| US 7,337,851 B2 | ||
| Rotating stuffing box with split standpipe | ||
| Craig Melvin Hall, Lashburn Sask. (Canada); and Derek Tebay, Lloydminster (Canada) | ||
| Assigned to Weatherford/Lamb, Inc., Houston, Tex. (US) | ||
| Filed on Sep. 03, 2004, as Appl. No. 10/933,819. | ||
| Prior Publication US 2006/0048947 A1, Mar. 09, 2006 | ||
| Int. Cl. E21B 33/00 (2006.01) | ||
| U.S. Cl. 166—377 [166/84.1; 166/68.5] | 21 Claims |
| 7. 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.
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