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Small-diameter hydrostatic setting plug

A hydrostatic, sealing and plugging technology, applied in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve the problems of plugging failure, difficulty in delivery, etc., achieve high setting pressure, overcome delivery Not in place, good sealing effect

Active Publication Date: 2014-08-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the type of oil pipe plug commonly used in China is difficult to put in place, making the plugging failure

Method used

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  • Small-diameter hydrostatic setting plug
  • Small-diameter hydrostatic setting plug

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Embodiment 1

[0017] Embodiment 1: Taking a small-diameter hydrostatic setting plug as an example, the present invention is further described in detail. The total length of the setting plug is 1050mm, the pressure difference is 25MPa, and the temperature resistance is 120°C.

[0018] The small-diameter hydrostatic setting plug of the present invention is mainly composed of a delivery connector 1, a hand shear nail 2, an upper joint 3, a center rod 4, a shock unsealing head 5, a slip assembly 6, and a sealing assembly 7 , locking assembly 8, outer core pipe 9, setting seal assembly 10 and guiding shoe 11 are formed.

[0019] refer to figure 1 . The delivery connector 1 has an external thread on the cylindrical upper end, and the delivery connector 1 upper end can be connected with a jar when going down to use. There is a center hole at the lower end of the delivery connector 1, and an upper joint 3 is arranged on the top of the center hole at the lower end of the delivery connector 1, and...

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Abstract

The invention relates to a small-diameter hydrostatic setting plug which is applied to the tubing plugging when the pressured operation is carried out on an oil and water well of an oilfield. The small-diameter hydrostatic setting plug comprises a delivery connector, a releasing shear pin, an upper connector, a center rod, a shock deblocking head, a slips assembly, a sealing assembly, a locking assembly, an external core pipe, a setting assembly and a guide shoe, wherein the annular shock deblocking head is sleeved on the wall of the center rod, the shock deblocking head is fixed on the center rod through setting shear pins, the external core pipe is sleeved on the external wall of the center rod, the upper end of the external core pipe is in threaded connection with the lower end of the shock deblocking head, and the slips assembly is fixed outside the external core pipe through fixing shear pins. The delivery is carried out through a steel wire, the setting of the plug is achieved by using tubing coupling gaps, the setting pressure is increased along with the increase of the static pressure of a setting position of the plug, the setting pressure is high, the setting is rapid, the capability of bearing pressure difference is strong, the shoulders of a sealing rubber tube adopt an elastic anti-bulge design, so that the requirements on small-diameter large pressure difference resistance are achieved, and the demands on pressured operation are met.

Description

technical field [0001] The invention relates to the technical field of oil production in oil fields, in particular to a special tool for oil pipe plugging in oil-water wells under pressure, which is a small-diameter hydrostatic setting plug. Background technique [0002] In order to maintain the energy of oilfield reservoirs, increase the production timeliness of oil and water wells, effectively avoid environmental pollution, and reduce the overall cost of operations, pressure operations are carried out on oil and water wells. At present, the key technology of domestic hot work process is the oil pipe plugging technology. The domestic commonly used oil pipe plugging technology one is the oil pipe plug that adopts the sucker rod to convey, and the other is the oil pipe plug that adopts hydraulic throttling setting. The tubing plug transported by the sucker rod tube takes a long time to occupy the well, has low efficiency and complicated operation, and the tubing plug set by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/1295
Inventor 韩新德王建宁王少波刘庆
Owner PETROCHINA CO LTD
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