WO2024255073A1 - Conical trepanning device applied to deep-sea seabed penetration probe rod and using method - Google Patents

Abstract

Provided in the present application are a conical trepanning device applied to a deep-sea seabed penetration probe rod and a using method. The device comprises a drill rod, a sleeve, a conical trepanning device and a sensor unit structure, wherein the sleeve is connected to the conical trepanning device in parallel by means of a connecting plate; the diameter of the lower end of the drill rod is smaller than the diameter of the upper end of the drill rod, the connection between the upper end and the lower end is a variable-diameter position, and the drill rod detachably passes through the sleeve; the conical trepanning device is provided with a resistance support and a numerical control module located in the device; the numerical control module is in communication connection with a controller of an operator, and is in signal connection with the resistance support and controls the resistance support to extend or retract; and the sensor unit structure is mounted on the conical trepanning device. The device can meet the function of effectively separating a drill rod for penetration during seabed sediment monitoring from a sensor unit structure, avoiding the problem of being unable to perform long-term monitoring after a probe rod is recovered in a probe rod mode where the drill rod and a detection unit are integrated, and thus improving the utilization efficiency of the drill rod in a penetration device.

Description

A conical hole opening device for deep seabed penetration probe and use method thereof

This application claims the priority of the Chinese patent application filed with the China Patent Office on June 14, 2023, with application number 2023107055536 and application name “A conical hole opening device and use method for deep-sea seabed penetration probe rod”, all contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the technical field of seabed sediment monitoring equipment, and in particular to a conical hole opening device used for a deep-sea seabed penetration probe and a method of using the device.

Background Art

Monitoring the physical properties of deep seabed surface sediments is an important task in marine engineering construction. The penetration means and long-term monitoring methods for in-situ multi-parameter measurement sensors of seabed sediments mainly include: first, pre-drilling at designated locations and burying monitoring instruments in the pre-drilled holes. This requires large ships, drilling systems, and underwater placement equipment, which are difficult to operate, costly, time-consuming, and have a low cost-performance ratio; second, using gravity-type penetration equipment, relying on the equipment's own gravity to penetrate into a certain stratum depth, generally for point monitoring, and the penetration depth is uncertain depending on the geological conditions; third, using hydraulic transmission to penetrate the equipment's own monitoring sensors into the seabed. The entire set of monitoring equipment and the penetration device need to stay on the seabed for a long time, which brings difficulties to the subsequent recovery of the device.

The existing seabed sediment monitoring equipment has a penetration section where the drill pipe and the sensor are connected in parallel to form a probe that can penetrate the seabed sediment. The probe is inserted into the seabed sediment using gravity or the hydraulic power structure of the penetration end itself, and the sensor can be driven into the sediment at the same time. However, an obvious drawback of this method is that once the mechanical probe is recovered after the penetration, the sensor will also be taken out of the sediment, and it is impossible to ensure that the sensor unit can perform long-term monitoring in situ in the sediment.

Application Contents

The purpose of this application is to overcome the shortcomings of the above-mentioned prior art and provide a conical hole opening device and a method of use for deep seabed penetration probes.

The present application is realized through the following technical scheme: a conical hole-opening device for deep-sea seabed penetration probe, comprising a drill rod, a sleeve, a conical hole-opening device and a sensor unit structure; the sleeve is connected in parallel with the conical hole-opening device through a connecting plate; the diameter of the lower end of the drill rod is smaller than the diameter of its upper end, and the connection between the upper end and the lower end is a diameter-changing position, and the drill rod is detachably inserted into the sleeve; the conical hole-opening device is provided with a resistance bracket and a numerical control module located inside the device, the numerical control module is communicatively connected with the operator's controller, the numerical control module is signal-connected with the resistance bracket and controls the extension or retraction of the resistance bracket; the sensor unit structure is installed on the conical hole-opening device; when the drill rod penetrates, the drill rod passes downward into the sleeve and is stuck in the sleeve at the diameter-changing position; after the penetration is completed, the operator operates the controller to send an instruction, and the numerical control module releases the resistance bracket after receiving the signal, and the drill rod is detached from the sleeve and recovered.

The conical hole-opening device can realize parallel connection of the drill pipe and the sensor unit structure through mechanical structure coupling. The lower end of the drill pipe is thin and the upper end is thick. When the drill pipe penetrates, it can automatically clamp the sleeve in one direction during the process of entering the sleeve. The drill pipe and the conical hole-opening device can be penetrated synchronously, and at the same time, it can ensure that the drill pipe contacts the seabed mud surface before the sensor unit structure.

The bottom end of the drill rod is a conical structure, and the bottom end of the conical hole opening device is a conical structure. The bottom ends of the drill rod and the conical hole opening device both adopt conical structures, which can effectively drill the soft sediments on the seabed surface.

The conical hole opening device is provided with an installation slot, and the resistance bracket is installed in the installation slot and can be rotatably extended outward to form an inverted umbrella-shaped structure. The inverted umbrella-shaped resistance bracket can increase the resistance with the seabed sediment and prevent the displacement of the sensor unit structure when the drill rod is recovered.

The resistance bracket is a plurality of paddle blades, and the paddle blades are hinged in the mounting grooves. The numerical control module controls the paddle blades to rotate and stretch and open or to retract and store in the mounting grooves.

The paddles are provided with three pieces, and the mounting grooves are provided with three pieces correspondingly, and the three mounting grooves are evenly distributed around the outer periphery of the conical hole opening device. The paddles and mounting grooves are evenly distributed, so that the force is evenly applied, which is conducive to increasing the friction with the sediment.

The resistance bracket is a rigid structure.

The sensor unit structure is a flexible sensor chain, the lower end of which is mounted on the conical hole opening device, and the upper end is connected to a float. The sensor unit structure adopts a flexible sensor chain to prevent the conical hole opening device and the sensor unit structure from disappearing together, and cooperates with the float to make It is beneficial to the later recovery work, so as to achieve the purpose of data recovery.

A method for using a conical hole opening device for a deep-sea seabed penetration probe comprises the following steps:

Step 1: Insert the drill pipe into the sleeve, the diameter change position of the drill pipe is stuck in the sleeve, and the sensor unit structure and the drill pipe are released to penetrate the seabed;

Step 2: Under the action of the conical hole opening device, the drill pipe and the sensor unit structure are synchronously penetrated into the seabed sediment, and the drill pipe contacts the seabed mud surface before the sensor unit structure;

Step 3: The operator operates the controller to send a command, and the numerical control module releases the resistance bracket after receiving the signal. The resistance bracket is distributed in an umbrella shape, and the drill pipe is separated from the sleeve and recovered to the survey ship. The sensor unit structure and the conical opening device remain on the seabed;

Step 4: Release the sensor unit structure to make it in a relaxed and powerless state, the survey ship starts the monitoring mode, and the CNC module performs long-term data collection and storage operations;

Step 5: The recovered drill pipe can be used to continue other drilling operations;

Step 6: An underwater grabber or float is installed on the top of the sensor unit structure. After completing the monitoring cycle, the operator remotely controls the unmanned submersible to grab the underwater grabber or float to recover the sensor unit structure and the conical opening device.

Compared with the prior art, the advantages of the present application are as follows: the present device solves the key technology that the sensor unit can be effectively separated from the mechanical drill rod during the drill rod recovery stage after the seabed sediment drill rod penetration operation is completed; the technology will greatly improve the working efficiency of the seabed shallow stratum penetration monitoring work means, realize the working mode of matching one set of drill rods with multiple sets of sensor units, and the technology of automatic separation of the drill rod and the sensor unit structure also improves the utilization rate of the penetration section equipment and the drill rod; the present device can meet the function of effectively separating the drill rod and the sensor unit structure used for penetration during the seabed sediment monitoring process, avoiding the problem that in the existing probe rod mode in which the drill rod and the detection unit are integrated, long-term monitoring cannot be performed after the probe rod is recovered, thereby improving the utilization efficiency of the drill rod in the penetration device.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG1 is a front view of an embodiment of the present application in a penetration state;

FIG2 is a top view of the embodiment of the present application in a penetration state;

Fig. 3 is a cross-sectional view along the line A-A in Fig. 2;

FIG4 is a perspective view of an embodiment of the present application in a penetration state;

FIG5 is a perspective view of the embodiment of the present application in the other side of the penetration state;

FIG6 is a front view of the drill pipe in the embodiment of the present application in a recovered state;

FIG7 is a top view of the drill pipe in the recovered state according to the embodiment of the present application;

Fig. 8 is a cross-sectional view along the line B-B in Fig. 7;

FIG9 is a side view of the drill pipe in the recovered state according to the embodiment of the present application;

FIG10 is a perspective view of a drill pipe in a recovered state according to an embodiment of the present application;

FIG. 11 is a three-dimensional view of the drill rod in the other side of the embodiment of the present application in a recovered state.

Description of reference numerals:

1-drill rod; 2-sleeve; 3-conical hole opening device; 4-sensor unit structure; 5-connecting plate; 6-resistance bracket; 7-installation slot.

DETAILED DESCRIPTION

In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The following describes a conical hole opening device and a method of use for a deep-sea seabed penetration probe provided by the present application with reference to the accompanying drawings.

Referring to Fig. 1 to Fig. 11, a conical hole-opening device for deep-sea seabed penetration probe is shown, comprising a drill rod 1, a sleeve 2, a conical hole-opening device 3 and a sensor unit structure 4; the sleeve 2 is connected in parallel with the conical hole-opening device 3 through a connecting plate 5; the diameter of the lower end of the drill rod 1 is smaller than the diameter of its upper end, and the connection between the upper end and the lower end is a variable diameter position, and the drill rod 1 is detachably inserted into the sleeve 2; the conical hole-opening device 3 is provided with a resistance bracket 6 and a numerical control module located inside the device, the numerical control module is connected to the operator's controller for communication, and the numerical control module is connected to the resistance bracket 6 signal and controls the resistance bracket 6 to extend or retract; the sensor unit structure 4 is installed on the conical hole-opening device 3; when the drill rod 1 penetrates, The drill pipe 1 passes downward through the sleeve 2 and is stuck in the sleeve 2 at the diameter-changing position; after the penetration is completed, the operator operates the controller to send a command, and the numerical control module releases the resistance bracket 6 after receiving the signal, and the drill pipe 1 is separated from the sleeve 2 and recovered.

The conical hole-opening device 3 can realize parallel connection between the drill pipe 1 and the sensor unit structure 4 through mechanical structure coupling. The drill pipe 1 has a thin lower end and a thick upper end. When the drill pipe 1 penetrates, it can automatically unidirectionally clamp the sleeve 2 during the process of entering the sleeve 2; the drill pipe 1 and the conical hole-opening device 3 are penetrated synchronously, and at the same time, it can ensure that the drill pipe 1 contacts the seabed mud surface before the sensor unit structure 4.

The bottom end of the drill rod 1 is a conical structure, and the bottom end of the conical hole opening device 3 is a conical structure. The bottom ends of the drill rod 1 and the conical hole opening device 3 are both conical structures, which can effectively drill the soft sediments on the seabed surface, which is beneficial to reducing the resistance during the penetration process of the entire equipment.

The conical hole opening device 3 is provided with a mounting groove 7, and the resistance bracket 6 is installed in the mounting groove 7 and can be rotatably extended to the outside to form an inverted umbrella-like structure. When the penetration is completed, the operator of the survey ship issues a command to recover the drill pipe 1 at the deck end, and the conical hole opening device 3 releases the resistance bracket 6. The resistance bracket 6 of the inverted umbrella-like structure can increase the resistance with the seabed sediment, and when the drill pipe 1 is recovered upward, it can prevent the displacement of the sensor unit structure 4 caused by the recovery of the drill pipe 1.

The resistance bracket 6 is a plurality of paddles, which are hinged in the mounting grooves 7 . The numerical control module controls the paddles to rotate and stretch or to be retracted and stored in the mounting grooves 7 .

There are three blades, and three corresponding mounting grooves 7 are arranged, and the three mounting grooves 7 are evenly distributed around the outer periphery of the conical opening device 3. The blades and mounting grooves 7 are evenly distributed, so that the force is evenly applied, which is conducive to increasing the friction with the sediment.

The resistance bracket 6 is a rigid structure.

The sensor unit structure 4 is a flexible sensor chain, the lower end of which is mounted on the conical hole-opening device 3, and the upper end of which is connected to an underwater gripper or a float. The sensor unit structure 4 adopts a flexible sensor chain to prevent the conical hole-opening device 3 and the sensor unit structure 4 from disappearing together. The use of the flexible sensor chain together with the float is conducive to the later recovery work, thereby achieving the purpose of recovering data. The underwater gripper or float is not shown in the accompanying drawings. In this embodiment, the sensor unit structure 4 can adopt the following sensors: soil strength sensor, temperature sensor, sediment pore pressure sensor, resistivity sensor, tilt sensor, and the sensor unit structure 4 can be an independent individual or a collection of multiple sensors.

A method for using a conical hole opening device 3 for a deep seabed penetration probe, comprising: Next steps:

Step 1: insert the drill pipe 1 into the sleeve 2, the diameter-changing position of the drill pipe 1 is stuck in the sleeve 2, and the sensor unit structure 4 and the drill pipe 1 are released to penetrate into the seabed;

Step 2: Under the action of the conical hole opening device 3, the drill rod 1 and the sensor unit structure 4 are simultaneously penetrated into the seabed sediment, and the drill rod 1 contacts the seabed mud surface before the sensor unit structure 4;

Step 3: The operator operates the controller to send a command, and the numerical control module releases the resistance bracket 6 after receiving the signal. The resistance bracket 6 is distributed in an umbrella shape, and the drill pipe 1 is separated from the sleeve 2 and recovered to the survey ship. The sensor unit structure 4 and the conical hole opening device 3 remain on the seabed;

Step 4: Release the sensor unit structure 4 to put it in a relaxed and powerless state, the survey ship starts the monitoring mode, and the numerical control module performs long-term data collection and storage operations;

Step 5: The recovered drill rod 1 can continue to carry out other drilling operations;

Step 6: An underwater gripper or a float is installed on the top of the sensor unit structure 4. After completing the monitoring cycle, the operator remotely controls the unmanned submersible to grab the underwater gripper or the float to recover the sensor unit structure 4 and the conical opening device 3.

In this embodiment, when the entire drill rod 1 reaches the target depth in the sediment, the numerical control module releases a command, and the conical hole opening device 3 opens the originally closed resistance bracket 6. The resistance bracket 6 of the rigid structure can increase the friction between the device and the soil in the open and closed state, so that the entire drill rod 1 will not bring back the sensor unit structure 4 with the conical hole opening device 3 during the recovery process. Due to the structural characteristics of the drill rod 1 being thick at the upper end and thin at the lower end, it can pass directly through the casing during the recovery process. The recovery of the drill rod 1 will not affect the position of the conical hole opening device 3 and its attached sensor unit structure 4 in the sediment, effectively ensuring that the sensor unit structure 4 can carry out long-term in-situ monitoring, and the recovered drill rod 1 can continue to carry out other drilling operations. When the drill rod 1 is recovered, it may drive the casing upward a little, but due to the resistance of the resistance bracket 6, the error of the casing movement can be compensated, so that the position of the sensor unit structure 4 will not change.

After the device completes the penetration operation, the flexible sensor chain is then inserted into the seabed sediment. After the drill rod 1 is recovered, the flexible sensor chain is released to make it in a relaxed tension-free state. After the drill rod 1 is recovered, the flexible sensor chain stays on the seabed and starts the monitoring mode to perform long-term data collection and storage. After the detection cycle is completed, the remote-controlled unmanned submersible recovers the conical hole opening device 3, the flexible sensor chain and the floating ball. A data acquisition storage unit can be installed in the floating ball, so that even if the flexible sensor chain cannot be recovered, the emergency recovery of the floating ball can be completed, thereby achieving the purpose of recovering data.

In this embodiment, the numerical control module uses a processor, which can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The processor is the control center of the device, and various interfaces and lines are used to connect various parts.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims (8)

A conical hole-opening device for deep-sea seabed penetration probe, characterized in that it comprises a drill rod, a sleeve, a conical hole-opening device and a sensor unit structure; the sleeve is connected in parallel with the conical hole-opening device through a connecting plate; the diameter of the lower end of the drill rod is smaller than the diameter of its upper end, and the connection between the upper and lower ends is a diameter-changing position, and the drill rod is detachably inserted into the sleeve; the conical hole-opening device is provided with a resistance bracket and a numerical control module located inside the device, the numerical control module is communicatively connected to the operator's controller, the numerical control module is signal-connected to the resistance bracket and controls the extension or retraction of the resistance bracket; the sensor unit structure is installed on the conical hole-opening device; when the drill rod penetrates, the drill rod passes downward into the sleeve and is stuck in the sleeve at the diameter-changing position; after the penetration is completed, the operator operates the controller to send an instruction, and the numerical control module releases the resistance bracket after receiving the signal, and the drill rod is detached from the sleeve and recovered. According to claim 1, the conical hole opening device for deep seabed penetration probe rod is characterized in that the bottom end of the drill rod is a conical structure, and the bottom end of the conical hole opening device is a conical structure. According to claim 1, the conical hole opening device for use in deep-sea seabed penetration probes is characterized in that: the conical hole opening device is provided with a mounting groove, the resistance bracket is installed in the mounting groove and can be rotatably extended outward to form an inverted umbrella-shaped structure. According to claim 3, the conical hole-opening device for deep-sea seabed penetration probes is characterized in that: the resistance bracket is a plurality of paddle blades, the paddle blades are hinged in the mounting grooves, and the numerical control module controls the paddle blades to rotate and extend to open or to be retracted and stored in the mounting grooves. According to claim 4, the conical hole-opening device for deep-sea seabed penetration probes is characterized in that: the blades are provided with three pieces, the mounting grooves are correspondingly provided with three pieces, and the three mounting grooves are evenly distributed around the periphery of the conical hole-opening device. The conical hole opening device for deep-sea seabed penetration probe according to claim 1 is characterized in that the resistance bracket is a rigid structure. According to claim 1, the conical hole opening device for deep-sea seabed penetration probe is characterized in that the sensor unit structure is a flexible sensor chain, the lower end of the flexible sensor chain is installed on the conical hole opening device, and the upper end is connected to an underwater gripper or a float. A method for using a conical hole opening device for deep seabed penetration probe, wherein the method comprises: The characteristics include the following steps: Step 1: Insert the drill pipe into the sleeve, the diameter change position of the drill pipe is stuck in the sleeve, and the sensor unit structure and the drill pipe are released to penetrate the seabed; Step 2: Under the action of the conical hole opening device, the drill pipe and the sensor unit structure are synchronously penetrated into the seabed sediment, and the drill pipe contacts the seabed mud surface before the sensor unit structure; Step 3: The operator operates the controller to send a command, and the numerical control module releases the resistance bracket after receiving the signal. The resistance bracket is distributed in an umbrella shape, and the drill pipe is separated from the sleeve and recovered to the survey ship. The sensor unit structure and the conical opening device remain on the seabed; Step 4: Release the sensor unit structure to make it in a relaxed and powerless state, the survey ship starts the monitoring mode, and the CNC module performs long-term data collection and storage operations; Step 5: The recovered drill pipe can be used to continue other drilling operations; Step 6: An underwater grabber or float is installed on the top of the sensor unit structure. After completing the monitoring cycle, the operator remotely controls the unmanned submersible to grab the underwater grabber or float to recover the sensor unit structure and the conical opening device.