Marvin Dennis Jones

US Patent:

44887035, Dec 18, 1984

Filed:

Feb 18, 1983

Appl. No.:

6/467596

Inventors:

Marvin R. Jones - Houston TX

International Classification:

F16K 3314

US Classification:

251 77

Abstract:

There is disclosed a blowout preventer having rams which are moved between opened and closed positions by means of operating systems having axially reciprocable rods releasably connected to the rams for relative axial movement with respect thereto. The connections between the rams and rods fixedly support the rams against tilting, during repair or replacement, regardless of the relative axial position of the rods and rams.

US Patent:

49551957, Sep 11, 1990

Filed:

Dec 20, 1988

Appl. No.:

7/287180

Inventors:

Marvin R. Jones - Houston TX
Joseph L. LeMoine - Brookshire TX

Assignee:

Stewart & Stevenson Services, Inc. - Houston TX

International Classification:

F16D 3102

US Classification:

60405

Abstract:

A fluid control circuit and method of operating equipment such as a blowout preventer having a two-way hydraulic piston and cylinder assembly. The circuit includes various features such as a dual pressure level independently controlled fluid supply, a dedicated secondary fluid supply reserved for supplemental use, a dedicated fluid supply reserved for exclusive use in one operating branch, automatic sensor for applying a reserve fluid supply on a sensed demand, a pressure intensifier for increasing available operating force, and control circuitry for preventing loss of enhanced secondary operating energy into a primary circuit.

US Patent:

45195714, May 28, 1985

Filed:

Sep 14, 1984

Appl. No.:

6/650572

Inventors:

Marvin R. Jones - Houston TX
Roland M. Howard - Houston TX

Assignee:

Koomey Blowout Preventers, Inc. - Houston TX

International Classification:

E21B 3306

US Classification:

251 1A

Abstract:

There is disclosed a blowout preventer having rams each of which is moved between opened and closed positions by a fluid-operated actuator having a rod adapted to be axially reciprocated by piston means within a cylinder and extending from the cylinder for connection to the ram, means for locking the rams in closed position including locking elements carried by the rod for movement into locking position within the cylinder automatically in response to movement of the ram with the rod into closed position.

US Patent:

46554319, Apr 7, 1987

Filed:

Nov 13, 1985

Appl. No.:

6/798135

Inventors:

Paul E. Helfer - Houston TX
Marvin R. Jones - Houston TX

International Classification:

E21B 3306

US Classification:

251 13

Abstract:

An improved blowout preventer having a body with a central bore and aligned opposed passages extending out from the central bore, a ram assembly in each of the passsages and including a ram body with a face seal, a rear slot, a first passage through the body from above the face seal into the slot, a second passage through said body from below the face seal into the slot, a pressure responsive actuator, a connector extending from the actuator to the ram body and having a disc end positioned in and movable axially in said slot to close and open flow through said ram body passages, a third passage through said ram body from above said face seal to the rear of the ram body, a fourth passage through said ram body from below said face seal to the rear of the ram body and means coacting with said third and fourth passages to allow fluid flow to the rear of said ram body and to prevent fluid flow to the front of said ram body.

US Patent:

42654246, May 5, 1981

Filed:

Feb 1, 1979

Appl. No.:

6/008249

Inventors:

Marvin R. Jones - Houston TX

Assignee:

Cameron Iron Works, Inc. - Houston TX

International Classification:

E21B 3306

US Classification:

251 1A

Abstract:

A blowout preventer having a housing with a bore extending therethrough and guideways intersecting the bore, a ram in each of the guideways, a packer in the face of each of the rams, a recess between the back of each packer and the face of the ram into which the packer can expand to partially reduce the sealing pressure on the packers and at least one passage communicating from the bore below the guideways to the recess to transmit well pressure to the recess.

US Patent:

46389725, Jan 27, 1987

Filed:

Jul 18, 1985

Appl. No.:

6/756187

Inventors:

Marvin R. Jones - Houston TX
Paul E. Helfer - Houston TX

Assignee:

Koomey - Houston TX

International Classification:

E21B 3306

US Classification:

251 13

Abstract:

There is disclosed a blowout preventer used in the drilling and completion of oil and gas wells and having rams which are moved within chambers in a housing which intersect a bore therethrough between positions opening and closing the bore. The zones of the bore above and below the closed rams are respectively connected by first and second passageway means with the outer side of the rams, with one of the passageway means extending through each ram. Each ram is moved by operating means which includes a rod having a lost motion therewith and a packing assembly on its inner end which sealably engages an end surface of the ram which surrounds the opening of the one passageway means to the chamber, as the rod moves inwardly to close the rams, and disengages therefrom, as the rod moves outwardly to open the rams.

US Patent:

45315809, Jul 30, 1985

Filed:

Jul 7, 1983

Appl. No.:

6/511752

Inventors:

Marvin R. Jones - Houston TX

Assignee:

Cameron Iron Works, Inc. - Houston TX

International Classification:

E21B 3306

US Classification:

166 84

Abstract:

An improved rotating blowout preventer having a sealing assembly which is latched in place in a body with an upper latch engaging the non rotating body and lower latch engaging in a groove to engage the rotating portion, a sealing assembly having an improved elongate flexible tubular sealing element for sealing against a rotating Kelly or other element and being sufficient long and resilient to seal under conditions of lateral misalignment without interfering with the rotation and an improved support system which maintains a predetermined bearing load and transfers excess loads to the body.

US Patent:

40578879, Nov 15, 1977

Filed:

Jan 2, 1976

Appl. No.:

5/646247

Inventors:

Marvin R. Jones - Houston TX
Paul E. Helfer - Houston TX

Assignee:

Cameron Iron Works, Inc. - Houston TX

International Classification:

B25B 1700

US Classification:

29240

Abstract:

Apparatus for disconnecting the lower threaded end of an upper section from the upper threaded end of a lower section of pipe string extending through the bore of an underwater wellhead.