Abrasive jet injection multiple fracturing device

A technology of layered fracturing and abrasive jet, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc. It can solve the problems of uncontrollable crack initiation position, inability to realize staged fracturing, easy damage of spray gun, etc. , to achieve the effect of increasing the tightness and firmness of the connection, improving the service life and preventing erosion damage

Inactive Publication Date: 2011-01-12
中国石油化工股份有限公司华北分公司工程技术研究院 +1
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  • Application Information

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Problems solved by technology

[0005] Chinese patent application No. 200510072121.8 discloses a "horizontal well fracturing method". The main defect of this method is that it cannot control the fracture ini

Method used

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  • Abrasive jet injection multiple fracturing device
  • Abrasive jet injection multiple fracturing device
  • Abrasive jet injection multiple fracturing device

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Embodiment Construction

[0035] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0036] figure 1 It is a structural schematic diagram of the first-stage bottom spray gun of the abrasive jet jet layered fracturing device of the present invention; figure 2 It is a schematic structural diagram of the upper spray guns at each level of the abrasive jet jet layered fracturing device of the present invention, which is in the closed state of the spray guns; image 3 It is a schematic diagram of the structure of the upper spray guns at each level of the abrasive jet jet layered fracturing device of the present invention, which is in the open state of the spray guns; Figure 4 It is a schematic diagram of the nozzle structure of the abrasive jet jet layered fracturing device of the present invention; Figure 5 It is...

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Abstract

The invention provides an abrasive jet injection multiple fracturing device. The device comprises multiple stages of spray guns which are connected in series, wherein each spray gun is a hollow cylinder, and at least two nozzles are formed on the side wall of each spray gun; the spray guns comprise a primary bottom spray gun which is arranged on the lower part of the abrasive jet injection device and multiple stages of upper spray guns which are positioned on the upper part of the bottom spray gun; a slide bushing capable of sealing the nozzle of the spray gun in the stage is arranged in each upper spray gun; an accommodating hole for accommodating the nozzle is formed on the side wall of each spray gun; a nozzle cap is sleeved outside the nozzle, and an inner hole of the nozzle cap is matched with the outer wall of the nozzle; the nozzle cap is in threaded connection with the accommodating hole, so that the nozzle is fixed on the side wall of each spray gun; and a splash-proof block is arranged on the outer wall of each spray gun close to the nozzles. The abrasive jet injection multiple fracturing device can effectively prevent splash-return jet from eroding and destroying a spray gun body, prolongs the service life of the spray guns, and simultaneously, reduces the manufacturing cost of the spray guns.

Description

technical field [0001] The invention relates to an abrasive jet jet layered fracturing device, in particular to an abrasive jet jet layered fracturing device capable of improving the service life of a spray gun. The device is particularly suitable for operations in underground mining fields such as oil and natural gas. Background technique [0002] Low-permeability oil and gas field reserves account for 28% of domestic proven reserves, and newly added low-permeability proven reserves account for more than 50% of the total new proven reserves every year. Hydraulic fracturing is an effective way to produce and improve low-permeability reserves. In 1947, the hydraulic fracturing stimulation technology was first implemented in a vertical well in the HUGOTON gas field in the southwest of KANSAS in the United States. After nearly half a century of development, especially since the late 1980s, in fracturing design, fracturing fluid And additives, proppants, fracturing equipment and...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B43/114
Inventor 邢景宝郑峰辉秦玉英李根生黄中伟田守嶒牛继磊
Owner 中国石油化工股份有限公司华北分公司工程技术研究院
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