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Oil jacket safety packer with anchoring function and method thereof

A packer and anchoring technology is applied in the field of tubing and casing annular safety protection devices, which can solve problems such as hidden dangers of well control safety, easy failure of tools, unreasonable design of well cleaning structures, etc. Variable volume, reducing the possible effect of encountering a card

Active Publication Date: 2021-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the early stage, Shengli Chengdao Oilfield designed and used an oil casing safety protector (ZL 201420015639.2) for the lack of safety protection tools between the tubing and casing. When flushing the well, the hydraulic control pipeline connected to the ground is pressurized to realize the well flushing, which solved the urgent problem at that time, but the protector has no anchor structure and the tool is prone to failure when the pressure difference between the two ends of the tool is large, and the design of the well flushing structure is not good. There are reasonable cases of not closing after opening, which brings great safety hazards to on-site well control

Method used

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  • Oil jacket safety packer with anchoring function and method thereof
  • Oil jacket safety packer with anchoring function and method thereof
  • Oil jacket safety packer with anchoring function and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] see Figure 1 to Figure 5 , the present invention provides a technical solution: an anchored oil jacket safety packer, comprising:

[0070] A large-displacement well-flushing control device, the large-displacement well-flush control device is set outside the center pipe 2, and the upper end of the large-displacement well-flush control device is connected to the first hydraulic control pipeline;

[0071] The packer setting, anchoring and unsealing device is set on the outside of the central pipe, and the upper end of the packer setting, anchoring and unsealing device is connected to the second hydraulic control pipeline.

[0072] Further, the large displacement well flushing control device includes:

[0073] The backwash sleeve 9, the upper end of the backwash sleeve is connected to the piston sleeve 8, the piston sleeve is installed with the piston 6, the lower end of the backwash sleeve is a spring sleeve 12, and the middle part of the backwash sleeve is provided with...

Embodiment 2

[0137] see figure 1 , the present invention provides a technical solution: an anchored oil jacket safety packer, comprising:

[0138] A large-displacement well-flushing control device, the large-displacement well-flush control device is set outside the center pipe 2, and the upper end of the large-displacement well-flush control device is connected to the first hydraulic control pipeline;

[0139] The packer setting, anchoring and unsealing device is set on the outside of the central pipe, and the upper end of the packer setting, anchoring and unsealing device is connected to the second hydraulic control pipeline.

[0140] Further, the large displacement well flushing control device includes:

[0141] The backwash sleeve 9, the upper end of the backwash sleeve is connected to the piston sleeve 8, the piston sleeve is equipped with a piston 6, the lower end of the backwash sleeve is a spring sleeve 12, and the middle part of the backwash sleeve is provided with a radially conn...

Embodiment 3

[0173] see figure 1 , the present invention provides a technical solution: an anchored oil jacket safety packer, comprising:

[0174] A large-displacement well-flushing control device, the large-displacement well-flush control device is set outside the center pipe 2, and the upper end of the large-displacement well-flush control device is connected to the first hydraulic control pipeline;

[0175] The packer setting, anchoring and unsealing device is set on the outside of the central pipe, and the upper end of the packer setting, anchoring and unsealing device is connected to the second hydraulic control pipeline.

[0176] Further, the large displacement well flushing control device includes:

[0177] The backwash sleeve 9, the upper end of the backwash sleeve is connected to the piston sleeve 8, the piston sleeve is installed with the piston 6, the lower end of the backwash sleeve is a spring sleeve 12, and the middle part of the backwash sleeve is provided with a radially c...

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Abstract

The invention discloses an oil jacket safety packer with an anchoring function and a method thereof. The oil jacket safety packer comprises a large-displacement well washing control device and a packer setting anchoring and unsetting device, the large-displacement well washing control device is mounted outside a central pipe in a sleeving mode, and the upper end of the large-displacement well washing control device is connected with a first hydraulic control pipeline; and the packer setting anchoring and unsetting device is arranged outside the central pipe in a sleeving mode, and the upper end of the packer setting anchoring and unsetting device is connected with a second hydraulic control pipeline. According to the oil jacket safety packer, setting anchoring can be continuously provided when a setting hydraulic control pipeline has no pressure, and opening and closing of a large-displacement well washing channel can be realized through a well washing hydraulic control pipeline.

Description

technical field [0001] The invention relates to the technical field of annulus safety protection devices for tubing casings, in particular to an anchored oil casing safety packer and a method thereof. Background technique [0002] In view of the strict environmental protection requirements at sea and the instantaneous, catastrophic and irreversible nature of emergencies, Shengli Chengdao Oilfield requires that safety control tools must be used in the casing annulus of water injection wells. The safety tools should have sealing, anchoring and well-washable function. [0003] Application number: 201420015639.2, application date: 2014-01-11 discloses an oil jacket safety protector, including a cylinder structure connected from top to bottom by an upper joint, a central pipe, and a lower joint. A body is provided on the outside, and a rubber tube and a seat unsealing device acting under the rubber tube are provided on the outside of the body. The unsealing device includes a pu...

Claims

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Application Information

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IPC IPC(8): E21B33/12E21B21/00E21B23/06E21B21/10
CPCE21B33/12E21B21/00E21B23/06E21B21/10
Inventor 魏新晨郭林园张剑贺启强田俊蔡增田申兴哲任从坤聂文龙石琼
Owner CHINA PETROLEUM & CHEM CORP
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