Casing pipe clamping device and drilling equipment

Abstract

The invention relates to the technical field of drilling equipment, and discloses a casing clamping device and drilling equipment. The sleeve clamping device comprises a mounting bracket, a rotary clamping structure and a driving structure. The rotary clamping structure is installed on the installation support and used for clamping or loosening the casing pipe, and when the casing pipe is clamped, the rotary clamping structure is further used for driving the casing pipe to rotate around the axial direction of the casing pipe. The driving structure is mounted on the mounting bracket, is used for being detachably connected with the derrick and is used for driving the rotary clamping structure through the mounting bracket, so that the sleeve is driven to do reciprocating motion in the axial direction of the sleeve. Through mutual cooperation of the rotary clamping structure and the driving structure, the casing can move in the axial direction of the casing and can also rotate in the axial direction of the casing, it is guaranteed that casing running operation and well drilling operation can be conducted synchronously, the shaft wall protection effect is achieved, the time for running the casing after well drilling and completion is saved, the casing running operation process is simplified, and the well drilling efficiency is improved. The defect that in the prior art, the casing running operation process is complex is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling equipment, and in particular to a casing clamping device and drilling equipment. Background Art

[0002] Conventional drilling usually involves casing operation after the completion of the first and second drilling. During the operation, there are certain risks due to the complex formations in the well, especially the local collapse of the well wall caused by the loose formation. Usually, casing is put in advance, such as seamless steel pipe, to reinforce the hole to prevent the foundation formation from being washed away during the circulation of drilling fluid. The casing operation is relatively complicated. Therefore, how to simplify the casing operation process is an urgent problem to be solved in the industry. Summary of the invention

[0003] The invention provides a casing clamping device and drilling equipment, which are used to solve the defect that the casing lowering operation process is relatively complicated in the prior art.

[0004] The present invention provides a casing clamping device, comprising: Mounting bracket; A rotating clamping structure is installed on the mounting bracket; the rotating clamping structure is used to clamp or loosen the sleeve, and when clamping the sleeve, the rotating clamping structure is also used to drive the sleeve to rotate around its own axis; A driving structure is installed on the mounting bracket, and the driving structure is used to be detachably connected to the derrick, and is used to drive the rotating clamping structure through the mounting bracket, thereby driving the casing to reciprocate along its own axial direction.

[0005] According to the casing clamping device provided by the present invention, the rotating clamping structure comprises: The clamping component comprises a plurality of the clamping assemblies; the clamping assemblies are connected to the mounting bracket; the plurality of the clamping assemblies are arranged at intervals along the circumference of the sleeve, and the plurality of the clamping assemblies are used to clamp or loosen the sleeve; A first rotation driving component is mounted on the mounting bracket; the first rotation driving component is circumferentially limited with the clamping assembly, and the first rotation driving component is used to drive the sleeve to rotate around its own axis through a plurality of the clamping assemblies.

[0006] According to the casing clamping device provided by the present invention, the first rotation driving component comprises: The core tube is used to be sleeved on the outer side of the sleeve and cooperate with the mounting bracket to rotate around the axial direction of the sleeve; a plurality of sliding holes are opened on the tube wall of the core tube, and the plurality of sliding holes are arranged at intervals along the circumference of the core tube. The plurality of sliding holes correspond to the plurality of clamping assemblies one by one and are circumferentially limited with the clamping assemblies; A rotation drive assembly is installed on the installation bracket and connected to the core tube; the rotation drive assembly drives the plurality of clamping assemblies through the core tube to drive the sleeve to rotate.

[0007] According to the casing clamping device provided by the present invention, the core tube comprises: A tube body, which is sleeved on the outer side of the sleeve and cooperates with the mounting bracket to rotate around the axial direction of the sleeve; Gear teeth are formed on the outer side of the tube body along the circumference of the tube body, and the gear teeth are meshed and connected with the rotary drive assembly.

[0008] According to the casing clamping device provided by the present invention, the clamping component further comprises: A clamping drive assembly is connected to the plurality of clamping assemblies; the clamping drive assembly is used to press the clamping assembly toward the sleeve so that the plurality of clamping assemblies clamp the sleeve.

[0009] According to the sleeve clamping device provided by the present invention, the clamping assembly and the sliding hole are slidably matched in the up-down direction; a side surface of the clamping assembly away from the sleeve is an inclined surface; the clamping drive assembly comprises: a first connecting member, one end of which is hinged to the mounting bracket, and the other end of which is hinged to the clamping assembly; A second connecting member, wherein a sliding groove is provided on a side of the second connecting member facing the clamping assembly along the up-down direction, and a bottom of the sliding groove contacts the inclined surface; A clamping driving member, one end of which is hinged to the mounting bracket, and the other end of which is hinged to the second connecting member, for driving the second connecting member to slide and cooperate with the clamping assembly along the up-down direction.

[0010] According to the casing clamping device provided by the present invention, the second connecting member comprises: A collar is sleeved on the outside of the clamping assembly and is used to cooperate with the sleeve around the axial rotation of the sleeve; a plurality of slide grooves are provided on the inner side surface of the collar, and the plurality of slide grooves are spaced apart along the circumference of the collar, and the plurality of slide grooves correspond one-to-one to the plurality of clamping assemblies.

[0011] According to the casing clamping device provided by the present invention, the clamping assembly comprises: A first clamping member connected to the mounting bracket; The second clamping member is installed on a side of the first clamping member facing the sleeve and is detachably connected to the first clamping member.

[0012] According to the casing clamping device provided by the present invention, the clamping assembly further comprises: A circumferential limiting member, through which the first clamping member and the second clamping member are connected; or / and; An axial limiter, wherein the first clamping member and the second clamping member are connected with each other through the axial limiter.

[0013] A second aspect of the present invention provides a drilling equipment, comprising any one of the above-mentioned casing clamping devices.

[0014] The casing clamping device provided by the present invention can provide an installation foundation for the rotating clamping structure and the driving structure by setting a mounting bracket. By setting a driving structure that is detachably connected to the derrick, the driving structure is connected to the derrick when casing operation is required. At this time, the casing can be clamped by the rotating clamping structure installed on the mounting bracket, and the casing can be driven to rotate; then the rotating clamping structure is driven by the driving structure installed on the mounting bracket to reciprocate along the axial direction of the casing, thereby driving the casing to reciprocate along its own axial direction, providing the casing with an upward lifting force and a downward feeding force. Through the mutual cooperation of the rotating clamping structure and the driving structure, the casing can be rotated around its own axial direction while moving along its own axial direction, ensuring that the casing operation and the drilling operation can be carried out synchronously, and there is no need to lower the casing in advance, that is, the wellbore wall protection effect is achieved and the time for lowering the casing after drilling is saved, the casing lowering operation process is simplified, and the defect of the relatively complicated casing lowering operation process in the prior art is solved.

[0015] The drilling equipment provided by the present invention includes the above-mentioned casing clamping device, and thus has at least the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is one of the structural schematic diagrams of the casing clamping device provided by the present invention.

[0018] Figure 2 This is the second structural schematic diagram of the casing clamping device provided by the present invention.

[0019] Figure 3 This is the third structural schematic diagram of the casing clamping device provided by the present invention.

[0020] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure.

[0021] Figure 5 The invention relates to an explosive structure entity of a casing clamping device.

[0022] Figure 6 It is a schematic structural diagram of the second connecting piece of the sleeve clamping device provided by the present invention.

[0023] Figure 7 This is one of the structural schematic diagrams of the clamping assembly of the casing clamping device provided by the present invention.

[0024] Figure 8 This is the second structural schematic diagram of the clamping assembly of the casing clamping device provided by the present invention.

[0025] Fig. 9 This is the third structural schematic diagram of the clamping assembly of the casing clamping device provided by the present invention.

[0026] Reference numerals: 100, mounting bracket; 110, first mounting sleeve; 120, second mounting sleeve; 130, mounting plate; 200, rotary clamping structure; 210, clamping member; 220, first rotary drive member; 211, clamping assembly; 212, clamping drive assembly; 221, core tube; 222, rotary drive assembly; 223, tube body; 224, gear teeth; 225, slide hole; 2111, first clamping member; 2112, second clamping member; 2113, inclined surface; 2114, abutment portion; 2116, first groove; 2117, first protrusion; 2118, second groove; 2119, second protrusion; 2121, first connecting member; 2122, second connecting member; 2123, clamping drive member; 2124, slide groove; 2125, collar; 300, driving structure; 400, casing; 500, derrick; 510, orifice plate; 520, column. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0030] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] 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 embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer 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 and the features of the different embodiments or examples, without contradiction.

[0032] Combine the following Figures 1 to 9 The sleeve clamping device provided by the present invention is described in detail.

[0033] like Figures 1 to 9 As shown, a specific embodiment of the first aspect of the present invention provides a casing clamping device. The casing clamping device includes a mounting bracket 100, a rotating clamping structure 200 and a driving structure 300.

[0034] The rotating clamping structure 200 is installed on the mounting bracket 100, and is used to clamp or loosen the casing 400. When clamping the casing 400, the rotating clamping structure 200 is also used to drive the casing 400 to rotate around its own axis. The driving structure 300 is installed on the mounting bracket 100, and is used to be detachably connected to the derrick 500, and is used to drive the rotating clamping structure 200 through the mounting bracket 100, thereby driving the casing 400 to reciprocate along its own axis.

[0035] In this embodiment, by providing the mounting bracket 100, a mounting base can be provided for the rotating clamping structure 200 and the driving structure 300. By providing the driving structure 300 detachably connected to the derrick 500, when the casing 400 operation is required, the driving structure 300 is connected to the derrick 500. At this time, the casing 400 can be clamped by the rotating clamping structure 200 installed on the mounting bracket 100, and the casing 400 can be driven to rotate; and then the rotating clamping structure 200 can be driven by the driving structure 300 installed on the mounting bracket 100 to reciprocate along the axial direction of the casing, thereby driving the casing 400 to reciprocate along its own axial direction, providing the casing 400 with an upward lifting force and a downward feeding force. By cooperating with the rotating clamping structure 200 and the driving structure 300, the casing 400 can rotate around its own axis while moving along its own axis, ensuring that the casing 400 operation and the drilling operation can be carried out simultaneously. There is no need to lower the casing 400 in advance, which not only achieves the wellbore wall protection effect but also saves the time for lowering the casing 400 after drilling the well, simplifies the casing 400 operation process, and solves the defect that the casing 400 operation process in the prior art is relatively complicated.

[0036] In addition, when the casing 400 operation is not needed, the driving structure 300 can be separated from the derrick, so that the casing clamping device can be removed from the derrick as a whole to achieve conventional drilling.

[0037] like Figures 3 to 6As shown, in some embodiments, the rotary clamping structure 200 includes a clamping component 210 and a first rotary driving component 220. The clamping component 210 includes a plurality of clamping assemblies 211; the clamping assemblies 211 are connected to the mounting bracket 100; the plurality of clamping assemblies 211 are arranged at intervals along the circumference of the sleeve 400, and the plurality of clamping assemblies 211 are used to clamp or loosen the sleeve 400. The first rotary driving component 220 is mounted on the mounting bracket 100; the first rotary driving component 220 is limitedly matched with the clamping assemblies 211 in the circumferential direction, and the first rotary driving component 220 is used to drive the sleeve 400 to rotate around its own axis through the plurality of clamping assemblies 211.

[0038] In this embodiment, the rotating clamping structure 200 is arranged at intervals along the circumference of the sleeve 400 by multiple clamping components 211, which can limit the multiple degrees of freedom of the sleeve 400 in space, ensure that the sleeve 400 does not move during the clamping process, thereby improving the stability and reliability of the clamping. By adjusting the spacing and clamping force of the clamping components 211, the rotating clamping structure 200 can adapt to sleeves 400 of different diameters, thereby improving its versatility and adaptability. By providing a first rotating drive component 220 that cooperates with the circumferential limit of the clamping component 211, the first rotating drive component 220 can be used to drive multiple clamping components 211 to rotate, thereby driving the sleeve clamped by the clamping component 211 to rotate around its own axis.

[0039] Furthermore, the first rotation drive component 220 includes a core tube 221 and a rotation drive assembly 222. The core tube 221 is used to be sleeved on the outside of the sleeve and cooperate with the mounting bracket 100 to rotate axially around the sleeve 400; the tube wall of the core tube 221 is provided with a plurality of sliding holes 225, and the plurality of sliding holes 225 are arranged at intervals along the circumference of the core tube 221. The plurality of sliding holes 225 correspond to the plurality of clamping assemblies 211 one by one and are circumferentially limited with the clamping assemblies 211. The rotation drive assembly 222 is mounted on the mounting bracket 100 and connected to the core tube 221; the rotation drive assembly 222 drives the plurality of clamping assemblies 211 through the core tube 221 to drive the sleeve 400 to rotate.

[0040] In the present embodiment, the core tube 221 is sleeved on the outer side of the sleeve and cooperates with the mounting bracket 100 to rotate around the axial direction of the sleeve 400. This design makes the entire rotary drive component compact and occupies a small space, which is conducive to realizing efficient transmission in a limited space and improving the rotation stability and reliability of the sleeve 400. The rotary drive assembly 222 is directly mounted on the mounting bracket 100 and connected to the core tube 221. The core tube 221 drives multiple clamping assemblies 211 to drive the sleeve 400 to rotate. This direct drive method reduces the intermediate links in the transmission chain and improves the transmission efficiency. The tube wall of the core tube 221 is provided with multiple sliding holes 225, which are arranged at intervals along the circumference of the core tube 221 and correspond to multiple clamping assemblies 211 one by one. This design not only realizes the circumferential limit of the clamping assembly 211, but also ensures the stability of the clamping assembly 211 during the rotation process. Due to the circumferential limiting cooperation between the sliding hole 225 and the clamping assembly 211 , the clamping assembly 211 can maintain a relatively fixed position during the rotation process, thereby achieving stable clamping of the sleeve 400 .

[0041] Specifically, the mounting bracket 100 includes a first mounting sleeve 110; the first mounting sleeve 110 is sleeved on the outer side of the core tube 221 and is rotatably matched with the core tube 221 through a bearing. The first mounting sleeve 110 is also connected to a mounting plate 130, and the mounting plate 130 is slidably matched with a column 520 of a derrick 500 along the axial direction of the casing 400. When the driving structure 300 drives the rotating clamping structure 200 and the mounting bracket 100 to reciprocate along the axial direction of the casing 400, the mounting plate 130 is slidably matched with the column 520, which can improve the stability and reliability of the casing clamping device.

[0042] like Figure 3 and Figure 4As shown, further, the core tube 221 includes a tube body 223 and a gear tooth 224. The tube body 223 is sleeved on the outside of the sleeve and cooperates with the mounting bracket 100 to rotate around the axial direction of the sleeve 400. Along the circumference of the tube body 223, the gear tooth 224 is formed on the outside of the tube body 223, and the gear tooth 224 is meshed and connected with the rotation drive assembly 222. The meshing connection between the gear tooth 224 and the rotation drive assembly 222 can achieve efficient transmission, reduce energy loss, and improve transmission efficiency. Due to the accuracy of the gear transmission, the accurate control of the rotation angle and speed of the sleeve 400 can be achieved to meet the high-precision processing requirements. The design of the core tube 221 makes the entire first rotation drive component 220 more compact, reduces the occupied space, and is conducive to achieving efficient transmission and clamping in a limited space. The circumferential arrangement of the gear tooth 224 and the meshing connection with the rotation drive assembly 222 enhance the stability of the entire structure, making the sleeve 400 more stable during rotation, and reducing vibration and noise. By adjusting the number of teeth and the module of the gear teeth 224, it can adapt to sleeves of different diameters and materials, thereby improving the versatility and adaptability of the rotary clamping structure 200. The design of the gear teeth 224 makes the structure of the rotary drive component simpler and easier to maintain.

[0043] Furthermore, the rotary drive assembly 222 includes a reducer.

[0044] In some other embodiments, the rotary clamping structure 200 includes a clamping jaw assembly and a second rotary drive component; the clamping jaw assembly includes two clamping jaws and a clamping jaw drive component, the two clamping jaws are hinged, and the clamping jaw drive component drives the two clamping jaws to close or expand. When the two clamping jaws are closed, a clamping jaw assembly with a receiving cavity in the middle is formed, and when the two clamping jaws are closed, the sleeve 400 is clamped; when the two clamping jaws are expanded, the sleeve 400 is released. The second rotary drive component is connected to the outer side of the clamping jaw assembly, and is used to drive the sleeve to rotate around its own axis through the clamping jaw assembly.

[0045] Furthermore, the second rotation driving component is meshedly connected with the clamping jaw assembly via a gear set to drive the clamping jaw assembly to rotate around the axial direction of the sleeve 400 .

[0046] In some embodiments, the clamping component 210 further includes a clamping drive assembly 212 ; the clamping drive assembly 212 is connected to the plurality of clamping assemblies 211 ; the clamping drive assembly 212 is used to press the clamping assembly 211 toward the sleeve 400 , so that the plurality of clamping assemblies 211 clamp the sleeve 400 .

[0047] In this embodiment, the clamping force of the clamping assembly 211 on the sleeve 400 can be accurately controlled by the clamping drive assembly 212. By adjusting the output force of the clamping drive assembly 212, the clamping force can be accurately adjusted to ensure that the sleeve 400 will neither fall off due to insufficient clamping force nor be damaged due to excessive clamping force during the clamping process. The coordinated work of the clamping drive assembly 212 and the multiple clamping assemblies 211 makes the clamping process more stable and reliable. Multiple clamping assemblies 211 clamp the sleeve 400 at the same time, which can disperse the clamping force and reduce the deformation of the sleeve 400 during the clamping process, thereby improving the stability and reliability of the clamping.

[0048] In addition, the clamping drive assembly 212 can also be connected to an automated control system to achieve remote control and programmable control, which makes the entire clamping process more intelligent and automated, and reduces the complexity and risk of manual operation.

[0049] like Figures 3 to 6 As shown, further, a side of the clamping assembly 211 away from the sleeve 400 is an inclined surface 2113; the clamping drive assembly 212 includes a first connecting member 2121, a second connecting member 2122 and a clamping drive member 2123. Among them, one end of the first connecting member 2121 is hinged to the mounting bracket 100, and the other end is hinged to the clamping assembly 211. In the up-down direction, the second connecting member 2122 is provided with a slide groove 2124 on one side facing the clamping assembly 211, and the bottom of the slide groove 2124 contacts the inclined surface 2113. One end of the clamping drive member 2123 is hinged to the mounting bracket 100, and the other end is hinged to the second connecting member 2122, which is used to drive the second connecting member 2122 to slide and cooperate with the clamping assembly 211 along the up-down direction to press the clamping assembly 211 toward the sleeve 400.

[0050] In this embodiment, the design of the inclined surface 2113 enables the clamping assembly 211 to gradually approach the sleeve 400 along the inclined surface 2113 when receiving the driving force of the clamping driving member 2123, thereby realizing effective transmission of the clamping force. This design avoids the sudden increase or decrease of the clamping force during the transmission process, and ensures the stability and uniformity of the clamping force. The bottom of the groove 2124 contacts the inclined surface 2113, and this design ensures the stability and reliability of the clamping assembly 211 during the movement. The inclined surface 2113 can guide the clamping assembly 211 to move along a predetermined path, avoiding the shaking or deviation of the clamping assembly 211 during the movement. The first connecting member 2121 and the second connecting member 2122 are respectively hinged to the mounting bracket 100 and the clamping assembly 211. This connection mode allows the clamping assembly 211 to maintain a certain flexibility during the clamping process to adapt to the shape and size changes of the sleeve 400. At the same time, the hinged connection can also reduce friction and wear during the clamping process and extend the service life of the clamping assembly 211.

[0051] Specifically, the clamping assembly 211 slides with the sliding hole 225 in the up-down direction. The design of the sliding hole 225 can provide the clamping assembly 211 with an up-down displacement, ensuring that the clamping assembly 211 can move up and down under the action of the clamping drive 2123 to clamp or release the sleeve 400.

[0052] Preferably, the clamping drive member 2123 may be a tensioning cylinder, an electric push rod or a pneumatic cylinder.

[0053] Exemplarily, there may be multiple second connecting members 2122, and the clamping drive member 2123 may drive multiple second connecting members 2122 to move up and down synchronously, ensuring that the clamping assembly 211 applies the same force to the sleeve 400, thereby avoiding deformation of the sleeve 400 during the clamping process.

[0054] like Figure 6 As shown, exemplarily, the second connecting member 2122 includes a ring 2125; the ring 2125 is sleeved on the outer side of the clamping assembly 211, and is circumferentially limited with the clamping assembly 211; the inner side surface of the ring 2125 is provided with a plurality of slide grooves 2124, and the plurality of slide grooves 2124 are arranged at intervals along the circumference of the ring 2125, and the plurality of slide grooves 2124 correspond one-to-one to the plurality of clamping assemblies 211.

[0055] In this embodiment, the circumferential limit fit between the collar 2125 and the clamping assembly 211 ensures that the clamping assembly 211 will not move or deflect in the circumferential direction when clamping the sleeve 400. This stability is essential for maintaining a uniform distribution of the clamping force and preventing the sleeve 400 from being damaged during the clamping process. The design of the collar 2125 increases the overall rigidity of the clamping system, so that the clamping assembly 211 can better resist deformation when subjected to external forces, thereby maintaining the stability and reliability of the clamping force. The multiple chute 2124 on the inner side of the collar 2125 corresponds one-to-one to the multiple clamping assemblies 211. This design enables the clamping assembly 211 to move along the track of the chute 2124 during movement, thereby avoiding the deviation or shaking of the clamping assembly 211. The guiding effect of the chute 2124 enhances the stability and reliability of the clamping process. Since the chute 2124 corresponds one-to-one to the clamping assembly 211, multiple clamping assemblies 211 can act on the sleeve 400 at the same time, achieving a uniform distribution of the clamping force. This evenly distributed clamping force helps to reduce deformation and damage of the sleeve 400 during the clamping process.

[0056] Preferably, the collar 2125 is a conical collar. Along the direction from top to bottom, the diameter of the conical collar gradually decreases.

[0057] Preferably, there may be a plurality of clamping driving members 2123 , and the plurality of clamping driving members 2123 are arranged at intervals along the circumference of the collar 2125 , which can improve the stability of the up and down movement of the collar 2125 .

[0058] like Figure 3 and Figure 4 As shown, preferably, the mounting bracket 100 further includes a second mounting sleeve 120; the second mounting sleeve 120 is sleeved on the outer side of the core tube 221, and is rotatably matched with the core tube 221 through a bearing, and the lower side of the collar 2125 abuts against or separates from the upper side of the second mounting sleeve 120. When the clamping driving member 2123 drives the collar 2125 to move upward to press the clamping assembly 211 against the sleeve, the lower side of the collar 2125 separates from the upper side of the second mounting sleeve 120. When the clamping driving member 2123 drives the collar 2125 to move downward, the squeezing force of the collar 2125 on the clamping assembly 211 gradually decreases, and when the lower side of the collar 2125 abuts against the upper side of the second mounting sleeve 120, the clamping assembly 211 releases the sleeve.

[0059] like Figure 4 , Figures 7 to 9 As shown, in some embodiments, the clamping assembly 211 includes a first clamping member 2111 and a second clamping member 2112. The first clamping member 2111 is connected to the mounting bracket 100. The second clamping member 2112 is installed on a side of the first clamping member 2111 facing the sleeve 400 and is detachably connected to the first clamping member 2111.

[0060] In this embodiment, the clamping assembly 211 can clamp sleeves of different diameters by providing a second clamping member 2112 detachably connected to the first clamping member 2111. For example, when a sleeve with a large diameter needs to be clamped, the second clamping member 2112 is detached from the first clamping member 2111. When a sleeve with a small diameter needs to be clamped, the second clamping member 2112 can be connected to the first clamping member 2111.

[0061] Specifically, the side of the first clamping member 2111 away from the sleeve 400 is an inclined surface 2113 , the first clamping member 2111 is located in the slide groove 2124 of the second connecting member 2122 , the inclined surface 2113 contacts the bottom of the slide groove 2124 , and the second connecting member 2122 can slide along the slide groove 2124 .

[0062] Further, the clamping assembly 211 also includes a circumferential limiter and / or an axial limiter; the first clamping member 2111 is connected to the second clamping member 2112 by a circumferential limiter. The first clamping member 2111 is connected to the second clamping member 2112 by an axial limiter. In this embodiment, by setting the circumferential limiter, the circumferential limiter can ensure that the relative position of the first clamping member 2111 and the second clamping member 2112 in the circumferential direction (i.e., the direction around the axis of the sleeve 400) is stable. This helps to prevent the clamping assembly 211 from circumferentially offset when rotating or under force, thereby ensuring the accuracy and reliability of clamping. The axial limiter can ensure that the relative position of the clamping assembly 211 in the axial direction (i.e., along the axis of the sleeve 400) is stable. This helps to prevent the clamping assembly 211 from axially moving when under force, thereby ensuring the firmness and safety of clamping. Through the precise design and manufacture of the circumferential limiter, it can be ensured that the clamping assembly 211 achieves higher precision when clamping the sleeve 400. This helps to reduce errors and deviations caused by inaccurate clamping and improve product quality and consistency. By setting the axial limiter, the clamping strength of the clamping assembly 211 on the sleeve 400 can be further enhanced. This helps to resist the influence of external forces or vibrations on the clamping assembly 211 and ensure the stability and reliability of clamping. The combined use of the circumferential limiter and the axial limiter can significantly improve the overall performance of the clamping assembly 211. This includes improving clamping accuracy, enhancing stability, optimizing structural layout and other aspects.

[0063] Exemplarily, the circumferential limiting member includes a first groove 2116 and a first protrusion 2117; the first protrusion 2117 is assembled in the first groove 2116 in a direction perpendicular to the outer side of the sleeve, and is limited along the circumference of the sleeve with the second groove 2118. One of the first groove 2116 or the first protrusion 2117 is formed on a side of the first clamping member 2111 facing the sleeve, and the other is formed on a side of the second clamping member 2112 away from the sleeve. Through the cooperation of the groove and the protrusion, the structure is simple and easy to assemble.

[0064] Exemplarily, the axial stopper includes a second groove 2118 and a second protrusion 2119; the second protrusion 2119 is assembled in the second groove 2118 in a direction perpendicular to the outer side of the sleeve, and the second protrusion 2119 cooperates with the second groove 2118 in the axial direction of the sleeve. One of the second groove 2118 or the second protrusion 2119 is formed on a side of the first clamping member 2111 facing the sleeve, and the other is formed on a side of the second clamping member 2112 away from the sleeve. Through the cooperation of the groove and the protrusion, the structure is simple and easy to assemble.

[0065] Specifically, the first clamping member 2111 and the second clamping member 2112 are assembled by screw threads. By providing the circumferential limiter and the axial limiter, the number of screws used can be reduced.

[0066] Specifically, a mounting groove is provided on a side of the second clamping member 2112 facing the sleeve, and an abutting portion 2114 is installed in the mounting groove. The abutting portion 2114 is installed in the mounting groove and is detachably connected to the second clamping member 2112. The abutting portion 2114 abuts against the outer side of the sleeve on a side facing the sleeve. By providing the abutting portion 2114, the number of times the second clamping member 2112 needs to be replaced can be reduced by replacing the abutting portion 2114, thereby reducing costs.

[0067] Preferably, the side of the abutting portion 2114 facing the sleeve has a rough area, and the rough area abuts against the outer side surface of the sleeve.

[0068] In some embodiments, the driving structure 300 includes a lifting cylinder. The lifting cylinder is connected to the mounting bracket 100, and the lower end of the lifting cylinder is detachably connected to the orifice plate 510 of the derrick. When the casing clamping device is not needed, the lifting cylinder can be removed from the orifice plate 510.

[0069] A specific embodiment of the second aspect of the present invention provides a drilling device, which includes a casing clamping device according to any of the above embodiments.

[0070] The drilling equipment of this embodiment includes the casing clamping device of any of the above embodiments, and therefore has at least the above advantages, which will not be described in detail here.

[0071] Furthermore, the drilling equipment includes a derrick 500; the column 520 of the derrick 500 is slidably matched with the mounting bracket 100 along the axial direction of the casing 400, further improving the upward and downward movement stability of the casing clamping device. The driving end of the driving structure 300 is detachably connected to the orifice plate 510 of the derrick 500, ensuring that the casing 400 operation and the drilling operation can be carried out simultaneously, and the driving structure 300 can be connected to the orifice plate 510 according to actual needs, thereby expanding the scope of use.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A casing clamping device, characterized in that: include: Mounting bracket (100); a rotating clamping structure (200) mounted on the mounting bracket (100); the rotating clamping structure (200) is used to clamp or loosen the sleeve (400); when clamping the sleeve (400), the rotating clamping structure (200) is also used to drive the sleeve (400) to rotate around its own axis; A driving structure (300) is mounted on the mounting bracket (100), the driving structure (300) being used for being detachably connected to the derrick (500) and for driving the rotating clamping structure (200) through the mounting bracket (100), thereby driving the casing (400) to reciprocate along its own axial direction.

2. The casing clamping device according to claim 1, characterized in that: The rotating clamping structure (200) comprises: A clamping component (210) comprising a plurality of clamping assemblies (211); the clamping assemblies (211) are connected to the mounting bracket (100); the plurality of clamping assemblies (211) are arranged at intervals along the circumference of the sleeve (400), and the plurality of clamping assemblies (211) are used to clamp or loosen the sleeve (400); A first rotational drive component (220) is mounted on the mounting bracket (100); the first rotational drive component (220) is circumferentially limitedly matched with the clamping assembly (211), and the first rotational drive component (220) is used to drive the sleeve (400) to rotate around its own axis through a plurality of the clamping assemblies (211).

3. The casing clamping device according to claim 2, characterized in that: The first rotation driving component (220) comprises: The core tube (221) is used for being sleeved on the outer side of the sleeve (400) and cooperating with the mounting bracket (100) to rotate axially around the sleeve (400); a plurality of sliding holes (225) are provided on the tube wall of the core tube (221); the plurality of sliding holes (225) are arranged at intervals along the circumference of the core tube (221); the plurality of sliding holes (225) correspond to the plurality of clamping assemblies (211) one by one, and are circumferentially limited with the clamping assemblies (211); A rotation drive assembly (222) is mounted on the mounting bracket (100) and connected to the core tube (221); the rotation drive assembly (222) drives the plurality of clamping assemblies (211) through the core tube (221) to drive the sleeve (400) to rotate.

4. The casing clamping device according to claim 3, characterized in that: The core tube (221) comprises: A tube body (223) is sleeved on the outside of the sleeve (400) and cooperates with the mounting bracket (100) to rotate around the axial direction of the sleeve (400); Gear teeth (224) are formed on the outside of the tube body (223) along the circumference of the tube body (223), and the gear teeth (224) are meshingly connected with the rotation drive assembly (222).

5. The casing clamping device according to claim 2, characterized in that: The clamping component (210) further comprises: A clamping drive assembly (212) is connected to the plurality of clamping assemblies (211); the clamping drive assembly (212) is used to press the clamping assembly (211) toward the sleeve (400), so that the plurality of clamping assemblies (211) clamp the sleeve (400).

6. The casing clamping device according to claim 5, characterized in that: A side surface of the clamping assembly (211) away from the sleeve (400) is an inclined surface (2113); the clamping drive assembly (212) comprises: a first connecting member (2121), one end of the first connecting member (2121) being hinged to the mounting bracket (100), and the other end of the first connecting member (2121) being hinged to the clamping assembly (211); A second connecting member (2122), wherein a sliding groove (2124) is provided on a side of the second connecting member (2122) facing the clamping assembly (211) in the up-down direction, and a bottom of the sliding groove (2124) contacts the inclined surface (2113); A clamping drive member (2123), one end of the clamping drive member (2123) being hinged to the mounting bracket (100), and the other end of the clamping drive member (2123) being hinged to the second connecting member (2122), and being used for driving the second connecting member (2122) to slide and cooperate with the clamping assembly (211) along the up-down direction, so as to press the clamping assembly (211) toward the sleeve (400).

7. The casing clamping device according to claim 6, characterized in that: The second connecting member (2122) comprises: The collar (2125) is sleeved on the outer side of the clamping assembly (211) and cooperates with the clamping assembly (211) in a circumferential limiting manner; the inner side surface of the collar (2125) is provided with a plurality of slide grooves (2124), the plurality of slide grooves (2124) are arranged at intervals along the circumference of the collar (2125), and the plurality of slide grooves (2124) correspond one-to-one to the plurality of clamping assemblies (211).

8. The casing clamping device according to any one of claims 2 to 7, characterized in that: The clamping assembly (211) comprises: A first clamping member (2111) connected to the mounting bracket (100); A second clamping member (2112), the second clamping member (2112) is mounted on a side of the first clamping member (2111) facing the sleeve (400), and is detachably connected to the first clamping member (2111).

9. The casing clamping device according to claim 8, characterized in that: The clamping assembly (211) further comprises: A circumferential limiting member, wherein the first clamping member (2111) and the second clamping member (2112) are connected via the circumferential limiting member; or / and; An axial limiter, wherein the first clamping member (2111) and the second clamping member (2112) are connected via the axial limiter.

10. A drilling equipment, characterized in that: A casing clamping device comprising the casing clamping device according to any one of claims 1 to 9.

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