Abstract: A tubing hanger is provided for suspending a tubing hanger from a wellhead housing. The tubing hanger body includes a production bore and an annulus bore, a valve opening inlet port, a valve closed inlet port, and a hydraulically operated ball valve to selectively open and close the annulus bore. An actuator sleeve surrounds the ball valve and is movable in response to fluid pressure between the open and closed positions.

Abstract: A tubing hanger positioned within the bore of a wellhead body has a vertical bore from which a tubing string may be suspended within a well bore. When the hanger is landed, a fluid passageway in the tubing hanger has one end in fluid communication with a passageway in the wellhead body and its other end connected to a pressure responsive downhole function. The poppet valve mounted in the passageway is urged closed, and when opened permits fluid pressure from a source to be supplied to the function.

Abstract: A slip spool for selectively supporting or snubbing a tubing string suspended in a wellbore can be mounted to a wellhead. The slip spool has an axial passage to be aligned with the wellbore and at least two radial passages extending through a side wall of the slip spool and communicating with the axial passage. At least two slip blocks are slidably supported within the respective radial passages. The slip spool further includes actuators for moving the respective slip blocks between an extended position in which they engage a component in the tubing string that provides a weight-bearing shoulder, and a retracted position in which the slip blocks clear the axial passage of the slip spool. The slip spool facilitates live well service operations and eliminates scoring of an exterior surface of the tubing.

Abstract: A flow completion system for controlling the flow of fluid from a well bore, the flow completion system comprising a tubing spool, a tubing hanger supporting a tubing string which extends into the well bore and defines a tubing annulus surrounding the tubing string; a first closure member which is positioned in the production bore above the production passageway; a first annular seal wherein the first closure member and the first seal comprise a first pressure-containing barrier between the well bore and a surrounding environment; a second closure member which is positioned in the production bore above the first closure member; and a second annular seal wherein the second closure member and the second seal comprise a second pressure-containing barrier between the well bore and the environment; and wherein both the first and the second barriers are associated with the tubing hanger.

Abstract: A method and assembly for recovering production fluids from a well having a tree, using a conduit which is inserted into a production bore to divert the recovered fluids via chemical treatment, pumping or any other apparatus with minimal reduction in the rate of recovery of the production fluids.

Abstract: A gate valve for a component which includes an elongated body and a flow passage extending generally longitudinally through the body, the flow passage including a generally lateral first branch connected to a generally longitudinal second branch. The gate valve comprises a gate which is moveable generally longitudinally across the first branch between an open position in which a hole in the gate is aligned with the first branch and a closed position in which the hole is offset from the first branch; a conduit which extends through the body from the gate; an actuating mechanism positioned in the conduit for moving the gate from a first position to a second position; and a return biasing mechanism for moving the gate from the second position to the first position; wherein one of the first and second positions corresponds to the open position of the gate and the other position corresponds to the closed position of the gate; and wherein the conduit extends generally longitudinally through the body.

Abstract: A flow completion system for controlling the flow of fluid from a well bore, the flow completion system comprising a tubing spool which includes a central bore that extends axially therethrough and a production outlet which communicates with the central bore; a tubing hanger which is supported in the central bore and which includes a production bore that extends axially therethrough and a production passageway that communicates between the production bore and the production outlet, the tubing hanger supporting a tubing string which extends into the well bore and defines a tubing annulus surrounding the tubing string; a first closure member which is positioned in the production bore above the production passageway; a first annular seal which is positioned between the tubing hanger and the central bore above the production passageway; wherein the first closure member and the first seal comprise a first pressure-containing barrier between the well bore and a surrounding environment; a second closure member which

Abstract: A christmas tree to control the production from a subsea oil or gas well is disclosed. The christmas tree design including a tree body having a first flow port and a tree cap; a tubing hanger landed within the tree body; an actuation mandrel landed within the tree body, the actuation mandrel having a flow port; and a flow diverter disposed within the tree cap to divert flow through the flow port. The christmas tree arrangement allows for dual barriers within the tree cap without placing or retrieving any plugs from within the tubing hanger, thereby reducing the number of downhole trips required to complete and/or service the subsea well.

Abstract: A wellhead has, instead of a conventional Christmas tree, a spool tree (34) in which a tubing hanger (54) is landed at a predetermined angular orientation. As the tubing string can be pulled without disturbing the tree, many advantages follow, including access to the production casing hanger (21) for monitoring production casing annulus pressure, and the introduction of larger tools into the well hole without breaching the integrity of the well.

Abstract: A device and method for delivering fracture fluid (e.g., erosive materials) into an oilfield wellbore while the well has wireline, coiled tubing, jointed tubing or any other apparatus encumbering the flow path of the erosive fluid that is being injected into the device. The device provides the ability to insert and remove equipment in the wellbore during fluid treatment while maintaining access to the full wellbore diameter. The invention also provides a method for delivery and positive, down-hole displacement of material (i.e., diverting material including, but not limited to buoyant ball sealers).

Abstract: A gate valve for a component which includes an elongated body and a flow passage extending generally longitudinally through the body, the flow passage including a generally lateral first branch connected to a generally longitudinal second branch. The gate valve comprises a gate which is moveable generally longitudinally across the first branch between an open position in which a hole in the gate is aligned with the first branch and a closed position in which the hole is offset from the first branch; a conduit which extends through the body from the gate; an actuating mechanism positioned in the conduit for moving the gate from a first position to a second position; and a return biasing mechanism for moving the gate from the second position to the first position; wherein one of the first and second positions corresponds to the open position of the gate and the other position corresponds to the closed position of the gate; and wherein the conduit extends generally longitudinally through the body.

Abstract: A flow completion system for controlling the flow of fluid from a well bore, the flow completion system comprising a tubing spool which includes a central bore that extends axially therethrough and a production outlet which communicates with the central bore; a tubing hanger which is supported in the central bore and which includes a production bore that extends axially therethrough and a production passageway that communicates between the production bore and the production outlet, the tubing hanger supporting a tubing string which extends into the well bore and defines a tubing annulus surrounding the tubing string; a first closure member which is positioned in the production bore above the production passageway; a first annular seal which is positioned between the tubing hanger and the central bore above the production passageway; wherein the first closure member and the first seal comprise a first pressure-containing barrier between the well bore and a surrounding environment; a second closure member which

Abstract: A gate valve for a component which includes an elongated body and a flow passage extending generally longitudinally through the body, the flow passage including a generally lateral first branch connected to a generally longitudinal second branch. The gate valve comprises a gate which is moveable generally longitudinally across the first branch between an open position in which a hole in the gate is aligned with the first branch and a closed position in which the hole is offset from the first branch; a conduit which extends through the body from the gate; an actuating mechanism positioned in the conduit for moving the gate from a first position to a second position; and a return biasing mechanism for moving the gate from the second position to the first position; wherein one of the first and second positions corresponds to the open position of the gate and the other position corresponds to the closed position of the gate; and wherein the conduit extends generally longitudinally through the body.

Abstract: A tubing hanger for a flow completion system which comprises a Christmas tree connected above a wellhead housing that includes a central bore in which the tubing hanger is supported, the tubing hanger comprising a generally annular body; a production bore which extends generally axially through the body; an annulus bore which extends generally axially through the body; the annulus bore comprising a generally lateral first branch which is connected to a generally axial second branch; and a closure member which includes a gate that is moveable generally axially across the first branch between an open position in which a hole in the gate is aligned with the first branch and a closed position in which the hole is offset from the first branch.

Abstract: A tubing hanger and wellhead have features for controlling and monitoring fluid pressure to downhole equipment. The tubing hanger has an internal vertical passage. A hydraulic line connects to the lower end of the vertical passage and runs downhole. The vertical passage communicates with a lateral passage through the outer wall of the hanger. A lateral passage through the wellhead housing is generally aligned with the lateral passage of the hanger when the hanger is installed in the wellhead housing. A pressure shaft is installed in the wellhead passage and has a passage therethrough. A seal member having spherical ends is inserted between spherical receptacles located on the inner end of the pressure shaft passage and on the outer end of the lateral passage of the hanger. The seal member has an internal passage having a flared inner end. The seal member is allowed to rotate to sealingly connect the lateral passages if some misalignment of the lateral passages exists.

Abstract: A tubing hanger incorporates a flow control valve that is ordinarily found in a horizontal christmas tree. A branch passage forming a production fluid outlet has a mouth that intersects with a vertical production bore. A valve closure element in the form of a rotatable sleeve or saddle is disposed in the bore for co-operation with a seat disposed in the branch passage. Rotation of the sleeve, e.g. by a shaft extending through a crown plug, brings a hole into or out of alignment with the seat to control production fluid flow. In other embodiments, the sleeve is axially movable.

Abstract: It is described a downhole subsurface safety valve device (8;80), where an actuator (30; 30′; 50; 50′) is mounted on the outside of the well, i.e. on the Christmas tree (20; 40). The valve (8;80) is operated by means of mechanical transmission (12; 52) which may be linear (hydraulic actuator) or rotary (electric motor).

Abstract: A subsea well apparatus has features for controlling and monitoring production fluid flow from a well. A Christmas tree lands on a subsea wellhead, the tree having a tubular, open upper end. A first flow passage extends from a lower end of the tree to the upper end for communicating fluid with the well. A second flow passage extends downward from the upper end of the tree and has an outlet on a sidewall of the tree for communicating with a flowline. A production module lands on and is retrievable from the upper end of the tree, the module having a flow loop with one end in communication with the first flow passage and another end in communication with the second flow passage. At least one flow interface device is located in the loop of the production module. The flow interface device may be used to monitor or control the flow and may be a temperature or pressure sensor, a flow or multi-phase flow meter, or a choke.

Abstract: A wellhead assembly comprises a central bore through the wellhead assembly having a pressure boundary region. A port is provided in the wellhead assembly having an opening in the central bore in the pressure boundary region of the wellhead assembly. The port preferably extends through the high pressure housing into the bore of the wellhead assembly. A first casing string is secured at a first end within the wellhead assembly below the opening of the port in the central bore of the wellhead assembly. A second casing string is secured at a first end within the wellhead assembly above the opening of the port in the central bore of the wellhead assembly. A fluid flowpath is thereby formed comprising the port in the wellhead assembly and an annulus between the first and second casing strings. In this way, access is provided to an annulus within the well.

Abstract: A tubing hanger to facilitate production tubing annulus access including a tubing hanger body having a central bore, a shuttle valve slidably mounted to the tubing hanger body, and at least one annulus access bore through the tubing hanger permitting fluid communication between the central bore and an annulus defined between a production tubing string and a wellbore or casing via the tubing hanger body and the shuttle valve. The shuttle valve may be slidingly movable between an open and a closed position. The tubing hanger may further include a groove enclosed by a filler, the groove providing communication between a plurality of small annulus access bores and a large annulus access bore.

Abstract: A subterranean oil or gas well apparatus is provided. The apparatus includes a single-bore production tubing hanger arranged concentric with a wellhead. The tubing hanger includes a plurality of ports and channels arranged about the tubing hanger to give operators access to the production tubing annulus and provide chemical injection capability. The ports are closable by a sliding valve. The apparatus also includes annulus and production radial-bore stab assemblies between a christmas tree and an internal crossover assembly. The stab assemblies are extendable and retractable between the chirstmas tree and the crossover assembly to allow the retrieval and installation of each independently.

Abstract: A controls bridge for a flow completion system which comprises a tubing spool having a production outlet, a tubing hanger having a production bore that communicates with the production outlet and at least one service and control conduit extending therethrough, and at least one external service and control line that terminates near the tubing spool, the controls bridge comprising a first body portion; a mechanism for securing the first body portion to the top of the tubing spool and/or the tubing hanger; at least one first coupling member which is adapted to engage a second coupling member that is mounted in the service and control conduit; at least one third coupling member which is adapted to engage a fourth coupling member that is connected to the external service and control line; a bridge line which is connected between the first coupling member and the third coupling member; a first actuator for moving the first coupling member into engagement with the second coupling member; and a second actuator for mo

Abstract: A well completion system having a spool tree body defining a vertical bore extending therethrough. The vertical bore defines an annular recess adjacent to the lateral production fluid outlet port in the spool tree body. A tubing hanger is connected to the spool tree body. The tubing hanger defines a vertical production bore extending therethrough and has at least a lateral production fluid flow port. The tubing hanger is positioned within the vertical bore such that the lateral production fluid flow port in the tubing hanger is in flow communication with the lateral production fluid outlet port in the spool tree body. There is a removable plug that seals the vertical production bore extending through the tubing hanger above the lateral production fluid outlet port in the spool tree body. A stopper means seals the vertical bore extending through the spool tree body above the removable plug.