Well tool lock mandrel and handling tools therefor

Patent · Tue May 24 00:00:00 EDT 1988

OSTI ID:7134078

Higgins, B D

A lock mandrel and running tool assembly for setting and locking a well tool in a landing nipple along a well bore is described comprising: a lock mandrel having a body provided with at least one side window; a support shoulder on the body for supporting the mandrel in a no-go landing nipple; a radially movable locking dog in the side window; a longitudinally movable expander sleeve in the body movable within the dog for expanding and locking the dog outwardly and releasing the dog for inward movement, the expander sleeve having an internal annular recess for engagement by a handling tool to move the sleeve upwardly and downwardly and an external annular latch boss along an upper end portion thereof; and a latch ring in the body around the expander sleeve above the locking dog for engagement with the latch boss on the sleeve when the sleeve is at an upper locking position to releasably hold the sleeve in the upper position. The running tool includes a head assembly for connection with an operating tool string; an upper retainer dog assembly supported from the head assembly for releasably coupling the running tool with the body of the lock mandrel; a lower locking lug assembly supported from the head assembly for releasably coupling the running tool with the expander sleeve of the lock mandrel to move the expander sleeve between locking and release positions.

• Assignee: Otis Engineering Corp., Dallas, TX
• Patent Number(s): US 4745974
• OSTI ID: 7134078
• Resource Relation: Patent File Date: Filed date 22 Dec 1986
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
MATERIALS HANDLING EQUIPMENT
NATURAL GAS WELLS
TOOLS
OIL WELLS
DRILL PIPES
FASTENERS
FIELD PRODUCTION EQUIPMENT
MATERIALS HANDLING
SLEEVES
SUPPORTS
DRILLING EQUIPMENT
EQUIPMENT
MECHANICAL STRUCTURES
PIPES
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing