Abstract: A wellhead assembly is provided having a first tubular member, and a second tubular member at least partially extending over a first end of the first tubular member defining an annular space there between. An arcuate lock member such as a lock ring is located within the annular space. At least one load applying member penetrates the second tubular member and urges the arcuate lock member against the first tubular member. A lock nut is coupled to an inner surface of the second tubular member. A method for coupling the first tubular member to the second tubular member is also provided.

Abstract: A stuffing box support assembly is configured to be positioned between a production pumping tree and a stuffing box of a wellhead. In use, the support assembly functions like a joint between the wellhead production tree and the stuffing box. The support assembly is configured such that it could tilt or move laterally to maintain a coaxial relationship between the stuffing box and a polished rod extending therethrough. This alignment between the stuffing box and the polished rod reduces wear and tear of the stuffing box packing.

Abstract: The present invention relates to a tubing rotator assembly for attachment to an existing casing head for purposes of suspending and rotating a tubing string in an oil well. In the preferred embodiment, the tubing assembly includes a rotation surface, such as a bearing, in which a tubing mandrel rests and allows one to rotate the tubing manually above the wellhead. It provides a low profile reducing the distance between the casing head and the pumping tee, which may eliminate the need for one to raise the pumping unit to fit on the rotator. In addition, the conventional seals above the rotation surface have less chance of leaking fluids located between the casing and tubing due to the seals potentially installed in the present invention. In addition, if the conventional seals do start to leak, then one can change the packing rubber without having to remove the tubing rotator assembly or tubing string (thus, not requiring a rig to change the sealing elements).

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 protector for placement over subsea wellheads. A main body is cylindrical, with an inner diameter of sufficiant size to fit over a subsea wellhead. One end of the main body has a cap across it. A vent and a pump-through port, which permits pumping in of corrosion inhibitors, is in the cap. The open end of the main body has an outwardly flaring skirt to help guide the protector into place over the wellhead. The main body is formed from polyurethane via molding or other suitable methods.

Abstract: A flow completion apparatus comprises a wellhead housing installed at an upper end of a well bore and a tubing spool connected over the wellhead housing. The tubing spool includes a central bore extending axially therethrough, a production outlet communicating with the central bore and an annulus passageway communicating with the tubing annulus. A tubing hanger is supported in the central bore and includes a production bore extending axially therethrough and a production passageway communicating between the production bore and the production outlet. An annular seal is positioned between the tubing hanger and the central bore above the production passageway, and the tubing spool comprises a workover passageway extending between the annulus passageway and a portion of the central bore located above the seal. Furthermore, the tubing hanger comprises an annulus bore extending between the workover passageway and the top of the tubing hanger.

Abstract: A water well filter device and a method for preventing airborne microorganisms from entering into a water well are disclosed. The water well filter device of the present invention contains a microorganism filter element having sufficiently small pore sizes to stop microorganisms from passing through. The water well filter device can further contain a pre-filter, a vacuum relief valve, or both. The method for preventing airborne microorganisms from entering into a water well involves connecting the water well filter device of the present invention to an opening of the well that is otherwise sealed from open air.

Abstract: A coil tubing hanger system and a method of installing such system is provided. The coil tubing hanger system comprises a body having an axial opening there through. A slip bowl having a base and housing a slip that can be retained in a first position spaced apart from bowl base and a second position proximate the bowl base is fitted within the opening. The slip has inner teeth. Tubing is fitted within the slip and through the bowl while the slip is retained in the first position. The slip is then allowed to drop to the second position such that the slip teeth bite onto the outer surface of the tubing.

Abstract: The invention provides a connector head, such a casing head for using in a well bore, for connecting an inner tubular body, such as a casing pipe within an outer, concentric tubular body, such as a conductor pipe, and for transferring at least a portion of the load from the inner tubular body onto the outer tubular body.

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 well capping apparatus for capping a generally vertically positioned well pipe includes a body that provides an upper surface and side wall portions as well as a lower surface portion that includes a downwardly facing socket that generally conforms to the upper end portion of the well pipe at the well head and protectively covers it. The body includes an annular portion that encircles the upper end portion of the well pipe and preferably contacting the outer cylindrically shaped surface of the upper end portion of the well pipe. A central cavity is provided within the body having a water conveying function through the body. A pair of larger diameter apertures are provided on the body, each communicating with the central cavity at spaced apart positions on the body. A plurality of smaller diameter apertures are on the body, each communicating with the central cavity.

Abstract: An ROV, wireline or diver installed subsea xmas tree debris cap has an integral corrosion inhibitor/biocide provided in the form of a solid block which is wrapped in a water soluble membrane bag. The block is suspended inside the debris cap in a basket or perforated container. After installation of the debris cap, the membrane and solid block will dissolve and sanitize the stagnant water, thereby protecting all materials from corrosion for a number of years. The debris cap also includes an environmental seal in the form of a single O ring. Furthermore, the debris cap is simplified in that it does not include a conventional debris cap-to-xmas tree lockdown mechanism.

Abstract: A retaining apparatus, in particular an internal tree cap, for use in a wellhead is disclosed, the wellhead having a central bore and first and second retaining means, such as a shoulder and a groove, within the bore of the wellhead. The retaining apparatus has a housing for location within the bore of the wellhead. A first engagement assembly is provided for engaging with the first retaining means in the bore of the wellhead to thereby retain the housing within the bore of the wellhead. A second engagement assembly for engaging with the second retaining means in the bore of the wellhead is also provided. The apparatus further comprises a preload assembly operable when the housing is located within the bore of the wellhead to apply a preload to the housing between the first and second retaining means. A method for retaining an assembly within a wellhead bore, in which a preload is applied between the first and second retaining means, is also disclosed.

Abstract: A subsea Christmas tree coupling having a radially outer connection, for example a tree surface and a conductor housing, adapted to make a rigid joint with a conductor casing. A radially inner connection, for example a depending skirt of the subsea Christmas tree, is adapted to make a sealed joint directly with a casing hanger assembly of a mudline suspension system. The invention thus substantially eliminates the use of additional hangers besides those of the mudline suspension system, simplifying the coupling assembly, and providing the possibility of reduced stackup heights. The relatively compact and simple coupling results in shorter installation times and lower costs. The rigid joint between the coupling and the conductor casing ensures that any external loading is transferred to the conductor casing.

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 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.

Abstract: A coiled tubing hanger assembly for supporting coiled tubing in a well including, as a first element, a mechanically-assisted slip assembly characterized by multiple slip segments inserted in a tapered slip bowl located in the midsection of a coiled tubing head. The conical slips are constrained to move in concert in the tapered throat of the tubing head midsection by means of a slip retainer ring and rest on a rack cylinder slidably positioned in the bore of the midsection beneath the slips. The rack cylinder is typically fitted with lands and grooves that engage a pinion gear attached to a slip-operating mechanism to facilitate manually raising and lowering the rack cylinder and the slips together, causing the slip teeth to selectively engage and disengage the segment of coiled tubing extending through the slips and the bore of the rack cylinder, into the well.

Abstract: An improved vent hood for abandoned oil and gas wells which is made of concrete and reinforced with linear and coiled rebar to withstand substantial overburden. The invention can be fabricated in either a two-section conical or cylindrical embodiment. Either of the two-section embodiments allow the base member to be positioned around the abandoned well casing and thereafter filled with gravel. A concrete lid having an aperture is thereafter placed upon the base section with a gas sealant disposed between the mating surfaces of lid and base sections. A vent pipe is thereafter inserted into the aperture to permit gas collected within the vent hood to flow to surface.