Fluid self-excited pressure pulse oscillation generating device and using method

A technology of pressure pulse and generating device, which is applied in the direction of vibration generating device, mining fluid, earthwork drilling and production, etc. It can solve the problems of complex structure of supporting tools, low effective power of plugging removal, poor working reliability, etc., and achieves adaptability to wide well conditions, Improve the effect of plugging removal, work safety and reliability

Pending Publication Date: 2020-10-09
山东油威石油科技有限公司
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

Vibration plugging removal process technology is currently applied in some oilfields in specific blocks such as low-permeability oilfields. Although some effects have been achieved in the field, there are various degrees: high requirements for well conditions, poor work reliability, and technical problems. It is cumbersome, the structure of supporting tools is complicated, and the effective power of plugging is small, etc.

Method used

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  • Fluid self-excited pressure pulse oscillation generating device and using method

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Embodiment Construction

[0022] In order to clearly illustrate the technical features of the solution, the solution will be described below through specific implementation modes.

[0023] Such as figure 1 A fluid self-excited pressure pulse oscillation generating device is shown, including a central tube 1, a fixed sleeve 2 and a moving sleeve 3 sleeved on the central tube 1, the fixed sleeve 2 is located above the moving sleeve 3, and the lower end of the central tube is provided with The internal thread 17 is used to connect with the short joint of the oil pipe, and the upper end is provided with an external thread 11 for connecting with the oil pipe collar.

[0024] The upper end of the inner hole of the fixed sleeve 2 and the central pipe 1 are sealed and fixed through the connection structure 13, which can be welded, or a sealing ring can be arranged between the central pipe and the fixed sleeve to make the two sealed and fixed, and a joint is provided under the connection structure. There is an...

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Abstract

The invention relates to a fluid self-excited pressure pulse oscillation generating device and a using method. The oscillation generating device comprises a central pipe, a fixed sleeve and a movablesleeve, wherein the fixed sleeve and the movable sleeve are arranged on the outer side of the central pipe in a sleeving mode, an annular gap with an opening facing the movable sleeve is arranged between the fixed sleeve and the central pipe, and a through hole for communicating the annular gap with an inner cavity of the central pipe is formed in the pipe wall of the central pipe; and the movablesleeve comprises an opening and closing section and an extending section, the opening and closing section is in sealed sliding connection with the central pipe, an annular cavity is formed between the opening and closing section and the central pipe, the cross section area of the annular cavity is larger than that of the annular gap, and a nozzle for communicating the annular cavity with the inner cavity of the central pipe is further arranged on the pipe wall of the central pipe. According to the fluid self-excited pressure pulse oscillation generating device and the using method, the movable sleeve moves up and down in a reciprocating mode by utilizing the pressure difference, so that the nozzle is alternately blocked and opened, power liquid is frequently and alternately sprayed to a production layer through the nozzle to generate pressure pulses, and the plugging removal effect of an oil-water well can be greatly improved.

Description

technical field [0001] The invention relates to the field of downhole supporting devices for oil and water well plugging removal operations in oil fields, in particular to a fluid self-excited pressure pulse oscillation generating device and a use method. Background technique [0002] At present, the technical measures for oil well stimulation and oil well injection are acidizing and fracturing. The purpose of acidizing is to remove the blockage in the production layer and its cement sheath and the wellbore passage, so as to improve the permeability between the formation and the wellbore; The purpose of fracturing is to use high-pressure power fluid to artificially create fractures in the production layer of oil (water) wells and fill them with proppant to improve their permeability. Vibration plugging removal process technology is currently applied in some oilfields in specific blocks such as low-permeability oilfields. Although some effects have been achieved in the field,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B28/00E21B43/25
CPCE21B28/00E21B43/25
Inventor 徐荐吾黄国元马春成
Owner 山东油威石油科技有限公司
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