozzle as a hydraulic work tool |
12/23/1987 | EP0250016A2 Well cementing tool |
12/22/1987 | US4714403 Down-hole devices for imparting rotary motion |
12/22/1987 | US4714112 Controlled addition of salt to steam to control ph |
12/15/1987 | US4712616 Method for scale reduction in off-shore platforms |
12/03/1987 | WO1987007232A1 Apparatus for carrying out operations under water |
11/25/1987 | EP0246722A1 Apparatus for anchoring downhole corrosion coupons |
11/24/1987 | US4708524 Remote guideline connector |
11/19/1987 | WO1987006906A1 Mono-atmospheric chamber |
11/10/1987 | US4705754 Biofouling side-stream apparatus (BSSA) for monitoring the microbial growth in oilfield water systems |
11/10/1987 | US4705107 Apparatus and methods for cleaning a well |
11/04/1987 | EP0244317A1 Device for drilling wells with lateral branches |
11/04/1987 | EP0243408A1 A carriage which is mountable to elongate members for passage therealong |
10/27/1987 | US4702320 For installing subsea devices |
10/20/1987 | CA1228328A1 Protecting metal substrates using sulphides of groups vb, v1b, v11b, and rare earths |
10/06/1987 | US4698168 Corrosion inhibitor for well acidizing treatments |
09/29/1987 | US4696353 Drilling mud cleaning system |
09/23/1987 | EP0238337A2 Thermomechanical electrical power supply apparatus for a downhole tool |
09/22/1987 | US4694908 Method and apparatus of injecting fluid into a well conduit by coil tubing |
09/22/1987 | US4694901 Apparatus for removal of wellbore particles |
09/09/1987 | EP0236026A2 Tether cable management apparatus and method for a remotely-operated underwater vehicle |
09/09/1987 | EP0235976A1 Electrical energy source apparatus |
09/08/1987 | US4692911 Methods and apparatus for reducing interfering effects in measurement while drilling operations |
09/01/1987 | CA1226144A1 Foundation level and construction of a subsea production platform and a method of using said tool |
08/25/1987 | US4689523 Optical cleaning system for removing matter from underwater surfaces |
08/25/1987 | US4688828 Tubing joint for corrosion protection |
08/25/1987 | US4688650 For use in the drilling of a well with a drill bit |
08/25/1987 | US4688638 Downhole corrosion coupon holder |
08/25/1987 | US4688637 Method for induced flow recovery of shallow crude oil deposits |
08/25/1987 | US4688635 Apparatus for setting a bottom tool |
08/25/1987 | US4688290 Apparatus for cleaning pipes |
08/19/1987 | EP0232891A2 Drilling tool for deep wells |
08/18/1987 | US4686927 Tether cable management apparatus and method for a remotely-operated underwater vehicle |
08/12/1987 | EP0231707A1 Method and device for positioning an element using ultrasonic transducers |
08/12/1987 | EP0231592A2 Locking device |
07/30/1987 | WO1987004420A1 Nitrogen injection |
07/28/1987 | US4683464 Safety monitor means and method |
07/28/1987 | US4682913 Hydraulic stab connector |
07/14/1987 | US4679626 Energy efficient process for viscous oil recovery |
06/23/1987 | US4675259 Especially interconnectible battery packages for down-hole tool in wells |
06/23/1987 | US4674573 Method and apparatus for placing cement plugs in wells |
06/23/1987 | US4674572 Corrosion and erosion-resistant wellhousing |
06/16/1987 | EP0225359A1 Device for accurately positioning two geometrical axes which belong correspondingly to two elements |
06/11/1987 | DE3543321A1 Deep-drilling plant |
06/09/1987 | US4671833 Polyfluoroolefin polymer sleeves as protective coat against sulfur melts |
06/09/1987 | US4671359 Apparatus and method for solids removal from wellbores |
06/03/1987 | EP0224353A1 Method and apparatus for treating sludge streams |
05/26/1987 | US4668128 Curing cement, hydrophilic powder; and aggregated residues from well drilling |
05/19/1987 | US4665981 Method and apparatus for inhibiting corrosion of well tubing |
05/07/1987 | WO1987002640A1 A carriage which is mountable to elongate members for passage therealong |
04/28/1987 | US4661017 Method and apparatus for aligning underwater components |
04/14/1987 | US4657116 Vibration-isolating apparatus |
04/14/1987 | US4657076 Chemical injection tube mounting structure for geothermal well |
04/14/1987 | CA1220416A1 Multi-drain drilling and petroleum production start- up device |
04/07/1987 | CA1220133A1 Safety device for submerged wellhead |
04/01/1987 | EP0215880A1 Hydraulic power supply for use during well drilling operations |
03/31/1987 | USRE32384 Marine tether anchoring device |
03/31/1987 | US4654150 Apparatus and method for removing combustibles from drill cuttings |
03/17/1987 | US4650253 Pick and the combination of a pick and holder |
03/17/1987 | US4649995 Well treating apparatus |
03/12/1987 | WO1987001312A1 In situ hazardous waste treating apparatus and method of using same |
03/10/1987 | US4648782 Underwater manipulator system |
02/26/1987 | WO1987001058A1 Method for clearing deposits from the inner surface of a pipeline and applying protective coating thereto |
02/25/1987 | EP0211725A1 Device for positioning a tool in a drain pipe of a drilled well |
02/24/1987 | US4645608 Method of treating oil contaminated cuttings |
02/17/1987 | US4643616 Device for positioning, activating and connecting modules of a sub-sea oil production station |
02/17/1987 | US4643259 Hydraulic drill string breakdown and bleed off unit |
02/12/1987 | DE3631424A1 Method of disposing of harmful substances with simultaneous energy generation |
02/03/1987 | US4640096 Load carrying connection and hydraulic fluid transmission device |
01/20/1987 | US4637469 Apparatus and method of well preparation for chemical treatment of produced fluids |
01/13/1987 | US4636995 Mud pressure control system |
01/13/1987 | US4635723 Continuous injection of corrosion-inhibiting liquids |
01/06/1987 | US4633958 Downhole fluid supercharger |
12/30/1986 | US4632601 System and method for disposal of noncondensable gases from geothermal wells |
12/30/1986 | US4632188 Subsea wellhead apparatus |
12/30/1986 | EP0206855A1 Method and device for detecting a fluid flow |
12/23/1986 | US4630691 Annulus bypass peripheral nozzle jet pump pressure differential drilling tool and method for well drilling |
12/23/1986 | US4630680 For use with a floating drilling vessel |
12/18/1986 | WO1986007468A1 Device for accurately positioning two geometrical axes which belong correspondingly to two elements |
12/17/1986 | EP0205250A1 Improvements in subsurface device actuators |
12/16/1986 | USRE32304 Adding anti corrosive material to oil well; gravity system |
12/09/1986 | CA1214930A1 Process for containment of liquids as solids or semisolids |
12/02/1986 | US4625805 Oil production installation for a subsea station of modular design |
12/02/1986 | US4625803 Method and apparatus for injecting well treating liquid into the bottom of a reservoir interval |
12/02/1986 | US4625799 Cleaning tool |
11/25/1986 | US4624329 Rotating cutter drill set |
11/25/1986 | US4624318 Method and means for storing a marine riser |
11/25/1986 | US4624136 Down hole power conversion means for fully utilizing batteries |
11/04/1986 | USRE32274 Marine tether anchoring device |
11/04/1986 | US4620819 Submarine working equipment |
10/28/1986 | US4619321 Method and apparatus for treating down hole equipment from corrosion in production well |
10/21/1986 | US4618285 Buoyant ring gasket installation tool |
10/07/1986 | US4615399 Valved jet device for well drills |
10/07/1986 | US4615387 For inhibiting corrosion in wells |
09/25/1986 | WO1986005543A1 Hydraulic power supply for use during well drilling operations |
09/16/1986 | US4611952 Method of fabricating the lines of a taut-line platform and of prepositioning them prior to final fixing |