Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector
Patent
1996-09-20
1998-09-08
Tsay, Frank
Boring or penetrating the earth
With tool shaft detail
Shaft carried guide or protector
1662416, E21B 1710
Patent
active
058031936
ABSTRACT:
A drill pipe/casing protector assembly for an underground drilling system comprises a well bore in an underground formation, a fixed tubular casing installed in the well bore, a rotary drill pipe extending through the casing and having an O.D. spaced from an I.D. of the casing (or well bore) during normal drilling operations, and a protective sleeve mounted around the drill pipe and spaced from the I.D. of the casing, and upper and lower thrust bearings affixed to the drill pipe above and below the sleeve to retain the sleeve in a fixed axial position on the drill pipe. The sleeve contacts the I.D. of the casing when the drill pipe deflects off-center to protect the casing from contact with the drill pipe or its tool joints during rotation of the drill pipe. Axial grooves in an I.D. wall of the sleeve allow fluid under pressure to circulate through a space formed between the I.D. of the sleeve and the O.D. of the drill pipe. Generally flat bearing surface regions on the I.D. wall of the sleeve between adjacent grooves are arranged in a polygon configuration for tangentially contacting the O.D. of the drill pipe around the sleeve I.D. The sleeve separates from the O.D. of the drill pipe upon circulation of a fluid film under pressure between the sleeve and drill pipe to produce a fluid bearing effect with reduced frictional drag. End slots at the top and bottom annular end walls of the sleeve provide enhanced fluid bearing effects in the clearance regions between the sleeve and the adjacent thrust bearings.
REFERENCES:
patent: 2308316 (1943-01-01), Smith et al.
patent: 2318878 (1943-05-01), Miller
patent: 2368415 (1945-01-01), Grant
patent: 2388416 (1945-11-01), Johnson
patent: 2715552 (1955-08-01), Lane
patent: 2715553 (1955-08-01), Ritter et al.
patent: 2860013 (1958-11-01), Medearis
patent: 2966121 (1960-12-01), Crowl
patent: 3063759 (1962-11-01), Moore et al.
patent: 3088532 (1963-05-01), Kellner
patent: 3320004 (1967-05-01), Garrett
patent: 3397017 (1968-08-01), Grant et al.
patent: 3410613 (1968-11-01), Kuus
patent: 3528499 (1970-09-01), Collett
patent: 3560060 (1971-02-01), Morris
patent: 3963075 (1976-06-01), Evans
patent: 3999811 (1976-12-01), Gray
patent: 4071101 (1978-01-01), Ford
patent: 4083612 (1978-04-01), Olson
patent: 4099564 (1978-07-01), Hutchinson
patent: 4787448 (1988-11-01), Sable
patent: 4796670 (1989-01-01), Russell et al.
patent: 4907661 (1990-03-01), Lloyd
patent: 5069297 (1991-12-01), Krueger et al.
patent: 5247990 (1993-09-01), Sudol et al.
Krueger R. Ernst
Moore N. Bruce
Tsay Frank
Western Well Tool, Inc.
LandOfFree
Drill pipe/casing protector assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drill pipe/casing protector assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill pipe/casing protector assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1273531