WELLBORE CIRCULATION SYSTEM, KELLY BUSHING, KELLY AND TONG

WIPO Patent Application WO2001069034

A3

A system (10) for continuously circulating fluid to and through a tubular string either of coiled tubing or made up of a plurality of tubulars connected end-to-end while an upper tubular (32) is added to or removed from a top tubular (26) of the plurality of tubulars, all tubulars having a top-to-bottom fluid flow channel therethrough. The system has an upper chamber (43) with an upper sealing apparatus (34) for sealingly encompassing a portion of the upper tubular, a lower chamber (45) with a lower sealing apparatus (36) for sealingly encompassing a portion of the top tubular (26), one of the upper chamber and the lower chamber sized for accommodating connection and disconnection therein of the upper tubular and the top tubular, and gate apparatus (60) between and in fluid communication with the upper chamber and the lower chamber.

WO/2006/078883	DOUBLE SWIVEL APPARATUS AND METHOD
WO2007081797	ROTARY FLUID-SEALING STRUCTURE USING SPEED-REDUCTION STAGES

ALLEN JOHN TIMOTHY (US)
BOX STEVEN ANTONY (US)
PIETRAS BERND-GEORG (DE)
HABETZ JEFFREY MICHAEL (US)

PCT/GB2001/001061

March 07, 2002

March 12, 2001

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WEATHERFORD LAMB (US)
HARDING RICHARD PATRICK (GB)
ALLEN JOHN TIMOTHY (US)
BOX STEVEN ANTONY (US)
PIETRAS BERND GEORG (DE)
HABETZ JEFFREY MICHAEL (US)

E21B3/04; E21B17/00; E21B19/10; E21B19/16; E21B19/24; E21B21/01; E21B21/10; E21B33/068; (IPC1-7): E21B19/16; E21B21/01; E21B21/10; E21B3/04; E21B19/24; E21B17/00

WO1998016716A1	1998-04-23
WO2000022278A1	2000-04-20
WO2000023686A1	2000-04-27
WO2000079092A2	2000-12-28
WO1999034090A1	1999-07-08

US3559739A	1971-02-02
US6119772A	2000-09-19
US5451084A	1995-09-19
US4593773A	1986-06-10

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