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Oil pipe plugging tool

A technology for oil pipes and tools, which is applied in the field of plugging tools in oil pipes. It can solve the problems of large plugging depth error, seat hanging, and unrecoverable, etc., and achieves the effects of adjustable seat hanging depth, good stability, and good promotion value.

Active Publication Date: 2021-09-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] From a formal point of view, the internal plugging tool has been perfected and can basically meet the plugging needs of various pipe string structures. However, the internal plugging tool in the related art has a large error in plugging depth, hanging, poor sealing stability, and unrecoverable etc. Disadvantages, need further improvement and optimization

Method used

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  • Oil pipe plugging tool

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] like figure 1 As shown, the embodiment of the present invention provides a plugging tool for oil pipes under pressure, including an unsealing pin 1, an upper end cap 2, an unsealing lance 3, a rubber cylinder gland 4, a first sealing ring 5, Sealing rubber cylinder 6, central tube 7, linkage plunger 8, second sealing ring 9, rubber cylinder expansion sealing cone 10, rubber cylinder expansion sealing push ring 11, first connecting shaft 12, anchor shoe conical base 13, Locking pin 14, seat sealing pin 15, slips 16, cone 18, anchor shoe propulsion ring 19, second connecting shaft 20, variable diameter guide head 21.

[0025] Wherein, the unsealing lance 3 is worn in it from the upper end of the central tube 7, the unsealing pin ...

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PUM

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Abstract

The invention discloses an oil pipe internal plugging tool for working under pressure. The unsealing spear rod is installed in the center pipe, and fixed on the upper end cap through the unsealing pin, and the upper end cap is fixed on the center pipe. The sealing rubber cylinder is limited on the central tube, the central tube is a hollow tube body, the linkage plunger is installed in the lower end and sealed to form a sealed cavity, and the first connecting shaft passes through the through hole of the expansion sealing push ring of the rubber cylinder 1. The first keyway-type through hole and the through hole of the linkage plunger are fixedly connected with the expansion seal push ring of the rubber cylinder. The expansion seal push ring of the rubber cylinder is connected with the linkage plunger and moves synchronously. The conical base of the anchor tile is set by the locking pin And fixed on the center tube, the seat seal pin restricts the relative movement of the linkage plunger and the center tube, the slips are embedded between the anchor shoe conical base and the cone body, the second connecting shaft passes through the through hole of the anchor shoe propulsion ring, The second keyway type through hole and the through hole of the interlocking plunger are fixedly connected with the anchor tile propulsion ring. The invention can not only set and seal itself, but also realize salvage.

Description

technical field [0001] The invention relates to the technical field of pressurized operations, in particular to a plugging tool in an oil pipe. Background technique [0002] Snubbing operation of oil and gas wells refers to the workover operation carried out in the sealed state of the wellbore. The pressure of the operation process is controllable, non-polluting and beneficial to the protection of the reservoir. It is an environmentally friendly and pollution-free operation technology. With the oilfields attaching great importance to oil layer protection and environmental protection and the gradual improvement of snubbing technology, snubbing technology has developed rapidly, and there are more and more types of snubbing devices, for example, wire rope snubbing device, tripping device under pressure and skid-mounted hydraulic operation device under pressure, etc. During pressurized operation, the pressure of the oil and collar air is mainly controlled by the blowout prevent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/127E21B33/126
CPCE21B33/1265E21B33/127
Inventor 王健张康卫彭军张宏峰袁龙王小兵邹立业于峰姜艳
Owner PETROCHINA CO LTD
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