Well tool

Patent · Tue Oct 08 04:00:00 EDT 1985

OSTI ID:5855263

Higgins, B D

Well tools for running and setting a well safety valve including a lock mandrel for releasably locking the valve at a no-go landing nipple in a well bore and a running tool for running and setting the lock mandrel. The lock mandrel includes a body provided with a no-go ring, locking dogs on the body, and an expander sleeve movable upwardly in the body for expanding and locking the dogs. The running tool includes a tubular core having an end engageable with an operating tube of the safety valve, an upper latch assembly for engaging the lock mandrel housing to couple the running tool with the lock mandrel, a lower latch assembly for operating the expander sleeve of the lock mandrel to expand the mandrel locking dogs, and a head for connecting the running tool in a wireline tool string. The running tool has locking features which apply a force from a spring of the safety valve to the upper latch assembly to lock the running tool with the lock mandrel. A safety valve is connected to the lock mandrel which is coupled with the running tool. The assembly is lowered in a well to a no-go landing nipple. A control fluid pressure to the safety valve relieves the valve spring force from the running tool core and the running tool is pulled upwardly expanding the lock mandrel dogs and releasing the running tool from the lock mandrel.

• Assignee: IFI; EDB-86-085054
• Patent Number(s): US 4545434
• OSTI ID: 5855263
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CONTROL
CONTROL EQUIPMENT
DESIGN
EQUIPMENT
FIELD PRODUCTION EQUIPMENT
FLOW REGULATORS
INSTALLATION
MATERIALS HANDLING EQUIPMENT
NATURAL GAS WELLS
OIL WELLS
OPERATION
PIPES
POSITIONING
PRESSURE CONTROL
SLEEVES
VALVES
WELL RECOVERY EQUIPMENT
WELLS