Oil pipe hanger capable of adjusting deviation

Abstract

The utility model discloses a deviation-adjustable tubing hanger, and relates to the technical field of oil production wellheads. The upper portion of the core pipe is provided with a section of step shaft with an enlarged diameter, a sealing seat is sleeved on the core pipe and is in clearance fit with the core pipe through a sealing ring, the upper portion of the sealing seat abuts against the step shaft, the core pipe is in threaded connection with a guide sleeve on the lower portion of the sealing seat, the guide sleeve is in clearance fit with a main channel of a tubing head four-way joint, and the guide sleeve is made of soluble metal. The utility model has the beneficial effects that the guide sleeve is arranged on the lower side of the sealing seat, and when the tubing hanger is tripped into the tubing head four-way joint, the guide sleeve is aligned with the main channel of the tubing head four-way joint, so that the tubing hanger is also aligned with the conical hole of the tubing head four-way joint, and the oil sleeve is sealed without damaging the sealing ring; the damping buffer effect is achieved, and the integrity of the sealing face is further protected.

Description

Technical Field

[0001] This utility model relates to the field of oil wellhead technology, and in particular to an adjustable deflection tubing hanger. Background Technology

[0002] A tubing hanger is a device that supports the tubing string and seals the annular space between the tubing and the casing. In use, the tubing hanger is first fixedly assembled onto the tubing, and then lowered into the tubing head four-way valve along with the tubing. The tubing hanger seals by using the weight of the tubing to sit into the conical hole of the tubing head four-way valve to achieve a seal on the tubing-casing annulus. Because the tubing string is not easily centered during installation, misalignment can easily damage the sealing annular surface of the tubing hanger and the tubing head four-way valve, leading to rework, which is not only inefficient but also labor-intensive. Utility Model Content

[0003] To address the problem of easily damaging the sealing ring during the installation of oil pipe hangers, this invention provides an adjustable oil pipe hanger.

[0004] The technical solution provided by this utility model is: an adjustable deflection oil pipe hanger, including a body, an inner hole of which is machined with an oil pipe thread, a core tube on the outside of the body, a stepped shaft with an enlarged diameter on the upper part of the core tube, a sealing seat on the core tube, the sealing seat and the core tube being fitted with a sealing ring through a clearance fit, the outer side of the sealing seat having a conical annular surface that fits with the conical hole of the oil pipe head four-way, the upper part of the sealing seat abutting against the stepped shaft, the core tube being threadedly connected to a guide sleeve at the lower part of the sealing seat, the guide sleeve being fitted with the main channel of the oil pipe head four-way through a clearance fit, and the guide sleeve being made of soluble metal.

[0005] The guide sleeve has an annular groove on its outer circumference, and a rubber sleeve is installed inside the annular groove. The rubber sleeve has a hollow structure, and its outer circumference protrudes from the guide sleeve. The rubber sleeve is made of soluble rubber.

[0006] An annular groove is machined on the stepped shaft, and the position of the groove corresponds to the set screw of the four-way connector of the oil pipe head.

[0007] The beneficial effects of this utility model are as follows: the tubing hanger is divided into two parts: the main body and the sealing seat. The sealing seat can be replaced separately, reducing maintenance costs. A guide sleeve is set on the lower side of the sealing seat. When the tubing hanger is lowered into the tubing head four-way connector, the guide sleeve is aligned with the main channel of the tubing head four-way connector, so that the tubing hanger is also aligned with the conical hole of the tubing head four-way connector, thereby achieving tubing sleeve sealing without damaging the sealing ring surface. A rubber sleeve is set, which plays a damping and buffering role when the tubing hanger is lowered into the tubing head four-way connector, further protecting the integrity of the sealing surface. During wellhead production, the liquid dissolves the guide sleeve and the rubber sleeve, without affecting normal wellhead production. Attached Figure Description

[0008] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0009] Appendix Figure 2 This is a schematic diagram of the structure of the main body in this utility model;

[0010] Appendix Figure 3 This is an installation diagram of this utility model.

[0011] In the diagram, 1-body, 101-stepped shaft, 102-core tube, 103-groove, 2-sealing seat, 3-guide sleeve, 4-rubber sleeve, 5-oil pipe head four-way connector, 501-main channel, 502-conical hole, 6-set screw. Detailed Implementation

[0012] like Figures 1-3 As shown, an adjustable deflection oil pipe hanger includes a body 1, with an oil pipe thread machined in the inner hole of the body 1. The outer side of the body 1 is a core tube 102. The upper part of the core tube 102 has a stepped shaft 101 with an enlarged diameter. A sealing seat 2 is fitted on the core tube 102. The sealing seat 2 is in clearance fit with the core tube 102 through a sealing ring. The outer side of the sealing seat 2 has a conical annular surface that mates with the conical hole 502 of the oil pipe head four-way 5. The upper part of the sealing seat 2 abuts against the stepped shaft 101. The core tube 102 is threadedly connected to a guide sleeve 3 at the lower part of the sealing seat 2. The guide sleeve 3 is in clearance fit with the main channel 501 of the oil pipe head four-way 5. The guide sleeve 3 is made of soluble metal.

[0013] The guide sleeve 3 has an annular groove on its outer circle, and a rubber sleeve 4 is installed in the annular groove. The rubber sleeve 4 is a hollow structure and is easily compressed. The outer circle of the rubber sleeve 4 protrudes from the guide sleeve 3. The rubber sleeve 4 is made of soluble rubber.

[0014] The tubing hanger is divided into two parts: the main body 1 and the sealing seat 2. The sealing seat 2 can be replaced separately to reduce maintenance costs. A guide sleeve 3 is set on the lower side of the sealing seat 2. When the tubing hanger is lowered into the tubing head four-way 5, the guide sleeve 3 is aligned with the main channel 501 of the tubing head four-way 5, so that the tubing hanger is also aligned with the conical hole 502 of the tubing head four-way 5, thereby achieving tubing-sleeve sealing without damaging the sealing ring surface. A rubber sleeve 4 is set, which plays a damping and buffering role when the tubing hanger is lowered into the tubing head four-way 5, further protecting the integrity of the sealing surface. During production, the liquid will dissolve the guide sleeve 3 and the rubber sleeve 4 without affecting the normal production at the wellhead.

[0015] An annular groove 103 is machined on the stepped shaft 101, and the position of the groove 103 corresponds to the set screw 6 of the oil pipe head four-way 5.

Claims

1. An adjustable bias oil pipe hanger, comprising a body (1), characterized in that: The inner hole of the body (1) is machined with oil pipe threads. The outer side of the body (1) is a core tube (102). The upper part of the core tube (102) has a stepped shaft (101) with an enlarged diameter. A sealing seat (2) is fitted on the core tube (102). The sealing seat (2) is in clearance fit with the core tube (102) through a sealing ring. The outer side of the sealing seat (2) has a conical annular surface that matches the conical hole (502) of the oil pipe head four-way (5). The upper part of the sealing seat (2) rests on the stepped shaft (101). The core tube (102) is threaded to the lower part of the sealing seat (2) with a guide sleeve (3). The guide sleeve (3) is in clearance fit with the main channel (501) of the oil pipe head four-way (5). The guide sleeve (3) is made of soluble metal.

2. The adjustable deflection oil pipe hanger according to claim 1, characterized in that: The guide sleeve (3) has an annular groove on its outer circle, and a rubber sleeve (4) is installed in the annular groove. The rubber sleeve (4) is a hollow structure, and the outer circle of the rubber sleeve (4) protrudes from the guide sleeve (3). The rubber sleeve (4) is made of soluble rubber.

3. The adjustable deflection oil pipe hanger according to claim 1, characterized in that: An annular groove (103) is machined on the stepped shaft (101), and the position of the groove (103) corresponds to the set screw (6) of the oil pipe head four-way (5).

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