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Releasing gadget sealing insertion head gas-injection tube pile

A gas injection pipe and hand-throwing technology, which is applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of high application cost, polluted oil layers, hidden safety hazards, etc., and achieves simple operation procedures, prevention of oil layer pollution, The effect of work safety

Inactive Publication Date: 2006-06-28
OIL EXTRACTION TECH INST OF SINOPEC SHENGLI OILFIELD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing gas injection strings for oil production generally use conventional oil production strings or inlet strings, but they all have their own shortcomings or deficiencies: ① The inlet string uses a permanent packer, which cannot be taken out but can only be drilled out. High cost; ② Domestic pipe strings have poor air tightness and low pressure resistance, only 10-15Mpa; ③ Domestic pipe strings do not have downhole blowout preventers, and the well must be killed when the pipe string is pulled up. The process is complicated and the oil layer is polluted. Well overflow or blowout occurs, causing environmental pollution and potential safety hazards

Method used

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  • Releasing gadget sealing insertion head gas-injection tube pile
  • Releasing gadget sealing insertion head gas-injection tube pile
  • Releasing gadget sealing insertion head gas-injection tube pile

Examples

Experimental program
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Effect test

Embodiment Construction

[0014] refer to Figure 1-Figure 3 , a tracheal injection string with hands-off tight insertion, including a mandrel 1, a packer 5, a constant pressure ball valve 6, a screen pipe 7 and a plug 8, and also includes the lower end of the mandrel 1 and the upper end of the packer 5 in sequence The connected sealing plug 2, the throw-back sleeve 3 and the disc valve controller 4, and the lower end of the packer 5 are connected with a constant pressure ball valve 6, a screen pipe 7 and a plug 8 in sequence.

[0015] The sealing plug 2 includes a sealing seat 24 and a retaining ring 23 installed thereon, a sealing body 22 and an upper joint 21 , and a close-fitting guide rod 25 connected to the other end. The disc valve controller 4 includes a connecting sleeve 49 and a sealing joint 410 connected to its lower end, a valve seat 42 installed in the upper end, an "L" shaped sealing body 44 and an upper joint 41, and a disc valve plate 46 installed on the valve seat 42 And torsion spri...

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PUM

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Abstract

The invention discloses a throw-out seal-inserted air injection tubular column, comprising working cylinder, packer, level pressure ball valve, sieve tube and thread stopper, and also comprising seal plug, throwing hand recovery cylinder and disc valve controller connected in turn at the lower end of the working cylinder as well as at the upper end of the packer, and the lower end of the packer is connected with level pressure ball valve, sieve tube and thread stopper. The invention is convenient, reliable and safe, and has a function of closing or opening according to need, and applies to air injection process of petroleum producing.

Description

1. Technical field [0001] The invention relates to an oil production downhole pipe string, in particular to a hands-free and densely inserted gas injection pipe string. 2. Background technology [0002] The existing gas injection strings for oil production generally use conventional oil production strings or inlet strings, but they all have their own shortcomings or deficiencies: ① The inlet string uses a permanent packer, which cannot be taken out but can only be drilled out. High cost; ② Domestic pipe strings have poor air tightness and low pressure resistance, only 10-15Mpa; ③ Domestic pipe strings do not have downhole blowout preventers, and the well must be killed when the pipe string is pulled up. The process is complicated and the oil layer is polluted. Well overflow or blowout occurs, causing environmental pollution and potential safety hazards. 3. Contents of the invention [0003] The object of the present invention is to provide a kind of hand-free densely inse...

Claims

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Application Information

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IPC IPC(8): E21B43/16
Inventor 郭海萱张全胜蔡庆俊唐高峰
Owner OIL EXTRACTION TECH INST OF SINOPEC SHENGLI OILFIELD
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