Apparatus for stabbing and threading a drill pipe safety valve
This patent describes an apparatus for threading a valve into a well pipe, the valve being adapted for operative movement between an open and closed position for controlling the flow of fluid therethrough, the valve and the well pipe having a threaded portion with a similar thread pitch. It comprises a frame; a clamp assembly coupled to the frame and adapted for coupling with the well pipe; a carriage coupled to the frame and adapted for horizontal linear movement relative to the frame, the carriage being linearly moveable between first and second horizontal positions; a body coupled to the carriage and adapted for vertical, linear movement relative to the carriage, the body being movable between first and second vertical positions; the valve being coupled to the body and adapted for horizontal and vertical linear movement with the body and rotation relative to the body, the valve being vertically and horizontal positions respectively, and horizontally aligned with and vertically coupled to the well pipe in the second vertical and horizontal positions respectively; first drive means for urging the carriage between the first and second horizontal positions; second drive means for coordinating rotation and vertical displacement of the valve, the drive means being operative to thread the valve into a plurality of drill pipe thread pitches.
- Assignee:
- Master Metalizing and Machining Inc., Tyler, TX (United States)
- Patent Number(s):
- A; US 5092399
- Application Number:
- PPN: US 7-519893
- OSTI ID:
- 5356448
- Country of Publication:
- United States
- Language:
- English
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