Continuous layered fracturing ball injector and control method thereof

A technology of layered fracturing and ball-throwing device, which is applied in earth-moving drilling, production of fluids, wellbore/well components, etc., can solve the problems of long blocking ball throwing time, affecting work efficiency, high-pressure risk, etc., and reducing throwing time, improve work efficiency, and reduce the risk of high-pressure shot blocking the effect of the ball

Inactive Publication Date: 2015-07-22
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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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 overcome the problems that the operator faces high pressure risk when throwing the plugging ball in the existing continuous layered fracturing construction process, and the time for throwing the plugging ball is long, which affects work efficiency

Method used

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  • Continuous layered fracturing ball injector and control method thereof
  • Continuous layered fracturing ball injector and control method thereof
  • Continuous layered fracturing ball injector and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In order to overcome the problems that the operator faces high pressure risk and takes a long time to throw the ball during the existing continuous layer fracturing construction process, which affects the work efficiency, this embodiment provides a method such as figure 1 The continuous layered fracturing ball pitcher shown includes a casing 18, a high-pressure ball storage cylinder 9 is arranged inside the casing 18, and an arc-shaped volleyball plate 10 is obliquely arranged in the inner cavity of the high-pressure ball storage cylinder 9. In the space formed between the upper surface of the arc-shaped volleyball board 10 and the wall of the high-pressure ball storage cylinder 9, a plurality of plugging balls 8 whose diameters gradually increase are stacked from bottom to top, and the lower end of the arc-shaped volleyball board 10 is connected with the high-pressure storage ball A feeding port is formed between the cylinder walls of the cylinder 9, and a reciprocating...

Embodiment 2

[0037] On the basis of embodiment 1, in order to operate conveniently, described remote controller 16 comprises PLC controller, power supply and operation box panel; Described operation box panel is provided with display screen, power switch, throws and blocks the ball button, Indicator light, reset switch and safety switch; in this way, the operator can operate from a long distance without getting close to the pitcher, which realizes safe production.

[0038] The steel wire 4 is a 1.0mm stainless steel wire.

[0039] A sealing ring 1 is provided between the roller shaft 19 and the first thrust bearing 2 ; a sealing ring 2 14 is provided between the rotating rod 12 and the second thrust bearing 13 .

[0040] The diameters of the stacked plurality of plugging balls 8 form an arithmetic sequence from bottom to top, and the diameters of the plugging balls 8 thrown can be any one or several of the arithmetic sequence during use.

[0041] In this embodiment, the number of plugging b...

Embodiment 3

[0053] On the basis of Embodiment 1, this embodiment provides a method for controlling a continuous layered fracturing ball launcher, including the following steps:

[0054] 1) The remote controller 16 controls the rotation of the stepper motor 15 to drive the reciprocating rod 11 to move, so that the size of the opening formed between the lower end of the arc-shaped volleyball plate 10 and the wall of the high-pressure ball storage cylinder 9 reaches the minimum position, that is, the initial position;

[0055] 2) The plugging balls 8 to be put into the well are loaded into the high-pressure ball storage cylinder 9 in the order of diameter from small to large;

[0056] 3) store the diameter of each blocking ball 8 in the remote controller 16;

[0057] 4) Hoist the assembled continuous layered fracturing ball launcher on the top of the wellhead, and connect it to the wellhead through the flange 7;

[0058] 5) start throwing blocking ball; Remote controller 16 controls stepper...

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Abstract

The invention specifically provides a continuous layered fracturing ball injector which comprises a shell. A high-pressure ball storage barrel is arranged in the shell, an arc ball arranging plate is obliquely arranged in an inner cavity of the high-pressure ball storage barrel, a plurality of plugging balls are stacked between the upper surface of the arc ball arranging plate and the wall of the high-pressure ball storage barrel, a reciprocating rod is hinged to the lower end of the arc ball arranging plate and connected with a rotating rod, the rotating rod is connected with a stepping motor outside the shell, the stepping motor is electrically connected with a remote controller, a detection block, a steel wire, a wheel and a wheel shaft are arranged on the upper portion of the high-pressure ball storage barrel, the detection block is connected to the wheel through the steel wire, the wheel is arranged on the wheel shaft, the wheel shaft is arranged on the inner wall of the high-pressure ball storage barrel and extends to the shell through a first thrust bearing installed on the wheel shaft, a reset rotary knob is arranged at one end of the wheel shaft, one end of the wheel shaft is connected with an angle sensor, and the angle sensor is connected with the remote controller through a signal line. By means of the continuous layered fracturing ball injector, the plugging balls are automatically injected and can be accurately injected in a remote control mode, the injecting time is shortened, and the working efficiency is improved.

Description

technical field [0001] The invention relates to oil and gas field exploration and development equipment, in particular to a continuous layered fracturing ball thrower and a control method thereof, which are used for continuous layered fracturing construction without moving pipe strings. Background technique [0002] When multiple oil and gas layers need to be developed in an oil and gas well, in order to speed up the fracturing development speed, layered fracturing without moving strings is often used. When fracturing in layers without moving the string, each layer (segment) should be isolated with a packer. In the way of sleeves, the channel to enter the new layer is opened, and the channel to the layer that has been depressed is blocked at the same time, so as to realize the fracturing of the new layer. Continuous layered fracturing means that during the fracturing construction process, when the fracturing fluid is continuously injected by the non-stop pump, plugging ball...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B23/00
CPCE21B23/00E21B43/26
Inventor 孙虎李尊团邓继学王祖文米虎宁樊炜樊启国刘培润韩静静韩蓉张晓祥任斌
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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