Release apparatus and method for threaded conductor pipe

Patent · Tue Jan 22 00:00:00 EST 1991

OSTI ID:5172535

Cromar, S A; Reilly, G T

This patent describes an apparatus for breaking out a subsea threaded connection within a string of pipe a connector joint; a profile formed in the interior of the connector joint; a torque tool; at least one dog mounted to the body; means for urging the dog radially outward; the dog having an axially extending side; the dog having an upward facing lifting surface. This patent also describes a method for breaking out a subsea connector joint within a string of pipe. It comprises forming a profile in the interior of the connector joint; providing a torque tool with at least one dog; lowering the torque tool; urging the dog radially outward; rotating the string of conduit; picking up the string of conduit; and applying torque to the string of conduit.

• Assignee: Vetco Gray Inc., Houston, TX (USA)
• Patent Number(s): US 4986359; A
• Application Number: PPN: US 7-509989
• OSTI ID: 5172535
• Resource Relation: Patent File Date: 16 Apr 1990
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
DRILL PIPES
INSTALLATION
MATERIALS HANDLING EQUIPMENT
DESIGN
NATURAL GAS WELLS
OFFSHORE PLATFORMS
OIL WELLS
PIPE JOINTS
THREADED JOINTS
DRILLING EQUIPMENT
EQUIPMENT
JOINTS
PIPES
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing