A wellhead platform for oilfield operations

Abstract

The present application relates to the technical field of oil field, and particularly relates to a wellhead platform for oil field operation, which comprises a platform body and a support, wherein the platform body is connected with the support, the platform body is provided with a slip centering device, the support is provided with a wellhead centralizing device, an integrated tong and a driving assembly, the integrated tong is located at the rear side of the wellhead centralizing device, the driving assembly is used for driving the wellhead centralizing device and the integrated tong to move forward and backward, the wellhead centralizing device is used for further centralizing the oil pipe and comprises a preliminary positioning mechanism and a precise positioning mechanism, the preliminary positioning mechanism is located directly above the precise positioning mechanism and is used for preliminarily centralizing the oil pipe, and the precise positioning mechanism is used for precisely centralizing the oil pipe. The present application has high overall structural integration, is easy to manufacture, reduces the production cost of equipment, and improves the work efficiency; the wellhead centralizing device is used for further precisely centralizing the oil pipe, so that the oil pipe is concentric with the wellhead, and the position of the oil pipe and the wellhead is successfully connected and the action of loading and unloading the oil pipe is ensured.

Description

Technical Field

[0001] This invention relates to the field of oilfield technology, and more specifically to a wellhead platform for oilfield operations. Background Technology

[0002] Wellhead platforms are crucial equipment in oilfield operations, used for tubing tripping and well workover. During tubing tripping, the tubing is typically lowered into the well close to the casing wall. For connection / unconnection, the tubing is first centered, secured with slips, and then driven by hydraulic wrenches to achieve the connection / unconnection action. However, existing wellhead platforms usually have their wrenches mounted on separate transport equipment, requiring them to be moved to the wellhead, which is inconvenient and increases equipment costs. Poor tubing centering also hinders connection / unconnection, severely impacting the timeliness of tubing tripping. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and to propose a wellhead platform for oilfield operations. The equipment structure is further optimized to make operation more convenient. At the same time, it can improve the centering effect of the tubing, so as to facilitate the uncoupling and reconnecting of the tubing and improve the efficiency of tubing tripping.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] An oilfield wellhead platform includes a platform body and a support; the platform body is connected to the support; the platform body is equipped with a slip centering device for centering the tubing or sucker rod; the support is equipped with a wellhead straightening device, an integrated clamp, and a drive assembly; the integrated clamp is located behind the wellhead straightening device and is used to perform the coupling and uncoupling actions; the drive assembly is used to drive the wellhead straightening device and the integrated clamp to move back and forth; the wellhead straightening device is used for further straightening the tubing, including a preliminary positioning mechanism and a precision positioning mechanism, the preliminary positioning mechanism being located directly above the precision positioning mechanism for preliminary straightening of the tubing or sucker rod, and the precision positioning mechanism for precise straightening of the tubing or sucker rod. The above technical solution directly connects the platform body, which is equipped with an integrated clamp and a wellhead straightening device, to the support. The integrated clamp and the wellhead straightening device are driven to move back and forth through a drive component, making the operation simpler and the integration higher. The preliminary positioning mechanism and the precision positioning mechanism further straighten the tubing, making the tubing concentric with the wellhead, ensuring smooth docking of the tubing with the wellhead and the tubing uncoupling and uncoupling operations, thus improving the efficiency of tubing tripping.

[0006] Furthermore, the preliminary positioning mechanism includes two sets of axisymmetrically arranged straightening plates. The straightening plates are connected to straightening cylinders, which are mounted on a support. The straightening cylinders drive the corresponding straightening plates, causing the two sets of straightening plates to move towards each other, thus achieving preliminary straightening of the oil pipe. The precise positioning mechanism includes two sets of axisymmetrically arranged straightening housings. An anti-splash housing is provided on the outside of the straightening housing. Both the straightening housing and the anti-splash housing are connected to an anti-splash cylinder, which is mounted on a support. On the one hand, during the oil pipe fastening operation, the anti-splash cylinder drives the corresponding straightening housing, causing the two sets of straightening housings to move towards each other, thus achieving precise straightening of the oil pipe. On the other hand, during the oil pipe unfastening operation, the anti-splash housing, driven by the anti-splash cylinder, is placed at the bottom of the oil pipe (the oil pipe located above the anti-splash housing), causing the liquid in the oil pipe to spray to the inside of the straightening housing. The straightening housing is used to reduce the liquid splash range and has the function of preventing liquid from splashing outward.

[0007] Furthermore, a sucker rod straightening plate is detachably connected to the top of the straightening housing, and a V-groove is provided on the inner side of the sucker rod straightening plate. The sucker rod straightening plate of this invention allows for the straightening of sucker rods with small outer diameters without replacing the straightening housing.

[0008] Furthermore, the splash-proof housing has a semi-cylindrical lower section and a semi-truncated spherical upper section. The inner diameter of the bottom of the semi-truncated spherical is smaller than the inner diameter of the top of the semi-truncated spherical, and equal to the inner diameter of the semi-cylindrical section. This structural design provides better splash protection and avoids affecting the installation of the sucker rod centering plate.

[0009] Furthermore, the slip centering device includes slip centering assemblies symmetrically arranged about the wellhead. Each slip centering assembly includes a slip centering cylinder, a slide block, a top shaft, and rollers. The piston rod of the slip centering cylinder is connected to the slide block, the bottom of the slide block is slidably disposed with the platform body, and the end is connected to the top shaft. Rollers are mounted on the side of the top shaft facing the tubing via roller fixing sleeves, and the side of the top shaft facing the tubing has a V-shaped structure. Activating the slip centering cylinder drives the top shaft forward, centering the tubing.

[0010] Furthermore, the support structure includes an upper support, a middle support, and a lower support; the upper support and the middle support, as well as the middle support and the lower support, are connected by slide rails; the drive assembly includes a motor, gears, and racks; the motor is fixed to the middle support, and a gear is provided at the output end of the motor; racks meshing with the gears are provided at the bottom of the upper support and the top of the lower support; the integrated clamp is mounted on the upper support. During operation, when the motor is started, the middle support moves horizontally relative to the lower support, and the upper support moves in the same direction at twice the speed of the middle support, causing the integrated clamp on the upper support to move rapidly.

[0011] Furthermore, the integrated clamp includes a pipe clamp body, which comprises a main clamp and a back clamp connected vertically. Both the main clamp and the back clamp are equipped with jaws. The main clamp includes a fixed portion and a rotating portion located within the fixed portion. A pair of jaw plates are mounted on the rotating portion, located at the jaws. Clamping blocks are detachably connected to the jaw plates for gripping the tubing or sucker rod. The back clamp includes a fixed portion and a rotating portion located within the fixed portion. A pair of jaw blocks are mounted on the rotating portion, located at the jaws. Jaw blocks are detachably connected to the jaw blocks for gripping the coupling. This technical solution grips the tubing or sucker rod using the jaw plates and clamping blocks, and grips the coupling using the jaw blocks and clamping blocks. The rotating portion can drive the jaw plates to rotate, thereby rotating the tubing or sucker rod to achieve the locking or unlocking action. The rotating portion can drive the jaw blocks to rotate, thereby rotating the coupling to achieve the installation and removal of the coupling. When clamping sucker rods and tubing of different diameters, only the clamping blocks and teeth need to be replaced. There is no need to set up two sets of equipment. The same set of equipment can be used for both sucker rods and tubing, which greatly saves costs.

[0012] Furthermore, the main clamp is mounted on the spring top plate via a suspension arm, with each end of the spring top plate passing through two guide shafts. A buffer spring is provided between the spring top plate and the bottom of the guide shafts. The tops of the two guide shafts are fixed to the mounting base, which is connected to a lifting cylinder fixed on the upper support. This structure not only allows the integrated clamp to be mounted on the upper support but also ensures smooth fastening or unfastening of the sucker pipe or sucker rod. At the same time, it guides the up-and-down movement of the main clamp.

[0013] Furthermore, a clamping guide block is fixedly installed at the bottom of the back clamp, and a clamping block is slidably installed on the clamping guide block. A slot is opened at the center of the clamping block, and the size of the slot is graded to clamp oil tubing or sucker rod of different sizes.

[0014] Furthermore, the side of the clamping block facing away from the bayonet is connected to a baffle fixed on the clamping guide block of the coupling via a spring. Under the push of the spring, the clamping block is pushed towards the coupling to achieve the purpose of clamping oil pipes or sucker rods of different sizes.

[0015] Technical effects of the present invention:

[0016] Compared with the prior art, the wellhead platform for oilfield operations of the present invention has a high degree of overall structural integration, is easy to manufacture, reduces equipment production costs, and improves work efficiency; by using a wellhead straightening device to further and precisely straighten the tubing, the tubing is made concentric with the wellhead, ensuring smooth connection between the tubing and the wellhead and the tubing uncoupling and reconnection actions, thereby improving the efficiency of tubing tripping. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the wellhead platform structure for oilfield operations according to the present invention;

[0018] Figure 2 This is a front view of the wellhead platform for oilfield operations according to the present invention;

[0019] Figure 3 This is a left view of the wellhead platform for oilfield operations according to the present invention;

[0020] Figure 4 This is a schematic diagram of the centering device of the present invention.

[0021] Figure 5 This is a schematic diagram of the support, wellhead straightening device, and integrated clamp structure of the present invention;

[0022] Figure 6 This is a schematic diagram of the middle and lower support structures of the present invention;

[0023] Figure 7 This is a schematic diagram of the integrated clamp structure of the present invention;

[0024] Figure 8 This is a front view of the integrated clamp of the present invention;

[0025] Figure 9 This is a right view of the integrated clamp of the present invention;

[0026] Figure 10 This is a schematic diagram of the rotating part and rotating section structure of the present invention;

[0027] Figure 11 This is a schematic diagram of the coupling clamping guide block, clamping block, spring and baffle structure of the present invention;

[0028] Figure 12 This is a schematic diagram of the jaw plate and clamping block structure of the present invention;

[0029] Figure 13 This is a schematic diagram of the tooth block clamping block and tooth block structure of the present invention;

[0030] Figure 14 This is a schematic diagram of the wellhead straightening device of the present invention;

[0031] Figure 15 This is a schematic diagram of the straightening plate, straightening cylinder, and straightening swing arm structure of the present invention;

[0032] Figure 16 This is a schematic diagram of the anti-splash housing and sucker rod straightening plate structure of the present invention.

[0033] In the diagram, A is the platform body; B is the support frame; C is the slip alignment device; D is the wellhead straightening device; E is the integrated clamp; F is the drive assembly; C1 is the slip alignment cylinder; C2 is the slide; C3 is the top shaft; C4 is the roller; C5 is the roller fixing sleeve; D1 is the preliminary positioning mechanism; D2 is the precision positioning mechanism; 1 is the main clamp; 2 is the back clamp; 3 is the jaw plate; 4 is the clamping block; 5 is the jaw block clamping block; 6 is the jaw block; 7 is the coupling clamping guide block; 8 is the clamping block; 9 is the bayonet; 10 is the spring; 11 is the baffle; 12 is the telescopic rod; 13 is the motor one; 14 is the motor two; 15 is the jaw plate frame; 16 is the gear disc one; 17 is the clamping block frame; 18 is the gear disc two; 19 is the suspension arm; 20 is the upper support; 21 is the middle support; 22 is the lower support; 23 is the... 24. Motor; 25. Gear; 26. Rack; 27. Spring top plate; 28. Guide shaft one; 29. ​​Buffer spring; 30. Mounting base; 31. Lifting cylinder; 32. Pipe wrench anti-tail swing support slide plate; 33. Pipe wrench anti-tail swing support; 34. Slide rail; 35. Straightening cylinder seat; 36. Straightening plate; 37. Straightening cylinder; 38. Anti-spray cylinder; 39. Anti-spray housing; 40. Sucker rod straightening plate; 41. V-groove one; 42. Strip groove; 43. Guide shaft two; 44. Straightening swing arm; 45. V-groove two; 101. Fixed part; 102. Rotating part; 201. Fixed part; 202. Rotating part; 301. Slotted; 121. Inner rod; 122. Outer rod; 391. Semi-cylinder; 392. Semi-circular frustum. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0035] Example 1:

[0036] like Figure 1As shown in the figure, this embodiment relates to a wellhead platform for oilfield operations, including a platform body A and a support B; the platform body A is connected to the support B; the platform body A is equipped with a slip centering device C for centering the tubing or sucker rod; the support B is equipped with a wellhead straightening device D, an integrated clamp E, and a drive assembly F; the integrated clamp E is located behind the wellhead straightening device D and is used to perform the coupling and uncoupling actions; the wellhead straightening device D is used to further straighten the tubing; the drive assembly F is used to drive the wellhead straightening device D and the integrated clamp E to move back and forth. This embodiment directly connects the platform body A, which is equipped with the integrated clamp E and the wellhead straightening device D, to the support B, and drives the integrated clamp E and the wellhead straightening device D to move back and forth through the drive assembly F, making the operation simpler and the integration higher; the wellhead straightening device D further precisely straightens the tubing, making the tubing concentric with the wellhead, ensuring smooth docking of the tubing with the wellhead and the coupling and uncoupling actions of the tubing, thus improving the efficiency of tubing tripping.

[0037] like Figure 1-3 As shown, the support B includes an upper support 20, a middle support 21 and a lower support 22; the upper support 20 and the middle support 21, and the middle support 21 and the lower support 22 are connected by slide rails 33.

[0038] like Figure 1 , 2 As shown in Figure 6, the drive assembly F includes a motor 23, a gear 24, and a rack 25. The motor 23 is fixed to the middle support 21, and the output end of the motor 23 is provided with the gear 24. Racks 25 meshing with the gear 24 are provided at the bottom of the upper support 20 and the top of the lower support 22. The integrated clamp E is mounted on the upper support 20. During operation, when the motor 23 is started, the middle support 21 moves horizontally relative to the lower support 22, and the upper support 20 moves in the same direction at twice the speed of the middle support 21, causing the integrated clamp E on the upper support 20 to move rapidly.

[0039] like Figure 1 and 4 As shown, the slip centering device C includes slip centering assemblies symmetrically arranged about the wellhead. Each slip centering assembly includes a slip centering cylinder C1, a slide C2, a top shaft C3, and a roller C4. The piston rod of the slip centering cylinder C1 is connected to the slide C2. The bottom of the slide C2 is slidably disposed with respect to the platform body A, and its end is connected to the top shaft C3. The roller C4 is mounted on the side of the top shaft C3 facing the tubing via a roller fixing sleeve C5. The side of the top shaft C3 facing the tubing has a V-shaped structure. Activating the slip centering cylinder C1 drives the top shaft C3 forward, centering the tubing.

[0040] like Figure 2 , 3As shown in Figure 5, the integrated clamp E includes a pipe clamp body, which includes a main clamp 1 and a back clamp 2 that are connected vertically and horizontally. Both the main clamp 1 and the back clamp 2 are equipped with jaws. The main clamp 1 is also equipped with a suspension arm 19, which is mounted on a spring top plate 26. The two ends of the spring top plate 26 are respectively connected to two guide shafts 27. A buffer spring 28 is provided between the spring top plate 26 and the bottom of the guide shafts 27. The tops of the two guide shafts 27 are fixed to a mounting base 29, which is connected to a lifting cylinder 30 fixed on an upper support 20. This structure not only allows the integrated clamp E to be mounted on the upper support 20, but also ensures smooth hooking or unhooking of the sucker pipe or sucker rod. Simultaneously, it guides the vertical movement of the main clamp 1. One side of the main clamp 1 is connected to a pipe clamp anti-swing support 32 mounted on the upper support 20 via a pipe clamp anti-swing support slide plate 31, improving the stability of the integrated clamp E and providing guidance.

[0041] like Figure 7 and 8 As shown, the main clamp 1 includes a fixed part 101 and a rotating part 102 located within the fixed part 101. A pair of jaw plates 3 are provided on the rotating part 102, with the jaw plates 3 located at the jaws. Clamping blocks 4 are detachably connected to the jaw plates 3 for gripping the sucker tube or sucker rod. The rotating part 102 drives the jaw plates 3 to rotate, thereby driving the sucker tube or sucker rod to rotate.

[0042] like Figure 7 and 8 As shown, the back clamp 2 includes a fixing part 201 and a rotating part 202 located within the fixing part 201. A pair of jaw block clamping blocks 5 are provided on the rotating part 202, with the jaw block clamping blocks 5 located at the jaws. Jaw blocks 6 (such as...) are detachably connected to the jaw block clamping blocks 5. Figure 13 As shown), it is used to clamp the coupling. The rotating part 202 drives the toothed block 5 to rotate, thereby driving the coupling to rotate.

[0043] like Figure 7 and 11 As shown, a clamping guide block 7 is fixedly installed at the bottom of the back clamp 2. A clamping block 8 is slidably mounted on the clamping guide block 7. A slot 9 is opened at the center of the clamping block 8. The slot 9 is graded in size, such as two grades in this embodiment. The size of the slot 9 gradually narrows from the outside to the inside, which is used to clamp oil tubing or sucker rods of different sizes. Preferably, the side of the clamping block 8 away from the slot 9 is connected to a baffle 11 fixed on the clamping guide block 7 by a spring 10. Under the push of the spring 10, the clamping block 8 is pushed towards the clamping direction. The oil tubing with a larger diameter is clamped in the wider position of the slot 9, and the sucker rod with a smaller diameter is clamped in the narrower position of the slot 9.

[0044] like Figure 7 and9 As shown, the main clamp 1 and the back clamp 2 are connected by a telescopic rod 12. Specifically, the telescopic rod 12 includes an inner rod 121 and an outer rod 122. The inner rod 121 is sleeved inside the outer rod 122, and the bottom of the inner rod 121 is connected to the inner bottom wall of the outer rod 122 through a support spring (not shown in the figure), so as to realize the up and down floating of the main clamp 1 relative to the back clamp 2, ensuring the smooth operation of fastening and unfastening.

[0045] like Figure 9 and 10 As shown, the rotating part 102 of the main jaw 1 is driven to rotate by a motor 13 fixed to the main jaw 1, and the rotating part 202 of the back jaw 2 is driven to rotate by a motor 14 fixed to the back jaw 2. Specifically, the rotating part 102 includes a jaw plate frame 15, with a pair of jaw plates 3 oppositely arranged on the jaw plate frame 15. A gear disc 16 is arranged on the outer periphery of the jaw plate frame 15, which meshes with a rotating gear (not shown in the figure) at the output end of the motor 13, thereby driving the rotating part 102 by the motor 13. The rotating part 202 includes a clamping block frame 17, with a pair of jaw blocks 5 oppositely arranged on the clamping block frame 17. A gear disc 18 is arranged on the outer periphery of the clamping block frame 17, which meshes with a rotating gear (not shown in the figure) at the output end of the motor 14, thereby driving the rotating part 202 by the motor 14.

[0046] The clamping block 4 can be adjusted up and down on the jaw plate 3. As one embodiment, such as... Figure 12 As shown, a vertical slot 301 is formed at the bottom of the jaw plate 3. The clamping block 4 is fixed to the slot 301 by bolts. During installation, the position of the bolts in the slot 301 is adjusted and then tightened to achieve height adjustment and fixation of the clamping block 4. As another embodiment, several through holes can be formed in the vertical direction at the lower end of the jaw plate 3, and bolts can be placed in the through holes at different heights to achieve height adjustment and fixation of the clamping block 4.

[0047] The rotating part 102 of the main clamp 1 is equipped with a drive device (not shown in the figure) for driving the jaw plates 3 left and right. The jaw plates 3 can slide left and right relative to the jaw plate frame 15. The installation position of the drive device can drive the jaw plates 3 to move left and right, and can also rotate with the rotating part 102. The present invention does not limit its installation position. Under the drive of the drive device, the two jaw plates 3 move towards each other to better grip the sucker tube or sucker rod.

[0048] like Figure 14 As shown, the wellhead straightening device D is used to further straighten the tubing, including a preliminary positioning mechanism D1 and a precise positioning mechanism D2. Both the preliminary positioning mechanism D1 and the precise positioning mechanism D2 are set on the upper support 20. The preliminary positioning mechanism D1 is located directly above the precise positioning mechanism D2 and is used for the preliminary straightening of the tubing. The precise positioning mechanism D2 is used for the precise straightening of the tubing.

[0049] like Figure 14 and 15 As shown, the preliminary positioning mechanism D1 includes two sets of straightening cylinders 36 and two sets of axially symmetrical straightening plates 35. The straightening plates 35 are provided with V-shaped grooves 45 (but not limited to V-shaped grooves, they can also be arc-shaped grooves) to facilitate clamping the sucker tube or sucker rod. The straightening cylinders 36 are hydraulic cylinders and are mounted on the upper support 20 via straightening cylinder seats 34. The cylinder body of the straightening cylinder 36 is hinged to the straightening cylinder seat 34, and the piston rod of the straightening cylinder 36 is hinged to one side of the straightening swing arm 44. One end of the straightening swing arm 44 is hinged to the upper support 20, and the other end is fixedly mounted with the straightening plate 35. In use, the straightening cylinders 36 are activated, driving the straightening swing arm 44 to rotate, thereby driving the corresponding straightening plates 35, causing the two sets of straightening plates 35 to move towards each other, achieving preliminary straightening of the sucker tube or sucker rod.

[0050] like Figure 14 and 16 As shown, the precise positioning mechanism D2 includes two sets of axisymmetrically arranged straightening housings 37. A splash guard 39 is provided on the outside of the straightening housing 37. Both the straightening housing 37 and the splash guard 39 are connected to the blowout preventer 38. The blowout preventer 38 is a hydraulic cylinder and is mounted on the upper support 20. A sucker rod straightening plate 40 is detachably connected to the top of the straightening housing 37. A V-groove 41 (but not limited to a V-groove, it can also be an arc groove) is provided on the inner side of the sucker rod straightening plate 40. When it is necessary to straighten the sucker rod, the sucker rod straightening plate 40 can be installed on the top of the straightening housing 37 to be suitable for straightening sucker rods with small outer diameters. The sucker rod straightening plate 40 has a strip groove 42. The sucker rod straightening plate 40 is connected to the straightening housing 37 by bolts. The bolts are placed in the strip groove 42. The strip groove 42 allows the sucker rod straightening plate 40 to move back and forth along the length of the strip groove 42, making the adjustment more flexible and able to meet actual needs.

[0051] like Figure 16 As shown, the splash shield 39 has a lower semi-cylindrical body 391 and an upper semi-truncated cone 392. The inner diameter of the bottom of the semi-truncated cone 392 is smaller than the inner diameter of the top of the semi-truncated cone 392, and is equal to the inner diameter of the semi-cylindrical body 391. During the oil pipe uncoupling operation, the two sets of splash shields 39 are joined together, with the upper part forming a truncated cone and the lower part forming a cylinder. After uncoupling, the oil pipe located above the splash shield 39 sprays liquid into the splash shield 39, thus reducing the splash range.

[0052] like Figure 14As shown, the piston rod of the blowout preventer cylinder 38 is fixedly connected to the outer side of the splash-proof housing 39, and the centering housing 37 is bolted to the inner side of the splash-proof housing 39 for easy disassembly and maintenance. Guide shafts 43 are also provided on both sides of the blowout preventer cylinder 38. The guide shafts 43 pass through the upper support 20, with one end connected to the splash-proof housing 39. When the blowout preventer cylinder 38 drives the splash-proof housing 39 to move back and forth, the guide shafts 43 provide guidance and also make the splash-proof housing 39 more stable.

[0053] Working Principle: This invention directly connects the platform body A, equipped with an integrated clamp E and a wellhead centering device D, to the support B. During operation, the centering cylinder C1 is activated, driving the top shaft C3 forward to center the tubing or sucker rod. The integrated clamp E is suspended from the upper support 20 of the workover rig via the suspension arm 19. The wellhead centering device D is installed in front of the integrated clamp E. Both the integrated clamp E and the wellhead centering device D are suitable for both tubing and sucker rod. During operation, the motor 23 drives the middle support 21 to move horizontally relative to the lower support 22, while the upper support 20 moves towards the wellhead at twice the speed of the middle support 21. During the tubing re-coupling operation, the re-coupling cylinder 36 of the wellhead re-coupling device D drives the corresponding re-coupling plate 35, causing the two sets of re-coupling plates 35 to move towards each other, achieving initial re-coupling of the tubing. Then, the blowout preventer cylinder 38 drives the corresponding re-coupling housing 37, causing the two sets of re-coupling housings 37 to move towards each other, achieving precise re-coupling of the tubing. After precise re-coupling of the tubing, the integrated clamp E continues to move forward for the re-coupling operation. This embodiment, through the above two-stage re-coupling operation, ensures that the tubing and wellhead are concentric, allowing the re-coupling operation to proceed smoothly.

[0054] In this embodiment, the clamping block 8 of the integrated clamp E holds the sucker tube or sucker rod. During this process, the spring 10 pushes the clamping block 8 forward. For larger sucker tubes, the clamping block 8 is positioned at the larger opening of the jaw 9. For smaller sucker rods, the spring 10 continues to push the clamping block 8 forward, securing the sucker rod at the smaller opening of the jaw 9. After the sucker tube or sucker rod is held in place, the jaw blocks 6 on the jaw clamping block 5 clamp and secure the coupling. The clamping block 4 on the jaw plate 3 clamps and secures the upper sucker tube or sucker rod. Then, driven by the motor 13, the clamp rotates to perform the locking or unlocking action. When it is necessary to install or remove the coupling, the clamping block 8 holds the lower sucker tube or sucker rod, and the jaw blocks 6 on the jaw clamping block 5 clamp and secure the coupling. Driven by the motor 14, the coupling rotates, thereby achieving the installation or removal of the coupling.

[0055] In this embodiment, during the uncoupling operation of the sucker pipe or sucker rod, the blowout preventer cylinder 38 is activated. The blowout preventer cylinder 38 drives two sets of anti-splash housings 39 to dock. After docking, they are placed at the bottom of the oil pipe (the oil pipe located above the anti-splash housing 39). The liquid in the oil pipe is sprayed to the inside of the straightening housing 37, which reduces the liquid splash range and prevents the liquid from splashing outward.

[0056] This embodiment has a high degree of overall structural integration. The same set of equipment can be used for both sucker tubing and sucker rod, making it easy to manufacture, reducing equipment production costs, and improving work efficiency.

[0057] The above-described specific embodiments are merely specific examples of the present invention. The patent protection scope of the present invention includes, but is not limited to, the above-described specific embodiments. Any appropriate changes or modifications made by a person skilled in the art that conform to the claims of the present invention should fall within the patent protection scope of the present invention.

Claims

1. A wellhead platform for oilfield operations, comprising a platform body (A) and a support (B); characterized in that: The platform body (A) is connected with the support (B); the platform body (A) is provided with a slip centering device (C); the support (B) is provided with a well mouth centralizing device (D), an integrated tong (E) and a driving assembly (F); the integrated tong (E) is located at the rear side of the well mouth centralizing device (D); the driving assembly (F) is used for driving the well mouth centralizing device (D) and the integrated tong (E) to move forward and backward; the well mouth centralizing device (D) comprises a preliminary positioning mechanism (D1) and a precise positioning mechanism (D2), the preliminary positioning mechanism (D1) is located directly above the precise positioning mechanism (D2) and is used for preliminarily centralizing the sucker rod or the sucker rod string, and the precise positioning mechanism (D2) is used for precisely centralizing the sucker rod or the sucker rod string; The preliminary positioning mechanism (D1) comprises two groups of centralizing plates (35) which are symmetrically arranged on the axis, the centralizing plates (35) are connected with centralizing cylinders (36), the centralizing cylinders (36) are arranged on the support (B), the corresponding centralizing plates (35) are driven through the centralizing cylinders (36), and the two groups of centralizing plates (35) move towards each other; the precise positioning mechanism (D2) comprises two groups of centralizing housings (37) which are symmetrically arranged on the axis, the outer side of the centralizing housing (37) is provided with a splash-proof housing (39), and the centralizing housing (37) and the splash-proof housing (39) are connected with a splash-proof cylinder (38), the splash-proof cylinder (38) is arranged on the support (B); The top of the centralizing housing (37) is detachably connected with a sucker rod centralizing plate (40), and the inner side of the sucker rod centralizing plate (40) is provided with a V-shaped groove (41); The lower part of the splash-proof housing (39) is a half cylinder (391), the upper part is a half circular table body (392), the inner diameter of the bottom of the half circular table body (392) is smaller than the inner diameter of the top of the half circular table body (392), and is equal to the inner diameter of the half cylinder (391).

2. The wellhead platform for oilfield operations of claim 1, characterized in that: The slip centering device (C) comprises slip centering assemblies which are symmetrically arranged about the well mouth, each slip centering assembly comprises a slip centering oil cylinder (C1), a sliding seat (C2), a top shaft (C3) and a roller (C4); the piston rod of the slip centering oil cylinder (C1) is connected with the sliding seat (C2), the bottom of the sliding seat (C2) is slidably arranged on the platform body (A), the end part is connected with the top shaft (C3), and the side of the top shaft (C3) facing the oil pipe is provided with the roller (C4) through a roller fixing sleeve (C5).

3. The wellsite platform for oilfield operations of claim 1, characterized in that: The support (B) comprises an upper layer support (20), a middle layer support (21) and a lower layer support (22); the upper layer support (20) and the middle layer support (21) and the middle layer support (21) and the lower layer support (22) are connected through sliding rails (33); the driving assembly (F) comprises a motor (23), a gear (24) and a rack (25); the motor (23) is fixed on the middle layer support (21), the output end of the motor (23) is provided with the gear (24), and the bottom of the upper layer support (20) and the top of the lower layer support (22) are provided with the rack (25) which is engaged with the gear (24); the integrated tong (E) is arranged on the upper layer support (20).

4. The wellhead platform for oilfield operations according to any one of claims 1-3, characterized in that: The integrated tongs (E) comprise a pipe tong body, the pipe tong body comprises a main tong (1) and a back tong (2) which are connected in an up-down floating manner; the main tong (1) and the back tong (2) are both provided with a tong mouth; the main tong (1) comprises a fixed part (101) and a rotating part (102) located in the fixed part (101), a pair of jaw plates (3) are arranged on the rotating part (102), the jaw plates (3) are located at the tong mouth, and a clamping block (4) is detachably connected to the jaw plates (3) and used for tightly holding the oil extraction pipe or the oil extraction rod; the back tong (2) comprises a fixed part (201) and a rotating part (202) located in the fixed part (201), a pair of tooth block clamping blocks (5) are arranged on the rotating part (202), the tooth block clamping blocks (5) are located at the tong mouth, and a tooth block (6) is detachably connected to the tooth block clamping blocks (5) and used for tightly holding the coupling.

5. The wellsite platform for oilfield operations of claim 4, characterized in that: The main tong (1) is installed on a spring top plate (26) through a suspension arm (19), the spring top plate (26) penetrates through two guide shafts I (27) at both ends, and a buffer spring (28) is arranged between the spring top plate (26) and the bottom of the guide shaft I (27); the top of the two guide shafts I (27) is fixed on a mounting seat (29), and the mounting seat (29) is connected with a lifting oil cylinder (30) fixed on an upper support (20).

6. The wellsite platform for oilfield operations of claim 4, characterized in that: The back tong (2) is fixedly provided with a coupling clamping guide block (7) at the bottom, the coupling clamping guide block (7) is provided with a clamping square block (8) which slides forward and backward, a bayonet (9) is arranged at the center position of the clamping square block (8), and the size of the bayonet (9) is graded.

7. The wellsite platform for oilfield operations of claim 6, characterized in that: The side of the clamping square block (8) away from the bayonet (9) is connected with a baffle (11) fixed on the coupling clamping guide block (7) through a spring (10).

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