Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7931079 | Tubing hanger and method of compensating pressure differential between a tubing hanger and an external well volume A tubing hanger and method for reducing loads and stresses on sealing boundaries in a tubing hanger is provided. The tubing hanger has an inner cavity that is sealed with respect to an external well volume present in for example the surrounding tree architecture and... | 04/26/2011 |
| 7357185 | Subsea tubing hanger assembly for an oil or gas well A subsea tubing hanger assembly is disclosed which comprises a tubing hanger (12) having a plurality of conduits (14). A pup joint (16) is connected to the hanger (12) and a shroud (20) surrounds the pup joint (16). A plural... | 04/15/2008 |
| 7308943 | Well operations system A wellhead has, instead of a conventional Christmas tree, a spool tree in which a tubing hanger 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 producti... | 12/18/2007 |
| 7296629 | Subsea completion system, and methods of using same A subsea production system that is adapted to be coupled to a subsea wellhead and includes a tubing hanger adapted to be positioned in the wellhead. The tubing hanger has a flow opening extending therethrough and has at least one eccentrically located opening extend... | 11/20/2007 |
| 7114571 | Device for installation and flow test of subsea completions A running string for a subsea completion comprises an upper section (70) which may be a coiled tubing (CT) injector unit as shown, or a wireline lubricator (FIG. 8). A lower section (60) provides wireline/CT access to production/annulu... | 10/03/2006 |
| 7032665 | System and method for gravel packaging a well Systems and methods for gravel packing which provide a mechanism for a gravel slurry to bypass bridges which may form in the well intervals being packed. In one embodiment, a plurality of short, independent bypass flow paths are provided along the length of a well s... | 04/25/2006 |
| 6964306 | Manifold device and method of use for accessing a casing annulus of a well 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. ... | 11/15/2005 |
| 6942028 | Slim-bore tubing hanger A subsea wellhead assembly has a wellhead housing at the upper end of the well. The wellhead housing supports one or more strings of casing, each having a casing hanger. A tubing spool connects to the upper end of the wellhead housing. The tubing spool has a landing... | 09/13/2005 |
| 6615915 | High pressure side-by-side wellhead system 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 ... | 09/09/2003 |
| 6530433 | Wellhead with ESP cable pack-off for low pressure applications 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 ... | 03/11/2003 |
| 6513588 | Downhole apparatus Expandable tubing (20) has a tubing wall (22) comprising a plurality of deformable tubular structures (24). The structures (24) have permeable walls and containing a filter medium (28) such that fluid may flow through the structures (24) and the filter me... | 02/04/2003 |
| 6082460 | Apparatus and method for controlling hydraulic control fluid circuitry for a tubing hanger Wellhead completion apparatus includes a wellhead member (11) having an upper supporting shoulder (24) and a lower landing shoulder (26). A running tool (30) is releasably connected to a tubing hanger (36) for lowering and landing the tubing hanger (36) o... | 07/04/2000 |
| 5992893 | Connector There are disclosed two embodiments of a connector for sealably connecting the lower ends of an upper riser member and an upper conduit on the lower ends of an upper riser pipe and upper auxiliary line joint, respectively, to the upper ends of a lower ris... | 11/30/1999 |
| 5992527 | Wellhead assembly A wellhead assembly in which an in-line tree (10) is landed within a wellhead housing (3). The in-line tree has a vertical production through bore (11), two hydraulically or electrically controllably in-line valves (13A, 13B) in the vertical production bo... | 11/30/1999 |
| 5775420 | Dual string assembly for gas wells A dual completion for gas wells includes a dual base with a primary hanger incorporated in the base. Primary and secondary coiled tubing strings extend through the base at a downwardly converging angle of 2° or less. The dual base is mounted on an annula... | 07/07/1998 |
| 5732772 | Dual split tubing hanger A split tubing hanger for a well has two semi-cylindrical tubing hanger bodies. A seal has a ring portion which seals the tubing hanger bodies to the bore of a tubing head. The seal also has a diametrical band portion which joins the ring portion. The ban... | 03/31/1998 |
| 4252187 | Bearing-equipped well tool Well tools which must be rotated after landing are equipped with an antifriction bearing in such fashion that the tool is supported through the bearing initially and then supported via solid metal-to-metal contact which bypasses the bearing.... | 02/24/1981 |
| 4214778 | Holddown mechanism for a tubing hanger in a wellhead A mechanism for releasably holding down a tubing hanger received within a hanger bowl of a wellhead. Pins mounted for axial sliding movement in horizontal passages of the hanger bowl are forced inwardly by screws which are threaded into passages of the we... | 07/29/1980 |
