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1. (WO2015060246) PLUG FOR WELL DRILLING
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2015/060246 International Application No.: PCT/JP2014/077831
Publication Date: 30.04.2015 International Filing Date: 20.10.2014
IPC:
E21B 43/26 (2006.01) ,E21B 33/12 (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
43
Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
25
Methods for stimulating production
26
by forming crevices or fractures
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
33
Sealing or packing boreholes or wells
10
in the borehole
12
Packers; Plugs
Applicants:
株式会社クレハ KUREHA CORPORATION [JP/JP]; 東京都中央区日本橋浜町三丁目3番2号 3-3-2, Nihonbashi-Hamacho, Chuo-ku, Tokyo 1038552, JP
Inventors:
大倉正之 OKURA Masayuki; JP
▲高▼橋健夫 TAKAHASHI Takeo; JP
Agent:
特許業務法人HARAKENZO WORLD PATENT & TRADEMARK HARAKENZO WORLD PATENT & TRADEMARK; JP
Priority Data:
2013-22022323.10.2013JP
Title (EN) PLUG FOR WELL DRILLING
(FR) BOUCHON POUR UN FORAGE DE PUITS
(JA) 坑井掘削用プラグ
Abstract:
(EN) Provided is a plug for well drilling comprising a mandrel and a member attached to the outer circumferential face that intersects the mandrel in the axial direction, wherein at least one of the mandrel or the member is formed from a degradable material, preferably polyglycolic acid, and the radius of curvature for a bent portion is 0.5-50 mm. Also provided is a well digging method characterized in that all or a portion of the plug for well drilling degrades after the wellbore is sealed using the plug for well drilling.
(FR) L'invention concerne un bouchon pour un forage de puits, ledit bouchon comprenant un mandrin et un élément fixé à la face circonférentielle externe qui coupe le mandrin dans la direction axiale, le mandrin et/ou l'élément étant composés d'un matériau dégradable, de préférence de l'acide polyglycolique, et le rayon de courbure d'une partie pliée variant entre 0,5 et 50 mm. L'invention concerne également un procédé de creusement de puits caractérisé en ce que la totalité ou une partie du bouchon pour un forage de puits se dégrade après que le puits de forage est scellé à l'aide du bouchon pour le forage de puits.
(JA)  マンドレルと、マンドレルの軸方向に直交する外周面上に取り付けられる部材とを備える坑井掘削用プラグであって、マンドレルまたは該部材の少なくとも1つが、分解性材料、好ましくはポリグリコール酸から形成され、かつ、その曲折部分の曲率半径が0.5~50mmである坑井掘削用プラグ;並びに、前記の坑井掘削用プラグを使用して、坑井孔の目止め処理を行った後に、坑井掘削用プラグの一部または全部が分解されることを特徴とする坑井掘削方法。
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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, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, 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 Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (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: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
CA2927080US20160237774JPWO2015060246