Patents
Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800)
02/1987
02/10/1987US4641776 Segmented concentric centralizer
02/10/1987US4641717 Connector housing
02/10/1987US4641410 Method and apparatus for making a joint for steel tubes
02/10/1987CA1217761A Method employed in deep hole drilling and a drill shaft system
02/10/1987CA1217759A Drilling equipment
02/10/1987CA1217733A Device and method to make at least one electrical connection between two points at either end of a pipe
02/10/1987CA1217610A Fluid jet apparatus and method for cleaning tubular components
02/04/1987EP0210771A1 Spiralling tapered slip-on drill string stabilizer
02/04/1987EP0210758A2 Apparatus for cutting a drill collar
02/04/1987CN86201517U 钻杆夹持器 Drill holder
02/03/1987US4640815 Resistant interior cladding; powder metallurgy
02/03/1987US4640814 Filling cavity with metal particles, then concureent heating and forging
02/03/1987US4640647 Offshore well apparatus and method
02/03/1987US4640353 Electrode well and method of completion
02/03/1987US4640349 Flexible sucker rod unit
02/03/1987CA1217472A1 Method and apparatus for controlling azimuthal drift of a drill bit
01/1987
01/27/1987USRE32336 Method and apparatus for conducting logging or perforating operations in a borehole
01/27/1987US4638874 Drill adaptor
01/27/1987US4638873 Direction and angle maintenance tool and method for adjusting and maintaining the angle of deviation of a directionally drilled borehole
01/27/1987US4638862 Means and method for producing hydrocarbons from an earth formation during the RF retorting of a hydrocarbon stratum
01/27/1987US4638860 Apparatus for blocking communication between well bore intervals
01/27/1987CA1217231A1 Device for transmitting to the surface the signal from a transmitter located at a great depth
01/24/1987CN85101442A Joint for steel tubes, its manufacturing process and a set of tool to carryout the process
01/21/1987EP0209338A2 Apparatus for hydraulically releasing a tool string from a gravel screen
01/21/1987EP0209318A2 Control of drilling courses in the drilling of bore holes
01/21/1987EP0209217A2 Apparatus and method for forming an enlarged underground arcuate bore and installing a conduit therein
01/21/1987CN86105695A Apparatus for cutting a drill collar
01/20/1987US4637459 Anti rotational device for down hole hydraulic pumping unit
01/20/1987CA1216871A1 Coupling for tubing or casing and method of assembly
01/15/1987DE3524865A1 Coupling sleeve for pipes
01/14/1987CN86104802A Compliant tower
01/13/1987US4636727 Method and apparatus for detecting the location of defects in tubular sections moving past a well head
01/13/1987US4636114 Buoyancy-supported struts for ocean platforms
01/13/1987US4635968 Method and apparatus for protecting consecutive multiple variable diameter couplings
01/13/1987US4635967 Internal seal for insulated steam injection casing assembly
01/13/1987US4635736 Drill steering apparatus
01/13/1987CA1216529A1 Tubular member thread protector
01/07/1987CN85205530U Swivel coupling of square drilling pipes with radial clutch
01/06/1987US4634314 Composite marine riser system
01/06/1987US4633801 Stress reduction connection apparatus for cylindrical tethers
01/06/1987CA1216107A1 Rods resistant to hydrosulfuric acid
12/1986
12/30/1986US4632603 Marine riser base system
12/30/1986US4632468 Guide for well pump sucker rod
12/30/1986US4632406 Apparatus in which an annular ring is carried within a groove about one member for slidably engaging the cylindrical surface of another member
12/30/1986US4632195 Roof drill system
12/30/1986US4632183 Insertion drive system for tree savers
12/30/1986EP0207068A2 Method for manufacturing non-magnetic drilling rods
12/30/1986EP0206943A2 Fiber optic connector assembly
12/30/1986EP0206917A1 Apparatus and method for the temporary protection of a workover or logging tool fastened to the end of a string
12/30/1986EP0206909A1 Wire line cutting nipple for drilling, production, logging or performing operations in wells
12/30/1986EP0205421A1 Oilwell tubing connector
12/23/1986US4630849 Oil well pipe joint
12/23/1986US4630809 Vibration isolator and shock absorber device
12/23/1986US4630692 Applying to body a mixture of wear resistant metallic powder and binder, voltalizing binder, and pressurizing
12/23/1986US4630690 Spiralling tapered slip-on drill string stabilizer
12/23/1986CA1215551A1 Assembly of conductor guides for offshore drilling platform
12/17/1986EP0201398A1 Composition for oriented drilling
12/16/1986US4629991 Methods and apparatus for detecting tubular defects having a plurality of expandable arcuate segments
12/16/1986US4629985 Method and apparatus for measuring defects in tubular members
12/16/1986US4629225 Pipe joint for corrosion resistant alloys
12/16/1986US4629224 Tubular connection
12/16/1986US4629223 Pipe connector
12/16/1986US4629222 Pipe connector
12/16/1986US4629221 Pipe connectors
12/16/1986US4629218 For providing fluid communication
12/10/1986EP0204128A2 Plug-in connection for earth-drilling pipes
12/10/1986EP0203919A1 An improved threaded pipe connection
12/09/1986US4627502 Liquid-filled collar for tool string
12/09/1986US4627490 Well bore barrier penetrator arrangement and method for multiple conductor pump power cable
12/09/1986CA1215115A1 Device for automatically compensating the magnetism of drill rods
12/03/1986EP0203074A1 Oilwell tubing connection.
12/03/1986CN86100022A Details for percussion drill
12/03/1986CN85104317A Coupling for oil well sucker rods and the like
12/02/1986US4625815 Drilling equipment, especially for use in underground mining
12/02/1986US4625814 Percussive drill rod system
12/02/1986US4625381 Floating wear bushing retriever apparatus
12/02/1986CA1214768A1 Hydraulic piston-effect method and apparatus for forming a bore hole
11/1986
11/26/1986EP0203003A1 Remotely-controlled assembling device for two items
11/25/1986US4624488 Tubular connection
11/25/1986US4624485 Insulating tubular conduit apparatus
11/25/1986US4624484 Shrink-fit connector for electrical well subsurface heating processes
11/25/1986US4624483 Quick connect coupler
11/25/1986US4624318 Method and means for storing a marine riser
11/25/1986US4624313 Well tool dislodgement apparatus
11/25/1986US4624309 Apparatus for monitoring a parameter in a well
11/25/1986US4624308 Sour gas cable head
11/25/1986CA1214481A1 High pressure proof steel tube joint with low susceptibility to seizing
11/20/1986WO1986006784A1 Well tool for use with down-hole drilling apparatus
11/20/1986EP0202151A1 Apparatus for a drill pipe or the like, comprising a side entry SUB for a cable
11/20/1986EP0202029A1 Buoy having minimal motion characteristics
11/20/1986EP0201724A2 Replaceable conveying spiral for a drill bit
11/20/1986EP0201723A2 Drilling tool with a replaceable conveying spiral
11/18/1986US4623173 Screw joint coupling for oil pipes
11/12/1986CN86103301A Well tool for use with down-hole drilling apparatus
11/12/1986CA1213969A Method and device for making geophysical measurements within a wellbore
11/12/1986CA1213838A Filament wound interlaminate tubular attachment and method of manufacture
11/11/1986US4621838 Insert for insulated steam injection tubing
11/11/1986US4621690 Sucker rod coupling
11/11/1986US4621689 Cable suspended submergible pumping system with safety valve
11/11/1986US4621655 Marine riser fill-up valve