Drilling control method of rotary drilling main machine, drilling system of rotary drilling main machine and rotary drilling main machine

Abstract

The invention discloses a drilling control method of a rotary excavating main machine, a drilling system of the rotary excavating main machine and the rotary excavating main machine, and relates to the field of rotary excavating equipment, the drilling control method of the rotary excavating main machine is used for controlling the drilling system of the rotary excavating main machine to move up and down, and the drilling system of the rotary excavating main machine comprises a power head body, a pressurizing electric cylinder, a main winch and a multi-stage telescopic drill rod. Comprising the steps that a main winch is controlled to lift a drill rod, and a pressurizing electric cylinder synchronously retracts; controlling a main winch to lower a drill rod to enable a drill bit to contact with the hole bottom; butt joint of the corresponding pressurizing points on the drill rod is controlled; the power head body is controlled to be started, the pressurizing electric cylinder is controlled to stretch out to press the power head body, the main winch synchronously lowers the drill rod, and a second round of drilling action is completed; and the lifting and lowering actions are repeated until drilling is completed, and multiple rounds of drilling actions are completed. Only the extension length of the pressurizing electric cylinder needs to be obtained, the structure is simplified, the number of sensors is reduced, calculation and control methods are simplified, and equipment accuracy and control convenience are improved.

Description

Technical Field

[0001] This invention relates to the field of rotary drilling equipment, and in particular to a method for controlling the drilling of a rotary drilling rig. Furthermore, this invention also relates to a rotary drilling rig drilling system and a rotary drilling rig that utilizes the aforementioned method for controlling the drilling of a rotary drilling rig. Background Technology

[0002] Rotary drilling rigs are used for drilling operations. Currently, the rotation and vertical displacement of the power head of a rotary drilling rig are generally driven by hydraulic motors and cylinders. While hydraulic motors and cylinders are suitable for conventional construction, they require assistance from other devices in certain aspects. Hydraulic motors and cylinders have precision issues. For example, the speed control of a hydraulic motor must be achieved through sensor sensing and continuous adjustment of oil pressure, which inevitably introduces some error. This error poses control problems for achieving automation and unmanned operation.

[0003] When calculating automatic pressurization during construction, it is necessary to combine the main winch length detection controller, the up and down position sensors of the power head, and the mast position sensor. This approach cannot achieve precise control and requires the combined action of multiple sensors, complicating the calculation and control process.

[0004] Furthermore, long auger drill bits have poor adaptability to drilling, lifting, and scraping. The lifting and rotation speeds cannot be controlled and matched to a constant ratio, necessitating the use of multi-claw rotary scrapers. These scrapers rely on the rotating blades to drive the scraper upwards. However, this passive scraping method often results in the blades and scraper being crushed due to angle issues, and incomplete scraping, leaving a significant amount of soil residue on the blades. Different auger diameters and pitches require different scraper lengths and claw numbers; sometimes, multiple augers are needed when multiple augers are used.

[0005] Therefore, how to provide a precise and simplified control method for rotary drilling rig drilling is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a rotary drilling rig drilling control method that achieves precision control through a pressure-pressurized electric cylinder, completing the calculation of construction depth and automatic pressure-pressurization position matching calculation. Another purpose of this invention is to provide a rotary drilling rig drilling system and a rotary drilling rig that apply the above-mentioned rotary drilling rig drilling control method.

[0007] To solve the above-mentioned technical problems, the present invention provides a rotary drilling rig drilling control method for controlling the up-and-down movement of the rotary drilling rig drilling system. The rotary drilling rig drilling system includes a power head body, a pressurized electric cylinder, a main winch, and a multi-stage telescopic drill rod, and includes the following steps:

[0008] Control the main winch to lower the drill rod so that the drill bit below the drill rod contacts the ground;

[0009] Control the power head body to connect with the corresponding pressure point on the drill pipe;

[0010] The power head body is started and the pressurizing electric cylinder is extended and pressed down on the power head body. The main winch simultaneously lowers the drill rod to complete the first round of drilling.

[0011] The main winch is controlled to lift the drill rod, and the pressurizing electric cylinder retracts synchronously.

[0012] Control the main winch to lower the drill rod so that the drill bit contacts the bottom of the hole;

[0013] Control the connection of the corresponding pressure points on the drill pipe;

[0014] The power head body is started and the pressurized electric cylinder is extended and pressed down on the power head body. The main winch simultaneously lowers the drill rod to complete the second round of drilling.

[0015] Repeat the above lifting and lowering actions until drilling is complete, completing multiple rounds of drilling.

[0016] Preferably, controlling the connection of the corresponding pressure point on the drill pipe includes the following steps:

[0017] Obtain the drilling depth;

[0018] Select a suitable pressure point on the drill pipe according to the drilling depth;

[0019] Control the extension and retraction of the pressurizing electric cylinder to complete the docking at the appropriate pressurization point.

[0020] Preferably, obtaining the drilling depth includes the following steps:

[0021] Obtain the forward extension length of the pressurizing electric cylinder when the pressurization point is connected before each round of drilling;

[0022] Obtain the rear extension length of the pressurized electric cylinder when the same drilling action is completed;

[0023] The drilling length for each round is obtained by subtracting the forward extension length from the rear extension length for each round.

[0024] The drilling depth is obtained by summing the drilling lengths of each round.

[0025] Preferably, selecting a suitable pressure point on the drill pipe based on the drilling depth includes the following steps:

[0026] Define the preset depth corresponding to each pressurization point;

[0027] The preset depths of the pressurization points arranged from top to bottom are sequentially arranged to form multiple range intervals, and the endpoint values ​​of the range intervals are the preset depths of two adjacent pressurization points;

[0028] Determine the range within which the drilling depth falls, and select the corresponding pressurization point at the upper endpoint within this range as the appropriate pressurization point.

[0029] Preferably, controlling the extension and retraction of the pressurizing electric cylinder to complete the docking at the appropriate pressurization point includes the following steps:

[0030] The protrusion amount of the pressurized electric cylinder is calculated using a formula.

[0031] The formula is: h = H - L + h';

[0032] Where h is the docking extension amount, H is the drilling depth, L is the preset depth corresponding to the appropriate pressure point, and h' is the forward extension length.

[0033] Preferably, the step of controlling the main winch to lift the drill rod and the pressurized electric cylinder to retract synchronously includes the following steps:

[0034] An extension rod with a brush head extends outward, and the brush head is inserted between the blades of the drill bit. While the drill bit is being lifted, the power head body drives the drill bit to rotate, and the blade pitch is equal to the ratio of the lifting distance per unit time to the number of rotations per unit time. The power head body includes a motor.

[0035] This invention provides a rotary drilling rig drilling system, which applies the rotary drilling rig drilling control method as described in any one of the above claims, including a power head body, a pressure cylinder, a main winch, and a multi-stage telescopic drill rod. The main winch hoists the top end of the drill rod, the bottom end of the drill rod is connected to the drill bit, the power head body is connected to the drill rod, and the bottom end of the pressure cylinder is connected to the power head body.

[0036] Preferably, the drill pipe includes a first rod, a second rod, and a third rod that are sequentially mounted. The first rod has three pressure points, and the second and third rods have four pressure points.

[0037] Preferably, the device further includes an extension rod with a brush head at its head, the extension rod being capable of inserting the brush head between the blades of the drill bit, and the power head body including a motor.

[0038] The present invention provides a rotary drilling rig, including the rotary drilling rig drilling system as described in any one of the above claims.

[0039] This invention provides a rotary drilling rig drilling control method for controlling the vertical movement of the rotary drilling rig system. The rotary drilling rig system includes a power head body, a pressure cylinder, a main winch, and a multi-stage telescopic drill rod. The method includes the following steps: controlling the main winch to lower the drill rod so that the drill bit below the drill rod contacts the ground; controlling the power head body to align with the corresponding pressure point on the drill rod; controlling the power head body to start and controlling the pressure cylinder to extend and press down the power head body, while the main winch simultaneously lowers the drill rod, completing the first round of drilling; controlling the main winch to raise the drill rod, while the pressure cylinder simultaneously retracts; controlling the main winch to lower the drill rod so that the drill bit contacts the bottom of the hole; controlling the corresponding pressure point on the drill rod to align; controlling the power head body to start and controlling the pressure cylinder to extend and press down the power head body, while the main winch simultaneously lowers the drill rod, completing the second round of drilling; repeating the above raising and lowering actions until drilling is completed, thus completing multiple rounds of drilling.

[0040] During operation, a pressure-pressurizing electric cylinder replaces the hydraulic cylinder in existing technology, achieving precise control without the need for frequent oil pressure adjustments, reducing errors, and completing the calculation of construction depth and automatic pressure-pressurizing position matching. Only the extension length of the pressure-pressurizing electric cylinder needs to be obtained, simplifying the structure, reducing the number of sensors, simplifying calculation and control methods, and improving equipment accuracy and ease of control.

[0041] The present invention also provides a rotary drilling rig drilling system and a rotary drilling rig that apply the above-mentioned rotary drilling rig drilling control method. Since the above-mentioned rotary drilling rig drilling control method has the above-mentioned technical effects, the above-mentioned rotary drilling rig drilling system and rotary drilling rig should also have the same technical effects, and will not be described in detail here. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of a specific embodiment of the rotary drilling rig provided by the present invention.

[0043] Figure 2 A schematic diagram illustrating the working process of a specific embodiment of the rotary drilling rig provided by the present invention;

[0044] Figure 3 A schematic diagram of drill rod dimensions for a specific embodiment of the rotary drilling rig provided by the present invention;

[0045] Figure 4 This is a schematic diagram of the extension rod in a specific embodiment of the rotary drilling rig provided by the present invention.

[0046] Among them, 1-power head body; 2-pressurized electric cylinder; 3-drill rod; 4-drill bit; 5-blade; 6-extend rod; 7-brush head. Detailed Implementation

[0047] The core of this invention is to provide a rotary drilling rig drilling control method, which achieves precision control through a pressure-pressurized electric cylinder, completing the calculation of construction depth and automatic pressure-pressurization position matching calculation. Another core aspect of this invention is to provide a rotary drilling rig drilling system and a rotary drilling rig that apply the above-mentioned rotary drilling rig drilling control method.

[0048] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a specific embodiment of the rotary drilling rig provided by the present invention. Figure 2 This is a schematic diagram illustrating the working process of a specific embodiment of the rotary drilling rig provided by the present invention.

[0050] This invention provides a rotary drilling rig control method for controlling the vertical movement of the rotary drilling rig system. The rotary drilling rig system includes a power head body 1, a pressure cylinder 2, a main winch, and a multi-stage telescopic drill rod 3. The main winch suspends the top of the drill rod 3, and the bottom of the drill rod 3 is connected to the drill bit 4. The power head body 1 is connected to the drill rod 3, and the bottom of the pressure cylinder 2 is connected to the power head body 1. The main winch controls the vertical movement of the drill rod 3 during non-drilling operations. The drill bit 4 at the lower end of the drill rod 3 performs the drilling work. The power head body 1 provides power for the rotation of the drill bit 4. In this specific embodiment, the power head body 1 is driven by a motor, which, in conjunction with a reducer, drives the drill bit 4 to rotate. During drilling, the pressure cylinder 2 extends and presses down on the power head body 1, providing drilling power.

[0051] The control method includes the following steps:

[0052] Control the main winch to lower the drill rod 3 so that the drill bit 4 below the drill rod 3 contacts the ground;

[0053] Control the corresponding pressure point on the drill pipe 3 connected to the power head body 1;

[0054] The power head body 1 is started, driving the drill bit 4 to rotate, and the pressure cylinder 2 is extended to press down the power head body 1 to provide drilling pressure. The main winch synchronously lowers the drill rod 3 to complete the first round of drilling.

[0055] The main winch is controlled to lift the drill rod 3, and the pressure cylinder 2 retracts synchronously to perform the soil-throwing action.

[0056] Control the main winch to lower the drill rod 3 again, so that the drill bit 4 contacts the bottom of the hole;

[0057] Connect the new corresponding pressure point on drill pipe 3;

[0058] The power head body 1 is started, driving the drill bit 4 to rotate, and the pressure cylinder 2 is extended to press down the power head body 1 to provide drilling pressure. The main winch synchronously lowers the drill rod 3 to complete the second round of drilling.

[0059] Repeat the above lifting and lowering actions until drilling is complete, completing multiple rounds of drilling.

[0060] In actual operation, drill rod 3 is a multi-stage telescopic rod. At the beginning of drilling, the power head body 1 connects to the lowest pressure point of the outer rod, and the pressure cylinder 2 extends to apply force to the power head body 1, thereby applying downward pressure to drill rod 3. After drilling to a certain depth, the lower end of drill rod 3 will extend into the borehole, and at the same time, the pressure cylinder 2 connects to the pressure point above the outer rod. This process is repeated until the pressure cylinder 2 connects to the highest pressure point of the outer rod. After completing this round of drilling and pressure application, the length of the outer rod is no longer sufficient to extend into the borehole to allow the drill bit 4 to contact the bottom of the hole. Therefore, the inner rod inside the outer rod extends out. During subsequent pressure application, the power head body 1 continues to contact and apply pressure to the highest pressure point of the outer rod. The lower end of the outer rod connects to each pressure point on the inner rod in sequence. The pressure cylinder 2 drives the power head body 1 and the outer rod to move synchronously, so that the lower end of the outer rod finds a suitable pressure point on the inner rod. The process of connecting the outer rod with the pressure point on the inner rod is the appropriate pressure point connection step, which extends the length of drill rod 3 and matches a deeper drilling depth.

[0061] During operation, a pressure-pressurizing electric cylinder replaces the hydraulic cylinder in existing technology, achieving precise control without the need for frequent oil pressure adjustments, reducing errors, and completing the calculation of construction depth and automatic pressure-pressurizing position matching. Only the extension length of the pressure-pressurizing electric cylinder needs to be obtained, simplifying the structure, reducing the number of sensors, simplifying calculation and control methods, and improving equipment accuracy and ease of control.

[0062] Additionally, while soft ground conditions are indeed possible, the ground pressure of the rotary drilling rig is not significant. If the ground is particularly soft, a steel plate is typically laid on the ground, and the rotary drilling rig presses the steel plate on top before drilling. In this case, some changes in the ground surface will not significantly affect the accuracy of the total depth; the total depth and pressurized depth are generally within the preset range.

[0063] Furthermore, regarding the depth at the bottom of the hole, the calculated depth can be recorded when preparing to lift the drill bit. After lifting, the next lowering depth is the recorded depth, allowing the drill bit to return to the previous depth before starting a new round of calculations. More importantly, the industry's requirements for depth precision are not affected by the softness or unevenness of the hole bottom. "More precise" is a relative concept, meaning more precise than existing control methods. Using an electric cylinder to improve precision primarily ensures more accurate lifting and lowering distances each time, preventing excessive accumulation. It also facilitates direct linkage control with the power head; circuit-controlled linkage is convenient and accurate. In other words, the precise lowering distance is derived from the previously recorded depth data. A lowering depth identical to the previous drilling depth indicates precise lowering, ensuring the drill bit contacts the bottom of the hole, avoiding the influence of the actual hole bottom condition on the depth.

[0064] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the drill rod dimensions for a specific embodiment of the rotary drilling rig provided by the present invention.

[0065] Furthermore, controlling the connection of the corresponding pressure points on drill pipe 3 includes the following steps:

[0066] Obtain the drilling depth;

[0067] Select the appropriate pressure point on drill pipe 3 according to the drilling depth;

[0068] Control the extension and retraction of the pressure cylinder 2 to complete the docking at the appropriate pressure point. The appropriate pressure point is precisely matched by the drilling depth to avoid the situation where the pressure position is not accurately matched.

[0069] Obtaining the drilling depth includes the following steps:

[0070] Obtain the forward extension length of the pressure electric cylinder 2 when the pressure point is connected before each round of drilling;

[0071] Obtain the rear extension length of the pressurized electric cylinder 2 when the same drilling action is completed;

[0072] The drilling length for each round is obtained by subtracting the forward extension length from the rear extension length for each round.

[0073] The drilling depth is obtained by summing the drilling length of each round.

[0074] Excluding interference from the main winch, the total drilling depth can be obtained by subtracting the forward extension length from the rear extension length during each drilling cycle and summing the drilling lengths of each cycle.

[0075] Furthermore, selecting a suitable pressure point on drill pipe 3 based on the drilling depth includes the following steps:

[0076] Define the preset depth corresponding to each pressurization point;

[0077] The preset depths of each pressurization point arranged from top to bottom are sequentially arranged to form multiple range intervals, and the endpoint values ​​of the range intervals are the preset depths of two adjacent pressurization points.

[0078] Determine the range of drilling depth and select the corresponding pressurization point at the upper endpoint of this range as the appropriate pressurization point.

[0079] Controlling the extension and retraction of the pressurizing electric cylinder 2 to complete the docking at the appropriate pressurization point includes the following steps:

[0080] The extension amount of the pressurized electric cylinder 2 is calculated using a formula.

[0081] The formula is: h = H - L + h';

[0082] Where h is the docking extension amount, H is the drilling depth, L is the preset depth corresponding to the appropriate pressure point, and h' is the forward extension length.

[0083] In this embodiment, the drill rod 3 includes a first rod, a second rod, and a third rod that are sequentially mounted. The first rod has three pressure points. The first rod, the second rod, and the third rod are arranged from top to bottom. The second rod and the third rod have four pressure points.

[0084] After the three sections of the rod are fully extended, the pressure points are arranged in order from top to bottom. On the first rod, the pressure points are the first, second, and third from top to bottom. On the second rod, the pressure points are the first, second, third, and fourth from top to bottom. On the third rod, the pressure points are the first, second, third, and fourth from top to bottom.

[0085] Specifically, A1 is the distance between the second and third pressure points of the first rod, and A2 is the distance between the first and third pressure points of the first rod. 'a' is the distance from the third pressure point of the first rod to the end face of the first rod. During the extension of the second rod, when the lower end of the first rod aligns with the fourth pressure point of the second rod, B1 is the distance between the first and fourth pressure points of the first rod and the second rod; when the lower end of the first rod aligns with the third pressure point of the second rod, B2 is the distance between the first and third pressure points of the first rod and the second rod; when the lower end of the first rod aligns with the second pressure point of the second rod, B3 is the distance between the first and second pressure points of the first rod and the second rod; when the lower end of the first rod aligns with the first pressure point of the second rod, B4 is the distance between the first and first pressure points of the first rod and the second rod; and 'b' is the distance from the fourth pressure point of the second rod to the end face of the second rod. When the second rod is fully extended, the lower end of the first rod is continuously connected to the first pressure point of the second rod. During the extension of the third rod, when the lower end of the second rod connects to the fourth pressure point of the third rod, C1 is the distance between the first and fourth pressure points of the first rod and the third rod. When the lower end of the second rod connects to the third pressure point of the third rod, C2 is the distance between the first and third pressure points of the first rod and the third rod. When the lower end of the second rod connects to the second pressure point of the third rod, C3 is the distance between the first and second pressure points of the first rod and the third rod. When the lower end of the second rod connects to the first pressure point of the third rod, C4 is the distance between the first and first pressure points of the first rod and the third rod. c is the distance from the fourth pressure point of the third rod to the surface of the three-rod flow tray.

[0086] In another embodiment, the drill pipe 3 includes a first pipe, a second pipe, a third pipe, and a fourth pipe that are sequentially mounted. The first pipe has four pressure points, and the first, second, and third pipes are arranged from top to bottom. The second, third, and fourth pipes have five pressure points. The number of sections and the number of pressure points per section can also be adjusted as needed, all within the scope of protection of this invention.

[0087] Taking a three-section member as an example, the specific working process is as follows:

[0088] Step 1: Install drill bit 4 onto drill rod 3. Lower the main winch until drill bit 4 lands on the ground. Raise the power head body 1 to find the third pressure point at the bottom of the first rod and align it. At this time, record the extension length h1 of the pressure cylinder 2. At this point, the drilling depth H=0.

[0089] Step 2 begins the overall downward drilling process, and the current value of the pressure cylinder 2 will remain in a high range. When the pressure cylinder 2 extends to H1, the drilling depth H = H1 - h1. Then, the drill rod 3 is lifted, and the current value of the pressure cylinder 2 decreases. At this point, the vertical movement of the pressure cylinder 2 will not be recorded.

[0090] After the soil is removed in step 3, the main unit is lowered back into the hole. The current value of the pressure cylinder 2 is low, so the length of the up and down movement of the pressure cylinder 2 will not be recorded.

[0091] Step 4: After drill bit 4 reaches the bottom of the hole, the power head body 1 finds and engages with the second or first pressure point on the first rod. At this point, the extension length of the electric cylinder is recorded as h2. Similarly, after drilling, the extension length of the pre-pressurized electric cylinder 2 is recorded as H2. The drilling depth at this time is H = H1 - h1 + H2 - h2. Furthermore, when the second or third rod extends, its lower end engages with the pressure points of the next rod, thus repeating this process to obtain h3, H3, h4, H4, h5, H5, etc. The final accumulated drilling depth is:

[0092] H=H1-h1+H2-h2+H3-h3+H4-h4+H5-h5+H6-h6+H7-h7.........;

[0093] At the same time, the pressure point is determined by calculation formula, and Δh is defined as the change in the extension length of the pressure electric cylinder 2 during each pressure process.

[0094] If the first rod is used at the third pressure point, H = Δh can be calculated from this.

[0095] If the first rod is used at the second pressure point, then H = A1 + Δh can be calculated from this.

[0096] If the first pressure point of the first rod is used, H = A2 + Δh can be calculated from this.

[0097] If the second rod is used at the fourth pressure point, then H = b + B1 - a + Δh can be calculated.

[0098] If the second rod is used at the third pressure point, then H = b + B² - a + Δh can be calculated.

[0099] If the second rod is used at the second pressure point, then H = b + B3 - a + Δh can be calculated.

[0100] If the first pressure point of the second rod is used, H = b + B4 - a + Δh can be calculated from this.

[0101] If the third rod is used at the fourth pressure point, then H = c + C1 - a + Δh can be calculated.

[0102] If the third pressure point of the third rod is used, H = c + C² - a + Δh can be calculated from this.

[0103] If the second pressure point of the third rod is used, H = c + C3 - a + Δh can be calculated from this.

[0104] If the first pressure point of the third rod is used, H = c + C4 - a + Δh can be calculated from this.

[0105] By combining the depth calculation formulas of both, we can determine which interval H is in (A1)~(A2)~(B1+ba)~(B2+ba)~(B3+ba)~(B4+ba)~(C1+ca)~(C2+ca)~(C3+ca)~(C4+ca) by subtracting the smaller value of the interval range. This will tell us which pressure point to use and the relative position to move.

[0106] For example, if H is between (C2+ca) and (C3+ca), it means that the third rod and the third pressure point are about to be used. At this time, the lower end of the first rod is continuously connected to the first pressure point of the second rod. The lower end of the second rod needs to connect to the third pressure point of the third rod. The extension amount of the pressure cylinder 2 needs to be h=Hc-C2+a+h'. The pressure cylinder 2 drives the power head body 1 and the first and second rods to move synchronously so that the lower end of the second rod finds a suitable pressure point on the third rod and can then press down.

[0107] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the extension rod in a specific embodiment of the rotary drilling rig provided by the present invention.

[0108] Based on the rotary drilling rig drilling control method provided in the above specific embodiments, controlling the main winch to lift the drill rod 3 and the pressure cylinder 2 to retract synchronously includes the following steps:

[0109] The head is equipped with an extension rod 6 that extends outwards, and the brush head 7 is inserted between the blades 5 of the drill bit 4. As the drill bit 4 rises, the power head body 1 drives it to rotate, and the blade pitch is equal to the ratio of the lifting distance per unit time to the number of rotations per unit time. The power head body 1 includes a motor. At this time, the spiral rotates upwards while remaining stationary, and the outer side of the blades 5 rotates upwards along the spiral line. The simple extension rod 6, in conjunction with the brush head 7, completes the scraping work. By combining an electric cylinder with the power head's rotary motor and reducer for precise coordination, the problem of the scraper being jammed is avoided, preventing incomplete scraping and leaving a significant amount of soil residue on the blades. Different spiral diameters and pitches are equipped with the same scraper structure, making it suitable for use with various spirals.

[0110] In addition to the rotary drilling rig drilling system described above, a specific embodiment of the present invention also provides a rotary drilling rig including the above-mentioned rotary drilling rig drilling system. The structure of other parts of the rotary drilling rig is described in the prior art and will not be repeated here.

[0111] The drilling control method, drilling system, and rotary drilling rig provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A drilling control method for a rotary drilling rig, characterized in that, The rotary drilling rig is used to control the up-and-down movement of its drilling system. The rotary drilling rig includes a power head body (1), a pressurized electric cylinder (2), a main winch, and a multi-stage telescopic drill rod (3), and comprises the following steps: Control the main winch to lower the drill rod (3) so that the drill bit (4) below the drill rod (3) contacts the ground; Control the power head body (1) to connect with the corresponding pressure point on the drill rod (3); The power head body (1) is started and the pressurizing electric cylinder (2) is extended and pressed down on the power head body (1). The main winch simultaneously lowers the drill rod (3) to complete the first round of drilling. The main winch is controlled to lift the drill rod (3), and the pressurized electric cylinder (2) retracts synchronously; Control the main winch to lower the drill rod (3) so that the drill bit (4) contacts the bottom of the hole; Control the connection of the corresponding pressure point on the drill rod (3); The power head body (1) is started and the pressurizing electric cylinder (2) is extended and pressed down on the power head body (1). The main winch simultaneously lowers the drill rod (3) to complete the second round of drilling. Repeat the above lifting and lowering actions until drilling is complete, completing multiple rounds of drilling.

2. The rotary drilling rig drilling control method according to claim 1, characterized in that, The steps for controlling the connection of the corresponding pressure point on the drill pipe (3) include: Obtain the drilling depth; Select a suitable pressure point on the drill rod (3) according to the drilling depth; Control the extension and retraction of the pressurizing electric cylinder (2) to complete the docking at the appropriate pressurization point.

3. The rotary drilling rig drilling control method according to claim 2, characterized in that, The steps for obtaining the drilling depth include: Obtain the forward extension length of the pressurizing electric cylinder (2) when the pressurization point is connected before each round of drilling action; Obtain the rear extension length of the pressurized electric cylinder (2) when the same drilling action is completed; The drilling length for each round is obtained by subtracting the forward extension length from the rear extension length for each round. The drilling depth is obtained by summing the drilling lengths of each round.

4. The rotary drilling rig drilling control method according to claim 3, characterized in that, The step of selecting a suitable pressure point on the drill rod (3) based on the drilling depth includes the following steps: Define the preset depth corresponding to each pressurization point; The preset depths of the pressurization points arranged from top to bottom are sequentially arranged to form multiple range intervals, and the endpoint values ​​of the range intervals are the preset depths of two adjacent pressurization points; Determine the range within which the drilling depth falls, and select the corresponding pressurization point at the upper endpoint within this range as the appropriate pressurization point.

5. The rotary drilling rig drilling control method according to claim 4, characterized in that, The steps of controlling the extension and retraction of the pressurizing electric cylinder (2) to complete the docking at the appropriate pressurization point include: The docking extension amount of the pressurized electric cylinder (2) is calculated using a formula; The formula is: h = H - L + h'; Where h is the docking extension amount, H is the drilling depth, L is the preset depth corresponding to the appropriate pressure point, and h' is the forward extension length.

6. The rotary drilling rig drilling control method according to any one of claims 1 to 5, characterized in that, The steps of controlling the main winch to lift the drill rod (3) and the pressurized electric cylinder (2) to retract synchronously include: The head is provided with an extension rod (6) with a brush head (7) extending out. The brush head (7) is inserted between the blades (5) of the drill bit (4). While the drill bit (4) is lifted, the power head body (1) drives the drill bit (4) to rotate. The blade pitch is equal to the ratio of the lifting distance per unit time to the number of rotations per unit time. The power head body (1) includes a motor.

7. A rotary drilling rig drilling system, characterized in that, The rotary drilling rig drilling control method described in any one of claims 1 to 6 includes a power head body (1), a pressurizing electric cylinder (2), a main winch, and a multi-stage telescopic drill rod (3). The main winch hoists the top end of the drill rod (3), the bottom end of the drill rod (3) is connected to the drill bit (4), the power head body (1) is connected to the drill rod (3), and the bottom end of the pressurizing electric cylinder (2) is connected to the power head body (1).

8. The rotary drilling rig drilling system according to claim 7, characterized in that, The drill pipe (3) includes a first rod, a second rod and a third rod that are sequentially fitted together. The first rod has three pressure points, and the second rod and the third rod have four pressure points.

9. The rotary drilling rig system according to any one of claims 7 or 8, characterized in that, It also includes an extension rod (6), the head of which is provided with a brush head (7), the extension rod (6) being able to insert the brush head (7) into the gap between the blades (5) of the drill bit (4), and the power head body (1) including a motor.

10. A rotary drilling rig, characterized in that, Includes the rotary drilling rig drilling system as described in any one of claims 7 to 9.

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