Force balanced rotating pressure control device

Details Force balanced rotating pressure control device Force balanced rotating pressure control device

2007-06-04

2010-06-29

Neuder, William P (Department: 3672)

Wells

Above ground apparatus

With seal for reciprocating member

C277S926000

Reexamination Certificate

active

07743823

ABSTRACT:
Force balancing adjusts hydraulic fluid pressure in an upper piston area of a Rotating Pressure Control Device (RPCD) that has an inner housing rotatably engaged within an outer housing by an upper bearing and a lower bearing. The hydraulic fluid pressure is adjusted to balance net force in a upper piston area and a lower piston area. The fluid pressure adjustment creates a force differential that balances the total load transmitted through the upper bearing and the lower bearing and thereby extends the life of the sealing element and bearings. Additionally, a wear indicator signals the end of the useful life of the drill pipe sealing element.

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