Hydraulic Seat Seal Permanent Openhole Packer and Openhole Completion Isolation Method

A packer and hydraulic technology, used in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve the problems of long construction period, limited sealing performance, low pressure differential capacity, etc., and achieve structural design. Ingenious, saving operation time and high pressure bearing capacity

Active Publication Date: 2015-09-30
ANTON OILFIELD SERVICES (GRP) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the expandable packer: its sealing performance is limited due to the pressure difference between the inside and outside of the rubber cylinder, and the ability to bear the pressure difference is generally low
Fluid-swellable packer: First, because the rubber barrel automatically expands slowly after encountering liquid, if there is a waiting to stop the operation during the running process, there is a risk of swelling when encountering liquid; second, the sealing performance is related to the type of downhole fluid and the amount of fluid There is a relationship, after the tool is put into the well, it needs to be given time to fully expand, so the construction period is long

Method used

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  • Hydraulic Seat Seal Permanent Openhole Packer and Openhole Completion Isolation Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is a semi-sectional view of the structure of the invented hydraulic seated permanent open hole packer. Such as figure 1 As shown, the hydraulic seated permanent open hole packer includes a mandrel 17 with an axial through hole. One end of the mandrel 17 is connected to the first joint 1, and the other end is connected to the second joint 18. The joint 1 to the second joint 18 are sequentially socketed with the left push slip 3, the first metal expansion bowl 5, the first auxiliary rubber cylinder pressure ring 19, the first auxiliary rubber cylinder 6, the first spacer ring 7, the main rubber cylinder 9, The second spacer ring 20, the second auxiliary rubber cylinder 21, the second auxiliary rubber cylinder pressure ring 10, the second metal expansion bowl 11, the shear ring 12, the piston 14 and the stop ring 15; one end of the slip 3 is pushed left It is located between the first joint 1 and the mandrel 17, and is in sealing and sliding connection with t...

Embodiment 2

[0026] This embodiment is an open-hole well completion isolation method using the above-mentioned packer of the present invention. For the part related to the packer, please refer to figure 1 and the above description. The details of this embodiment are as follows: the open hole completion isolation method using the above-mentioned packer includes the following steps:

[0027] a. Connect the above-mentioned packer to the completion string, wherein the second joint of the packer is connected to the wellbore isolation valve with a ball seat through the tubing, and the first joint is connected to the tubing or drill pipe;

[0028] b. Send the packer to the downhole design position, put the sealing ball into the ball seat of the wellbore isolation valve through the drill pipe or tubing;

[0029] c. Pressing from the oil pipe or drill pipe, the pressure is transmitted to the left push slip 3 and the piston 14 respectively through the first pressure transmission hole 23 and the sec...

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Abstract

The invention discloses a hydraulic seat seal permanent open hole packer and an open hole well-completion packing method, wherein the packer comprises a central spindle with an axial through hole, the central spindle is connected with a first joint at one end, is connected with a second joint at the other end, is sheathed with a left push slip, a first metal expansion bowl, a first assisting rubber barrel press ring, a first assisting rubber barrel, a first retainer, a main rubber barrel, a second retainer, a second assisting rubber barrel press ring, a second assisting rubber barrel, a second metal expansion bawl, a shearing ring, a piston and a stopping ring in sequence from the first joint, and is provided with a first pressure conduction hole and a first slip corresponding to the first left push slip, a support ring is arranged between the main rubber barrel and the central spindle, an outer barrel is sheathed outside the piston, is connected with the second joint at one end and is connected with the shearing ring at the other end, and the central spindle is provided with a second slip corresponding to the piston and a second pressure conduction hole positioned between the stopping ring and the piston. The hydraulic seat seal permanent open hole packer disclosed by the invention is fast and durable.

Description

technical field [0001] The invention relates to the technical field of staged reconstruction of open-hole completion of vertical wells or horizontal wells in oil fields, in particular to a hydraulic-sealing permanent open-hole packer and an open-hole completion sealing method. Background technique [0002] In the process of oil field production, the staged stimulation technology of vertical wells or horizontal wells is an effective production stimulation measure for the efficient development of low-permeability oil and gas reservoirs, ultra-low permeability, ultra-low permeability, shale gas reservoirs and other unconventional oil and gas reservoirs. Due to the long horizontal section and strong heterogeneity of multi-layer vertical wells or single-layer horizontal wells, one-off general acidizing or fracturing is not targeted and often fails to achieve the purpose of stimulation. However, the use of open hole packers for staged completion and stimulation can take targeted s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/12
Inventor 张鼎业王大勇张红李忠宝何归白锋
Owner ANTON OILFIELD SERVICES (GRP) LTD
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