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Oil-water well perforating gun pulling device operating under pressure

A technology of pressurized operation and perforating gun, which is applied in wellbore/well components, production fluid, earth-moving drilling, etc., can solve problems such as affecting safe production, serious environmental pollution of wellhead operation, etc., and achieve the effect of avoiding blowout operation

Inactive Publication Date: 2015-04-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a perforating gun for lifting perforating operation under pressure in order to overcome the defects of serious wellhead operation environment pollution and affecting safe production in the construction of the lifting perforating operation string in the prior art body device

Method used

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  • Oil-water well perforating gun pulling device operating under pressure
  • Oil-water well perforating gun pulling device operating under pressure

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specific Embodiment approach

[0012] Depend on figure 1 , figure 2 It can be seen that the present invention consists of a lifting head 1 and a blowout prevention cylinder 2. The lower part of the blowout prevention cylinder 2 is a slip, and the slips include a slip seat 3 and a slip tooth 4. The inner pipe wall of the slip seat 3 has at least Two inverted tapered slots 5, the slip teeth 4 are placed in the slots 5, and a rotating bearing 6 is installed between the upper part of the blowout prevention cylinder 2 and the lifting head 1.

[0013] The lifting head 1 is a "convex" shape structure; the upper end surface of the blowout prevention cylinder 2 is provided with a hollow hole that fits with the lifting rod of the lifting head 1; the upper end of the blowout prevention cylinder 2 is lapped on the lifting head through a rotating bearing 6 1 on the lower deck.

[0014] The upper end of the blowout prevention cylinder 1 is fixedly equipped with a plug 7, and the upper part of the plug 7 is lapped on t...

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Abstract

The invention discloses an oil-water well perforating gun pulling device operating under pressure and belongs to the technical field of special oilfield borehole operation devices. The device comprises a lifting head and a blowout control barrel, wherein a slip is arranged at the lower part of the blowout control barrel; the slip comprises a slip bowl and slip inserts; at least two inverted cone-shaped clamping grooves are formed in the inner tube wall of the slip bowl; the slip inserts are arranged in the clamping grooves; and a rotating bearing is arranged between the upper part of the blowout control barrel and the lifting head. The device provided by the invention cooperates with equipment operating under pressure, a perforating gun body is clamped by the slip at the lower part of the blowout control barrel, and the rotating bearing is mounted between the lifting head and the blowout control barrel so that the lifting head and the blowout control barrel rotate relative to each other to achieve the purpose of pulling out a perforating operation tubular column and the perforating gun body separately during operation construction under pressure, avoid blowout operation and realize safety production.

Description

technical field [0001] The invention discloses a perforating gun device for oil-water well operation under pressure, and belongs to the technical field of special devices for downhole operation in oil fields. Background technique [0002] In oil field production, in order to connect the oil layer and the wellbore, it is necessary to use the perforating gun to perforate the casing and the oil layer. After perforating the oil-water well, due to the pressure at the wellhead, it is necessary to take well killing measures or direct blowout operation. There are great potential safety hazards in blowout operations; well killing measures are likely to cause formation pollution, affect oil well production, and increase water injection pump pressure. In the prior art, under the condition of not snubbing, the downhole pipe string and the perforating gun body for perforating operation are generally lifted by snubbing equipment, because after the perforating gun completes the perforatin...

Claims

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Application Information

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IPC IPC(8): E21B43/116
CPCE21B23/00
Inventor 王春浦王卫国霍隆太王宪良郭强初振华郑文照
Owner CHINA PETROLEUM & CHEM CORP
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