Matches 1 - 50 out of 146 1 2 3 >
Match Document Document Title
7377325 Centraliser  
There is disclosed an expandable centraliser for locating a body within a borehole, and a method of centralising tubing in a borehole. In an embodiment of the invention, an expandable centraliser...
7357178 In and relating to downhole tools  
An improved centralizer is provided for centralization of tubulars such as casings, liners, production tubing, and production screens, in oil/gas wells. Such a centralizer comprises a tubular body,...
7320363 Energized slip ring assembly  
A slip ring assembly including a slip ring and an electrical contact assembly. The slip ring defines a circumference and an electrical contact groove extending around the circumference of the slip...
7308955 Stabilizer arrangement  
A stabilizer comprises a body having first and second ends, each of which is formed with a respective connector means, the body having an outer wall upon which is formed a plurality of the...
7308935 Rotary pump stabilizer  
A stabilizer is provided for stabilizing a rotary or progressive cavity pump suspended from production tubing in well casing. The stabilizer is connected between the production tubing and the pump....
7306036 System for reducing adhesion and cohesion between non metallic bailers and side wall of wells  
A water well bailer. In one embodiment, the bailer includes a tubular housing composed of any polymer used as a plastic, such as, polyethylene, polypropylene, polystyrene, polyesters,...
7299886 Stabilized down hole drilling motor  
A down hole drilling motor includes a stator housing having an exterior surface, an upper end, a lower end, an upper vane mounting region at the upper end and lower vane mounting region at the...
7278479 Downhole cable protection device  
A device for an underground well, typically a petroleum well ( 1 ), wherein, in the uncased inflow portion ( 2, 4, 6 ) of the well, there is placed an inflow pipe, possibly in the form of a...
7188689 Variable gauge drilling apparatus and method of assembly therefor  
A variable gauge drilling apparatus and a method for assembling a variable gauge drilling apparatus for insertion in a subject borehole. The variable gauge drilling apparatus includes: an apparatus...
7188671 System, method, and apparatus for survey tool having roller knuckle joints for use in highly deviated horizontal wells  
A highly flexible, wireline survey tool has roller knuckle joints that enable the survey tool string to penetrate and survey horizontal wells having inclinations of about 80° and more from...
7182131 Dual diameter and rotating centralizer/sub and method  
A dual diameter centralizing sub for maintaining stand-off and/or centralizing a tubular member inside a larger diameter tubular member, for instance, in a wellbore. The centralizer is provided...
7159668 Centralizer  
A centralizer 10 for mounting on a tubular member such as a section of casing, together with one or more stops 42, 48 for retaining the centralizer thereon. The stops 42, 48 are provided with...
7156171 Dual diameter and rotating centralizer/sub  
A centralizer for maintaining stand-off and/or centralizing a tubular member inside a larger diameter tubular member, for instance, in a wellbore. The centralizer is provided with bow springs that...
7143825 Expandable wellbore stabiliser  
A stabiliser is disclosed for stabilising a radially expandable tubular element extending in a wellbore drilled into an earth formation. The stabiliser comprises a radially expandable tubular...
7140431 Centraliser for an expandable tubular element in a wellbore  
A centralizer is disclosed for stabilizing a radially expandable tubular element extending in a wellbore drilled into an earth formation. The centralizer has a tubular member selected from a...
7134502 Method and apparatus for preventing spillage or loss of drill fluids  
A well bore fluid recovery system and method for recovering a column of well bore fluid within a stand of casing before cutting the casing. The recovery system relates to a system for preventing...
7124825 Casing wear band and method of attachment  
A crimpable wear band ( 105 ) tool has been invented for installation on casing ( 6 ), used in well bore drilling. A wear band ( 105 ) is provided having a cylindrical body which when coaxially...
7096940 Centralizer system for insulated pipe  
A centralizer system is provided for use in a marine riser system with an insulated pipe, which may be a titanium stress joint. The centralizer system utilizes one or more centralizers mounted such...
7096939 Slotted expandable centraliser  
This invention relates to a slotted expandable centraliser. In preferred embodiments, the centraliser is adapted to be used in conjunction with slotted casing, and can expand with the casing when...
7082997 Pipe centralizer and method of attachment  
A crimpable centralizer has been invented for installation on pipe, such as would be useful in well bore drilling and casing operations. The present invention provides a centralizer having a...
7055631 Drill pipe protector  
A drill pipe protector having a tubular sleeve that is attached to a section of drill pipe and resides over the outer diameter of the drill pipe while moving within an associated well casing or...
7044232 Well apparatus connection assembly  
The invention discloses an apparatus and method for securing together longitudinal members for use in a well. A common application of the invention is for securing an electric submersible pumping...
6997254 Method of making a centering device and centering device formed by that method  
A spring centralizer device for supporting a tubular member spaced from the wall of a bore is made from a single piece of boron steel material. The spring centralizer device has first and second...
6962205 Subsea wellhead landing clamp and slip bowl assembly  
A clamp for supporting a subsea wellhead and attached casing string preparatory to installing same in a well, and slip bowl assembly for running a drill pipe cementing string inside the casing...
6920924 Wellbore apparatus  
A unitary pipe loop component for use with a sinker bar and a pair of pipes in a wellbore includes a return bend pipe fitting having a fluid flow passage configured to extend between the pipes in...
6907944 Apparatus and method for minimizing wear and wear related measurement error in a logging-while-drilling tool  
A tool is presented for making density measurements of a formation surrounding a wellbore, comprising a collar housing in a drill string. The housing has at least one first section with a first...
6871706 Casing centralizer  
A casing centralizer having a pair of longitudinally spaced collars adapted to be assembled about a conduit, and a plurality of outwardly bowed springs extending longitudinally between the collars....
6845816 ADI centralizer  
A centralizer for use in centralizing casing or other tubulars such as tubulars in an oil or gas well comprising an annular body with a bore extending through the body and one or more blades, the...
6830106 Multilateral well completion apparatus and methods of use  
A multilateral well completion. In a described embodiment, a multilateral well completion system includes a completion apparatus installed in a cased parent wellbore. The completion apparatus has...
6830102 Centraliser  
A centraliser primarily for use when casing an oil or gas well, the centraliser having low frictions coatings or sliders on the outer surface thereof.
6725939 Expandable centralizer for downhole tubulars  
Centralizers made of a non-metallic material in a variety of styles are placed on the exterior of tubing or casing prior to expansion. The compliant nature of such materials, when put into service...
6688409 Friction reducing tool and method for its use in a wellbore  
A friction reducing tool ( 1 ) having a generally tubular body ( 2 ) and three or more groups of rotatable castors ( 3 ) provided about the periphery of the body, wherein the castors of each group...
6679325 Minimum clearance bow-spring centralizer  
A centralizer apparatus for centralizing tubular casing in a borehole having two stop collars for securing to the casing in a spaced apart relationship and two moving collars, one slidably and...
6666267 Downhole tools  
A casing centralizer is provided. Such a casing centralizer includes a tubular body substantially comprised of a plastics material and having an innermost surface, an outermost surface, and opposed...
6655477 Friction-reducing drill pipe component  
The friction reducing drill pipe component in the form of a sub ( 10 ) is adapted to form part of a drill string. The sub ( 10 ) comprises a tubular mandrel ( 12 ) having first and second ends for...
6637511 Borehole casing centralizer  
A borehole casing centralizer segment ( 1 ) including a first collar portion ( 3 ), a second collar portion ( 5 ), and bows ( 7 ) extending between the first collar portion ( 3 ) and the second...
6622788 External casing anchor  
A plurality of steel rings are crimped or shrink fitted onto a joint of steel well casing to produce the casing anchor. The rings and joint are sufficiently interlocked so that, when the anchor is...
6595284 Wire guard device for wells  
A one-piece wire guard device formed of non-metallic material for use in wells includes an inner ring having a split therein defining an opening and having a portion of reduced thickness defining a...
6585052 Casing centralizer  
A tubing centralizer for borehole drilling disclosed. The centralizer includes a retaining collar and an outer sleeve. In a method for installing the centralizer onto a joint of tubing, the...
6585043 Friction reducing tool  
A centralizer having a first group of rollers ( 5 ) for reducing friction between the centralizer and an oil field tubular ( 7 ) and a second group of rollers ( 4 ) for reducing friction between...
6561280 Method of injecting tubing down pipelines  
A new method and apparatus have been developed which inserts and withdraws tubing from pipes without bending or kinking the tubing. Beneficially, the new method and apparatus may be employed to...
6543533 Well tubing rotator  
A mandrel rotator is provided is mounted in a housing for coupling to a well casing head. The mandrel rotator comprises of an annular gear having external gear teeth and an axial opening. The...
6484803 Dual diameter centralizer/sub and method  
A dual diameter centralizing sub for maintaining stand-off and/or centralizing a tubular member inside a larger diameter tubular member, for instance, in a wellbore. The centralizer is provided...
6484802 Downhole scraper assembly  
This invention relates to apparatus for scraping the inner surface of a wellbore. A scraper assembly ( 2 ) is provided comprising a scraper element ( 6 ) incorporating: a generally cylindrical...
6457519 Expandable centralizer  
A centralizer for laterally positioning an instrument in an opening larger in diameter than the diameter of an opening through which the centralizer can freely pass. The centralizer includes spring...
6453999 Centralizer  
A centralizer which comprises a pair of annular bands ( 2, 3 ) which are spaced apart by a plurality of hollow members ( 4 to 9 ) characterized in that the hollow members ( 4 to 9 ) are each...
6453998 Progressive lock integral joint centralizer  
The present invention relates to a centralizer for use downhole in a well. The centralizer body has one or more contact arms attached to a movable collar. The body is run into the well to a...
6443226 Apparatus for protecting sensors within a well environment  
An apparatus for protecting sensing devices disposed on an outer surface of a pipe is provided. The apparatus includes a housing and a plurality of bumpers. The housing is attached to the outer...
6439304 Stand-off device  
A stand-off device for tubulars comprising a sleeve adapted to fit around a tubular, the sleeve comprising an outer surface and a plurality of blades extending along the outer surface of the...
6378633 Drill pipe protector assembly  
A drill pipe protector assembly for providing hydraulic lift and improved sliding lubrication to a drill string. The protector defines a tubular sleeve that is attached to a section of drill pipe...
Matches 1 - 50 out of 146 1 2 3 >