A multifunctional wellhead device

A wellhead device and multi-functional technology, which is applied in the direction of drilling equipment, wellbore/well components, drilling pipes, etc., can solve problems such as collision between elevators and lifting rings, inconvenience for operators, occupation of workover vehicles, etc., to prevent collision damage and Tripping, convenient for workers to operate, and the effect of reducing labor intensity

Active Publication Date: 2019-02-12
王海荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Experimental program
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Effect test

Embodiment 1

[0019] A multifunctional wellhead device, mainly composed of a gland 2, a pressure ring 3, a three-lobed conical slip 4, and a slip seat 5; Threaded connection, the upper part of the gland 2 is designed with a through hole, the outer surface of the three-lobed conical slip 4 is conical and designed to match the inner tapered hole of the slip seat 5, and the pressure ring 3 is installed on the between the gland 2 and the three-lobe tapered slip 4; install and fix the device on the wellhead casing string 6 with jackscrews, put the adjustment guide tube 1a in from the top, and adjust to a suitable operation After tightening the gland 2, the three-lobed conical slip 4 is The three-lobed conical slip realizes self-locking under the tightening force of the gland 2, and firmly clamps the adjustment guide tube 1a; the upper part of the adjustment guide tube 1a is designed with a tapered guide slope, and the adjustment guide tube 1a for Adjust the guide tube. There is a gap of abou...

Embodiment 2

[0021] A multifunctional wellhead device, mainly composed of a gland 2, a pressure ring 3, a three-lobed conical slip 4, and a slip seat 5; the lower part of the gland 2 is designed with internal threads and the external thread of the slip seat 5 connection, the upper part of the gland 2 is designed with a through hole, the outer surface of the three-lobed conical slip 4 is conical and designed to match the inner tapered hole of the slip seat 5, and the pressure ring 3 is installed on the between the gland 2 and the three-lobed conical slips 4; Three-lobed conical slips, lift the tubing string 1b to a certain tonnage and then tighten the gland 2, the three-lobed conical slips 4 realize self-locking under the tightening force of the gland 2, and firmly clamp the tubing string 1b. Suspend the tubing string on the wellhead. The tubing string 1b is a 2-7 / 8 tubing string; the lower part of the gland 2 is designed with an internal thread to connect with the external thread of the s...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B19/24E21B33/03E21B19/10
CPCE21B19/10E21B19/24E21B33/03
Inventor 王海荣苟波王延平
Owner 王海荣
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