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1. (WO2018203064) IMPROVEMENTS IN OR RELATING TO WELL ABANDONMENT AND SLOT RECOVERY
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Pub. No.: WO/2018/203064 International Application No.: PCT/GB2018/051182
Publication Date: 08.11.2018 International Filing Date: 03.05.2018
IPC:
E21B 23/04 (2006.01) ,E21B 31/00 (2006.01) ,E21B 31/20 (2006.01)
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
23
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
04
operated by fluid means, e.g. actuated by explosion
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
31
Fishing for or freeing objects in boreholes or wells
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
31
Fishing for or freeing objects in boreholes or wells
12
Grappling tools, e.g. tongs or grabs
20
gripping internally, e.g. fishing spears
Applicants:
ARDYNE TECHNOLOGIES LIMITED [GB/GB]; 1 St Swithin Row Aberdeen Aberdeenshire AB10 6DL, GB
Inventors:
WARDLEY, Michael; GB
HANSEN, Steffen; NO
Agent:
IPENTUS LIMITED; The Old Manse Wilsontown, By Forth Lanark Strathclyde ML11 8EP, GB
Priority Data:
1707134.104.05.2017GB
Title (EN) IMPROVEMENTS IN OR RELATING TO WELL ABANDONMENT AND SLOT RECOVERY
(FR) AMÉLIORATIONS APPORTÉES OU SE RAPPORTANT À L'ABANDON DE PUITS ET À LA RÉCUPÉRATION DE FENTES
Abstract:
(EN) A method and apparatus for casing recovery for well abandonment. A string is run-in, the string including a hydraulic jack (18), an anchor (28), a casing spear (20), a downhole flow pulsing device (22) and a pressure drop sub (24). The casing spear grips an upper end of the length of casing to be pulled. The anchor is set in casing of a greater diameter above the length of cut casing. Fluid pumped through the string and through the pressure drop sub will increase fluid pressure at the hydraulic jack to a first fluid pressure (78). Fluid pumped through the downhole flow pulsing device will vary the fluid flow superimposing a cyclic pressure (82) on the first pressure (78), causing oscillation of an inner mandrel (30) of the hydraulic jack. The jack moves the oscillating inner mandrel upwards relative to the anchor to pull the length of casing.
(FR) L'invention concerne un procédé et un appareil de récupération de tubage pour l'abandon de puits. Un train est inséré, le train comprenant un vérin hydraulique (18), un ancrage (28), un harpon de tubage (20), un dispositif d'impulsion d'écoulement de fond de trou (22) et un raccord de chute de pression (24). Le harpon de tubage serre une extrémité supérieure de la longueur du tubage à tirer. L'ancrage est placé dans un tubage d'un diamètre supérieur au-dessus de la longueur du tubage coupé. Le fluide pompé à travers le train et à travers le raccord de chute de pression augmentera ensuite la pression de fluide au niveau du vérin hydraulique à une première pression de fluide (78). Le fluide pompé à travers le dispositif d'impulsion d'écoulement de fond de trou fait varier l'écoulement de fluide superposant une pression cyclique (82) sur la première pression (78), provoquant l'oscillation d'un mandrin interne (30) du vérin hydraulique. Le vérin déplace le mandrin interne oscillant, vers le haut par rapport à l'ancrage pour tirer la longueur du tubage.
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Designated States: 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, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, 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, SA, 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
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (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)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)