Triggered soluble blind plate for drilling

A triggering, drilling technology, applied in earth-moving drilling, wellbore/well components, sealing/packing, etc., can solve problems such as stuck drilling, long operation time, blowout, etc., and achieve the effect of improved reliability and simple structure

Inactive Publication Date: 2019-12-10
DAQING OILFIELD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of blind plate has the problem of low drilling and milling efficiency, not only the operation time is long, but also engineering accidents such as drill sticking and blowout may occur during the operation process

Method used

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  • Triggered soluble blind plate for drilling

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Effect test

specific Embodiment approach

[0013] Specific embodiments: The present invention will be further described in detail below in conjunction with the accompanying drawings, which consists of an upper baffle 1, an O-ring 2, an upper joint 3, an anti-rotation pin 4, a lower baffle 5, and a lower joint 6; wherein the upper baffle 1 is threadedly connected with upper joint 3 and sealed by O-ring 2; upper joint 3 is threaded with lower joint 6 and sealed by O-ring 2; upper joint 3 and lower joint 6 are fixedly connected by anti-rotation pin 4; The baffle 5 is inserted into the lower joint 6 and sealed by the O-ring 2 .

[0014] The upper baffle plate 1 is a corrosion-resistant and easy-to-drill polymer material.

[0015] The lower baffle 5 is a magnesium-based soluble alloy material, and the lower end of the lower baffle 5 is sprayed with a corrosion-resistant polytetrafluorocoating 8 .

[0016] A hydraulic cavity 7 is opened inside the upper joint 3 .

[0017] When used on site, after the drilling is completed,...

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Abstract

The invention relates to the technical field of oilfield drilling and production engineering, belonging to a triggered soluble blind plate for drilling. The invention solves the problem of the old-style blind plate caused by long-time drilling and milling after the use. The triggered soluble blind plate for drilling consists of an upper baffle (1), an O-ring (2), an upper joint (3), an anti-rotation pin (4), a lower baffle (5), and a lower joint (6); and the triggered soluble blind plate for drilling has the advantages of simple structure, safety and reliability, prevention of out-of-control blowout when drilling a blind plate, and the like.

Description

technical field [0001] The invention relates to the technical field of oil field drilling and production engineering, and belongs to a trigger type soluble blind plate for drilling. Background technique [0002] At present, the blind plate used in the drilling site is made of aluminum base, which prevents cement from entering the inside of the casing when the upper well section is cemented. After the cementing is complete, it needs to be drilled out to restore the production channel. This kind of blind plate has the problem of low drilling and milling efficiency, not only the operation time is long, but also engineering accidents such as drill sticking and blowout may occur during the operation process. Contents of the invention [0003] The purpose of the present invention is to provide a trigger type soluble blind plate for drilling which has a simple structure, short drilling and milling time after use, and can prevent the trigger type soluble blind plate from blowout ...

Claims

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Application Information

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IPC IPC(8): E21B33/13
CPCE21B33/13
Inventor 王凤山王林艾兴波刘春生许浩林忠超
Owner DAQING OILFIELD CO LTD
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