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Anchoring ball type casing truing unit and truing method thereof

A ball shaping and shaping device technology, used in earth-moving drilling, wellbore/well components, etc., can solve the problems of unstable pipe string state, long repair operation time, increased operation cost, etc., and achieves shortened construction period, simple structure, The effect of reducing the cost of construction work

Active Publication Date: 2013-07-10
DAGANG OIL FIELD GRP +2
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Problems solved by technology

[0003] In order to overcome the shortcomings of the existing ball shaper when repairing the casing, it is easy to damage the drilling tool, the unstable state of the pipe string makes the repair operation time longer, and the operating cost increases. The present invention provides an anchored ball type casing shaper and casing shaping method

Method used

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  • Anchoring ball type casing truing unit and truing method thereof
  • Anchoring ball type casing truing unit and truing method thereof

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with drawings and embodiments. However, those skilled in the art should know that the present invention is not limited to the specific embodiments listed, as long as it conforms to the spirit of the present invention, it should be included in the protection scope of the present invention.

[0020] The anchored ball casing shaping device comprises an anchor 30 (see attached figure 1 ) and ball shaper 31 (see attached figure 2 ), the lower end of the anchor 30 is fixedly connected to the upper end of the ball shaper 31; or the anchor 30, the drill collar, and the ball shaper 31 are fixedly connected in sequence from top to bottom, and the length of the inserted drill collar depends on the casing It depends on the needs of the shaping operation well.

[0021] The ball shaper 31 includes an upper joint 20 , a mandrel 21 , a tapered sleeve 23 and a connecting sleeve 22 . The upper end of the mandrel 21 ...

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Abstract

The invention relates to an anchoring ball type casing truing unit and a truing method thereof, and overcomes the defects that during the repairing casing operation, the existing roll type truing unit is easy to damage a drilling rig, and the unstable state of a tubular column enables the time for repairing the operation and the operation cost to be increased. In the invention, an upper joint (1), an aerial drainage assembly (32), an anchoring assembly (33), a hydraulic cylinder assembly (34) and a lower joint (17) are arranged on an anchoring device (30) and fixedly connected in sequence; a lower joint (17) is internally provided with a check valve (35); the lower joint (17) of the anchoring device (30) is fixedly connected with the upper end of the ball truing unit (31), or the lower joint (17), a drill collar and the ball truing device (31) are fixedly connected from up to down. The invention has the following benefit effects of simple structure and reasonable design, is convenientto operate, is safe and reliable, avoids the damage to the drill, reduces the construction period, has high working performance and reduces the field operation cost.

Description

Technical field [0001] The invention relates to an oil well casing shaping device and a damaged casing shaping and repairing method, in particular to an anchor ball type casing shaping device and a casing shaping method. Background technique [0002] With the increase of oilfield development time, the fluid field and pressure field of the formation will change greatly, coupled with frequent oil and water well measures and workover construction operations, as well as many factors such as well body structure, completion and cementing quality, pipe materials and corrosion , making the technical condition of oil and water well casings worse and worse, resulting in casing rupture, deformation, perforation, mis-cutting and other damage phenomena. As a quick and effective sleeve repairing technique, expansion sleeve technology has been paid attention to by various parties, and it is an important measure to stabilize and increase production in oilfields. Conventional bulge repairin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B29/10
Inventor 张高峰赵海军罗永庆焦海中崔志强
Owner DAGANG OIL FIELD GRP
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