A clamp-type quick-installation wellhead device and its installation method

Abstract

The present application relates to a clamp-type quick-installation wellhead device and an installation method thereof, including: a wellhead device body, the wellhead device body is provided with an installation groove, and a plurality of sealing grooves are provided on the groove wall of the installation groove; a casing hanger, the casing hanger is installed at the bottom of the installation groove, a main sealing member of the casing hanger is provided on the casing hanger, and the main sealing member of the casing hanger is connected to the corresponding sealing groove; a rotary sealing sleeve, the rotary sealing sleeve is installed on the upper part of the casing hanger, a first sealing assembly is provided on the rotary sealing sleeve, and the first sealing assembly is connected to the corresponding sealing groove; a tubing hanger, the tubing hanger is installed on the upper part of the rotary sealing sleeve, a rotary expansion assembly and a second sealing assembly are provided on the tubing hanger, the rotary expansion assembly is installed outside the rotary expansion assembly, and the second sealing assembly is connected to the corresponding sealing groove. Compared with the prior art, the present application can prevent the problem of sealing failure and installation failure caused by the improper installation of the hanger, thereby improving the installation efficiency.

Description

Technical Field

[0001] This application relates to the field of oil extraction equipment, and particularly to a clamp-type quick-installation wellhead device and its installation method. Background Art

[0002] During the drilling process of oil and gas wells, the quick-installation wellhead device is a key equipment for oil and gas exploitation, which is widely used in multiple fields such as conventional and unconventional oil and gas field development, offshore operations, complex geological conditions, and emergency repair. It quickly connects the casing hanger and the wellhead through quick-connection components to form an independent bearing mechanism, and uses sealing technology to seal the gap between the casing and the wellhead, improving the installation efficiency and safety of the wellhead device. However, currently, the existing quick-installation wellhead devices generally have problems such as the inclination of the hanger after it is lowered or the presence of broken rock debris at the setting position of the hanger, resulting in improper installation. If the installation is not in place, it will cause the seal of the hanger to fail, and further lead to the risk of wellhead installation failure. Summary of the Invention

[0003] This application provides a clamp-type quick-installation wellhead device and its installation method to solve the technical problem in the prior art that the hanger is not properly installed, resulting in the failure of the hanger seal and the failure of wellhead installation.

[0004] In the first aspect, this application provides a clamp-type quick-installation wellhead device, including:

[0005] A wellhead device body, which is provided with an installation groove, and several sealing grooves are arranged on the groove wall of the installation groove;

[0006] A casing hanger, which is installed at the bottom of the installation groove, and a main casing hanger seal is provided on the casing hanger, and the main casing hanger seal is connected to the corresponding sealing groove on the installation groove;

[0007] A rotating seal sleeve, which is installed on the upper part of the casing hanger, and a first sealing component is provided on the rotating seal sleeve, and the first sealing component is connected to the corresponding sealing groove on the installation groove;

[0008] A tubing hanger, which is installed on the upper part of the rotating seal sleeve, and a rotating expansion component and a second sealing component are provided on the tubing hanger, the rotating expansion component is installed outside the rotating expansion component, and the second sealing component is connected to the corresponding sealing groove on the installation groove.

[0009] Further, the first sealing assembly includes: a sealing sleeve main seal, a sealing sleeve secondary seal, and a rotary sealing sleeve seal. The sealing sleeve main seal is located in the middle of the rotary sealing sleeve, the sealing sleeve secondary seal is located at the bottom of the rotary sealing sleeve, and the rotary sealing sleeve seal is located between the rotary sealing sleeve and the wellhead device body.

[0010] Further, 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.

[0011] Further, a connecting flange is provided at 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. A plurality of jacking screw assemblies are provided on the clamp connector to compress the clamp connector.

[0012] Further, a pipeline crossing mechanism is also provided on the connecting flange. The output end of the pipeline crossing mechanism is sequentially inserted into the connecting flange and the tubing hanger.

[0013] Further, a plurality of wing structures are provided outside the wellhead device body. The wing structures are symmetrically installed on both sides of the outer wall of the wellhead device body. The left wing structure includes a manual flat valve, a threaded flange, and a pressure gauge assembly, which are connected in sequence from the inside out. The right wing structure includes a manual flat valve and a threaded flange, which are connected in sequence from the inside out.

[0014] Further, the clamp - type quick - installation wellhead device further 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. The surface casing is detachably connected to the wellhead device body.

[0015] Further, an inner casing is provided at the bottom of the casing hanger. The inner casing is detachably connected to the casing hanger.

[0016] Further, the tubing hanger is hollow - designed and a tubing is provided inside. The tubing is detachably connected to the tubing hanger.

[0017] In a second aspect, the present invention also provides a method for installing a clamp - type quick - installation wellhead device. The method includes the following steps:

[0018] Thread - install the casing hanger on the casing hanger running tool, and tighten the thread to press the casing hanger into the setting position at the bottom of the wellhead device body.

[0019] Threadedly install the rotary seal sleeve on the rotary seal sleeve feeding tool, and tighten the thread to press the rotary seal sleeve into the setting position in the middle of the wellhead device body;

[0020] Threadedly install the rotary expansion assembly on the rotary compression feeding tool. After the tubing hanger is lowered into the wellhead device body, tighten the rotary expansion assembly to press the tubing hanger into the setting position at the top of the wellhead device body.

[0021] The above technical solution provided by this application has the following advantages compared with the prior art:

[0022] In the technical solution of this application, multiple installation grooves and sealing grooves are provided in the wellhead device body, and a casing hanger (bottom), a rotary seal sleeve (middle), and a tubing hanger (top) are integrated in sequence; each layer of hanger / seal sleeve is connected to the corresponding sealing groove through an independent sealing component to form a multi-stage redundant seal. At the same time, the rotary seal sleeve can rotate axially to adapt to the installation deviation between the wellhead device body and the casing hanger; the tubing hanger integrates a rotary expansion assembly, and realizes radial expansion and locking through a rotary action to eliminate assembly deviation. Compared with the prior art, the hanger in this application adopts a swelling type sealing structure and an anti-chip design, which can prevent the problems of tilting after the hanger is installed or incomplete installation caused by broken rock chips at the setting position, resulting in sealing failure and installation failure, thereby greatly improving the installation efficiency. Description of the Drawings

[0023] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0025] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the drawings do not constitute a proportional limitation.

[0026] Figure 1 It is a cross-sectional view of a clamp-type quick-install wellhead device provided by an embodiment of this application;

[0027] Figure 2 It is a schematic installation structure diagram of a casing feeding tool and a casing hanger in a method for installing a clamp-type quick-install wellhead device provided by an embodiment of this application;

[0028] Figure 3 Schematic diagram of the installation structure of the rotary seal sleeve feeding tool and the rotary seal sleeve in a method for installing a clamp - type quick - installation wellhead device provided by an embodiment of the present application;

[0029] Figure 4 Schematic diagram of the installation structure of the rotary pressing - in feeding tool and the rotary expansion assembly in a method for installing a clamp - type quick - installation wellhead device provided by an embodiment of the present application;

[0030] Figure 5 Schematic flow diagram of a method for installing a clamp - type quick - installation wellhead device provided by an embodiment of the present application.

[0031] Explanation of reference numerals:

[0032] 1. Wellhead device body; 11. Installation groove; 111. Sealing groove; 112. Gap; 113. Surface casing; 114. Inner casing; 115. Oil pipe; 12. Base;

[0033] 2. Casing hanger; 21. Main seal of the casing hanger;

[0034] 3. Rotary seal sleeve; 31. First sealing assembly; 311. Main seal of the seal sleeve; 312. Auxiliary seal of the seal sleeve; 313. Seal of the rotary seal sleeve;

[0035] 4. Tubing hanger; 41. Second sealing assembly; 411. Main seal of the tubing hanger; 412. Auxiliary seal of the tubing hanger; 42. Rotary expansion assembly;

[0036] 5. Connecting flange; 51. Pipeline crossing mechanism;

[0037] 6. Clamp connector; 61. Jackscrew assembly;

[0038] 7. Wing - type structure; 71. Manual flat valve; 72. Threaded flange; 73. Pressure gauge assembly;

[0039] 8. Casing hanger feeding tool; 9. Rotary seal sleeve feeding tool; 10. Rotary pressing - in feeding tool. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0041] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0042] For ease of description, spatially relative relationship terms may be used in the text to describe the relative positional relationship or movement of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", "front", "rear", etc. Such spatially relative relationship terms are intended to include different orientations of the device in use or operation other than the orientations depicted in the figure. For example, if the device in the figure undergoes a position reversal, attitude change, or change in motion state, then these directional indications will change accordingly. For example, an element described as "below other elements or features" or "beneath other elements or features" will subsequently be oriented as "above other elements or features" or "over other elements or features". Therefore, the exemplary term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatially relative relationship descriptors used in the text are interpreted accordingly.

[0043] In order to solve the technical problems existing in the existing quick-install wellhead device, such as the hanger tilting after being lowered or the installation not being in place due to broken rock debris at the hanger setting position, the present application provides a clamp-type quick-install wellhead device and its installation method, which can prevent the problems of the hanger tilting after installation or the installation not being in place caused by broken rock debris at the setting position, resulting in seal failure and installation failure, thereby greatly improving the installation efficiency.

[0044] Please refer to Figure 1, a clamp - type quick - installation wellhead device provided by an embodiment of the present application includes: a wellhead device body 1, the wellhead device body 1 is provided with an installation groove 11, and a plurality of sealing grooves 111 are provided on the groove wall of the installation groove 11; a casing hanger 2, the casing hanger 2 is installed at the bottom of the installation groove 11, a main sealing member 21 of the casing hanger is provided on the casing hanger 2, and the main sealing member 21 of the casing hanger is connected to the corresponding sealing groove 111 on the installation groove 11; a rotary sealing sleeve 3, the rotary sealing sleeve 3 is installed on the upper part of the casing hanger 2, a first sealing assembly 31 is provided on the rotary sealing sleeve 3, and the first sealing assembly 31 is connected to the corresponding sealing groove 111 on the installation groove 11; a tubing hanger 4, the tubing hanger 4 is installed on the upper part of the rotary sealing sleeve 3, a rotary expansion and tightening assembly 42 and a second sealing assembly 41 are provided on the tubing hanger 4, the rotary expansion and tightening assembly 42 is installed outside the rotary expansion and tightening assembly 42, and the second sealing assembly 41 is connected to the corresponding sealing groove 111 on the installation groove 11.

[0045] Specifically, a stepped installation groove 11 is opened inside the wellhead device body 1 of the present application, and multiple annular sealing grooves 111 are preset on the groove wall for fixing each component in layers; the casing hanger 2 is installed in the installation groove 11 at the bottom of the wellhead device body 1, and is pressed against the corresponding sealing groove 111 through the main sealing member to achieve casing fixation and primary sealing; the rotary sealing sleeve 3 is sleeved above the casing hanger 2 and can rotate around the axis, and its first sealing assembly 31 is dynamically attached to the sealing groove 111 to compensate for installation deviation; the tubing hanger 4 is located above the rotary sealing sleeve 3, the tubing 115 is radially expanded and locked through the rotary expansion and tightening assembly 42, and at the same time the second sealing assembly 41 is connected to the sealing groove 111 to form the end sealing. The present application adopts layered independent sealing, in which the main sealing member, the first sealing assembly 31, and the second sealing assembly 41 form a redundant barrier to improve the reliability under high - pressure conditions; secondly, the rotary sealing sleeve 3 and the rotary expansion and tightening assembly 42 allow self - correction of angular deviation, can reduce the dependence on installation accuracy, and dynamically adjust the installation non - compliance caused by the inclination after the hanger is lowered or the presence of broken rock debris at the hanger setting position; the damaged sealing assembly can be replaced separately without disassembling the overall structure, reducing the maintenance cost.

[0046] Further, the rotary expansion and tightening assembly 42 includes an inner conical sleeve and outer expansion blocks. The inner wall of the inner conical sleeve is provided with a spiral groove, and the outer wall of the outer expansion block is provided with a conical surface; by rotating and pressing the rotary expansion and tightening assembly 42, the tubing hanger 4 is driven to move along the axis, and the outer expansion blocks are radially expanded under the extrusion of the conical surface, tightly holding the outer wall of the tubing 115, and at the same time forming an interference fit with the inner wall of the wellhead device body 1. The thread of the inner conical sleeve adopts a single - start serrated thread, which is self - locking in the reverse direction after rotation in place to prevent loosening caused by operation vibration.

[0047] As Figure 1As shown in the figure, the first sealing assembly 31 includes: a main sealing member 311 of the sealing sleeve, a secondary sealing member 312 of the sealing sleeve, and a sealing member 313 of the rotating sealing sleeve. The main sealing member 311 of the sealing sleeve is located in the middle of the rotating sealing sleeve 3, the secondary sealing member 312 of the sealing sleeve is located at the bottom of the rotating sealing sleeve 3, and the sealing member 313 of the rotating sealing sleeve is located between the rotating sealing sleeve 3 and the wellhead device body 1.

[0048] Specifically, the main sealing member 311 of the sealing sleeve is installed in the middle of the rotating sealing sleeve 3 to form a static main seal with the sealing surface of the installation groove 11; the secondary sealing member 312 of the sealing sleeve is located at the bottom of the rotating sealing sleeve 3 and is designed as a double-lip sealing structure, which expands adaptively under axial pressure to enhance the bottom sealing performance; the sealing member 313 of the rotating sealing sleeve is arranged between the outer wall of the rotating sealing sleeve 3 and the inner wall of the wellhead device body 1 and is made of a material with a low coefficient of friction to allow the rotating sealing sleeve 3 to maintain a dynamic seal when rotating.

[0049] As Figure 1 shown in the figure, the second sealing assembly 41 includes: a main sealing member 411 of the tubing hanger and a secondary sealing member 412 of the tubing hanger. The main sealing member 411 of the tubing hanger is located in the middle of the tubing hanger 4, and the secondary sealing member 412 of the tubing hanger is located at the top of the tubing hanger 4.

[0050] Specifically, the main sealing member 411 of the tubing hanger is installed in the middle of the tubing hanger 4 and adopts a multi-stage stepped sealing structure to form a rigid contact with the sealing groove 111 of the wellhead device body 1 as the core sealing barrier; the secondary sealing member 412 of the tubing hanger is arranged at the top of the tubing hanger 4 and automatically compresses the sealing surface under the action of the medium pressure to achieve auxiliary sealing.

[0051] Furthermore, standardized flange surfaces are provided at the top and bottom of the tubing hanger 4 respectively, and sealing members adapted to the wellhead device body 1 are distributed at the edges to meet the requirements of quick-connection.

[0052] It can be understood that the sealing members in this embodiment are all sealing rings, and the material of the sealing ring is rubber. In other embodiments, sealing rings made of plastic, metal, composite materials, etc. can also be used, and specific selection can be made according to actual situations.

[0053] As Figure 1 shown in the figure, a connecting flange 5 is provided at 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, and a number of jack assemblies 61 are provided on the clamp connector 6 to compress the clamp connector 6.

[0054] Specifically, the top of the wellhead device body 1 is processed into a flanged surface with a flange. An annular groove is provided on the outer ring of the connecting flange 5. The clamp connector 6 adopts a split clamp structure (such as two semi-circular clamps), and a protrusion adapted to the flange groove is provided on the inner side. 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 connection methods such as hinge connection, threaded connection, and snap connection, etc.), realizing quick opening and closing. A plurality of jacking screw assemblies 61 are evenly distributed outside the clamp connector 6. The end of the jacking screw assembly 61 is a conical pressing head. When screwed in, the pressing 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 the clamp-type quick connector in this application, the disassembly and assembly of the blowout preventer during drilling can be reduced, the rig time can be shortened, the operation efficiency can be improved, and at the same time, the stability of the device can be enhanced.

[0055] Furthermore, the jacking screw assembly 61 is a mechanical component in the wellhead device for accurately positioning, fixing, and sealing key components. It includes structures such as a jacking screw body, a thrust bearing group, a sealing gland, and an adjusting nut. In this embodiment, by applying a controllable axial force, it ensures stable fitting between the clamp connector 6, the connecting flange 5, and the wellhead device body 1.

[0056] As Figure 1 shown, a pipeline passing-through mechanism 51 is also provided on the connecting flange 5. The output end of the pipeline passing-through mechanism 51 is sequentially inserted into the connecting flange 5 and the tubing hanger 4.

[0057] Specifically, a through-type pipeline channel is pre-processed inside the connecting flange 5. The axis of the channel is perpendicular to the flange mounting surface, allowing the output end of the pipeline passing-through 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 path. The main pipeline is composed of multiple sections of seamless steel pipes, running straight through the wellhead device, serving as the core transmission channel for high-pressure media (such as fracturing fluid, natural gas).

[0058] As Figure 1 shown, several wing structures 7 are provided outside the wellhead device body 1. 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 out. The right wing structure 7 includes a manual flat valve 71 and a threaded flange 72, which are connected in sequence from the inside out.

[0059] Specifically, the left wing structure 7 from inside to outside is successively a manual flat valve 71 (close to the outer wall of the wellhead body), a threaded flange 72 (connecting the outer end of the valve), and a pressure gauge assembly 73 (installed outside the flange). The three are directly connected by threads or clamps; the right wing structure 7 from inside to outside is successively a manual flat valve 71 and a threaded flange 72, 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 functional differential 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 the needs of multiple scenarios; at the same time, the double-wing structure 7 can balance the external load of the wellhead device body 1 and reduce the stress concentration caused by eccentric load.

[0060] As Figure 1 shown, the clamp-type quick-install wellhead device further includes a base 12. The wellhead device body 1 is installed on the base 12. There is a gap 112 between the bottom of the wellhead device body 1 and the casing hanger 2. A surface casing 113 is arranged in the gap 112, and the surface casing 113 is detachably connected to the wellhead device body 1.

[0061] 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 there is no rigid contact between the surface casing 113 and the wellhead device body 1 and the casing hanger 2 after the surface casing 113 is inserted. Threads are provided on the outer wall of the surface casing 113 and the inner wall of the bottom of the wellhead device body 1, and the two are connected by threads to meet the requirements of detachable connection.

[0062] As Figure 1 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.

[0063] 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, and the detachable connection is realized by screwing in. By the way that the inner casing 114 can be independently disassembled, it is convenient to replace the worn or corroded part and avoid replacing the entire casing hanger 2.

[0064] As Figure 1 shown, the tubing hanger 4 is hollow inside and there is a tubing 115 inside, and the tubing 115 is detachably connected to the tubing hanger 4.

[0065] Specifically, the tubing hanger 4 adopts an axially penetrating hollow structure, and a channel matching the outer diameter of the tubing 115 is formed inside, allowing the tubing 115 to penetrate through the upper and lower ends of the hanger; threads are provided on the inner wall of the channel, and a connection structure is correspondingly processed on the outer wall of the tubing 115 to realize detachable fixation.

[0066] It is understandable that the above detachable connection method can be, in addition to threaded connection, snap connection, flange bolt connection, quick-release pin connection, etc. Each of the above connection methods can be used in the embodiments of the present application and is specifically selected according to the actual situation.

[0067] Please refer to Figures 2 to 5 , the present invention also provides a method for installing a clamp-type quick-install wellhead device, and the method includes the following steps:

[0068] S1. Threadedly install the casing hanger 2 on the casing hanger running tool 8, and tighten the thread to press the casing hanger 2 into the setting position at the bottom of the wellhead device body 1.

[0069] Specifically, use the casing hanger running tool 8, the front end of which is provided with an internal thread interface matching the casing hanger 2. Screw the casing hanger 2 into the front end of the running tool until the thread is fully engaged; vertically insert the tool into the bottom of the wellhead device body 1, apply torque by rotating the tool, and push the casing hanger 2 to move axially to the setting position; after confirming in place, reverse-rotate the tool to release the threaded connection and withdraw the tool.

[0070] S2. Threadedly install the rotary seal sleeve 3 on the rotary seal sleeve running tool 9, and tighten the thread to press the rotary seal sleeve 3 into the setting position in the middle of the wellhead device body 1.

[0071] Specifically, use the rotary seal sleeve running tool 9, the front end of the tool is an external threaded rod matching the rotary seal sleeve 3, and the surface of the rod body is provided with a guide key; screw the rotary seal sleeve 3 onto the front end threaded rod of the running tool; insert the tool into the middle of the wellhead device body 1, and drive the seal sleeve to move downward along the guide key by rotation until the limiting ring contacts the upper end face of the body; keep rotating until the seal sleeve is fully set, and reverse-rotate the tool to withdraw it.

[0072] S3. Threadedly install the rotary expansion assembly 42 on the rotary compression running tool 10. After 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 setting position at the top of the wellhead device body 1.

[0073] 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 assembly 42; screw the rotary expansion assembly 42 onto the front end of the running tool and pre-install it on the outer wall of the tubing hanger 4; lower the whole tubing hanger 4 to the top of the wellhead device body 1, drive the expansion head to move axially by rotating the tool, force the expansion assembly to expand radially, and lock the tubing hanger 4; after confirming the setting, remove the quick-release pin and withdraw the tool.

[0074] In summary, the present application adopts a rotary push-in type installation, which simplifies the installation process; at the same time, it is installed or disassembled under low axial load, which is convenient for installation or workover, the overall height is reduced, and the structure is compact.

[0075] In the above embodiments, the descriptions of the various embodiments each have their own emphasis. For parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0076] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0077] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0078] In the present application, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0079] In the present application, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0080] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0081] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, provided that these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these changes and modifications.

[0082] As described above, the above is the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered by the protection scope of this application. Therefore, the protection scope of this application shall be subject to 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; A tubing hanger, the tubing hanger is mounted on the upper part of the rotary sealing sleeve, the tubing hanger is provided with a rotary expansion assembly and a second sealing assembly, the rotary expansion assembly is mounted outside the rotary expansion assembly, and the second sealing assembly is connected to the corresponding sealing groove on the mounting groove; The first sealing assembly comprises: a sealing sleeve main seal, a sealing sleeve secondary seal and a rotary sealing sleeve seal, wherein the sealing sleeve main seal is located in the middle of the rotary sealing sleeve, the sealing sleeve secondary seal is located at the bottom of the rotary sealing sleeve, and the rotary sealing sleeve seal is located between the rotary sealing sleeve and the wellhead device body; 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.

2. 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.

3. The clamp-type quick-install wellhead device according to claim 2, 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. A method for installing a clamp-type quick-install wellhead device, comprising the clamp-type quick-install wellhead device as described in claims 1 to 7, 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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