Multi-orifice nozzle device with rock breaking and self-propelling modes

A multi-hole nozzle and dual-mode technology, applied in construction and other directions, can solve problems such as insufficient hydraulic energy, and achieve the effects of reducing frictional resistance, increasing extension limit, and regular shape

Active Publication Date: 2014-10-22
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0010] In order to overcome the defect of insufficient hydraulic energy of all nozzles in the existing radial horizontal drilling, especially in the radial horizontal well technology under the condition of no reaming, the hydraulic energy is seriously insufficient due to the limitation of the pipeline

Method used

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  • Multi-orifice nozzle device with rock breaking and self-propelling modes
  • Multi-orifice nozzle device with rock breaking and self-propelling modes
  • Multi-orifice nozzle device with rock breaking and self-propelling modes

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Embodiment Construction

[0027]A rock-breaking and self-advancing dual-mode porous nozzle device of the present invention mainly includes: a nozzle body, an impeller shaft, a switch and the like. It is characterized in that a switch driven by the impeller shaft is added to the nozzle body that requires the phase of the forward hole and the backward hole. Since the phases of the other forward holes and the rear hole are consistent except for the forward center hole, the switch The hollow part of the front face of the device (or the shielding wall of the front face) is in phase with the shielding wall (or hollow part) of the side respectively, so the forward eyelet and the rearward eyelet around the center cannot be fully opened at the same time, when the high-speed fluid flows through the impeller shaft, Rotate the shaft of the driving impeller, so that the forward holes and the backward holes are opened alternately, so that the jet rock breaking and the nozzle self-progress alternately, and the forward...

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Abstract

The invention discloses a multi-orifice nozzle device with rock breaking and self-propelling modes. The technical scheme includes that a rotary core composed of an impeller shaft and a switch is added into a multi-orifice nozzle having requirements for phases and distance of forward holes and backward holes. When entering the nozzle body, high-pressure fluid drives the impeller shaft to drive the switch connected to rotate, the phases of the forward holes and the backward holes are identical, and phases of the hollow portions of the front end face of the switch are identical with phases of lateral shading portions, so that jet-flow rock breaking and self-propelling of the nozzle can be alternatively performed. The multi-orifice nozzle device is particularly applicable to the non-chamfering radial horizontal well technology, downhole limited hydraulic energy is independently used for jet-flow rock breaking and self-propelling of the nozzle in different time divisions, and rock breaking efficiency and self-propelling capacity of the nozzle are greatly improved. Further, by adjusting structural parameters of the switch, jet-flow rock breaking time is longer than the self-propelling time of the nozzle, and hydraulic energy can be efficiently utilized. Meanwhile, holes are formed regularly due to the forward holes and the backward holes in large quantity.

Description

technical field [0001] The invention relates to a nozzle device suitable for ultra-short-radius radial horizontal well technology in the field of oil exploitation, in particular to a rock-breaking device capable of separating the two processes of jet-rock breaking and nozzle self-advancement, and simultaneously producing pulse cavitation effects Device with self-advancing dual-mode multi-hole nozzles. The nozzle of the invention is especially suitable for the application of ultra-short radius radial horizontal wells under the condition of no reaming. Background technique [0002] Ultra-short radius sidetracking horizontal well drilling technology (also known as radial horizontal well drilling technology) refers to drilling one or more horizontal wellbores radially distributed in a vertical wellbore. This technology is a new oil field stimulation technology developed in recent decades. Utilizing this technology can revive dead wells, greatly increase oil well production and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/61
Inventor 李根生李敬彬黄中伟宋先知田守嶒史怀忠程宇雄
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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