METHOD AND APPARATUS FOR INCREASING DRILLING CAPACITY AND REMOVING CUTTINGS WHEN DRILLING WITH COILED TUBING

Title:

METHOD AND APPARATUS FOR INCREASING DRILLING CAPACITY AND REMOVING CUTTINGS WHEN DRILLING WITH COILED TUBING

Document Type and Number:

WIPO Patent Application WO2004092544

Kind Code:

A3

Abstract:

An assembly for drilling a deviated borehole includes a bottom hole assembly (300) connected to a string of coiled tubing (150) and includes a bit (210) driven by a downhole motor (205) powered by drilling fluids. A surface pump (132) pumps the drilling fluids downhole through a cross valve (400) to provide a first path directing drilling fluids down the coiled tubing flowbore and a second path directing drilling fluids down the annulus. The bottom hole assembly (300) has a downhole valve (304) allowing flow between the flowbore and the annulus. A first flow passageway (404) directs drilling fluids down the coiled tubing flow bore and then up the annulus and a second flow passageway directs drilling fluids down the annulus and the up the flowbore. The bottom hole assembly (300) includes a subsurface pump (712) capable of pumping drilling fluids from the second fluid passageway to the surface. The bottom hole assembly (300) includes an electric motor (716) to rotate the subsurface pump and the motor is provided with power conduits (728) embedded in a wall of the coiled tubing. Another subsurface pump (812) may be provided, such that the subsurface pumps pump drilling fluid with cuttings to the surface and/or pump clean drilling fluids into the downhole motor to aid drilling.

More Like This:

WO/2017/105411	REAL TIME TRACKING OF BENDING FORCES AND FATIGUE IN A TUBING GUIDE
WO/1997/010411	A METHOD AND A DEVICE FOR USE IN COIL PIPE OPERATIONS
WO/2015/162363	METHOD FOR INSTALLATION AND IMPLEMENTATION OF A RIGID TUBE FROM A SHIP OR FLOATING SUPPORT

Inventors:

EPPINK JAY M (US)

Application Number:

PCT/US2004/009576

Publication Date:

May 19, 2005

Filing Date:

March 26, 2004

Export Citation:

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Assignee:

HALLIBURTON ENERGY SERV INC (US)
EPPINK JAY M (US)

International Classes:

E21B19/22; E21B21/10; E21B21/12; (IPC1-7): E21B21/06

Foreign References:

US5832956A	1998-11-10
US4291722A	1981-09-29
US6581859B2	2003-06-24
US20040104052A1	2004-06-03
US20040040749A1	2004-03-04
US20040112645A1	2004-06-17

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