Pipe column pressurizing device for horizontal well

Abstract

The utility model relates to the technical field of well drilling and workover engineering, in particular to a tubular column pressurizing device for a horizontal well, which comprises a turntable beam and a lifting mechanism, the fixed end of the lifting mechanism is fixedly connected with the turntable beam, and the telescopic end of the lifting mechanism is connected with a walking beam. The telescopic end of the lifting mechanism can drive the walking beam to move up and down in the vertical direction; the walking beam is connected with the slip through a passive rotating device, and the passive rotating device can rotate relative to the walking beam. According to the pipe column pressurizing device for the horizontal well, the pipe column can be pressurized through the lifting mechanism, the dead weight of the pipe column is effectively supplemented, the pipe column jamming and hanging risks are remarkably reduced, the length of the horizontal section is increased, and the single well productivity can be improved.

Description

Technical Field

[0001] This utility model relates to the field of drilling and well workover engineering technology, and in particular to a tubing pressurization device for horizontal wells. Background Technology

[0002] In the development of unconventional oil and gas resources such as shale gas, horizontal wells are widely used because they can significantly improve the controlled reserves and recovery rate of a single well. However, in the drilling and completion of horizontal wells, especially in shallow shale gas wells, due to the shallow formation and long horizontal extension of the wellbore, a large water verticality often occurs. This well structure significantly increases the friction at the bottom of the well, leading to problems such as sticking and stagnation of the tubing string (casing, drill pipe, tubing, etc.) during downhole operation.

[0003] In traditional horizontal well drilling operations using drilling rigs and workover rigs, the tubing string is primarily lowered into the well by its own weight. However, in shallow horizontal well operations, due to the shallow depth and large water-to-water ratio, the horizontal section of the tubing string is much longer than the vertical section, resulting in insufficient downhole pressure. The tubing string's own weight alone is often insufficient to overcome downhole friction, especially in the later stages of tubing lowering. As the horizontal section length increases, friction continues to increase, making it difficult to lower the tubing string or even prevent it from reaching the designed well depth. This limits the length of the horizontal section and negatively impacts the gas production of a single shale gas well. To overcome this problem, field operations typically rely on increasing mud density, improving fluid lubrication, or using shoveling and vibration techniques to assist lowering the tubing. However, these methods have limited effectiveness, are complex to operate, and pose certain downhole safety risks. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing drilling rigs and workover rigs in horizontal well operations, such as insufficient pressure on the tubing string, difficulty in lowering the tubing string into the well, and limited length of the horizontal section, and to provide a tubing string pressurization device for horizontal wells.

[0005] In a first aspect, the present invention provides a tubing pressurization device for horizontal wells, comprising:

[0006] The turntable beam and the lifting mechanism are provided. The fixed end of the lifting mechanism is fixedly connected to the turntable beam, and the telescopic end of the lifting mechanism is connected to the walking beam. The telescopic end of the lifting mechanism can drive the walking beam to move up and down in the vertical direction.

[0007] The walking beam is connected to the slip via a passive rotating device, which is capable of rotating relative to the walking beam.

[0008] This utility model provides a tubing pressurization device for horizontal wells. During use, it can be installed on the base of a drilling rig or workover rig. The rotary beam is interchangeable with the rotary beam of the drilling rig or workover rig base, and the size and model of the rotary beam can be customized according to different drilling rig or workover rig models. After the tubing string operation is completed on the rotary table, the slip handle can be operated to open the slips. The passive rotation device between the slips and the walking beam rotates with the tubing string, providing rotational freedom for the slips during tubing string rotation. Operating the lifting mechanism handle causes the telescopic end of the lifting mechanism to extend upwards, driving the walking beam to rise for the entire stroke. Afterwards, the slip handle can be operated to close the slips and clamp the tubing string. Then, the telescopic end of the lifting mechanism retracts, cooperating with the drilling rig's top drive to slowly send the tubing string into the well, achieving the tubing string pressurization function.

[0009] The tubing pressurization device for horizontal wells provided by this utility model can pressurize the tubing through a lifting mechanism, effectively supplementing the tubing's own weight, significantly reducing tubing jamming and suspension risks, extending the length of the horizontal section, and helping to improve single-well productivity.

[0010] Preferably, the turntable beam comprises: two parallel longitudinal beams and two parallel transverse beams, wherein the longitudinal beams and the transverse beams are orthogonal.

[0011] With this structural design, the two longitudinal beams and two transverse beams form an orthogonal frame structure, which gives the turntable beam high stiffness and strength in the longitudinal, transverse and torsional directions. This effectively resists the complex loads from the wellhead equipment and the tubing during the running-in process, thus improving the structural reliability.

[0012] Preferably, both the longitudinal beam and the transverse beam are I-beams.

[0013] The I-beam has an I-shaped cross-section, which has advantages such as large moment of inertia, large modulus, high bending stiffness, and high strength. When subjected to complex loads generated during the lowering of the pipe column, it can maintain less deformation, thereby ensuring the stability of the device.

[0014] Preferably, the system further includes four flange plates located at the four corners of the frame formed by the longitudinal beams and the transverse beams, with the same flange plate simultaneously fixedly connected to the intersecting longitudinal beams and transverse beams; the system comprises four lifting mechanisms, with the fixed end of each lifting mechanism fixedly connected to the flange plate.

[0015] With this structural setup, the four lifting mechanisms are located at the four corners of the orthogonal frame formed by the two longitudinal beams and two transverse beams. The fixed ends of the lifting mechanisms are rigidly connected to the longitudinal and transverse beams through flange plates, ensuring the stability of the lifting mechanism connection. It is not necessary to occupy other space specifically for fixing the lifting mechanisms. The lifting mechanisms are "suspended" from the bottom of the turntable beam through the flange plates, saving space and making them more suitable for the cramped space of the workover rig or drilling rig base.

[0016] The flange plates are fixedly connected to the longitudinal and transverse beams at the intersections (e.g., by welding or bolting) to form rigid triangular support units, which improves the local and planar stiffness of the frame. The lifting mechanism transmits the force directly to the turntable beam through the flange plates. Under the condition of simultaneous force at four points, the connection nodes between beams are less prone to shear slip or local buckling, ensuring that the entire frame remains stable during the pressurization process.

[0017] Preferably, it also includes a dummy turntable, which is mounted on top of the turntable beam.

[0018] With this structural design, the shape and interface size of the dummy rotary table can be consistent with the original rotary table of the drilling rig or workover rig base. After being installed on site, only the original rotary table needs to be removed and the dummy rotary table fixed to the base. There is no need to make too many modifications to the drilling rig base, which greatly shortens the installation time and reduces the modification risk. The dummy rotary table can fit tightly with the original rotary table position of the drilling rig or workover rig base, avoiding local stress concentration or tilting during construction, and ensuring that the entire pressurizing device and the drilling rig or workover rig base form an integrated force-bearing structure.

[0019] Preferably, it also includes a dummy turntable filler core, which is located inside the dummy turntable. The dummy turntable filler core, the dummy turntable, the passive rotation device, and the slip are all concentrically arranged, and the dummy turntable filler core is connected to the walking beam.

[0020] With this structural setup, tubing of different diameters can be equipped with dummy rotary cores of corresponding aperture sizes to ensure that the tubing is always in a concentric position within the dummy rotary core, avoiding torque shift and uneven friction caused by eccentricity. The aperture size of the dummy rotary core can be customized or changed according to the outer diameter of the tubing used on site. There is no need to replace the entire dummy rotary core; simply disassemble and replace the dummy rotary core to quickly adapt to tubing of different diameters.

[0021] Preferably, the dummy turntable has a stepped portion inside, which is used to support the dummy turntable core, and the dummy turntable core is movably connected to the walking beam in the vertical direction.

[0022] With this structural design, the stepped section supports the dummy turntable core. When the walking beam and the dummy turntable core fall back in the lifting mechanism, the axial load of the pipe column is transferred to the dummy turntable through the core, and then from the dummy turntable to the turntable beam. This transfers the weight of the pipe column to the load-bearing steel structure, effectively avoiding problems such as the lifting mechanism failing due to the heavy load of the pipe column acting on it, and improving the reliability and lifespan of the equipment.

[0023] Preferably, the dummy turntable core includes a core body and at least two connecting sleeves, the connecting sleeves being fixedly connected to the core body, and the connecting sleeves having strip grooves; the walking beam includes a walking beam body and at least two connecting rods, the connecting rods being fixedly connected to the walking beam body, the connecting rods being able to be inserted into the connecting sleeves, the connecting rods having through holes for a pin to pass through, the pin passing through the strip grooves and inserted into the through holes; the stepped portion is used to support the core body.

[0024] With this structural design, the slot on the connecting sleeve provides a certain vertical sliding stroke for the pin. When the walking beam rises, the pin slides upward within the slot and presses against the upper edge of the slot. At this time, the pin lifts the core body upward together, achieving synchronous lifting of the core and the walking beam. During the descent of the walking beam, the core body falls first and is supported by the stepped part of the dummy turntable, thereby transferring the weight of the tubing to the dummy turntable and its lower structure (turntable beam). The walking beam continues to descend into place under the drive of the lifting mechanism, while the pin moves downward within the slot, preventing the core from continuing to descend (the slot provides a free stroke for the pin). This effectively avoids the weight of the tubing directly pressing on the lifting mechanism, protecting the lifting mechanism from overload and extending the equipment's lifespan.

[0025] Preferably, there are four connecting sleeves, which are evenly distributed on the core body, and four connecting rods, the positions of which correspond to the connecting sleeves.

[0026] With this structural design, the four connecting sleeves are evenly connected to the core body, and the four connecting rods are correspondingly arranged with the connecting sleeves, forming a spatially symmetrical multi-point connection structure. This effectively disperses the load, avoids excessive stress on a single point, and significantly improves the overall stability and resistance to eccentric loads.

[0027] Preferably, the passive rotating device is a rolling bearing.

[0028] The passive rotation device is set to a rolling bearing. The rolling bearing carries torque by rolling steel balls or rollers between the inner and outer rings, which can significantly reduce the coefficient of friction. Furthermore, industrial-grade rolling bearings have a long service life and high reliability, making them more suitable for drilling rigs or workover rigs to run tubing.

[0029] Preferably, the lifting mechanism is a hydraulic lift.

[0030] The lifting mechanism is set as a hydraulic lift, and the hydraulic system has obvious advantages in thrust and power performance, which fully meets the pressure requirements of horizontal wells for running tubing.

[0031] Preferably, the lifting mechanism is a double-acting hydraulic cylinder.

[0032] The lifting mechanism is equipped with a double-acting hydraulic cylinder, whose extension and retraction are actively driven by hydraulic pressure. It does not rely on gravity return or external spring reset, and can maintain stable and controllable reciprocating motion under complex loads, making it more suitable for the tubing pressurization requirements of horizontal wells.

[0033] Preferably, the slip is a hydraulic slip.

[0034] The clamps are set to hydraulic clamps. By adjusting the oil pressure, the closing force of the clamps can be flexibly set during operation, realizing a quick adjustment from light clamping to heavy clamping, avoiding damage to the threads due to excessive tightness or slippage due to excessive looseness.

[0035] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0036] 1. This utility model provides a tubing pressurization device for horizontal wells. It can be installed on the base of a drilling rig or workover rig. The rotary beam is interchangeable with the rotary beam of the drilling rig or workover rig base. The size and model of the rotary beam can be customized according to different drilling rig or workover rig models. After the tubing operation is completed on the rotary table, the slip handle can be operated to open the slips. The passive rotation device between the slips and the walking beam rotates with the tubing, providing rotational freedom for the slips during tubing rotation. The lifting mechanism handle is operated to extend the telescopic end of the lifting mechanism upwards, causing the walking beam to rise for the entire stroke. Afterwards, the slip handle can be operated to close the slips and clamp the tubing. Then, the telescopic end of the lifting mechanism retracts, cooperating with the drilling rig top drive to slowly send the tubing into the well, achieving the tubing pressurization function.

[0037] 2. This utility model provides a tubing pressurization device for horizontal wells, which can pressurize the tubing through a lifting mechanism, effectively supplementing the tubing's own weight, significantly reducing tubing jamming and suspension risks, extending the length of the horizontal section, and helping to improve single-well productivity. Attached Figure Description

[0038] Figure 1 A schematic diagram of a tubing pressurization device used in horizontal wells;

[0039] Figure 2 This is a top view of the turntable beam;

[0040] Figure 3 A cross-sectional view of a tubing pressurization device used in horizontal wells;

[0041] Figure 4 A schematic diagram of the passive rotating device when the walking beam is installed;

[0042] Figure 5 A sectional view of the passive rotating device when the walking beam is installed;

[0043] Figure 6 A schematic diagram showing the connection between the dummy turntable core and the walking beam;

[0044] Figure 7 Schematic diagram of the core-filling structure for a dummy turntable;

[0045] Figure 8 This is a schematic diagram of a walking beam structure.

[0046] Marked in the image:

[0047] 1-Lifting mechanism, 2-Walking beam, 21-Connecting rod, 211-Through hole, 22-Walking beam body, 23-Pin, 3-Passive rotation device, 4-Cladle, 51-Longitudinal beam, 52-Crossbeam, 6-Flange plate, 7-Dummy turntable, 8-Dummy turntable filler core, 81-Connecting sleeve, 811-Strip groove, 82-Filler core body. Detailed Implementation

[0048] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0049] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0050] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0051] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0052] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0053] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0054] Example 1

[0055] This embodiment provides a tubing pressurization device for horizontal wells. The device can be installed on the rotary table mounting position of a drilling rig or workover rig base. It includes a rotary table beam and a lifting mechanism 1. The fixed end of the lifting mechanism 1 is fixedly connected to the rotary table beam, and the telescopic end of the lifting mechanism 1 is connected to a walking beam 2. The telescopic end of the lifting mechanism 1 can drive the walking beam 2 to move vertically up and down. Specifically, as shown... Figure 1 As shown, the lifting mechanism 1 can be a hydraulic lift. Taking a hydraulic lift as an example, the fixed end of the hydraulic lift is usually the cylinder body of the hydraulic cylinder; the telescopic end of the hydraulic lift is usually one end of the piston rod (push rod) of the hydraulic cylinder.

[0056] In this embodiment or other embodiments, the lifting mechanism 1 can also be a double-acting hydraulic cylinder. By configuring the lifting mechanism 1 as a double-acting hydraulic cylinder, its extension and retraction are actively driven by hydraulic pressure, eliminating the need for gravity return or external spring reset. This allows it to maintain stable and controllable reciprocating motion under complex loads, making it more suitable for the tubing pressurization requirements of horizontal wells.

[0057] In this embodiment or other embodiments, the turntable beam includes: two parallel longitudinal beams 51 and two parallel transverse beams 52, wherein the longitudinal beams 51 and transverse beams 52 are orthogonal. Specifically, as shown... Figure 1 , Figure 2 The longitudinal beam 51 and the transverse beam 52 shown are perpendicular, and both the longitudinal beam 51 and the transverse beam 52 can be made of I-beams.

[0058] Two longitudinal beams 51 and two transverse beams 52 form an orthogonal frame structure, giving the turntable beam high stiffness and strength in the longitudinal, transverse, and torsional directions. This effectively resists complex loads from wellhead equipment and the tubing string during installation, improving structural reliability. The I-beam has an I-shaped cross-section, which has advantages such as large moment of inertia, large modulus, high bending stiffness, and high strength. When subjected to complex loads generated during tubing string installation, it can maintain less deformation, thus ensuring the stability of the device.

[0059] In this embodiment or other embodiments, the tubing pressurization device for horizontal wells further includes four flange plates 6, located at the four corners of the frame formed by the longitudinal beams 51 and the transverse beams 52. The same flange plate 6 is simultaneously fixedly connected to the intersecting longitudinal beams 51 and transverse beams 52. The number of lifting mechanisms 1 is four, and the fixed end of each lifting mechanism 1 is fixedly connected to the flange plate 6. Specifically, as shown... Figure 2 As shown, four flange plates 6 are located at the four corners of the frame. Each flange plate 6 is simultaneously welded to the adjacent longitudinal beam 51 and transverse beam 52. The hydraulic cylinder of the hydraulic lift can be welded to the corresponding flange plate 6. The piston rod of the hydraulic lift is bolted to the walking beam 2.

[0060] With this structural arrangement, the four lifting mechanisms 1 are located at the four corners of the orthogonal frame formed by the two longitudinal beams 51 and the two transverse beams 52, and the fixed ends of the lifting mechanisms 1 are rigidly connected to the longitudinal and transverse beams through the flange plates 6, which ensures the stability of the connection of the lifting mechanisms 1. It is not necessary to occupy other space for fixing the lifting mechanisms 1. The lifting mechanisms 1 are "suspended" under the turntable beam through the flange plates 6, which saves space and is more suitable for the narrow space of the workover rig or drilling rig base.

[0061] Flange plate 6 is fixedly connected to the longitudinal and transverse beams 52 at the intersection (e.g., by welding or bolting) to form a rigid triangular support unit, which improves the local stiffness and planar stiffness of the frame. The lifting mechanism 1 transmits the force directly to the turntable beam through flange plate 6. Under the condition of simultaneous force at four points, the connection nodes between beams are less prone to shear slip or local buckling, ensuring that the entire frame remains stable during the pressurization process.

[0062] like Figure 4 As shown, the walking beam 2 is connected to the slip 4 via a passive rotating device 3, which can rotate relative to the walking beam 2. Specifically, as... Figure 3 As shown, the slip 4 can be a hydraulic slip. Further hydraulic slips can be linked with a central hydraulic system, allowing for remote hydraulic operation via buttons or program commands from the control panel. This eliminates the need for close contact between the slip 4 and the operator, reducing the risk of mechanical injury to personnel operating under high pressure. Figure 5 As shown, the passive rotating device 3 can be a rolling bearing commonly used in industrial production.

[0063] The tubing pressurization device for horizontal wells provided in this embodiment can be installed on the base of a drilling rig or workover rig. The rotary table beam can be interchanged with the rotary table beam of the drilling rig or workover rig base. The size and model of the rotary table beam can be customized according to different drilling rig or workover rig models.

[0064] After the tubing string operation is completed on the rotary table, the slip 4 handle can be operated to open the slip 4. The passive rotating device 3 between the slip 4 and the walking beam 2 can rotate with the tubing string, providing rotational freedom for the slip 4 during tubing string rotation. The lifting mechanism 1 handle is operated to extend the telescopic end of the lifting mechanism 1 upwards, causing the walking beam 2 to rise for the entire stroke. Then, the slip 4 handle can be operated to close the slip 4 and clamp the tubing string. Afterwards, the telescopic end of the lifting mechanism 1 retracts, cooperating with the drilling rig top drive to slowly send the tubing string into the well, achieving the tubing string pressurization function. The tubing string pressurization device for horizontal wells provided in this embodiment can pressurize the tubing string through the lifting mechanism 1, significantly reducing tubing string jamming and suspension risks, extending the horizontal section length, and helping to improve single-well productivity.

[0065] Example 2

[0066] like Figure 1 , Figure 3 As shown, based on Embodiment 1, the tubing pressurization device for horizontal wells provided in this embodiment also includes a dummy rotary table 7 and a dummy rotary table filler 8. The dummy rotary table 7 is installed on the top of the rotary table beam, and the dummy rotary table filler 8 is located inside the dummy rotary table 7. The dummy rotary table filler 8, the dummy rotary table 7, the passive rotation device 3, and the slips 4 are all concentrically arranged, and the dummy rotary table filler 8 is connected to the walking beam 2.

[0067] With this structural design, the shape and interface dimensions of the dummy rotary table 7 can be identical to the original rotary table of the drilling rig or workover rig base. Once on-site, only the original rotary table needs to be removed, and the dummy rotary table 7 fixed to the base, requiring minimal modification to the drilling rig base. This significantly shortens installation time and reduces modification risks. The dummy rotary table 7 fits tightly against the original rotary table of the drilling rig or workover rig base, preventing localized stress concentration or tilting during construction and ensuring the entire pressurizing device and drilling rig or workover rig base form an integrated force-bearing structure. Dummy rotary table inserts 8 with corresponding bore diameters can be used for tubing strings of different diameters, ensuring the tubing string remains concentric within the dummy rotary table 7 and preventing torque shift and uneven friction caused by eccentricity. The bore diameter of the dummy rotary table insert 8 can be customized or replaced according to the outer diameter of the tubing string used on-site. There is no need to replace the entire dummy rotary table 7; only the dummy rotary table insert 8 needs to be removed and replaced for quick adaptation to different diameter tubing strings.

[0068] Example 3

[0069] like Figures 3-8As shown, based on Embodiment 2, the tubing pressurization device for horizontal wells provided in this embodiment has a stepped part inside the dummy rotary table 7. The stepped part is used to support the dummy rotary table core 8. The dummy rotary table core 8 is movably connected to the walking beam 2 in the vertical direction.

[0070] With this structural design, the stepped section supports the dummy rotary table core 8. When the walking beam 2 and the dummy rotary table core 8 fall back on the lifting mechanism 1, the axial load of the tubing string is transferred to the dummy rotary table 7 through the core (at this time, the top of the tubing string is disengaged from the overhead crane on the top of the drilling rig or workover rig), and then transferred to the rotary table beam by the dummy rotary table 7. This achieves the transfer of the weight of the tubing string to the load-bearing steel structure, effectively avoiding problems such as the failure of the lifting mechanism 1 due to the heavy load of the tubing string acting on it, and improving the reliability and lifespan of the equipment.

[0071] Specifically, the dummy turntable filler core 8 includes a filler core body 82 and at least two connecting sleeves 81, preferably four connecting sleeves 81, which are evenly distributed on the lower surface of the filler core body 82. The upper outline of the filler core body 81 can be rectangular, and the rectangular filler core body 81 can be locked at the step, which can restrict the filler core body 81 from moving further downward.

[0072] The connecting sleeve 81 is fixedly connected to the core body 82. The connecting sleeve 81 has a strip groove 811, which can extend vertically and can be located at one end of the connecting sleeve 81 near the walking beam 2.

[0073] The walking beam 2 includes a walking beam body 22 and at least two connecting rods 21. Preferably, the number of connecting rods 21 is four, and the positions of the connecting rods 21 correspond to the connecting sleeves 81.

[0074] The connecting rod 21 is fixedly connected to the walking beam body 22. The connecting rod 21 can be inserted into the connecting sleeve 81. The connecting rod 21 has a through hole 211 for the pin 23 to pass through. The through hole 211 can be set at one end of the connecting rod 21 near the dummy turntable core 8. The pin 23 passes through the strip groove 811 and is inserted into the through hole 211. The pin 23 can move vertically in the strip groove 811. The stepped part is used to support the core body 82.

[0075] With this structural design, the strip groove 811 on the connecting sleeve 81 provides a certain vertical sliding stroke for the pin 23. When the walking beam 2 rises, the pin 23 slides upward in the strip groove 811 and presses against the upper edge of the strip groove 811. At this time, the pin 23 lifts the core body 82 upward together, realizing the synchronous lifting of the core and the walking beam 2. During the descent of the walking beam 2, the core body 82 falls first and is supported by the stepped part of the dummy turntable 7, thereby transferring the weight of the tube column to the dummy turntable 7 and its lower structure (turntable beam). The walking beam 2 continues to descend to its position under the drive of the lifting mechanism 1, while the pin 23 moves downward in the strip groove 811 and will not drive the core to continue to descend (the strip groove 811 provides a section of idle stroke for the pin 23), effectively preventing the weight of the tube column from directly pressing on the lifting mechanism 1, protecting the lifting mechanism 1 from overload, and extending the service life of the equipment.

[0076] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tubular string pressurizing device for a horizontal well, characterized in that, The utility model relates to a kind of rotary table beam and lifting mechanism (1), the fixed end of the lifting mechanism (1) is fixedly connected with the rotary table beam, the telescopic end of the lifting mechanism (1) is connected with beam (2), the telescopic end of the lifting mechanism (1) can drive the beam (2) vertically moves up and down. The beam (2) is connected with slip bowl (4) by passive rotating device (3), and the passive rotating device (3) can rotate relative to the beam (2). The rotary table beam includes two mutually parallel longitudinal beams (51) and two mutually parallel cross beams (52), and the longitudinal beams (51) and the cross beams (52) are orthogonal.

2. A tubular string pressuring device for horizontal wells according to claim 1, characterized in that, The longitudinal beams (51) and the cross beams (52) are both I-beam.

3. A tubular string pressuring device for horizontal wells according to claim 2, characterized in that, It also includes four flange plates (6), the flange plates (6) are located at the four corners of the frame surrounded by the longitudinal beams (51) and the cross beams (52), the same flange plate (6) is fixedly connected with the intersecting longitudinal beam (51) and cross beam (52); The number of the lifting mechanism (1) is four, and the fixed end of the lifting mechanism (1) is fixedly connected with the flange plate (6).

4. A tubular string pressuring device for horizontal wells according to claim 2, characterized in that, It also includes a dummy rotary table (7), which is installed on the top of the rotary table beam.

5. The tubular string pressuring device for horizontal wells of claim 1, wherein, It also includes a dummy rotary table core (8), which is located in the dummy rotary table (7), and the dummy rotary table core (8), the dummy rotary table (7), the passive rotating device (3), and the slip bowl (4) are concentrically arranged, and the dummy rotary table core (8) is connected with the beam (2).

6. A tubular string pressuring device for horizontal wells as defined in claim 5, characterized in that, The inside of the dummy rotary table (7) is provided with a stepped portion for supporting the dummy rotary table core (8), and the dummy rotary table core (8) is movably connected with the beam (2) in the vertical direction.

7. A tubular string pressuring device for horizontal wells according to claim 6, characterized in that, The dummy rotary table core (8) includes a core body (82) and at least two connecting sleeves (81), the connecting sleeves (81) are fixedly connected with the core body (82), and the connecting sleeves (81) are provided with a strip-shaped slot (811).

8. A tubular string pressuring device for horizontal wells according to claim 7, characterized in that, The beam (2) includes a beam body (22) and at least two connecting rods (21), the connecting rods (21) are fixedly connected with the beam body (22), the connecting rods (21) can be inserted into the connecting sleeves (81), the connecting rods (21) are provided with through holes (211) for passing through the pin shaft (23), and the pin shaft (23) is inserted into the through holes (211) through the strip-shaped slot (811). The stepped portion is used to support the core body (82). The number of the connecting sleeves (81) is four, the connecting sleeves (81) are evenly distributed on the core body (82), and the number of the connecting rods (21) is four, and the positions of the connecting rods (21) correspond to the connecting sleeves (81).

9. A tubular string pressuring device for horizontal wells according to claim 8, characterized in that, The passive rotating device (3) is a rolling bearing.

10. A tubular string pressuring device for horizontal wells according to any of claims 1-9, characterized in that, ​

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