With sealing feature (e.g., 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 movement of the tubing string. Locking means maintain the packer set when the tubing string is raised slightly...     

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 gun with wellhead pressure remaining at the surface. The assembly includes a modified tubing hanger which...     

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 to the well conduit and a first insert member including a first tubular body portion received within the...     

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 carried in the body to rotate relative thereto and with the packer when the packer is constricted about said...     

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 transducer-valve fitting may be run with the packer foot valve assembly or it may be run at a later time and landed...     

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 end of the sleeve is attached to the tubing string. Hydraulic fluid pressure acts upon a piston carried...     

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 to heating, cooling, or pressurization of the well conduit. The seal receptacle assembly includes an inner...     

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 the tubing hanger has been fully seated within the tubing head by the injection of a lubricant or the like...     

A geothermal well head assembly that is removably mounted on the upper flanged end of a surface string of casing that is submitted in the upper portion of a bore hole that extends to the heated zone. A second string of casing is concentrically disposed in the first casing and extends to the heated zone,...     

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 conduit having a locking recess defined therein, such as by having first and second conduit members, the...     

Disclosed is a 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 the packer to the conduit. The packer is set in stages by hydraulic pressure. The seal assembly is extended, and locked, in sealing...     

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. According to the technique, inflatable closure means are installed in the hole at a site adjacent the distal end...     

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 apparatus in one axial direction sense. Elastic means restore the apparatus to its sealing configuration upon...     

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 tubing and an outer conduit or casing, is disclosed. The casing bore receptacle is incorporable in the casing...     

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 the packer to the conduit. The seal assembly includes sealing members for engaging the conduit as well as...     

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 formation; the casing annulus being sealed off above the producing formation; the producing formation being underreamed...     

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 the well then running tubing string terminating with a sealing adapter having matching sealing face into...     

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 in the packer bore receptacle by engaging an annular groove in the PBR with latching elements on the landing...     

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 conduit having a locking recess defined therein, such as by having first and second conduit members, the...     

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 within which the annulus is situated; forming a hot tapping in the outer tubular member; injecting, through...     

A retrievable well packer is shown of the type adapted for releasable setting within a well conduit. The packer has a central mandrel extending within an outer assembly, seal members carried on the outer assembly for sealingly engaging the conduit, anchoring slips carried on the outer assembly for grippingly...     

A permanent thermal packer is disclosed for sealing the annulus between an injection tubing string and a well casing. The packer is thermal cement and is placed from within the injection tubing string to seal a substantial portion of the annulus above the injection zone. The packer provides a means for...     

A rotary blowout preventer having a radially compressible packing to be sealingly engaged with and rotated by a drill pipe or kelly and a hydraulically actuated wedging piston for compressing the packing is provided with a rotatable bearing support which in an exemplary embodiment includes an inverted...     

Mechanism for achieving the radial expansion of an annular elastomeric pack-off unit between the bore of a casing and the exterior of a liner, comprises a tubular sealing assembly threadably connected between the liner and the hanger and defining two inwardly projecting annular seals, an annular fluid...     

An adapter kit is shown for attaching a setting tool of the type having a power actuated outer sleeve and a cooperating inner tubular member to a well packer. The adapter kit includes a tubular mandrel having an upper end which is adapted to be connected to the setting tool inner tubular member and has...     

A hydraulic setting tool is shown of the type used to set a downhole device in a well bore. The setting tool includes an elongated tubular body adapted to be supported from a wireline within the well bore. The body has an outer sleeve portion and an inner piston portion slidably received within the sleeve...     

A packer actuated vent assembly comprising an outer barrel attached to a packer body, and a mandrel extension attached to the lower end of the mandrel of the packer. A valve means on the mandrel extension has a slidable valve element which slidably engages a medial portion of the outer peripheral surface...     

There is disclosed a dual well string, hydraulically operated, retrievable packer in which one mandrel connectible with one well string is releasably connected to the body means of the packer to permit it to be lowered therewith, and the other mandrel connectible to the other well string is vertically...     

An improved seal assembly is shown for use in an oil well packer of the type having a packer body having a longitudinal bore, a packer carried on the body for sealing off the annular space between the body and a surrounding well conduit, a mandrel slidably disposed within the body longitudinal bore,...     

An annular packoff assemblage is provided for selective engagement with any one of a plurality of casing seal bore receptacles spaced along a casing string. The packoff assemblage includes an upper latching assemblage for cooperation with an upwardly facing no-go shoulder providing in the selected seal...     

A geothermal expansion wellhead system is provided which adapts the wellhead and control valves to the casing in the wellbore. The system suspends and seals the casing while expanding and contracting during geothermal operations at temperatures up to 550.degree. F. and above. The system consists of an...     

Apparatus and method are disclosed for feeding a cablehead assembly into the side of a drill string. The cablehead is passed through a low angle side entrance in a side entry sub into the drill string. A cartridge assembly is seated in the side entrance around the cable to prevent pressure loss through...     

A method and apparatus for using a submersible pump to lift reservoir fluids in a well while having the tubing/casing annulus isolated from the produced fluids. The apparatus allows the submersible pump to be positioned above the annular packoff device. The apparatus comprises an outer shield that encloses...     

A steam or thermal packer for use in subterranean wells having an integral expansion joint is disclosed. The packer has a multi-component, nonresilient, nonenergizing packing element, as well as a multi-component, nonenergizing, nonresilient sealing element engaging the expansion joint. Energy is stored...     

A torque multiplier subsea tool for setting a seal between a casing hanger and a subsea wellhead includes a mandrel having a sun gear with axial elongate teeth. An outer barrel is disposed around the mandrel forming an annulus therebetween. A planetary gear assembly is disposed in the annulus between...     

There are disclosed several alternate embodiments of wellhead apparatus of the type in which hydraulic fluid may be transmitted to and/or from a subsurface safety valve or other hydraulically operable device within the well through an annular space formed between the production tubing.

A selective injection packer apparatus includes a housing having a longitudinal housing bore therethrough. A mandrel has a longitudinal mandrel bore therethrough and is slidably disposed in the housing bore. Upper and lower longitudinally spaced compressible packers are disposed about the housing. Upper...     

A well casing packer includes a seal mechanism, mounted on a mandrel. The casing packer comprises a seal element and a wedge member for driving the seal element radially outward against a well casing by applying radial forces to the seal element. This wedge member and a support member support the seal...     

In a completion of an oil well where the well bore traverses the earth formations, a multiple series of inflatable packer elements are employed with each packer element having a defined sequential dependency of inflation to inflate the lowermost packer first then to inflate the packers in a sequence...     

In a completion of an oil well where the well bore traverses the earth formations, a multiple series of inflatable packer elements are employed with each packer element having a defined sequential dependency of inflation to inflate the lowermost packe first then to inflate the packers in a sequence from...     

A tubing string resettable bridge plug is conditioned for initial wireline installation in a well utilizing an adapter within a mandrel carrying the slip assembly of the bridge plug and frangible connecting means between the sealing assembly and mandrel to place the sealing assembly in an alternate transport...     

A hanger for hanging a string of conduit within a wellhead has a metal-to-metal seal. The hanger has a body that locates within the wellhead and provides an annular clearance between the body and the wellhead. A locking device fits within this clearance to lock the hanger against axial movement. The...     

The subsea wellhead system includes a wellhead, a housing seat disposed in and connected to the wellhead, a casing hanger supported by the seat, a holddown and sealing assembly in the annulus between wellhead and hanger, a running tool attached to the hanger for lowering it into the well and initially...     

An equipment insert is shown for use within a section of well pipe. The equipment insert is installed within the pipe bore at the well surface. The equipment insert is run into the bore of the well pipe and manipulated with a hand tool to actuate gripping slips and a seal ring to grip the pipe interior...     

A slide joint is shown which is used to provide a floating seal between an inner floating member and a surrounding conduit in a well bore. The floating member has a clutch element which is engaged at one end thereof. A circumferential, compressible packing is carried on the exterior of the floating member...     

A method and apparatus for inserting a seal stack in a seal bore defined by a well tool located downhole where ambient conditions would cause radial swelling of the seal stack. The seal stack is mounted at the surface in a confined space defined between a mandrel and a constraining sleeve shearably connected...     

A well surging system includes an elongated housing assembly having a central flow bore therethrough. Upper and lower independently operable ball valves are disposed in the housing assembly. Each of the ball valves is movable between a closed position and an open position. When the ball valves are in...     

Methods and apparatus for effecting a fluid-tight seal between a surface of an oil and/or gas well tubing or casing and a wellhead member are provided, wherein the surface has been unprepared to form the seal. The wellhead member is positioned circumferentially about a stub of the tubing or casing. A...     

A retrievable production seal assembly is shown for engaging and sealing within the internal bore of the liner within a well. A special latch mechanism carried on the seal assembly includes an externally threaded latch collet which can be stabbed into the setting sleeve threads which are normally provided...     

A well packer is shown of the type having a packer head and a pair of tubular extending downwardly therefrom. An upper seal, a gripping assembly, a lower seal and a lock body are all located about the mandrels extending successively downwardly from the packer head. An actuator within the lock body is...     

The fixation of a packer or other borehole device is provided by explosively bonding the device to the borehole casing in the desired location. The explosively set packer is oriented in the borehole casing on a setting tool which preferably includes a casing scraper to clean the interior surface of the...     

A running tool (RT) comprising a stem (10) with a torque ring (44), a running nut (36), an engagement sleeve (40), and a lock ring (42) to releasably connect and support a casing hanger (C), a two piece (16,20) wear bushing (WB) and packoff assembly (P) thereon. The lock ring (42) is wedged into engagement...     

Downhole apparatus for converting conventional petroleum wells to gas lift or chemical injection operation by perforating the well tubing at the desired depth and thereafter installing a packoff anchor within the well tubing, without disturbing the setting thereof, to bridge the perforation, the packoff...     

Disclosed is apparatus and method for a system useful in establishing a metal to metal seal between conduit joints in wells. A milling tool having means controlling down force on and positioning the cutter is used to cut and/or finish a seat on a shoulder in a well conduit, which will mate and seal with...     

A method for completing a drainhole wellbore with casing but without conventional cementing of the casing wherein in the drainhole portion of the wellbore a casing string composed of alternating casing subs and external casing packer subs is employed, the external casing packer subs carrying an elastic...     

Disclosed is a method of preparing an inflatable packer including a mandrel and a sleeve for insertion into a fluid filled well bore. The method includes pressure testing the sleeve and its connection with the mandrel with a gas without introducing any incompressible fluid between the area of contact...     

A multiple well string packer of the type wherein the packer is lowered into a well bore on one of the well strings, and the one string hung off from the wellhead so that the packer may be set at a desired level therein, and wherein the packer, when unset, is retrieved from the well bore on the same...     

An improved wellhead structure including a wellhead housing having a sealing surface with grooves therein and pressure compensating material in the grooves, a sealing sleeve having inner and outer resilient seal rings and an internal actuating groove with upper and lower shoulders, an actuating ring...     

A tubing string resettable packer is conditioned for initial wireline installation in a well utilizing an adapter within a mandrel carrying the slip assembly of the packer and frangible connecting means between the sealing assembly and mandrel to place the sealing assembly in an alternate transport condition...     

An improved annular seal and hanger which are to be installed in a wellhead housing. The annular seal assembly includes seal ring having a central body with upper outer rim, upper inner rim, lower outer rim and lower inner rim extending from said central body, an upper wedge ring, a lower wedge ring...     

A bridge plug having upper and lower slips for anchoring the plug and an elastomeric packing element for sealing within a well casing. The bridge plug may be set either mechanically or through a wireline pressure setting assembly. The small outer diameter of the bridge plug allows for fast run in and...     

There is disclosed apparatus for use in completing oil or gas wells having two or more perforated production zones which includes packers and assemblies for closing off the annular space between the tubing string and the well bore intermediate adjacent zones to isolate one from the other in order to...     

A hydraulic release tubing seal divider for connecting lower and upper tubing strings together in a wellbore, including an inner housing assembly connected with one of the tubing string and middle and outer housing assemblies connected with the other of the tubing strings, including hydraulically operable...     

A hydraulic setting tool for packers. The setting tool comprises a case with a ball valve therein, a bypass passageway for bypassing around the ball valve when the ball valve is in a closed position, a fill valve for closing the bypass passageway when desired, and a packer setting sleeve for hydraulically...     

A packer assembly is provided suitable for multiple setting and unsetting operations in a well bore during a single trip to seal the annulus between the interior walls of the well bore and a tubing string. Thge packer is set by dropping a metal ball which plugs the passageway through the tubing string,...     

A packer setting tool is disclosed for providing quick and reliable release thereof from a well casing packer. The setting tool is adapted for lowering the packer assembly within the casing. The setting tool is rotated by a drill string to release an upper set of packer assembly slips into engagement...     

An easily drillable production packer for use in testing, treating and squeeze cementing operations in wells which may be easily converted by securing an appropriate baffle, profile, valve assembly or plug assembly to the lower end of the mandrel thereof.

A unitary assembly (10); is disclosed for isolating a leak in a side pocket mandrel (12) between the tubing annulus (16) about a tubing string (14) and the interior (20) of the tubing string. The unitary assembly includes an upper packer (22), and a lower packer (24) interconnected by a tailpipe (26)....     

Device combinations and methods for wellbore operations for simplifying production methods and workover operations and for production from a failed secondary zone. Using a commercially available prior art coil tubing unit, a coil tubing string is run into an already-in-place production tubing string....     

A system for cementing liners in well bores where a liner and drill pipe are made up in telescopic relationship with the lower end of the drill pipe having a polished mandrel or slick pipe slidably and sealingly received in a sealing bore receptacle in the lower end of the liner at a location just above...     

A method for servicing an offshore well having a subsea blowout preventer. A sealing nipple having a wireline extending therethrough and connected to a servicing tool is lowered into the well and sealed by sealing rams of the blowout preventer. After the sealing rams are closed about the sealing nipple,...     

A metal seal for sealing against casing in a well has a plurality of circumferentially axially spaced metal bands. An inlay material partially fills the cavities located between the metal bands. The metal bands are soft enough to deform when the seal is pressed into contact with the casing. The bands...     

A locking mechanism for anchoring a tubing string to a hollow bore sump packer located at a position in a subterranean well. The locking mechanism is attachable to the end of a tubing string and incorporates radially shiftable locking members which are engagable with an internal, downwardly facing shoulder...     

A well sealing apparatus, and method of use, which seals between tubular goods and a well casing without the use of a sealing tool run separately. The apparatus has a resilient skirt which is sealed against the well casing by split rings which are released from containment by the assembly as the assembly...     

The present invention provides an apparatus for anchoring of equipment within the interior bore of a section of a subterranean well conduit, and particularly for insertion of such equipment. The apparatus comprises a cylindrical housing and a conically tapered surface around the exterior of the housing...     

An inflatable well tool and method of use is provided. The tool has a central body and an annular inflatable packing element. A fluid passageway transmits pressured fluid for inflation purposes. One end of the packing element is secured relative to the tubular body while the other end is selectively...     

A straddle packer apparatus includes a housing having a central opening. The housing has inflation passages, treating fluid passages, and equalizing passages defined therein. Upper and lower longitudinally spaced packers are mounted on the housing on opposite sides of an outlet of the treating fluid...     

An inflatable packer construction where the inflatable elastomer element is; (1) constructed from the same type of rubber compound from end-to-end and the rubber is cured differentially from end-to-end so that inflation is from one end to the other end; (2) is constructed of rubber having different characteristics...     

An arrangement for lowering into a well bore casing on an operating string to sealably engage a packer that is supported on a tubular member so that the packer can be set either by a combination of hydraulic or mechanical action or mechanical action alone or hydraulic action alone includes a packer supported...     

An apparatus for locking a packer against premature actuation in a well bore. The locking apparatus includes a sleeve attached to a lower end of the packer and spring biased locking members adjacent to the sleeve. When in a locked position, lugs on the locking members engage a groove in the sleeve and...     

A wellhead isolation tool is presented which includes an expanding nipple operable from outside the wellhead and casing, the nipple and its concentric mandrels being inserted into the wellhead and thus down through the wellhead array and into the casing or tubing by a single hydraulic cylinder and then...     

There is disclosed an offshore well installation wherein a shoulder of a casing hanger body supported within a casing head on a platform at the water surface has been lowered onto a seat in the head so as to support a casing string anchored at its lower end to a mudline hanger in tension, the lower end...     

Improved methods and apparatus are provided for sealing at the uppermost end of a casing string to provide circulation from adjacent the lower end of the casing string and into a well bore to enable the casing string to be more easily lowered into the well bore. A casing circulator is provided for lowering...     

An improved wellhead annulus seal installation tool and preload retention apparatus is disclosed particularly adapted for metal-to-metal seals. The seal installation tool includes a telescoping mandrel with a torsion spring attached and a torque sleeve rotatably mounted thereon with a pair of antirotation...     

A method and apparatus for sealing a well annulus, the apparatus comprising a resilient sealing element molded in a upwardly oriented frustro-conical form affixed to a packer body. A running tool is mated with the packer body, the running tool having an internal bore adapted to collapse the sealing element...     

The present invention relates to a novel horizontal well bore system. More particularly, the invention relates to the setting of a conductor casing, drilling a well bore to a horizontal position, drilling and screening the horizontal/lateral section of the well, filter packing the well screen, and installing...     

A pack-off tubing hanger is shown for use in a tubing string extending from a well surface location to a downhole location within a well casing. The hanger body includes an external packing element and gripping slips which support the hanger body within the surrounding casing. A longitudinal passageway...     

A well packoff assembly can be set on wireline and reset at a new location on tubing. The packoff assembly has a check valve that actuates when a retrieving tool is lowered into contact with the packoff assembly. The check valve allows fluid below the packoff assembly to flow up if the pressure is greater,...     

A method for sealing a well to prevent ground water contamination in which the existing perforate casing is at least temporarily intermally capped. Thereafter, a new imporforate casing is palaced about a portion of the length of the existing casing extending to a predetermined depth. Sealant is injected...     

An assembly for installation within the end of a joint of casing or liner for use in a downhole environment where the casing or liner is disposed in the borehole which traverses earth formations. The assembly includes an annular split ring expander and an annular split ring slip element and a self-energizing...     

A retrievable bridge plug apparatus, and associated methods, are provided for sealing the bore of a drill pipe string to control a well that is flowing out of control.

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 casing of the wellhead. In another extreme position, the cup is shifted away from the seal releasing the latter...     

A tool is disclosed for inserting an oil wellhead isolation device into a well casing. The device includes a mandrel which is threaded on its exterior and which forms a part of a ball nut displacement drive system. The drive nut and its associated mechanical drive components are disposed within a drive...     

A downhole packing mechanism for achieving sealed engagement with the bore of a well conduit comprises a mandrel positionable within a well by a tubing string. Surrounding the mandrel is a tubular body assemblage which is connectable to the mandrel for run-in purposes by a control dog and slot arrangement....     

The invention is an oil well capping device that may be forced into an oil well casing through which oil and/or gas under high pressure is emanating, to temporarily completely obstruct the flow of such oil until repairs to the well head structure have been completed before the device is removed, and...     

A well tool having an anchor device, straddle packers above and below a port and an internal valve which are operated by longitudinal motion in an inflatable packer device. The well tool anchor is armed by a hydraulic operated plug and set upon downward motion in a locating profile groove in a well bore....     

Improved methods and apparatus are provided for inputting fluid into the uppermost end of a casing string gripped by an elevator supported from a traveling block by a pair of bails. The concepts of the present invention may be used to provide circulation from adjacent the lower end of the casing string...     

Methods are provided for isolating segments of a horizontal wellbore drilled through an unconsolidated formation and treating the well to control rates of fluid flow into selected segments of the wellbore. The methods include screen segments separated by blank pipe segments to provide isolation outside...     

A body (B) having a collapsed resilient element (55) therein is releasably secured on a mandrel (M). A packer (P) is supported on a packer support (26) on the mandrel. As the packer tool is assembled, opposed lugs on the mandrrel are placed in a J slot (54) of a member (25) so the packer is capable of...     

A pipe plugging system useful for plugging oil well pipes for stopping oil flow from an oil well pipe. An inflatable plug is insertable on a tube through the top of the pipe and is inflated by a fluid under pressure released into he plug to expand the plug against the pipe wall. A blocker at the lower...