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1. (WO2007005576) WASHPIPE SEAL
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/005576 International Application No.: PCT/US2006/025518
Publication Date: 11.01.2007 International Filing Date: 29.06.2006
Chapter 2 Demand Filed: 10.01.2007
IPC:
E21B 19/00 (2006.01) ,F16J 15/447 (2006.01)
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
19
Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
J
PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS
15
Sealings
44
Free-space packings
447
Labyrinth packings
Applicants:
SKF USA INC. [US/US]; 1510 Gehman Road Kulpsville, Pennsylvania 19443, US (AllExceptUS)
MARTIN, Kevin J. [US/US]; US (UsOnly)
Inventors:
MARTIN, Kevin J.; US
Agent:
BUFALINO, Angelo J.; Vedder Price Kaufman & Kammholz 222 North LaSalle Street Chicago, Illinois 60601, US
Priority Data:
11/174,68705.07.2005US
11/427,19628.06.2006US
Title (EN) WASHPIPE SEAL
(FR) GARNITURE DE TUBE D'USURE
Abstract:
(EN) A controlled leakage seal assembly (18) having a first stationary portion (20) adapted to be connected in substantially fluid-tight relation to a source of drilling fluid and a second portion adapted to be connected in substantially fluid tight relation to a rotary portion (22) including a washpipe (70). The seal includes a first housing (26) and a stack of radially inwardly extending, spaced apart annular stators (64a, 64b), and a second seal housing (22) and stack of spaced apart radially outwardly extending annular rotors (78a, 78b) interleaved with one another. The seal assembly, a cartridge, permits the first and second housings to rotate relative to each other in substantially fluid-tight relation except for drilling fluid entering an outlet region at greatly reduced pressure. In a preferred embodiment, the seal is held by a sleeve that permits the cartridge to be removed and replaced while the fluid connections to the sleeve remains.
(FR) L'invention porte sur une garniture étanche présentant une première partie fixe formant une barrière étanche pour une source de fluide de forage et une deuxième partie connectée de manière quasi étanche à un élément tournant comprenant un tube d'usure. La garniture comporte un premier logement et une pile de stators annulaires séparés s'étendant radialement vers l'extérieur et un deuxième logement étanche et une pile de rotors annulaires séparés s'étendant radialement vers l'extérieur imbriqués les uns dans les autres. La garniture comporte une cartouche qui permet au premier et au deuxième logement de tourner l'un par rapport à l'autre sans quasiment laisser passer de fluide, si ce n'est par une zone de sortie où le fluide de forage peut filtrer sous une pression fortement réduite. Dans une exécution préférée le joint est maintenu par une gaine qui permet de retirer la cartouche et de la remplacer alors que les connexions avec la gaine demeurent.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
NO20080057EP1899571CA2613872