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Leak test method for hydrojet containment tools

A technology of hydraulic jetting and sealing test, which is applied in the direction of using liquid/vacuum degree for liquid tightness measurement and measuring the fluid's acceleration and deceleration rate. problems such as large, prolonged construction period, etc., to achieve the effect of easier operation of sealing test, reduction of tripping and changing of tools, and reduction of labor intensity

Active Publication Date: 2015-12-23
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

However, in the prior art, there is no method for performing a sealing test on the hydraulic jet pack-off tool, resulting in the inability to correctly obtain the seal performance of the pack-off tool. Therefore, the number of trips to replace the tool will increase, increasing the labor intensity and prolonging the working life of the pack-off tool. The construction period is shortened, and the well control safety risk is correspondingly increased

Method used

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  • Leak test method for hydrojet containment tools
  • Leak test method for hydrojet containment tools
  • Leak test method for hydrojet containment tools

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A sealing test method suitable for hydrojet sealing tools, comprising the following steps:

[0045] Step 1: Test the pressure with clean water to 50MPa, stabilize the pressure for 20 minutes, no leakage, no pressure drop, it is qualified;

[0046] 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;

[0047] 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;

[0048] Step 4: Install all four sealing rings on the sliding sleeve, install them into the spray gun body again, pressurize at 35MPa, stabilize the pressure for 5 minutes, n...

Embodiment 2

[0052] A sealing test method suitable for hydrojet sealing tools, comprising the following steps:

[0053] a. First test the pressure with clean water to 40MPa, and stabilize the pressure for 10 minutes;

[0054] b. After immersing in diesel oil at 100℃ 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;

[0055] 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 ;

[0056] 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;

[0057] e. Put steel balls from the upper end of the hydraulic jet sealing tool, and then connect the pump to pry the injectio...

Embodiment 3

[0060] A sealing test method suitable for hydrojet sealing tools, comprising the following steps:

[0061] a. First test the pressure with clean water to 45MPa, and stabilize the pressure for 15 minutes;

[0062] b. After immersing in diesel oil at 110°C for 4 hours, test the pressure at 45MPa, test the upper pressure at 50MPa under the rated setting pressure, and stabilize the pressure for 10-20min;

[0063] c. Install the upper three sealing rings on the sliding sleeve, then install the sliding sleeve into the spray gun body, pressurize at 2MPa, check whether the packer is set, if it is normally set, continue to pressurize to 30MPa, and stabilize the pressure for 4min ;

[0064] d. Install four sealing rings on the sliding sleeve, install the sliding sleeve into the spray gun body again, pressurize 30MPa, and stabilize the pressure for 4 minutes;

[0065] e. Put steel balls from the upper end of the hydraulic jet sealing tool, and then connect the pump to pry the injection...

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Abstract

The invention discloses a seal test method applicable to a hydraulic jet sealing and separating tool. The seal test method comprises the following steps of: testing pressure of clear water to 50MPa, and stabilizing the pressure for 20minutes; then soaking for 6 hours in diesel oil at the temperature of 120 DEG C, then testing the pressure to 50MPa, testing upper pressure to 50MPa under rated setting pressure, and stabilizing the pressure for 20minutes; mounting three sealing rings at the upper part of a sliding sleeve, pressurizing to 3MPa, checking whether a packer is set or not, if the packer is normally set, continuously pressurizing to 35MPa, and stabilizing the pressure for 5minutes; and mounting four sealing rings on the sliding sleeve, pressurizing to 35MPa, and stabilizing the pressure for 5minutes; and throwing steel balls from the upper end, prying and injecting the steel balls into a pipeline by connecting a pump at the upper end, turning on the pump and building the pressure to 9MPa, so that the sliding sleeve drops and is inserted into a sliding sleeve locating joint at the lower end, a nozzle at the upper end discharges a liquid, a channel at the lower end is plugged, and a liquid flow stops. By adopting the seal test method applicable to the hydraulic jet sealing and separating tool, opening and sealing of the packer and a jet tool can be visually reflected, and the sealing effect of jetting a sealing and separating tool is achieved.

Description

technical field [0001] The invention relates to a sealing test method suitable for a hydraulic jet packing tool, 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 acidizing 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 the Chinese patent document publish...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/02G01M3/26
Inventor 邓小强张波杨文明张海涛韩虎成许建伟张文陈万林黄智勇樊炜
Owner BC P INC CHINA NAT PETROLEUM CORP
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