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: 2010-10-06
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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Embodiment Construction
[0009] The present invention will be further described below in conjunction with accompanying drawing:
[0010] Depend on figure 1 As shown, 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-off head 22. The upper end of the sliding sleeve 10 prevents the conical mandrel 2, the primary expansion head 3 and the centralizing body 5 from falling into the well; Connected, the upper and lower ends of the first-stage expansion head 3 are conical, and the sealing groove 21 of the first-stage expansion head 3 is filled with a sealing ring. It is conical, and there are grooves 20 evenly distributed longitudinally on the centralizer 5, and the first-stage expansion head 3 is mainly used for expansion, using the expansion principle of metal materials, that is, when a stress is applied to a steel piece, strain will appear on the material (deformation), through the well fluid pressure ...
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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 in the casing damage section in the oil-water well workover field of an oil field, in particular to a self-adaptive expansion head expansion tube reinforcement device. Background technique: [0002] With the development of oilfields, more and more oil and water well casings are damaged, which affects the recovery rate of oilfields. In order to improve oil recovery, it is necessary to strengthen the casing of the oil-water well with damaged casing. At present, methods such as hanging pipe reinforcement, explosive welding reinforcement, bellows subsidy, gas seal reinforcement, and hydraulic seal reinforcement are mainly used for the reinforcement of damaged casing. At present, hydraulic seal reinforcement and gas seal reinforcement are commonly used. However, due to the influence of the structure of the reinforced pipe string, on the one hand, the internal diameter after reinforcement can onl...
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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