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Cable digital-type technology pipe column for dispersion under-pressure operation and method

A technology for working under pressure and process pipe strings, which is applied in drilling pipes, casings, earthwork drilling and mining, etc., and can solve problems such as difficult cable running and cable protection, so as to improve long-term application reliability, reduce on-site operation risks, The effect of simplifying the on-site work process

Pending Publication Date: 2019-03-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, to provide a process string and method for cable digital dispensing and pressure operation, which solves the problems of cable running difficulty and cable protection, and realizes cable digital The possibility of separate injection and pressurized operation finally realizes remote real-time monitoring of downhole stratification dynamic data, automatic measurement and adjustment of stratification flow, and improves quality and efficiency

Method used

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  • Cable digital-type technology pipe column for dispersion under-pressure operation and method
  • Cable digital-type technology pipe column for dispersion under-pressure operation and method
  • Cable digital-type technology pipe column for dispersion under-pressure operation and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as Figures 1 to 4 As shown, a process tubing string for cabled digital injection with pressure, including a male joint device 4 sequentially connected to the tubing from top to bottom, a first cable packer 5, a first cabled digital Water distributor 6, second cable packer 7, second cable digital water distributor 8, preset mandrel 9, double-acting valve 10, screen pipe 11, plug 12, fishing fish 13 and removable bridge The plug 14 also includes a female connector device 3 matched with the male connector device 4, the upper end of the female connector device 3 is connected with a female connector cable 1, and the other end of the female connector cable 1 extends to the wellhead, and the male connector device 4 is connected to the first process through the cable. The cable packer 5 , the first cabled digital water distributor 6 , the second cabled packer 7 and the second cabled digital water distributor 8 are electrically connected, and the female joint device 3 and ...

Embodiment 2

[0028] A method for working under pressure of a process string with cable digital split injection under pressure, comprising the following steps:

[0029] Step 1: Lower the removable bridge plug to 30-50m below the wellhead, throw the ball and pressurize at 16-18MPa, seal the removable bridge plug; continue to pressurize at 22MPa, lift the string and throw away;

[0030] Step 2: Connect the cabled digital dispensing tool string, the lower end of the male joint device and the first cabled packer, the first cabled digital water distributor, the second cabled packer and the second cabled digital water distributor The packer is connected with an armored cable, and then connected to the male joint device through the upper part of the first cable packer, and the salvage fish is connected below the plug at the bottom of the pipe string;

[0031] Step 3: Lower the tool string, salvage the fish and dock with the fishable bridge, seal the annular space of the oil sleeve according to the...

Embodiment 3

[0035] On the basis of Embodiment 1, the second cabled digital water distributor 8, the prefabricated mandrel 9, the double-acting valve 10, the screen pipe 11 and the plug 12 are screwed sequentially from top to bottom.

[0036] The upper end of the male joint device 4 is connected to the oil pipe, and the oil pipe at the lower end of the male joint device 4 is connected with the first cable packer 5, the first cabled digital water distributor 6, and the second cable packer sequentially from top to bottom. 7. The second cabled digital water distributor 8, preset working cylinder 9, double-acting valve 10, screen tube 11, plug 12, salvaged fish 13 and removable bridge plug 14, and the second cabled digital water distribution The lower end of the device 8 is connected with the upper end of the preset working cylinder 9 with a threaded thread, the lower end of the preset working cylinder 9 is connected with the upper end of the double-acting valve 10 with a threaded thread, the l...

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Abstract

The invention discloses a cable digital-type technology pipe column for dispersion under-pressure operation and a method. The pipe column comprises a male connector device, a first through-cable packer, a first cable digital-type water distributor, a second through-cable packer, a second cable digital-type water distributor, a pre-arranged working cylinder, a dual-effect valve, a screening pipe, apipe plug, a salvage fish and a taking-type bridge plug which are connected to an oil pipe from top to bottom in sequence and further comprises a female connector device matched with the male connector device. A female connector cable is connected to the upper end of the female connector device, the other end of the female connector cable extends to a well mouth, the male connector is electrically connected with the first through-cable packer, the first cable digital-type water distributor, the second through-cable packer and the second cable digital-type water distributor through cables, andthe female connector device is electrically connected with the male connection device. The male connector device is in butt joint with the female connector device, the cable of the well mouth is connected with the cable of the pipe column, pipe column equipment is monitored and controlled, and the situation is avoided that the cable winds the pipe column during construction and descends into thewell.

Description

technical field [0001] The invention belongs to the technical field of oil field produced water reinjection wells, and in particular relates to a process string and method for cabled digital separate injection with pressure operation. Background technique [0002] In the process of oilfield layered water injection development, when the well deviation is large, the resistance rate of measurement and adjustment of directional wells is high, the test instrument is frequently dropped, the seal of the packer is difficult to check, and the digitalization level of water injection is low. In order to save the cable test and deployment process, improve the digitalization level of water injection, realize the single-layer flow test and deployment of separate injection wells at the water injection station, and realize the real-time remote transmission of data such as flow, pressure, temperature, and packer sealing to the water injection station, Carried out research on cabled digital i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20E21B17/02
CPCE21B17/023E21B43/20
Inventor 胡改星于九政王守虎张随望杨玲智毕福伟王子建刘延青靳福广宋昭杰
Owner PETROCHINA CO LTD
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