Abstract: A fixed-point packoff element for a full-bore pressure isolation tool supports a primary seal and a test seal to permit the primary seal to be tested by injecting test fluid through a side port of a tubing head spool before the pressure isolation tool is rigged up for a well stimulation procedure.

Abstract: Spool apparatus for use in an underground well having casing, comprising a body sized for travel in the well casing, the body defining a well fluid flow duct having a downward facing entrance and a sidewardly facing exit, there being a lower connection for coupling the body to lower well pipe to pass fluid into the body via the entrance, and an upper connection for coupling the body to upper carrier structure used for raising and lowering the body in the well casing, and there being means to latch connect the body to the well casing in a position for well fluid delivery from the body via the exit.

Abstract: A tubing component for use in a downhole environment including a tubular having a plurality of openings therein and a plurality of beaded matrixes disposed in the plurality of openings the beaded matrixes being configured to be pluggable in situ in the downhole environment. A method for controlling flow in a wellbore.

Abstract: A drum washing machine having a gasket to prevent leakage of water in the tub and the laundry from being stuck in a laundry opening part. The washing machine including a cabinet having a first opening through which a laundry is put in the cabinet, a tub installed in the cabinet to have a second opening corresponding to the first opening, a drum installed in the tub to have a third opening corresponding to the second opening, and a gasket including a leakage preventing part having one end connected to a rim of the first opening and the other end connected to a rim of the second opening to prevent water leakage and a laundry-stuck preventing part provided on an inner circumference of the leakage preventing part to prevent the laundry from being stuck in a space between the first and third openings.

Abstract: Systems and methods for guiding a seal assembly associated with a string of production tubing, or a tubular member generally, into a receptacle within a wellbore. The muleshoe of a seal assembly is provided with an auto entry guide device in the form of a guide member or kickover lug that is radially moveable with respect to the muleshoe. The kickover lug is collapsible radially inwardly and biased radially outwardly. The auto entry guide device may also include a centralizer bowspring that is mounted upon the muleshoe. Additionally, the muleshoe is mounted for rotational movement with respect to the seal assembly.

Abstract: A non-rotational casing hanger and seal assembly running tool for use in oil and gas drilling operations has a mandrel and a tool body that is carried by the mandrel. The tool body supports a plurality of latching segments for releasably connecting the tool body to a seal assembly. A plurality of latching dogs on the tool body releasably connect the tool body to a casing hanger. Axial movement between the tool body and mandrel operates a pressure responsive shuttle piston positioned on the mandrel to urge the seal assembly into sealing position. A ball valve positioned in the mandrel bore is operable between open and closed positions to allow independent operations to be carried out such as cementing the casing hanger in position through the mandrel bore and operating the shuttle piston to then allow overpull to unlatch the tool from the casing hanger for retrieval.

Abstract: The invention relates to a seal for use with a pipe and flange assembly. The seal is intended to prevent leakage during axial movement of the pipe relative to a flange. The invention comprises a central cylindrical elastomeric member located between two circular elastomeric end rings.

Abstract: A system for injecting a treatment fluid into a well, the system includes: a surface controlled subsurface safety valve; a valve control conduit which extends from the surface controlled subsurface safety valve to a wellhead of the well, wherein the surface controlled subsurface safety valve is controlled by varying the fluid pressure in the valve control conduit; a fluid injection opening in the valve control conduit effective for discharging treatment fluid into the well; a treatment fluid injection conduit arranged which is connected to the valve control conduit; at least one treatment fluid injection opening; and a one way check valve which prevents fluid flow from each treatment fluid injection opening via the treatment fluid injection conduit into the valve control conduit, wherein the treatment fluid injection conduit is arranged into a section of the well which is located below the surface controlled subsurface safety valve such that at least one treatment fluid injection opening is located below the

Abstract: A sand control screen assembly (60) that is positionable within a wellbore includes a base pipe (62) having at least one opening (64) that allows fluid flow therethrough and a filter medium (66) positioned exteriorly of the base pipe (62) that selectively allows fluid flow therethrough and prevents particulate flow of a predetermined size therethrough. An isolation member (68) is positioned interiorly of the base pipe (62) forming an annulus (84) therewith. A one-way valve (86) is slidably operable within the annulus (84). The one-way valve (86) controls the flow of fluid through sand control screen assembly (60) such that fluid flow is selectively prevented from the interior to the exterior of the sand control screen assembly (60) but is allowed from the exterior to the interior of the sand control screen assembly (60).

Abstract: The present invention generally relates to a method and an apparatus for stimulating the production of an existing well. In one aspect, a method of treating a well is provided. The method includes inserting a selective treatment assembly and a plug assembly into a partially lined wellbore until the selective treatment assembly is positioned proximate an area of interest. Thereafter, the selective treatment assembly is activated to isolate and treat the area of interest. Next, the selective treatment assembly is deactivated and urged toward the surface of the well until the plug assembly is seated in a polished bore receptacle disposed in a string of casing. At this point, the treated portion of the wellbore is separated from the untreated portion. Thereafter, the pressure in the untreated portion of the wellbore is equalized with the surface of the well and then the selective treatment assembly is removed from the wellbore while the plug assembly remains in the polished bore receptacle.

Abstract: An expansion-set fluid production assembly transfers well fluids from a casing string 12 to a production tubing string 112. A tubular anchor 72 and tubular expander 70 may be positioned downhole on a running tool at a desired depth along the casing string 12. An actuator assembly 10 may forcibly move the tubular expander 70 into the tubular anchor 72, expanding the tubular anchor 72 to seal and secure the tubular anchor 72 against the casing string 12. The running tool actuator assembly 10 may be removed, leaving the expanded tubular anchor 72 and tubular expander 70 downhole. A seal nipple 122 may be sealed with the tubular expander 70 and to the production tubing string 112. Fluids may then be recovered from the wellbore through the casing string 12, through the fluid production assembly, and into the production tubing string 112.

Abstract: A running tool that delivers an object selectively to one of a plurality of landing nipples and then releases from the object is disclosed. The tool is actuated by raising it after it has passed the desired landing nipple to release a locating dog. The locating dog places locking dogs on the object even with a groove on the landing nipple. Movement of the tool downhole secures the locking relationship and releases the running tool from the object. A sheer pin allows testing at the surface that the object is locked in place, prior to removal of the running tool. The object comprises a fishing neck to allow it to be subsequently retrieved.

Abstract: An apparatus that is usable with a subterranean well includes a latch and an engagement mechanism. The latch is adapted to form a releasable connection between a first conduit section and a second conduit section in response to engagement of an actuator of the latch and maintain a first distance between an end of the first conduit section and an end of the second conduit section. The engagement mechanism is adapted to continuously engage the actuator to cause the latch to connect the first conduit section and the second conduit section despite the movement of the engagement mechanism between a first position and a second position. The second distance between the first position and the second position is greater than the first distance.

Abstract: One or more templates are provided for circulating fluids in a main well bore and for drilling and completing at least one offset well bore from the main well bore. Each template has a body, an inlet leg, a main outlet leg, and an offset outlet leg. A straddle assembly is mounted in the template to configure the template for fluid circulation. The straddle assembly, in cooperation with the inlet and main outlet legs, effects a downhole flow path which directs fluids from the inlet leg through body of the template and out the main outlet leg, bypassing the offset outlet leg. The straddle assembly is distally displaced from the template to reconfigure the template for drilling. A diverter is placed in the body of the template upon displacement of the straddle assembly to define a drill string path from the inlet leg to the offset outlet leg. The offset well bore is drilled by conveying a drill string through the drill string path.

Abstract: The present invention relates to portions of casing that are inserted into a wellbore. The casing portions are provided with a protected portion in which a friction and/or sealing material can be located. In certain embodiments, the protected portion is provided by first and second annular shoulders that are spaced-apart axially along the length of the casing. The friction and/or sealing material is typically located on an outer surface of the casing between the annular shoulders. There is also provided a casing portion that has annular shoulders provided at either end of the casing portion, with means to connect successive casing portions located on these shoulders. The casing portion in this embodiment is provided with a friction and/or sealing material in a recessed portion of the casing portion.

Abstract: A metal seal for a wellhead assembly has upper and lower legs extending in opposite directions from each other and a rib extending radially outward from a junction of the legs. A first conical band on the upper leg extends uninterrupted from the rib a selected distance toward a tip of the upper leg. A second conical band on the upper leg extends uninterrupted from the tip of the upper leg toward the first conical band. An annular recess is located between the first and second conical bands. The lower leg also has two conical seal bands separated by a recess.

Abstract: A well tool locking apparatus compatible with high temperature, high pressure well conditions comprises a packing ring mandrel that carries a sliding locking dog cage. The locking dogs are expanded radially into a tubing nipple channel by the axial translation of a ramped step on the mandrel surface. Chevron ring packing seals are positioned between the locking dog cage and an abutment shoulder around the mandrel. Translation of the mandrel against the locking dog cage engages the tool locking dogs and expands the chevron ring seal against the inside bore surface of the tubing nipple.

Abstract: An injection probe assembly is disclosed for injecting material into subsurface formations for making geotechnical improvements. The probe assembly includes a sheath having an upper end for attaching to a mating tool string and a lower end for receiving a solid drive point. The sheath has a reduced diameter injection area which includes an interior space enclosed by a tubular sidewall, a valve seat, and a plurality of injection ports extending through the sidewall through which materials can be injected laterally. A check valve spool is arranged for sliding movement within the interior space for preventing back-flow of material into the interior space. The spool is seated on the valve seat and covers the injection ports in a first position, and is unseated from the valve seat with the injection ports uncovered in a second position. The spool is responsive to pressure changes of the injected materials.

Abstract: The invention relates to a method for setting a packer (7) in a well bore (1), wherein a production tubing (4) with a packer (7) is located in the well bore (1). Abrading means (11) of the packer (7) is radially expanded and rotated, for rounding the well bore wall (10), and packing means (9) are radially expanded against the rounded well bore wall (10). The invention also relates to a packer (7) to be included in a production tubing (4) in a well bore (1), comprising radially expandable and rotatable abrading means (11) for rounding the well bore wall (10), and radially expandable packing means (9), for sealing between the packer (7) and the rounded well bore wall (10).

Abstract: A metal seal for a wellhead assembly has upper and lower legs extending in opposite directions from each other and a rib extending radially outward from a junction of the legs. A first conical band on the upper leg extends uninterrupted from the rib a selected distance toward a tip of the upper leg. A second conical band on the upper leg extends uninterrupted from the tip of the upper leg toward the first conical band. An annular recess is located between the first and second conical bands. The lower leg also has two conical seal bands separated by a recess.

Abstract: A downhole apparatus and method for depositing metal at a desired area in a well casing. In one embodiment the apparatus comprises an oxygen tank filled with oxygen, a fuel tank filled with fuel, and a metal depositing device. An inert gas, such as nitrogen, may be supplied to dampen the heat generated by the metal depositing device. In an alternate embodiment, the apparatus comprises a gas tank with nitrous oxide therein and a sparking device to initiate a decomposition reaction to separate the nitrous oxide into its oxygen and nitrogen components. The metal depositing device may be adapted for flame spraying, plasma spraying or welding. A steering head is provided to reciprocate and rotate the apparatus so that the metal depositing device may be directed to the desired area in the casing. A camera and light are disposed at the bottom of the apparatus so that the interior of a well casing is illuminated and an image is transmitted to the operator for proper actuation of the steering sub.

Abstract: A system for permitting deployment of a polished bore receptacle, seal stack and production tubing in a single downhole trip into a wellbore. The system includes a polished bore receptacle, production tubing, a seal stack disposed about the production tubing, and a one trip seal latch that couples the production tubing to the polished bore receptacle. The seal latch includes an outer latch housing and an inner latch housing. The outer housing and inner housing are connected by a releasable coupling device. Thus, the polished bore receptacle can be moved downhole for latching to a packer without insertion of the seal stack into the interior of the polished bore receptacle. Upon latching of the polished bore receptacle to the packer, the coupler may be selectively released to permit insertion of the seal stack into the polished bore receptacle.

Abstract: A method is disclosed for installing a tubular member, having an upper end and a closed lower end, axially into and through an over-pressured region of the earth by using a mandrel to drive the tubular member from near the bottom, which results in a significant section of the tubular member being pulled through the over-pressured region. In another embodiment, a filler material is inserted into at least a portion of the tubular member, and the tubular member is driven from the upper end, with the filler material assisting the progression of the tubular member through the over-pressured region.

Abstract: A locating and locking mandrel and associated nipple provide for positioning an item of equipment in large bore and high weight conditions. In a described embodiment, a locating and locking mandrel includes at least one collect which is configured to cooperatively engage an internal profile of a nipple. The collect is capable of supporting the weight of the item of equipment until at least one locking member of the mandrel is engaged with another internal profile of the nipple. A seal of the mandrel is received in a seal bore of the nipple prior to insertion of the locating member or locking member into the seal bore, thereby preventing damage to the seal bore.

Abstract: High pressure fluid seals for sealing against a bit guide in wellhead and a method of using the seals are described. The high pressure fluid seals are primarily intended for use with a blowout preventer protector. The high pressure fluid seals are elastomeric material bonded to an end of a mandrel for insertion into the wellhead. The end of the mandrel includes an annular ridge that protrudes into the elastomeric seal to inhibit the seal from being extruded away from the bore when the elastomeric seal is seated against the bit guide and the bore is subjected to elevated fluid pressures. The advantage is a high pressure fluid seal that ensures packoff against a bit guide even if the bit guide is worn but still serviceable. A further advantage is a more secure seal that improves safety and enables the use of higher pressures during well stimulation.

Abstract: Wellhead apparatus is shown to comprise a casing hanger releasably latched to a running tool for lowering, landing and locking within the bore of a housing so as to suspend an inner casing which is suspended from the hanger within an outer casing string to which the housing is connected. The hanger includes a mandrel carrying a lock ring for locking in a recess in the housing bore, and a seal sleeve is carried by the mandrel for movement between an upper position to permit cement to be circulated through a space between the mandrel and a lower position closing the space. The tool includes a body carrying a latch ring which is held within a groove in the bore of the mandrel as the hanger is lowered and locked within the housing bore, and which may be actuated to lower the sleeve into sealed position and release the latch ring for retrieval of the tool, from the hanger within the well bore.

Abstract: A plug is provided which is specially adapted for statically setting a plug portion within an internal profile formed in a wellhead. In an illustrated preferred embodiment, the plug portion is set by application of fluid pressure to a running tool portion. When set in the profile, the plug portion is secured statically relative to the profile, thereby permitting advantageous utilization of a metal-to-metal seal on the plug portion. The plug portion includes features which maintain its set configuration in the profile. The running tool portion includes multiple pistons which enhance operation of the running tool portion. A disclosed verification tool provides an indication that the plug portion has been properly set.

Abstract: A shroud which surrounds a submersible pump is lowered into a water well along with a column pipe which carries the pump. The pump is located below the top of a screen which provides a perforated portion of the well casing. The shroud has an open bottom end located below the pump. An inflatable bladder attached to the shroud can be inflated through an inflation hose extending to the surface. The shroud may be connected with the column pipe by radial arms which maintain an open flow path between the column pipe and shroud. Water which falls in the casing when the pumping level drops below the top of the screen is not subject to aeration from the surface because of the seal provided by the bladder. The shroud around the pump creates a vacuum effect which increases the well capacity.

Abstract: A fluid loss device has a housing, a seal assembly, a running tool, and a plug. The housing of the fluid loss device is placed in a production string before a well bore is completed. The plug is attached to the running tool, and the running tool is attached to a wash pipe.The fluid loss device is activated by lifting the wash pipe and the running tool, thereby engaging the plug with the seal assembly, engaging the seal assembly with the housing, and severing the plug from the running tool. Activation of the fluid loss device inhibits fluid communication through the fluid loss device and reduces damage to the well structure behind the fluid loss device while completion operations are performed in other areas of the well bore.The fluid loss device is deactivated by forcing the plug through the fluid loss device with mechanical force or pressure, or by chemically eroding the diameter of the plug until the plug passes through the fluid loss device.

Abstract: An improved full bore nipple and associated lock mandrel provides enhanced sealing capability in tubing strings positioned in subterranean wells. In a described embodiment of the full bore nipple, a nipple body has a recessed seal surface and a latch profile formed on an internal bore of the body. In a described embodiment of the lock mandrel, an expander sleeve radially outwardly expands a circumferential seal to sealingly engage the recessed seal surface, locks a series of keys into the latch profile, and displaces another seal to sealingly engage an outer housing, when the expander sleeve is displaced axially downward relative to an inner mandrel of the lock mandrel.

Abstract: There are disclosed two embodiments of a tool for use in retrieving a cylindrical object which is stuck within a well bore, or, in the event the object cannot be retrieved, releasing therefrom to permit recovery of the tool.

Abstract: A tubing hanger has an exterior surface and carries a seal arranged inwardly of this surface. The seal has two sealing portions and, when the hanger is located in a wellhead, the seal is engaged by an activating device operated by a piston to force one sealing portion into engagement with the tubing hanger and the other portion into engagement with the wellhead. The movement of the piston can be reversed to break the seals.

Abstract: A lock assembly includes radially movable engagement or latch members configured to engage a profile within a subsurface nipple, and further includes one or more sealing assemblies. The sealing assemblies are radially expandable by enlarging the interior of diameter of the elements of the sealing assembly, such as by placing a mandrel of relatively enlarged diameter through an internal diameter of elements of the sealing assembly.

Abstract: The method and apparatus includes lowering a blanking plug assembly into the bore of an oilfield tubular member and inserting a sealing assembly on the blanking plug assembly into the seal bore of the tubular member without sealingly engaging the seal bore. A support shoulder on the blanking plug assembly lands on the landing shoulder of the oilfield tubular member. Wireline jars jar down on the lock sleeve of the blanking plug assembly to shift dog members radially outward into latching grooves in the oilfield tubular member. The lock sleeve then locks the dog members into the latching grooves. The wireline jars then jar up on a plug of the blanking plug assembly to move the plug upwardly to an upper position within the blanking plug assembly. The sealing assembly is prevented from moving upward and a tapered surface on the plug is driven through the sealing assembly thereby radially energizing the sealing assembly into sealing engagement with the outer tubular member.

Abstract: A downhole tool comprising a stinger body including a tubular extension adapted to be inserted into a first end portion of a well tubing, a seal carried on the tubular extension for sealably engaging an interior surface of the first end portion of the well tubing; and a sleeve carried by the stinger body and shiftable from a retracted position when the tubular extension is inserted into the first end portion of the well tubing, to an extended position covering the seal when the tubular extension is removed from the first end portion of the well tubing. The sleeve is held in position covering and protecting the seal by either a set of spring loaded lugs or a set of shear pins.

Abstract: A wellhead plug assembly having one or more plugs for plugging segments of a wellhead bore through which access during completion and production procedures is gained. Each plug has a shortened length that is achieved by positioning connections between several of the components of the plug assembly radially beneath the anchoring and sealing means. By placing the connections radially inward to, and in tandem with, the sealing and or anchoring means, the overall length of a given plug may be shortened to less than eleven inches for plugs to be used in conduits having internal diameters greater than one and one-half inch. Furthermore, the tandem orientation allows plug designs in which a majority of the overall longitudinal length of the plug comprises the collective longitudinal lengths of the seal and anchor means.

Abstract: Injection well fluid flow is measured by a device which has a running head and a body with a turbine type flowmeter interposed therein between the running head and discharge port means in the body. The running head may be interchangeable for positioning the body in selected positions in a tubing string in sealing engagement with a seating surface in the tubing string whereby fluid flow entering selected zones in communication with the injection well may be directly measured. The flow measuring device may include a signal storage or memory circuit disposed thereon for receiving and storing signals from the flowmeter.

Abstract: A locking system which includes landing nipples connectable in a well flow conduit and a lock mandrel to which well flow control devices are connectable. The landing nipples have an unrestricted full bore flow passage with a locking groove and profiled locating recesses with one square shoulder in the flow passage. The lock mandrel may be lowered through full bore landing nipples to automatically locate in the full bore landing nipple in which the lock mandrel is to be operated to lock and expand a seal system to sealingly engage the landing nipple. The lock mandrel utilizes locking lugs engageable in the landing nipple locking grooves. The automatic locator device has locating keys with one or two square shoulders, which locate the lock mandrel in a landing nipple. After operating, the lock mandrel is releasably retained locked and sealed in the landing nipple. The lock mandrel may be operated to disengage the landing nipple and permit the seal system to retract for retrieval from the landing nipple.

Abstract: A locking system which includes landing nipples connectable in a well flow conduit and a lock mandrel to which well flow control devices are connectable. The landing nipples have an unrestricted full bore flow passage with profiled locking and locating recesses having no square shoulders in the flow passage The lock mandrel may be lowered through full bore landing nipples and operated to automatically locate in the full bore landing nipple in which the lock mandrel is to be operated to lock and expand a seal system to sealingly engage the landing nipple. The lock mandrel employs locking keys having no square shoulders. The automatic locator device has locating keys having no square shoulders, which position the lock mandrel in the landing nipple. After operating, the lock mandrel is releasably retained locked and sealed in the landing nipple.

Abstract: A sealing apparatus is provided for sealing between concentric relatively moveable tubular members. The sealing apparatus is comprised of a plurality of retainer seal rings, made of a high temperature thermoplastic, and between each retainer seal ring is a thermoplastic seal ring constructed of a normal temperature service thermoplastic. The thermoplastic seal rings are alternately spaced with the high temperature thermoplastic retainer seal rings. The retainer seal rings and the thermoplastic seal rings are cylindrical rings having a radial cross-section of a general chevron shape. Energization to press both sets of seals into sealing engagement with the two relatively moveable tubular members is accomplished by the interaction of an axial interference fit between alternating seal rings, a diametrical interference fit between the relatively moveable wellbore surfaces and the seal rings, and wellbore fluid pressure.

Abstract: A casing or tubing hanger has a metal seal which also incorporates a locking device which locks the seal to the wellhead housing. An annular recess is formed in the bore of the wellhead housing. The seal has an energizing ring that moves downward to set the seal. A split lock ring is carried by the assembly and moves between a contracted position to an expanded position located in the wellhead housing recess. A wedge ring is carried above the lock ring by the energizing ring. The wedge ring moves with the energizing ring and has a tapered surface that engages the lock ring to push it to the expanded position when the energizing ring moves to the lower position. The lower portion of the wedge ring has a thickness that is selected so as to allow the lower portion to deflect once the lock ring is in an expanded position. This allows the energizing ring to continue downward movement if necessary to fully set the seal.

Abstract: A monobore completion system where the well is completed using a tubing conveyed perforating completion system having an automatic gun release and support for the tubing conveyed perforating guns.

Abstract: A radially locked subsea housing includes a low pressure housing having upper and lower radial lock regions, each of which regions includes a radial interference surface that is between vertical to only slightly tapered in orientation. A high pressure housing also has upper and lower radial lock regions, each of which regions includes a radial interference surface that is slightly greater in radial diameter than the corresponding interference surface of the low pressure housing. The interference surfaces of the upper and lower radial lock regions form upper and lower interference fits, respectively, between the high pressure and low pressure housings when the housings are assembled subsea.

Abstract: A casing hanger seal has facilities to enable periodic testing from the exterior of the wellhead housing. The casing hanger seal has inner and outer walls separated by a cavity. An energizing member moves downward to force the inner and outer walls into engagement with the casing hanger and bore of the wellhead housing. Test passages extend through the inner and outer walls, energizing member, and wellhead housing. The test passages divide the seal member into primary and secondary seal areas. Applications of test fluid, from the exterior, to the test passages determines whether a leak is present.

Abstract: A down-hole separator for a production well drilled in a producing formation has a first tube having a first end and a second end, the first end being adapted for connection to an end of a production tubing of the production well, an outer annular space being defined between the first tube and a casing string of the production well; a second tube, having a smaller diameter then the first tube, and being disposed within the first tube, an inner annular space being defined between the second tube and the first tube, the second tube having an inlet end and an outlet end, the outlet end being turned at an angle relative to a longitudinal axis of the second tube and communicating with the outer annular space, the inlet end passing sealingly through the second end of the first tube to communicate with the producing formation, the first tube having perforations at a point below the outlet end of the second tube to allow communication between the outer annular space and the inner annular space.

Abstract: The present invention provides a preperforated casing for a well bore and a method of installing a preperforated casing in a well bore. The inventive casing comprises (a) a conduit having a plurality of apertures extending through the wall thereof and (b) a liner fixed adjacent at least a portion of the interior surface of the conduit such that the liner is positioned adjacent the apertures and is operable for preventing fluid flow through the apertures. The liner is removable from the conduit by drilling. Additionally, the liner comprises a material which, upon drilling, will break up into pieces which can be readily circulated out of the well. The inventive method comprises the steps of running the inventive casing into a well bore and then drilling the liner such that the liner is broken up into pieces and the above-mentioned apertures are open for fluid flow.

Abstract: 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. The tool when attached to a string of tubing can be filled with cement slurry and downward motion used to anchor the well tool in a profile groove in an inflatable packer; to set the straddle packers above and below an access port on an inflatable packer; and then to open a valve to admit cement slurry to the inflatable packer. After filling the inflatable packer with cement slurry, an upward motion is used to close the valve, unset the straddle packers and release the anchor to move to another location where the operation can be repeated. At the conclusion of operations, a circulation valve is opened by pressure to reverse out cement slurry from the tubing string.

Abstract: A downhole or subterranean tool for use with a subsurface strata producing both hydrocarbon gas and water in which the gas and water are separated downhole by gravity and the gas is produced to the surface through one channel, and the water is disposed into a lower subterranean disposal zone. A production tubing is suspended within a casing which lines a well bore drilled through the two zones. A sucker rod actuated reciprocating pump is located in the production tubing. A seating nipple bypass tool with longitudinal holes and side ports in the wall thereof surrounds the pump. This bypass tool is positioned between the producing zone and a lower zone which is to be used as a disposal zone for the salt water. Gas is produced upwardly through the annulus between the tubing and the casing, and the salt water is flowed down through the longitudinal tubes in the sleeve to be disposed in the lower zone.

Abstract: A locking system utilizing metal seals for sealing and a rotary lock mandrel which is rotated to lock by a rotary running tool in a landing nipple in a well conduit. The lock mandrel has a metal sealing surface sealingly engageable with a metal seat in the landing nipple and orientors on a number of helically profiled segments which are rotatably engageable with mating profiled segments in the landing nipple. As the lock mandrel is lowered on the running tool into the landing nipple, lock mandrel segments are oriented between nipple segments, and the mandrel metal sealing surface engages the metal seat in the landing nipple. Downward jarring on the running tool rotates the mandrel segments into engagement with the landing nipple segments, locking the lock mandrel in the landing nipple, sealingly engaging the metal seal surface on the metal seat and releasing the running tool from the locking mandrel for retrieval from the well conduit.

Abstract: The present invention relates to an improved seal assembly for sealing between the interior sealing surface of a well housing and the exterior sealing surface of a hanger landed within the well housing and includes a seal body having a pair of outer lips diverging outwardly for sealing against the housing interior sealing surface and an interior series of annular ridges which have a diameter smaller than the outer diameter of the hanger exterior sealing surface, an upper energizer and a lower energizer for coacting with said lips to move the lips into sealing position and to store the energy of setting to ensure sealing engagement of the lips. In some forms of the invention the energy is stored by virture of the lips being of a relatively low yield stength material as compared to the energizers which have a higher yield strength. Also, structure is provided in some of the forms of the invention to store both radial and axial lip loading forces.