Release apparatus and method for threaded conductor pipe

Patent · Tue Jan 22 04:00:00 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): A; US 4986359
• Application Number: PPN: US 7-509989
• OSTI ID: 5172535
• Country of Publication: United States
• Language: English

Related Subjects

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