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Wellhead ball catcher and ball catch method for staged fracturing of shale gas

A technology for staged fracturing and shale gas, which is applied in earth-moving drilling, wellbore/well components, and production fluids. , to achieve a simple effect

Inactive Publication Date: 2021-07-20
TONGREN POLYTECHNIC COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After the existing wellhead ball catcher catches the ball, its catch space and ball storage space need to be replaced manually. Therefore, the staff must always observe the capture of the fracturing ball, and manually switch the valve switch mechanism in time. If the valve is not switched in time switch, the frac ball will block the wellhead ball catcher under pressure, causing a huge safety hazard

Method used

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  • Wellhead ball catcher and ball catch method for staged fracturing of shale gas
  • Wellhead ball catcher and ball catch method for staged fracturing of shale gas
  • Wellhead ball catcher and ball catch method for staged fracturing of shale gas

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Embodiment 1

[0036] Such as figure 1 and figure 2 As shown, the invention provides a kind of wellhead ball catcher for staged fracturing of shale gas. The fracturing ball and the fracturing fluid are sucked out synchronously. When the wellhead ball catcher takes out the fracturing ball in the horizontal well, it separates the splitting fluid and the splitting ball. The ball falls back into the well, which is easy to catch the metal ball.

[0037] Second, in order to ensure the tightness of the wellhead ball catcher, reduce the working intensity of the power pump group, and discharge and collect the splitting balls from the wellhead ball catcher in time, this embodiment adds blades that can be turned over automatically on the wellhead ball catcher. It can be turned over to discharge the fracturing ball, and at the same time, it can also automatically reset and seal, without manual discharge of the fracturing ball, which is easy to operate and simple to implement.

[0038] It specificall...

Embodiment 2

[0056] Such as image 3 As shown, in order to further illustrate the working mode of the same type of ball catcher, the present invention additionally provides a method for catching balls at the wellhead for staged fracturing of shale gas, comprising the following steps:

[0057] Step 100, open the manual pressurization valve of the wellhead ball catcher, and the power pump connected to the wellhead ball catcher works to form a negative pressure airflow in the fracturing gas pipe;

[0058] Step 200, gradually increasing the working intensity of the power pump until the fracturing balls and fracturing slurry move up the fracturing air pipe to the wellhead ball catcher;

[0059] Step 300, the fracturing balls and the fracturing slurry are separated and collected in the wellhead ball catcher;

[0060] Step 400, dividing the ball storage space and the ball catch space of the wellhead ball catcher, and the fracturing balls are automatically transferred into the ball storage space....

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Abstract

The embodiment of the invention discloses a wellhead ball catcher for staged fracturing of shale gas, which includes a first pipeline, a second pipeline and a vertical pipeline, and the second pipeline is provided with an elastic filter plate at the connection with the vertical pipeline , the elastic filter plate is provided with a number of seepage mesh holes, the lower surface of the second pipeline is also provided with a liquid recovery mechanism, the inside of the vertical pipeline is provided with an automatic ball storage mechanism, and the liquid recovery mechanism includes a filter leak on the second pipeline, The filter sieve is connected with a recovery pipeline, and the end of the recovery pipeline is connected with the second pipeline on the rear side of the elastic filter plate; the implementation steps of the ball catching method are specifically to form a negative pressure airflow in the fracturing air pipe; the fracturing ball and the fracturing slurry along the The fracturing gas pipe is moved up to the wellhead ball catcher; the fracturing balls and fracturing fluid are separated and collected in the wellhead ball catcher; the fracturing balls are automatically transferred to the ball storage space; this scheme adds automatic flipping to the wellhead ball catcher The blades can be turned over to discharge the fracturing balls to ensure the tightness of the wellhead ball catcher.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of shale gas development, and in particular to a wellhead ball catcher and a ball catch method for staged fracturing of shale gas. Background technique [0002] As a new clean energy source, shale gas is gradually becoming a hotspot of global energy development. Compared with conventional natural gas, the development potential of shale gas resources is likely to be greater than that of conventional natural gas, but shale gas reservoirs have the characteristics of low saturation and low permeability, and the gas resistance is greater than that of conventional natural gas, so generally Under these circumstances, shale gas cannot be self-produced or the output is very low, and its recovery rate is very low, and large-scale economic exploitation cannot be realized. The flow resistance of shale gas is large. If the traditional mining method is used, the development of shale gas reservoi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B31/00E21B43/26
CPCE21B31/00E21B43/26
Inventor 谭晓波初光勇王先华李劲松伍春艳谢再波张友
Owner TONGREN POLYTECHNIC COLLEGE
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