Slider type throwing bridge plug

A slideway-type, drop-off technology, which is applied in wellbore/well components, earthwork drilling, sealing/isolation, etc., can solve problems such as low suspension capacity, early drop-off pressure, etc., to improve water shutoff and The efficiency of sealing the well, eliminating the effect of losing hands in advance and avoiding waste

Active Publication Date: 2017-07-07
MUDANJIANG JINGTIAN OIL DRILLING ACCESSORIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a slideway type drop-off bridge plug, which solves the problems of low suspension capacity, early drop-off and high drop-off pressure in current bridge plugs

Method used

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  • Slider type throwing bridge plug
  • Slider type throwing bridge plug
  • Slider type throwing bridge plug

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Embodiment Construction

[0015] The technical scheme of the present invention will be further described below in conjunction with accompanying drawing, but should not be construed as limiting the present invention:

[0016] figure 1 It is the structural representation of the present invention Figure 1 , figure 2 It is the structural representation of the present invention Figure II , image 3 yes figure 1 Schematic diagram of the structure of the middle and upper central tube, Figure 4 yes image 3 A cross-sectional view in the direction of A-A, Figure 5 It is a schematic diagram of laying the outer wall of the upper central tube. As shown in the figure, a slideway-type drop-in bridge plug includes an upper joint 1, a connecting head 2, an upper central tube 3, a fishing head 4, a retaining spring 5, and a working cylinder 6 , upper connecting sleeve 7, unsealing pin 8, throwing hands 9, sliding pin 10, setting piston 11, locking block 1 12, setting pin 13, locking block 2 14, rubber cylin...

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Abstract

The invention relates to a sliding way type releasing bridge plug. A long sliding way and a short sliding way are formed in the outer wall of the lower portion of an upper center pipe, the short sliding way is obliquely arranged and is communicated with the long sliding way into a V shape, the bottom end of the long sliding way directly penetrates through the bottom of the upper center pipe, and the end of a sliding pin is arranged in the short sliding way and can slide in the long sliding way and the short sliding way. According to the sliding way type releasing bridge plug, the defects of releasing achieved by shearing a pin under the condition of high pressure or heavy-load lifting are overcome, the principle that pin suspension is fixed through heavy load, and releasing is achieved without a power sliding way is adopted, it is ensured that an anchor is released at the right position, the situation that releasing is conducted too early is avoided, water plugging and well shutting efficiency is improved, and unnecessary waste is avoided.

Description

technical field [0001] The invention belongs to the field of downhole tools for oilfields, and relates to a slideway type throw-away bridge plug. Background technique [0002] Conventional water plugging bridge plugs are discarded by shearing pins during use. Due to the low suspension capacity, it is easy to lose hands in advance, and at the same time, lifting the pipe string under high pressure or heavy load to cut the pins is used to achieve loss of hands, so the pressure to lose hands is relatively high. High, due to the above shortcomings, the tool often has accidents of water plugging or well sealing failure, resulting in a decrease in oil layer productivity, and at the same time causing a long time to occupy the well, affecting the operating timeliness and directly losing operating costs and material costs. Therefore, need to carry out further improvement to existing bridge plug shearing pin. Contents of the invention [0003] The purpose of the present invention is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/134
Inventor 栾德民
Owner MUDANJIANG JINGTIAN OIL DRILLING ACCESSORIES CO LTD
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