SG11201408048VA - Safety valve with independent flow tube - Google Patents

Abstract

(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau „ (10) International Publication Number (43) International Publication Date ^ ^ WO 2014/003731 A1 3 January 2014 (03.01.2014) WIPO I PCT (51) International Patent Classification: E21B 34/08 (2006.01) E21B 34/06 (2006.01) (21) International Application Number: (22) International Filing Date: (25) Filing Language: (26) Publication Language: PCT/US2012/044310 27 June 2012 (27.06.2012) English English (71) Applicant (for all designated States except US): HAL­ LIBURTON ENERGY SERVICES, INC. [US/US]; 10200 Bellaire Boulevard, Houston, Texas 77072 (US). (72) Inventors; and (75) Inventors/Applicants (for US only): VICK, James Dan, Jr. [US/US]; 3305 Rankin Street, Dallas, Texas 75202 (US). COLLINS, Leo G. [US/US]; 13208 Cedar Lane, Farmers Branch, Texas 75234 (US). BRIMER, Jeremy Pike [US/US]; 1012 Rockton Drive, Wylie, Texas 75098 (US). (74) Agents: PRATT, John S. et al.; Kilpatrick Towsend & Stockton LLP, 1100 Peachtree Street, Suite 2800, Atlanta, Georgia 30309 (US). (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, 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, KM, 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, 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, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3)) (54) Title: SAFETY VALVE WITH INDEPENDENT FLOW TUBE 220 202 222 m i> m o o FIG. 2 O CJ o (57) Abstract: A safety valve can be disposed in a wellbore that is through a fluid-producing formation. The safety valve can include a flow tube that is allowed to move at least partially independent, or free, from piston a assembly to avoid negative effects from forces on the flow tube from closing a assembly, such as one including flapper. a For example, the flow tube may not be required to be rigidly connected to a piston assembly such that the flow tube can move more than the piston assembly moves.