Switching type tubing pump blanking plug

Abstract

The invention discloses a switching type tubing pump blanking plug. The switching type tubing pump blanking plug comprises an upper connector, a connecting body, a lower connector and a central tube. The upper end of the central tube is arranged inside the upper connector in sleeving mode. The inner wall of the upper connector is two-step-typed. A snap ring is fixed on the central tube, and a track sleeve is arranged between the snap ring and a lug boss arranged on the two-step position of the inner wall of the upper connector. The upper connector is provided with a track pin matched with a track of the track sleeve. The outside of the lower end of the central tube is provided with a switch sleeve in a sleeving mode. Multiple oil inlet holes are formed in the switch sleeve. A spring is arranged between the switch sleeve and the snap ring in a sleeving mode. The connecting body is arranged outside the spring, and one end of the connecting body is connected with the upper connector in a threaded mode. The lower connector is connected with the connecting body is a threaded mode, and is connected with the switch sleeve in a matched mode. The switching type tubing pump blanking plug is installed between a pump cylinder coupling and a fixing valve, and opening and closing of the switching type tubing pump blanking plug is controlled by lowering a sucker rod, so that occurrence of the well kick and blowout accident is prevented during well workover treatment, and the non-well-killing well workover treatment is achieved.

Description

technical field [0001] The invention belongs to the technical field of snubbing and workover, and in particular relates to a switch-type tubular pump plug. Background technique [0002] At present, major oilfields generally adopt snubbing workover technology to carry out workover operations on oil wells. During tripping operations, well kicks and blowout accidents may be caused due to excessive formation pressure. Most domestic oilfields first lift the sucker rod string out of the oil well, and then put the plug into the well to prevent blowout. After the workover operation is completed, when the oil production operation will be carried out, the plug will be taken out from the well with an overshot earlier, and then the sucker rod string will be lowered. Like this, just there is the danger of blowout when putting in and salvaging plug, meanwhile, putting in and salvaging plug is also very time-consuming and laborious operation, can prolong the time of workover operation, th...

AI Technical Summary

Problems solved by technology

In this way, there is a risk of blowout when putting in and pulling out the plug. At the same time, putting in and pulling out the plug is also a time-consuming and laborious operation, which will prolong the workover time and affect the normal production of the oil well.

From two aspects of safety and economic benefits, this operation is unreasonable

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