A semi-sealing sealer for oil well fracturing

Abstract

The invention relates to the technical field of petroleum exploitation, and discloses a semi-sealing sealer for oil well fracturing. Rolling bearings are installed on the extensions of the active rolling pins and passive rolling pins, the active rolling pins and passive rolling pins are installed with the shell through rolling bearings, and the tops of the active rolling pins and passive rolling pins are engaged with transmission discs, so The bottom of the transmission disc is provided with embossed lines. The semi-sealing sealer for oil well fracturing, through the cooperation of the active rolling pin and the driving disc, can drive the driving disc to rotate when the active rolling pin is turned, and the arc-shaped sealing core at the top can be driven by the driving disc through the locking teeth. The cores move towards each other, so as to achieve the effect of opening or closing. In this process, only one active rolling pin needs to be turned to realize the linkage of the two arc-shaped sealing cores. Compared with operating two screw rods at the same time, no skill is required. And more convenient and practical.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to a semi-sealing and sealing device for oil well fracturing. Background technique [0002] In the field of oil exploitation, fracturing is usually used to increase oil production, and at the wellhead of the oil well, a well sealer is required to seal and isolate the environment inside the well from the outside environment, so as to prevent waste caused by accidental spillage of oil. [0003] see Figure 1-2 , the existing semi-sealed sealer structure includes a shell 1, four threaded holes 2 are symmetrically arranged on the front of the shell 1, and a movable chamber 3 is provided on the top of the shell 1, and a half-sealed core assembly is slidably installed inside the movable chamber 3. 4, both sides of the shell 1 are provided with bearing sleeves 5, both ends of the bearing sleeve 5 are provided with screw rods 6, and the middle part of the semi-sealed core assembly ...

AI Technical Summary

Problems solved by technology

[0004] The problems existing in the existing semi-sealed well sealer include: 1. In the cold winter, the internal rainwater of the well sealer freezes, and it is necessary to use high-temperature steam to heat the screw mandrel 6 before turning it, otherwise it is easy to cause the screw mandrel to be pulled off, so the working efficiency Low; 2. The operation of the screw rod 6 is cumbersome, and the two screw rods 6 need to be rotated at the same time, and the number of rotations is 9.5. If the rotation is not synchronized, the oil well will not be well sealed, and the well fluid may overflow; 3. Due to the half-sealed core The sub-assembly 4 is located inside the movable chamber 3. If the screw rod 6 is not rotated in place, it is easy to cause the drilling tool to scratch the semi-seal core assembly 4, which will affect the sealing.

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