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A Downhole Mechanical Hydraulic Pulse Generator

A technology of hydraulic pulse and generating device, applied in vibration generating device, wellbore/well components, production fluid, etc., can solve the problems of hindering the flow of crude oil into the wellbore channel, reducing the permeability of crude oil, poor oil fluidity, etc., so as to improve the flow of crude oil. The effect of stability, simple structure and convenient operation

Active Publication Date: 2019-03-08
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of oil and gas exploitation, the crude oil produced by the natural pressure inside the oil and gas reservoir usually does not exceed 10% of the reserves, and the remaining oil has poor fluidity and is difficult to extract; During the process, some blockages were formed due to various reasons, which hindered the passage of crude oil into the wellbore and reduced the permeability of crude oil

Method used

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  • A Downhole Mechanical Hydraulic Pulse Generator
  • A Downhole Mechanical Hydraulic Pulse Generator
  • A Downhole Mechanical Hydraulic Pulse Generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Depend on figure 1 , figure 2 Shown is a downhole mechanical hydraulic pulse generating device for generating low-frequency hydraulic oscillations on the fluid in the oil and gas well casing. The entire multi-stage mechanical hydraulic pulse generating device is composed of a motor 1 and a plurality of mechanical pulse generating units. The mechanical pulse generating The connecting rods 2 and couplings 3 are connected in series between the units and between the motor and the mechanical pulse generating unit. Each mechanical pulse generating unit is composed of an outer cylinder 4, a gearbox, a planetary bevel gear set, a half-length rotor, and a full-length rotor: the inside of the outer cylinder is used to place the gear box, half-length rotor, and full-length rotor, and the shafts at both ends of the outer cylinder The holes are used to place the half-length rotor, and the full-length rotor is placed between the two half-length rotors. The half-length rotor and the...

Embodiment 2

[0043] A downhole mechanical hydraulic pulse generating device for generating low-frequency hydraulic oscillations on the fluid in the oil and gas well casing, the same as in Embodiment 1, the difference is that the blades of the half-length blade 18 and the full-length blade 20 are flat plates, and the The mechanical pulse generating unit is arranged in a straight shape, and the motor has the same hydraulic oscillation pressure regardless of whether it is in forward rotation or reverse rotation.

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Abstract

The invention relates to a downhole mechanical hydraulic pulse generation device. The whole multi-stage mechanical hydraulic pulse generation device is composed of a motor and a plurality of identical mechanical pulse generation units. The mechanical pulse generation units are connected in series through couplings and connecting rods, and the motor and the mechanical pulse generation units are also connected in series through couplings and connecting rods. Each mechanical pulse generation unit is composed of an outer barrel, positioning spokes, bolts, sealing loops, gear case end covers, distance-regulating rings, sealing rings, gear case bodies, bevel pinion shafts, bevel pinions, planet carriers, lock nuts, bevel gear wheels, semi-major rotary shafts, semi-major blades, an overall-length rotary shaft and an overall-length blade. When the whole device operates, the motor drives the blades in the mechanical pulse generation units to rotate, positive pressure areas and negative pressure areas are alternately formed in a casing, the effects of cleaning oil-gas well casings and improving stratal permeability and liquidity of crude oil can be achieved, and new measures for augmenting production and injection can be provided for the oil and gas exploitation process.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation in petroleum engineering, in particular to a downhole mechanical hydraulic pulse generating device, which can achieve the effects of cleaning oil and gas well casings, improving the permeability of formations, and improving the fluidity of crude oil, and further broadens the oil and gas exploitation process. techniques and means. Background technique [0002] Oil production engineering is a technical operation aimed at the acquisition of oil, natural gas and other resources. The purpose of its improvement and innovation is to increase oil and gas production and obtain good economic benefits. In the process of oil and gas exploitation, the crude oil produced by the natural pressure inside the oil and gas reservoir usually does not exceed 10% of the reserves, and the remaining oil has poor fluidity and is difficult to extract; During the process, some blockages were formed due to various rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B28/00E21B37/00E21B43/16
CPCE21B28/00E21B37/00E21B43/16
Inventor 张广清周再乐王元元
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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