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Downhole pumping method

A technology of pumping and pumping rings, which is applied in the field of oil well construction, can solve the problems of increasing the staged fracturing time of oil and gas wells, low pumping efficiency, and affecting the speed of pumping bridge plugs, etc., to speed up the pumping process, The effect of increasing the pushing area and saving time

Active Publication Date: 2019-08-09
CHENGDU INNOX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In oil and gas well staged fracturing operations, low pumping efficiency is often encountered when pumping bridge plugs
Due to the operating conditions, when a small outer diameter bridge plug is required, the gap between the bridge plug and the downhole casing is too large, and the drilling fluid flow area becomes larger. When the bridge plug is pumped, the force to push the bridge plug is reduced. This affects the speed at which the bridge plug is pumped, ultimately increasing the time it takes to stage a well for oil and gas wells

Method used

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Embodiment Construction

[0046] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0047] The block diagram of the downhole pumping method of the present invention can be found in figure 1 ,

[0048] Wherein, a kind of downhole pumping method of embodiment one comprises the following steps:

[0049] Step 1, connect the pumping tool 04 with the bridge plug 06, set the pumping ring 03 on the outer side of the pumping tool 04 or the bridge plug 06, make the outer side of the pumping ring 03 and the pumping tool 04 or the bridge plug 06 The outer surface of the pumping ring 03 and the outer surface of the pumping tool 04 or the bridge plug 06 are formed with a circumferential groove 07 in the circumferential direction. The circumferential groove 07 has a circular platform structure. The end is an op...

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Abstract

The invention discloses a downhole pumping method. A pumping ring is arranged on the outer side face of a pumping tool or a bridge plug, in the pumping process, the flow speed of drilling fluid reaches a first preset value V1, the drilling fluid enters a circumferential groove, at the edge of the circumferential groove, the internal pressure of the circumferential groove is greater than the external pressure of the circumferential groove, and thus the pumping ring is expanded towards the outer side at an opening of the circumferential groove; and at the moment, the pumping ring is expanded towards the outer side, thus the outer diameter of a setting tool is increased temporarily, that is, the pushing area of the bridge plug is increased, and accordingly, the setting tool and the bridge plug connected with the setting tool are more effectively pushed by the drilling fluid. The pumping process is accelerated, and the time is saved.

Description

technical field [0001] The invention relates to the field of oil well construction, in particular to a downhole pumping method. Background technique [0002] In oil and gas well staged fracturing operations, low pumping efficiency is often encountered when pumping bridge plugs. Due to the operating conditions, when a small outer diameter bridge plug is required, the gap between the bridge plug and the downhole casing is too large, and the drilling fluid flow area becomes larger. When the bridge plug is pumped, the force to push the bridge plug is reduced. This affects the speed of pumping the bridge plug, and ultimately increases the staged fracturing time of the oil and gas well. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a downhole pumping method for improving the pumping efficiency of downhole bridge plugs. [0004] The technical solution of the present invention to solve the above technical problems is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B23/08E21B43/26
CPCE21B23/08E21B43/26
Inventor 袁猷
Owner CHENGDU INNOX TECH CO LTD
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