Abstract: An improved wellhead electrical connection assembly utilizing upper and lower retention mechanisms to minimize pressure and fluid leakage in the event of a tubing part or other failure. The upper retention mechanism ensures the connection assembly remains within a tubing hanger. The lower retention mechanism provides a secure connection to a downhole cable that can breakaway without damaging or dislodging other components of the assembly during an emergency event.

Abstract: A weldless adapter is mountable to a conductor casing for pressure testing seals or initial drilling at a well site. Slips engage the conductor casing to latch the weldless adapter onto the casing. Pressure injection ports are utilized to activate two seal rings against the conductor casing using positive sealing. A test port is utilized to test the seals of the two seal rings. The slips are activated by three sets of bolts.

Abstract: An improved wellhead electrical connection assembly utilizing upper and lower retention mechanisms to minimize pressure and fluid leakage in the event of a tubing part or other failure. The upper retention mechanism ensures the connection assembly remains within a tubing hanger. The lower retention mechanism provides a secure connection to a downhole cable that can breakaway without damaging or dislodging other components of the assembly during an emergency event.

Abstract: An adjustable blowout preventer may be configured to be adjustable, such that a central bore of the blowout preventer may be adjusted or repositioned. The blowout preventer may include one or more adjustment mechanisms for adjusting an angle of tilt of the central bore and/or an offset distance of the central bore. The adjustment mechanisms may be arranged between a stack of the blowout preventer and a wellhead. The adjustment mechanisms may generally be tubular structures having angled and/or laterally offset bores therein. The adjustment mechanisms may be configured to be rotatable, such that rotation of the mechanisms may change an angle of tilt and/or lateral offset of the blowout preventer central bore, or portions thereof.

Abstract: An assembly device between two sections of a double-skinned fuel pipe of an aircraft has a clamp for assembling the internal pipes, a coupling device for assembling the external pipes, a fitting extending between the ends of the external pipes of the first and second sections, with a shape complementary to the shape of an internal portion of the coupling device, and such that its section through any cutting plane perpendicular to the longitudinal axis common to the coupling device and the external pipes contains the smallest surface delimited by: a line corresponding to the intersection of the internal surface of the coupling device with this cutting plane and a straight line cutting said line at two points, this straight line being tangential to the orthogonal projection in this cutting plane, of the internal surface of the external pipes of the first or of the second section.

Abstract: A pressurized alkali dispersion supply system for use in permeabilizing a coal seam, and in particular for connecting together open zones in a coal seam using a (almost horizontal) linkage channel comprising a multitude of fine cracks. The system includes a source of alkali/alkali solution, a source of pressurized air, a supply pipe and a fogger for forming an alkali mist that is dispersed within the pressurized air. Cracks/fractures open up in the coal seam (ie. permeabilization) under the influence of the compressed air together with dissolution of humic acids by the alkali mist.

Abstract: A system, in certain embodiments, includes a subsurface safety valve (SSV) biased toward a closed position, and configured to open by application of hydraulic pressure. The system also includes a tubing hanger running tool (THRT), including a conduit in fluid communication with the SSV, and a pressure release valve fluidly coupled to the conduit. The pressure release valve is configured to maintain sufficient hydraulic pressure within the conduit to hold the SSV in an open position while the pressure release valve is in a closed position.

Abstract: In accordance with an exemplary embodiment, a tubing hanger having an angled auxiliary bore is provided. The auxiliary bore may receive a penetrator for a cabling system that powers a submersible pump. The auxiliary bore is angled with respect to the production bore of the tubing hanger. As a result, the penetrator exits the lower end of the tubing hanger at a location relatively close to the production tubing. This facilitates the use of a smaller-diameter production casing or casing hanger, in turn helping to reduce potential costs, for instance.

Abstract: A connector to secure a blow out preventer to a casing head of a well or wellhead or other tubing and a method of securing a blow out preventer to the well tubing utilizing the connector. The connector may be configured to secure the blow out preventer adapter to the well tubing and provide, within fifteen minutes, a seal operable to withstand ten thousand pounds per square inch of pressure. The connector may include both a hydraulically operated locking segment and a separate mechanical locking segment, and wherein both locking segments may be transitioned from a fully retracted position to a fully locked position within fifteen minutes. The connector may be configured to accommodate up to ten degrees of misalignment between the blow out preventer and the tubing.

Abstract: A change-out flange suited for use at an existing head casing of an oil or gas production well. The change-out flange is devised to replace standard hammer caps atop a well casing. By the present invention, with comparative ease a variety of wellhead equipment can be removably and interchangeably secured to the wellhead using an existing casing bowl or spool. The change-out flange has a casing hub that can be screwed unto a known casing bowl, and an integral connection flange provided with a plurality of connection holes arrayed in a manner consistent with the connection hole arrays of an assortment of conventional wellhead devices such as valves. A variety of well head devices thus can be more readily removed from, and securely replaced upon, the change-out flange. Lockdown pins are insertable into the change-out flange in a manner which secures the tubing hanger in place within the casing bowl.

Abstract: A tool for setting an annular seal, including an inner body, a first outer body coaxial with the longitudinal axis, and a second outer body coaxial with the longitudinal axis, wherein the second outer body is coupled to the first outer body. The inner body is configured to rotate about a longitudinal axis of the tool and is configure to bias a retaining ring, the first outer body is configured to couple to a potion of the mineral extraction system, and the second outer body is configured to move along the longitudinal axis to bias the annular seal.

Abstract: A system, in certain embodiments, includes a casing head and a tubing hanger disposed within the casing head and supported by a first retaining feature of the casing head. The tubing hanger is configured to support a tubing string. The system also includes a guide string hanger disposed within the casing head and supported by a second retaining feature of the casing head independent of the first retaining feature. The guide string hanger is configured to support a guide string.

Abstract: Methods and apparatus for diverting fluids either into or from a well are described. Some embodiments include a diverter conduit that is located in a bore of a tree. The invention relates especially but not exclusively to a diverter assembly connected to a wing branch of a tree. Some embodiments allow diversion of fluids out of a tree to a subsea processing apparatus followed by the return of at least some of these fluids to the tree for recovery. Alternative embodiments provide only one flowpath and do not include the return of any fluids to the tree. Some embodiments can be retro-fitted to existing trees, which can allow the performance of a new function without having to replacing the tree. Multiple diverter assembly embodiments are also described.

Abstract: A property of fluid within a well in a geological volume is controlled. The property of the fluid may include fluid density, pressure gradient, temperature, foaming characteristics, and/or other fluid properties within the well. In particular, the fluid property is controlled discretely within different sections (e.g., at different depths) of the well.

Abstract: The method of displacing fluids in the annulus between pressurized casing strings inside an active oil or gas well by providing a controlled turndown insert and guides then inserting and retrieving a flexible hose without it folding or buckling while being pushed or pulled through a wellhead system orifice with relatively sharp edges at the annulus opening where the hose must make a 90 degree turn from horizontal to vertical within a short radius without cutting, crimping or tearing the hose then seating and holding the hose while fluids are injected, all the while providing protection against well blow out or other pressure problems.

Abstract: A system for production of petroleum from an earth formation includes: an injection assembly disposable within a first borehole for injecting a first thermal source into the formation, the injection assembly including an injector extending from a distal end of the assembly; a production assembly disposable within a second borehole for recovering the petroleum from the formation, the production assembly including a production conduit and a collector extending from the distal end of the assembly; and a thermal injection conduit extending through at least a portion of the production conduit and the collector for regulating a thermal property of the petroleum.

Abstract: An apparatus for use in a wellbore is described, the apparatus having a tubular body and a throughbore which defines a primary fluid path through the apparatus. An expanding element is disposed around the tubular body and is configured to provide an annular barrier in a space between the tubular body and a surrounding wall. A conduit defining a secondary flow path through the apparatus is provided, and is configured to be in fluid communication with at least one alternate path, such as a shunt tube. The conduit is arranged to vary the secondary flow path along a longitudinal direction of the apparatus, for example to redirect the flow path to a radial position closer to the tool body. The conduit is configured to have a reduced effect on the operation of the expanding element, while still allowing the conduit to be coupled to alternate flow paths of adjacent apparatus.

Abstract: A Christmas tree is used between production tubing elevation and flow line elevation. The tree has a lower portion, an intermediate portion, and an upper portion. The intermediate portion is positioned between the production tubing elevation and the flow line elevation and has an axial dimension configured to substantially maintain the axial dimension between the elevations. The intermediate portion has first and second shut-off valves for closing fluid communication of the axial bore. A hanger is positioned in the axial bore of the intermediate portion between the first and second shut-off valves. The hanger defines a bore and a port. The port communicates a side of the hanger with the lower end of the hanger. The coil tubing attaches to the port at the lower end of the hanger, and the port at the side of the hanger communicates with the feed line of the intermediate portion.

Abstract: A methane gas wellhead, having: a body having a pair of side outlets and a top outlet; a mandrel dimensioned to be received into the top outlet; and a cover plate dimensioned to be received over the mandrel, and to hold the mandrel in the top outlet when the cover plate is secured to the top of the body; or a body having a pair of side outlets and a top outlet; and a mandrel dimensioned to be received into the top outlet, wherein the mandrel is a negative pressure mandrel, and wherein the top outlet and the mandrel are dimensioned to receive an O-ring seal therebetween.

Abstract: A movable arm 10 engages a flexible line 50 at a well site for positioning the flexible line between run-in position for passing the flexible line with a tubular through a well hole in the rig floor and a clamping position wherein the flexible line is adjacent the tubular above the rig floor for clamping the line to the tubular. The arm 10 extends upward from the rig floor 70, and includes a line guide, such as roller 12, for engaging the flexible line when in the run-in position. A powered drive 14 moves the arm between the run-in position and the clamping position. A spacer 82 may be used for positioning two or more flexible lines at a desired spacing relative to one another prior to positioning the lines within a clamp secured to the tubular. A slip bowl assembly 60 may be laterally movable so that slips do not engage the flexible line as it is run in the well.

Abstract: An outer tubing hanger is secured to an outer string of tubing and landed in a wellhead housing. A Christmas tree is connected to the wellhead housing. While in a first mode, an isolation tube extends between the tree and the outer tubing hanger for conveying well fluid flowing up the outer string of tubing. The isolation tube is removed while in a second mode, and an inner tubing hanger secured to an inner string of tubing lands in the outer tubing hanger production passage. An upper portion of the inner tubing hanger extends into sealing engagement with the tree production passage for flowing well fluid up the inner string of tubing while in the second mode.

Abstract: A subsea production system is disclosed. The subsea production system may comprise a well head, a tubing spool, a tubing hanger, an annulus, a production tree, and a bypass flow path.

Abstract: An apparatus for retaining two strings of tubulars characterized in that the apparatus comprises body parts of a device for retaining a single string of tubulars and a converting member. A device for retaining a string of tubulars, the device comprising at least one body part having a curved tapered surface upon which inserts are located for engagement with the string of tubulars characterised in that the curved tapered surface comprises a recess for the passage of cables.

Abstract: A manifold device connects in series between the wellhead and the outer casing of a well for providing access to the outer casing of the well without removing the wellhead. The device includes a tubular body for receiving the tubing string of the well therethrough. Plural access passages are formed in the tubular body to extend generally in the longitudinal direction of the body between an external end which is spaced radially from the hollow interior of the tubular body and an internal end converging in communication with the hollow interior at the bottom end of the manifold device. Well servicing tools can be inserted into the casing annulus defined between the outer casing and the tubing string of the well through one of the access passages formed in the tubular body of the manifold device.

Abstract: A method and apparatus for logging, controlling, or monitoring a subsea well or group of wells through a path not within production tubing. Preferred embodiments allow logging tools, wire rope, optic fibers, electrical cables, monitoring and measuring instruments and other items known to those skilled in the art of oil and gas production to be disposed into the well without interfering with the flow path through the production string. A further preferred embodiment includes the mooring or tethering of an instrument pod over the subsea well. The instrument pod is designed to provide on-board data storage, data processing, data receiving, and data transmission equipment, such that data from the well can be transmitted back to a receiving network where the data may be stored and processed into useful information for reservoir operators.

Abstract: A base plate assembly for supporting a number of tubular strings within a tubular housing comprises two base plate portions which when secured together are adapted to be supported on an upper end of the tubular housing. Each base plate portion comprises a top plate which includes an end face and a number of semicircular openings that extend from the end face. Thus, when the base plate portions are secured together, the semicircular openings align to form a number of circular bores which are each adapted to receive a corresponding tubular string. Also, the base plate portions may be disconnected and removed from the tubular housing after the tubular strings are secured in position.

Abstract: A method for drilling a plurality of well bores through a single conductor housing which comprises providing a base plate which includes at least first and second well slots that extend therethrough, supporting the base plate on the conductor housing, suspending a temporary casing string from the first well slot, drilling a first well bore through the second well slot, removing the temporary casing string from the first well slot, and then drilling a second well bore through the first well slot.

Abstract: This invention provides a tubing hanger system which isolates production tubing from a power cable, protects the cable from high pressure, and enables pressure testing of the production and cable seals. A tubing hanger member is seated in a tubing head to seal against a central bore, and a tubing head adapter is fastened above the tubing head. The tubing head adapter and the tubing hanger member form a tubing port and a cable port. A tubing seal-off nipple connects and seals the tubing port in each of the tubing head adapter and the tubing hanger member, and a cable seal-off nipple connects and seals the cable port in each of the tubing head adapter and the tubing hanger member. Seals are provided between the cable and cable port in the tubing hanger member, and between the cable and cable port in the tubing head adapter.

Abstract: An apparatus for use in a subsea well including a bore, wherein the apparatus has a tubing hanger body having an annulus therethrough, a ball valve in the annulus adapted for opening and closing the annulus, comprising a ball valve body within a valve chamber in the tubing hanger body which forms a continuation of the tubing hanger passageway at one end and is closed at its opposite end; a tubular valve housing for the ball valve; the ball valve body having a ball valve closure member substantially in the form of a spherical ball defining two annular valve seats concentric with the annulus for the ball valve; the spherical ball being longitudinally movable and rotatable extending transversely in alternating positions between spherical upstream and downstream valve seat preventing flow through the passage; and a remote source for hydraulically moving the spherical ball.

Abstract: A lifting top drive sub sea staging cement head in which cement slurry flows from outside into its central bore, thru a rotating swivel connection. The cement head has a rotatably indexable reservoir cylinder with multiple cells which may be loaded with balls, and/or darts, and/or staging bombs. One first cell is kept open for circulation. The cylinder is rotatably aligned, at will to the flow path, so that the staging elements may be washed down the drill string. In addition, the cement head is hydraulically remotely controlled such that no operators protrude from the smooth body, yet the remote system may be manually over-ridden.

Abstract: A preferably fiber optic line passes into a well interior through a pressure barrier such as a tree or wellhead housing, via a modified horizontal penetrator assembly. The penetrator assembly comprises double poppet valve assemblies arranged to open upon engagement of the penetrator with an interior well component such as a tubing hanger. Retraction of the penetrator closes the poppet valves, sealing the pressure barrier, severing the line and allowing the tubing hanger to be pulled. A replacement line is readily installed through the open poppet valve assemblies.

Abstract: A wellhead 10 for use with subterranean wells includes an improved tubing hanger 16 including an improved electric power cable pack-off port 20 that permits positioning an electric submersible pump (“ESP”) power cable 40 through the port 20 in the tubing hanger. The improved wellhead permits installation of packing 34 and compression rings 30, 32 within the power cable port 20 to create a vapor-tight pressure seal around the outer cable jacket 41. The seal may be rated at pressures of at least 750 psia. The wellhead 10 comprises a wellhead body 12 for supporting a tubing hanger 16, the tubing hanger including a tubing port 22 and a power cable port 20 for passing electrical power from an electrical power source 72 through the power cable port to the electric motor M. The wellhead 10 also includes a cable seal 34 within the power cable port, a lower packing seat 66, and a packing gland 24 selectively moveable with respect to the seat for compressing the cable seal 34 to form a pneumatic seal.

Abstract: A seal assembly for dual string coil tubing injection into a subterranean well includes a seal plate having first and second bores with annular seals for providing a high-pressure fluid seal around first and second coil tubing strings inserted through the respective bores. The seal plate is adapted to be connected directly to a wellhead, or a lubricator if a downhole tool is connected to either one, or both of the first and second coil tubing strings. The seal assembly further includes passages for supplying lubricant to the first and second annular seals to lubricate the respective seals while the respective first and second coil tubing strings are injected into and extracted from the wellhead.

Abstract: The present invention is a wellhead system for use in completing at least two well bores from within a single conductor housing. The wellhead system comprises at least one wellhead housing which is supported on the conductor housing and which comprises a top portion that is adapted to be connected to a lower portion of a wellhead component, a casing hanger which is supported within the wellhead housing and from which a casing string is suspended, and a connector for securing the wellhead component to the wellhead housing. In accordance with the present invention, the connector is selected from the group consisting of a latch ring and a segmented clamp assembly.

Abstract: A pipeline communication system. The system uses the pipeline and the adjacent ground and includes branches with junctions. Governor modules and transformers/rectifiers form part of the network. Monitors periodically provide information to the network controller. The system control receives information by way of an outstation to provide two-way communication and control using the pipeline and adjacent ground as conductors. Typically, the information in the form of fast frequency shift keying modulation is superimposed on the cathodic pipe protection system.

Abstract: A tubing hanger including a tubing hanger body having a tubing string which is adapted to be supported in the bore of the wellhead housing wherein the apparatus comprises a flapper valve disposed in or below the tubing hanger, wherein the valve further comprises a flapper valve having a flapper valve closure member substantially in the form of a concave spherical segment defining an annular valve seat concentric with the tubing for the flapper valve; a flapper plate disposed in the valve chamber for rotatable movement from a valve position in which the flapper plate is removed from the annular valve seat to a valve position in which the flapper plate extends transversely across the flow passage for the flapper valve and forms a sealing engagement with the annular valve seat and the sealing surface is substantially in the form of a convex spherical segment, wherein the convex spherical segment is disposed intermediate between the first and second planar surfaces.

Abstract: A seal assembly for dual string coil tubing injection into a subterranean well includes a seal plate having first and second bores with annular seals for providing a high-pressure fluid seal around first and second coil tubing strings inserted through the respective bores. The seal plate is adapted to be connected directly to a wellhead, or a lubricator if a downhole tool is connected to either one, or both of the first and second coil tubing strings. The seal assembly further includes passages for supplying lubricant to the first and second annular seals to lubricate the respective seals while the respective first and second coil tubing strings are injected into and extracted from the wellhead.

Abstract: A wellbore casing is formed simultaneously with the drilling out of the wellbore.

Abstract: A wellbore casing is formed simultaneously with the drilling out of the wellbore.

Abstract: A water-well-head adaptor has an adaptor body (1) with matching plate-fastener orifices (7, 8, 9, 10) and matching pump-element apertures (14, 16, 18, 20). The plate-fastener orifices match well-plate fastener orifices (12, 13) in a predetermined class of well-head plates (4) on an adaptor-bottom surface (2) and match pump fastener orifices (11) in a predetermined class of well pumps (6) on an adaptor-top surface (3). The pump-element apertures match plate orifices in a predetermined class of well-head plates on the adaptor-bottom side and match pump-element apertures in bottoms of a predetermined class of well pumps on the adaptor-top surface. The adaptor-bottom surface and the adaptor-top surface are juxtaposed a predetermined distance apart.

Abstract: A method of installing multiple strings within a wellbore. The method utilizes a carrier string having carrier string joints, a plurality of side strings each having side string joints, and a carrier tool for transferring the weight of the side strings to the carrier string permitting the side strings to be held, raised, and lowered within the wellbore by holding, raising, and lowering the carrier string. The carrier tool includes a body having a threaded through bore extending through the body and at least one threaded blind bore on the body. The method comprises the steps of engaging the carrier string joint into the carrier tool at the through bore so that the carrier string extends vertically upward and downward from the carrier tool, and engaging side string joints into the carrier tool at the at least one threaded blind bore.

Abstract: A transition for electrical well cable through the wellhead barrier of an underground well leads to an electrical power cable connected to an above-ground electrical power source, where the only connection between the electrical well cable and the electrical power cable is formed inside the wellhead barrier, between approved primary and secondary seals. A drain or vent to the atmosphere is also located between the seals.