Hydraulic turntable and hydraulic control system

Abstract

The invention discloses a hydraulic rotary table and a hydraulic control system, and relates to the technical field of oil drilling, the hydraulic rotary table specifically and structurally comprises a shell, and a containing cavity is formed in the shell; the driven gear is mounted in the accommodating cavity; the turntable is mounted at the top of the driven gear, and the top of the turntable extends upwards to the top surface of the shell; the combined bearing piece is mounted at the bottom of the rotary table, and the combined bearing piece is matched with the inner wall of the containing cavity; and the multiple driving units are installed in the containing cavity at intervals, and the driving units are matched with the driven gears. The hydraulic control system comprises the hydraulic turntable. The technical problems that an existing hydraulic rotating disc is complex in rotating mechanism, low in efficiency and not beneficial to follow-up maintenance are solved.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling, in particular to a hydraulic turntable and a hydraulic control system. Background Art

[0002] At present, with the development of drilling equipment and drilling technology such as top drive, the conditions for using rotary table drilling have begun to decrease. The rotary table is mainly used to bear the weight of all casing strings or drill pipe strings in the well when running casing or drilling, and to move drilling tools when handling drilling accidents.

[0003] The existing hydraulic turntable is based on a conventional turntable and uses a hydraulic motor as power to drive the turntable to rotate at a low speed while retaining the turntable's carrying capacity. However, the transmission structure of the existing hydraulic turntable is relatively complex. It takes multiple stages of transmission to achieve the rotation of the turntable, resulting in a 20-30% mechanical efficiency loss, low efficiency, and inconvenience for subsequent maintenance. Summary of the invention

[0004] The purpose of the present invention is to provide a hydraulic turntable and a hydraulic control system, which solve the technical problems in the prior art that the rotating mechanism of the hydraulic turntable is complex, inefficient, and not conducive to subsequent maintenance.

[0005] The embodiment of the present application discloses a hydraulic turntable, comprising: A housing, wherein a housing cavity is provided inside the housing; A driven gear is installed inside the accommodating cavity; A rotating disk is mounted on the top of the driven gear, and the top of the rotating disk extends upward to the top surface of the housing; A combined bearing component is installed at the bottom of the rotating disk, and the combined bearing component is matched with the inner wall of the accommodating cavity; A plurality of driving units are installed in the accommodating cavity at intervals, and the driving units cooperate with the driven gears; The driving unit comprises: A hydraulic motor is installed inside the accommodating cavity; A driving gear is installed at the output end of the hydraulic motor, and the driving gear is meshed with the driven gear.

[0006] The drive unit of the present application is designed to adopt a structure in which the driving gear directly drives the driven gear, which can reduce transmission losses and also facilitate the subsequent provision of greater torque.

[0007] Based on the above technical solution, the embodiment of the present application can also be improved as follows: Furthermore, there are three drive units; the angle between any two adjacent drive units is α, one α is an acute angle, and the remaining two α are obtuse angles. The beneficial effect of adopting this step is that the torque can be better guaranteed by multiple drive units.

[0008] Furthermore, the hydraulic motor is a low-speed, high-torque hydraulic motor. The beneficial effect of adopting this step is that the high-torque requirements of customers can be met by the low-speed, high-torque hydraulic motor.

[0009] Furthermore, the diameter of the driving gear is smaller than the diameter of the driven gear.

[0010] Furthermore, a plurality of suspended weight sensors are installed at the bottom of the shell. The beneficial effect of adopting this step is that the load size of the turntable can be detected by the suspended weight sensors, thereby achieving better control.

[0011] Furthermore, a hoop finder is installed at the bottom of the shell. The beneficial effect of adopting this step is that the coupling can be detected by the hoop finder, which facilitates the hydraulic slips to work better.

[0012] Further, the hoop finder comprises: A hoop search frame is installed on the top of the shell; A plurality of laser sensors are distributed at intervals along the circumferential direction of the hoop search frame. The beneficial effect of adopting this step is that position detection can be better completed by using a plurality of laser sensors.

[0013] Furthermore, a plurality of fixing seats are arranged at intervals at the bottom of the shell. The beneficial effect of adopting this step is that the stability of the entire device can be ensured by the fixing seats.

[0014] The present application also discloses a hydraulic control system, comprising: Hydraulic turntable; A plurality of proportional valves are connected to the hydraulic motors of the hydraulic rotary table in a one-to-one correspondence, and the proportional valves are arranged in parallel; A plurality of shuttle valves, each of which is connected to two ends of the hydraulic motor; A plurality of one-way valves, one end of which is connected to the shuttle valves one by one; The pressure reducing relief valve is communicated with the other end of the one-way valve.

[0015] Based on the above technical solution, the embodiment of the present application can also be improved as follows: Furthermore, the opening pressure of the pressure reducing relief valve is 1.2-3MPa, and the maximum bearing pressure is 8MPa.

[0016] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. The present application is provided with a plurality of drive units for providing a large torque, and the driving gear directly drives the driven gear, which can improve the efficiency, and has few wearing parts and is easy to replace.

[0017] 2. This application is for three sets of hydraulic motors, which can work simultaneously or individually, with higher working speed and greater torque.

[0018] 3. This application is equipped with multiple suspended weight sensors, which can detect and provide the load size of the turntable and provide accurate signals for subsequent system work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a structural schematic diagram of a hydraulic turntable according to a specific embodiment 1 of the present invention; Figure 2 for Figure 1 Side view of Figure 3 for Figure 1 Schematic diagram of the internal structure; Figure 4 for Figure 3 AA structural diagram; Figure 5 for Figure 1 A schematic diagram of the structure of the middle hoop finder; Figure 6 It is a schematic diagram of a hydraulic control system according to a specific embodiment 2 of the present invention; Reference numerals: 1-housing; 2-driven gear; 3-turntable; 4-combined bearing; 5-driving unit; 6-hoop finder; 7-fixed seat; 8-suspended weight sensor; 9-hydraulic turntable; 10-proportional valve; 11-shuttle valve; 12-check valve; 13-pressure relief valve; 101-accommodating cavity; 501- hydraulic motor; 502- driving gear; 601-searching hoop frame; 602-laser sensor. DETAILED DESCRIPTION

[0021] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the invention belongs.

[0022] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Example: like Figure 1-5 As shown, an embodiment of the present application discloses a hydraulic turntable, which cooperates with the hydraulic cava in top drive drilling operations to improve safety. The present application replaces the traditional turntable, adopts hydraulic control, can lock the brake, and withstand reverse torque, thereby improving safety.

[0025] like Figure 1 , 4 As shown, the specific structure of this application includes: The housing 1 has a receiving cavity 101 disposed therein. The housing 1 is an existing housing and may be in a square shape. The receiving cavity 101 therein is used to install other components, such as a subsequent driven gear, etc., for transmission cooperation and also capable of withstanding reverse torque; The driven gear 2 is installed inside the accommodating cavity 101. Specifically, the driven gear 2 is subsequently connected to the rotating disk by bolts, so that when the rotating disk rotates, the driven gear 2 can rotate accordingly; The rotating disk 3 is mounted on the top of the driven gear 2, and the top of the rotating disk 3 extends upward to the top surface of the housing 1, that is, the rotating disk 3 is subsequently matched with the hydraulic slips; A combined bearing member 4 is installed at the bottom of the turntable 3, and the combined bearing member 4 matches the inner wall of the accommodating cavity 101. The combined bearing member 4 includes a main bearing, an anti-jump bearing, etc., which facilitates the subsequent stable rotation of the turntable 3; A plurality of driving units 5 are installed at intervals in the accommodating cavity 101 , and the driving units 5 cooperate with the driven gear 2 , that is, the driving units 5 directly cooperate with the driven gear 2 , so that the driven gear 2 can be directly driven, thereby improving efficiency.

[0026] The driving units 5 in the present application are multiple and can meet various requirements. For example, when a large torque is required, multiple driving units 5 can work simultaneously, and when high-speed rotation is required, only one driving unit 5 can work, which can meet the different requirements of users.

[0027] The driving unit 5 is further described. Specifically, the driving unit 5 includes: A hydraulic motor 501 is installed inside the accommodating cavity 101; The driving gear 502 is installed at the output end of the hydraulic motor 501, and the driving gear 502 is meshed with the driven gear 2, that is, controlled by hydraulic pressure, so as to bear the role of reactive torque, thereby meeting user needs.

[0028] In order to better realize the switching between high torque and high-speed rotation, there are three drive units 5 in the present application, and the angle between any two adjacent drive units 5 is α, one of which is an acute angle, and the remaining two α are obtuse angles. This can better complete the driving, save space inside the shell, and protect the drill rod to a certain extent.

[0029] Specifically, the hydraulic motor 501 in the present application is a low-speed, high-torque hydraulic motor, which can be a low-speed, high-torque Poclain hydraulic motor, so that the torque requirements can be better met. For example, when the present application is working, the maximum working torque (20MPa) needs to reach 37000N*m; the maximum short-time torque (25MPa) needs to reach 46000N*m.

[0030] Similarly, in order to achieve direct drive and stable torque transmission, the diameter of the driving gear 502 is smaller than the diameter of the driven gear 2, which can meet the user's demand for high torque.

[0031] In order to better understand the tonnage changes of the entire device during operation, such as Figure 2 As shown, in the present application, a plurality of hanging weight sensors 8 are installed at the bottom of the shell 1. The hanging weight sensors 8 can better know the overall weight, thereby providing accurate signals for the subsequent pipe processing system.

[0032] In order to facilitate the device to obtain the status of the drill string when working, the present application installs a hoop finder 6 at the bottom of the housing 1, and the hoop finder 6 can detect the position of the coupling, because the oil drill pipe is usually composed of multiple sections of pipe bodies connected by couplings (threaded connections). The hoop finder can quickly locate the position of the coupling, ensure that the connection meets the installation specifications, and avoid the risk of leakage or breakage caused by misalignment or looseness.

[0033] Specifically, Figure 5 As shown, the hoop finder 6 described in the present application includes: A hoop search frame 601 is installed on the top of the housing 1; A plurality of laser sensors 602 are distributed at intervals along the circumference of the hoop frame 601 .

[0034] The present application designs a hoop finder 6, and through the cooperation of multiple laser sensors 602, finds the specific changes in the detection value, thereby knowing the position of the hoop in the drill pipe, and thus knowing the working status of the entire device.

[0035] At the same time, in order to ensure the stable operation of the entire device, the present application also arranges a plurality of fixing seats 7 at intervals at the bottom of the shell 1 to ensure the stability of the entire device.

[0036] Further explanation for this application: The present application adopts Poclain hydraulic motor gear direct drive, that is, the hydraulic motor 501 directly drives the driving gear 502 to move, and then the driving gear 502 directly drives the driven gear 2 to move, which can improve the transmission efficiency and has a simple structure and fewer wearing parts.

[0037] At the same time, the present application is designed according to the position of the driving unit 5, which can save assembly space. At the same time, the present application also adds a hoop finder, which can be used to detect the position of the coupling, so as to better detect the position of the drill rod, thereby better completing the work.

[0038] This application uses three sets of hydraulic motors, which can work simultaneously or individually, with higher working speed and greater torque, which can better meet work needs. Similarly, multiple gravity sensors can provide the load size of the turntable and provide accurate signals for the automated pipe handling system.

[0039] Embodiment 2: Based on the embodiment, Figure 6 As shown, the present application also discloses a hydraulic control system, which specifically includes: the hydraulic rotary plate 9 described in the specific embodiment 1; A plurality of proportional valves 10 are connected to the hydraulic motors 501 of the hydraulic rotary table 9 in a one-to-one correspondence, and the proportional valves 10 are arranged in parallel; A plurality of shuttle valves 11, wherein the shuttle valves 11 are respectively connected to two ends of the hydraulic motor 501; A plurality of one-way valves 12, one end of which is connected to the shuttle valves 11 one by one; The pressure reducing relief valve 13 is communicated with the other end of the one-way valve 12 .

[0040] Among them, the opening pressure of the pressure reducing relief valve 13 is 1.2-3MPa, and the maximum bearing pressure is 8MPa; the present application utilizes a proportional valve to accurately control the power of the hydraulic motor 501. At the same time, the present application is also provided with other valve components, which can realize the simultaneous operation or individual operation of the hydraulic motors.

[0041] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A hydraulic turntable, characterized in that: include: A housing, wherein a housing cavity is provided inside the housing; A driven gear is installed inside the accommodating cavity; A rotating disk is mounted on the top of the driven gear, and the top of the rotating disk extends upward to the top surface of the housing; A combined bearing component is installed at the bottom of the rotating disk, and the combined bearing component is matched with the inner wall of the accommodating cavity; A plurality of driving units are installed in the accommodating cavity at intervals, and the driving units cooperate with the driven gears; The driving unit comprises: A hydraulic motor is installed inside the accommodating cavity; A driving gear is installed at the output end of the hydraulic motor, and the driving gear is meshed with the driven gear.

2. The hydraulic turntable according to claim 1, characterized in that: There are three driving units; the angle between any two adjacent driving units is α, one α is an acute angle, and the remaining two α are obtuse angles.

3. The hydraulic turntable according to claim 2, characterized in that: The hydraulic motor is a low-speed, high-torque hydraulic motor.

4. The hydraulic turntable according to claim 3, characterized in that: The diameter of the driving gear is smaller than the diameter of the driven gear.

5. The hydraulic turntable according to claim 1, characterized in that: A plurality of suspended weight sensors are installed at the bottom of the shell.

6. The hydraulic turntable according to claim 1, characterized in that: A hoop finder is installed at the bottom of the shell.

7. The hydraulic turntable according to claim 6, characterized in that: The hoop finder comprises: A hoop search frame is installed on the top of the shell; A plurality of laser sensors are distributed at intervals along the circumference of the hoop frame.

8. The hydraulic turntable according to claim 1, characterized in that: A plurality of fixing seats are arranged at intervals on the bottom of the shell.

9. A hydraulic control system, characterized in that: include: The hydraulic turntable according to any one of claims 1 to 8; A plurality of proportional valves are connected to the hydraulic motors of the hydraulic rotary table in a one-to-one correspondence, and the proportional valves are arranged in parallel; A plurality of shuttle valves, each of which is connected to two ends of the hydraulic motor; A plurality of one-way valves, one end of which is connected to the shuttle valves one by one; The pressure reducing relief valve is communicated with the other end of the one-way valve.

10. The hydraulic control system according to claim 9, characterized in that: The opening pressure of the pressure reducing relief valve is 1.2-3MPa, and the maximum bearing pressure is 8MPa.

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