Patent SG-11201807872U-A (SG)
Title: Wellhead metal seal with energizing ring having trapped fluid reliefs
Inventor: PALLINI JOSEPH
IPC: E21B33/04
Filed: 2017-03-31
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property -, Organization 11111111011110111010101111101011111011101011111001010111111101111101111011111 International Bureau .. ..... ..Yi j ..... .....!;,,, (10) International Publication Number (43) International Publication Date WO 2017/173245 Al 5 October 2017 (05.10.2017) WI P0 I P CT (51) International Patent Classification: (74) Agents: DOMBROWSKI, Joanna, M. et al.; General E21B 33/04 (2006.01) Electric Company, Global Patent Operation, 901 Main Av- enue, 3rd Floor, Norwalk, CT 06851 (US). (21) International Application Number: PCT/US2017/025330 (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, (22) International Filing Date: AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, 31 March 2017 (31.03.2017) BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, (25) Filing Language: English DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, (26) Publication Language: English KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, (30) Priority Data: MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, 15/087,421 31 March 2016 (31.03.2016) US NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, (71) Applicant: VETCO GRAY INC. [US/US]; 4424 West TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, Sam Houston Pkwy North, Suite 100, Houston, TX 77041 ZA, ZM, ZW. (US). (84) Designated States (unless otherwise indicated, for every (72) Inventors: PALLINI, Joseph, W.; 12221 N. Houston kind of regional protection available): ARIPO (BW, GH, Rosslyn Rd., Houston, TX 77088 (US). HUNTER, Rick, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, C.; 12221 N. Houston Rosslyn Rd., Houston, TX 77086 TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, (US). FORD, David, L.; 12221 N. Houston Rosslyn Rd., TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, — Houston, TX 77086 (US). DU, Robert, Jen-Yue; 12221 DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, N. Houston Rosslyn Rd., Houston, TX 77086-3216 (US). LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, [Continued on next page] (54) Title: WELLHEAD METAL SEAL WITH ENERGIZING RING HAVING TRAPPED FLUID RELIEFS = (57) : A wellhead housing has a bore with an inner seal surface. A hanger with an outer seal surface lands in the bore. = = = — = , / , - / Wickers are formed on at least one of the seal surfaces. A metal seal ring lands between the seal surfaces, the seal ring having an- nular inner and outer legs separated by an annular slot. An ever- gizing ring has inner and outer diameter surfaces that slide against the inner and outer legs of the seal ring when the energizing ring is moved downward in the slot to radially deform the inner and = outer legs into sealing engagement with the wellhead housing and .411014% = 3 7 Ve hanger. The energizing ring has an inner diameter relief and an = 11 40 , diameter being outer relief, each a partially circumferential groove = extending upward from a lower rim. The reliefs define a bridge of ' .0 100 1 = _ V narrower radial thickness in the lower rim. 1 I = 29 OA - 15 _ 31- 2 ler illir%// 3,3 = 25 Il 18 \' ___ - 011 17 27 inle kr ) 71. '''lla AdkVt$ N A Alims. en ei 35 __ / IN 1-1 FIG.1 IN 1-1 0 ei O WO 2017/173245 Al MIDEDIMOMOIDEIHMEMOMMEIIMMIMMOVOIMIE SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, as to the applicant's entitlement to claim the priority of GW, KM, ML, MR, NE, SN, TD, TG). the earlier application (Rule 4.17(iii)) Declarations under Rule 4.17: Published: — as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(ii)) with international search report (Art. 21(3))