Hydraulic prospecting drill

Abstract

The present invention relates to the technical field of prospecting drills, and provides a hydraulic prospecting drill, which includes a drill pipe. A liquid supply channel and a return channel that extend to the drill bit and are interconnected are provided inside the drill pipe. The liquid supply channel and the return channel are respectively provided with lateral holes at different positions in the upper part of the drill pipe. A connecting ring is sleeved at the position of the lateral hole of the drill pipe; an annular groove is provided on the inner ring surface of the connecting ring, and the position of the annular groove corresponds to that of the lateral hole. A connecting head that communicates with the annular groove is provided on the outer ring surface of the connecting ring; the connecting head is connected to a medium pipe to realize the supply of a cooling medium to the drill pipe for cooling. By providing a liquid supply channel and a return channel inside the drill pipe, and using the connecting ring sleeved on the drill pipe to connect with the medium pipe, the present invention supplies a cooling medium to the drill pipe for cooling. During operation, the temperature of the drill pipe and its drill bit part is reduced, the working rigidity of the drill pipe is improved, the probability of drill pipe deformation is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of prospecting drills, and particularly to a hydraulic prospecting drill. Background Art

[0002] There are mainly two types of prospecting drill equipment: mechanical drilling and hydraulic-driven drilling. Since the power head of the mechanical drilling rig is driven by gears, the mechanical wear is too large. The drilling rig with hydraulic-driven drilling uses a hydraulic motor as the power head, and in recent years, the drilling rig with hydraulic-driven drilling has developed rapidly.

[0003] Due to the friction during the drilling process, the temperature of the drill pipe of the prospecting drill increases, and it is prone to deformation after a long time, reducing the service life. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a hydraulic prospecting drill. A liquid supply channel and a return channel that extend to the drill bit and are interconnected are provided inside the drill pipe. The liquid supply channel and the return channel are respectively provided with lateral holes at different positions in the upper part of the drill pipe. A connecting ring is sleeved at the position of the lateral hole of the drill pipe.

[0005] An annular groove is provided on the inner ring surface of the connecting ring, and the position of the annular groove corresponds to that of the lateral hole. A connecting head that communicates with the annular groove is provided on the outer ring surface of the connecting ring. The connecting head is connected to a medium pipe to realize the supply of a cooling medium to the drill pipe for cooling.

[0006] Optionally, the distances between the liquid supply channel and the return channel and the axis of the drill pipe are different.

[0007] The liquid supply channel and / or the return channel are respectively provided as multiple channels, and are connected by a spiral channel at the drill bit. The flow direction of the medium in the spiral channel is opposite to the rotation direction of the drill bit.

[0008] Optionally, the liquid supply channel or the return channel is located at the axis of the drill pipe. Correspondingly, the return channel or the liquid supply channel is provided as multiple channels and is arranged at circumferential intervals around the axis of the drill pipe.

[0009] Optionally, annular sealing grooves and gland covers are provided at both the upper end and the lower end of the inner ring surface of the connecting ring. A sealing material is filled in the annular sealing grooves. The gland cover is fixedly connected to the connecting ring by bolts, and the gland cover is used to compress the sealing material.

[0010] Optionally, grooves for installing ball bearings are annularly provided on the inner ring surface of the connecting ring at both the upper end and the lower end of the annular groove. There is a clearance fit between the inner ring surface of the connecting ring between the grooves and the outer side surface of the drill pipe.

[0011] Optionally, a controller is further provided. The controller is connected to a temperature sensor and a pressure sensor.

[0012] The temperature sensor and the pressure sensor are installed on the medium pipe. The temperature sensor is used to measure the supply temperature and the return temperature of the cooling medium for the drill pipe, and the pressure sensor is used to measure the supply pressure and the return pressure of the cooling medium for the drill pipe;

[0013] The controller is used to determine the supply demand increment of the cooling medium according to the supply temperature and the return temperature, and adjust the supply of the cooling medium according to the supply demand increment. It also verifies the supply quantity of the cooling medium according to the supply pressure and the return pressure. If the verification does not match, the supply of the cooling medium is adjusted again.

[0014] Optionally, the controller calculates the percentage of the supply demand increment of the cooling medium using the following formula:

[0015]

[0016] In the above formula, R 增 represents the percentage of the supply demand increment of the cooling medium; t 回 represents the return temperature of the cooling medium; t 供 represents the supply temperature of the cooling medium; t 限 represents the designed maximum temperature value of the return temperature of the cooling medium, which is determined according to the material of the drill pipe.

[0017] Optionally, the way for the controller to verify the supply increment of the cooling medium is as follows:

[0018] The following formula is used to calculate the actual supply increment ratio of the cooling medium:

[0019]

[0020] In the above formula, R 实增 represents the actual supply increment ratio of the cooling medium; P 后供 represents the supply pressure of the cooling medium after adjustment; P 后回 represents the return pressure of the cooling medium after adjustment; P 前供 represents the supply pressure of the cooling medium before adjustment; P 前回 represents the return pressure of the cooling medium before adjustment;

[0021] Compare the actual supply increment ratio with the percentage of the supply demand increment. If the actual supply increment ratio is equal to the percentage of the supply demand increment, it means the verification is in line; if the actual supply increment ratio is less than the percentage of the supply demand increment, it means that the supply quantity of the cooling medium needs to be further controlled to increase; if the actual supply increment ratio is greater than the percentage of the supply demand increment, it means that the previous supply quantity adjustment increment is too large, and the supply quantity of the cooling medium needs to be controlled to decrease for callback.

[0022] Optionally, the controller is connected with an infrared rangefinder and a force sensor. The infrared rangefinder is used to measure the drilling amount data of the drill pipe; the force sensor is used to measure the force data of the drill pipe, including torque data or hammering force data;

[0023] The controller is built with a rock hardness analysis model. The rock hardness analysis model analyzes and obtains the rock hardness data according to the force data and the corresponding drilling amount data of the drill pipe.

[0024] Optionally, the controller is connected with a communication module. The communication module is connected to the terminal device through a network and conducts data interaction.

[0025] In the hydraulic prospecting drill of the present invention, by arranging a liquid supply channel and a return channel in the drill pipe, and connecting the medium pipe with a connecting ring sleeved on the drill pipe, cooling medium is supplied to the drill pipe for cooling. During operation, the temperature of the drill pipe (especially the bit part) is reduced, the working rigidity of the drill pipe is improved, the probability of drill pipe deformation is reduced, and the service life is extended; among them, the liquid supply channel and the return channel can be symmetrically arranged at the same distance from the axis of the drill pipe, so that the center of gravity of the drill pipe is balanced and the rotation is balanced during operation; the cooling medium can adopt the same medium as the provided hydraulic pressure; or a refrigerant can be selected as the medium. If a refrigerant is used as the medium, the latent heat of the refrigerant can be utilized for drill pipe cooling, which can improve the cooling efficiency.

[0026] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the written specification, claims, and drawings.

[0027] Next, through the drawings and embodiments, the technical solutions of the present invention will be further described in detail. Description of the Drawings

[0028] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0029] Figure 1 is a partial schematic diagram of a drill pipe adopted by a hydraulic prospecting drill in an embodiment of the present invention;

[0030] Figure 2 is the hydraulic prospecting drill of the present invention Figure 1 An enlarged schematic diagram of part A of the embodiment;

[0031] Figure 3 is a connection schematic diagram of a controller, a temperature sensor and a pressure sensor adopted by the hydraulic prospecting drill of the present invention. Detailed Embodiments

[0032] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

[0033] As Figure 1 shown, an embodiment of the present invention provides a hydraulic prospecting drill, including a drill pipe 1. A liquid supply channel 11 and a return channel 12 that extend to the drill bit and are interconnected are provided inside the drill pipe 1. Lateral holes 13 are provided at different positions in the upper part of the drill pipe 1 for the liquid supply channel 11 and the return channel 12 respectively. A connecting ring 2 is sleeved at the position of the lateral hole 13 of the drill pipe 1;

[0034] An annular groove 21 is provided on the inner ring surface of the connecting ring 2. The position of the annular groove 21 corresponds to that of the lateral hole 13. A connecting head 22 that communicates with the annular groove 21 is provided on the outer ring surface of the connecting ring 2; the connecting head 22 is connected to the medium pipe to realize the supply of cooling medium to the drill pipe for cooling.

[0035] The working principle and beneficial effects of the above technical solution are as follows: In this solution, a liquid supply channel and a return channel are arranged inside the drill pipe, and a connecting ring sleeved on the drill pipe is connected to the medium pipe, so as to supply cooling medium to the drill pipe for cooling. During work, the temperature of the drill pipe (especially the drill bit part) is reduced, the working rigidity of the drill pipe is improved, the probability of drill pipe deformation is reduced, and the service life is prolonged; among them, the liquid supply channel and the return channel can be symmetrically arranged at the same distance from the axis of the drill pipe, so that the center of gravity of the drill pipe is balanced and the rotation is balanced during work; the cooling medium can adopt the same medium as the provided hydraulic pressure; or a refrigerant can be selected as the medium. If a refrigerant is used as the medium, the latent heat of the refrigerant can be utilized for drill pipe cooling, which can improve the cooling efficiency.

[0036] In one embodiment, the distances between the liquid supply channel and the return channel and the axis of the drill pipe are different;

[0037] The liquid supply channel and / or the return channel are respectively arranged in multiple numbers, and are connected by a spiral channel at the drill bit. The flow direction of the medium in the spiral channel is opposite to the rotation direction of the drill bit;

[0038] The liquid supply channel or the return channel is located at the axis of the drill pipe. Correspondingly, multiple return channels or liquid supply channels are arranged at circumferential intervals around the axis of the drill pipe.

[0039] The working principle and beneficial effects of the above technical solution are as follows: In this solution, the liquid supply channel and / or the reflux channel are respectively set to be multiple, and a spiral channel is used for connection at the drill bit. The medium flow direction of the spiral channel is opposite to the rotation direction of the drill bit, making the cooling of the drill bit part more uniform and better ensuring the working state of the drill bit. The distances between the liquid supply channel and the reflux channel and the axis of the drill pipe are different, which is beneficial to ensuring reliable isolation between the liquid supply channel and the reflux channel except at the drill bit, reducing the manufacturing difficulty, and avoiding the cooling medium from flowing back before reaching the drill bit due to manufacturing errors. In addition, one of the liquid supply channel and the reflux channel is located at the axis of the drill pipe, and the other is set to be multiple and arranged circumferentially at intervals around the axis of the drill pipe. On the one hand, it reduces the manufacturing difficulty and realizes reliable isolation. On the other hand, it makes the center of gravity of the drill pipe balanced and the rotation balanced during work.

[0040] In one embodiment, as Figure 1 shown, annular sealing grooves and gland covers 3 are provided at both the upper and lower ends of the inner ring surface of the connecting ring 2. Sealing materials 4 are filled in the annular sealing grooves, and the gland covers 3 are fixedly connected to the connecting ring 2 by bolts and the gland covers 3 are used to compress the sealing materials 4;

[0041] As Figure 2 shown, grooves for installing balls 5 are annularly arranged at both the upper and lower ends of the inner ring surface of the connecting ring 2 in the annular groove 21, and the inner ring surface of the connecting ring between the grooves and the outer side surface of the drill pipe are in clearance fit.

[0042] The working principle and beneficial effects of the above technical solution are as follows: In this solution, annular sealing grooves and gland covers are provided at both the upper and lower ends of the inner ring surface of the connecting ring, and sealing is carried out by filling with sealing materials, and the sealing materials are compressed by the gland covers to ensure that the cooling medium will not leak between the drill pipe and the connecting ring; grooves for installing balls are annularly arranged at both the upper and lower ends of the inner ring surface of the connecting ring in the annular groove, so that when the drill pipe rotates, the friction between the drill pipe and the connecting ring is reduced, wear and resistance are reduced, and the energy consumption of the drilling rig is reduced; the inner ring surface of the connecting ring between the grooves and the outer side surface of the drill pipe are in clearance fit, so that part of the cooling medium can be injected into the position of the balls and the grooves, on the one hand for cooling, and on the other hand for enhancing lubrication and improving the service life of the equipment.

[0043] In one embodiment, as Figure 3 shown, a controller 10 is further provided, and the controller 10 is connected with a temperature sensor 20 and a pressure sensor 30;

[0044] The temperature sensor 20 and the pressure sensor 30 are installed on the medium pipe. The temperature sensor 20 is used to measure the supply temperature and reflux temperature of the cooling medium of the drill pipe, and the pressure sensor 30 is used to measure the supply pressure and reflux pressure of the cooling medium of the drill pipe;

[0045] The controller 10 is used to determine the supply demand increment of the cooling medium based on the supply temperature and the return temperature, adjust the supply of the cooling medium according to the supply demand increment, and also verify the supply increment of the cooling medium based on the supply pressure and the return pressure. If the verification does not match, the supply of the cooling medium is adjusted again.

[0046] The working principle and beneficial effects of the above technical solution are as follows: In this solution, temperature sensors and pressure sensors are set to measure the supply, return temperature and pressure of the cooling medium respectively, and transmit them to the controller. The controller determines the supply demand increment of the cooling medium based on the measurement data, and adjusts the supply of the cooling medium according to the supply demand increment. After the adjustment, the supply increment of the cooling medium is also verified based on the supply pressure and the return pressure. If the verified adjustment does not match the demand increment, the supply of the cooling medium is adjusted again until the adjustment is adapted to the demand. This solution improves the accuracy of controlling the supply amount of the cooling medium, effectively guarantees the cooling effect of the drill pipe, and can improve the service life.

[0047] In one embodiment, the controller calculates the percentage of the supply demand increment of the cooling medium using the following formula:

[0048]

[0049] In the above formula, R 增 represents the percentage of the supply demand increment of the cooling medium; t 回 represents the return temperature of the cooling medium; t 供 represents the supply temperature of the cooling medium; t 限 represents the designed maximum temperature value of the return temperature of the cooling medium, which is determined according to the material of the drill pipe.

[0050] The working principle and beneficial effects of the above technical solution are as follows: This solution uses the method of calculating the percentage of the supply demand increment of the cooling medium to determine the supply demand increment of the cooling medium proportionally, and realizes the proportional adjustment of the supply of the cooling medium. The formula used has a small amount of calculation and a fast operation speed, and can meet the requirement of real-time adjustment.

[0051] In one embodiment, the controller verifies the supply increment of the cooling medium in the following manner:

[0052] The following formula is used to calculate the actual supply increment ratio of the cooling medium:

[0053]

[0054] In the above formula, R 实增 represents the actual supply increment ratio of the cooling medium; P 后供 represents the supply pressure of the cooling medium after adjustment; P 后回 represents the return pressure of the cooling medium after adjustment; P前供 represents the supply pressure of the cooling medium before adjustment; P 前回 represents the return pressure of the cooling medium before adjustment;

[0055] Compare the actual supply increment ratio with the percentage of the supply demand increment. If the actual supply increment ratio is equal to the percentage of the supply demand increment, it indicates that the verification is in line; if the actual supply increment ratio is less than the percentage of the supply demand increment, it means that the supply of the cooling medium needs to be further controlled to increase; if the actual supply increment ratio is greater than the percentage of the supply demand increment, it means that the previous supply adjustment increment is too large, and the supply of the cooling medium needs to be controlled to decrease for callback.

[0056] The working principle and beneficial effects of the above technical solution are as follows: According to the pressure change data, this solution calculates the actual supply increment ratio of the cooling medium through the above formula to verify the supply demand increment ratio, improving the accuracy of the control of the supply of the cooling medium, effectively ensuring the cooling effect of the drill pipe, and can improve the service life; the calculation formula adopted is derived from the relationship between the frictional loss along the path of the cooling medium fluid and the pressure difference. This formula has less calculation amount and fast operation speed, and can meet the requirement of real-time adjustment verification.

[0057] In one embodiment, the controller is connected with an infrared rangefinder and a force sensor. The infrared rangefinder is used to measure the drilling amount data of the drill pipe; the force sensor is used to measure the force data of the drill pipe, including torque data or hammering force data;

[0058] The controller has a built-in rock hardness analysis model. The rock hardness analysis model analyzes the rock hardness data based on the force data and corresponding drilling amount data of the drill pipe.

[0059] The working principle and beneficial effects of the above technical solution are as follows: By setting an infrared rangefinder and a force sensor in this solution, which are respectively used to measure the drilling amount data and force data of the drill pipe, and cooperating with the setting of a rock hardness analysis model in the controller to conduct rock layer analysis and obtain rock hardness data, it can be used for the analysis of rock layers and mineral deposits in the prospecting area, and can timely adjust the prospecting plan as necessary to improve the prospecting efficiency.

[0060] In one embodiment, the controller is connected with a communication module, and the communication module is connected to a terminal device through a network and conducts data interaction.

[0061] The working principle and beneficial effects of the above technical solution are as follows: By setting a communication module in this solution to establish a network connection, it can be connected to a terminal device through the network. The terminal device can be a remote computer device or a mobile terminal device, such as a mobile phone, etc., which is convenient for relevant staff to timely understand the prospecting situation, and can also timely transmit the prospecting data to the relevant party for data analysis to improve the prospecting analysis efficiency.

[0062] In one embodiment, the controller is connected to a memory which is used to store the detection data of the temperature sensor and the pressure sensor. The memory has pre-stored various temperature range segments of the working temperature of the drill pipe.

[0063] The controller determines the real-time working temperature of the drill bit of the drill pipe according to the measured supply temperature and return temperature of the cooling medium, and determines the temperature range segment to which it belongs in the working temperature of the drill pipe.

[0064] The controller is provided with a drill pipe life prediction model, and the drill pipe life prediction model uses the following formula to predict the remaining service life of the drill pipe:

[0065]

[0066] In the above formula, T 剩 represents the predicted remaining service life of the drill pipe; T0 represents the designed service life of the drill pipe, which is determined according to the design or through test and measurement; n represents the number of temperature range segments of the working temperature of the drill pipe; K i represents the life influence coefficient of the drill pipe used in the i-th temperature range segment, which is related to factors such as the temperature range in which the drill pipe works and the usage interval time, and is determined through test and measurement; T i represents the usage duration of the drill bit of the drill pipe in the i-th temperature range segment.

[0067] If the predicted remaining service life of the drill pipe is lower than the set threshold value, the controller sends a warning message through the alarm connected to it.

[0068] The working principle and beneficial effects of the above technical solution are as follows: This solution uses the supply temperature and return temperature of the cooling medium to determine the real-time working temperature of the drill bit of the drill pipe, taking into account the heat exchange temperature difference and avoiding the difficulty of measuring the real-time working temperature of the drill bit deep underground; by setting up a drill pipe life prediction model to predict the remaining service life of the drill pipe and comparing the predicted remaining service life with the set threshold value to determine whether a warning needs to be issued, reminding the user of the remaining usage duration that the drill pipe can support while ensuring safety, so as to prompt the user to replace the new drill pipe in time; the above prediction formula introduces the life influence coefficient of the usage frequency of the drill pipe in a specific working temperature range, fully considering the quantitative influence of the drill pipe usage frequency difference and temperature difference on the service life, which can improve the prediction accuracy of the remaining service life of the drill pipe, remind to replace the drill pipe in time, and avoid potential safety hazards caused by inappropriate overuse of the drill pipe.

[0069] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A hydraulic prospecting drill, characterized in that, It includes a drill pipe. Inside the drill pipe, there are a liquid supply channel and a return channel that extend to the drill bit and are interconnected. The liquid supply channel and the return channel are respectively provided with lateral holes at different positions in the upper part of the drill pipe, and a connecting ring is sleeved at the position of the lateral holes of the drill pipe. The inner ring surface of the connecting ring is provided with an annular groove, the position of the annular groove corresponds to that of the lateral hole, and the outer ring surface of the connecting ring is provided with a connector that communicates with the annular groove; the connector is connected to the medium pipe to realize the supply of a cooling medium to the drill pipe for cooling. A controller is also provided, and the controller is connected with a temperature sensor and a pressure sensor. The temperature sensor and the pressure sensor are installed on the medium pipe. The temperature sensor is used to measure the supply temperature and the return temperature of the cooling medium of the drill pipe, and the pressure sensor is used to measure the supply pressure and the return pressure of the cooling medium of the drill pipe. The controller is used to determine the supply demand increment of the cooling medium according to the supply temperature and the return temperature, and adjust the supply of the cooling medium according to the supply demand increment. It also verifies the supply amount of the cooling medium according to the supply pressure and the return pressure. If the verification does not match, the supply of the cooling medium is adjusted again.

2. The hydraulic prospecting drill according to claim 1, characterized in that, The distances between both the liquid supply channel and the return channel and the axis of the drill pipe are different. The liquid supply channel and / or the return channel are respectively arranged in multiple numbers, and are connected by a spiral channel at the drill bit, and the medium flow direction of the spiral channel is opposite to the rotation direction of the drill bit.

3. The hydraulic prospecting drill according to claim 1, characterized in that, The liquid supply channel or the return channel is located at the axis of the drill pipe. Correspondingly, the return channel or the liquid supply channel is arranged in multiple numbers and is circumferentially spaced around the axis of the drill pipe.

4. The hydraulic prospecting drill according to claim 1, characterized in that Both the upper end and the lower end of the inner ring surface of the connecting ring are provided with an annular sealing groove and a gland. The annular sealing groove is filled with a sealing material, and the gland is fixedly connected to the connecting ring by bolts and is used to press the sealing material.

5. The hydraulic prospecting drill according to claim 1, characterized in that, The inner ring surface of the connecting ring is annularly provided with grooves for installing balls at the upper end and the lower end of the annular groove. The inner ring surface of the connecting ring between the grooves and the outer side surface of the drill pipe are in clearance fit.

6. The hydraulic prospecting drill according to claim 1, characterized in that, The controller calculates the percentage of the supply demand increment of the cooling medium by using the following formula: In the above formula, represents the percentage increase in the supply demand of the cooling medium; represents the return temperature of the cooling medium; represents the supply temperature of the cooling medium; represents the designed maximum limit temperature value of the return temperature of the cooling medium, which is determined according to the material of the drill pipe.

7. The hydraulic prospecting drill according to claim 6, characterized in that, The way for the controller to verify the supply increment of the cooling medium is as follows: The actual supply increment ratio of the cooling medium is calculated by using the following formula: In the above formula, represents the actual supply increment ratio of the cooling medium; represents the supply pressure of the cooling medium after adjustment; represents the return pressure of the cooling medium after adjustment; represents the supply pressure of the cooling medium before adjustment; represents the return pressure of the cooling medium before adjustment; Compare the actual supply increment ratio with the percentage of the supply demand increment. If the actual supply increment ratio is equal to the percentage of the supply demand increment, it means the verification is in line. If the actual supply increment ratio is less than the percentage of the supply demand increment, it means that the supply amount of the cooling medium needs to be continuously controlled to increase. If the actual supply increment ratio is greater than the percentage of the supply demand increment, it means that the previous supply amount adjustment increment is too large, and the supply amount of the cooling medium needs to be controlled to decrease for callback.

8. The hydraulic prospecting drill according to claim 1, wherein The controller is connected with an infrared rangefinder and a force sensor. The infrared rangefinder is used to measure the drilling amount data of the drill pipe; the force sensor is used to measure the force data of the drill pipe, including torque data or hammering force data. The controller has a rock formation hardness analysis model built in. The rock formation hardness analysis model analyzes and obtains the rock formation hardness data according to the force data and the corresponding drilling amount data of the drill pipe.

9. The hydraulic prospecting drill according to claim 1, characterized in that, The controller is connected with a communication module, and the communication module is connected to the terminal device through the network and conducts data interaction.

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