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Hydraulic adjustable time delay trepanning device

A technology of hydraulic pressure and hydraulic cavity, which is applied in the field of hydraulic adjustable time-delay opening device, and can solve the problems such as delay cannot be realized

Active Publication Date: 2019-08-02
WUHUA ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is: aiming at the problem that the current perforating devices for perforating oil and gas wells are all instantaneous perforation, and cannot be delayed for a certain period of time

Method used

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  • Hydraulic adjustable time delay trepanning device
  • Hydraulic adjustable time delay trepanning device
  • Hydraulic adjustable time delay trepanning device

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Embodiment Construction

[0023] see figure 1 — Figure 6 , a hydraulically adjustable time-delay opening device. The device consists of an upper body 1, a sealing ring 2, a piston ring 3, a pin 4, an upper hydraulic chamber 5, a sliding sleeve 6, a sealing ring 7, a pressure hole 8, and a time-delay hole. 9. The lower hydraulic chamber 10, the flow hole 11, the lower body 12, the sealing ring 13, the sealing ring 14, the sealing ring 15, the sealing ring 16, etc. This device is used in the perforation string of oil and gas wells, and is applied in the construction of oil and gas wells In the process, the function of delayed perforation required in the perforation construction process is realized.

[0024] The upper body 1 and the lower body 12 are connected by a threaded sealing structure, and the sliding sleeve 6 is fixedly assembled with the piston ring 3 through the pin 4 , and then integrally assembled in the center of the upper body 1 and the lower body 12 . Upper hydraulic chamber 5 dresses hy...

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Abstract

The invention discloses a hydraulic adjustable time delay trepanning device and is applied to a perforation construction process needing to achieve trepanning after delaying for a certain time. According to the device, two independently sealed hydraulic cavities are designed, under the pushing action of hydraulic pressure in a central pipe, liquid in the upper hydraulic cavity flows towards the lower hydraulic cavity through a time delay hole, the purpose of hole opening in a time delay mode is achieved, meanwhile, the diameter of the time delay hole of the device can be set in the machining process, and the time delay length can be adjusted; on the other hand, when the device is assembled, the liquid amount of the upper hydraulic cavity can be adjusted in the delay length. The trepanningfunction of the device achieves circulation between the interior of an oil pipe and the annulus of an oil and gas well.

Description

technical field [0001] The invention belongs to the field of oil and gas well completion perforation operations, in particular to the technology for realizing the communication between the oil pipe and the annular casing in the oil and gas well perforation technology, and particularly relates to a hydraulically adjustable time-delay perforating device. Background technique [0002] The hydraulic perforating device is a device often used in perforating oil and gas wells. This device realizes the perforating gun string transported by the tubing to open holes during underground construction, and completes the opening of the circulation channel between the tubing and the annular casing, realizing Technological requirements for opening holes in perforation construction. For conventional perforation construction, the purpose of perforation is realized instantly after the oil pipe is pressurized. For the pressure value, the perforation and other processes are completed first, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/18
CPCE21B7/18
Inventor 刘正彦肖勇常昕张虎刘帅王雪艳罗兴平闵杰
Owner WUHUA ENERGY TECH CO LTD
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