A type of oil wellhead casing head

Abstract

This invention discloses an oil wellhead casing head, comprising: a casing head body, the casing head body including a pipe head and a straightening mechanism, the pipe head being disposed in the straightening mechanism, the straightening mechanism including a straightening platform and a straightening frame, the straightening frame being disposed on the straightening platform, the pipe head passing through the straightening platform and the straightening frame, and the straightening frame being used to clamp and straighten the pipe head. This invention provides an oil wellhead casing head, which includes a casing head body, the casing head body including a pipe head and a straightening mechanism, the straightening mechanism straightening and fixing the pipe head, and the straightening mechanism being easy to install. The straightening mechanism includes a straightening platform and a straightening frame, the pipe head is passed from top to bottom through the straightening platform and connected to the corresponding pipe, and then the straightening frame is installed on the straightening platform and the straightening frame, the straightening frame being used to clamp and straighten the pipe head, thereby preventing the casing head body from tilting during use.

Description

Technical Field

[0001] This invention relates to the field of casing head technology, and more specifically, to an oil wellhead casing head. Background Technology

[0002] The casing head is used to fix the wellhead of the drilled well, connect the wellhead casing string, support the weight of the technical casing and the oil layer casing, seal the annular space between each layer of casing, provide a transition connection for the installation of blowout preventers, tubing heads, and Christmas trees, and through the two side ports on the casing head body, construction operations such as mud filling, monitoring, and adding balance fluid can be carried out.

[0003] Chinese patent application CN20414617325.1 discloses an oil wellhead casing head with multiple support points, including a support base, a casing head body, and a groove. A hydraulic rod is installed inside the support base, and an mounting seat is installed at the end of the hydraulic rod. An upper connector is installed at the upper end of the casing head body, and a lower connector is installed at the lower end. Sealing rings are installed inside both the upper and lower connectors. A long bolt is installed inside the groove, and a support rod is installed on the surface of the long bolt. A positioning hole is formed on the surface of the retraction rod, and an anti-slip base is installed at the bottom end of the retraction rod. This oil wellhead casing head with multiple support points incorporates an elastic plate for cushioning, and the mounting seat and support rod provide multi-point support for the casing head, increasing its stability. The liftable mounting seat and support rod allow for convenient and quick adjustment of the casing head height according to installation requirements.

[0004] However, the above-mentioned technologies are relatively bulky and complex to install. Therefore, it is necessary to propose an oil wellhead casing head to at least partially solve the problems existing in the current technology. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, the present invention provides an oil wellhead casing head, comprising: a casing head body, the casing head body including a pipe head and a straightening mechanism, the pipe head being disposed in the straightening mechanism, the straightening mechanism including a straightening platform and a straightening frame, the straightening frame being disposed on the straightening platform, the pipe head passing through the straightening platform and the straightening frame, and the straightening frame being used to clamp and straighten the pipe head.

[0007] According to an embodiment of the present invention, the wellhead casing head of the oil production well has a straightening boss on the straightening platform, and the straightening frame is disposed on the straightening boss.

[0008] According to an embodiment of the present invention, the wellhead casing head of an oil well includes a straightening frame comprising two first vertical rods, two second vertical rods, and two straightening rings. The two first vertical rods are disposed on a straightening protrusion, the second vertical rods are disposed inside the first vertical rods, and the two straightening rings are sequentially disposed on the casing head and respectively connected to the second vertical rods on both sides.

[0009] According to an embodiment of the present invention, the wellhead casing head of an oil well includes two C-shaped semicircles and multiple spring members. The two C-shaped semicircles are connected to each other, and the multiple spring members are evenly distributed between the C-shaped semicircles and the outer wall of the casing head.

[0010] According to an embodiment of the present invention, the spring component of the wellhead casing head includes a spring body, a T-shaped spring cylinder, and a T-shaped spring rod. The T-shaped spring cylinder and the T-shaped spring rod are inserted into each other and respectively connected to the C-shaped half-circle body and the casing head. The spring body is disposed between the T-shaped spring cylinder and the T-shaped spring rod.

[0011] According to an embodiment of the present invention, the upper end of the casing head of the oil wellhead is connected to the outer pipe through a flange module. The flange module includes a first flange assembly and a second flange assembly. The first flange assembly is disposed at the bottom of the outer pipe, and the second flange assembly is disposed at the upper end of the casing head. The first flange assembly and the second flange assembly are connected to each other.

[0012] According to an embodiment of the present invention, the first flange assembly includes a flange cover and a plurality of locking elements. The flange cover is disposed at the bottom of the outer pipe and has a plurality of strip holes. The locking elements are disposed in the strip holes. The second flange assembly includes a flange seat, which is disposed at the upper end of the pipe head. The flange seat has a locking cavity corresponding to the locking elements. The flange seat has an inner leak-proof sleeve, which has an inner leak-proof groove. The end of the filter pipe has an inner leak-proof pressure body corresponding to the inner leak-proof groove.

[0013] According to an embodiment of the present invention, the wellhead casing head of the oil production well is provided with an intermediate drive groove on the flange cover, a drive wheel is provided in the intermediate drive groove, and a fan-shaped hole corresponding to the strip hole is provided in the drive wheel. The fan-shaped hole has two wedge-shaped support walls and a C-shaped top wall.

[0014] According to an embodiment of the present invention, the locking element of the wellhead casing head includes a T-shaped locking rod and a locking cap. The T-shaped locking rod passes through a strip-shaped hole, and the locking cap is disposed on the T-shaped locking rod and located on the side of the flange cover away from the flange seat. The T-shaped block of the T-shaped locking rod extends into the locking cavity. A linkage block is also disposed on the T-shaped locking rod, and an inner spring is disposed between two adjacent linkage blocks.

[0015] According to an embodiment of the present invention, the locking cavity has a T-shaped opening and an internal receiving groove. An inclined slide is formed between the T-shaped opening and the receiving groove. The inclined slide has an outer opening corresponding to the T-shaped opening and an inner opening corresponding to the receiving groove. Two limiting blocks are also disposed inside the locking cavity.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] This invention provides an oil wellhead casing head, which includes a casing head body, a pipe head, and a straightening mechanism. The pipe head is installed in the straightening mechanism, which straightens and fixes the pipe head. The straightening mechanism is easy to install. The straightening mechanism includes a straightening platform and a straightening frame. The straightening platform is fixed to a hard surface by multiple first fasteners. The pipe head is passed through the straightening platform from top to bottom and connected to the corresponding pipe. The straightening frame is then installed on the straightening platform and in the straightening frame. The straightening frame is used to clamp and straighten the pipe head, thereby preventing the casing head body from tilting during use.

[0018] The oil wellhead casing head of the present invention, other advantages, objectives and features of the present invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of the present invention. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a left view of a portion of the structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of the flange module in this invention. Figure 1 .

[0023] Figure 4 This is a schematic diagram of the internal structure of the flange module in this invention. Figure 2 .

[0024] Figure 5 This is a top view of the flange cover in this invention.

[0025] Figure 6 This is a schematic diagram of the internal structure of the drive wheel in this invention.

[0026] Figure 7 This is a schematic diagram of the flange seat in this invention. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0028] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0029] like Figures 1-2 As shown, the present invention provides an oil wellhead casing head, comprising: a casing head body 100, the casing head body 100 including a pipe head 1 and a straightening mechanism 2. Here, the pipe head 1 is installed in the straightening mechanism 2, and the straightening mechanism 2 straightens and fixes the pipe head 1. The straightening mechanism 2 is easy to install. The straightening mechanism 2 includes a straightening platform 3 and a straightening frame 4. The straightening platform 3 is fixed to a hard ground (not shown) by a plurality of first fasteners 30. The pipe head 1 is passed from top to bottom through the straightening platform 3 and connected to the corresponding pipe (not shown). Then the straightening frame 4 is installed on the straightening platform 3 and in the straightening frame 4. The straightening frame 4 is used to clamp and straighten the pipe head 1, thereby preventing the casing head body 100 from tilting during use.

[0030] Furthermore, in some embodiments of the present invention, the straightening platform 3 has a straightening boss 31, and the straightening frame 4 can be installed on the straightening boss 31 by means of a second fastener 40, thereby realizing the installation and fixation of the straightening frame 4 on the straightening platform 3.

[0031] Furthermore, some embodiments of the present invention provide a specific structure for the aforementioned straightening frame 4. This straightening frame 4 includes two first vertical rods 41, two second vertical rods 42, and two straightening rings 43. The two first vertical rods 41 are mounted on the straightening boss 31 via the aforementioned second fasteners 40. The second vertical rods 42 are mounted on the inner side of the first vertical rods 41 via crossbars 46. The two straightening rings 43 are sequentially mounted on the pipe head 1 and connected to the second vertical rods 42 on both sides. The straightening frame 4 with this structure can effectively straighten and fix the pipe head 1, preventing tilting during installation.

[0032] Furthermore, some embodiments of the present invention provide a specific structure for the aforementioned straightening ring 43. Here, the straightening ring 43 of this structure includes two C-shaped semicircles 44 and multiple spring members 45. The two C-shaped semicircles 44 can be connected to each other by a third fastener 47, while the multiple spring members 45 are evenly installed between the C-shaped semicircles 44 and the outer wall of the tube head 1. The multiple spring members 45 form internal support in the C-shaped semicircles 44 and the tube head 1 to prevent the tube head 1 from tilting.

[0033] Furthermore, some embodiments of the present invention provide a specific structure for the aforementioned spring member 45, wherein the spring member 45 includes a spring body 451, a T-shaped spring sleeve 452, and a T-shaped spring rod 453. The T-shaped spring sleeve 452 and the T-shaped spring rod 453 are interlocked and respectively connected to the C-shaped semi-circular body 44 and the tube head 1. The spring body 451 is installed between the T-shaped spring sleeve 452 and the T-shaped spring rod 453, thereby abutting against the T-shaped spring sleeve 452 and the T-shaped spring rod 453 to achieve the straightening effect of the straightening ring 43.

[0034] Exemplary flange module

[0035] like Figures 3-7 As shown, in some embodiments of the present invention, a flange module 6 is installed at the upper end of the pipe head 1, and the flange module 6 is connected to the outer pipe 101. The flange module 6 has the advantages of simple operation and convenient installation, and it is also convenient to open when maintaining the pipe head 1 and the outer pipe 101. Opening it also avoids losing the parts required for fixing.

[0036] The flange module 6 of this structure includes a first flange assembly 7 and a second flange assembly 8. The first flange assembly 7 is installed at the bottom of the outer pipe 101, while the second flange assembly 8 is installed at the upper end of the pipe head 1. The first flange assembly 7 and the second flange assembly 8 are connected to each other.

[0037] Specifically, the flange module 6 of this structure includes a first flange assembly 7 and a second flange assembly 8. The first flange assembly 7 is installed at the bottom of the outer pipe 101, while the second flange assembly 8 is installed at the upper end of the pipe head 1, and the first flange assembly 7 and the second flange assembly 8 are interconnected. The first flange assembly 7 and the second flange assembly 8 achieve the aforementioned effect of simple operation and convenient installation, and also facilitate the opening of the pipe head 1 and the outer pipe 101 for maintenance, while avoiding the loss of the necessary fixing parts.

[0038] Furthermore, some embodiments of the present invention provide a specific structure for the first flange assembly 7 described above. This first flange assembly 7 includes a flange cover 71 and multiple locking elements 72. The flange cover 71 is installed at the bottom of the outer tube 101, and the flange cover 71 has multiple slotted holes 711, with four slotted holes 711 arranged in a cross shape. The locking elements 72 are installed in the slotted holes 711. Correspondingly, the second flange assembly 8 of the above structure includes a flange seat 81, which is installed at the upper end of the tube head 1. The flange seat 81 has a locking cavity 83 corresponding to the locking elements 72. Therefore, when installing the outer tube 101 onto the tube head 1, the flange cover 71 is aligned with the flange seat 81, allowing the multiple locking elements 72 to enter the locking cavity 83, and then the locking elements 72 are locked. This achieves the aforementioned effect of simple operation and convenient installation, and also facilitates opening during maintenance of the tube head 1 and the outer tube 101, preventing the loss of necessary fixing components.

[0039] Furthermore, an inner leak-proof groove 821 is provided on the inner leak-proof sleeve 82. Correspondingly, an inner leak-proof pressure body 102 corresponding to the inner leak-proof groove 821 is provided at the end of the pipe head 1. Here, a leak-proof pad (not shown) can be installed in the inner leak-proof groove 821. The inner leak-proof pressure body 102 enters the inner leak-proof groove 821 and squeezes the leak-proof pad to prevent leakage.

[0040] Furthermore, in some embodiments of the present invention, an intermediate drive groove 712 is provided on the flange cover 71, a drive wheel 713 is installed in the intermediate drive groove 712, and a fan-shaped hole 714 corresponding to the strip hole 711 is provided in the drive wheel 713. Here, the fan-shaped hole 714 of this structure has two wedge-shaped support walls 715 and a C-shaped top wall 716. Generally speaking, the locking member 72 is connected to the locking cavity 83, and is located at the lower part of the fan-shaped hole 714 and close to the bottom of the two wedge-shaped support walls 715. Therefore, when it is necessary to... To open flange module 6 for maintenance of pipe head 1 and outer pipe 101, the operator can first loosen locking element 72, and then actuate drive wheel 713 to rotate it. This causes either wedge-shaped support wall 715 to contact locking element 72, which then moves along the wedge-shaped support wall 715 towards C-shaped top wall 716, and simultaneously moves outward in the slot 711. Pulling the outer pipe 101 then removes locking element 72 from locking cavity 83. This operation is simple and convenient for installation, and also facilitates opening for maintenance of pipe head 1 and outer pipe 101. Locking element 72 remains mounted on flange cover 71, preventing loss.

[0041] Exemplary locking component

[0042] Furthermore, some embodiments of the present invention provide a specific structure of the locking member 72 described above. Here, the locking member 72 of this structure includes a T-shaped locking rod 721 and a locking cap 722. The T-shaped locking rod 721 passes through the strip hole 711, and the locking cap 722 is installed on one end of the T-shaped locking rod 721 and is located on the side of the flange cover 71 away from the flange seat 81. The other end of the T-shaped locking rod 721 has a T-shaped block 723. So when the flange cover 71 and the flange seat 81 are installed, the T-shaped block 723 of the T-shaped locking rod 721 extends into the locking cavity 83 and fixes the T-shaped locking rod 721 through the locking cavity 83. The locking cap 722 locks and fixes the T-shaped locking rod 721 on the flange cover 71, thus realizing the mutual fixation of the flange cover 71 and the flange seat 81.

[0043] Furthermore, a linkage block 724 is installed on the T-shaped locking rod 721, and an inner spring 725 is installed between two adjacent linkage blocks 724. Here, a spring seat 726 for fixing the inner spring 725 is provided on the linkage block 724. Through the linkage block 724 and the inner spring 725, multiple locking parts 72 can be linked together. When the drive wheel 713 rotates, it can drive multiple T-shaped locking rods 721 to open, thereby synchronously entering the locking cavity 83 of the flange seat 81. Then, under the action of multiple inner springs 725, they move to a closed state where they are close to each other. Finally, the operator locks the locking cap 722. This completes the installation process of the flange cover 71 on the flange seat 81. This process is simple to operate and convenient to install. It is also convenient to open when maintaining the pipe head 1 and the outer pipe 101, and opening also avoids the loss of the parts required for fixing.

[0044] Exemplary locking cavity

[0045] Furthermore, some embodiments of the present invention provide a specific structure of the locking cavity 83 described above. Here, the locking cavity 83 of this structure has a T-shaped opening 831 and an internal receiving groove 832. Between the T-shaped opening 831 and the receiving groove 832 is an inclined slide 833. The inclined slide 833 has an outer channel 834 corresponding to the T-shaped opening 831 and an inner channel 835 corresponding to the receiving groove 832. The locking cavity 83 is also equipped with two limiting blocks 836 corresponding to the T-shaped locking rod 721. Therefore, when the T-shaped block 723 of the T-shaped locking rod 721 corresponds to the T-shaped opening 831, it enters the inclined slide 833 through the outer channel 834. Then, as the drive wheel 713 rotates, it can drive multiple T-shaped locking rods 721 to open. In this way, the T-shaped locking rod 721 enters the inner channel 835 along the inclined slide 833. Then, under the action of multiple inner springs 725, the T-shaped block 723 enters the receiving groove 832. The T-shaped locking rod 721 is located in the two limiting blocks 836. The two limiting blocks 836 limit the T-shaped block 723 to prevent it from sliding out of the locking cavity 83. The locking cavity 83 of the above structure is used to fix the locking part 72. The above process has the effects of simple operation and convenient installation. Moreover, it is also convenient to open when maintaining the tube head 1 and the outer tube 101. Opening also avoids losing the parts required for fixing.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An oil production wellhead spool, characterized by, The wellhead casing head body comprises a casing head part, a centralizing mechanism, the casing head part is arranged in the centralizing mechanism, the centralizing mechanism comprises a centralizing platform and a centralizing frame, the centralizing frame is arranged on the centralizing platform, the casing head part is arranged in the centralizing platform and the centralizing frame, and the centralizing frame is used for clamping the casing head part. The upper end of the casing head part is connected with the outer pipe through a flange module, the flange module comprises a first flange assembly and a second flange assembly, the first flange assembly is arranged at the bottom of the outer pipe, the second flange assembly is arranged at the upper end of the casing head part, and the first flange assembly and the second flange assembly are connected with each other. The first flange assembly comprises a flange cover and a plurality of locking pieces, the flange cover is arranged at the bottom of the outer pipe, a plurality of strip-shaped holes are arranged on the flange cover, and the locking pieces are arranged in the strip-shaped holes; the second flange assembly comprises a flange seat, the flange seat is arranged at the upper end of the casing head part, the flange seat has locking cavities corresponding to the locking pieces, and the flange seat has an inner leakage prevention sleeve, the inner leakage prevention sleeve has an inner leakage prevention groove, and the end of the outer pipe has an inner leakage prevention pressing body corresponding to the inner leakage prevention groove. The flange cover is provided with an intermediate driving groove, a driving wheel is arranged in the intermediate driving groove, the driving wheel is provided with sector-shaped holes corresponding to the strip-shaped holes, and the sector-shaped holes have two wedge-shaped walls and a C-shaped top wall. The locking piece comprises a T-shaped locking rod and a locking cap, the T-shaped locking rod is arranged in the strip-shaped hole, the locking cap is arranged on the T-shaped locking rod and located on the side of the flange cover away from the flange seat, the T-shaped block of the T-shaped locking rod extends into the locking cavity, and the T-shaped locking rod is further provided with a linkage block, and an inner spring is arranged between two adjacent linkage blocks. The locking cavity has a T-shaped opening, an accommodating groove is arranged in the locking cavity, a slanted slide is arranged between the T-shaped opening and the accommodating groove, the slanted slide has an outer channel corresponding to the T-shaped opening and an inner channel corresponding to the accommodating groove, and two limiting blocks are arranged in the locking cavity. The centralizing platform has a centralizing convex platform, and the centralizing frame is arranged on the centralizing convex platform.

2. An oil wellhead spool as defined in claim 1, wherein The centralizing frame comprises two first vertical rods, two second vertical rods and two centralizing rings, the two first vertical rods are arranged on the centralizing convex platform, the second vertical rods are arranged on the inner sides of the first vertical rods, and the two centralizing rings are sequentially arranged on the casing head part and connected with the two second vertical rods.

3. An oil wellhead spool as defined in claim 2, wherein, The centralizing ring comprises two C-shaped half rings and a plurality of spring pieces, the two C-shaped half rings are connected with each other, and the plurality of spring pieces are arranged between the C-shaped half rings and the outer wall of the casing head part.

4. An oil wellhead spool as defined in claim 3, wherein, The spring piece comprises a spring body, a T-shaped spring cylinder and a T-shaped spring rod, the T-shaped spring cylinder and the T-shaped spring rod are inserted into each other and connected with the C-shaped half ring and the casing head part, and the spring body is arranged between the T-shaped spring cylinder and the T-shaped spring rod.

5. An oil wellhead spool as defined in claim 4, wherein, ​

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