Hoop type fast-assembly wellhead device and installation method thereof

Abstract

The invention relates to a hoop type fast-assembly well head device and an installation method thereof, the hoop type fast-assembly well head device comprises a well head device body, the well head device body is provided with an installation groove, and a plurality of sealing grooves are formed in the groove wall of the installation groove; the casing hanger is mounted at the bottom of the mounting groove, a casing hanger main sealing piece is arranged on the casing hanger, and the casing hanger main sealing piece is connected with the corresponding sealing groove; the rotary sealing sleeve is installed on the upper portion of the casing hanger, a first sealing assembly is arranged on the rotary sealing sleeve, and the first sealing assembly is connected with the corresponding sealing groove; the oil pipe hanger is installed on the upper portion of the rotary sealing sleeve, a rotary expansion assembly and a second sealing assembly are arranged on the oil pipe hanger, the rotary expansion assembly is installed outside the rotary expansion assembly, and the second sealing assembly is connected with the corresponding sealing groove. Compared with the prior art, the problems of sealing failure and installation failure caused by the fact that the hanger is not installed in place can be prevented, and therefore the installation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of oil production equipment, and in particular to a clamp-type quick-install wellhead device and an installation method thereof. Background Art

[0002] During the drilling process of oil and gas wells, the quick-install wellhead device is a key equipment for oil and gas extraction. It is widely used in many fields such as conventional and unconventional oil and gas field development, offshore operations, complex geological conditions, emergency repairs, etc. It uses quick-connect components to quickly connect the casing hanger and the wellhead to form an independent bearing mechanism, and uses sealing technology to seal the gap between the casing and the wellhead to improve the installation efficiency and safety of the wellhead device. However, the existing quick-install wellhead devices generally have the problem of the hanger tilting after being lowered or the hanger sitting on the place where the rock debris is hanging, resulting in improper installation. If it is not installed properly, the hanger seal will fail, which will lead to the risk of wellhead installation failure. Summary of the invention

[0003] The present application provides a clamp-type quick-install wellhead device and an installation method thereof, so as to solve the technical problem in the prior art that the hanger is not installed properly, thereby causing the hanger seal failure and causing the wellhead installation failure.

[0004] In a first aspect, the present application provides a clamp-type quick-install wellhead device, comprising: A wellhead device body, wherein the wellhead device body is provided with a mounting groove, and a plurality of sealing grooves are provided on the groove wall of the mounting groove; A casing hanger, the casing hanger is installed at the bottom of the installation groove, the casing hanger is provided with a casing hanger main seal, and the casing hanger main seal is connected to the corresponding sealing groove on the installation groove; A rotary sealing sleeve, the rotary sealing sleeve is installed on the upper part of the casing hanger, the rotary sealing sleeve is provided with a first sealing assembly, and the first sealing assembly is connected to the corresponding sealing groove on the mounting groove; The tubing hanger is installed on the upper part of the rotary sealing sleeve, and is provided with a rotary expansion assembly and a second sealing assembly. The rotary expansion assembly is installed outside the rotary expansion assembly, and the second sealing assembly is connected to the corresponding sealing groove on the mounting groove.

[0005] Furthermore, the first sealing assembly includes: a sealing sleeve main seal, a sealing sleeve secondary seal and a rotating sealing sleeve seal, the sealing sleeve main seal is located in the middle of the rotating sealing sleeve, the sealing sleeve secondary seal is located at the bottom of the rotating sealing sleeve, and the rotating sealing sleeve seal is located between the rotating sealing sleeve and the wellhead device body.

[0006] Furthermore, the second sealing assembly includes: a tubing hanger main seal and a tubing hanger secondary seal, the tubing hanger main seal is located in the middle of the tubing hanger, and the tubing hanger secondary seal is located at the top of the tubing hanger.

[0007] Furthermore, a connecting flange is provided on the top of the wellhead device body, a clamp connector is provided outside the connecting flange, the connecting flange and the wellhead device body are connected to each other through the clamp connector, and a plurality of top screw assemblies are provided on the clamp connector to tighten the clamp connector.

[0008] Furthermore, a pipeline crossing mechanism is also provided on the connecting flange, and an output end of the pipeline crossing mechanism is inserted into the connecting flange and the oil pipe hanger in sequence.

[0009] Furthermore, a plurality of wing-type structures are provided on the outside of the wellhead device body, and the wing-type structures are symmetrically installed on both sides of the outer wall of the wellhead device body. The wing-type structure on the left side includes a manual flat valve, a threaded flange and a pressure gauge assembly, and the three are connected in sequence from the inside to the outside. The wing-type structure on the right side includes a manual flat valve and a threaded flange, and the two are connected in sequence from the inside to the outside.

[0010] Furthermore, the clamp-type quick-install wellhead device also includes a base, the wellhead device body is installed on the base, a gap is provided between the bottom of the wellhead device body and the casing hanger, a surface casing is provided in the gap, and the surface casing is detachably connected to the wellhead device body.

[0011] Furthermore, an inner casing is provided at the bottom of the casing hanger, and the inner casing is detachably connected to the casing hanger.

[0012] Furthermore, the tubing hanger is hollow and has an oil pipe inside, and the oil pipe is detachably connected to the tubing hanger.

[0013] In a second aspect, the present invention further provides a method for installing a clamp-type quick-install wellhead device, the method comprising the following steps: Installing the casing hanger thread on the casing hanger running tool, tightening the thread to press the casing hanger into the setting position at the bottom of the wellhead device body; Installing the rotary seal sleeve thread on the rotary seal sleeve delivery tool, tightening the thread to press the rotary seal sleeve into the sealing position in the middle of the wellhead device body; The rotary expansion assembly is threadedly mounted on the rotary compression running tool. When the tubing hanger is lowered into the wellhead device body, the rotary expansion assembly is tightened to press the tubing hanger into the sealing position at the top of the wellhead device body.

[0014] The above technical solution provided by this application has the following advantages compared with the prior art: In the technical solution of the present application, multiple layers of mounting grooves and sealing grooves are arranged on the body of the wellhead device, and the casing hanger (bottom), the rotary sealing sleeve (middle) and the tubing hanger (top) are integrated in sequence; each layer of the hanger / sealing sleeve is connected to the corresponding sealing groove through an independent sealing assembly to form a multi-level redundant seal. At the same time, the rotary sealing sleeve can rotate axially to adapt to the installation deviation between the wellhead device body and the casing hanger; the tubing hanger is integrated with a rotary expansion assembly to achieve radial expansion and locking through a rotary action to eliminate assembly deviations. Compared with the prior art, the hanger in the present application adopts an expansion-type sealing structure and an anti-debris design, which can prevent the hanger from tilting after installation or the presence of rock debris at the hanging position, which can cause the installation to be inadequate, resulting in sealing failure and installation failure, thereby greatly improving the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 A cross-sectional view of a clamp-type quick-install wellhead device provided in an embodiment of the present application; Figure 2 A schematic diagram of the installation structure of a casing running tool and a casing hanger in a method for installing a clamp-type quick-install wellhead device provided in an embodiment of the present application; Figure 3 A schematic diagram of the installation structure of a rotary sealing sleeve delivery tool and a rotary sealing sleeve in a method for installing a clamp-type quick-install wellhead device provided in an embodiment of the present application; Figure 4 A schematic diagram of the installation structure of a rotary compression running tool and a rotary expansion assembly in a method for installing a clamp-type quick-install wellhead device provided in an embodiment of the present application; Figure 5 A schematic flow chart of a method for installing a clamp-type quick-install wellhead device provided in an embodiment of the present application.

[0019] Description of reference numerals: 1. Wellhead device body; 11. Mounting groove; 111. Sealing groove; 112. Gap; 113. Surface casing; 114. Inner casing; 115. Oil pipe; 12. Base; 2. Casing hanger; 21. Casing hanger main seal; 3. Rotary sealing sleeve; 31. First sealing assembly; 311. Main sealing member of sealing sleeve; 312. Secondary sealing member of sealing sleeve; 313. Sealing member of rotary sealing sleeve; 4. Tubing hanger; 41. Second sealing assembly; 411. Main sealing member of tubing hanger; 412. Secondary sealing member of tubing hanger; 42. Rotary expansion assembly; 5. Connecting flange; 51. Pipeline crossing mechanism; 6. Clamp connector; 61. Top screw assembly; 7. Wing-type structure; 71. Manual flat valve; 72. Threaded flange; 73. Pressure gauge assembly; 8. Casing hanger running tool; 9. Rotary sealing sleeve running tool; 10. Rotary compression running tool. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0021] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0022] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0023] In order to solve the technical problems in existing quick-install wellhead devices that the hanger tilts after being lowered or the hanger is not properly installed due to broken rock chips at the hanging place, the present application provides a clamp-type quick-install wellhead device and an installation method thereof, which can prevent the hanger from tilting after installation or the hanger from being not properly installed due to broken rock chips at the hanging place, resulting in sealing failure and installation failure, thereby greatly improving the installation efficiency.

[0024] See also Figure 1 , a clamp-type quick-install wellhead device provided in an embodiment of the present application includes: a wellhead device body 1, the wellhead device body 1 is provided with a mounting groove 11, and a plurality of sealing grooves 111 are provided on the groove wall of the mounting groove 11; a casing hanger 2, the casing hanger 2 is installed at the bottom of the mounting groove 11, the casing hanger 2 is provided with a casing hanger main seal 21, and the casing hanger main seal 21 is connected to the corresponding sealing groove 111 on the mounting groove 11; a rotary sealing sleeve 3, the rotary sealing sleeve 3 is installed at the upper part of the casing hanger 2, the rotary sealing sleeve 3 is provided with a first sealing component 31, and the first sealing component 31 is connected to the corresponding sealing groove 111 on the mounting groove 11; a tubing hanger 4, the tubing hanger 4 is installed at the upper part of the rotary sealing sleeve 3, the tubing hanger 4 is provided with a rotary expansion component 42 and a second sealing component 41, the rotary expansion component 42 is installed on the outside of the rotary expansion component 42, and the second sealing component 41 is connected to the corresponding sealing groove 111 on the mounting groove 11.

[0025] Specifically, a stepped mounting groove 11 is provided inside the wellhead device body 1 of the present application, and a plurality of annular sealing grooves 111 are pre-set on the groove wall for fixing the components in layers; the casing hanger 2 is installed in the mounting groove 11 at the bottom of the wellhead device body 1, and the casing is fixed and primary sealed by crimping the main seal with the corresponding sealing groove 111; the rotary sealing sleeve 3 is sleeved on the top of the casing hanger 2 and can rotate around the axis, and its first sealing component 31 is dynamically fitted with the sealing groove 111 to compensate for the installation deviation; the tubing hanger 4 is located above the rotary sealing sleeve 3, and the tubing 115 is radially expanded and locked by the rotary expansion component 42, and at the same time the second sealing component 41 is connected to the sealing groove 111 to form an end seal. The present application adopts layered independent sealing, in which the main seal, the first sealing component 31, and the second sealing component 41 form a redundant barrier to improve reliability under high-pressure conditions; secondly, the rotary sealing sleeve 3 and the rotary expansion component 42 allow self-correction of angle deviation, which can reduce the dependence on installation accuracy and dynamically adjust the improper installation caused by the tilt of the hanger after lowering or the presence of broken rock chips at the hanger's seating position; damaged sealing components can be replaced separately without disassembling the overall structure, reducing maintenance costs.

[0026] Furthermore, the rotary expansion assembly 42 comprises an inner cone sleeve and an outer expansion block, the inner wall of the inner cone sleeve is provided with a spiral groove, and the outer wall of the outer expansion block has a conical surface; by rotating and pressing the rotary expansion assembly 42, the tubing hanger 4 is driven to move along the axis, and the outer expansion block is squeezed by the conical surface to expand radially, holding the outer wall of the tubing 115, and forming an interference fit with the inner wall of the wellhead device body 1. The inner cone sleeve thread adopts a serrated single-line thread, and reverses and self-locks after rotating into place to prevent loosening due to operation vibration.

[0027] like Figure 1 As shown, the first sealing assembly 31 includes: a sealing sleeve main seal 311, a sealing sleeve secondary seal 312 and a rotating sealing sleeve seal 313. The sealing sleeve main seal 311 is located in the middle of the rotating sealing sleeve 3, the sealing sleeve secondary seal 312 is located at the bottom of the rotating sealing sleeve 3, and the rotating sealing sleeve seal 313 is located between the rotating sealing sleeve 3 and the wellhead device body 1.

[0028] Specifically, the main seal 311 of the sealing sleeve is installed in the middle of the rotating sealing sleeve 3, and forms a static main seal with the sealing surface of the mounting groove 11; the secondary seal 312 of the sealing sleeve is located at the bottom of the rotating sealing sleeve 3, and is designed as a bidirectional lip seal structure, which adaptively expands under axial pressure to enhance the bottom sealing; the rotating sealing sleeve seal 313 is arranged between the outer wall of the rotating sealing sleeve 3 and the inner wall of the wellhead device body 1, and adopts a low friction coefficient material to allow the rotating sealing sleeve 3 to maintain a dynamic seal when rotating.

[0029] like Figure 1As shown, the second sealing assembly 41 includes: a tubing hanger main seal 411 and a tubing hanger secondary seal 412 . The tubing hanger main seal 411 is located in the middle of the tubing hanger 4 , and the tubing hanger secondary seal 412 is located at the top of the tubing hanger 4 .

[0030] Specifically, the main seal 411 of the tubing hanger is installed in the middle of the tubing hanger 4, adopts a multi-stage stepped sealing structure, and forms a rigid contact with the sealing groove 111 of the wellhead device body 1, serving as a core sealing barrier; the secondary seal 412 of the tubing hanger is arranged at the top of the tubing hanger 4, and automatically presses the sealing surface under the action of the medium pressure to achieve auxiliary sealing.

[0031] Furthermore, the top and bottom of the tubing hanger 4 are respectively provided with standardized flange surfaces, and seals adapted to the wellhead device body 1 are distributed on the edges, thereby adapting to the quick-install connection requirements.

[0032] It can be understood that the sealing members in the present embodiment are all sealing rings, and the material of the sealing rings is rubber. In other embodiments, sealing rings made of plastic, metal, composite materials, etc. can also be used, and the specific selection can be made according to actual conditions.

[0033] like Figure 1 As shown, a connecting flange 5 is provided on the top of the wellhead device body 1, and a clamp connector 6 is provided outside the connecting flange 5. The connecting flange 5 and the wellhead device body 1 are connected to each other through the clamp connector 6. The clamp connector 6 is provided with a plurality of top screw assemblies 61 to compress the clamp connector 6.

[0034] Specifically, the top of the wellhead device body 1 is processed into a flange surface with a flange, the outer ring of the connecting flange 5 is provided with an annular groove, the clamp connector 6 adopts a split clamp structure (such as two semicircular clamps), and a protrusion adapted to the flange groove is provided on the inner side, and the two ends of the clamp are detachably connected to the wellhead device body 1 and the connecting flange 5 (including but not limited to hinge connection, threaded connection and snap connection, etc.), so as to achieve rapid opening and closing; multiple top screw assemblies 61 are evenly distributed on the outside of the clamp connector 6, and the end of the top screw assembly 61 is a conical pressure head. When screwed in, the pressure head presses against the outer surface of the clamp, forcing the inner flange of the clamp to tightly engage with the flange groove. By adopting a clamp-type quick connector, the present application can reduce the disassembly and assembly of the blowout preventer during drilling, reduce the drilling rig time, improve the operation efficiency, and improve the stability of the device.

[0035] Furthermore, the top screw assembly 61 is a mechanical component in the wellhead device for accurately positioning, fixing and sealing key components, which includes: a top screw body, a thrust bearing group, a sealing cover and an adjusting nut and other structures. In this embodiment, it ensures a stable fit between the clamp connector 6 and the connecting flange 5 and the wellhead device body 1 by applying a controllable axial force.

[0036] like Figure 1 As shown, a pipeline passing mechanism 51 is also provided on the connecting flange 5, and the output end of the pipeline passing mechanism 51 is inserted into the connecting flange 5 and the oil pipe hanger 4 in sequence.

[0037] Specifically, a through-type pipeline channel is pre-processed inside the connecting flange 5, and the channel axis is perpendicular to the flange mounting surface, allowing the output end of the through-pipeline mechanism 51 to be directly inserted; the pipeline output end is designed as a stepped guide head, the front end is inserted into the inner cavity of the tubing hanger 4, and the rear end is embedded in the flange channel to form a continuous flow channel. The main pipeline uses multiple sections of seamless steel pipes, which pass through the wellhead device in a straight line as the core transmission channel for high-pressure media (such as fracturing fluid and natural gas).

[0038] like Figure 1 As shown, a plurality of wing structures 7 are provided on the outside of the wellhead device body 1, and the wing structures 7 are symmetrically installed on both sides of the outer wall of the wellhead device body 1. The left wing structure 7 includes a manual flat valve 71, a threaded flange 72 and a pressure gauge assembly 73, which are connected in sequence from the inside to the outside, and the right wing structure 7 includes a manual flat valve 71 and a threaded flange 72, which are connected in sequence from the inside to the outside.

[0039] Specifically, the left wing structure 7 is composed of a manual flat valve 71 (close to the outer wall of the wellhead body), a threaded flange 72 (connected to the outer end of the valve), and a pressure gauge assembly 73 (installed on the outside of the flange) from the inside to the outside, and the three are directly connected by threads or clamps; the right wing structure 7 is composed of a manual flat valve 71 and a threaded flange 72 from the inside to the outside, and the two are directly connected in series without an additional monitoring module. Among them, the left wing structure 7 integrates the pressure monitoring function, and the right wing structure 7 only retains the basic on-off control, forming a functionally differentiated configuration. In this way, the left side realizes the integration of "control, monitoring, and expansion", and the right side focuses on basic fluid management to adapt to multiple scenario requirements; at the same time, the double-sided wing structure 7 can balance the external load of the wellhead device body 1 and reduce the stress concentration caused by eccentric load.

[0040] like Figure 1 As shown, the clamp-type quick-install wellhead device also includes a base 12, and the wellhead device body 1 is installed on the base 12. A gap 112 is provided between the bottom of the wellhead device body 1 and the casing hanger 2. A surface casing 113 is provided in the gap 112, and the surface casing 113 is detachably connected to the wellhead device body 1.

[0041] Specifically, the bottom of the wellhead device body 1 is processed into an annular cavity with an inner diameter slightly larger than the outer diameter of the casing hanger 2, forming a gap 112 surrounding the casing hanger 2; the height of the gap 112 is adjusted according to the installation requirements to ensure that the surface casing 113 has no rigid contact with the wellhead device body 1 and the casing hanger 2 after insertion. The outer wall of the surface casing 113 and the inner wall of the bottom of the wellhead device body 1 are provided with mutually matching threads, and the two are connected by threads to meet the requirements of detachable connection.

[0042] like Figure 1 As shown, an inner casing 114 is provided at the bottom of the casing hanger 2 , and the inner casing 114 is detachably connected to the casing hanger 2 .

[0043] Specifically, the bottom of the casing hanger 2 is processed into an internal thread interface, and the top of the inner casing 114 is correspondingly provided with an external thread, which is screwed in to achieve a detachable connection. The inner casing 114 can be independently detached, which facilitates the replacement of worn or corroded parts and avoids replacing the casing hanger 2 as a whole.

[0044] like Figure 1 As shown, the tubing hanger 4 is hollow and has an oil pipe 115 inside. The oil pipe 115 is detachably connected to the tubing hanger 4 .

[0045] Specifically, the tubing hanger 4 adopts an axially through hollow structure, with a channel formed inside that matches the outer diameter of the tubing 115, allowing the tubing 115 to pass through the upper and lower ends of the hanger; a thread is set on the inner wall of the channel, and a corresponding connecting structure is processed on the outer wall of the tubing 115 to achieve detachable fixation.

[0046] It can be understood that the above-mentioned detachable connection method, in addition to the threaded connection, can also be: snap-on connection, flange bolt connection, quick-release pin connection, etc. All of the above-mentioned connection methods can be used in the embodiments of the present application, and the specific selection is based on actual conditions.

[0047] See also Figures 2 to 5 The present invention also provides a method for installing a clamp-type quick-install wellhead device, the method comprising the following steps: S1, threading the casing hanger 2 onto the casing hanger running tool 8, tightening the thread to press the casing hanger 2 into the setting position at the bottom of the wellhead device body 1; Specifically, a casing hanger running tool 8 is used, and its front end is provided with an internal thread interface matching the casing hanger 2. The casing hanger 2 is screwed into the front end of the running tool until the thread is fully engaged; the tool is vertically inserted into the bottom of the wellhead device body 1, and torque is applied by rotating the tool to push the casing hanger 2 to move axially to the sealing position; after confirming that it is in place, the tool is rotated in the opposite direction to release the threaded connection and withdraw the tool.

[0048] S2, threading the rotary sealing sleeve 3 onto the rotary sealing sleeve delivery tool 9, tightening the thread to press the rotary sealing sleeve 3 into the setting position in the middle of the wellhead device body 1; Specifically, a rotary sealing sleeve is used to deliver a tool 9, the front end of the tool is an externally threaded rod matching the rotary sealing sleeve 3, and a guide key is provided on the surface of the rod body; the rotary sealing sleeve 3 is screwed into the threaded rod at the front end of the delivery tool; the tool is inserted into the middle of the wellhead device body 1, and the sealing sleeve is driven to move downward along the guide key by rotation until the limit ring contacts the upper end surface of the body; the rotation is maintained until the sealing sleeve is completely sealed, and the tool is screwed out in the reverse direction.

[0049] S3. Thread the rotary expansion assembly 42 onto the rotary compression running tool 10. When the tubing hanger 4 is lowered into the wellhead device body 1, tighten the rotary expansion assembly 42 to press the tubing hanger 4 into the sealing position at the top of the wellhead device body 1.

[0050] Specifically, the front end of the rotary compression running tool 10 is a conical expansion head, which matches the inner conical surface of the rotary expansion component 42; the rotary expansion component 42 is screwed into the front end of the running tool and pre-installed to the outer wall of the tubing hanger 4; the tubing hanger 4 is lowered as a whole to the top of the wellhead device body 1, and the expansion head is driven axially by the rotary tool to force the expansion component to expand radially and lock the tubing hanger 4; after confirming the sealing, the quick-release pin is released and the tool is withdrawn.

[0051] In summary, the present application adopts a rotary push-in installation to simplify the installation process; at the same time, it is installed or disassembled under a low axial load, which is convenient for installation or well repair, and the overall height is reduced and the structure is compact.

[0052] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0053] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0058] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0059] The above is a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A clamp-type quick-install wellhead device, characterized in that: include: A wellhead device body, wherein the wellhead device body is provided with a mounting groove, and a plurality of sealing grooves are provided on the groove wall of the mounting groove; A casing hanger, the casing hanger is installed at the bottom of the installation groove, the casing hanger is provided with a casing hanger main seal, and the casing hanger main seal is connected to the corresponding sealing groove on the installation groove; A rotary sealing sleeve, the rotary sealing sleeve is installed on the upper part of the casing hanger, the rotary sealing sleeve is provided with a first sealing assembly, and the first sealing assembly is connected to the corresponding sealing groove on the mounting groove; The tubing hanger is installed on the upper part of the rotary sealing sleeve, and is provided with a rotary expansion assembly and a second sealing assembly. The rotary expansion assembly is installed outside the rotary expansion assembly, and the second sealing assembly is connected to the corresponding sealing groove on the mounting groove.

2. The clamp-type quick-install wellhead device according to claim 1, characterized in that: The first sealing assembly includes: a sealing sleeve main seal, a sealing sleeve secondary seal and a rotating sealing sleeve seal, the sealing sleeve main seal is located in the middle of the rotating sealing sleeve, the sealing sleeve secondary seal is located at the bottom of the rotating sealing sleeve, and the rotating sealing sleeve seal is located between the rotating sealing sleeve and the wellhead device body.

3. The clamp-type quick-install wellhead device according to claim 1, characterized in that: The second sealing assembly includes: a tubing hanger main seal and a tubing hanger secondary seal, the tubing hanger main seal is located in the middle of the tubing hanger, and the tubing hanger secondary seal is located at the top of the tubing hanger.

4. The clamp-type quick-install wellhead device according to claim 1, characterized in that: A connecting flange is provided on the top of the wellhead device body, a clamp connector is provided outside the connecting flange, the connecting flange and the wellhead device body are connected to each other through the clamp connector, and a plurality of top screw assemblies are provided on the clamp connector to compress the clamp connector.

5. The clamp-type quick-install wellhead device according to claim 4, characterized in that: The connecting flange is also provided with a pipeline crossing mechanism, and the output end of the pipeline crossing mechanism is inserted into the connecting flange and the oil pipe hanger in sequence.

6. The clamp-type quick-install wellhead device according to claim 1, characterized in that: A plurality of wing-type structures are provided on the outside of the wellhead device body, and the wing-type structures are symmetrically installed on both sides of the outer wall of the wellhead device body. The wing-type structure on the left side includes a manual flat valve, a threaded flange and a pressure gauge assembly, which are connected in sequence from the inside to the outside, and the wing-type structure on the right side includes a manual flat valve and a threaded flange, which are connected in sequence from the inside to the outside.

7. The clamp-type quick-install wellhead device according to claim 1, characterized in that: It also includes a base, the wellhead device body is installed on the base, a gap is provided between the bottom of the wellhead device body and the casing hanger, a surface casing is provided in the gap, and the surface casing is detachably connected to the wellhead device body.

8. The clamp-type quick-install wellhead device according to claim 1, characterized in that: An inner casing is provided at the bottom of the casing hanger, and the inner casing is detachably connected to the casing hanger.

9. The clamp-type quick-install wellhead device according to claim 1, characterized in that: The tubing hanger is hollow and has an oil pipe inside. The oil pipe is detachably connected to the tubing hanger.

10. A method for installing a clamp-type quick-install wellhead device, characterized in that: The method comprises the following steps: Installing the casing hanger thread on the casing hanger running tool, tightening the thread to press the casing hanger into the setting position at the bottom of the wellhead device body; Installing the rotary seal sleeve thread on the rotary seal sleeve delivery tool, tightening the thread to press the rotary seal sleeve into the sealing position in the middle of the wellhead device body; The rotary expansion assembly is threadedly mounted on the rotary compression running tool. When the tubing hanger is lowered into the wellhead device body, the rotary expansion assembly is tightened to press the tubing hanger into the sealing position at the top of the wellhead device body.

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