CN214944144U

CN214944144U - Small casing head

Info

Publication number: CN214944144U
Application number: CN202121040815.4U
Authority: CN
Inventors: 刘伟
Original assignee: Yancheng Jinlongda Machinery Manufacturing Co ltd
Current assignee: Yancheng Jinlongda Machinery Manufacturing Co ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-11-30
Anticipated expiration: 2031-05-12

Abstract

The utility model relates to a little casing head, include: the device comprises a surface casing double-male short circuit, a casing head four-way joint, a production casing double-male short circuit, a flat gate valve, a screw thread flange, a pressure gauge assembly, a casing hanger, a rectangular sealing ring, a pointed tip jackscrew, a casing single-male short circuit, a flat-head jackscrew, a side flange and a plug; the method is characterized in that: one end of the double-male short joint of the surface casing is connected with the lower end thread of the casing head four-way joint, one side of the casing head four-way joint is respectively connected with the flat gate valve, the screw thread flange and the pressure gauge component in sequence, the change of the internal pressure of the casing head is convenient to observe, one side of the casing head four-way joint is respectively connected with the screw thread flange and the plug in sequence, the casing hanger is placed inside the casing head four-way joint, the rectangular sealing ring is placed between the casing hanger and the casing head four-way joint and plays a role in sealing, one end of the double-male short joint of the production casing is connected with the lower end thread of the casing hanger, and the upper end thread of the casing hanger is connected with the single-male short joint of the casing.

Description

Small casing head

Technical Field

The utility model belongs to the petroleum machinery field, in particular to little casing head.

Background

At present, in the actual production process of an oil field, a casing head is a well cementing device, the upper part of the casing head is connected with a wellhead device, and the lower end of the casing head is connected with a casing; however, the existing casing head has the defects of poor internal sealing performance, large volume, heaviness, complex structure, complex field installation and the like, and is a problem to be solved by production and use units together.

Disclosure of Invention

The utility model discloses a solve the inside sealing performance of current casing head poor, bulky, heavy, the structure is complicated, technical problem such as loaded down with trivial details of on-the-spot installation provides a little casing head.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a small casing head comprising: the device comprises a surface casing double-male short circuit, a casing head four-way joint, a production casing double-male short circuit, a flat gate valve, a screw thread flange, a pressure gauge assembly, a casing hanger, a rectangular sealing ring, a pointed tip jackscrew, a casing single-male short circuit, a flat-head jackscrew, a side flange and a plug; the method is characterized in that: one end of a double-pin production casing pipe is connected with the lower end of the casing pipe hanger in a threaded manner, and the upper end of the casing pipe hanger is connected with a single-pin production casing pipe; under the effect of external force, the tip jackscrew is screwed up in casing head cross upper portion flange, tighten up the jackscrew, let the closed angle top of tip jackscrew tightly on the outer chamfer of the upper end of casing hanger, prevent that casing hanger from taking place upper and lower longitudinal movement when hoist and mount, the crew cut jackscrew is also screwed up in casing head cross upper portion flange, tighten up the jackscrew, let the crew cut top of crew cut jackscrew tightly in the groove that splines of casing hanger, prevent that casing hanger from when the installation, taking place left and right lateral shifting.

The utility model has the advantages that: by adopting the rectangular sealing ring, the sealing contact area between the casing hanger and the interior of the casing head is enlarged, the sealing performance is improved, and leakage accidents are avoided; the size of the four-way joint of the casing head is reduced, the overall weight of the casing head is reduced, the production cost of the product is saved, and although the material of the four-way joint of the casing head is reduced, the high-strength alloy steel is adopted, the mechanical property is enhanced, and the safety coefficient of the product is improved; the casing head has the advantages of small volume and light weight, so that the casing head is simple and convenient to construct and install on site, the working time is shortened, and the working efficiency is improved; in a word, the small casing head has novel design and reasonable structure, and plays a positive role in safe production, yield increase and stable production of the oil field.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged cross-sectional structural view of fig. 1.

In the attached drawing 1, a surface casing double-male short circuit 1, a casing head four-way 2, a production casing double-male short circuit 3, a flat gate valve 4, a screw thread flange 5, a pressure gauge component 6, a casing hanger 7, a rectangular sealing ring 8, a pointed jackscrew 9, a casing single-male short circuit 10, a flat jackscrew 11, a side flange 12 and a plug 13.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

One end of a surface casing double-male short joint 1 is connected with the lower end of a casing head cross joint 2 through threads, one side of the casing head cross joint 2 is respectively connected with a flat gate valve 4, a screw thread flange 5 and a pressure gauge assembly 6 in sequence, so that the change of the internal pressure of the casing head is convenient to observe, one side of the casing head cross joint 2 is respectively connected with a side flange 12 and a plug 13 in sequence, a casing hanger 7 is placed inside the casing head cross joint 2, a rectangular sealing ring 8 is placed between the casing hanger 7 and the casing head cross joint 2 to play a sealing role, one end of a production casing double-male short joint 3 is connected with the lower end of the casing hanger 7 through threads, the upper end of the casing hanger 7 is connected with a casing single male short joint 10, a tip jackscrew 9 is screwed in the flange at the upper part of the casing head cross joint 2 under the action of external force to tighten the jackscrew, so that the tip angle of the tip jackscrew 9 is tightly propped on the outer chamfer at the upper end of the casing hanger 7 to prevent the casing hanger 7 from being hoisted, the flat-head jackscrew 11 is also screwed in the flange at the upper part of the casing head four-way joint 2 to tighten the jackscrew, so that the flat head of the flat-head jackscrew 11 is tightly propped in the rotation stopping groove of the casing hanger 7, and the casing hanger 7 is prevented from moving left and right transversely when being installed.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A small casing head comprising: the device comprises a surface casing double-male short circuit, a casing head four-way joint, a production casing double-male short circuit, a flat gate valve, a screw thread flange, a pressure gauge assembly, a casing hanger, a rectangular sealing ring, a pointed tip jackscrew, a casing single-male short circuit, a flat-head jackscrew, a side flange and a plug; the method is characterized in that: one end of the surface layer sleeve double male short circuit is in threaded connection with the lower end of the sleeve head four-way, and one side of the sleeve head four-way is respectively connected with a flat gate valve, a screw thread flange and a pressure gauge component in sequence, so that the change of the internal pressure of the sleeve head can be observed conveniently; one side of the casing head cross joint is sequentially connected with a screw thread flange and a plug respectively, a casing hanger is placed inside the casing head cross joint, a rectangular sealing ring is placed between the casing hanger and the casing head cross joint to play a sealing role, one end of a double-male short joint of a production casing is connected with lower end threads of the casing hanger, and upper end threads of the casing hanger are connected with a single-male short joint of the casing.

2. A small casing head according to claim 1, wherein: under the effect of external force, the tip jackscrew is screwed up in casing head cross upper portion flange, tighten up the jackscrew, let the closed angle top of tip jackscrew tightly on the outer chamfer of the upper end of casing hanger, prevent that casing hanger from taking place upper and lower longitudinal movement when hoist and mount, the crew cut jackscrew is also screwed up in casing head cross upper portion flange, tighten up the jackscrew, let the crew cut top of crew cut jackscrew tightly in the groove that splines of casing hanger, prevent that casing hanger from when the installation, taking place left and right lateral shifting.