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Double-piston hydraulic switch and application thereof

A hydraulic switch and double-piston technology, which is applied in the direction of mining fluid, wellbore/well components, earthwork drilling and production, etc., to achieve the effects of increased stability, continuous flow passage, and simple structure

Active Publication Date: 2014-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It adopts a double-opening design of a mechanism to provide a double-opening differential pressure sliding sleeve suitable for horizontal well sections, but the sliding sleeve does not adopt an anti-locking mechanism, and there is a risk of closing due to liquid impact after the switch is turned on

Method used

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  • Double-piston hydraulic switch and application thereof

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Embodiment 1

[0030] Such as figure 1 As shown, a kind of double-piston hydraulic switch of the present invention, from top to bottom successively comprises collar 1, center tube 2, upper piston 4, spring one 5, scissors one 8-1, scissors two 8-2, spring Two 9 and the lower piston 10 are connected to form; the central pipe 2 and the collar 1 are connected by a screw; the upper piston 4 and the lower piston 10 compress the spring one 5 and the spring two 9 respectively, and the upper piston 4 and the lower piston 10 are respectively formed by shears. Nail 1 8-1 and shear nail 2 8-2 are fixed on the tube wall of the central tube 2, and the upper piston 4 and the lower piston 10 respectively cover the upper sandblasting port 7-1 and the lower sandblasting port on the central tube 2 7-2. Between the upper piston 4 and the central tube 2, a cavity 1 is formed by O-ring 1 3-1 and O-ring 2 3-2, and there is an annular channel 1 between the upper sandblasting port 7-1 and the cavity 1 6-1. Betwe...

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Abstract

The invention relates to a double-piston hydraulic switch and an application thereof in the field of downhole operation tools for oil and gas wells. The double-piston hydraulic switch comprises a pair of pistons, and is arranged on a center pipe (2); a sand jet is arranged on the center pipe (2); the pistons are symmetrically arranged on the external surface of the center pipe (2) along the line of the center pipe; the pistons are fixedly arranged on the center pipe (2) through shear pins; the pistons are used for opening or closing the sand jet. By applying the double-piston hydraulic switch, a fracturing switch is opened under the action of pressure difference between inside and outside working on the pistons and elastic energy stored by springs, and moreover, the continuous turn-on of the switch can be kept; therefore the stability of opening a pipe column during the construction process is improved, and the normal implementation of construction and production is guaranteed; the double-piston hydraulic switch is simple in structure, safe, reliable, applicable for a staged fracturing acidizing treatment technology of a horizontal well, and can also be used for an injection-production technology.

Description

technical field [0001] The invention relates to a double-piston switch in the field of downhole operation tools for oil and gas wells, and furthermore, relates to a double-piston hydraulic switch, which is mainly used in the staged fracturing and acidizing well completion process of horizontal wells in the development process of oil and gas fields. It can also be applied to the injection-production process in the process of oil and gas field development. Background technique [0002] At present, the investment cost of fracturing technology in oil and gas fields is high, especially for staged fracturing and acidizing of horizontal wells. The stability of downhole operation tools is the key to ensure the smooth operation of downhole operations and improve the success rate. In the process of fracturing and completing horizontal wells, ball seat opening sliding sleeves and conventional differential pressure opening sliding sleeve switches are often used. The ball seat open type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B41/00E21B43/26
Inventor 柯文奇苏建政柴国兴薄启炜石在虹马玉生张汝生龙秋莲李萍杨丽红史爱萍唐萍
Owner CHINA PETROLEUM & CHEM CORP
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