Blocking tool in oil pipe

Abstract

The invention discloses a blocking tool in an oil pipe for operation under pressure. A deblocking spear rod is arranged in a central pipe in a penetrating manner; an unsealing pin is fixed on the upper end cap, and the upper end cap is fixed on the central pipe; a sealing rubber cylinder is limited on the central pipe by a rubber cylinder gland; the central pipe is a hollow pipe body; a linkage plunger is arranged in the lower end of the central pipe in a penetrating mode and is sealed to form a sealed cavity; a first connecting shaft penetrates through a through hole of a rubber sleeve expansion sealing push ring, a first key groove type through hole and a through hole of the linkage plunger, and is fixed connected with the rubber sleeve expansion sealing push ring; the rubber cylinder expansion sealing push ring and the linkage plunger are connected and move synchronously; an anchor tile conical base is sleeved and fixed on the central pipe through a locking pin, a setting pin limitsrelative movement of the linkage plunger and the central pipe, a slip is embedded between the anchor tile conical base and the conical body, and a second connecting shaft penetrates through a throughhole of an anchor tile propelling ring, a second key groove type through hole and a through hole of the linkage plunger to be fixedly connected with an anchor tile propelling ring. According to the invention, the self-setting can be realized, and the salvage can also be realized.

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...

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

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