SG11201408286WA - Arrangement for continuous circulation of drilling fluid during drilling operations - Google Patents

Abstract

(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 27 December 2013 (27.12.2013) WIPOIPCT (10) International Publication Number WO 2013/191559 A1 (51) International Patent Classification: E21B 19/16 (2006.01) E21B 21/10 (2006.01) (21) International Application Number: PCT/N02013/050107 (22) International Filing Date: 13 June 2013 (13.06.2013) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 20120701 18 June 2012 (18.06.2012) NO (71) Applicant: WEST DRILLING PRODUCTS AS [NO/NO]; Postboks 374, N-4067 Stavanger (NO). (72) Inventors: SKJ^ERSETH, Odd B.; Ulsbergleitet 19, N- 4034 Stavanger (NO). EILERTSEN, Bjorn; Notveien 11, N-4085 Hundvag (NO). (74) Agent: HAMS0 PATENTBYRA ANS; P.O. Box 171, N- 4302 Sandnes (NO). (81) Designated States (unless otherwise indicated, for every kind of national protection available)'. AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available)'. ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). [Continued on next page] (54) Title: ARRANGEMENT FOR CONTINUOUS CIRCULATION OF DRILLING FLUID DURING DRILLING OPERATIONS (57) Abstract: A circulation unit (3) for an arrangement arranged to con­ tinuously circulate drilling fluid during drilling is described, in which a housing (31) is provided with a centre bore (313) which defined is by upper and lower annular sealing elements (32, 32') which are rotatably supported in the housing (31); the sealing elements (32, 32') are provided with a centre opening (321) which, by the expansion of said sealing elements (32, 32'), is closable or fits tightly against a pipe (5, 51, 51', 431); and gate a valve (34) in closed state a forms a fluid-tight partition between upper and lower cham­ bers (311, 312) in the housing (31), and in which each of the sealing ele­ ments (32, 32') is connected in a fluid-tight manner to rotatable a packer pipe (331) surrounded by a packer assembly (33 and 33', respectively) that fits tightly against the circumference of the packer pipe (331) and against the housing (31). An arrangement for the continuous circulation of drilling fluid during drilling, including circulation a unit (3) arranged between upper and lower rotary units (2, 2'), is described as well. 0\ •H o\ i-H o CJ O £ Fig. 1 WO 2013/191559 A11 lllll llllllll II llllll III lllll lllll III III III lllll lllll lllll lllll lllll llll llll lllllll llll llll Published: — with international search report (Art. 21(3))