Patent SG-11201407760X-A (SG)
Title: Downhole apparatus
Inventor: CHURCHILL ANDREW PHILIP
IPC: E21B23/00
Filed: 2013-05-20
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 28 November 2013 (28.11.2013) WIPOIPCT (10) International Publication Number WO 2013/175189 A3 (51) International Patent Classification: E21B 23/00 (2006.01) E21B 23/04 (2006.01) (21) International Application Number: (22) International Filing Date: (25) Filing Language: (26) Publication Language: PCT/GB2013/051302 20 May 2013 (20.05.2013) English English (30) Priority Data: 1209012.2 22 May 2012 (22.05.2012) GB (71) Applicant: CHURCHILL DRILLING TOOLS LIM­ ITED [GB/GB]; 22 Lochinch Drive, Cove, Aberdeen AB12 3RY (GB). (72) Inventor: CHURCHILL, Andrew Philip; 22 Lochinch Drive, Cove, Aberdeen AB12 3RY (GB). (74) Agent: SHANKS, Andrew; Marks & Clerk LLP, Aurora, 120 Bothwell Street, Glasgow G2 7JS (GB). (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, 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, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3)) — before the expiration of the time limit for amending the claims and to be republished in the event of receipt of amendments (Rule 48.2(h)) (88) Date of publication of the international search report: 3 April 2014 (54) Title: DOWNHOLE APPARATUS 02.23010.001 [56.64±0.03] 18a o\ 00 i-H i> i-H cn i-H o CJ Top Tool 20b 0 2.270±0.001 [57.66±0.03] Middle Tool Fig. 1 20a 0 2.250±0.001 [57.15±0.03] Bottom Tool (57) Abstract: Downhole apparatus comprises first (10) and second (12) tools for location in tubing string. The first a tool has a first seat (22a) of a first diameter and the second tool has a second seat (22b) of second diameter a larger than the first diameter. First and second activating devices (30) are provided for use in activating the respective first and second tools. The first activating device in­ cludes first a activating profile (34) having an extended diameter larger than the first diameter and smaller than the second diameter and retracted diameter a smaller than the first diameter. The second activating device includes second a activating profile having an extended diameter larger than the second diameter and retracted diameter a smaller that the first diameter.