Unlock instant, AI-driven research and patent intelligence for your innovation.

Seat seal and examining seal integrated technical method of horizontal well and orientating well

A process method and directional well technology, which are applied in the field of integrated process of setting and sealing, can solve the problems of delayed construction period and large drilling workload, and achieve the advantages of convenient operation, overcoming the delayed construction period, and simple and easy-to-operate sealing process. Effect

Inactive Publication Date: 2017-05-31
PETROCHINA CO LTD
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of the prior art that delays the construction period and the workload of tripping is large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Seat seal and examining seal integrated technical method of horizontal well and orientating well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In order to overcome the problems of delaying the construction period and heavy tripping workload in the prior art, this embodiment provides an integrated process method for setting and checking seals of horizontal wells and directional wells, which includes the following steps:

[0021] Step 1) Connect the safety joint 5, centralizer 4, seal verification packer 3 and bridge plug 1 to the tubing 6 in sequence, and the bridge plug 1 is connected to the end of the horizontal section of the tubing 6 through the setting tool 2 to obtain the setting and Integrated process string for seal inspection, such as figure 1 As shown, the process string is lowered to the target section of the casing 7;

[0022] Step 2) Set the bridge plug 1 under the action of the setting tool 2 and throw it away, and then observe whether it is unobstructed from the positive circulation wellbore of the tubing 6;

[0023] Step 3) Lift up and lower the oil pipe 6 and set the seal seal packer 3. From t...

Embodiment 2

[0029] Such as figure 1 As shown, the working principle of the integrated process string for setting and checking seals of horizontal wells and directional wells adopted in the present invention is as follows:

[0030] The tubing 6 is sequentially connected with a bridge plug 1, a seal check packer 3, a centralizer 4 and a safety joint 5 from the end. The bridge plug 1 is connected to the end of the horizontal section of the tubing 6 through a setting tool 2, and the tubing 6 is lowered to At the target position, under the action of the setting tool 2, the bridge plug 1 is set and dropped, and the oil pipe 6 is lifted up and down to set the seal inspection packer 3. From the oil pipe 6, it is pressed 10-15MPa to observe whether the casing 7 returns fluid, Whether the oil pipe 6 can hold and stabilize the pressure continuously. If the casing 7 does not return liquid, the oil pipe 6 stabilizes the pressure for 10 minutes, and the pressure drop is less than 2MPa, it means that th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a seat seal and examining seal integrated technical method of a horizontal well and a orientating well. The seat seal and examining seal integrated technical method comprises the following steps that (1), a seat seal and examining seal integrated technical pipe column is lowered; (2), whether an oil pipe positive cycle shaft is unobstructed is observed; (3), whether liquid of a casing pipe returns is observed, and whether the pressure of an oil pipe can be continuously held and stable is observed; (4), when examining seal is qualified, the step (3) can be repeated again to conduct seat seal and examining seal after the position of seat seal is replaced; and (5), the pressure of the oil pipe is released, and a drilling tool is pulled out. According to the seat seal and examining seal integrated technical method of the horizontal well and the orientating well, operation is convenient, the structure of the technical pipe column is simple, the problems that in the prior art, the construction period is delayed, and the workload of drilling and drill pulling is large are solved, and simultaneously, water absorption of an ejecting hole section and airtightness of a tested casing pipe can be worked out.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to an integrated process method for setting and checking seals of horizontal wells and directional wells. Background technique [0002] In various old well operations, it is necessary to preset bridge plugs or other tools in the wellbore. Due to the existence of perforation in the upper layer, generally the setting and inspection of bridge plugs need to be operated separately, that is, one trip of drilling tools to run and set the bridge plugs Put away the hand, pull out the drilling tool, and then run a bridge plug seal inspection drilling tool with a packer to check the seal. Due to separate operations, not only the construction period is delayed, but also the tripping workload is increased. Contents of the invention [0003] The purpose of the invention is to overcome the problems of the prior art that the construction period is delayed and the tripping workload is large....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/117E21B47/00E21B33/10
CPCE21B33/10E21B47/00E21B47/117
Inventor 张涛杨海恩唐凡郑力军刘保彻王石头康健肖彦英
Owner PETROCHINA CO LTD