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US 7,188,683 B2Granted
Drilling method
AssigneeCoupler Developments Limited
InventorLaurence John Ayling
Life of this patent
Estimating the term…
Abstract
A system and method is disclosed for continuously supplying drilling fluid down a bore hole while adding or removing tubulars.
Claims15
A system comprising:
- (a) first and second couplers;
- (b) first and second hoist means connected to said first and second couplers for raising and lowering said first and second couplers individually;
- and
- (c) power means for raising and lowering said hoist means for performing hand-overhand motions of said first and second couplers.
1 more element
A system comprising:
- (a) first and second couplers;
- (b) first and second hoist means connected to said first and second couplers for raising and lowering said first and second couplers individually;
- and
- (c) power means for raising and lowering said hoist means for raising and lowering said first and second couplers and move them horizontally in alternate steps to perform hand-over-hand motions of said couplers.
1 more element
A system comprising:
- (a) first and second couplers;
- (b) first and second hoist means connected to said first and second couplers for raising and lowering said first and second couplers individually;
- and
- (c) power means for raising and lowering said hoist means, and moving them horizontally for performing hand-over-hand motions of said first and second couplers.
1 more element
A system comprising:
- (a) first and second couplers;
- (b) first and second hoist means connected to said first and second couplers for raising and lowering said first and second couplers individually;
- (c) power means for raising and lowering said hoist means for performing hand-over-hand motions of said first and second couplers;
- (d) each of said first and second couplers including fluid sealed housings and means for introducing and evacuating drilling fluid from said housings;
- (e) upper slip means connected to each of said couplers for securing a tubular against upward movement;
- (f) openable and closeable divider means in said housings defining upper and lower chambers in said housing;
- and
- (g) means of moving said tubular downwardly into rotational contact with said drill string for securing said tubular and said drill string together.
5 more elements
Dependencies are inferred from the claim text.