Drilling-plug free tubular column with sand control and well cementation for open-hole horizontal well

A horizontal well and plug-free technology, which is applied in wellbore/well components, earthwork drilling and production, and production fluids, can solve the problems of aggravated mud pollution to the formation, difficult control of drilling pressure, and impact on oil well production, etc., to achieve operating costs Low, high construction reliability, high construction success rate
CN101701513BActive Publication Date: 2013-08-07RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
Publication Date
2013-08-07

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Abstract

The invention relates to a drilling-plug free tubular column with sand control and well cementation for an open-hole horizontal well, which comprises an external tubular column and an inner tubular column. The external tubular column comprises a sand control screen (2), an open-hole packer (3), an external positioning step (4), an external cementing machine (5) and a sleeve tube (6) are sequentially installed and connected on the an acid-washing filling valve (1). The inner tubular column comprises an oil tube (8) and an inner cementing machine (7) which is installed and connected on the oil tube (8). The inner tubular column is arranged in the external tubular column and the inner tubular column and the external tubular column are mutually fixed sealed. The invention can simplify operating procedures and reduce the frequency of running string, and does not need to perform drilling-plug operation free after cementing for well cementation, and also has the advantages of low operating cost, large drift diameter, regular inner wall, clean well-hole of sand control and well completion, high construction success ratio, large construction stability, low labor intensity, high oil well yield and the like, and can be widely applied to the process of sand control, well cementation and well completion of the open-hole horizontal well for oil exploration.
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Description

1. Technical field

[0001] The invention relates to an oil production downhole pipe string, in particular to a plug-free sand control cementing pipe string for an open-hole horizontal well. 2. Background technology

[0002] Horizontal wells for oil exploitation adopt the method of open-hole completion, which has the advantages of increasing the contact area between the well body and the oil layer, releasing formation energy to a greater extent, increasing oil well production, and developing efficiently with fewer wells. At present, open-hole horizontal wells mainly adopt the two-split sand control completion method, and the sand control completion string mainly adopts a downhole string with a blind plate. The following shortcomings or deficiencies: ① After the cementing string is run into the well, it is necessary to run in the drill plug string to carry out the plug drilling operation, and it is necessary to drill the shut-off plug, the inner cavity of the grading hoop, the ...

Claims

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