Joseph R Priest

US Patent:

46138498, Sep 23, 1986

Filed:

Apr 23, 1984

Appl. No.:

6/603258

Inventors:

Roger Smith - Georgetown TX
Joseph R. Priest - Austin TX
Faustyn C. Langowski - Georgetown TX
Harry D. Hebard - Round Rock TX

Assignee:

Hughes Tool Company - Houston TX

International Classification:

G08B 2100

US Classification:

340679

Abstract:

An interference warning device for an oil well drilling rig having a derrick, traveling equipment, a racker arm, and a block retractor. Fluid activated sensors provide electric signals when the traveling equipment is within a selected vertical distance from the racker arm, when the racker arm is within a selected horizontal distance from the vertical axis of the derrick, or when the block retractor has extended the traveling equipment to within a selected distance from the fully extended position. The operator is informed when any one of the sensors is activated, cautioned when any two of the sensors are activated, and warned when all three sensors are activated. The drawworks may be braked when all three sensors are activated.

US Patent:

44627335, Jul 31, 1984

Filed:

Apr 23, 1982

Appl. No.:

6/371144

Inventors:

Faustyn C. Langowski - Georgetown TX
Joe R. Berry - Round Rock TX
Joseph R. Priest - Austin TX

Assignee:

Hughes Tool Company - Houston TX

International Classification:

E21B 1914

US Classification:

414 22

Abstract:

A pipe racking system is shown of the type having a vertical track, a lifting assembly adapted for vertical movement along the track, a horizontal beam for supporting the vertical track, and a movable carriage connecting the vertical track to the horizontal beam. The lifting assembly is supported by a wire rope running from the lifting assembly inside the vertical track and outside the carriage to a source of lifting power. A fixed guide sheave mounted in the carriage serves as a first point of contact for the wire rope running from the lifting head to the carriage. A rotatable guide sheave mounted in the carriage serves as a second point of contact for the wire rope. The rotatable guide sheave is rotatable by the wire rope in response to movement of the carriage, vertical track, and horizontal beam to center the wire rope in the guide wheel grooves of the guide sheaves during racking operations.