Abstract: A first well tubing with a tubing retrievable safety valve having a bore of substantially the same size as the bore of the first well tubing. A second well tubing is connected to the first well tubing above the first well tubing and extends to the well surface and the second well tubing has a bore larger than the bore of the first well tubing. A landing nipple in the second well tubing has substantially the same size bore as the bore of the second well tubing. A wireline retrievable safety valve positioned in the interior of the landing nipple has a bore only slightly smaller than the bore of the first well tubing and thereby does not unduly restrict the flow of fluid through the well tubing.

Abstract: A subsurface well safety valve having a housing with a valve closure member which is controlled by a flow tube which includes an improved hydraulic actuating mechanism. The housing includes a cylinder with a straight portion and a curved portion which is adapted to receive hydraulic fluid from the surface and a piston is movable in the cylinder and connected to the flow tube for moving the flow tube to an open position. The piston includes a metal seal and a flexible portion connected to the top of the metal seal and the flexible portion is adapted to move through the curved portion of the cylinder. A valve and a valve seat are provided in the cylinder above the piston for sealing the hydraulic fluid from the well surface when the valve is open and for engaging and holding the flexible portion and the piston in the open position.

Abstract: An injection valve for use in a well conduit for injecting fluids into the conduit having a housing with a bore and a valve closure member in the bore moving between open and closed positions. A flow tube is telescopically movable in the housing for controlling the movement of the valve closure member and moves downwardly to open the valve closure member and is biased upwardly for closing the valve closure member. A variable, radially retractable choke is connected to the flow tube and extends into the bore for moving the flow tube downwardly in response to fluid injection, but contracts to allow passage of well tools through the valve. The flow tube may include a no-go shoulder and a releasable lockout may be provided between the flow tube and the housing.

Abstract: A tubular well tool receiving conduit for receiving a well tool having anchoring teeth in which a plurality of circular extending grooves on the inside on the conduit are provided for coacting with the anchoring teeth for supporting the well tool. Preferably the grooves match the tooth profile of the anchoring teeth and the grooves are concentric. For receiving a well packer, a second plurality of circularly extending grooves on the inside of the conduit coact with the expandible seal for providing multiple seal points with the packer seal. A no-go shoulder on the conduit positions the well tool in the conduit. In another embodiment, the circular grooves extend longitudinally a greater distance to engage the well tool anchoring means and seal and extend continuously along the inside diameter.

Abstract: A well safety valve having a piston and cylinder assembly which is connected to and actuated by a hydraulic control line extending to the well surface for moving the valve to an open position in which the hydrostatic head in the control line is balanced by a fluid column exposed to the opposite side of the assembly acting to close the valve. The fluid column has a greater density than the hydraulic fluid in the control line for biasing the valve to the closed position. The volume of fluid in the fluid column is greater than the volume of fluid in the control line whereby exposure of the fluid column to gas will not substantially change its density. The housing includes a container in communication between the other side of the assembly and the fluid column and contains a grease for protecting the assembly. The grease has a density less than the density of the fluid column and is of a volume greater than the volume displaced in the assembly upon actuation of the piston and cylinder.

Abstract: A hydraulically actuated well subsurface safety valve having a tubular member telescopically movable in the housing for controlling the movement of a flapper valve closure member in which a seal is telescopically movable in the housing and positioned in the path of travel of the lower end of the tubular member for sealing against the lower end of the tubular member. A spring urges the seal towards the tubular member for sealing when the valve is in the open position for limiting damaging fluid flow across the valve closure member.

Abstract: A well lock including a landing nipple having a locking notch and landing shoulder and a lock for setting in the nipple. The lock includes a body and at least one retractable no-go dog radially movable in the body and adapted to engage the landing shoulder and at least one locking dog radially movable in the body and adapted to lock in the locking notch. A rigid expander tube telescopically moves in the body between a running and a set position. In a running position the no-go locking dogs are cammed outwardly while the locking dogs are retracted. When the set position is reached the locking dogs are cammed outwardly and a recess is aligned with the no-go dogs for allowing them to retract. A seal is provided between the body and the expander tube for protecting the nipple from well fluid abrasion.

Abstract: A metal seal on a well tool for sealing between an inner tubular member and an outer tubular member including an annular metal ring positioned about the inner member having a pair of spaced lips on the outer periphery with a flowable metal insert positioned between the lips. Metal seals are provided on each side of the metal ring sealing between each side of the ring and the inner member. Fingers between the setting mechanism and the metal ring expand the metal ring outwardly upon movement of the setting mechanism. An expandable metal support is positioned on the outside of the setting mechanism adjacent the outer edge of the metal ring for supporting the ring as the ring is set. The setting mechanism includes a pair of expansion rings having coacting tapered faces for increasing the setting force as the temperature increases.

Abstract: A well tool, for setting in a nipple having a locking notch, including a body with initially retracted first and second locking dogs with a threaded actuator for moving the first and second dogs axially relative to each other and into engagement with the top and bottom of the locking notch for preventing axial movement of the body in the nipple. A plurality of metal cup sealing rings positioned about the body and expandable into a sealing relationship between the body and the nipple by a piston. A tapered expander extends into each of the sealing cups and at least one of the rings is positioned with the cups directed oppositely to the cup in another ring for holding pressure in both directions. The cup rings are shaped for setting in a sequential order starting with the rings furthest from the piston. A protector sleeve is releasably connected to the body and initially encloses the locking dogs and the sealing rings.

Abstract: A method and valve for stopping production of an oil and/or gas well by injecting a fluid from the outside of a well conduit into the well bore through a check safety valve. The valve, initially in the open position, is actuated to the closed position by an increase of the pressure outside of the conduit relative to the inside pressure. A communication path from the outside of the conduit to the inside of the conduit above the safety valve is opened by pressure in the conduit below the closed safety valve. Fluid is injected into the open communication path through the safety valve to kill well production while maintaining a safety check on the production fluid below the safety valve. The valve may be relatched to its initial open position and reactuated.

Abstract: A seat coacting with the flapper of a subsurface well safety valve which includes a solid metal annular seat and an annular flexible metal seal in a recess about the solid seat. The flexible seal has a base secured in the recess and a resilient sealing lip which is generally V-shaped in cross section with one end of one of the legs of the V being connected to the base and sealing against the side of the recess and the other leg extending downwardly beyond the solid seat for making contact with the flapper before the flapper seats on the solid seat. The solid seat and the sealing lip are directed downwardly at an angle with the angle of the sealing lip being greater than the angle of the solid seat.

Abstract: A subsurface solenoid well safety valve which is locked in the open position, after being opened mechanically, for preventing the valve from closing. A valve closure member is controlled by a tubular member which is mechanically moved downwardly to open the valve. An armature movable in the housing is actuated by a solenoid coil for locking the tubular member in the open position to the valve housing. Deenergization of the coil releases the armature and the lock and allows the tubular member to be biased to the open position.

Abstract: A temporary and retrievable protector sleeve for protecting a well landing nipple during working of the well. A landing nipple having a tubular body with a plurality of arcuate no go lugs circumferentially positioned. A body has a support for engaging the no go lugs on the interior of the nipple for supporting the body from the nipple. A releasable latch on the body releasably latches the body to the no go lugs. A spring engages the latch and yieldably urges the latch into a locking position. A sleeve section telescopically engages the body and the latch and retracts the latch and releases the body from the no go lugs when the section is moved relative to the body.

Abstract: A vertically positioned valve body having a valve seat positioned coaxially in the body in a horizontal plane. A valve element positioned upstream of the seat and axially movable in the body. The cross-sectional area of the valve element is approximately one-half of the cross-sectional area of the body around the valve element. A plurality of diametrically opposed piston and cylinder assemblies raise the valve element away from the valve seat and allow the valve element to seat by gravity and fluid flow. Guide means are provided between the valve element and the body for guiding the valve element. A sealing valve and seat are positioned upstream of the valve seat about each of the assemblies for sealing off the assemblies when the valve is closed.

Abstract: A method and apparatus for locking out a subsurface well safety valve in the open position in which the valve includes a housing having a bore and at least one downwardly directed shoulder adjacent the bore with a valve closure member in the bore moving between open and closed positions, and a flow tube telescopically movable in the housing for controlling the movement of the valve closure member. The method includes engaging the flow tube from the bore, moving the flow tube towards the open position, and from the inside of the bore making one or more outward indentations in the flow tube at a predetermined location whereby the indentations will engage a downwardly directed shoulder on the housing thereby preventing the flow tube from moving through the closed position. The indentations may be made around the outer circumference of the flow tube, circularly positioned, and at a predetermined distance from the top of the flow tube.

Abstract: A safety valve having a flow tube telescopically movable in the housing for controlling the opening and closing of the valve in which the housing has a fluid chamber with a piston connected to the flow tube and a fluid passageway connected to the chamber adapted to be in communication with the fluid pressure at the well surface. A valve element and valve seat in the passageway seals off fluid flow through the seat and holds the flow tube in the open position when pressure is applied to the fluid passageway. Spaced minimum leak seals may be provided to form the fluid chamber. An antiburst communication line may be provided between the chamber and the bore of the safety valve having a check valve for equalizing pressure in the chamber. A valve mechanism operable by the flow tube shuts off the flow of fluid in the passageway to the fluid chamber when the valve closure member is in the open position.

Abstract: A subsurface solenoid operated well safety valve which is locked in the open position, after being opened by the solenoid, for preventing the valve from closing by various forces overcoming the solenoid. A valve closure member in the bore of a housing moves between open and closed positions and is controlled by a tubular member which is biased in a direction to close the valve. An armature is movable in the housing and a solenoid coil is energized to move the armature. A first releasable lock connects the armature to the tubular member for allowing the movement of the solenoid to open the valve. The first lock is released when the valve is opened. A second releasable lock locks the tubular member to the housing in the open position prior to the release of the first lock means. The de-energization of the coil releases the armature and the second lock to allow the valve to close.

Abstract: A hydraulic actuated communication nipple for switching control fluid from one location to a second location in a well tool. A body having a longitudinal bore includes a control fluid passageway adapted to be connected to the well surface. A vertical moving sleeve in the body opens communication from the fluid passageway to the bore and is connected to a hydraulic piston in the fluid passageway which includes a bypass opening normally passing fluid through the passageway. A ball dropped down the control line seats on the piston, closes the fluid passage, moves the sleeve, and opens the fluid passageway to the bore. The piston also actuates a vertical moving plug to seal off the outlet with a metal-to-metal seal. A dual communication nipple may be provided which are internally connected by a line to move the fluid displaced by a piston.

Abstract: An injection valve for injecting chemicals into a well which is actuated by a piston having an upwardly and a downwardly directed metal cup seal with a resilient seal therebetween and a gas pressure charge above the piston acting to close the injection valve. Oil may be provided in the body between the gas charge and the piston for acting as a barrier. The gas charge may be placed in a closed gas container having a rupturable portion with a piercing means for opening the container. The container may include oil.

Abstract: A method of forming one end of a sidepocket mandrel into a tubular shape having an internal diameter large enough to receive an orienting sleeve, moving an orienting sleeve through the formed end, securing the sleeve to the mandrel, and reforming said end for reducing the internal diameter of the end sufficiently to form a premium female thread therein. The method of making an integrally formed sidepocket mandrel having a one-piece body with a main bore and an offset bore. Both ends are formed into tubular shapes while leaving a middle section unworked whereby the middle section forms a main bore and an offset bore. The tubular ends are reduced in size and shaped to form thickened walls which are aligned at the opposite ends of the main bore. During forming, one end, such as the bottom, is formed approximately sized for receiving thread, and the other end, preferably the top, is formed with an internal diameter sized to pass an orienting sleeve.