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8944157 Hydro pneumatic lifting system and method  
The disclosed invention introduces an efficient lifting mechanism for reciprocating vertically a load system, the load consisting of the aggregate weights of a cargo payload in conjunction with...
8939219 System and method for monitoring and controlling snubbing slips  
A system and method for monitoring and controlling a snubbing unit having traveling slips and stationary slips are provided. Position sensors are associated with the slips for detecting opened and...
8770272 Managing tensile forces in a cable  
A well servicing system includes a frame adapted to mount to a pipe handling system that includes a hanger adapted to guide a load coupled to a cable towards a wellhead, where the load exerts at...
8733457 Method and apparatus for axially displacing coiled tubing while minimizing fatigue  
A system and method for axially displacing a portion of coiled tubing into and/or out of a wellbore so that the coiled tubing does not incur a fatigue cycle during such axial displacement, such...
8640767 Push / pull system and support structure for snubbing unit on a rig floor  
A support structure for use on a rig floor and for supporting a unit used to manipulate tubular components through a wellhead comprises a support plate adapted to securely mount the support...
8561685 Mobile hydraulic workover rig  
A hydraulic workover rig including a base structure, a derrick extending from the base structure, a hydraulic lift cylinder connected to the upper end of the derrick, a lower slip assembly...
8544537 Drilling rig with a top drive with integral traveling block and airlift thread compensator  
A drilling rig with top drive assembly consisting of a traveling block housing, sheaves, with axles connected to a pair of links supporting a top drive, and a compressible extendable airbag as a...
8397825 Hydraulic lubricating system and method of use thereof  
A hydraulic lubricator assembly includes a spool for enclosing a downhole tool, wherein the spool comprises an upper end and a lower end. The hydraulic lubricator assembly further includes a...
8365816 Method and apparatus for conducting earth borehole operations  
A method and apparatus for conducting earth borehole operations comprising a CT system comprising a first carrier with a reel of CT and a CT injector, a second carrier comprising a top drive rig...
8365834 Tubular handling apparatus  
In one embodiment, a tubular gripping assembly for use with a top drive to handle a tubular includes a tubular gripping tool having a mandrel and gripping elements operatively coupled to the...
8333238 Compact snubbing unit  
A snubbing apparatus for moving well tubing through a blowout preventer including a support frame, a standing tubular engaging assembly, a pair of linear actuators, and a traveling tubular...
8162045 Stand compensator  
Methods and apparatus for connecting a tubular to a tubular string are provided. In one embodiment, an apparatus suitable for engaging, compensating, and connecting a tubular includes one or more...
7874371 Subsurface lubricator and method of use  
A subsurface lubricator facilitates well completion, re-completion and workover while increasing safety and reducing expense. The subsurface lubricator includes a bi-directional packoff tool on...
7766080 Snubbing jack  
A snubbing jack includes a first telescopic member and a second telescopic member. A stationary plate and a movable plate are affixed to the telescopic members. The movable plate moves away from...
7584798 Subsurface lubricator and method of use  
A subsurface lubricator facilitates well completion, re-completion and workover while increasing safety and reducing expense. The subsurface lubricator includes a bi-directional packoff tool on...
7578352 Controlled shared load casing jack system and method of using  
A method and apparatus for removing tubulars from a wellbore is disclosed. A lifting member grips the tubular and applies a lifting force. The lifting force is then transferred to a first surface....
7475722 Method and apparatus for restraining tubular members during well servicing  
A method for restraining tubular members during well servicing. A first step involves monitoring a velocity of tubular members as they are withdrawn from a well. A second step involves activating...
7469749 Mobile snubbing system  
A mobile snubbing system and method of operation transports a snubbing unit to a wellhead on a mobile platform. The snubbing unit is supported by a frame pivotable about a wellhead end of the...
7467676 Method and device for preventing pipeskidding  
A method and device for preventing a pipe string (5) clampingly arranged in a slips (2) from slipping out of the slips (2) in the event of the pipe string (5) slipping in the slips (2), wherein a...
7438126 Apparatus for controlling a tool having a mandrel that must be stroked into or out of a well  
An apparatus for controlling vertical movement of a tubular within a wellhead includes an anchor spool connected atop the wellhead, and a detachable superstructure supporting the tubular. The...
7413008 Tool for fluid filling and circulation during oilfield well tubing  
A tool for use in wells to maintain a tubed pipe filled with drilling fluid supplied by a well and to circulate the fluid through a well-pipe space, the tool facilitating sliding of tubes and...
7284617 Casing running head  
Methods and apparatus for drilling with a top drive system. In one aspect, the apparatus provides a tubular gripping member for use with a top drive to handle a tubular comprising a housing...
7255162 Methods and apparatus for use in subterranean cementing operations  
The present invention relates to subterranean cementing operations, and more particularly to an apparatus useful in loading cementing plugs and darts into tubulars, and methods of using such...
7216716 Control line manipulating arm and method of using same  
A control line guide and manipulating arm can protect and guide one or more control lines which are desired to be attached and lowered into a wellbore with a tubular string. The control lines may...
7140442 Tubing injector  
A tubing injector for injecting tubing (4) into a pipeline or bore or the like comprises: an annular piston for moving the tubing (4); a collet for gripping the tubing on movement of the piston in...
7117938 Drill pipe connecting and disconnecting apparatus  
Drilling rig apparatus for connecting and disconnecting well pipe at a drilling rig. A remotely controlled power wrench assembly is mounted on a remotely controlled lifting mechanism attached to a...
7117948 Convertible jack  
A snubbing unit for running and retrieving a string of tubing into a well under pressure selectively operates in a stand alone mode and a rig assist mode. The unit has a lower frame for mounting...
7077209 Mast for handling a coiled tubing injector  
A mast for lifting and suspending over a wellhead a coiled tubing injector and blow out preventer is pivotally mounted on a rear portion of a truck. The mast has two side-by-side telescoping legs...
6915868 Elevator apparatus and method for running well bore tubing  
An elevator apparatus for manipulating well bore tubing includes a circular body having a top and a central cavity around a body axis. The cavity has a diameter allowing the collar portion of the...
6860343 Drill rod holder  
Drill rod holder (10) for clamping a pair of jaws against a drill rod (40), by a piston-cylinder arrangement (22). A first of the jaws is fixed and a second jaw (36) is movable by the...
6854515 Wellhead hydraulic drive unit  
The present invention provides a wellhead hydraulic drive unit to operate various styles of downhole pumps, which is installed as an integral part of a wellhead thereby eliminating the need for a...
6827147 Reciprocating lubricator  
A reciprocating lubricator includes a lubricator base, a lubricator tube connected at the top to a lubricator head and inserted through a packing in the lubricator base to provide a sealable...
6814140 Apparatus and method for inserting or removing a string of tubulars from a subsea borehole  
A method and apparatus for inserting or removing a string of tubulars from a subsea borehole. The apparatus includes a first, lower, gripping mechanism locatable subsea in the vicinity of the...
6814148 Rotating jack plate assembly  
The present disclosure provides an apparatus and method for positioning a section of a well string. The apparatus includes a base plate and a turntable supported by the base plate. The turntable...
6595297 Method and apparatus for inserting a tubing hanger into a live well  
Apparatus for inserting a tubing hanger into a tubing head spool on a live well includes a landing spool and a landing joint that reciprocates through a top end of the landing spool. The landing...
6470965 Device for introducing a high pressure fluid into well head components  
A device for introducing high-pressure fluid through a well having a vertical passage with at least one valve and into a well having a well tubing into said vertical passage, has a lower part...
6412560 Tubular injector with snubbing jack and oscillator  
A tubular injector with snubbing jack and oscillator, which eliminates the need for overhead tubular and oscillator support structure and utilizes resonant vibration to remove tubulars (2) and...
6386282 Safety switching system for clamping devices for pipes  
The invention relates to a safety switching system for a clamping device, provided with clamping wedges and operable by a flowing medium for holding and/or lowering or raising a pipe string, with...
6347665 Snubbing unit tong apparatus  
A power tong set, with lead and back-up tongs, is mounted on the slip bowl of the traveling jack head of a snubbing unit and rotates with the slip bowl. Service lines (or umbelicals) for the tong...
6234253 Method and apparatus for well workover or servicing  
The present invention relates to a method and apparatus for the servicing or workover of a hydrocarbon well. The apparatus includes a pair of hydraulic cylinders pivotally mounted to a pair of...
6145596 Method and apparatus for dual string well tree isolation  
A dual string well tree isolation apparatus includes two assemblies each having a high pressure valve and a high pressure tubing which are respectively inserted into the vertical passage of a dual...
6032929 Arrangement in connection with a yoke in a hoisting system for a derrick  
PCT No. PCT/NO96/00290 Sec. 371 Date Jun. 22, 1998 Sec. 102(e) Date Jun. 22, 1998 PCT Filed Dec. 17, 1996 PCT Pub. No. WO97/23705 PCT Pub. Date Jul. 3, 1997A hydraulically-operated hoist is...
5992516 Well string injector  
A well string injector has a frame, with a guide at one end for guiding well string along the frame and a support at the other end for directing the well string towards a target. At least one of a...
5988274 Method of and apparatus for inserting pipes and tools into wells  
A snubbing configuration for inserting a pipe and/or a tool assembly on a pipe into a live well head employs a telescopic cylinder, e.g. a telescopic snubbing jack, between an upper BOP, e.g. an...
5909768 Apparatus and method for improved tubular grip assurance  
An apparatus for optionally gripping and releasing a tube, said apparatus having an elevator with a set of slips for optionally gripping and releasing a tube and a spider with a set of slips for...
5285852 Wellhead isolation tool and method of use thereof  
Apparatus for isolating the wellhead equipment from the high pressure fluids pumped down to the producing formation during the well servicing procedures of fracturing and acidizing oil and gas...
5060723 Wellhead isolation tool nipple  
A wellhead servicing tool is disclosed which comprises an axially shiftable cup which, in one position, virtually entirely surrounds the seal of the tool to facilitate its insertion into the...
5025857 Wellhead tubing and casing packer and installation and removal tool  
In the area of oilfield wellhead equipment, and specifically the wellhead valve known as the master valve on the wellhead array, there is often the necessity to remove this valve for repairs or...
5020590 Back pressure plug tool  
In the area of oilfield wellhead equipment and well servicing, specifically the operations associated with the prevention of fluids and gases from escaping from the well when valves and associated...
4875523 Pipeline servicing tool  
The invention relates to a compact valve removal tool with a fixed crosshead (18) to be mounted on a pipeline end, such as a wellhead spool outlet (3), and a moving crosshead (19) which is axially...

Matches 1 - 50 out of 78 1 2 >