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Special efficient grinding shoe for drift-diameter bridge plugs

A bridge plug and high-efficiency technology, applied in the direction of wellbore/well components, earthwork drilling and production, etc., can solve the problems of low drilling efficiency, debris and sediment in the lower part of the bridge plug can not be cleaned in time, to improve drilling efficiency, Improve the milling effect and keep the effect of cleaning

Active Publication Date: 2016-03-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of low efficiency of existing drilling, grinding and drilling, and the inability to clean the debris and sediments in the lower part of bridge plugs in time, the present invention provides a special high-efficiency grinding shoe for bridge plugs.

Method used

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  • Special efficient grinding shoe for drift-diameter bridge plugs
  • Special efficient grinding shoe for drift-diameter bridge plugs
  • Special efficient grinding shoe for drift-diameter bridge plugs

Examples

Experimental program
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Effect test

Embodiment 1

[0020] In order to overcome the problems of low efficiency of existing drilling, grinding and drilling, and the inability to clean the debris and sediments in the lower part of the bridge plug in time, the present invention provides such figure 1 , figure 2 , image 3 , Figure 4 A special high-efficiency grinding shoe for bridge plugs is shown. It is suitable for the drilling and milling needs of fast drilling bridge plugs with larger diameters. It can greatly improve the grinding shoe and drilling efficiency of the fast drilling bridge plug.

[0021] A special high-efficiency flat-bottomed grinding shoe for bridge plugs, including a main body 1, a six-petal milling italic body 2, a YG carbide block 5 and a reverse-guided milling body 6, one end of the body 1 is connected to a reverse-guided milling body Body 6, the reverse guide milling body 6 is connected to the six-lobe milling italic body 2; there are seven channels for liquid circulation at the bottom of the six-lob...

Embodiment 2

[0024] Based on Embodiment 1, in this embodiment, the bottom of the six-lobed milling oblique body 2 is provided with an eccentric flushing water eye 4 .

[0025] The cross-section of the YG cemented carbide block 5 is equilateral and multi-rhombic, and each part has the same geometric shape to ensure that there are cutting points in multiple directions.

[0026] The YG hard alloy block 5 is evenly laid and welded on the six-lobe milling oblique body 2 of the milling shoe. Regardless of the shape or position of the milling bridge plug fish head, there are sharp cutting angles and cutting points where it meets the fish head.

[0027] 4-6 layers of YG hard alloy blocks 5 are evenly laid and welded between the six-petal milling italic body 2 and the reverse-guided milling body 6 .

[0028] The hardness of YG cemented carbide block 5 is HRA91.

[0029] There are 7 channels for liquid circulation at the bottom of the flat grinding shoe, of which 6 ring-shaped milling water holes a...

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Abstract

The invention provides a special efficient grinding shoe for drift-diameter bridge plugs. The special efficient grinding shoe comprises a body, a six-section grinding and milling inclined body, YG (tungsten-cobalt) hard alloy blocks and a reverse guide milling and grinding body, wherein one end of the body is connected to the reverse guide milling and grinding body; the reverse guide milling and grinding body is connected to the six-section grinding and milling inclined body; the bottom of the six-section grinding and milling inclined body is provided with seven channels capable of allowing a liquid to circulate; the six channels which are uniformly distributed in a ring-shaped mode are grinding and milling water holes, and the middle channel is a flushing water hole; and a plurality of layers of YG hard alloy blocks are uniformly laid between the six-section grinding and milling inclined body and the reverse guide milling and grinding body by welding. The special efficient grinding shoe can be used for quickly drilling bridge plugs with drift diameters, so that quick drilling among a plurality of bridge plugs is realized. The special efficient grinding shoe can be used for solving the technical problem that the construction efficiency is relatively low due to the fact that fragments and settlings on the lower parts of the bridge plugs cannot quickly go upwards and cannot be deposited.

Description

technical field [0001] The invention relates to a special high-efficiency grinding and milling tool used for drilling and grinding fast-drilling bridge plugs with a diameter. Background technique [0002] In oil and gas field reservoir stimulation technology, there is a hydraulic pumping fast drilling bridge plug fracturing technology. After the stimulation is completed, all the bridge plugs need to be drilled out with grinding shoes to establish inter-stage oil and gas passages. The diameter of fast-drilling bridge plugs usually has a relatively large diameter after the fracturing operation is completed. The existing conventional milling shoes are distributed in a circular distribution, which cannot effectively clean the sediments below the bridge plug, which affects the drilling efficiency; The milling part mainly adopts surfacing welding carbide particles, and the milling efficiency is low. At present, the fast drilling bridge plugs with large diameters are mainly made o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B29/00
CPCE21B29/00
Inventor 胡相君李宪文付钢旦王效明李旭梅王尚卫白小佩张安康王治国邵媛安杰张雄涛
Owner PETROCHINA CO LTD
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