Self-adapting bulging head expanding tube reinforcement device
A reinforcement device and expansion tube technology, applied in wellbore/well parts, earthwork drilling and production, etc., can solve the problems of long sealing section, good sealing performance, large inner diameter, etc., and achieve long sealing section, good sealing performance, The effect of large internal diameter
Inactive Publication Date: 2007-10-24
DAQING OILFIELD CO LTD
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Problems solved by technology
[0003] In order to overcome the shortcomings of the existing reinforcing device, such as small internal diameter, short sealing section and poor sealing performance, the invention provides a self-adaptive expansion head expansion tube reinforcement device, the self-adaptive expansion head expansion tube reinforcement device has a reinforced internal passage Large diameter, long sealing section and good sealing performance
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[0009] The present invention will be further described below in conjunction with the accompanying drawings:
[0010] As shown in FIG. 1 , the self-adaptive expansion head expansion tube reinforcement device includes a pull rod 1, and the upper end of the pull rod 1 is connected with an anti-falling head 22. On the upper end of the slip sleeve 10, the conical mandrel 2, the first-stage expansion head 3 and the centralizer 5 are prevented from falling into the well; the lower end of the tie rod 1 is connected with the T-shaped conical mandrel 2, and the lower end of the conical mandrel 2 is connected with the first The expansion head 3 is connected, the upper and lower ends of the primary expansion head 3 are conical, the sealing groove 21 of the primary expansion head 3 is filled with a sealing ring, and the lower end of the primary expansion head 3 is connected with the centralizer 5 through the connecting rod 4, and the centralizer 5. The upper and lower ends are conical, and...
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An adaptive expansible head expansion tube strengthening device mainly solves the problem of small inner path diameter after the prior strengthening device is strengthened. Its features are: the lower end of pull rod which upper end is equipped with mousing-head (22) is connected with conical mandrel (2), the lower end of said conical mandrel (2) is connected with first expansible head (3), the first expansible head (3) lower end connecting rod (4) is connected with centralizing body (5), the split expansible head (7) is clamp-jacketed between the centralizing sleeve (6) and conical mandrel (2), the upper end of conical mandrel (2) is equipped with seal ring (8), the seal ring (8) is equipped-in with releasing slide sleeve (10), the releasing slide sleeve (10) is equipped with releasing groove, the releasing slide sleeve (10) is connected-out with releasing retchet (12) through pin (11), the inner slide sleeve (14) is equipped with slide in (15), the releasing retchet (12) is nested-out with expansion tube (17). The adaptive expansible head expansion tube strengthening device has the characteristics of bigger inner path diameter and longer sealed section after strengthened.
Description
Technical field: [0001] The invention relates to a sealing reinforcement device used for casing damaged sections in the field of oil and water well workover in oilfields, in particular to a reinforcement device for self-adaptive expansion head expansion pipes. Background technique: [0002] With the development of oilfields, more and more casings of oil-water wells are damaged, which affects oilfield recovery. In order to improve oilfield recovery, it is necessary to reinforce casings of oil-water wells with damaged casings. At present, the reinforcement of damaged casing mainly adopts hanging pipe reinforcement, explosion welding reinforcement, bellows subsidy, gas sealing reinforcement, hydraulic sealing reinforcement and other methods. At present, hydraulic seal reinforcement and gas seal reinforcement technology are commonly used, but due to the influence of the reinforced pipe string structure, on the one hand, the inner diameter can only reach φ108mm (wall thickness 5...
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IPC IPC(8): E21B29/10
Inventor 刘合王中国孙晓明徐炳辉闫百莹李庚昌
Owner DAQING OILFIELD CO LTD