Patent SG-11201408562T-A (SG)
Title: Stacked piston safety valves and related methods
Inventor: VICK JAMES D JR
IPC: E21B33/06
Filed: 2012-07-30
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 6 February 2014 (06.02.2014) WIPOIPCT (10) International Publication Number WO 2014/021816 A1 (51) International Patent Classification: E21B 34/10 (2006.01) E21B 33/06 (2006.01) (21) International Application Number: (22) International Filing Date: (25) Filing Language: (26) Publication Language: PCT/US2012/048821 30 July 2012 (30.07.2012) English English (71) Applicant (for all designated States except US): HAL­ LIBURTON ENERGY SERVICES, INC. [US/US]; 10200 Bellaire Boulevard, Houston, TX 77072 (US). (72) Inventor; and (75) Inventor/Applicant (for US only)-. VICK, James, D., Jr. [US/US]; 3305 Rankin, Dallas, TX 75205 (US). (74) Agent: JORDAN, Carey, C.; MCDERMOTT WILL & EMERY LLP, 600 13th Street Nw, Washington, DC 20005 (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, 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, 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). [Continued on next page] (54) Title: STACKED PISTON SAFETY VALVES AND RELATED METHODS i-H 00 i-H CJ o (57) Abstract: Disclosed is safety a valve with redundant operators or systems. One safety valve includes piston bore a in fluid communication with a first control line via first control line port and second a control line via a second control line port, the first and second control lines convey­ ing hydraulic fluid pressure to the piston bore. First and second piston assemblies are movably ar­ ranged within the piston bore and the second piston assembly includes a transition member coupled thereto. A flow tube is arranged adjacent the transition member and moves axially within a flow passage defined in the safety valve in response to the movement of the transition member, A valve closure device moves between an open position and closed a position restricts fluid flow through the flow- passage when in the closed position, the flow tube being adapted to shift the valve closure device between open and closed positions. FIG. 28 O CJ o & WO 2014/021816 A11 lllll llllllll II llllll III III lllll llll III III lllll lllll lllll lllll lllll llll llll lllllll llll llll Published: — with international search report (Art. 21(3))