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Ground Simulation Method for Isolation Jet Tool Applicable to Multi-Stage Hydraulic Jet Fracturing

A technology of hydraulic jetting and ground simulation, applied in the directions of sealing/packing, earth-moving drilling, wellbore/well components, etc., can solve the problems of increasing labor intensity, prolonging construction period, increasing the number of tool replacements, etc., and reducing replacement The number of tools, the reduction of well control safety risks, and the effect of reducing labor intensity

Active Publication Date: 2015-12-23
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no ground simulation test method for the multi-stage hydraulic jet isolation tool, which leads to the inability to correctly obtain the sealing performance of the isolation tool. Therefore, the number of tripping and replacement tools will increase, which increases the labor cost. strength, prolonging the construction period, and correspondingly increasing well control safety risks

Method used

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  • Ground Simulation Method for Isolation Jet Tool Applicable to Multi-Stage Hydraulic Jet Fracturing
  • Ground Simulation Method for Isolation Jet Tool Applicable to Multi-Stage Hydraulic Jet Fracturing
  • Ground Simulation Method for Isolation Jet Tool Applicable to Multi-Stage Hydraulic Jet Fracturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The purpose of this invention is to detect whether the packer and injection tool can run smoothly, that is, under the set pressure, whether the steel ball can be successfully knocked out of the sliding sleeve, and whether the steel ball will push the sliding sleeve after the sliding sleeve is knocked out. The sliding sleeve continues to pass through the center pipe of the packer and smoothly enters the seating joint connected under the packer. After the sliding sleeve leaves the spray gun, can the water eye of the spray gun spray water? After the steel ball reaches the seating joint, whether the water eye of the spray gun continues to spray water normally? , while the water outlet at the connector port stops. In order to achieve this purpose, the tools for connecting the pipe strings on the ground simulation test include: according to the design needs to implement the stages of hydraulic jet fracturing, set the wellhead as the upward direction, each stage needs to connec...

Embodiment 2

[0062] This embodiment is basically the same as Embodiment 1, the main difference is:

[0063] Before the ground simulation, the sealing test is carried out on the isolation injection tool, and the sealing test specifically includes the following steps:

[0064] Step 1: Test the pressure with clean water to 50MPa, stabilize the pressure for 20 minutes, no leakage, no pressure drop, it is qualified;

[0065] Step 2: After immersing in diesel oil at 120°C for 6 hours, test the pressure at 50MPa, test the upper pressure at 50MPa under the rated setting pressure, and stabilize the pressure for 20 minutes. If there is no leakage and no pressure drop, it is qualified;

[0066] Step 3: Then install only the upper three sealing rings on the sliding sleeve, install them into the spray gun body, pressurize 3MPa, check whether the packer is set, if it is normally set, continue to pressurize to 35MPa, and stabilize the pressure for 5 minutes , no leakage is qualified;

[0067] Step 4: I...

Embodiment 3

[0071] This embodiment is basically the same as Embodiment 2, the main difference is that the sealing test specifically includes the following steps:

[0072] a. First test the pressure with clean water to 40MPa, and stabilize the pressure for 10 minutes;

[0073] b. After immersing in diesel oil at 100°C for 7 hours, test the pressure to 40MPa, test the upper pressure to 50MPa under the rated setting pressure, and stabilize the pressure for 10min;

[0074] c. Install the upper three sealing rings on the sliding sleeve, then install the sliding sleeve into the spray gun body, pressurize at 5MPa, check whether the packer is set, if it is normally set, continue to pressurize to 40MPa, and stabilize the pressure for 7 minutes ;

[0075] d. Install four sealing rings on the sliding sleeve, install the sliding sleeve into the spray gun body again, pressurize 40MPa, and stabilize the pressure for 7 minutes;

[0076] e. Put steel balls from the upper end of the hydraulic jet sealing ...

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Abstract

The invention discloses a jet packer ground simulation method applicable to multilevel hydraulic jet fracturing. The method comprises the following steps: a, connecting in series jet packers of corresponding amount and other required tools on a construction test string according to the required designed level amount of an oil well and a gas well, placing a steel ball in an inlet of the construction test string, and connecting a high-pressure pipeline; b, gradually increasing the discharge capacity, if a sliding sleeve is hit off by the steel ball and pushed to pass through a central pipe of the packer continually and enter a sliding sleeve standing joint connected onto the lower part of the packer, and a water hole of a spray gun normally jets water, performing next-level test for the jet packer; c, if the sliding sleeve is not hit off by the steel ball, checking the mounting position of the sliding sleeve and the gap between the sliding sleeve and the spray gun, checking the position of a shear pin, and performing the test and detection in step b; and repeating steps a, b and c until completing all set tests. With adoption of the method, opening of all packers and jet tools, and jet of the spray gun can be observed.

Description

technical field [0001] The invention relates to a ground simulation method for an isolation jet tool suitable for multi-stage hydraulic jet fracturing, which is used for well completion stimulation measures in the oil and gas drilling process, and relates to the technical field of ground detection of acid fracturing tools. Background technique [0002] Hydrojet segmental modification is the product of the combination of hydrojet and fracturing technology, involving perforation and fracturing stimulation measures; one string can be used to realize multi-stage construction in horizontal wells, and it can be used in open holes, cement-consolidated casings, and unconsolidated casings. Fracturing is carried out under various completion methods such as knotted screen pipes, and the construction efficiency can be greatly improved. [0003] Among the prior art, the following patent applications are related to packer technology: [0004] The publication number is CN102650202A, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/117E21B43/26E21B33/12
Inventor 邓小强张波陈万林韩虎成许建伟张文杨文明张海涛柳瑞军张敏
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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