Coiled tubing injector with flow limiter
AssigneeVarco I/P, Inc.
InventorsTimothy S. Steffenhagen, David W. McCulloch, John E. Goode
Life of this patent
Estimating the term…
Abstract
A flow-limiting device is placed in a hydraulic fluid circuit between a hydraulic pump of, for example, a power pack, and a motor of a coiled tubing injector. The flow-limiting device allows hydraulic fluid to flow through the circuit, but limits the rate of flow in order to avoid thermal damage to the motor.
Claims9
A coiled tubing injector system, comprising:
- a coiled tubing injector having a pair of opposing continuous chains rotated by power supplied from at least one hydraulic motor, the motor being connected to a hydraulic power circuit for receiving a flow of hydraulic fluid under pressure;
- and
- a flow limiting device coupled in the hydraulic circuit for preventing hydraulic fluid from flowing into the motor at rates in excess of a predetermined rate.
A coiled tubing injector, comprising:
- a pair of opposing continuous chains rotated by power supplied from at least one hydraulic motor, the motor being connected to a hydraulic power circuit for receiving a flow of hydraulic fluid under pressure when coupled with a hydraulic pumping system;
- and
- a flow limiting device coupled in the hydraulic circuit for preventing hydraulic fluid from flowing into the motor at rates in excess of a predetermined rate.
In a coiled tubing injector, the injector having opposing continuous chains rotated by power supplied from at least one hydraulic motor mounted on the injector, the motor being connected to a hydraulic power circuit for receiving a flow of hydraulic fluid under pressure, a method comprising:
- coupling a hydraulic pumping system to the hydraulic power circuit;
- and
- limiting the maximum flow rate of the hydraulic fluid delivered to the motor by a flow limiting device coupled in the hydraulic circuit.
The method of claim 9, wherein the flow limiting device is mounted on the coiled tubing injector.
Dependencies are inferred from the claim text.