CN-224200623-U - Adjustable multistage casing head during installation

Abstract

The utility model relates to the technical field of casing heads of oil wells, in particular to an adjustable multistage casing head during installation, which comprises a casing head main body, wherein the casing head main body is arranged at the end part of a casing string, the casing head main body is arranged on a well, and a base is fixed on the well; the outer wall of the casing head main body is sleeved with an adjusting ring in a threaded manner, and the adjusting ring can axially displace along the casing head main body. When the sleeve head is not in place, the adjusting ring can be rotated to enable the adjusting ring to displace, so that the lower end of the adjusting ring is abutted with the upper surface of the base, a hanging support is provided between the sleeve head main body and the base, and the hanging stability and safety of the sleeve are improved when the sleeve head is not in place. The utility model solves the technical problem that when the sleeve head and the base have a sitting and hanging error, the sleeve head and the base are difficult to sit and hang in place.

Inventors

• MI YI
• DONG SHENG
• QIU WEIBIN
• ZHAN LIANGBIN
• WU BIN
• Mao Ruben
• SHEN YONGLE
• LU CHUANG
• Jin Zhaoou

Assignees

• 成都道森钻采设备有限公司
• 苏州道森钻采设备有限公司
• 苏州道森钻采设备股份有限公司

Dates

Publication Date

20260505

Application Date

20250627

Claims (5)

1. 1. An adjustable multistage casing head during installation is characterized by comprising a casing head main body (1); The casing head main body (1) is arranged at the end part of the casing string, the casing head main body (1) is arranged on a well, and a base (2) is fixed on the well; an adjusting ring (3) is sleeved on the outer wall of the casing head main body (1) in a threaded manner; When the sleeve head is hung in place, the lower end of the sleeve head main body (1) is abutted with the upper surface of the base (2); when the sitting and hanging are not in place, the lower end of the adjusting ring (3) is abutted with the upper surface of the base (2).
2. 2. An adjustable multi-stage casing head for installation according to claim 1, wherein the lower end of the casing head body (1) is vertically provided with an indication pin (4); the upper surface of the base (2) is provided with a pin hole vertically matched with the display pin.
3. 3. An adjustable multistage casing head according to claim 1, characterized in that the inner ring of the adjusting ring (3) is provided with trapezoidal threads (31), and the adjusting ring (3) is socket-fitted with external threads of the casing head body (1) by means of the trapezoidal threads (31).
4. 4. An adjustable multi-stage casing head according to claim 1, wherein the outer ring of the adjusting ring (3) is provided with a plurality of adjusting holes (32).
5. 5. An adjustable multi-stage casing head according to claim 1, wherein the lower end of the adjusting ring (3) does not extend beyond the lower end of the casing head body (1) before sitting.

Description

Adjustable multistage casing head during installation Technical Field The utility model relates to the technical field of oil well casing heads, in particular to an adjustable multi-stage casing head during installation. Background Casing heads in oil and gas wells are key components in the whole wellhead assembly, and are positioned at the bottommost part of the wellhead and directly sit on surface casing or conduit. Casing heads are key components of wellhead devices, are used for supporting and sealing pipe strings in petroleum and natural gas drilling or well completion operations, provide connection interfaces for subsequent drilling, well completion or production operations, and are the basis for connecting casing strings of various layers in a well with equipment such as surface blowout preventers, christmas trees and the like. At present, in the process of actually installing the casing head, the casing head cannot be well seated on a base after being connected with the casing string through threads due to reasons such as height deviation, inaccurate alignment, stress deformation and the like, so that the problems of well head sealing failure, delayed field installation, structural damage of a multistage casing head installation tilting device and the like are caused. At present, in the installation process of an oil-gas casing head, an oil pipe is preferentially input into an oil-gas well, then a casing string is matched outside the oil pipe, the oil pipe is suspended in the oil-gas well, and then the casing string is hung on a base by utilizing the casing head, so that supporting and sealing functions are provided for the casing string. However, in the process of actually installing the casing head, the casing head cannot be well seated on the base after being connected with the casing string through threads due to reasons such as height deviation, inaccurate alignment, stress deformation and the like, so that the problems of well sealing failure, delayed field installation, incomplete installation position or inclined installation of the multistage casing head, easy damage of equipment structure and the like are caused. To solve the above problems, there is a need for a casing head that can maintain a setting effect in the presence of a setting error. Disclosure of utility model The application aims to provide an adjustable multi-stage casing head during installation, which solves the technical problem that when a casing head and a base have a sitting and hanging error, the casing head is difficult to sit and hang in place. In order to solve the technical problems, the application adopts the following scheme: an adjustable multi-stage casing head for installation includes a casing head body. Preferably, the casing head main body is arranged at the end part of the casing string, the casing head main body is arranged on a well, and a base is fixed on the well. Preferably, an adjusting ring is sleeved on the outer wall of the casing head main body in a threaded manner. Preferably, when seated in place, the lower end of the casing head body abuts the upper surface of the base. Preferably, when the seat is not hung in place, the lower end of the adjusting ring is abutted with the upper surface of the base. Preferably, an indication pin is vertically arranged at the lower end of the casing head main body. Preferably, a pin hole vertically matched with the display pin is formed in the upper surface of the base. Preferably, the inner ring of the adjusting ring is provided with trapezoidal threads, and the adjusting ring is sleeved and matched with the external threads of the casing head main body through the trapezoidal threads. Preferably, a plurality of adjusting holes are arranged on the outer ring of the adjusting ring. Preferably, the lower end of the adjusting ring does not extend beyond the lower end of the casing head body before sitting. The technical scheme of the application has at least the following advantages and beneficial effects: In order to solve the problem that the sleeve head and the base are easily affected by the hanging error when being hung, the outer wall of the sleeve head main body is sleeved with the adjusting ring in a threaded manner, the adjusting ring can be adjusted through threads when the sleeve head main body and the base are not hung in place, the position of the adjusting ring is changed, the adjusting ring is abutted to the base, and therefore the sleeve head main body is integrally borne on the base through the adjusting ring, and the hanging stability and safety are improved; In the utility model, because the sitting and hanging error is smaller, when the sitting and hanging is not in place, a worker can quickly observe and judge, so that the main body of the casing head is also provided with the indicating pin, and the upper surface of the base is also provided with the pin hole matched with the display pin. In the sitting and hanging process, a worker can obser