Raymond Kent Lamb

42098912, Jul 1, 1980

Jul 17, 1978

5/925515

Raymond K. Lamb - Houston TX
Richard E. Weathers - Houston TX
Lacey C. Coffey - Houston TX
Stephen J. Walker - Houston TX

NL Industries, Inc. - New York NY

E21B 4301
E21B 33035

29466

Apparatus for positioning a first part with respect to a second part is characterized by a cylindrical guide respectively attachable to each part, a helical surface being disposed on each guide, each helical surface including a right hand half and a left hand half. A piston-cylinder is disposed on the second part, the piston being extendable to engage the guide on the first part to axially align the guides. After alignment, the piston is retractable to bring the helical surfaces into contact to generate a torque and align the parts. In another embodiment, the guide for the second part is formed on the piston while the guide on the first part has an axial alignment member projecting therefrom to engage the guide on the second part to align the guides. Once aligned, the helical surfaces contact each other with the piston extended. The contact between the helical surfaces causes the rotational alignment of the second part with respect to the first part.

41596374, Jul 3, 1979

Dec 5, 1977

5/857159

Raymond K. Lamb - Houston TX
Stephen J. Walker - Houston TX

Baylor College of Medicine - Houston TX

G01M 328

73 46

A test tool and a method of testing is disclosed for testing for leaks in apparatus having a bore and a landing surface, such as blowout preventers, wellheads, casing hangers, and the like. The test tool is connected to pipe having a passage therethrough, which has a landing surface for landing on the landing surface of the bore, bypass passages automatically closed on landing and during testing, packing means for effecting a seal in the bore, a pressure relief valve and hydraulic passages communicating with the passage in the pipe, the packing means, and the relief valve which opens at a predetermined pressure. The packing is set either hydraulically, mechanically or by a combination thereof. The packing is set hydraulically by a piston and cylinder which are activated by hydraulic setting pressure in the passages and then hydraulic test pressure is released by the relief valve to the space above the packing for testing the apparatus. When the test tool is set mechanically, the packing is compressed by the weight of the test tool and the pipe into sealing position by downward movement of a portion of the body after landing, the hydraulic testing pressure then assisting and maintaining the seal.