CN219711482U

CN219711482U - Casing head

Info

Publication number: CN219711482U
Application number: CN202320420803.7U
Authority: CN
Inventors: 蒋光明; 秦楚雄; 秦志标
Original assignee: Jianhu Weiersen Pressure Equipment Co ltd
Current assignee: Jianhu Weiersen Pressure Equipment Co ltd
Priority date: 2023-03-08
Filing date: 2023-03-08
Publication date: 2023-09-19
Anticipated expiration: 2033-03-08

Abstract

The utility model discloses a casing head, which comprises a casing head body which is penetrated up and down, and a hanger connected in the casing head body, wherein an inner pipe is fixed in the casing head body, the upper end of the inner pipe is positioned below an opening at the top of the casing head body, a clamping rod is fixed on the side wall of the upper part of the inner pipe, the hanger comprises a cylinder body and a positioning disc fixed on the cylinder body, a plurality of upper screw holes are formed in the upper surface of the positioning disc, an inclined chute and a clamping groove communicated with the chute are formed in the side wall of the cylinder body, the clamping rod is slidably connected in the chute, the clamping rod can be clamped in the clamping groove by rotating the hanger, an external thread is formed in the outer wall of the cylinder body, the inner wall of the inner pipe is internally threaded with the internal thread, after the clamping rod is clamped in the clamping groove, the hanger is in threaded connection with the inner pipe, and the positioning disc abuts against the top of the inner pipe. The utility model can make the installation of the hanger and the casing head body more stable.

Description

Casing head

Technical Field

The utility model relates to the technical field of casing heads, in particular to a casing head.

Background

The casing head is a component for connecting a casing and various wellhead devices, is used for supporting the gravity of a technical casing and an oil layer casing, sealing an annular space between each layer of pipes, providing transitional connection for installing a blowout preventer, a tubing head and a christmas tree, and can carry out construction operations of supplementing and squeezing slurry, monitoring, filling balance liquid and the like through two side ports on the casing head body, and is widely used in the field of casing heads.

The casing head is internally connected with a hanger, and most of the prior hangers are connected with the casing head body in a threaded connection mode when being installed, and the connection mode has the following problems: (1) Because the hanger is heavy, if effective positioning is not carried out before connection, the hanger is easy to drop downwards or deviate when being connected, and is arranged in the casing head body, and when the hanger is inserted into the casing head body, the hanger is screwed without a fulcrum, so that unstable installation is easy to be caused; (2) The hanger is only in threaded connection with the casing head body, and unstable connection between the hanger and the casing head body can be caused.

Disclosure of Invention

In view of the shortcomings of the prior art, the present utility model provides a casing head to solve the problems mentioned in the background art.

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model provides a casing head, includes upper and lower link up casing head body, connects in the casing head body hanger, casing head body internal fixation has the inner tube, the upper end of inner tube is located casing head body open-ended below, be fixed with a draw-in lever on the lateral wall on inner tube upper portion, the hanger includes the barrel, is fixed in the positioning disk on the barrel, a plurality of upper screw holes have been seted up to the upper surface of positioning disk, be equipped with the spout of slope on the lateral wall of barrel, with the draw-in groove of spout intercommunication, draw-in lever sliding connection is in the spout, and rotate the hanger and enable the draw-in lever card to establish in the draw-in groove, the outer wall of barrel is equipped with the external screw thread, with the internal screw thread in the inner wall of inner tube, after the draw-in lever card is established in the draw-in groove, hanger and inner tube realization threaded connection, and positioning disk support the top of leaning on the inner tube.

Preferably, the inner wall of the hanger is also provided with internal threads, and the hanger is used for connecting pipelines outside the wellhead through the internal threads.

Preferably, the casing head body is connected with a gate valve through a pipeline, and one end of the gate valve is connected with a pressure gauge through a pipeline.

Preferably, the bottom of the inner pipe is provided with a plurality of lower screw holes, and the bottom surface of the inner pipe is used for connecting pipelines in a wellhead.

Preferably, the bottom of casing head body is connected with the supporting legs, the lower extreme of supporting legs is connected with the solid fixed ring.

Compared with the prior art, the utility model has the following beneficial effects: when the hanger is installed, the sliding groove of the hanger is aligned with the clamping rod, the clamping rod is clamped in the sliding groove to realize preliminary positioning of the hanger, then the hanger is inserted into the upper screw hole of the positioning disc through a tool, the hanger is screwed, the sliding groove is enabled to rotate along the clamping rod until the clamping rod is clamped in the clamping groove, at the moment, the hanger and the inner tube are in threaded connection due to rotation of the hanger, meanwhile, the positioning disc is just placed on the inner tube, the hanger is borne through the inner tube, stability of the hanger is improved, the hanger is prevented from being separated from or falling off, and the upper screw hole of the positioning disc can be installed with an external pipeline after the hanger is installed.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic illustration of the engagement of the hanger with the clamp bar;

in the figure: 1-casing head body, 2-hanger, 21-barrel, 22-positioning disk, 23-upper screw hole, 24-chute, 25-clamping groove, 3-inner tube, 4-clamping rod, 5-gate valve, 6-manometer, 7-lower screw hole, 8-supporting leg, 9-fixed ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, a casing head comprises a casing head body 1 penetrating up and down, and a hanger 2 connected in the casing head body 1, wherein an inner tube 3 is fixed in the casing head body 1, the upper end of the inner tube 3 is located below the top opening of the casing head body 1, a clamping rod 4 is fixed on the side wall of the upper portion of the inner tube 3, the hanger 2 comprises a cylinder 21 and a positioning disc 22 fixed on the cylinder 21, a plurality of upper screw holes 23 are formed on the upper surface of the positioning disc 22, an inclined chute 24 and a clamping groove 25 communicated with the chute are formed on the side wall of the cylinder 21, the clamping rod 4 is slidably connected in the chute 24, the clamping rod 4 can be clamped in the clamping groove 25 by rotating the hanger 2, external threads are formed on the outer wall of the cylinder 21, the inner wall of the inner tube 3 is internally threaded with the internal threads, after the clamping rod 4 is clamped in the clamping groove 25, the hanger 2 is in threaded connection with the inner tube 3, and the positioning disc 22 abuts against the top of the inner tube 3.

The inner wall of the barrel 21 of the hanger 2 is also provided with internal threads, and the hanger can be connected with a pipeline outside the wellhead through the internal threads of the barrel 21. The casing head is characterized in that the casing head body 1 is connected with a gate valve 5 through a pipeline, and one end of the gate valve 5 is connected with a pressure gauge 6 through a pipeline. The bottom of the inner pipe 3 is provided with a plurality of lower screw holes 7, and the inner pipe can be in butt joint with a pipeline in a wellhead through the lower screw holes 7 at the bottom of the inner pipe and fastened through bolts. The bottom of casing head body 1 is connected with supporting legs 8, the lower extreme of supporting legs 8 is connected with solid fixed ring 9.

The installation method of the utility model comprises the following steps:

when the hanger 2 is installed, the sliding groove 24 of the hanger 2 is aligned with the clamping rod 4, the clamping rod 4 is clamped in the sliding groove 24, the hanger 2 is initially positioned, then the tool is inserted into the upper screw hole 23 of the positioning disc 22, the hanger 2 is screwed, the sliding groove 24 rotates along the clamping rod 4 until the clamping rod 4 is clamped in the clamping groove 25, at the moment, the hanger 2 and the inner tube 3 are in threaded connection due to the rotation of the hanger 2, meanwhile, the positioning disc 22 is just arranged on the inner tube 3, the hanger 2 is borne through the inner tube 3, the stability of the hanger 2 is improved, the hanger is prevented from being separated from or falling off, and the upper screw hole 23 of the positioning disc 22 can be installed with an external pipeline after the hanger 2 is installed.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein 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. The utility model provides a casing head, includes upper and lower link up casing head body (1), connects hanger (2) in casing head body (1), its characterized in that, casing head body (1) internal fixation has inner tube (3), the upper end of inner tube (3) is located casing head body (1) open-ended below, be fixed with a draw-in bar (4) on the lateral wall on inner tube (3) upper portion, hanger (2) include barrel (21), are fixed in positioning disk (22) on barrel (21), a plurality of upper screw holes (23) have been seted up to the upper surface of positioning disk (22), be equipped with on the lateral wall of barrel (21) inclined spout (24), draw-in groove (25) with the spout intercommunication, draw-in bar (4) sliding connection is in spout (24), and rotate hanger (2) and enable draw-in bar (4) card to establish in draw-in groove (25), the outer wall of barrel (21) is equipped with the external screw thread, the inner wall of inner tube (3) is internal and internal thread, when draw-in bar (4) card is established at the draw-in groove (25) and hangs inside tube (2) and is connected with screw thread (22) realization.

2. The casing head according to claim 1, wherein: the inner wall of the hanger (2) is also provided with internal threads.

3. The casing head according to claim 2, wherein: the casing head is characterized in that the casing head body (1) is connected with a gate valve (5) through a pipeline, and one end of the gate valve (5) is connected with a pressure gauge (6) through a pipeline.

4. A casing head according to claim 3, wherein: the bottom of the inner tube (3) is provided with a plurality of lower screw holes (7).

5. The casing head according to any one of claims 1 to 4, wherein: the bottom of casing head body (1) is connected with supporting legs (8), the lower extreme of supporting legs (8) is connected with solid fixed ring (9).