Wave-compensated drilling drawworks device

Abstract

The application discloses a wave compensation drilling winch device and belongs to the technical field of marine drilling equipment. The device comprises a winch body, a monitoring unit and a control unit. The winch body comprises a first support, a drum, a steel wire rope, a first driving device and a safety protection device. The free end of the steel wire rope is connected with a dead rope fixer fixed on a derrick after winding through a fixed pulley on a drilling tower crane and a movable pulley on a travelling block. A drill string is connected with the travelling block. The monitoring unit comprises a weight indicator. The control unit is used for calculating an actual drilling pressure value of the drill string according to a detection value of the weight indicator. The control unit can compare the actual drilling pressure value with a set drilling pressure value, and adjust the rotation direction and / or rotation speed of the drum to make the actual drilling pressure value equal to the set drilling pressure value according to a comparison result by controlling the first driving device. The application effectively improves the wave compensation effect, guarantees the smooth drilling operation and has a good application prospect.

Description

Technical Field

[0001] This invention relates to the field of marine drilling equipment technology, and in particular to a wave-compensated drilling winch device. Background Technology

[0002] As land resources become increasingly depleted, human beings are becoming more and more dependent on marine resources. In water depths of 2,000 to 6,000 meters, there are abundant marine mineral resources such as combustible ice, polymetallic nodules, hydrothermal deposits, and cobalt crusts.

[0003] Drilling operations for seabed geological exploration are conducted on offshore drilling vessels. Deep-sea drilling winches, as key components of offshore drilling equipment, undertake important tasks such as ensuring normal drilling, raising and lowering the drill string, and extracting seabed samples. However, during operation, offshore drilling vessels are affected by waves, resulting in six degrees of freedom of swaying motion around their original equilibrium position: pitching, rolling, heave, pitching, rolling, and yaw. In rough sea conditions, the violent movement of the mother ship causes significant changes in drill string depth, and the wire rope is subjected to repeated impacts of strong variable tension. The swaying and heave of the hull cause the riser system and drill string to move up and down, altering the bottom hole pressure. Especially when the drill bit is stuck, it is difficult to quickly remove it, which can easily damage drilling equipment and affect project progress.

[0004] Currently, wave compensation systems mainly employ two methods: active and passive. Passive wave compensation relies on accumulators to absorb the heave energy of the mother ship, requiring no external power supply. However, it suffers from low compensation accuracy, unstable performance, and severe time lag, making it only suitable for environments with favorable sea conditions. Active wave compensation, while capable of outputting control signals to activate hardware for compensation upon detecting drill string heave, suffers from numerous hardware components, time lag, and poor compensation effectiveness. On one hand, the system structure is complex and susceptible to interference from mechanical friction and the characteristics of electronic components, exhibiting severe nonlinearity. On the other hand, due to the large mass and inertia of the drill string, the compensation action occurs only after the load changes, resulting in significant time lag. Summary of the Invention

[0005] The purpose of this invention is to provide a wave-compensating drilling winch device to solve the problems existing in the prior art and improve the wave compensation effect of the winch device.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides a wave-compensated drilling winch device, comprising:

[0008] The winch body includes a first bracket fixed to the hull, a drum rotatably mounted on the first bracket, a steel wire rope partially wound on the drum, a first drive device for driving the drum to rotate, and a safety protection device mounted on the first bracket. The safety protection device is used to brake the rotation of the drum. The free end of the steel wire rope is wound around a fixed pulley on the drilling rig crane and a movable pulley on the traveling trolley before being connected to a dead rope fixing device fixed on the derrick. The drill string is connected to the traveling trolley.

[0009] The monitoring unit includes a weight indicator, which includes a pressure sensor mounted on the dead rope fastener. The pressure sensor is used to detect the tension of the wire rope.

[0010] The control unit is used to calculate the actual drilling pressure value of the drill bit based on the detection value of the weight indicator. The control unit can compare the actual drilling pressure value with the set drilling pressure value, and adjust the direction and / or speed of the drum by controlling the first drive device according to the comparison result so that the actual drilling pressure value is equal to the set drilling pressure value.

[0011] Preferably, the safety protection device includes a brake disc coaxially and fixedly connected to the drum, a safety clamp for clamping the brake disc, and a hydraulic station. The safety clamp is normally closed, and the hydraulic station is used to supply high-pressure oil to the safety clamp so that the safety clamp releases the brake disc. The control unit can control the operation of the hydraulic station.

[0012] Preferably, the winch body further includes a rope-laying mechanism, which includes a second bracket fixedly connected to the first bracket, a screw rotatably mounted on the second bracket, a second drive device for driving the screw to rotate, a guide rod fixedly mounted on the second bracket, and a third bracket threadedly connected to the screw. The third bracket is slidably sleeved on the guide rod, and the wire rope is slidably engaged with the third bracket. The control unit can control the operation of the second drive device. The third bracket is provided with a first pulley and a second pulley. The axial direction of the guide rod, the axial direction of the screw, the axial direction of the first pulley, and the axial direction of the second pulley are respectively parallel to the axial direction of the drum. The wire rope is wound around the first pulley and the second pulley.

[0013] Preferably, the monitoring unit further includes two tension sensors spaced apart along the axial direction of the drum on the third support. The tension sensors are signal-connected to the control unit. The interval between the two tension sensors is equal to the diameter of the wire rope. The first pulley and the second pulley are closer to the drum than either of the tension sensors. After the wire rope winds around the first pulley and the second pulley, it passes through the interval between the two tension sensors.

[0014] Preferably, the control unit includes a PLC programmable controller, a CPU, a touch screen, and a data storage device. The weight indicator, the tension sensor, the PLC programmable controller, the touch screen, and the data storage device are respectively connected to the CPU via signals. The first drive device, the safety protection device, and the second drive device are respectively connected to the PLC programmable controller via signals.

[0015] Preferably, the control unit further includes a multi-function joystick that is signal-connected to the CPU.

[0016] Preferably, the CPU and the touch screen are located in the electrical control room of the ship's hull, while the PLC programmable controller, the touch screen, and the multi-functional operating lever are respectively located in the driller's cabin of the ship's hull.

[0017] Preferably, the surface of the drum is provided with an anti-corrosion coating, the material of which is epoxy zinc-rich coating; and the drum is provided with a Ribas rope groove.

[0018] Preferably, both the first drive device and the second drive device are permanent magnet synchronous motors.

[0019] Preferably, the monitoring unit further includes a speed sensor for detecting the rotational speed of the output shaft of the first drive device.

[0020] The present invention achieves the following technical effects compared to the prior art:

[0021] The wave-compensated drilling winch device of the present invention obtains the tension of the wire rope by setting a weight indicator in the monitoring unit. The control unit calculates the actual drilling pressure value of the drill string in real time based on the tension of the wire rope, and compares the actual drilling pressure value with the set drilling pressure value. Based on the comparison result, the control unit adjusts the drum direction and / or speed by controlling the first drive device to make the actual drilling pressure value equal to the set drilling pressure value. Compared with the problems of low accuracy of passive wave compensation and lag and nonlinearity of active wave compensation in the prior art, this real-time adjustment method can more effectively compensate for changes in drill string depth and wire rope tension caused by waves, thereby improving the wave compensation effect of the winch device, reducing the damage to drilling equipment caused by waves, and ensuring the smooth progress of drilling operations.

[0022] Furthermore, the safety protection device includes a brake disc coaxially fixed to the drum, a normally closed safety clamp, and a hydraulic station. The control unit can control the operation of the hydraulic station. During normal operation, the hydraulic station supplies high-pressure oil to the safety clamp to release the brake disc, allowing the drum to rotate normally. In case of an abnormal situation (such as a sudden power outage where the hydraulic station and control system cannot operate), the safety clamp uses the tension of a disc spring within its body to clamp the brake disc, braking the rotation of the drum. This provides safety protection for the winch device, preventing accidents caused by equipment failure or abnormal conditions and ensuring the safety of drilling operations.

[0023] Furthermore, the rope-laying mechanism includes a second bracket, a screw, a second drive device, a guide rod, and a third bracket. The control unit can control the operation of the second drive device. The second drive device drives the screw to rotate, causing the third bracket, which is threadedly connected to the screw and slidably fitted onto the guide rod, to move along the guide rod. The third bracket, through a first pulley and a second pulley, drives the wire rope to move, thereby achieving an orderly arrangement of the wire rope on the drum, avoiding tangled wire rope on the drum, improving the service life of the wire rope and the working efficiency of the winch device. Meanwhile, the rope-laying mechanism is also equipped with a tension sensor. The tension sensor detects the tension of the wire rope and is connected to the control unit signal, which can monitor the force on the wire rope in real time. Since there is an error between the movement of the third support in the rope-laying mechanism and the rotation of the drum, when there is a significant deviation between the movement of the wire rope by the rope-laying mechanism and the Libas groove on the drum, the detection value of one of the tension sensors will be greater than the set value. Since the two tension sensors are distributed at intervals along the axial direction of the drum, the direction in which the tension sensor detects a value greater than the set value indicates that the direction of the third support toward that tension sensor has deviated from the Libas groove. The control unit will control the rotation speed of the second drive device to make some compensation in the direction pointed to by the tension sensor whose detection value is greater than the set value, until the detection values ​​of both tension sensors are less than the set value.

[0024] Furthermore, the control unit includes a PLC programmable controller, a CPU, a touch screen, and data storage devices. The CPU and touch screen are located in the ship's electrical control room, while the PLC, touch screen, and multi-function control lever are located in the driller's cabin. This arrangement allows operators to conveniently operate and control the winch device from the driller's cabin via the touch screen and multi-function control lever. Simultaneously, the CPU in the electrical control room processes and stores data, ensuring system stability and reliability. In addition, the multi-function control lever further enriches the operating methods, improving operational convenience and flexibility. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the wave compensation drilling winch device of the present invention;

[0027] Figure 2 This is a partial structural diagram of the wave-compensated drilling winch device of the present invention. Figure 1 ;

[0028] Figure 3 This is a partial structural diagram of the wave-compensated drilling winch device of the present invention. Figure 2 ;

[0029] Figure 4 This is a schematic diagram of the rope-laying mechanism in this invention;

[0030] In the diagram: 1. Winch body; 101. First drive unit; 102. Drum; 103. Brake disc; 104. Safety clamp; 105. Wire rope; 106. First support; 107. Base; 2. Rope winding mechanism; 201. Second drive unit; 202. Screw; 203. Guide rod; 204. Tension sensor; 205. Third support; 206. Second support; 207. First pulley; 208. Second pulley; 3. Hydraulic station; 4. Control unit. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] The purpose of this invention is to provide a wave-compensating drilling winch device to solve the problems existing in the prior art and improve the wave compensation effect of the winch device.

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 4 As shown, this embodiment provides a wave-compensated drilling winch device, including:

[0035] The winch body 1 includes a first support 106 fixed on the hull, a drum 102 rotatably mounted on the first support 106, a steel wire rope 105 partially wound on the drum 102, a first drive device 101 for driving the drum 102 to rotate, and a safety protection device mounted on the first support 106. The safety protection device is used to brake the rotation of the drum 102. The free end of the steel wire rope 105 is wound around the fixed pulley on the drilling tower crane and the movable pulley on the traveling trolley and then connected to the dead rope fixing device fixed on the derrick. The drill string is connected to the traveling trolley.

[0036] The monitoring unit includes a weight indicator, which includes a pressure sensor mounted on the dead rope fastener. The pressure sensor is used to detect the tension of the wire rope 105.

[0037] Control unit 4 is used to calculate the actual drilling pressure value of the drill bit based on the detection value of the weight indicator. Control unit 4 can compare the actual drilling pressure value with the set drilling pressure value, and adjust the direction and / or speed of the drum 102 by controlling the first drive device 101 to make the actual drilling pressure value equal to the set drilling pressure value.

[0038] In this embodiment, the wave-compensated drilling winch device obtains the tension of the wire rope 105 using a weight indicator. The control unit subtracts the tension of the wire rope from the total weight of the drill string to obtain the actual drilling pressure value. The control unit calculates the actual drilling pressure value in real time and compares it with the set drilling pressure value. Based on the comparison result, the control unit adjusts the direction and / or speed of the drum 102 by controlling the first drive device 101 to make the actual drilling pressure value equal to the set drilling pressure value. Specifically, when the actual drilling pressure value is less than the set drilling pressure value, the control unit 4 increases the speed of the drum 102 by controlling the first drive device 101 until the actual drilling pressure value equals the set drilling pressure value. When the actual drilling pressure is greater than the set drilling pressure, the control unit 4 decreases the speed of the drum 102 or reverses the drum 102 by controlling the first drive device 101 until the actual drilling pressure value equals the set drilling pressure value. Compared with existing technologies where passive wave compensation has low accuracy and active wave compensation suffers from lag and nonlinearity, this real-time control and adjustment method can more effectively compensate for changes in drill string depth and wire rope tension caused by waves. This improves the wave compensation effect of the winch device, reduces damage to drilling equipment caused by waves, and ensures the smooth progress of drilling operations.

[0039] In this embodiment, a base 107 is also provided at the bottom end of the first bracket 106, and the base 107 is fixedly connected to the hull.

[0040] In the optional embodiments of this invention, a preferred safety protection device includes a brake disc 103 coaxially and fixedly connected to the drum 102, a safety clamp 104 for clamping the brake disc 103, and a hydraulic station 3. The safety clamp 104 is normally closed, which can quickly clamp the brake disc 103 in abnormal conditions. The hydraulic station 3 provides high-pressure oil to the safety clamp 104 to release the brake disc 103. The control unit 4 can control the operation of the hydraulic station 3. During normal operation, the hydraulic station 3 provides high-pressure oil to the safety clamp 104 to release the brake disc 103, and the drum 102 can rotate normally. When an abnormal situation occurs, such as a sudden power outage of the winch or the drilling rig not working, the safety clamp 104 will quickly clamp the brake disc 103 under the action of an internal disc spring, braking the rotation of the drum 102, thereby achieving safety protection for the winch device, avoiding safety accidents caused by equipment failure or abnormal conditions, and ensuring the safety of drilling operations.

[0041] In this embodiment, there are two safety clamps 104 and two brake discs 103, and the safety clamps 104 and the brake discs 103 correspond one-to-one.

[0042] In an optional embodiment, more preferably, the winch body 1 further includes a rope-laying mechanism 2. The rope-laying mechanism 2 includes a second bracket 206 fixedly connected to the first bracket 106, a screw 202 rotatably mounted on the second bracket 206, a second drive device 201 for driving the screw 202 to rotate, a guide rod 203 fixedly mounted on the second bracket 206, and a third bracket 205 threadedly connected to the screw 202. The third bracket 205 is slidably sleeved on the guide rod 203, and the wire rope 105 is slidably engaged with the third bracket 205. The control unit 4 can control the operation of the second drive device 201. The third bracket 205 is provided with a first pulley 207 and a second pulley 208. The axial direction of the guide rod 203, the axial direction of the screw 202, the axial direction of the first pulley 207, and the axial direction of the second pulley 208 are parallel to the axial direction of the drum 102, and the wire rope 105 is wound around the first pulley 207 and the second pulley 208.

[0043] In an optional embodiment, more preferably, the monitoring unit further includes two tension sensors 204 spaced apart along the axial direction of the drum 102 on the third bracket 205. Both tension sensors 204 are signal-connected to the control unit 4. The interval between the two tension sensors 204 is equal to the diameter of the wire rope 105. The first pulley 207 and the second pulley 208 are closer to the drum 102 than either tension sensor. After the wire rope 105 winds around the first pulley 207 and the second pulley 208, it passes through the interval between the two tension sensors 204.

[0044] The specific working principle of the rope-laying mechanism 2 is as follows:

[0045] The second drive device 201 drives the screw 202 to rotate, causing the third bracket 205, which is threadedly connected to the screw 202 and slidably sleeved on the guide rod 203, to move along the guide rod 203. The third bracket 205 drives the wire rope 105 to reciprocate along the axis of the drum 102 through the first pulley 207 and the second pulley 208, thereby achieving an orderly arrangement of the wire rope 105 on the drum 102 when winding and unwinding the wire rope 105, avoiding the tangled phenomenon of the wire rope 105 on the drum 102, improving the service life of the wire rope 105 and the working efficiency of the winch device.

[0046] However, due to the error between the movement of the third support 205 in the rope-laying mechanism 2 and the rotation of the drum 102, when the movement of the wire rope 105 by the rope-laying mechanism 2 deviates significantly from the Ribas groove on the drum 102, the detection value of one of the tension sensors 204 will be greater than the set value (this set value is pre-programmed in the control unit 4). Since the two tension sensors 204 are spaced apart along the axial direction of the drum 102, the tension sensor 204 whose detection value is greater than the set value indicates that the direction of the third support 205 toward that tension sensor 204 has deviated from the Ribas groove. Assuming the axial direction of the drum 102 is taken as the left-right direction, the two tension sensors 204 are distributed one on the left and one on the right. If the detection value of the tension sensor 204 on the left is greater than the set value, it indicates that the third support 205 has shifted to the right relative to the drum 102. In this case, the control unit 4 controls the second drive device 201 to slow down the rightward movement of the third support 205 to compensate for the shift to the left, until the detection values ​​of both tension sensors 204 are less than the set value. Similarly, if the detection value of the tension sensor 204 on the right is greater than the set value, it indicates that the third support 205 has shifted to the left relative to the drum 102. In this case, the control unit 4 controls the second drive device 201 to slow down the leftward movement of the third support 205 to compensate for the shift to the right, until the detection values ​​of both tension sensors 204 are less than the set value. In other words, the control unit 4 controls the rotation speed of the second drive device 201 to cause the third support 205 to compensate in the direction indicated by the tension sensor 204 with a detection value greater than the set value, until the detection values ​​of both tension sensors 204 are less than the set value.

[0047] In this embodiment, the rope arranging mechanism 2 can not only arrange the wire rope 105 in an orderly manner, but also automatically eliminate the deviation generated during the rope arranging process by controlling the second drive device 201 through the control unit 4 based on the feedback from the two tension sensors 204, thus ensuring that the rope arranging work can be carried out stably.

[0048] In the optional schemes of this embodiment, the control unit 4 preferably includes a PLC programmable controller, a CPU, a touch screen, and a data storage device. The weight indicator, tension sensor 204, PLC programmable controller, touch screen, and data storage device are respectively connected to the CPU via signals. The first drive device 101, the safety protection device, and the second drive device 201 are respectively connected to the PLC programmable controller via signals.

[0049] In the optional embodiments of this example, the control unit 4 is preferably further provided with a multi-function joystick connected to the CPU signal. The multi-function joystick further enriches the operation methods and improves the convenience and flexibility of operation.

[0050] In the optional schemes of this embodiment, it is more preferred that the CPU and touch screen are located in the electrical control room of the ship, and the PLC programmable controller, touch screen and multi-function control lever are located in the driller's room of the ship. This allows the operator to conveniently operate and control the winch device in the driller's room through the touch screen and multi-function control lever. At the same time, the CPU in the electrical control room can process and store data, ensuring the stability and reliability of the system.

[0051] In the optional solutions of this embodiment, it is more preferred that the surface of the drum 102 is provided with an anti-corrosion coating. The anti-corrosion coating material is epoxy zinc-rich coating, which can effectively prevent the drum 102 from being damaged due to seawater corrosion and other reasons, and extend the service life of the drum 102. The drum 102 is provided with a Ribas rope groove, which can make the wire rope 105 winding on the drum 102 more tightly and orderly, reduce the wear between the wire ropes 105, and further improve the working performance and reliability of the winch device.

[0052] In the optional solutions of this embodiment, it is more preferred that both the first drive device 101 and the second drive device 201 adopt permanent magnet synchronous motors. Permanent magnet synchronous motors have the advantages of high efficiency, energy saving, high power factor and good speed regulation performance. Compared with traditional drive devices, they can improve the working efficiency of the winch device, reduce energy consumption and reduce operating costs. Neither the first drive device 101 nor the second drive device 201 is equipped with a gearbox, which is simple in structure and does not require a speed change structure, thus realizing gearless transmission.

[0053] In one optional embodiment, the monitoring unit further includes a speed sensor for detecting the rotational speed of the output shaft of the first drive device. The speed sensor is connected to the CPU signal in the control unit and can directly feed back the rotational speed of the output shaft of the first drive device to the control unit.

[0054] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A wave-compensated drilling drawworks apparatus, characterized by, The invention relates to a drilling rig, comprising: a winch body, the winch body comprising a first support fixed on a hull, a drum rotatably mounted on the first support, a steel wire rope partially wound on the drum, a first driving device for driving the drum to rotate, and a safety protection device mounted on the first support, the safety protection device being used for braking the rotation of the drum, a free end of the steel wire rope being connected with a dead rope fixer fixed on a derrick after winding over a fixed pulley on a drilling tower crown block and a movable pulley on a traveling block, a drill string being connected with the traveling block; a monitoring unit, the monitoring unit comprising a weight indicator, the weight indicator comprising a pressure sensor arranged on the dead rope fixer, the pressure sensor being used for detecting the tension of the steel wire rope; a control unit, the control unit being used for calculating an actual drilling pressure value of the drill string according to the detection value of the weight indicator, the control unit being capable of comparing the actual drilling pressure value with a set drilling pressure value, and adjusting the rotation direction and / or rotation speed of the drum by controlling the first driving device according to the comparison result so as to make the actual drilling pressure value equal to the set drilling pressure value; the winch body further comprises a rope arranging mechanism, the rope arranging mechanism comprising a second support fixedly connected with the first support, a screw rotatably mounted on the second support, a second driving device for driving the screw to rotate, a guide rod fixed on the second support, and a third support threadedly connected with the screw, and the third support being slidably sleeved on the guide rod, the steel wire rope being in sliding fit with the third support; the control unit is capable of controlling the operation of the second driving device; the third support is provided with a first pulley and a second pulley, the axial direction of the guide rod, the axial direction of the screw, the axial direction of the first pulley and the axial direction of the second pulley are respectively parallel to the axial direction of the drum, and the steel wire rope winds over the first pulley and the second pulley.

2. A wave-compensated drilling drawworks apparatus as defined in claim 1, wherein: The safety protection device comprises a brake disc coaxial with the drum and fixedly connected with the drum, a safety clamp for clamping the brake disc, and a hydraulic station, the safety clamp being normally closed, and the hydraulic station being used for providing high-pressure oil to the safety clamp so as to make the safety clamp release the brake disc; the control unit is capable of controlling the operation of the hydraulic station.

3. The wave-compensated drilling drawworks apparatus of claim 1, wherein: The monitoring unit further comprises two tension sensors arranged on the third support in the axial direction of the drum, the tension sensors being signal connected with the control unit, the interval between the two tension sensors being equal to the diameter of the steel wire rope, the first pulley and the second pulley being closer to the drum than any one of the tension sensors, and the steel wire rope passing through the interval between the two tension sensors after winding over the first pulley and the second pulley.

4. A wave-compensated drawworks device according to claim 3, characterized in that: The control unit comprises a PLC programmable controller, a CPU, a touch screen, and a data storage device, the weight indicator, the tension sensors, the PLC programmable controller, the touch screen, and the data storage device being respectively signal connected with the CPU, and the first driving device, the safety protection device, and the second driving device being respectively signal connected with the PLC programmable controller.

5. A wave-compensated drawworks device according to claim 4, characterized in that: The control unit further comprises a multifunctional operating lever connected with the CPU.

6. A wave-compensated drilling drawworks apparatus as defined in claim 5, wherein: The CPU and the touch screen are arranged in an electric control room of the hull, and the PLC, the touch screen and the multifunctional operating lever are arranged in a driller's cabin of the hull.

7. The wave-compensated drilling drawworks apparatus of claim 1, wherein: The surface of the winding drum is provided with an anticorrosive coating, and the material of the anticorrosive coating is epoxy zinc-rich paint; and a RIBAS rope groove is arranged on the winding drum.

8. The wave-compensated drilling drawworks apparatus of claim 1, wherein: The first driving device and the second driving device are both permanent magnet synchronous motors.

9. The wave-compensated drilling drawworks apparatus of claim 1, wherein: The monitoring unit further comprises a rotating speed sensor for detecting the rotating speed of the output shaft of the first driving device.

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