Anchoring ball type casing truing unit and truing method thereof

A ball shaping and shaping device technology, which is applied in the direction of earthwork drilling, wellbore/well parts, etc., can solve the problems of unstable state of the pipe string, long repair operation time, increased operation cost, etc., achieve shortened construction period, simple structure, The effect of reducing construction work costs
CN101942979AActive Publication Date: 2011-01-12DAGANG OIL FIELD GRP +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DAGANG OIL FIELD GRP
Publication Date
2011-01-12

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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.
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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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