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Intermediate connector device for multistage ignition perforating

A technology of intermediate joints and wiring devices, which is applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems such as the inability to meet the requirements of multiple firing perforation wiring, and achieve good isolation and sealing effects.

Inactive Publication Date: 2014-01-01
WELL LOGGING OF CNPC CHUANQING DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the existing common perforating gun joints represented by the above-mentioned patent documents cannot meet the requirements of multi-firing perforation wiring.

Method used

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  • Intermediate connector device for multistage ignition perforating
  • Intermediate connector device for multistage ignition perforating
  • Intermediate connector device for multistage ignition perforating

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Embodiment Construction

[0031] Refer to the attached Figure 1-4 , the best embodiment of the present invention is: comprising an interstage isolating device and a bypass wiring device connected to the interstage isolating device;

[0032] The interstage isolation device includes an intermediate joint 4, an isolation mandrel 3 and a pressure cap 2, wherein one end of the intermediate joint 4 is used to connect with the upper perforating gun, which is the left end in the figure, and the other end of the intermediate joint 4 is used to connect with the upper perforating gun. Open the wiring device to connect, which is the right end in the figure, and both ends are processed with external threads. There are through stepped holes in the intermediate joint 4, and there are four stepped holes from the left end to the right end. The inner wall of the first step hole is provided with an internal thread, the isolation mandrel 3 is located in the second step hole, and an internal thread hole matching the pres...

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PUM

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Abstract

The invention discloses an intermediate connector device for multistage ignition perforating. The intermediate connector device comprises an interstage isolator and a side junction device connected with the same. The interstage isolator comprises an intermediate connector, an isolating spindle and a gland. One end of the intermediate connector is used for being connected to an upper-stage perforating gun, and the other end of the intermediate connector is used for being connected to the side junction device. The intermediate connector is provided with a through stepped hole. The isolating spindle is disposed inside the stepped hole. The intermediate connector is provided with an inner threaded hole fitting the gland. The gland and the inner threaded hole fit so that the isolating spindle is pressed to a step of the stepped hole. The intermediate connector device has the advantages that signals of detection, ignition and the like can be transmitted among the multiple stages of ignition perforation; after the previous stage of ignition and initiating perforation, subsequent tools and devices to be used for ignition perforation are isolated and sealed; the problem that the common perforating gun connector is unable to meet the junction requirements is overcome, and the sealing requirements of descent strings can be met.

Description

[0001] technical field [0002] The invention relates to an intermediate joint device for multi-stage ignition perforation, which is suitable for a cable perforating pipe string to go down the well at one time to implement multiple perforation operations. Background technique [0003] Wireline perforating operations often require multiple ignition perforations in one trip. At present, the commonly used multiple ignition system in one trip uses selective firing control blocks for selective firing control. Each selective firing control block has 5 connecting wires that need to be connected. [0004] The publication number is CN2511790, and the Chinese patent literature published on September 18, 2002 discloses a perforating interlayer gun isolation explosion transmission device installed on the perforating interlayer gun used in the oil and gas well exploitation process. The structure of this patent is composed of a joint between the guns and a detonation transfer device; the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/119E21B43/1185
Inventor 唐凯欧跃强王海陈锋陈华彬王海东张清彬代传刚
Owner WELL LOGGING OF CNPC CHUANQING DRILLING ENG
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