An internal and external swing frame reciprocating linear transmission mechanism and a drilling-based active cooling power device

Abstract

The present invention provides an inner-outer swing frame reciprocating linear transmission mechanism and an active cooling power device while drilling. In the inner-outer swing frame reciprocating linear transmission mechanism, a first shaft is installed in a housing so as to rotate and slide along the axial direction of the housing, an outer raceway structure of the first shaft is provided in the middle of the first shaft, an inner raceway structure of the inner swing frame is provided on the inner ring side wall of the inner swing frame, a first journal of the inner swing frame and a second journal of the inner swing frame are provided on the outer ring side wall of the inner swing frame, a first hole of the outer swing frame, a first journal of the outer swing frame, a second hole of the outer swing frame and a second journal of the outer swing frame are provided on the outer swing frame, the inner swing frame is sleeved in the middle of the first shaft, a plurality of rolling bodies are installed between the outer raceway structure of the first shaft and the inner raceway structure of the inner swing frame, the first journal of the inner swing frame and the second journal of the inner swing frame are rotatably installed in the first hole and the second hole of the outer swing frame in a one-to-one correspondence, and the first journal of the outer swing frame and the second journal of the outer swing frame are rotatably installed in the housing.

Description

Technical Field

[0001] The present invention relates to the field of drilling technology, in particular to an inner and outer swing frame reciprocating linear transmission mechanism and a drilling-while-active cooling power device. Background Art

[0002] Oil and gas well boreholes are formed by rotating the drill string or using downhole power tools to drive the drill bit through the subsurface rock. To ensure safe and efficient drilling operations, continuous monitoring of near-bit engineering parameters such as weight on bit, torque, annular water pressure, and temperature, as well as geological parameters such as resistivity, porosity, and gamma-ray while drilling, is required. To obtain these while-drilling engineering and geological parameters, various parameter measurement circuits or sensors must be installed at the bottom of the drill string and near the drill bit.

[0003] With increasing energy demand, the exploration and development of deep and ultra-deep oil and gas resources has become a crucial area for increasing reserves and production. However, during drilling into deep and ultra-deep formations, high formation temperatures exceed the upper temperature limits of various components and sensors in measurement and control systems while drilling, causing them to malfunction or even fail. Generally speaking, high temperatures induce failure of various components and sensors in measurement and control systems while drilling in two modes: 1) When the components or sensors are operating, the thermal stress generated by their own temperature rise reduces their service life; 2) When the ambient temperature in deep and ultra-deep formations reaches a critical value, various components and sensors in the measurement and control system will be damaged. Failures caused by overheating not only increase the cost of replacing failed components and sensors, but also the lack of high-temperature-resistant electronic components makes it impossible to meet the needs of exploration and development of deeper oil and gas resources.

[0004] Currently, high-temperature resistance technology for downhole tools in oil and gas wells has been identified as a key core technology for achieving breakthroughs in the efficient exploration and profitable development of deep and ultra-deep oil and gas resources. Therefore, developing core module technologies for high-temperature-resistant measurement and control systems while drilling is crucial and urgently needed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an inner and outer swing frame reciprocating linear transmission mechanism and a drilling-time active cooling power device in response to the deficiencies of the existing technology.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: an inner and outer swing frame reciprocating linear transmission mechanism, comprising: a shell, a first shaft, a plurality of rolling elements, an outer swing frame, and an inner swing frame, the first shaft rotates and is installed in the shell along the axial direction of the shell, the middle part of the first shaft is provided with an outer raceway structure of the first shaft, the inner ring side wall of the inner swing frame is provided with an inner raceway structure of the inner swing frame, the outer ring side wall of the inner swing frame is provided with a first shaft neck of the inner swing frame and a second shaft neck of the inner swing frame, the outer swing frame is provided with a first hole of the outer swing frame, a first shaft neck of the outer swing frame, a second hole of the outer swing frame and a second shaft neck of the outer swing frame, the inner swing frame is sleeved in the middle part of the first shaft, a plurality of rolling elements are installed between the outer raceway structure of the first shaft and the inner raceway structure of the inner swing frame, the first shaft neck of the inner swing frame and the second shaft neck of the inner swing frame are rotatably installed in the first hole of the outer swing frame and the second hole of the outer swing frame in a one-to-one manner, and the first shaft neck of the outer swing frame and the second shaft neck of the outer swing frame are rotatably installed in the shell.

[0007] The beneficial effects of the technical solution of the present invention are as follows: the outer swing frame is provided with a first hole of the outer swing frame and a second hole of the outer swing frame, which match the first journal of the inner swing frame and the second journal of the inner swing frame, so that a cylindrical pair is formed between the inner swing frame and the outer swing frame. Under the strict radial dimension conditions of downhole drilling tools, the reciprocating linear transmission mechanism of the inner and outer swing frames enables the power device with smaller radial dimensions to meet the structural requirements of the drilling tools, provide a stable and periodic pressure wave for the refrigeration device, and drive the active cooling device to work and generate cold energy, so as to balance the heat transferred to the downhole measurement and control system from the high temperature environment and the self-generated heat generated during the operation of the downhole measurement and control system, reduce the operating temperature of the downhole measurement and control system to below the ambient temperature that the system can withstand, and thus form a high-temperature resistant downhole measurement and control system, improve the level of safe and efficient drilling technology for deep wells and ultra-deep wells, and realize efficient exploration and profitable development of oil and gas resources. It solves the problem that various components or sensors of the existing downhole measurement and control system are not resistant to high temperatures.

[0008] Furthermore, the outer raceway structure of the first shaft and the inner raceway structure of the inner swing frame are both rotational surfaces and plane-symmetrical surfaces. The symmetry plane of the outer raceway structure of the first shaft has an angle with the axis of the first shaft. The axes of the first journal of the inner swing frame and the second journal of the inner swing frame are located in the symmetry plane of the inner raceway structure of the inner swing frame. The axes of the first journal of the outer swing frame and the second journal of the outer swing frame are orthogonal to the axis of the first shaft.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are: the design of the structure and position of each component realizes the function of the reciprocating linear transmission mechanism of the inner and outer swing frames, and improves stability and reliability.

[0010] Furthermore, the first journal of the inner swing frame and the second journal of the inner swing frame are coaxially arranged, the first hole of the outer swing frame and the second hole of the outer swing frame are coaxially arranged, and the first journal of the outer swing frame and the second journal of the outer swing frame are coaxially arranged.

[0011] The beneficial effects of adopting the above-mentioned further technical solution are: the design of the structure and position of each component realizes the function of the reciprocating linear transmission mechanism of the inner and outer swing frames, and improves stability and reliability.

[0012] Furthermore, the first shaft is rotatably mounted in the housing through a first bearing and a second bearing and is slidably mounted along the axial direction of the housing. The first bearing and the second bearing are located on both sides of the outer raceway structure of the first shaft in a one-to-one correspondence.

[0013] The beneficial effect of adopting the above-mentioned further technical solution is that the first shaft and the housing are supported by the first bearing and the second bearing, and the first bearing and the second bearing respectively form a cylindrical pair with the first shaft, so that the first shaft has both rotational freedom relative to the housing and translational freedom along the axis of the first shaft.

[0014] In addition, the present invention also provides an active cooling power device while drilling, including an inner and outer swing frame reciprocating linear transmission mechanism as described in any one of the above items, and also including: a cylinder body, a piston and an adjustment mechanism, the cylinder body is connected to the shell, one end of the first shaft is connected to the piston through the adjustment mechanism, and the piston is slidably installed in the cylinder body.

[0015] The beneficial effect of the technical solution of the present invention is that the piston and the inner hole of the cylinder form a cylindrical kinematic pair with a certain radial clearance. The setting of the adjustment mechanism allows the first axis and the piston to adapt to a certain degree of misalignment. Under the strict radial dimension conditions of downhole drilling tools, through the action of the reciprocating linear transmission mechanism of the inner and outer swing frames, the power device with smaller radial dimensions can meet the structural requirements of the drilling tools, provide stable and periodic pressure waves for the refrigeration device, and drive the active cooling device to work and generate cold energy, so as to balance the heat transferred to the downhole measurement and control system from the high temperature environment and the self-generated heat generated during the operation of the downhole measurement and control system, reduce the operating temperature of the downhole measurement and control system to below the ambient temperature that it can withstand, and thus form a high-temperature resistant downhole measurement and control system, improve the level of safe and efficient drilling technology for deep wells and ultra-deep wells, and realize efficient exploration and profitable development of oil and gas resources. Solve the problem that various components or sensors of the existing downhole measurement and control system are not resistant to high temperatures.

[0016] Furthermore, the adjustment mechanism is a second pin shaft, the axis of the second pin shaft is perpendicular to the axis of the first shaft, and one end of the first shaft is connected to the piston through the second pin shaft.

[0017] The beneficial effect of adopting the above further technical solution is that the piston is connected to the first shaft through the second pin shaft, so that the piston has rotational freedom around the axis of the second pin shaft relative to the first shaft. This design can adapt to a certain degree of processing error and installation error.

[0018] Furthermore, the adjustment mechanism includes: a first pin shaft, a universal cross shaft, and a second pin shaft, one end of the universal cross shaft is connected to the piston through the second pin shaft, and the other end of the universal cross shaft is connected to one end of the first shaft through the first pin shaft.

[0019] The beneficial effect of adopting the above-mentioned further technical solution is that one end of the universal cross shaft is connected to the piston through the second pin shaft and has the freedom of rotation around the axis of the second pin shaft, and the other end of the universal cross shaft is connected to the first shaft through the first pin shaft and has the freedom of rotation around the axis of the first pin shaft.

[0020] Furthermore, the adjustment mechanism includes: a first pin shaft, a universal cross shaft, a second pin shaft, a second shaft, a third bearing, a fourth bearing, and an elastic element. One end of the second shaft is connected to one end of the first shaft through the third bearing, and the second shaft is installed in the housing through the fourth bearing. The other end of the universal cross shaft is connected to the piston through the second pin shaft, and one end of the universal cross shaft is connected to the other end of the second shaft through the first pin shaft. The elastic element is sleeved on the outside of the second shaft.

[0021] The beneficial effects of adopting the above further technical solution are: one end of the universal cross shaft is connected to the second shaft through the first pin shaft and has a degree of freedom of rotation around the axis of the first pin shaft, and the other end of the universal cross shaft is connected to the piston through the second pin shaft and has a degree of freedom of rotation around the axis of the second pin shaft;

[0022] Furthermore, one end of the elastic element is connected to the second shaft, and the other end of the elastic element is connected to the fourth bearing.

[0023] The beneficial effect of adopting the above further technical solution is that the provision of the elastic element facilitates the resetting of the second shaft and facilitates the user to select the installation position of the elastic element according to actual needs.

[0024] Furthermore, one end of the elastic element is connected to the second shaft, and the other end of the elastic element is connected to the housing.

[0025] The beneficial effect of adopting the above further technical solution is that the provision of the elastic element facilitates the resetting of the second shaft and facilitates the user to select the installation position of the elastic element according to actual needs.

[0026] Advantages of additional aspects of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is one of the structural schematic diagrams of the active cooling power device while drilling provided by an embodiment of the present invention.

[0028] Figure 2 This is a second structural diagram of the active cooling while drilling power device provided by an embodiment of the present invention.

[0029] Figure 3 This is the third structural diagram of the active cooling power device while drilling provided by an embodiment of the present invention.

[0030] Figure 4 This is a fourth structural diagram of the active cooling while drilling power device provided by an embodiment of the present invention.

[0031] Figure 5 This is the fifth structural diagram of the active cooling power device while drilling provided by an embodiment of the present invention.

[0032] Figure 6 This is the sixth structural diagram of the active cooling power device while drilling provided by an embodiment of the present invention.

[0033] Figure 7 This is the seventh structural diagram of the active cooling power device while drilling provided by an embodiment of the present invention.

[0034] Explanation of the accompanying numbers: 1. First shaft; 2. First bearing; 3. Rolling element; 4. Outer swing frame; 5. Inner swing frame; 6. Second bearing; 7. Third bearing; 8. Housing; 9. Fourth bearing; 10. First pin; 11. Second pin; 12. Piston; 13. Cylinder; 14. Universal cross shaft; 15. Second shaft; 16. Elastic element; 101. Outer raceway structure of the first shaft; 401. First hole of the outer swing frame; 402. First journal of the outer swing frame; 403. Second hole of the outer swing frame; 404. Second journal of the outer swing frame; 501. Inner raceway structure of the inner swing frame; 502. First journal of the inner swing frame; 503. Second journal of the inner swing frame; 17. Adjustment mechanism. DETAILED DESCRIPTION

[0035] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0036] like Figures 1 to 7As shown, an embodiment of the present invention provides an inner and outer swing frame reciprocating linear transmission mechanism, comprising: a housing 8, a first shaft 1, a plurality of rolling bodies 3, an outer swing frame 4, and an inner swing frame 5. The first shaft 1 is installed in the housing 8 so as to rotate and slide along the axial direction of the housing 8. The middle part of the first shaft 1 is provided with an outer raceway structure 101 of the first shaft, the inner ring side wall of the inner swing frame 5 is provided with an inner raceway structure 501 of the inner swing frame, the outer ring side wall of the inner swing frame 5 is provided with a first shaft neck 502 of the inner swing frame and a second shaft neck 503 of the inner swing frame, the outer swing frame 4 is provided with a first hole 401 of the outer swing frame, an outer swing frame The first journal 402 of the outer swing frame, the second hole 403 of the outer swing frame and the second journal 404 of the outer swing frame, the inner swing frame 5 is sleeved on the middle part of the first shaft 1, and the multiple rolling bodies 3 are installed between the outer raceway structure 101 of the first shaft and the inner raceway structure 501 of the inner swing frame. The first journal 502 of the inner swing frame and the second journal 503 of the inner swing frame are rotatably installed in the first hole 401 of the outer swing frame and the second hole 403 of the outer swing frame respectively. The first journal 402 of the outer swing frame and the second journal 404 of the outer swing frame are rotatably installed in the shell 8.

[0037] The beneficial effects of the technical solution of the present invention are as follows: the outer swing frame is provided with a first hole of the outer swing frame and a second hole of the outer swing frame, which match the first journal of the inner swing frame and the second journal of the inner swing frame, so that a cylindrical pair is formed between the inner swing frame and the outer swing frame. Under the strict radial dimension conditions of downhole drilling tools, the reciprocating linear transmission mechanism of the inner and outer swing frames enables the power device with smaller radial dimensions to meet the structural requirements of the drilling tools, provide a stable and periodic pressure wave for the refrigeration device, and drive the active cooling device to work and generate cold energy, so as to balance the heat transferred to the downhole measurement and control system from the high temperature environment and the self-generated heat generated during the operation of the downhole measurement and control system, reduce the operating temperature of the downhole measurement and control system to below the ambient temperature that the system can withstand, and thus form a high-temperature resistant downhole measurement and control system, improve the level of safe and efficient drilling technology for deep wells and ultra-deep wells, and realize efficient exploration and profitable development of oil and gas resources. It solves the problem that various components or sensors of the existing downhole measurement and control system are not resistant to high temperatures.

[0038] in, Figure 7 The dotted lines in the exploded view represent the positions and trajectories of the components to be removed.

[0039] like Figures 1 to 7As shown, further, the outer raceway structure 101 of the first shaft and the inner raceway structure 501 of the inner swing frame are both rotational surfaces and plane-symmetrical surfaces, the symmetry plane of the outer raceway structure 101 of the first shaft has an angle with the axis of the first shaft 1, the axes of the first journal 502 of the inner swing frame and the second journal 503 of the inner swing frame are located in the symmetry plane of the inner raceway structure 501 of the inner swing frame, and the axes of the first journal 402 of the outer swing frame and the second journal 404 of the outer swing frame are orthogonal to the axis of the first shaft 1.

[0040] The beneficial effects of adopting the above-mentioned further technical solution are: the design of the structure and position of each component realizes the function of the reciprocating linear transmission mechanism of the inner and outer swing frames, and improves stability and reliability.

[0041] like Figures 1 to 7 As shown, further, the first journal 502 of the inner swing frame and the second journal 503 of the inner swing frame are coaxially arranged, the first hole 401 of the outer swing frame and the second hole 403 of the outer swing frame are coaxially arranged, and the first journal 402 of the outer swing frame and the second journal 404 of the outer swing frame are coaxially arranged.

[0042] The beneficial effects of adopting the above-mentioned further technical solution are: the design of the structure and position of each component realizes the function of the reciprocating linear transmission mechanism of the inner and outer swing frames, and improves stability and reliability.

[0043] like Figures 1 to 7 As shown, further, the first shaft 1 is rotated through the first bearing 2 and the second bearing 6 and is installed in the housing 8 in an axially sliding manner. The first bearing 2 and the second bearing 6 are located on both sides of the outer raceway structure 101 of the first shaft in a one-to-one correspondence.

[0044] The beneficial effect of adopting the above-mentioned further technical solution is that the first shaft and the housing are supported by the first bearing and the second bearing, and the first bearing and the second bearing respectively form a cylindrical pair with the first shaft, so that the first shaft has both rotational freedom relative to the housing and translational freedom along the axis of the first shaft.

[0045] The present invention mainly solves the problem that various components or sensors of the existing while-drilling measurement and control system are not resistant to high temperatures. It provides an internal and external swing frame reciprocating linear transmission mechanism, which can serve as the internal and external swing frame reciprocating linear transmission mechanism for the power device of the while-drilling active cooling device. Under the strict radial size conditions of the downhole drilling tool, the internal and external swing frame reciprocating linear transmission mechanism enables the power device with a smaller radial size to meet the structural requirements of the drilling tool, provides a stable and periodic pressure wave for the refrigeration device, drives the active cooling device to work and generate cold energy, so as to balance the heat transferred to the while-drilling measurement and control system by the high-temperature environment and the self-generated heat generated during the operation of the while-drilling measurement and control system, thereby reducing the operating temperature of the while-drilling measurement and control system to below the ambient temperature that the system can withstand, thereby improving the temperature application range of the while-drilling measurement and control system.

[0046] The inner and outer swing frame reciprocating linear transmission mechanism includes: a first shaft, a first bearing, a rolling body, an outer swing frame, an inner swing frame, a second bearing and a housing.

[0047] The first shaft and the housing are supported by a first bearing and a second bearing, and the first bearing and the second bearing respectively form a cylindrical pair with the first shaft, so that the first shaft has both rotational freedom relative to the housing and translational freedom along the axis of the first shaft.

[0048] An outer raceway structure is provided on the first shaft. The outer raceway is a revolution curved surface and a plane-symmetrical curved surface. The symmetry plane of the outer raceway forms a certain angle with the axis of the first shaft, and the two are neither parallel nor perpendicular.

[0049] The inner swing frame is provided with an inner raceway structure (the inner raceway structure of the inner swing frame), and the inner raceway (the inner raceway structure of the inner swing frame) is a rotational curved surface and a plane-symmetrical curved surface. The inner swing frame is also coaxially provided with two journal structures (the first journal of the inner swing frame and the second journal of the inner swing frame), and the two journals are respectively located on both sides of the rotation axis of the inner raceway, and the axis of the journal is located in the symmetry plane of the inner raceway.

[0050] At least three rolling bodies are installed between the outer raceway of the first shaft and the inner raceway of the inner swing frame.

[0051] The outer swing frame is provided with two inner hole structures (the first hole of the outer swing frame and the second hole of the outer swing frame) which match the two shaft necks of the inner swing frame, so that a cylindrical pair is formed between the inner swing frame and the outer swing frame.

[0052] Two journal structures (the first journal of the outer swing frame and the second journal of the outer swing frame) are coaxially arranged on the outer swing frame to cooperate with the two axial holes of the shell at corresponding positions. The axes of the two journals of the outer swing frame are spatially orthogonal to the axis of the first shaft, and are both perpendicular to each other and at a certain distance from each other.

[0053] The active cooling while drilling power device includes a piston, a cylinder body and an inner and outer swing frame reciprocating linear transmission mechanism.

[0054] The inner and outer swing frame reciprocating linear transmission mechanism adopts the inner and outer swing frame reciprocating linear transmission mechanism. The positions of the cylinder body and the housing are relatively fixed.

[0055] The piston and the inner hole of the cylinder form a cylindrical motion pair with a certain radial gap.

[0056] The inner hole of the cylinder, the piston and the first axis of the inner and outer swing frame reciprocating linear transmission mechanism are coaxially installed.

[0057] The piston and the first axis of the reciprocating linear transmission mechanism of the inner and outer swing frames can be connected in a manner that the relative positions remain unchanged, or can be connected in a manner that the relative positions rotate relative to each other.

[0058] Optionally, the piston is completely fixedly connected to the first shaft relative to each other or is connected via a pin (second pin). The pin connection allows the piston to have rotational freedom around the pin axis relative to the first shaft.

[0059] Optionally, a universal cross shaft connection is provided between the piston and the first shaft, one end of the universal cross shaft is connected to the piston through a pin shaft and has the freedom of rotation around the pin shaft axis, and the other end of the universal cross shaft is connected to the first shaft through a pin shaft and has the freedom of rotation around the pin shaft axis.

[0060] Optionally, a second shaft is arranged between the universal cross shaft and the first shaft, a third bearing is arranged between the second shaft and the first shaft, and a fourth bearing is arranged between the second shaft and the housing. One end of the universal cross shaft is connected to the second shaft through a pin shaft and has a degree of freedom of rotation around the axis of the pin shaft, and the other end of the universal cross shaft is connected to the piston through a pin shaft and has a degree of freedom of rotation around the axis of the pin shaft.

[0061] Optionally, an elastic element is provided between the second shaft and the housing.

[0062] Optionally, an elastic element is provided between the second shaft and the fourth bearing.

[0063] like Figures 1 to 7 As shown, in addition, the present invention also provides an active cooling power device while drilling, including an inner and outer swing frame reciprocating linear transmission mechanism as described in any one of the above items, and also including: a cylinder body 13, a piston 12 and an adjustment mechanism 17, the cylinder body 13 is connected to the housing 8, one end of the first shaft 1 is connected to the piston 12 through the adjustment mechanism 17, and the piston 12 is slidably installed in the cylinder body 13.

[0064] The beneficial effect of the technical solution of the present invention is that the piston and the inner hole of the cylinder form a cylindrical kinematic pair with a certain radial clearance. The setting of the adjustment mechanism allows the first axis and the piston to adapt to a certain degree of misalignment. Under the strict radial dimension conditions of downhole drilling tools, through the action of the reciprocating linear transmission mechanism of the inner and outer swing frames, the power device with smaller radial dimensions can meet the structural requirements of the drilling tools, provide stable and periodic pressure waves for the refrigeration device, and drive the active cooling device to work and generate cold energy, so as to balance the heat transferred to the downhole measurement and control system from the high temperature environment and the self-generated heat generated during the operation of the downhole measurement and control system, reduce the operating temperature of the downhole measurement and control system to below the ambient temperature that it can withstand, and thus form a high-temperature resistant downhole measurement and control system, improve the level of safe and efficient drilling technology for deep wells and ultra-deep wells, and realize efficient exploration and profitable development of oil and gas resources. Solve the problem that various components or sensors of the existing downhole measurement and control system are not resistant to high temperatures.

[0065] like Figures 1 to 7 As shown, further, the adjustment mechanism 17 is a second pin shaft 11 , the axis of the second pin shaft 11 is perpendicular to the axis of the first shaft 1 , and one end of the first shaft 1 is connected to the piston 12 through the second pin shaft 11 .

[0066] The beneficial effect of adopting the above further technical solution is that the piston is connected to the first shaft through the second pin shaft, so that the piston has rotational freedom around the axis of the second pin shaft relative to the first shaft. This design can adapt to a certain degree of processing error and installation error.

[0067] like Figures 1 to 7 As shown, further, the adjustment mechanism 17 includes: a first pin shaft 10, a universal cross shaft 14, and a second pin shaft 11. One end of the universal cross shaft 14 is connected to the piston 12 through the second pin shaft 11, and the other end of the universal cross shaft 14 is connected to one end of the first shaft 1 through the first pin shaft 10.

[0068] The beneficial effect of adopting the above-mentioned further technical solution is that one end of the universal cross shaft is connected to the piston through the second pin shaft and has the freedom of rotation around the axis of the second pin shaft, and the other end of the universal cross shaft is connected to the first shaft through the first pin shaft and has the freedom of rotation around the axis of the first pin shaft.

[0069] like Figures 1 to 7As shown, further, the adjustment mechanism 17 includes: a first pin shaft 10, a universal cross shaft 14, a second pin shaft 11, a second shaft 15, a third bearing 7, a fourth bearing 9, and an elastic element 16. One end of the second shaft 15 is connected to one end of the first shaft 1 through the third bearing 7, and the second shaft 15 is installed in the housing 8 through the fourth bearing 9. The other end of the universal cross shaft 14 is connected to the piston 12 through the second pin shaft 11, and one end of the universal cross shaft 14 is connected to the other end of the second shaft 15 through the first pin shaft 10. The elastic element 16 is sleeved on the outside of the second shaft 15.

[0070] The beneficial effects of adopting the above further technical solution are: one end of the universal cross shaft is connected to the second shaft through the first pin shaft and has a degree of freedom of rotation around the axis of the first pin shaft, and the other end of the universal cross shaft is connected to the piston through the second pin shaft and has a degree of freedom of rotation around the axis of the second pin shaft;

[0071] like Figures 1 to 7 As shown, further, one end of the elastic element 16 is connected to the second shaft 15 , and the other end of the elastic element 16 is connected to the fourth bearing 9 .

[0072] The beneficial effect of adopting the above further technical solution is that the provision of the elastic element facilitates the resetting of the second shaft and facilitates the user to select the installation position of the elastic element according to actual needs.

[0073] like Figures 1 to 7 As shown, further, one end of the elastic element 16 is connected to the second shaft 15 , and the other end of the elastic element 16 is connected to the housing 8 .

[0074] The beneficial effect of adopting the above further technical solution is that the provision of the elastic element facilitates the resetting of the second shaft and facilitates the user to select the installation position of the elastic element according to actual needs.

[0075] Example 1

[0076] like Figure 1 As shown, it includes a first shaft 1, a first bearing 2, a rolling element 3, an outer swing frame 4, an inner swing frame 5, a second bearing 6, a housing 8, a second pin 11, a piston 12 and a cylinder 13.

[0077] The first shaft 1 and the housing 8 are supported by the first bearing 2 and the second bearing 6. The first bearing 2 and the second bearing 6 respectively form a cylindrical pair with the first shaft 1, so that the first shaft 1 has both rotational freedom relative to the housing 8 and translational freedom along the axis of the first shaft 1.

[0078] The first shaft 1 is provided with an outer raceway structure 101 of the first shaft. The surface of the outer raceway structure of the first shaft is a revolution curved surface and a plane symmetrical curved surface. The outer raceway structure of the first shaft is convenient for the symmetry plane of the surface to form a certain angle with the axis of the first shaft 1, and the two are neither parallel nor perpendicular.

[0079] The inner swing frame 5 is provided with an inner raceway structure 501 of the inner swing frame. The surface of the inner raceway structure of the inner swing frame is a rotational curved surface and a plane-symmetrical curved surface. Two journal structures are also coaxially provided on the inner swing frame 5, the first journal 502 of the inner swing frame and the second journal 503 of the inner swing frame. The first journal 502 of the inner swing frame and the second journal 503 of the inner swing frame are respectively located on both sides of the rotation axis of the inner raceway structure 501 of the inner swing frame, and the axes of the first journal 502 of the inner swing frame and the second journal 503 of the inner swing frame are located in the symmetry plane of the inner raceway structure 501 of the inner swing frame.

[0080] Six rolling bodies 3 are installed between the outer raceway structure 101 of the first shaft 1 and the inner raceway structure 501 of the inner swing frame 5 .

[0081] The outer swing frame 4 is provided with a first hole 401 of the outer swing frame and a second hole 403 of the outer swing frame, which cooperate with the first journal 502 of the inner swing frame and the second journal 503 of the inner swing frame 5, so that a cylindrical pair is formed between the inner swing frame 5 and the outer swing frame 4.

[0082] The outer swing frame 4 is also coaxially provided with a first journal 402 and a second journal 404 of the outer swing frame for matching with the two axial holes of the shell 8 at the corresponding position. The axes of the first journal 402 and the second journal 404 of the outer swing frame of the outer swing frame 4 are spatially orthogonal to the axis of the first axis 1, and are both perpendicular to each other and at a certain distance from each other.

[0083] The cylinder body 13 and the housing 8 are fixedly mounted.

[0084] The piston 12 and the inner hole of the cylinder 13 form a cylindrical kinematic pair with a certain radial clearance.

[0085] The inner hole of the cylinder body 13, the piston 12 and the first shaft 1 are coaxially mounted.

[0086] The piston 12 is connected to the first shaft 1 via the second pin 11 , so that the piston 12 has a degree of rotational freedom around the axis of the second pin 11 relative to the first shaft 1 . This design can accommodate a certain degree of machining error and installation error.

[0087] Example 2

[0088] like Figure 2As shown, it includes a first shaft 1, a first bearing 2, a rolling element 3, an outer swing frame 4, an inner swing frame 5, a second bearing 6, a housing 8, a first pin 10, a second pin 11, a piston 12, a cylinder 13, and a universal cross shaft 14.

[0089] The same parts as in Example 1 are not described in detail, except that:

[0090] The piston 12 is connected to the first shaft 1 via a universal cross 14 provided between the piston 12 and the first shaft 1 .

[0091] One end of the universal cross shaft 14 is connected to the piston 12 through the second pin shaft 11 and has the freedom of rotation around the axis of the second pin shaft 11. The other end of the universal cross shaft 14 is connected to the first shaft 1 through the first pin shaft 10 and has the freedom of rotation around the axis of the first pin shaft 10.

[0092] Example 3

[0093] like Figure 6 and 7 As shown, it includes a first shaft 1, a first bearing 2, a rolling element 3, an outer swing frame 4, an inner swing frame 5, a second bearing 6, a third bearing 7, a housing 8, a fourth bearing 9, a first pin 10, a second pin 11, a piston 12, a cylinder 13, a universal cross shaft 14, a second shaft 15 and an elastic element 16.

[0094] The same parts as in Example 2 are not described in detail, except that:

[0095] A second shaft 15 is provided between the universal cross shaft 14 and the first shaft 1 , a third bearing 7 is provided between the second shaft 15 and the first shaft 1 , and a fourth bearing 9 is provided between the second shaft 15 and the housing 8 .

[0096] One end of the universal cross shaft 14 is connected to the second shaft 15 through the first pin shaft 10 and has the freedom of rotation around the axis of the first pin shaft 10. The other end of the universal cross shaft 14 is connected to the piston 12 through the second pin shaft 11 and has the freedom of rotation around the axis of the second pin shaft 11.

[0097] The elastic element 16 is provided between the second shaft 15 and the fourth bearing 9 .

[0098] Example 4

[0099] The same parts as those in Example 3 will not be repeated here. The difference is that the elastic element 16 is arranged between the second shaft 15 and the housing 8 .

[0100] At this point, under the strict radial size conditions of downhole drilling tools, the action of the internal and external swing frame reciprocating linear transmission mechanism enables the power unit with smaller radial dimensions to meet the structural requirements of the drilling tools, provide stable and periodic pressure waves for the refrigeration device, and drive the active cooling device to work and generate cold energy, which is used to balance the heat transferred to the while-drilling measurement and control system from the high-temperature environment and the self-generated heat generated during the operation of the while-drilling measurement and control system, and reduce the operating temperature of the while-drilling measurement and control system to below the ambient temperature that the system can withstand, thereby forming a high-temperature resistant while-drilling measurement and control system, improving the level of safe and efficient drilling technology for deep and ultra-deep wells, and realizing efficient exploration and beneficial development of oil and gas resources.

[0101] 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reciprocating linear transmission mechanism for inner and outer swing frames, characterized in that: include: The cam is secured to the cam frame and is adapted to engage said first and second bearings of the cam frame and to engage said first and second bearings of the cam frame. The outer raceway structure of the first shaft and the inner raceway structure of the inner shaft are both rotational surfaces and plane-symmetrical surfaces. The symmetry plane of the outer raceway structure of the first shaft has an angle with the axis of the first shaft. The axes of the first raceway structure of the inner shaft and the second raceway structure of the inner shaft are located in the symmetry plane of the inner raceway structure of the inner shaft. The axes of the first raceway structure of the outer shaft and the second raceway structure of the inner shaft are orthogonal to the axis of the first shaft. The first raceway structure of the inner shaft and the second raceway structure of the outer shaft are coaxially arranged. The first hole of the outer shaft and the second hole of the outer shaft are coaxially arranged. The first raceway structure of the outer shaft and the second raceway structure of the inner shaft are coaxially arranged.

2. The reciprocating linear transmission mechanism of the inner and outer swing frames according to claim 1, characterized in that: The first shaft is rotated by a first bearing and a second bearing and is slidably installed in the housing along the axial direction of the housing. The first bearing and the second bearing are located on both sides of the outer raceway structure of the first shaft in a one-to-one correspondence.

3. A drilling active cooling power device, characterized in that: It includes an inner and outer swing frame reciprocating linear transmission mechanism as described in any one of claims 1 to 2 above, and also includes: a cylinder body, a piston and an adjustment mechanism, the cylinder body is connected to the shell, one end of the first shaft is connected to the piston through the adjustment mechanism, and the piston is slidably installed in the cylinder body.

4. The active cooling while drilling power device according to claim 3, characterized in that: The adjustment mechanism is a second pin shaft, the axis of the second pin shaft is perpendicular to the axis of the first shaft, and one end of the first shaft is connected to the piston through the second pin shaft.

5. The active cooling while drilling power device according to claim 3, characterized in that: The adjustment mechanism includes: a first pin, a universal cross shaft, and a second pin shaft. One end of the universal cross shaft is connected to the piston through the second pin shaft, and the other end of the universal cross shaft is connected to one end of the first shaft through the first pin shaft.

6. The active cooling while drilling power device according to claim 3, characterized in that: The adjustment mechanism includes: a first pin shaft, a universal cross shaft, a second pin shaft, a second shaft, a third bearing, a fourth bearing, and an elastic element. One end of the second shaft is connected to one end of the first shaft through the third bearing, and the second shaft is installed in the housing through the fourth bearing. The other end of the universal cross shaft is connected to the piston through the second pin shaft, and one end of the universal cross shaft is connected to the other end of the second shaft through the first pin shaft. The elastic element is sleeved on the outside of the second shaft.

7. The active cooling while drilling power device according to claim 6, characterized in that: One end of the elastic element is connected to the second shaft, and the other end of the elastic element is connected to the fourth bearing.

8. The active cooling while drilling power device according to claim 6, characterized in that: One end of the elastic element is connected to the second shaft, and the other end of the elastic element is connected to the housing.

Images