Rotating stuffing box with split standpipe
AssigneeWeatherford/Lamb, Inc.
InventorsCraig Hall, Derek Tebay
Life of this patent
Estimating the term…
Abstract
A system comprising a top mounted rotating stuffing box is provided for use with downhole pump (e.g., Progressing Cavity Pump) applications. The system also includes a split standpipe configuration that allows the stuffing box to be quickly installed or removed as needed. The split standpipe feature combined with the top-mounted aspect of the stuffing box allow for the corresponding drive units to stay intact while the stuffing box is being installed or removed.
Claims21
A downhole pump implementation comprising:
- a drive string;
- a drive system comprising a top mounted rotating stuffing box, wherein the top mounted rotating stuffing box rotates with the drive string;
- and
- a downhole progressing cavity pump.
A method of removing a stuffing box comprising:
- providing a drive system, wherein the drive system comprises a top mounted rotating stuffing box and a drive unit;
- providing a safety clamp for securing the weight of a drive string;
- shutting down the well;
- securing the weight of the drive string by placing the safety clamp on an exposed portion of the drive string at the surface;
- holding the drive unit stationary;
- rotating the stuffing box, relative to the drive unit;
- and
- lifting the stuffing box upwards and removing the stuffing box from the drive system.
An assembly for pumping fluid comprising:
- a drive system comprising a drive unit;
- a top mounted rotating stuffing box positioned adjacent the drive unit;
- an upper standpipe interfacing with a lower standpipe;
- and
- a drive string.
A downhole pump implementation comprising:
- a drive string;
- a drive system comprising a top mounted rotating stuffing box, wherein the top mounted rotating stuffing box comprises a balanced seal implementation;
- and
- a downhole progressing cavity pump.
Dependencies are inferred from the claim text.