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Ceramic slip composite bridge plug

A composite bridge and slip technology, which is applied to drilling equipment, earthwork drilling, drill pipe, etc., can solve problems such as easy jamming, difficulty in drilling and milling, and difficulty in flowback of cuttings, so as to improve work efficiency and change wellbore conditions Effect

Inactive Publication Date: 2013-12-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems of existing metal bridge plugs or metal slip composite bridge plugs during drilling and removing construction, such as easy jamming, difficulty in drilling and milling, and difficulty in flowback of drill cuttings, the present invention provides a ceramic slip composite bridge plug, The ceramic slip composite bridge plug can be firmly seated and temporarily sealed off the production layer or abandoned layer to complete the purpose of follow-up testing, fracturing reconstruction and other operations

Method used

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Examples

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Embodiment 1

[0022] The ceramic slip composite bridge plug according to the present invention will be described in detail below in conjunction with the accompanying drawings. A ceramic slip composite bridge plug, comprising a central cylinder 1, from one end of the central cylinder 1 to the other end of the central cylinder 1, an upper spacer ring 3, a positioning cone 6, a rubber cylinder 10, a positioning The cone 6 and the lower spacer ring 11, the lower spacer ring 11 is fixedly connected with the center cylinder 1, the upper spacer ring 3, the positioning cone 6 and the rubber tube 10 can all move along the axial direction of the center cylinder 1, and the positioning cone 6 is a cone shape, the circumferential direction of the positioning cone 6 is provided with a plurality of split-type bases 4, and the split-type bases 4 can move along the generatrix direction of the positioning cone 6, such as figure 1 shown.

[0023] The split base 4 on the left side is arranged between the uppe...

Embodiment 2

[0036] This embodiment is an improvement on Embodiment 1, and its difference lies in that the top of the split base 4 is provided with ceramic slips 41, and the top of the ceramic slips 41 is arranged along the circumferential direction of the positioning cone 6. Zigzag-shaped raised strips, such as Figure 4 As shown, there are three parallel protruding strips on the top of the ceramic slips 41 , that is, a zigzag structure is formed on the top of the ceramic slips 41 .

[0037] The advantage of this design is: when the top of the ceramic slip 41 is embedded in the inner wall of the sleeve 13, it forms a line contact with the inner wall of the sleeve 13, changing the original point contact into a line contact, increasing the force point, and the fixing effect is better . At the same time, the tip of the tooth on the ceramic slip 41 has a rounded structure, which can fully and effectively disperse the hard force acting on the tip of the tooth, so that the tip of the ceramic s...

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Abstract

The invention discloses a ceramic slip composite bridge plug. The ceramic slip composite bridge plug comprises a central cylinder (1), wherein an upper distance ring (3), a positioning cone body (6) and a rubber sleeve (10) are sequentially sleeved on the exterior of the central cylinder (1), the positioning cone body (6) is fixedly connected with a lower distance ring (11), and the lower distance ring (11) is fixedly connected with the central cylinder (1); the upper distance ring (3), the positioning cone body (6) and the rubber sleeve (10) can move along the axial direction of the central cylinder (1), a plurality of sectionalized substrates (4) are arranged on the positioning cone body (6) in the circumferential direction, and the sectionalized substrates (4) can move along the bus direction of the positioning cone body (6). According to the ceramic slip composite bridge plug, in the seal setting process, the sectionalized substrates can be cracked in a sectionalized manner and embedded into the inner wall of a sleeve, so that a firm and reliable seal setting effect is formed.

Description

technical field [0001] The invention relates to the field of oil exploitation equipment, in particular to a ceramic slip composite bridge plug used in oil and gas well production casings in construction processes such as oil and gas well production, plugging and fracturing reconstruction. Background technique [0002] In the process of oil and gas well testing, when there are multi-layer formations, there are differences between the layers of oil, gas and water layers, and measures such as layered testing and layered stimulation are required. At this time, plugging and layering tools are required. For a long time, drillable and millable metal bridge plugs have been widely used as oil and gas well layer separation devices in oil fields at home and abroad. Existing bridge plugs made of metal have disadvantages such as easy jamming and difficulty in drilling and milling after construction. Once an accident occurs during construction, it is quite troublesome to deal with. Espec...

Claims

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Application Information

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IPC IPC(8): E21B19/10
Inventor 王新忠薛建军裴晓含钱杰黄鹏童征李明
Owner PETROCHINA CO LTD
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