Well servicing methods using a hydraulic actuated workover mast

Patent · Tue Jul 12 00:00:00 EDT 1988

OSTI ID:6818568

Maroney, P F; Blalock, F C

A method is described of removing a stuck object from a well by operating a hydraulically operated workover rig which has a mast with a crown and a traveling block, a first winch with a brake, a first hydraulic motor, a line connected to the winch, and tubing in a well, which comprises: (a) connecting the end of the line to the tubing; (b) providing hydraulic power fluid to drive the first motor to drive the first winch to put high stress on the tubing; (c) abruptly cutting off the hydraulic power fluid to the motor to allow the tubing to contract; (d) then operating the brake to impart a shock down the tubing; (e) repeating steps (b) and (d) above as necessary until the object becomes unstuck. A method is also described of lowering objects into a well bore using a mast having a crown block, a first drum on which a line is mounted, a first hydraulic motor for driving the first drum.

• Assignee: Crane Carrier Co., Tulsa, OK
• Patent Number(s): US 4756366
• OSTI ID: 6818568
• Resource Relation: Patent File Date: Filed date 10 Mar 1987
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
MATERIALS
REMOVAL
MATERIALS HANDLING EQUIPMENT
NATURAL GAS WELLS
FAILURES
OIL WELLS
DESIGN
FLUID FLOW
HYDRAULIC EQUIPMENT
HYDRAULIC FLUIDS
HYDRAULICS
MATERIALS HANDLING
OPERATION
WELL SERVICING
EQUIPMENT
FLUID MECHANICS
FLUIDS
MECHANICS
WELLS
WORKING FLUIDS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing