Abstract: High pressure gas lift valve with dual edge welded bellow subassembly where two bellows are incorporated in sealed configuration filled with silicone oil. Bellows are of different sizes featuring equal volumetric oil displacement for the pre-set total compression/expansion which corresponds to equal stem travel. By design both bellows can be fully compressed solid preventing bellows overstressing allowing extremely high pressure to be applied to both bellows. Lower bellow effective area is larger for orifice area than upper bellow area. This eliminates differential pressure across the bellows during valve opening resulting in equalized internal/external bellow stresses. Both bellows work only in compression from free length to full compression. This results in bellow internal/external pressure and stress level equalization and long cycle life. Valve withstands high injection pressure for well integrity testing.

Abstract: A tumbler ring apparatus, method, and system for deployment in a subterranean well at a setting location. The tumbler ring may have a generally oval shape with a major axis and a minor axis. The major axis defining a major diameter of the ring and the minor axis defining a minor diameter of the ring. The major diameter of the ring being larger than the inner diameter of the subterranean well at the setting location, and the minor diameter of the ring being smaller than the inner diameter of the subterranean well at the setting location. The ring is further configured to substantially deform to the inner circumference of the subterranean well at the setting location when tumbled by reducing the major diameter of the ring to cause the ring to generally take the shape of the inner circumference of the subterranean well.

Abstract: A valve arrangement for controlling the flow of an injection fluid from a well annulus into a hydrocarbon well, includes a valve body being insertable into a side pocket mandrel, an injection fluid valve for controlling the flow of the injection fluid through the valve arrangement and a bellows arrangement including a first pressure member, a second pressure member and at least one bellows element. A control line port is arranged in the valve body for fluid communication with a control line of the well and a control fluid chamber in fluid communication with the control line port comprises a hydraulic control fluid for biasing the injection fluid valve towards the open position.

Abstract: Apparatuses for restricting fluid flow through a well conduit comprise a tubular member having a seat member disposed within the tubular member for receiving a plug element. One or both of the seat member or the plug element comprise at least one shape-memory material to facilitate the plug element being able to land on the seat and/or to facilitate the plug element to pass through a seat member or other restriction in the tubular member either before or after landing on a seat.

Abstract: The invention relates to a valve device that is used in oil and gas wells. The valve device has an external housing (1), where at least one inlet (4) in the housing (1) is connected to an outlet (5) through a longitudinal bore in the housing longitudinal direction. Between the valve device's inlet and outlet there is mounted a valve seat (2) in the bore, where a valve body (3) shuts off the connection between the inlet and outlet. The valve body's position is controlled by a support (20), connected with a pressure-sensitive bellows device (6) comprising an upper and a lower bellows element (7, 71). When the lower bellows element is compressed in the valve device's axial direction, the compression will cause the two bellows elements'impact elements to be moved relative each other in order to lift the valve body out of abutment with the valve seat.

Abstract: Devices, systems and related methods control a flow of a fluid between a wellbore tubular and a formation using a flow control device having a flow space formed therein; and a flow control element positioned in flow space. The flow control element may be configured to flex between a first radial position and a second radial position to in response to a pressure differential along the flow space.

Abstract: The short mud saver, which can be used with top drive or rotary table drilling system is housed in a short sub, has a large axial bore for the passage of drilling mud therethrough, a fixed and a movable seal assembly. The movable seal assembly is urged into normally closed position by a stack of Belleville, wave or similar disc stack of springs. The force of the spring stack can be over-ridden by application of sufficient mud pressure from top drive or Kelly to move the moveable seal assembly. Upon application of sufficient mud pressure the movable seal assembly moves downward allowing for flow through the large axial bore. Upon closer of the mud saver a flexible washer associated with fixed seal assembly allows pressure below the mud saver to be relieved to the top of the mud saver, from where return is precluded unless the mud saver is re-opened by application of mud pressure from top drive or Kelly.

Abstract: A hydraulic connection mechanism for use in a wellbore comprises an upper connection tool, a lower connection tool configured to engage the upper connection tool and form a fluid communication pathway through the hydraulic connection mechanism, and a debris barrier disposed in the fluid communication pathway. The debris barrier comprises a body element, and a spring element configured to maintain the body element in a closed position when the upper connection tool is disengaged from the lower connection tool.

Abstract: The present invention relates to a device which can be used in an off-shore or onshore oil and/or gas well for the purpose of increasing the production of the well. The device comprises an outer structure in which a first and a second pressure-actuated bellows device are arranged, the first and second pressure-actuated bellows device, via a support means, being in fluid communication with each other. The support means is fixedly mounted internally in the outer structure, the support means thereby delimiting an open and a closed space for respectively the first and the second pressure-actuated bellows device, wherein the closed space is filled with a fluid under pressure, whilst the open space is in fluid communication with a surrounding fluid.

Abstract: The present invention relates to a valve device which is employed in connection with oil and gas wells with the object of increasing the well's production. The valve device comprises an external housing (1), where at least one inlet (4) in the external housing (1) is connected to an outlet (5) through a longitudinal bore in the housing's (1) longitudinal direction. Furthermore, between the valve device's inlet and outlet (4, 5) there is mounted a valve seat (2) in the bore, where a valve body (3) shuts off the connection between the inlet and the outlet (4, 5). The valve body's (3) position is controlled by a support (20), which support (20) is connected with a pressure-sensitive bellows device (6) comprising an upper and a lower bellows element (7, 71).

Abstract: A mud saver valve is constructed so that the valve seats self align preventing the loss of fluid when the valve is in the closed position. One or both seats can skew their longitudinal axes to get the alignment.

Abstract: A ball valve seat (10) is disclosed which provides a temporary seal for a plug (40). The valve seat comprises a substantially cylindrical body (30) of a first volume, which defines a seating surface (34). A pressure differential is developed across the valve seat when the plug sealingly engages the seating surface. The body is formed of an elastic material which compresses from a first volume to a smaller second volume by application of a force on the plug, to provide a clearance which is greater than a plugging dimension of the plug, thus allowing passage of the plug downstream. After passage of the plug, the body returns to the first volume.

Abstract: Apparatuses for restricting fluid flow through a well conduit comprise a housing having a longitudinal bore and a reusable seat disposed within the bore. The seat comprises a slidable element, a fixed element, a plug element support member, a seat inner diameter, and a return member to urge the slidable element toward the run-in position. The plug element support member has a retracted position when the seat is in the run-in position and an extended position when the seat is in the set position. A plug element adapted to be disposed into the bore and landed on the seat to restrict fluid flow through the bore and the well conduit is used to move the plug element support member from the retracted position to the extended position, thereby providing support to the plug element landed on the seat.

Abstract: Apparatuses for restricting fluid flow through a well conduit comprise a housing having a longitudinal bore and a seat disposed within the bore. The seat has a first position when the apparatus is in the run-in position and a second position when the apparatus is in the set position. The seat comprises an arcuate member comprising a plurality of slits defining a plurality of segment members having a gap there-between. Each of the gaps are variable such that movement of segment members inwardly causes the gaps to be narrowed or closed off completely when a plug element is disposed into the bore and landed on the arcuate member to move the arcuate member from the first position to the second position, causing restriction of fluid flow through the bore and the well conduit.

Abstract: An injection apparatus for injecting an activated fluid and an activated chemical fluid mixture into a well-bore is disclosed. Then, an injection method for injecting an activated fluid into a well-bore is also disclosed. A particular application to the oilfield industry, for example in cementing operation is encompassed. The apparatus and the method of use is fully automatic.

Abstract: Apparatuses for restricting fluid flow through a well conduit comprise a housing having a longitudinal bore and a collapsible seat disposed within the bore. The seat has a first position defining a first seat inner diameter when the apparatus is in the run-in position and a second position defining a second seat inner diameter when the apparatus is in the set position. The first seat inner diameter is greater than the second seat inner diameter. A plug element is adapted to be disposed into the bore and landed on the seat to move the seat from the first position to the second position. While in the second position, the seat restricts fluid flow through the bore and provides additional support to the plug member landed on the seat.

Abstract: An expandable injector pipe has openings and a cover sleeve preferably secured at opposed ends with offset openings. Expansion of the base pipe causes the cover sleeve to expand while keeping the openings in the cover sleeve misaligned with the openings in the base pipe. Pressure from within the base pipe flexes the resilient cover sleeve to allow fluid to exit through the cover sleeve. Upon removal of applied pressure, the cover sleeve moves back against the base pipe to cover the openings in the base pipe to prevent flow in the reverse direction.

Abstract: An aquifer recharge valve assembly comprises a valve movable along the interior of a pipe section to open and close aquifer recharge openings through the pipe section. The position of the valve controls the extent to which the recharge openings are available for delivery of recharge water into the aquifer. The valve may be a seamless resilient cylinder which expands due to well head pressure to assist in sealing the recharge openings when the valve is closed.

Abstract: A valve has a pair of surfaces, such as those of pipes, with an inflatable bladder disposed therebetween. Controlled inflation and deflation of the bladder provides for control of flow through the valve. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Abstract: The present invention generally relates to a flow-actuated valve for use in a wellbore. The invention includes a body having a closing member and a seat. The closing member and seat are separable to open and close the valve, thereby allowing the flow of fluid through the valve. The invention further includes a retainer to initially retain the valve in the open position absent a predetermined fluid flow rate in a first direction for a predetermined time period. A biasing member thereafter urges the valve to the closed position, absent another fluid flow rate in the first direction.

Abstract: A flow and pressure control valve for injecting a fluid into a well, or for pumping the fluid out of the well, includes an outer housing, a mandrel within the outer housing, and a pressure element attached to the mandrel. The pressure element can be pressurized to move radially inward to constrict a longitudinally extending flow passage in the valve between the mandrel and the outer housing. In addition, the mandrel includes annular orifices, and channel segments along the outside diameter thereof, which form tortuous and circumferential flow paths through the valve. The annular orifices and channel segments are constructed to provide a desired frictional head loss, and to control the pressure and flow rate of the injected fluid to prevent cavitation and cascading. Pressurization of the pressure element can also be controlled to vary the tortuous flow path through the flow passage, or to seal the flow passage.

Abstract: Apparatus is provided which reliably and conveniently controls fluid flow through a sidewall of a tubular string. In a described embodiment, an auto-fill sub includes a check valve disposed in a housing. The check valve includes a generally tubular flexible member for sealingly engaging a sidewall of the housing to prevent fluid flow through an opening formed through the sidewall. A flow deflector may be provided to prevent abrasive wear, flow cutting and extrusion of the flexible member. Other features may include a lockout sleeve and a piston for displacing the lockout sleeve relative to the housing.

Abstract: The present invention provides improved casing filling and circulating apparatus for running a casing string into a well bore using a drilling rig casing elevator and related equipment. The casing filling and circulating apparatus includes a flow passage therethrough and a check valve disposed within the flow passage for preventing spillage and for preventing fluid back-flow through the apparatus when the casing string is being lowered into a well bore. Additionally, the filling and circulating apparatus includes a pressure relief seal means which relieves pressure from the casing prior to when the filling and circulating apparatus is disconnected therefrom by back-flow through the apparatus thereby preventing spillage of fluid. Methods of using the casing filling and circulating apparatus are also provided.

Abstract: A safety sub is disclosed for retaining drilling fluid in the kelly or equivalent and other components of the mud system located above the drill string when pressure drops in the drill string, such as when the circulation pump is turned off in adding a new joint to the drill string. The safety sub includes a pressurized elastomeric cartridge with an elastomeric closure having an asymmetrical wall thickness, preferably achieved by the removal of a chord of material from its external circumference. When internal drilling pressure drops, the external pre-charge pressure closes the elastomeric material by inwardly collapsing the thinner wall portion of the closure. The metallic end pieces of the cartridge are bonded to the elastomeric material during the molding process.

Abstract: A well test string includes an annulus pressure responsive tester valve and a tubing conveyed perforating gun including a tubing pressure actuated time delay firing mechanism. A compression set packer is disposed in the test string between the tester valve and the perforating gun. The packer includes a bypass valve for communicating the well below the packer with the tubing bore. The bypass valve is operably associated with the packer so that the bypass valve is open prior to setting the packer and so that the bypass valve is closed as the packer is set. The compression set packer also includes a one-way equalizer valve for allowing one-way fluid flow from the well below the packer to the tubing bore. The equalizer valve is operably associated with a bypass valve so that the equalizer valve is inoperable when the bypass valve is open, and so that the equalizer valve is operable when the bypass valve is closed.

Abstract: A flexible subsurface well safety valve for installation in the interior of a coiled tubing. A coiled tubing member is connected in a coiled tubing and a safety valve, which is flexible for allowing bending about its longitudinal axis, is positioned in the bore of the tubular member. The valve has sufficient flexibility to coil around a coiled tubing reel. The safety valve includes a housing with a hydraulic piston and cylinder assembly coaxially positioned above the housing and a biasing spring coaxially positioned above the housing and connected to the hydraulic means.

Abstract: The invention is a water well surge block for agitation of particles in water wells. The surge block utilizes a novel one way valve comprising a shaft in connection with a rigid perforated cylinder having an upper and lower surface and a flexible membrane that overlies the upper surface of the membrane. As the surge block moves downward in the well or wellbore the membrane flexes away from said cylinder during downward movement of the block in order to permit the one way flow of fluid upward. The membrane closes against the cylinder to prevent the flow of water as the block moves upward.

Abstract: The disclosure relates to an improved diaphragm type mud saver valve, commonly referred to as a Kelley valve, which closes automatically to prevent loss and spilling of drilling mud. The improved valve can withstand very high drilling and pump pulsation pressures, for example, the pressures required for drilling wells over 20,000 feet in depth and mud pressures can exceed 15,000 p.s.i. The disclosure prevents the formation of gas pockets by providing gas escape openings and a clearance space between the support and backup element to prevent the extrusion of the diaphragm material through the small openings in a backup sleeve thus extending the life of the diaphragm and allowing proper diaphragm seating.

Abstract: The invention relates to valves for wells.The overflow valve of a drill string comprises a hollow body (1) with side ports (2), a seat (4) which is part of the inner surface of the body (1), a shut-off element which is in fact an elastic sleeve (3) fitted with its one end in the body (1) and positioned therein with a gap (6). An effuser (7) is provided at the other end of the sleeve (3). Elimination of movable parts and units, increasing tightness of closing the passage for fluid to flow, decreasing hydraulic resistance of the overflow valve to the flow minimize wear and failure of the components and enhances operating reliability and durability of the valve.

Abstract: A mud saver valve for automatically closing to prevent loss and spilling of drilling mud. The valve contains a diaphragm, rigid backup means and diaphragm support means so that the valve can be used in high pressure wells.

Abstract: A pressure limiter for use with a positive displacement pump and an inflatable packer. The pressure limiter includes an outer housing with an inner mandrel disposed therein. Slidably disposed between the mandrel and housing is a generally annular piston. A spring biases the piston toward a closed position. Packer pressure acts upwardly on the piston tending to move it to an open position in which pump discharge pressure is relieved to a well annulus. A check valve prevents premature relief of pressure of the packer. Once the piston is in an open position, packer pressure will maintain it in the open position until pressure is relieved from the packer.

Abstract: An automatic fill-up floating apparatus usable in a float collar or a float shoe in a casing string. The apparatus includes a housing having a back check valve positioned therein. A spring biases the valve toward a closed position. A filling body is disposed across an opening at a lower end of the housing and includes a flow passage therethrough. The filling body is shearably pinned to a valve stem extending from the valve and has a holding position in which the valve is held in an open position. A resilient washer is annularly positioned around the valve stem and above the filling body. The washer is free to move upwardly in response to upward movement of flow through the flow passage in the filling body as the casing string is lowered into a well. The floating apparatus may be tripped by pumping fluid downwardly through the casing strings such that the washer is forced against the filling body, sealingly covering the flow passage therethrough.

Abstract: Methods and apparatus for the recovery of petroleum origin hydrocarbons from ground water tables at sites of refineries, oil and gasoline storage and distributing facilities, and the like. Pursuant to the invention, separate liquid handling devices, each in the nature of a vessel or canister and having liquid trapping and ejecting facilities that are free of mechanical pumping action, are employed for raising the ground water and liquid hydrocarbons that accumulate on the ground water table, respectively, through which the well or wells extend, and under the static pressure of the compressed air.

Abstract: Methods and apparatus for the recovery of petroleum origin hydrocarbons from ground water tables at sites of refineries, oil and gasoline storage and distributing facilities, and the like. Pursuant to the invention, separate liquid handling devices, each in the nature of a vessel or canister and having liquid trapping and ejecting facilities, are employed in a well or wells at the site for separately raising the ground water and liquid hydrocarbons that accumulate on the ground water table, respectively, through which the well or wells extend, under the static pressure of compressed air and free of mechanical pumping action on the liquids.

Abstract: A formation protection valve is normally held in an open position relative to an annular elastomeric valve seat by an inserted wash pipe during performance of a gravel packing operation in a subterranean well. Upon removal of the wash pipe, a valve head swings downwardly to a sealing position on an annular elastomeric valve seat. A valve seat support structure is mounted below the annular valve seat to provide support of the inner periphery of the annular valve seat against downward fluid pressure forces exerted on the valve head. The elastomeric valve seat is shearable by a subsequently inserted tubing string, which also effects the displacement of the valve seat support structure to a radially outwardly disposed position wherein it no longer interferes with the passage of the tubing string therethrough.

Abstract: A method of mixing fluids in a well bore employing a tubing string with a mixing valve disposed thereon. The well bore is sealed below the mixing valve, a first fluid then being pumped down the tubing string and a second fluid being pumped down the well bore annulus. By varying pressures and through the optional use of a circulating valve in conjunction with the mixing valve, the fluids may be mixed in the well bore or in the tubing string.

Abstract: A landing nipple having a port through the wall thereof which is controlled by a valve carried by a non-circular ring which ring may be moved toward circular position by introduction of a sleeve-like member into the bore through the ring to unseat the valve.

Abstract: A mixing valve for use in cementing, fracturing or other treatment of a well. The valve, which may be mounted in a pipe string, comprises a center mandrel surrounded by a coaxial housing having circumferentially spaced apertures therethrough. A packer cup surrounds the center mandrel below the apertures in the housing, and seals the annulus between the mandrel and housing when the pressure of fluid through the bore of the mandrel exceeds that on the outside of the chamber. When mixing fluids, it is only necessary to pressure the fluid outside the housing to collapse the packer cup against the mandrel, the fluid from the outside then entering the stream flowing from the mandrel bore. A method of mixing fluids utilizing the valve of the present invention is also disclosed.

Abstract: An improved check valve assembly for use in a well bore comprising an outer annular housing, sliding mandrel slidably disposed within the bore of the outer annular housing, check valve seal means retained on the exterior of the outer annular housing and shear means disposed within the outer annular housing having a portion engaging the sliding mandrel and the outer annular housing.

Abstract: A blowout preventer assembly for sealing off a well blowout within the confines of the drill stem is disclosed. The blowout preventer assembly comprises an elongated collar member which is located around and is slidable along a section of the drill pipe. Each end of the collar member has an expandable portion made of rubber or the like, which is capable of being expanded to the width of the drill pipe casing. Fixedly attached to the section of drill pipe at a location above the slidable collar member is a rigid metal collar section having around its circumference a plurality of equally-spaced wing flanges tapering down from a right angle at the top of the fixed collar to a slope at the lower end thereof.

Abstract: An improved bypass valve for use with an oil well testing string is disclosed which includes a check valve means for allowing fluid flow from the interior of the test string to the well annulus when the interior pressure exceeds the well annulus pressure. The bypass valve further includes a blocking means which blocks interior communication with the check valve means when the well annulus pressure exceeds the string interior pressure. A delay means is included which delays the action of the blocking means for a predetermined length of time. The improved bypass valve is intended for use in a testing string for an oil well, and is to be placed in the testing string below a normally closed tester valve and above a seal assembly for insertion into sealing engagement with a preset production type packer. The time delay allows the seal assembly to be removed from the packer after the packer location is determined without activating the blocking means to move to its locked closed position.

Abstract: Apparatus is disclosed wherein a tubular body connectible in a drill string and having a float valve arranged therein to normally close the string, as the string is lowered into a well bore, is provided with a plurality of ports connecting its bore above the float valve with its exterior, and valve means for movement from a position normally closing to a position opening the ports when the exterior fluid pressure exceeds the fluid pressure in the bore above the float valve by a predetermined amount.