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Archimedes double-spiral division type hydraulic ejector

A hydraulic ejector and double-helix technology, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., to achieve pressure balance, solve failure problems, and achieve obvious effects

Active Publication Date: 2016-05-25
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

[0004] The purpose of the present invention is to solve the problem of sand concentration, flow and pressure balance between the nozzles of conventional single-stage hydraulic injectors or between double-cluster hydraulic injectors, and effectively prevent the early failure of downstream injectors caused by erosion of double-cluster hydraulic injectors

Method used

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  • Archimedes double-spiral division type hydraulic ejector
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  • Archimedes double-spiral division type hydraulic ejector

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Such as figure 1 As shown in the schematic diagram of the Archimedes double-helix split-flow hydraulic injector, it includes the injector body 1 and the nozzle 2. It is characterized in that: the inner wall of the injector cavity 3 in the injector body 1 is distributed with two groups of Archimedes The flow passages 5 distributed in double helix lines, the nozzles 2 are arranged on two groups of flow passages 5 and connected to the outer surface of the injector body 1 .

[0020] The injector body 1 of the Archimedes double-helix split-flow hydraulic injector has a length of 370mm, an outer diameter of 100mm, and an inner diameter of 32mm. The pitch is 120mm, and the pitch of the double helix is ​​30mm.

[0021] In this hydro-ejector, the flow channel 5 with Archimedes double-helix distribution is designed on the inner cavity structure of the conventional hydro-ejector, and the parameters of the double-helix structure are optimized. On the flow channel 5, the sand-carr...

Embodiment 2

[0030] In this embodiment, two nozzles 2 are arranged on each of the two groups of flow channels 5 . Such as figure 2 As shown, the four nozzles 2 are evenly arranged on the flow channel 5 distributed in the Archimedes double helix, which can ensure that the sand-carrying fluid flows to each nozzle 2 along the double helix flow channel 5 in the injector inner cavity 3 middle.

[0031] The outlet of the nozzle 2 is also provided with a cover plate, which is threadedly connected to the injector body 1, so as to facilitate replacement when the nozzle is damaged. The structure of the cover plate belongs to common knowledge in the art, and will not be described in detail here.

[0032] The upper and lower ends of the injector body 1 are provided with threaded threads 4, the threaded threaded 4 is 2-7 / 8"NU, 10 teeth per inch, and the taper is 1:16. Through the thread and other equipment connection for easy disassembly, replacement and maintenance.

Embodiment 3

[0034] In this embodiment, the three-dimensional shape of the two groups of runners 5 distributed in the inner wall of the inner chamber 3 of the injector in the form of Archimedes double helix is ​​a trapezoidal groove, see image 3 , wherein the groove length of the runner 5 trapezoidal groove is 120 mm, the groove depth is 5 mm, the width of the bottom of the groove is 10 mm, and the trapezoidal angle is 60°.

[0035] The injector body 1 is made of 35CrMo material, heat-treated HBW197~235, the inner cavity of the injector 3 is specially processed with the Archimedes double-helix trapezoidal structure flow channel 5, and the surface of the flow channel 5 of the double-helix trapezoidal groove is plated with nickel-based alloy material to prevent the local erosion of the spiral trapezoidal groove caused by the change of the direction of rotation (spin angle) of the fluid, and improve the effect of double helix swirl flow diversion; the nozzle 2 is made of erosion-resistant har...

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Abstract

The invention relates to the field of straight well and horizontal well multi-stage hydraulic ejecting fracture process tube columns, in particular to an Archimedes double-spiral division type hydraulic ejector. The ejector comprises an ejector body and nozzles, and is characterized in that two passageways distributed in an Archimedes double-spiral mode are distributed on the inner wall of an ejector inner cavity in the ejector body, and the nozzles are arranged on the two passageways and communicated with the outer surface of the ejector body. The passageways distributed in the Archimedes double-spiral mode are designed on the inner cavity of a conventional hydraulic ejector, the parameters of the double-spiral structure are optimized, the nozzles are distributed on the double-spiral passageways of the ejector inner cavity, and therefore sand carrying fluid flows to the nozzles along the spiral passageways in the Archimedes double-spiral body, the concentration, flow and pressure of particle sand among single-stage hydraulic ejector nozzles or double-cluster hydraulic ejectors are balanced, the problem that a double-cluster hydraulic ejector fails is effectively solved, practicability is high, and the effect is obvious.

Description

technical field [0001] The invention relates to the field of multi-stage hydraulic jet fracturing process strings for vertical wells and horizontal wells, in particular to an Archimedes double-helix split-flow hydraulic jet. Background technique [0002] Low-permeability oil and gas wells use multi-stage hydraulic jet fracturing strings for integrated operations of reservoir stimulation, oil testing, and well completion, among which the hydraulic jet is the key tool for implementing the hydraulic jet fracturing process. [0003] Due to the current hydraulic jet fracturing construction process, the conventional single-stage hydraulic injectors have uneven particle sand concentration between nozzles, and similar serious uneven particle sand concentration has also occurred between double-cluster hydraulic injectors, resulting in The upstream injector cannot penetrate the casing and formation or the perforation time is long, and the downstream injector penetrates the casing and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/114
CPCE21B43/114
Inventor 王祖文仝少凯白明伟张冕杨红斌徐迎新崔会贺齐加德
Owner BC P INC CHINA NAT PETROLEUM CORP
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