Single card oil layer blasting hole plugging column

A technology for plugging pipes and oil layers, applied in the field of pipe strings, can solve problems such as low work efficiency

Active Publication Date: 2008-12-10
DAQING OILFIELD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of low work efficiency due to the fact that the existing process string does not have the functions of positive pressure setting, rotation sealing injection hole, reverse pressure, lifting and unsealing when completing the chemical plugging and channeling operations of oil and water wells, The invention provides a plugging pipe string for a blast hole in a single stuck oil layer. The upper

Method used

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  • Single card oil layer blasting hole plugging column
  • Single card oil layer blasting hole plugging column
  • Single card oil layer blasting hole plugging column

Examples

Experimental program
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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing:

[0020] This type of single-stuck oil layer blasthole plugging string includes an upper-level packer, an intermediate-level packer and a lower-level packer connected by oil pipes, among which such as figure 1 combine figure 2 As shown, the upper packer is composed of the upper sealing joint S1, the upper sealing center pipe S2, the upper sealing well cleaning and unsealing piston S3, the upper sealing rubber sleeve sleeve S4, the upper sealing rubber sleeve S24, the upper sealing lower rubber sleeve Sleeve S5, upper seal pin S6, upper seal Hou Ning superior ball S7, upper seal Hou Ning intermediate ball S8, upper cover bowl upper sheath S10, upper cover one-way leather bowl S25, upper cover bowl lower sheath S11, upper seal The lower jacket S12, the upper seal pull-off pin S13, the upper seal Hou Ning pin S14, the upper seal lower joint S15, the upper seal limit gear S16 a...

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Abstract

The invention relates to a single-slip oil layer perforation sealing pipe string which mainly solves the problems that when the pipe strings of the prior art complete the chemical sealing and plugging operation construction to oil and water wells, because the pipe strings do not have the functions of positive stamping setting, rotation and sealing the injection hole, reverse stamping, deblocking by lifting, etc., the working efficiency is low. The pipe string is characterized in that the pipe string consists of a super packer, a medium packer and a subordinate packer connected with oil pipes; the pipe string actually meets the technical requirements of each procedure in the sealing and plugging operation under different pressure on the sliding bush of an underground packer by cooperating with different motions, such as rotation and lifting, wherein, the super and the medium packers have the functions of positive stamping setting and reverse stamping setting, and the subordinate packer has the functions of positive stamping setting, injection hole sleeve rotation and sealing, and reverse stamping setting. The pipe string is characterized by great improvement of the working efficiency of the oil and water well chemical sealing and plugging operation construction.

Description

Technical field: [0001] The invention relates to a pipe string used in the chemical plugging and channeling operations of oil-water wells in an oil field, in particular to a plugging pipe string for blast holes in a single stuck oil layer. Background technique: [0002] During the construction process of chemical plugging and channeling of oil and water wells in oilfields, the process strings in the prior art do not have the functions of positive pressure setting, rotary sealing of injection holes, reverse pressure, lifting and unsealing, etc., and the downhole tools can only perform one action. In addition, after the plugging string is released, the downhole string needs to be tested and sealed, but the process string in the prior art cannot be tested and sealed. The above-mentioned shortcomings of the existing process strings have greatly affected the work efficiency of the chemical plugging and channeling operations of the entire oil-water well. Invention content: [...

Claims

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Application Information

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IPC IPC(8): E21B33/122
Inventor 张树仁任龙佘庆东
Owner DAQING OILFIELD CO LTD
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