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4434853 |
Oil well blow out control valve
An upright tubular housing is provided for downward telescoping over the upper end of a well production tubing and includes three axially spaced and inwardly projecting annular abutments sealingly...
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4417625 |
Annulus plugging
A method of plugging an elongate annulus, particularly an annulus in an oil well in which a blow-out is occurring, consists in the steps of securing hot tapping apparatus to an outer tubular member...
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4410040 |
Corrosive environment tension packer
A packer assembly and its method of use are provided, the packer assembly being carried on a first conduit for use in wells exposed to corrosive injection fluids, the well being encased by a second...
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4408662 |
Retrievable packer for oil well casing
A retrievable packer for use in an oilwell casing, the packer having a central shaft with means at the upper end for attachment of an insertion or retrieval tool, an upper body portion having an...
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4403660 |
Well packer and method of use thereof
A packer and a method of setting a packer is disclosed that combines features of both compression-set packing elements and inflatable packing elements. The packing element of the packer includes...
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4399873 |
Retrievable insert landing assembly
Apparatus and method of positioning and seating a retrievable insert landing assembly within a packer bore receptacle in a well bore. Means are provided for releasably securing a landing assembly...
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4396066 |
Method and apparatus for effecting sealed connection to upstanding irregular end of tubing positioned in a well
An improved apparatus and method are provided for effecting a sealed connection to an upstanding end of a tubular member in a subterranean well where the upstanding end of the tubular member is of...
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4388971 |
Hanger and running tool apparatus and method
A conduit gripping tool such as a packer or hanger is provided for use in subterranean wells, together with a running tool and a method for installing the gripping tool in the well. Threaded means...
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4385663 |
Packerless well completion assembly
A subsurface well bore completion assembly without convention inflatable or cup packer elements. The completion is effected by cementing a member having an internal sealing surface in place within...
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4378843 |
Method for completion of wells
A method of completing wells comprising: an inflatable packer used to plug the borehole below the producing formations; casing being run from the surface to a point above the producing...
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4378051 |
Driving device for displacing an element in a conduit filled with liquid
The device, which is connected to an element to be displaced, comprises a tubular body surrounded by sleeves which are inflated to a diameter slightly smaller than the diameter of the conduit. A...
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4375240 |
Well packer
Disclosed is a hydraulically operable well packer for releasable setting within a well conduit, including a seal assembly for sealing the packer to the conduit and an anchor assembly for anchoring...
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4372389 |
Downhole water pump and method of use
A borehole water pump having an inflatable packer to permit the borehole casing to be used as the water conduit to the surface. The pump may be operated by a line shaft extending from the surface...
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4372393 |
Casing bore receptacle
A sealing assembly comprising a casing bore receptacle, an annular packoff member, and a tubing carried mandrel for use in establishing sealing integrity between a fluid transmission conduit or...
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4371038 |
Apparatus and method for injecting fluid into a well
An injection assembly includes a packer set in the casing adjacent to the producing zone, having a bore sized to receive production tubing. A portion of the assembly suspended from the string of...
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4364432 |
Seal assembly
Disclosed is apparatus for sealing between two concentric annular surfaces whereby the sealing engagement may be disrupted in response to an excess pressure differential acting on the sealing...
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4361188 |
Well apparatus actuating means having pressure accumulator means and method of use
Well apparatus, in which a pressured fluid accumulator is used to perform a function when the apparatus is disposed downhole in a well, such as to operate a valve to control fluid flow through a...
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4357992 |
Fluid pressurization apparatus and technique
The apparatus and technique are applicable to fluid pressurizing a portion of an elongated hole in the ground when a hollow tubular fluid transmission member is installed lengthwise therein....
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4353420 |
Wellhead apparatus and method of running same
A well apparatus and method of running same, which apparatus includes a hanger body with a downwardly facing external shoulder adapted to land on a wellhead housing landing seat and having an...
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4339000 |
Method and apparatus for a bridge plug anchor assembly for a subsurface well
A method of fabrication and the resulting structure for an economical and reliable anchor assembly to retain a conventional bridge plug within the production casing of an oil or gas well. The...
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4314608 |
Method and apparatus for well treating
A method and apparatus are disclosed for sequentially treating two vertically separated zones in a well bore, utilizing a packer having a fluid passageway therethrough set between the zones, a...
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4304299 |
Method for setting and orienting a whipstock in a well conduit
A method is provided for the angular orientation of a whipstock having an arcuate tool directing face and a whipstock anchor in a packer which is installed in a well, the packer and the anchor...
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4291768 |
Packing assembly for wellheads
A packing assembly is mounted in the annular space between a tubing hanger and a tubing head of a wellhead assembly. The packing is bottomed on a shoulder of the tubing hanger and energized after...
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4290484 |
Seal receptacle assembly
A seal receptacle assembly is provided for affixation on a well conduit. The seal receptacle assembly can be provided to permit telescopic contraction and expansion of the well conduit in response...
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4274489 |
Retrievable bridge plug and method of setting
A bridge plug tool is disclosed, for temporarily plugging off a well casing to perform a downhole operation, such as cementing, or acidizing. The tool includes a mandrel having separate thread...
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4258792 |
Hydraulic tubing tensioner
An apparatus or tool for applying tension to a tubing string. The tool comprises a housing and a sleeve within the housing. One end of the housing is attached to the tubing string and the opposite...
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4253676 |
Inflatable packer element with integral support means
The inflatable bladder means of the inflatable packer of the present invention includes an integral support means for bridging an annular space between the packer and a well casing, to increase the...
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4252195 |
Well test systems and methods
A well packer and depending foot valve are landed in a well. A landing nipple depends from the foot valve. A tubing string sealingly engages the packer and includes a circulating valve. A...
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4237979 |
Valve for hydraulic setting packer setting tool and method of setting a hydraulically settable packer therewith
A valve assembly is mounted with the setting tool for a hydraulically actuated well packer. The valve is located at a fluid passage in the setting tool and movable to control fluid flow from inside...
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4137970 |
Packer with chemically activated sealing member and method of use thereof
A tool, e.g., a well packer, for restricting the flow of fluid through an annulus defined by the interior walls of a fluid conduit, e.g., well casing, and the exterior of a tubular member, e.g.,...
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4098341 |
Rotating blowout preventer apparatus
Rotary blowout preventer apparatus includes: (a) an upright tubular body adapted to receive an annular packer to be constricted about a rotating well element, (b) and a rotary annular assembly...
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4083408 |
Well completion apparatus
Well completion apparatus for disposition in a well conduit comprising first and second seal assemblies. The first seal assembly comprises a first cylindrical receptacle member fixed with respect...
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4076079 |
Full bore fracture treating assembly
A full bore fracture treating assembly is provided for use on oil and gas wells during a fracture treatment down casing to provide a full bore capability for running a casing packer or perforating...
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4071084 |
Well packer
Disclosed is a retrievable, weight set well packer which may be tightened in set configuration by rotation of the tubing string, and which may be released from set configuration by longitudinal...
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4050517 |
Geothermal energy well casing seal and method of installation
A geothermal energy transfer and utilization system makes use of thermal energy stored in hot solute-bearing well water to generate a thermal working fluid from an injected flow of clean fluid. The...
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4040485 |
Method of simultaneously setting a packer device and actuating a vent assembly
A packer actuated vent assembly comprising a packer device settable by reciprocal movement of a mandrel, a valve actuator in the form of a barrel attached to the packer body, and a mandrel...
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4019580 |
Apparatus and method for running, setting and testing a compression-type well packoff
An apparatus and method for running a compression-type annulus packoff on a drill or other pipe string into an oil or gas well, setting the packoff without rotating the drill string, and then...
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3965987 |
Method of sealing the annulus between a toolstring and casing head
Method of going into and coming out of a cased borehole with a toolstring of varying outside diameter wherein the annulus formed between the toolstring and the borehole wall near the casing head...
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3921720 |
Hydraulic packer apparatus and method
An hydraulic packer apparatus having means for setting and resetting said apparatus without necessity of retrieving the apparatus to the well surface.
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3897826 |
Method for well workover operations
Method and apparatus for providing tubing pack off for well operations and includes a pair of spaced apart stripper rubbers for packing off tubing in a tubular stripper assembly and which form an...
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3889959 |
Earth drilling apparatus
A drilling apparatus for pressure drilling through the earth, comprising a drill string, a casing tube assembly, a rotary drilling machine with mechanized drill string handling and a liquid...
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3876003 |
Drill stem testing methods and apparatus utilizing inflatable packer elements
Methods and apparatus for isolating a well bore interval utilizing spaced inflatable packer elements and a pump suspended in the well on a pipe string. The pump includes an inner member connected...
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3866681 |
METHOD AND APPARATUS FOR ESTABLISHING A PACKER
A method for establishing a packer around a tubing in a down hole location comprising forming an obstruction in the annulus between the tubing string and the well bore at the location where the...
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3847215 |
UNDERWATER WELL COMPLETION METHOD AND APPARATUS
Extended casing method and apparatus for completing an underwater well whereby complete and continuous pressure control is maintained at the surface drilling platform. A conductor casing is...
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3830304 |
WELLHEAD ISOLATION TOOL AND METHOD OF USE THEREOF
Apparatus for isolating a production tubing string in an oilwell from the control head whereby pressures higher than the rated pressure of the control head may be applied to the producing...
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3724550 |
METHODS FOR RECOMPLETING WELLS
As a preferred mode of the new and improved methods disclosed herein for recompleting a production well without removing an existing production string, an intermediate length of the production...
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3669190 |
METHODS OF COMPLETING A WELL
A method of completing a well by installing in the well a flow conductor, performing various operations such as cementing the flow conductor in the well bore, drilling out excess cement from the...
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3637261 |
TOP LATCH SELECT LINER WITH TAILPIPE AND METHOD OF INSTALLING
A top latch select liner is shown which provides for the attachment at the top of a select liner of large pipe assemblies for use in solution mining operations. A method of lowering tailpipes of...
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3598183 |
METHOD AND APPARATUS FOR TREATING WELLS
A method of preventing the flow of fluid into a low-pressure zone of earth formation traversed by a well bore when said fluid is placed in the well bore, in which a liner is temporarily employed to...
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3568773 |
APPARATUS AND METHOD FOR SETTING LINERS IN WELL CASINGS
An apparatus and method for setting a production liner within a well casing providing an elongated tubular setting sleeve adapted to be mounted on the upper end of such a liner and to be loosely...
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