CN216477242U

CN216477242U - Novel jackscrew

Info

Publication number: CN216477242U
Application number: CN202122674203.7U
Authority: CN
Inventors: 张祥; 史成军; 成武; 施培军
Original assignee: Yancheng Shenhua Machinery Manufacturing Co ltd
Current assignee: Yancheng Shenhua Machinery Manufacturing Co ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-05-10
Anticipated expiration: 2031-11-04

Abstract

The utility model relates to the technical field of Christmas trees, in particular to a novel jackscrew, which comprises: the method comprises the following steps: the jackscrew is in threaded connection with the inside of the casing head, and a jackscrew contact of the jackscrew is abutted to the hanger assembly; the locking assembly is arranged on the surface of the jackscrew and comprises a packing gland; the beneficial effects are that: according to the novel jackscrew provided by the utility model, the original jackscrew thread is pushed backwards, the packing gland is additionally arranged, the inner side of the packing gland is provided with the packing gland inner thread, the packing gland inner thread is meshed with the jackscrew thread on the surface of the jackscrew, and then the packing gland outer thread on the periphery of the packing gland is meshed with the thread arranged in the jackscrew hole, so that the internal pressure acting force borne by the jackscrew thread is changed into the internal pressure acting force borne by the packing gland, the bearing area of the packing gland is relatively large, the borne internal pressure acting force is correspondingly increased, and the sealing reliability is ensured.

Description

Novel jackscrew

Technical Field

The utility model relates to the technical field of Christmas trees, in particular to a novel jackscrew.

Background

At present, most oil pipe heads of wellhead devices at home and abroad adopt a mushroom head suspension mode, the suspension mode needs to be matched with a proper jackscrew mechanism, and the mushroom head jackscrew mainly bears wellhead internal pressure and the jacking force of a pipe column in the actual working process. Normally, the tubing string is mainly subjected to the action of gravity, so the mushroom head jackscrew mechanism is mainly subjected to the action of pressure in a wellhead.

In the actual production process, because the material selection and the mechanism are unreasonable, the problems of jackscrew part leakage and thread gluing often occur, and most of jackscrew positions are leaked to cause that the jackscrew cannot bear the internal pressure of a wellhead, so the utility model provides a novel jackscrew to solve the problems.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a novel jackscrew to solve the above problems of the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: a novel jackscrew is characterized in that: the novel jackscrew comprises: the jackscrew is in threaded connection with the inside of the casing head, and a jackscrew contact of the jackscrew is abutted to the hanger assembly;

the lock catch component is arranged on the surface of the jackscrew and comprises a packing gland.

Preferably, the upper end face of the casing head is provided with multiple groups of jackscrew holes, and the multiple groups of jackscrew holes are annularly and symmetrically distributed by taking the casing head as the center.

Preferably, the screw thread is arranged inside the jackscrew hole, the jackscrew is sleeved inside the jackscrew hole, and jackscrew contacts of the multiple groups of jackscrews are abutted against the surface of the hanger assembly.

Preferably, the surface of the jackscrew is in stepped connection, the jackscrew thread is arranged at the middle section of the jackscrew, the surface of the jackscrew is sleeved with the filler, and the filler is positioned between the jackscrew thread and the jackscrew contact.

Preferably, both ends of the filler are respectively provided with a lower filler backing ring and an upper filler backing ring.

Preferably, the inside of the packing gland is provided with a packing gland internal thread matched with the jackscrew thread, the outer surface of the packing gland is provided with a packing gland external thread, and the packing gland external thread is matched with the jackscrew hole internal thread.

Preferably, one end of the packing gland, which is far away from the jackscrew contact, is sleeved with a sealing ring, and the sealing ring is positioned between one end of the jackscrew, which is far away from the jackscrew contact, and the packing gland.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the novel jackscrew, the original jackscrew thread is pushed backwards, a packing gland is additionally arranged, a packing gland internal thread is arranged on the inner side of the packing gland, the packing gland internal thread is meshed with the jackscrew thread on the surface of the jackscrew, and then the packing gland external thread on the periphery of the packing gland is meshed with the thread arranged in the jackscrew hole, so that the internal pressure acting force borne by the jackscrew thread can be changed into the internal pressure acting force borne by the packing gland, the bearing area of the packing gland is relatively large, the borne internal pressure acting force can be correspondingly increased, and the sealing reliability is guaranteed;

2. according to the novel jackscrew, the threads are pushed backwards, so that corrosion of sundries to the meshed threads can be reduced, meanwhile, the filler is additionally arranged between the threaded jackscrew contact and the filler gland to further protect the meshed threads, and meanwhile, the lower filler backing ring and the upper filler backing ring are arranged at the two ends of the filler to better protect the filler.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic diagram of a semi-exploded configuration of the jackscrew of the present invention;

fig. 4 is a schematic view of the packing gland structure of the present invention.

In the figure: the device comprises a casing head body 1, a hanger assembly 2, a screw hole 3, a screw 4, a packing gland 5, a packing 6, a packing backing ring 7, an upper packing backing ring 8, a screw thread 9, a screw thread 10, a sealing ring 11, a screw thread 12 and a screw contact 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a technical solution: a novel jackscrew, novel jackscrew includes: the jackscrew 4 is screwed inside the casing head 1, the upper end face of the casing head 1 is provided with jackscrew holes 3, the jackscrew holes 3 are provided with a plurality of groups, the plurality of groups of jackscrew holes 3 are annularly and symmetrically distributed by taking the casing head 1 as the center, a thread is formed in the jackscrew hole 3, jackscrews 4 are sleeved in the jackscrew hole 3, jackscrew contacts 13 of multiple groups of jackscrews 4 are abutted to the surface of the hanger assembly 2, the surface of the jackscrews 4 is in stepped connection, jackscrew threads 9 are formed in the middle sections of the jackscrews 4, a filler 6 is sleeved on the surface of the jackscrews 4, the filler 6 is located between the jackscrew threads 9 and the jackscrew contacts 13, a lower filler backing ring 7 and an upper filler backing ring 8 are respectively arranged at two ends of the filler 6, a sealing ring 11 is sleeved at one end, away from the jackscrew contacts 13, of the packing gland 5, and the sealing ring 11 is located between one end, away from the jackscrew contacts 13, of the jackscrews 4 and the packing gland 5;

the hasp subassembly, the hasp subassembly sets up on the surface of jackscrew 4, and the hasp subassembly includes gland 5, gland 5's inside seted up with jackscrew 9 assorted gland internal thread 12, and gland 5's surface has seted up gland external screw thread 10, gland external screw thread 10 and the 3 internal screw thread phase-matchs in jackscrew hole.

The working principle is as follows: during actual use, firstly, a lower packing backing ring 7 is sleeved on the surface of a jackscrew 4, then a packing 6 and an upper packing backing ring 8 are sequentially sleeved in the jackscrew 4 and are close to a jackscrew contact 13, then a packing gland 5 is sleeved in the jackscrew 4, the packing gland 5 rotates along a jackscrew thread 9, so that the packing 6, the lower packing backing ring 7, the upper packing backing ring 8 and one end of the packing gland 5 are tightly attached, then the jackscrew 4 and the packing gland 5 are inserted into a jackscrew hole 3 together, the packing gland 5 is rotated, external threads 10 of the packing gland on the surface of the packing gland 5 rotate along threads arranged in the jackscrew hole 3, so that the end part of the jackscrew contact 13 is tightly attached to the surface of a hanger assembly 2, and finally a sealing ring 11 is sleeved between the jackscrew 4 and the packing gland 5.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A novel jackscrew is characterized in that: the novel jackscrew comprises: the jackscrew (4), the jackscrew (4) is screwed in the interior of the casing head (1), and a jackscrew contact (13) of the jackscrew (4) is abutted with the hanger assembly (2);

the locking assembly is arranged on the surface of the jackscrew (4) and comprises a packing gland (5).

2. The novel jackscrew of claim 1, wherein: the upper end face of the casing head (1) is provided with a plurality of groups of jackscrew holes (3), and the multiple groups of jackscrew holes (3) are annularly and symmetrically distributed by taking the casing head (1) as the center.

3. The novel jackscrew of claim 2, wherein: the internal part of the jackscrew hole (3) is provided with threads, the jackscrew (4) is sleeved in the jackscrew hole (3), and jackscrew contacts (13) of a plurality of groups of jackscrews (4) are abutted against the surface of the hanger assembly (2).

4. The novel jackscrew of claim 3, wherein: the surface of jackscrew (4) is cascaded connection, and jackscrew screw thread (9) have been seted up to the interlude of jackscrew (4), and the surface cover of jackscrew (4) is equipped with filler (6), and filler (6) are in between jackscrew thread (9) and jackscrew contact (13).

5. The novel jackscrew of claim 4, wherein: and a lower packing backing ring (7) and an upper packing backing ring (8) are respectively arranged on two sides of the packing (6).

6. The novel jackscrew of claim 1, wherein: the packing gland is characterized in that a packing gland internal thread (12) matched with the jackscrew thread (9) is formed in the packing gland (5), a packing gland external thread (10) is formed in the outer surface of the packing gland (5), and the packing gland external thread (10) is matched with the internal thread of the jackscrew hole (3).

7. The novel jackscrew of claim 6, wherein: the end, far away from jackscrew contact (13), of gland (5) is equipped with sealing washer (11), and sealing washer (11) are located jackscrew (4) and are kept away from between the one end of jackscrew contact (13) and gland (5).