Releasing gadget sealing insertion head gas-injection tube pile
A gas injection pipe and hands-off technology, applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problems of high application cost, polluted oil layers, hidden safety hazards, etc., achieve simple operation procedures, prevent oil layer pollution, Effects on job safety
Inactive Publication Date: 2008-12-10
OIL EXTRACTION TECH INST OF SINOPEC SHENGLI OILFIELD
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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
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[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 butterfly valve controller 4 includes a connecting sleeve 49 and a sealing joint 410 connected to the lower end of the connecting sleeve, a valve seat 42 installed in the upper end, an "L" shaped sealing body 44 and an upper joint 41, and a butterfly valve installed on the valve...
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The invention discloses a hand-free air injection string, which includes a working cylinder, a packer, a constant pressure ball valve, a screen pipe and a plug, and also includes a sealing plug for sequentially connecting the lower end of the working cylinder and the upper end of the packer. 1. Hands-off return barrel and butterfly valve controller, the lower end of the packer is connected with a constant pressure ball valve, a screen pipe and a wire plug in sequence. The invention has the functions of convenient, reliable, safe and on-demand closing or connecting the oil pipe, and is applied in the gas injection process of oil exploitation.
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...
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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