发明名称 |
ROTOR OF DOWNHOLE SCREW MOTOR, METHOD AND DEVICE FOR MAKING THEREOF. |
摘要 |
PCT No. PCT/SU86/00008 Sec. 371 Date Sep. 1, 1987 Sec. 102(e) Date Sep. 1, 1987 PCT Filed Jan. 31, 1986 PCT Pub. No. WO87/04753 PCT Pub. Date Aug. 13, 1987.A rotor (1) of a screw hydraulic downhole motor, made as a hollow multiple-start screw featuring a substantially constant wall thickness. The ratio of the length of the rotor (1) cross-sectional outside contour to the length of the circumscribed circle of the contour is substantially within 0.9 and 1.05. When making the rotor (1) a forming element is inserted into a tubular blank, and a fluid pressure is applied to the outside blank surface. A device for making the rotor comprises a hollow housing accommodating a forming element installed on centering bushings. The bushings have fitting areas adapted for the ends of the tubular blank to fit thereon. |
申请公布号 |
EP0265521(A4) |
申请公布日期 |
1989.03.14 |
申请号 |
EP19860902578 |
申请日期 |
1986.01.31 |
申请人 |
PERMSKY FILIAL VSESOJUZNOGO NAUCHNO-ISSLEDOVATELSKOGO INSTITUTA BUROVOI TEKHNIKI |
发明人 |
KOCHNEV, ANATOLY MIKHAILOVICH;VSHIVKOV, ANDREI NIKOLAEVICH;GOLDOBIN, VLADIMIR BORISOVICH;NIKOMAROV, SAMUIL SOLOMONOVICH |
分类号 |
E21B4/02;F01C1/10;(IPC1-7):E21B4/02 |
主分类号 |
E21B4/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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