| Patent application number | Description | Published |
|---|
| 20080257540 | Multipart frac head with replaceable components - A multipart frac head with replaceable components permits the frac head to be refurbished in the field. In one embodiment, a bottom leg of the multipart frac head is replaceable. In another embodiment, inlet ports of the frac head are also replaceable. | 10-23-2008 |
| 20090008100 | Fixed-point packoff element with primary seal test capability - A fixed-point packoff element for a full-bore pressure isolation tool supports a primary seal and a test seal to permit the primary seal to be tested by injecting test fluid through a side port of a tubing head spool before the pressure isolation tool is rigged up for a well stimulation procedure. | 01-08-2009 |
| 20090038791 | CUP TOOL WITH THREE-PART PACKOFF FOR A HIGH PRESSURE MANDREL - A cup tool for use with a high-pressure mandrel of a wellhead isolation tool has a three-part packoff assembly that slides over a cup tool tube from an unset position to a set position. The three-part packoff assembly includes an elastomeric cup, a rigid alignment ring located above the elastomeric cup and an elastomeric packoff element located above the rigid alignment ring. The rigid alignment ring helps ensure that the elastomeric cup remains correctly aligned in a casing or tubing that is not straight, is out of round or is washed, and helps ensure that the elastomeric packoff achieves a high-pressure seal in the set position, even under adverse downhole conditions. | 02-12-2009 |
| 20090091131 | HIGH-PRESSURE THREADED UNION WITH METAL-TO-METAL SEAL, AND METAL RING GASKET FOR SAME - A metal ring gasket provides a high-pressure temperature tolerant metal-to-metal seal between subcomponents of a threaded union. The metal ring gasket is received in an annular cavity formed between mating surfaces of the subcomponents of the threaded union. The metal ring gasket is capable of maintaining a fluid seal even at very high temperatures resulting from direct exposure to fire. At high fluid pressures the metal ring gasket is energized because hoop stress induced by the fluid pressure forces the metal ring gasket into tighter contact with the subcomponents of the threaded union. | 04-09-2009 |
| 20090114870 | TWO-PART BACK CAP FOR A PLUG VALVE AND PLUG VALVES INCORPORATING SAME - A two-part back cap for a plug valve includes a back cap seal body and a back cap retainer nut. The back cap retainer nut secures the back cap seal body within the plug valve and securely supports the back cap seal body. A gap between an outer periphery of the back cap retainer nut and the back cap seal body permits the back cap seal body to flex and expand with a plug valve body of the plug valve. This ensures that the back cap seals are not stressed and a longer service life results. | 05-07-2009 |
| 20090145593 | Snubber Spool With Detachable Base Plates - A snubber spool with detachable base plates includes a base flange with a plurality of spaced-apart load pins received in through bores in the base plates. Tie plates with bores for receiving top ends of the load pins are mounted over the base plates in an offset orientation with respect to the base plates. A load nut that engages a pin thread on an outer sidewall of the snubber spool is tightened down on the tie plates to lock the base plates to the snubber spool. | 06-11-2009 |
| 20100001219 | TWO-PART BACK CAP FOR A PLUG VALVE AND PLUG VALVES INCORPORATING SAME - A two-part back cap for a plug valve includes a back cap seal body and a back cap retainer nut. The back cap retainer nut secures the back cap seal body within the plug valve and securely supports the back cap seal body. A gap between an outer periphery of the back cap retainer nut and the back cap seal body permits the back cap seal body to flex and expand with a plug valve body of the plug valve. This ensures that the back cap seals are not stressed and a longer service life results. | 01-07-2010 |
| 20100096852 | HIGH-PRESSURE THREADED UNION WITH METAL-TO-METAL SEAL, AND METAL RING GASKET FOR SAME - A metal ring gasket provides a high-pressure temperature tolerant metal-to-metal seal between subcomponents of a threaded union. The metal ring gasket is received in an annular cavity formed between mating surfaces of the subcomponents of the threaded union. The metal ring gasket is capable of maintaining a fluid seal even at very high temperatures resulting from direct exposure to fire. At high fluid pressures the metal ring gasket is energized because hoop stress induced by the fluid pressure forces the metal ring gasket into tighter contact with the subcomponents of the threaded union. | 04-22-2010 |
| 20100171060 | TWO-PART BACK CAP FOR A PLUG VALVE AND PLUG VALVES INCORPORATING SAME - A two-part back cap for a plug valve includes a back cap seal body and a back cap retainer nut. The back cap retainer nut secures the back cap seal body within the plug valve and securely supports the back cap seal body. A gap between an outer periphery of the back cap retainer nut and the back cap seal body permits the back cap seal body to flex and expand with a plug valve body of the plug valve. This ensures that the back cap seals are not stressed and a longer service life results. | 07-08-2010 |
| 20110048698 | MULTIPART FRAC HEAD WITH REPLACEABLE COMPONENTS - A multipart frac head with removable components permits the frac head to be refurbished in the field. A bottom leg and inlet ports of the multipart frac head can be replaced. | 03-03-2011 |
