Using method of packer backwashing

A packer and backwash well technology, which is applied in the directions of sealing/isolation, earthwork drilling and flushing, etc., can solve the problems such as difficult control of the opening pressure of the backwash mechanism and the inability to open the backwash mechanism, so as to ensure Turn on the stability and ensure the effect of backwashing effect

Active Publication Date: 2020-08-28
PANJIN DONGFANG RUIFU PETROLEUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the general water injection process, wells need to be backwashed. Currently, the water injection packers currently in use have the problem that the backwash mechanism cannot be opened often, and the opening pressure of the backwash mechanism is difficult to control.

Method used

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  • Using method of packer backwashing

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Embodiment Construction

[0017] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0018] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may be another element in between. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or it may be present interveni...

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Abstract

The invention discloses a using method of packer backwashing. The using method of packer backwashing includes the steps that step1, a Y221 packer is connected to a lower well of a pipe column, the pipe column is rotated after lifting the pipe column outside the well after the packer is lowered to a predetermined position, and then the pipe column continues to be lowered to complete packer setting;step 2, when backwashing is needed, casing pipe pressure is increased by injecting liquid into oil sleeve annulus, when the pressure reaches a set value, a backwash piston sleeve 105 is pushed to compress a backwash spring 102 to move upward, a blocking ring 103 is squeezed to ensure that a backwash mechanism opens; step 3, when the pressure in a casing pipe disappears, the backwash piston sleeve105 returns to the original position under the action of the backwash spring 102, and a well washing channel can be closed; and step 4, when unsealing is needed, the pipe column is lifted outside thewell, a rubber tube 108 resets, and unsealing the packer is completed.

Description

technical field [0001] The invention relates to a method for using a packer for backwashing, in particular to a method for using a Y221 packer, and belongs to the field of downhole tools for oil field production. Background technique [0002] In the late stage of oilfield development, the pressure of the bottom layer must be continuously supplemented by water injection. Conventional water injection methods include general water injection and layered water injection. However, in the general water injection process, backwashing is required. The water injection packers currently in use have problems such as the backwash mechanism often not opening, and the opening pressure of the backwash mechanism is difficult to control. Contents of the invention [0003] In view of the above disadvantages, an object of the present invention is to provide a Y221 packer with an anchoring function, so as to ensure the opening stability of the backwash mechanism and ensure the backwash effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/128E21B23/06E21B21/00
CPCE21B33/128E21B23/06E21B21/00
Inventor 孙金祥
Owner PANJIN DONGFANG RUIFU PETROLEUM TECH
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