A directional piercing tool and process for insoluble balls used to open sliding sleeves

An insoluble and high-tech technology, applied in the field of directional shooting tools and technology, can solve the problems of insoluble ball stuck and unable to flow back, and achieve the effect of good application effect, strong practicability and simple design

Active Publication Date: 2019-04-16
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a directional penetration tool and technology for insoluble balls used in opening sliding sleeves, which effectively solves the problem that the insoluble balls used in multi-stage pitching slip sleeves of fixed pipe strings are stuck and unable to flow back, and successfully opened up fracturing The connecting channel between the pipe string and the oil and gas reservoir improves the success rate and timeliness of oil and gas well drainage and production after fracturing

Method used

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  • A directional piercing tool and process for insoluble balls used to open sliding sleeves
  • A directional piercing tool and process for insoluble balls used to open sliding sleeves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 The structure diagram of the directional injection tool for the insoluble ball for opening the sliding sleeve of the present invention is shown. It includes a positioning block 6 and a nozzle 7. The nozzle 7 is connected to the bottom port of the positioning block 6 and the positioning block 6 is connected to one end of the nozzle 7. Positioning legs 9 are provided on the surrounding outer walls.

[0032] The positioning leg 9 is a cylindrical structure. The diameter of the cylinder is larger than the diameter of the bottom end of the positioning block 6, larger than the diameter of the insoluble ball to be processed, and smaller than the inner diameter of the pitching sleeve 10 that contains the insoluble ball to be processed, and is positioned One end of the leg 9 is a closed end, and the closed end of the positioning leg 9 is fixedly connected with the outer wall of the positioning block 6 to form an integrated structure. When the positioning block 6 is ...

Embodiment 2

[0039] A directional injection tool string with insoluble balls for opening the sliding sleeve, such as figure 2 As shown, it includes the coiled tubing 1, the outer slip connector 2, the variable buckle joint 3, the elastic centralizer 4, and the directional injection tool 5 connected in sequence from top to bottom.

[0040] The coiled tubing 1 and the outer slip connector 2 are directly connected by the outer slips. Here, the coiled tubing 1 and the outer slip connector 2 are not allowed to use threaded connection. The outer slip connector 2, the variable buckle joint 3, the elastic centralizer 4 and the directional injection tool 5 are all connected by threads, which is convenient for disassembly and replacement.

[0041] The parts and structures not described in detail in this embodiment, such as the coiled tubing 1, the outer slip connector 2, the variable buckle joint 3, and the elastic centralizer 4, are well-known parts and common structures in the industry, and only need ...

Embodiment 3

[0043] A directional shooting and penetration process of insoluble balls for opening a sliding sleeve, which includes the following steps:

[0044] Step 1. Install the directional injection tool with nozzle 7 on the ground;

[0045] Step 2. Connect the coiled tubing 1, the outer slip connector 2, the variable buckle connector 3, the elastic centralizer 4, and the directional injection tool 5 from top to bottom to form a directional injection tool string;

[0046] Step 3. Lower the directional injection tool string formed by the connection in step 2 to the predetermined well depth position;

[0047] Step 4. After entering the predetermined well depth position, start the pump truck of coiled tubing 1 and circulate with a displacement of 400~500L / min. After the circulation is stable, the displacement will be increased to 800~1000L / min, and the sand concentration will be 100~120kg / m 3 The sand-carrying liquid passes through the nozzle 7 of the directional injection tool to form a high-sp...

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Abstract

The invention relates to the field of oil and gas well improvement, in particular to an indissolvable ball directional shooting-through tool and process for opening sliding sleeve. The tool comprises a positioning block and a nozzle. The nozzle is connected to the bottom end opening of the positioning block. Positioning landing legs are arranged on the circumferential outer wall of the end, connected with the nozzle, of the positioning block. A coiled tubing is used for driving the directional shooting-through tool to advance to the position of the ball injection sliding sleeve, directional shooting-through of an indissolvable ball is achieved through high-speed jet flow of perforation sand-carrying fluid at the nozzle, the problem that the indissolvable ball is stuck and cannot flowback and consequently a fracturing string cannot communicate with oil and gas reservoirs is solved, and the success rate and timeliness of oil and gas well cleanup and require production after fracturing are increased; and the design is simple, the process is convenient to operate, the field application effect is good, the practicability is high, and the success rate and timeliness of oil and gas well cleanup and require production after fracturing are increased.

Description

Technical field [0001] The invention relates to the field of reformation of oil and gas wells, in particular to a directional injection tool and process for insoluble balls for opening the sliding sleeve in the multi-stage ball throwing and sliding sleeve fracturing process of immovable pipe strings. Background technique [0002] In recent years, many oil and gas wells in Changqing Oilfield are planning to use multi-stage hydraulic perforating with fixed pipe string for staged fracturing with sliding sleeves, multistage hydraulic perforating with fixed string, and staged fracturing with sliding sleeves for mechanical stratified pitching. Tubing string construction methods such as open hole packer ball throwing, sliding sleeve segmented fracturing, etc., are integrated operations of segmented transformation, oil testing, and well completion. Although these pipe string methods improve the efficiency of oil and gas well reconstruction, reduce the frequency and labor intensity of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B29/00
CPCE21B29/00
Inventor 仝少凯王祖文岳艳芳白明伟温亚魁杨红斌林勇
Owner BC P INC CHINA NAT PETROLEUM CORP
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