A multifunctional wellhead device

Abstract

The invention discloses a multifunctional well head device. The multifunctional well head device is mainly composed of a gland, a pressing ring, a three-section conical slip and a slip bowl. An inner thread is designed at the lower portion of the gland and matched with an outer thread of the slip bowl. A through hole is designed in the upper portion of the gland. The outer surface of the three-section conical slip is in conical design and is matched with an inner conical hole of the slip bowl. The pressing ring is arranged between the gland and the three-section conical slip. The multifunctional well head device is fixed to a well head casing pipe column. On the basis of one set of device, well head height adjustment, oil pipe centralizing and oil pumping pipe column hanging functions can be achieved only by replacing conical slips of different specifications, and a plurality of problems existing in well repairing work are solved. Using is convenient, the work efficiency and the well repairing quality are improved, and safety of the well repairing work process is guaranteed. The problem that no special well head devices exist for the well repairing work for a long time is solved, the multifunctional well head device can serve as standard configuration for a well head during well repairing work, and the positive promoting function is achieved for improving the standardization of the well repairing work.

Description

technical field [0001] The invention relates to the technical field of oil field workover, in particular to a multifunctional wellhead device. Background technique [0002] Because the height of the wellhead of the oil well is different from the ground, and some wellheads are already lower than the ground, it is extremely inconvenient for personnel to operate when lifting and lowering the tubing string in oil field workover operations, and the following problems often occur: 1. The height of the wellhead cannot fully conform to the normal ergonomics The operating height brings great inconvenience to the operator. 2. When running down the tubing, the tubing coupling is likely to collide with the inner wall of the casing coupling, causing thread damage. Sometimes the tubing coupling collides with the upper plane of the casing coupling, resulting in accidents such as tubing tripping or elevator and ring collision. 3. After downhole fracturing, accidents such as the packer not ...

AI Technical Summary

Problems solved by technology

[0002] Because the height of the wellhead of the oil well is different from the ground, and some wellheads are already lower than the ground, it is extremely inconvenient for personnel to operate when lifting and lowering the tubing string in oil field workover operations, and the following problems often occur: 1. The height of the wellhead cannot fully conform to the normal ergonomics The operating height brings great inconvenience to the operator

2. When the tubing is running, the tubing coupling is likely to collide with the inner wall of the casing coupling, causing thread damage. Sometimes the tubing coupling collides with the upper plane of the casing coupling, resulting in accidents such as tubing tripping or elevator and ring collision.

3. After downhole fracturing, accidents such as the packer not shrinking or sand stuck occurred. When the workover vehicle pulled out the tubing packer in the accident well, sometimes it could only move out a few meters or even tens of centimeters before it got stuck. Unable to move, the workover vehicle can only be used to exert a certain lifting force on the pipe string, and continue to lift the pipe string after the packer is decompressed. During this period, it will take several hours or even days, and the workover vehicle will be occupied for a long time, making it impossible to continue other operations

If the vehicle leaves, the well cannot be closed, and passers-by or children may throw debris into the well, causing secondary accidents

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