Secondary well cementing technique and secondary well cementing device by liner pipe

A cementing and lining technology, which is applied to the valve device, drilling pipe, casing and other directions of the wellbore/well, can solve the problems of complex operation, low reliability and high cost of process equipment, and achieves simple process and high reliability. 、Ensure the effect of cementing quality

Active Publication Date: 2015-09-02
中国石油化工股份有限公司华东油气分公司泰州采油厂
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Problems solved by technology

The traditional process is to use the hydraulic hanger to match the casing shoe to realize the purpose of liner delivery and cementing. This process has the disadvantages of high cost of process equipment, complicated operation, and low reliability.

Method used

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  • Secondary well cementing technique and secondary well cementing device by liner pipe
  • Secondary well cementing technique and secondary well cementing device by liner pipe
  • Secondary well cementing technique and secondary well cementing device by liner pipe

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Embodiment

[0043] like figure 1 , figure 2 , image 3 , Figure 4 As shown, the present invention provides a liner secondary cementing device, which is mainly composed of a delivery pipe string, an inner pipe string and an outer pipe string arranged inside the casing 2 . The delivery string is mainly composed of the upper joint of the hand-off joint and the lower joint of the hand-out joint connected with the oil pipe I thread, and the upper joint of the hand-out joint is connected with the lower joint of the hand-out joint through the left-hand thread.

[0044] The inner tubing string is mainly composed of a tubing pup joint, a tubing length compensator, tubing II and an intubation tube which are sequentially connected with the threaded joint of the upper joint of the drop-off joint.

[0045] The outer pipe string is mainly composed of a liner, an intubation cementing valve and a sawtooth screen that are sequentially connected with the lower joint of the drop joint.

[004...

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Abstract

The invention discloses a secondary well cementing technique and a secondary well cementing device by a liner pipe. The secondary well cementing device mainly comprises a conveying pipe string, an inner string and an outer string, wherein the conveying string mainly comprises an upper release sub body and a lower release sub body which are in screwed connection with a tubing I, the inner string mainly comprises a tubing nipple, a tubing length compensator, a tubing II and an inserting pipe which are in screwed connection with the upper release sub body sequentially, and the outer string mainly comprises the liner pipe, an inserting pipe well cementing valve and a zigzag screen pipe which are in screwed connection with the lower release sub body sequentially. The secondary well cementing technique adopting the secondary well cementing device includes the steps of determining a well cementing segment, placing the outer string and the inner string in the well cementing segment, performing pumping injection, boosting, using workover fluid for washing a well bore, injecting cement for well cementation, backwashing a well and the like. The secondary well cementing device has the advantages of reasonable structural design, wide application range, high reliability, high sealability, simple technology and capabilities of guaranteeing well cementing quality, substantially improving operation efficiency and substantially reducing construction cost.

Description

Technical field [0001] The present invention involves a secondary well -fixed -fixing process method and installation of a lining tube, which belongs to the field of oil and gas wells and well -finishing technology. Background technique [0002] A long section of loser treatment problems often occur in oilfield development. One of the governance measures that thoroughly solve the problem is to use the secondary fixing technology of the long well lining tube.The traditional process is to use the hydraulic suspension supporting sleeve floating shoes to achieve the purpose of throwing off and fixing the lining tube. This process has shortcomings such as high cost, complex operation, and low reliability.In view of this invention of a secondary well -solid -fixed -fixing process method and installation of traditional process technology, it has very important social and economic significance. Invention content [0003] The purpose of the present invention is to overcome the lack of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21B17/00E21B17/02E21B34/14
Inventor 杜长全樊开赟夏苏江李哲东沈文清龚明峰
Owner 中国石油化工股份有限公司华东油气分公司泰州采油厂
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