Brake system for drilling equipment
AssigneeGregory Rig Service & Sales, Inc.
InventorTruman L. Gregory
Life of this patent
Estimating the term…
Abstract
A brake system for controlling a winch cable for an oil well drilling or servicing operation includes a main external contracting band brake for stopping the cable and an auxiliary disk brake for controlling the speed the cable unwinds from the winch so as to control the descent of a load on the cable.
Claims22
A brake system for controlling a load suspended from a cable on a winch adapted for use in an oil well operation, comprising,
- a friction brake for stopping the cable, and
- a disc brake having a pressure regulated caliper that constantly engages a disc to substantially control the rate of descent of the load when said load is being lowered, said disc brake adapted to be used independent of said friction brake for maintaining a substantially controlled constant speed that the cable unwinds from the winch.
A brake system adapted for controlling a load suspended from a cable on a winch for an oil well operation, comprising
- an external contracting band brake for stopping the cable,
- a disc brake having a pressure regulated caliper that constantly engages a disk to substantially control the rate of descent of the load when said load is being lowered, said disc brake adapted to be used independent of said friction brake for maintaining a substantially controlled constant speed that the cable unwinds from the winch,
- a remote control valve for applying the disc brake to control the speed that the cable unwinds from the winch, and
- a shaft for connecting said band brake with said disc brake.
A brake system for controlling a load suspended from a cable on a winch, comprising
- an external contracting band brake for stopping the load,
- a disk brake having a caliper that constantly engages a disc to substantially control the rate of descent of the load when said load is being lowered for maintaining a substantially controlled constant speed that the cable lowers the load,
- a remote control valve for applying the disc brake to control the speed that the load is lowered, and
- an air pressure regulator for regulating an air pressure to said disc brake caliper to provide sufficient braking force to the winch relative to the load on the cable whereby additional air pressure provides additional braking force.
Method of controlling the lowering of a load attached to a cable positioned on a winch for use in an oil field operation comprising the steps of:
- engaging a friction brake to stop the load;
- disengaging the friction brake to allow the load to be lowered regulating the engagement of a disc brake caliper to a disk to substantially control the rate of descent of the load when said load is being lowered by applying a fluid pressure to the caliper;
- and
- maintaining a substantially controlled constant speed that the cable lowers the load using the disc caliper constantly applied to the disc when said friction brake is disengaged.
Dependencies are inferred from the claim text.