Casing head easy to install and adjust and used for petroleum drilling machine

Abstract

The utility model relates to the technical field of oil exploitation, in particular to a casing head easy to install and adjust for an oil drilling machine, which comprises a casing head body and a support chassis component arranged below the casing head body, a plurality of adjusting support components are connected to the top of the support chassis component at intervals, and the adjusting support components are connected with the casing head body. The supporting chassis assembly comprises an upper flange head and a lower flange head, the upper flange head and the lower flange head are rotationally connected, a plurality of mounting holes are formed in the upper flange head at intervals, fastening bolts are mounted in the mounting holes respectively, and the fastening bolts are located on the inner side of the lower flange head respectively. The driving hand wheel and the adjusting screw rod are rotated to drive the guide sliding block to move up and down on the L-shaped supporting rod until the guide sliding block reaches a required position, and the limiting nut is rotated to tightly abut against the top of the guide sliding block, so that the installation height of the casing head body is locked, and the stability of the casing head body after installation is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of oil mining, in particular to a casing head for an oil drilling machine which is easy to install and adjust. Background Art

[0002] The casing head is used to secure the wellhead and connect the wellhead casing string. It supports the weight of the technical casing and reservoir casing, seals the annular space between the layers of casing, and provides a transition connection for the installation of blowout preventers, tubing heads, and Christmas trees. Through two side ports on the main body, it can also be used for operations such as mud squeezing, monitoring, and adding balancing fluid. Below the casing head is usually the surface casing or other types of casing string. During oil drilling operations, the casing head is installed at the upper end of the surface casing string to suspend all other layers of casing except the surface casing and seal the annular space between the layers of casing. During drilling operations, the height of the wellhead can change due to changes in geological conditions or adjustments to the drilling process. This change directly affects the installation seal and alignment accuracy between the connecting pipe below and the casing head. Therefore, timely adjustment of the casing head installation height is crucial to improving the installation seal between the connecting pipe and the casing head.

[0003] With respect to the above-mentioned related technologies, the inventors found that when the wellhead height changes, in order to adjust the installation height of the casing head, it is often necessary to fine-tune the height of the lower connecting pipe first, and then install the casing head. During this process, the casing head needs to be repeatedly disassembled and assembled, which reduces work efficiency. In addition, in order to ensure that the casing head can be accurately installed on the wellhead and aligned with the connecting pipe below, the supporting chassis at the bottom of the casing head must be precisely aligned with the mounting hole of the connecting pipe during the installation process. However, since the casing head is heavy, even with the assistance of heavy equipment such as external cranes, the operator still faces great challenges when trying to rotate the casing head to complete the precise alignment of the supporting chassis and the mounting hole. This not only increases the difficulty of the operation, but also further affects the overall installation efficiency of the oil production pipeline. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a casing head for an oil drilling rig that is easy to install and adjust, which is convenient for directly adjusting the height of the casing head and does not require repeated disassembly and assembly of the casing head for installation, thereby improving work efficiency. In addition, during the installation of the casing head, it is convenient to align the supporting chassis with the installation hole of the connecting pipe, reducing the operating difficulty of the staff and further improving the overall installation efficiency of the oil production pipeline.

[0005] To solve the above technical problems, the present invention adopts a technical solution: providing a casing head for an oil drilling rig that is easy to install and adjust, comprising: a casing head body and a supporting chassis assembly disposed thereunder, a plurality of adjustment support assemblies spaced apart and connected to the top of the supporting chassis assembly, the adjustment support assemblies being connected to the casing head body;

[0006] The supporting chassis assembly includes an upper flange head and a lower flange head, the upper flange head and the lower flange head are rotatably connected, the upper flange head is provided with a plurality of mounting holes at intervals, and fastening bolts are respectively installed in the mounting holes, and the fastening bolts are respectively located on the inner side of the lower flange head;

[0007] The adjustment support assembly includes an L-shaped support rod installed on the top of the support chassis assembly, a sliding opening is opened on one side of the L-shaped support rod, a guide sliding block connected to the sleeve head body is installed in the sliding opening, and also includes a limit adjustment part that drives the guide sliding block to move up and down.

[0008] By adopting the above technical solution, the upper flange head and the lower flange head are connected by rotation to achieve relative position adjustment, which makes it easy for the upper flange head to align with the hole position of the lower connecting pipe, reducing the difficulty of installation. The L-shaped support rod provides support and connection, connecting the sleeve head body to the support chassis assembly, and the sliding opening allows the guide sliding block to slide up and down on the L-shaped support rod, thereby realizing the adjustment of the installation height of the sleeve head body, and after determining the corresponding height, it is locked in the required position through the limit adjustment member to ensure that the installation height of the sleeve head body is accurate, which not only realizes the precise adjustment of the installation height of the sleeve head body, but also reduces the difficulty of operation and reduces the number of repeated disassembly and assembly of the sleeve head body.

[0009] In a preferred example, the present invention can be further configured as follows: the limit adjustment member includes an adjusting screw threaded through the top of the L-shaped support rod, the top of the adjusting screw is connected to a driving handwheel, the upper thread of the adjusting screw is connected to at least one limit nut, and the limit nut is located between the L-shaped support rod and the guide sliding block and is in contact with the top of the guide sliding block.

[0010] By adopting the above technical solution, the driving handwheel enables the operator to easily and accurately adjust the rotation of the adjusting screw, realize the up and down movement of the guide sliding block on the L-shaped support rod, thereby adjusting the installation height of the casing head body, and locking the installation height of the casing head body under the action of the limit nut to prevent it from moving or loosening during use.

[0011] In a preferred example, the present invention can be further configured as follows: a plane bearing is provided between the upper flange head and the lower flange head, annular mounting grooves are respectively provided on the opposite sides of the upper flange head and the lower flange head, and both ends of the plane bearing are respectively installed in the corresponding annular mounting grooves.

[0012] By adopting the above technical solution, in addition to being connected to the adjusting support assembly and installing the fastening bolts, the upper flange head also cooperates with one end of the plane bearing through the annular mounting groove to achieve a flexible rotational connection with the lower flange head. In addition to being connected to the wellhead or other connecting pipe, the lower flange head also cooperates with the other end of the plane bearing through the annular mounting groove to ensure the stability and smoothness of the rotation. The plane bearing serves as a rotating connection component between the upper flange head and the lower flange head, which not only provides the necessary rotation support, but also reduces the overall weight through its hollow structure and improves the rotation efficiency.

[0013] In a preferred example, the present invention can be further configured as follows: a rotating sleeve with a U-shaped cross-section is provided on the inner side of the upper flange head, the inner circle of the rotating sleeve coincides with the inner circle of the bottom end of the casing head body, and the inner side of the outer circle of the rotating sleeve is rotatably connected to the inner circle surface of the upper flange head.

[0014] By adopting the above technical solution, the rotating sleeve reduces the direct contact between the upper flange head and the lower connecting pipe, and protects the surface of the connecting pipe when the sleeve head body and the lower connecting pipe are aligned with the lower hole after installation, thereby reducing the wear and friction on the surface of the connecting pipe, extending its service life, and enabling the sleeve head body to rotate flexibly and smoothly, thereby facilitating alignment with the hole position of the lower connecting pipe and reducing the difficulty of installation.

[0015] In a preferred example, the present invention can be further configured as follows: the bottom end of the rotating sleeve is provided with an inclined guide end surface, and the bottom end of the guide end surface is arranged away from the center of the rotating sleeve.

[0016] By adopting the above technical solution, the guide end face makes it easier to align the connecting pipe when the casing head body is installed with the connecting pipe below. Since the guide end face is inclined and the bottom end is away from the center of the rotating sleeve, when the casing head body descends, the guide end face will first contact the surface of the connecting pipe and guide the casing head body to move in the correct direction, reducing the friction and wear between the casing head body and the connecting pipe, making the installation process of the casing head body smoother and more efficient, reducing the time for repeated installation and adjustment due to improper alignment, and improving work efficiency.

[0017] In summary, the present invention includes at least one of the following beneficial technical effects of a casing head for an oil drilling rig that is easy to install and adjust:

[0018] 1. By rotating the driving handwheel, the adjusting screw drives the guide sliding block to move up and down on the L-shaped support rod until it reaches the desired position. Then, by rotating the limit nut, it is tightly against the top of the guide sliding block, thereby locking the installation height of the casing head body and ensuring the stability of the casing head body after installation.

[0019] 2. The upper flange head and the lower flange head are connected in rotation through a plane bearing, which not only reduces the overall weight but also improves the efficiency of rotation. The relative position of the two is adjusted through the rotation connection, which makes it easier for the upper flange head to align with the hole position of the connecting pipe below, reducing the difficulty of installation.

[0020] 3. The rotating sleeve and the inclined guide end surface allow the casing head body to be easily and accurately guided to the lower connecting pipe and the bottom inner cavity of the casing head body for calibration installation during the installation process. This can also reduce friction and wear caused by direct impact, and ensure the coaxiality between the casing head body and the connecting pipe, thereby improving the installation accuracy. At the same time, the rotating connection design between the rotating sleeve and the upper flange head allows the casing head body to rotate flexibly and smoothly, which is convenient for the operator to make fine adjustments and further improves the accuracy of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the adjustable support assembly of the utility model;

[0024] Figure 3 This is a schematic structural diagram of the supporting chassis assembly of the utility model;

[0025] Figure 4 This is a schematic structural diagram of the rotary sheath of the utility model.

[0026] In the figure: 1, casing head body; 20, support chassis assembly; 30, adjustment support assembly;

[0027] 21. Upper flange head; 22. Lower flange head; 23. Mounting hole; 24. Fastening bolt; 25. Plane bearing; 26. Annular mounting groove; 27. Rotating sleeve; 28. Guide end face;

[0028] 31. L-shaped support rod; 32. Sliding opening; 33. Guide sliding block; 34. Limit adjustment member;

[0029] 341. Adjusting screw; 342. Driving handwheel; 343. Limit nut. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0031] It should be noted that these drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0032] Reference Figure 1-4 , a casing head for a petroleum drilling rig that is easy to install and adjust disclosed by the utility model comprises: a casing head body 1 and a supporting chassis assembly 20 arranged below the casing head body 1, a plurality of adjusting support assemblies 30 are connected to the top of the supporting chassis assembly 20 at intervals, the adjusting support assembly 30 is connected to the casing head body 1, the supporting chassis assembly 20 comprises an upper flange head 21 and a lower flange head 22, the upper flange head 21 and the lower flange head 22 are rotatably connected, a plurality of mounting holes 23 are spaced apart on the upper flange head 21, fastening bolts 24 are respectively installed in the mounting holes 23, and the fastening bolts 24 are respectively located on the inner side of the lower flange head 22, the adjusting support assembly 30 comprises an L-shaped support rod 31 mounted on the top of the supporting chassis assembly 20, a sliding opening 32 is opened on one side of the L-shaped support rod 31, a guide sliding block 33 connected to the casing head body 1 is installed in the sliding opening 32, and a driving guide sliding block 33 is further included. The upper flange head 21 and the lower flange head 22 are connected by a rotation to adjust the relative position, so that the upper flange head 21 can be rotated to align with the hole position of the lower connecting pipe, and after alignment, the upper flange head 21 and the flange connection end of the connecting pipe are tightly connected together by the fastening bolts 24 in the mounting holes 23, ensuring the stability of the support chassis assembly 20 and reducing the installation difficulty. The L-shaped support rod 31 provides support and connection, connecting the casing head body 1 with the support chassis assembly 20, and the sliding opening 32 allows the guide sliding block 33 to slide up and down on the L-shaped support rod 31, ensuring that the casing head body 1 can be accurately adjusted according to different height requirements, improving the accuracy and stability of the drilling operation, and after determining the corresponding height, it is locked in the required position by the limit adjustment member 34 to ensure that the installation height of the casing head body 1 is accurate.

[0033] The limiting adjusting part 34 comprises an adjusting screw rod 341 threaded on the top of the L-shaped support rod 31, the top of the adjusting screw rod 341 is connected with a driving hand wheel 342, the adjusting screw rod 341 is threadedly connected with not less than one limiting nut 343, the limiting nut 343 is located between the L-shaped support rod 31 and the guide sliding block 33 and is in abutting connection with the top of the guide sliding block 33; the cooperation of the adjusting screw rod 341 and the top of the L-shaped support rod 31 realizes the accurate movement of the guide sliding block 33 in the vertical direction, ensures that the height of the casing head body 1 accurately meets the requirements of the drilling operation, the operator manually rotates the driving hand wheel 342 to drive the adjusting screw rod 341 to rotate in the L-shaped support rod 31, thereby realizing the up and down movement of the guide sliding block 33, and without the need for complex tools or equipment, and when the guide sliding block 33 moves to the required position, the limiting nut 343 is rotated to abut against the top of the guide sliding block 33, thereby locking the position of the guide sliding block 33, preventing the guide sliding block 33 from moving due to vibration or external force during drilling, and ensuring the height stability of the casing head body 1, providing more reliable support for oil drilling operation.

[0034] A flat bearing 25 is arranged between the upper flange head 21 and the lower flange head 22, and annular mounting grooves 26 are respectively formed on the sides of the upper flange head 21 and the lower flange head 22, and the two ends of the flat bearing 25 are respectively mounted in the corresponding annular mounting grooves 26; the annular mounting grooves 26 are used for mounting and fixing the flat bearing 25, ensuring the stability and smoothness of rotation, and the cooperation of the annular mounting grooves 26 and the flat bearing 25 ensures the stability and reliability of rotation, preventing safety hazards caused by poor rotation, and when assembling the casing head body 1 and the flange connecting hole position on the lower connecting pipe, the casing head body 1 and the upper flange head 21 are rotated to make the mounting hole 23 align with the hole position of the lower connecting pipe, so as to be installed and fixed by the fastening bolt 24.

[0035] The inner side of the upper flange head 21 is provided with a rotating sleeve 27 with a U-shaped cross section, the inner circle of the rotating sleeve 27 coincides with the inner circle of the bottom end of the casing head body 1, the outer circle of the rotating sleeve 27 is in rotating connection with the inner circle of the upper flange head 21, and the bottom end of the rotating sleeve 27 is provided with an inclined guide end face 28, and the bottom end of the guide end face 28 is away from the center of the rotating sleeve 27; the rotating sleeve 27 is made of wear-resistant and corrosion-resistant material, and the guide end face 28 can easily and accurately guide the calibration installation of the bottom end inner cavity of the casing head body 1 and the lower connecting pipe during the assembly of the casing head body 1 and the lower connecting pipe, reducing the friction and wear caused by direct impact, and ensuring the coaxiality between the casing head body 1 and the connecting pipe, and the rotating sleeve 27 can also rotate when the hole position of the upper flange head 21 and the lower connecting pipe is calibrated, so as to be adjusted by the operator, further improving the accuracy of installation.

[0036] The implementation principle of this embodiment is as follows: during the assembly process with the lower connecting pipe, the casing head body 1 is lifted with the external lifting equipment so that the end of the lower connecting pipe is aligned with the bottom inner cavity of the casing head body 1. During this process, the guide end surface 28 guides the lower connecting pipe to align with the bottom inner cavity of the casing head body 1, so that the casing head body 1 and the connecting pipe are kept coaxial and the friction and wear between the two are reduced. After being assembled with the internal components of the casing head body 1, the casing head body 1 and the upper flange head 21 are rotated to align the mounting hole 23 with the lower end. The hole position of the connecting pipe is used to install and fix the fastening bolt 24. If the height of the casing head body 1 needs to be adjusted, the operator can rotate the driving hand wheel 342 to drive the adjusting screw 341 to rotate in the L-shaped support rod 31, so that the guide sliding block 33 moves up and down. When the guide sliding block 33 moves to the desired position, the operator uses a corresponding tool such as a wrench to rotate the limit nut 343 so that it contacts and connects with the top of the guide sliding block 33, thereby locking the position of the guide sliding block 33 to prevent the guide sliding block 33 from moving due to vibration or external force during drilling.

[0037] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A casing head for oil drilling rigs that is easy to install and adjust, characterized in that: include: A casing head body (1) and a supporting chassis assembly (20) arranged below the casing head body, wherein a plurality of adjusting support assemblies (30) are connected to the top of the supporting chassis assembly (20) at intervals, and the adjusting support assemblies (30) are connected to the casing head body (1); The supporting chassis assembly (20) comprises an upper flange head (21) and a lower flange head (22), wherein the upper flange head (21) and the lower flange head (22) are rotatably connected, and a plurality of mounting holes (23) are spaced apart on the upper flange head (21), wherein fastening bolts (24) are respectively installed in the mounting holes (23), and the fastening bolts (24) are respectively located on the inner side of the lower flange head (22); The adjusting support assembly (30) includes an L-shaped support rod (31) mounted on the top of the supporting chassis assembly (20), a sliding opening (32) is provided on one side of the L-shaped support rod (31), a guide sliding block (33) connected to the casing head body (1) is installed in the sliding opening (32), and a limit adjustment member (34) is also included for driving the guide sliding block (33) to move up and down.

2. The casing head for oil drilling rigs that is easy to install and adjust according to claim 1, characterized in that: The limit adjustment member (34) comprises an adjustment screw (341) threadedly provided on the top of the L-shaped support rod (31); the top of the adjustment screw (341) is connected to a driving hand wheel (342); the upper thread of the adjustment screw (341) is connected to at least one limit nut (343); the limit nut (343) is located between the L-shaped support rod (31) and the guide sliding block (33) and is in contact with the top of the guide sliding block (33).

3. The casing head for oil drilling rigs that is easy to install and adjust according to claim 1, characterized in that: A plane bearing (25) is provided between the upper flange head (21) and the lower flange head (22), and an annular mounting groove (26) is respectively provided on the opposite sides of the upper flange head (21) and the lower flange head (22), and both ends of the plane bearing (25) are respectively installed in the corresponding annular mounting groove (26).

4. The casing head for oil drilling rigs that is easy to install and adjust according to claim 1, characterized in that: A rotating sleeve (27) having a U-shaped cross section is provided on the inner side of the upper flange head (21), the inner circle of the rotating sleeve (27) coincides with the inner circle of the bottom end of the casing head body (1), and the inner side of the outer circle of the rotating sleeve (27) is rotatably connected to the inner circle surface of the upper flange head (21).

5. The casing head for oil drilling rigs that is easy to install and adjust according to claim 4, characterized in that: The bottom end of the rotating sleeve (27) is provided with an inclined guide end surface (28), and the bottom end of the guide end surface (28) is arranged away from the center of the rotating sleeve (27).

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