| 摘要 |
985,122. Wells, &c. G. A. THOMAS, J. R. HATCH, and D. CRAVEN. Sept. 21, 1962 [May 8, 1962], No. 36031/62. Heading E1F. An open ended sleeve 32 is expanded to contact a producing formation in a bore hole 15, cement is allowed to expand the sleeve further and to harden within, above and beneath the sleeve, and oil from the formation is allowed to penetrate the sleeve wall. A unit 17 comprising a tube 20 carrying the sleeve 32 is incorporated in a casing string 16. Rings 34, at the ends of the sleeve, comprising telescopically sliding copper tubes, are expanded by fluid-pressure, and a sleeve 26 is moved to cover a valve 51 and also telescopic port tubes 54. Cement injected down the string rises outside it passing through the sleeves 32 and extending tubes 54 (Fig. 4, not shown). In Fig. 10 the sleeve 32 is replaced by a rigid sleeve 73 with expansible end sections 71, 72. In a well having several producing formations, each having a unit 17, the sleeves 26 act as valves which control the flow from each formation. Specification 985,121 is referred to.
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