Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2006-05-30
2006-05-30
Thompson, Kenneth (Department: 3672)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S102000, C175S323000, C175S313000, C166S223000
Reexamination Certificate
active
07051821
ABSTRACT:
An adjustable hole cleaning device is provided for cleaning a hole in a subterranean formation. A drillstring containing the device is rotated to drill a hole through the subterranean formation. While rotating the drillstring, drilling fluid is circulated through the drillstring and the device into the hole. In response to an increase in a hydrostatic pressure of the fluid in the drillstring, cleaning elements are extended from the device to clean accumulated cuttings from the drilled hole. The cleaning elements may clean the accumulated cuttings by agitating the circulating fluid in the hole. In response to a decrease in a hydrostatic pressure of the fluid in the drillstring, the cleaning elements may be retracted back into the device. The device may also include a set of ports which hydraulically open in response to the increase of hydrostatic pressure in the drillstring to disperse drilling fluid into the hole for cleaning accumulated cuttings. The device may be deactivated by dropping an object, such as a ball, into the device to prevent the extension of the cleaning elements and the opening of the ports.
REFERENCES:
patent: 2228640 (1941-01-01), O'Neill
patent: 2239586 (1941-04-01), Appleby
patent: 2765146 (1956-10-01), Williams, Jr.
patent: 4361193 (1982-11-01), Gravley
patent: 6065541 (2000-05-01), Allen
patent: 2005/0000692 (2005-01-01), Cook et al.
Clark, R.K.; Bickman, K.L. “A Mechanistic Model for Cuttings Transport” 69th SPE Annual Technical Conference and Exhibition 1994, paper SPE 28306.
Larsen, T.I., Pilehvari, A.A. and Azar, J.J. “Development of a New Cuttings Transport Model for High—Angle Welbores Including Horizontal Wells,” paper SPE 25872, presented at the 1993 SPE Rocky Mountain Regional/Low Permeability Reservoir Symposium, Denver, Colorado, Apr. 12-14.
Rabia, H. Rig hydraulics 1989, chapter 5.
“Reduction of Annular Friction Pressure Drop Caused by Drillpipe Rotation” SPE 20305, 1989.
Ford, J.T.; et al. “Experimental Investigation of Cuttings Transport in inclined Boreholes” SPE 20421, 1990.
Martin, M.; et al. “Transport of Cuttings in Directional Wells” SPE/ADC 16083, 1987.
Stifferman, T.R.; Becker, T. “Hole Cleaning in full Scale inclined Wellbores” SPEDE Jun. 1992.
Walker, R.E. “Migration of Particles to a Hole . . . ” SPE Journal Jun. 1969, pp. 147-154.
Halliburton
Merchant & Gould
Thompson Kenneth
LandOfFree
Adjustable hole cleaning device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjustable hole cleaning device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable hole cleaning device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3535110