CN-121993102-A - Automatic cleaning system and method for inner wall of drill rod

Abstract

The invention provides an automatic cleaning system and method for an inner wall of a drill rod, wherein the automatic cleaning system for the inner wall of the drill rod comprises a cleaning device, a speed control module and a driving module, the cleaning device is arranged in the drill rod, the speed control module is arranged on a top drive and connected with the driving module, the speed control module is configured to determine a target moving speed of the cleaning device, the driving module is arranged in a driller room and is configured to receive the target moving speed and control the cleaning device to move longitudinally in the drill rod. The automatic cleaning method for the inner wall of the drill rod can be carried out through the automatic cleaning system for the inner wall of the drill rod, and the cleaning method comprises the steps of lifting the drill rod by a top drive, controlling the braking force of a speed control module by a cleaning device according to the lifting distance of the top drive, moving the drill rod upwards, moving the cleaning device downwards, and always keeping a certain distance from the surface of a drill floor to realize the lifting cleaning. The invention has the advantages of ensuring that the cleaning device can move in the drill rod at the optimal speed, and simultaneously ensuring the cleaning effect and the operation safety.

Inventors

• XU FEIFAN
• GUO MINGYANG
• XU JIANCHAO
• YAN XIAOBING
• XIAO ZHOU
• XU QICONG
• ZHOU CHANGHONG
• TANG GUOQIANG
• WU JINGHENG
• CHEN WENCAI

Assignees

• 中国石油天然气集团有限公司
• 中国石油集团川庆钻探工程有限公司

Dates

Publication Date

20260508

Application Date

20241104

Claims (13)

1. 1. An automatic cleaning system for the inner wall of a drill rod is characterized by comprising a cleaning device, a speed control module and a driving module, wherein, The cleaning device is arranged in the drill rod to clean the inner wall of the drill rod; The speed control module is arranged on the top drive and connected with the driving module, and is configured to determine the target moving speed of the cleaning device; a drive module is disposed in the driller's room and configured to receive the target travel speed and control the cleaning device to move longitudinally within the drill pipe at the target travel speed.
2. 2. The automatic cleaning system for an inner wall of a drill pipe according to claim 1, wherein the determining a target movement speed of the cleaning device comprises: S1, determining a basic friction coefficient according to a drill rod material and a cleaning device material; S2, calculating basic friction resistance according to the weight of the cleaning device and the basic friction coefficient; s3, adjusting the basic friction resistance according to the design structure information of the cleaning device to obtain the optimized friction resistance; S4, determining a safe speed range of the cleaning device according to the optimized friction resistance, the response time of the speed control module and the maximum braking force; S5, selecting the target moving speed of the cleaning device from the safe speed range.
3. 3. The automatic cleaning system for the inner wall of the drill pipe according to claim 2, wherein the step S3 of adjusting the basic frictional resistance according to the design structure information of the cleaning device, the step of obtaining the optimized frictional resistance comprises: S31, determining whether a roller or a sliding rail exists in the cleaning device according to design structure information of the cleaning device, and if so, determining a first adjustment coefficient corresponding to the roller or the sliding rail; S32, determining the contact area between the cleaning device and the inner wall of the drill rod according to the design structure information of the cleaning device, and determining a second adjustment coefficient according to the contact area; s33, determining whether a lubrication system exists in the cleaning device according to the design structure information of the cleaning device, and if so, determining a third adjustment coefficient corresponding to the lubrication system; s34, determining a movement mode of the cleaning device when the cleaning device moves longitudinally along the drill rod according to the design structure information of the cleaning device, and determining a fourth adjustment coefficient according to the movement mode; and S35, adjusting the basic friction resistance according to the first adjustment coefficient, the second adjustment coefficient, the third adjustment coefficient and the fourth adjustment coefficient to obtain the optimized friction resistance.
4. 4. The automatic cleaning system for inner walls of drill pipes according to claim 3, wherein the movement pattern in S34 includes uniform speed, acceleration and deceleration.
5. 5. The automatic cleaning system for inner walls of drill pipes according to claim 2, wherein the determining in S4 a safe speed range of the cleaning device based on the optimized friction resistance, the response time of the speed control module, and the maximum braking force comprises: s41, determining the maximum acceleration of the cleaning device according to the optimized friction resistance and the braking force of the speed control module; S42, determining the maximum braking distance according to the initial speed, the maximum acceleration and the response time of the speed control module of the cleaning device; s43, determining the safe speed range of the cleaning device according to the maximum braking distance.
6. 6. The pipe inner wall automatic cleaning system according to claim 5, wherein the response time of the speed control module in S42 comprises a time delay from receiving a brake signal to the onset of a braking force.
7. 7. The automatic cleaning system for inner walls of drill pipes according to claim 5, wherein determining the safe speed range of the cleaning device according to the maximum braking distance in S43 comprises: S431, determining a safe braking distance according to the maximum braking distance and the safety specification of the current construction environment; S432, determining the safety speed range of the cleaning device according to the safety braking distance.
8. 8. The automatic cleaning system for inner wall of drill pipe according to claim 2, wherein selecting the target moving speed of the cleaning device from the safe speed range in S5 comprises: s51, determining target cleaning time according to the size information of the drill rod and the pollution state inside the drill rod; s52, determining a target cleaning speed according to the target cleaning time; And S53, verifying whether the target cleaning speed falls into a safe speed range, if so, determining the target cleaning speed as the target moving speed of the cleaning device.
9. 9. The automatic cleaning system for the inner wall of a drill pipe according to claim 1, wherein the cleaning device comprises a contact sensor, an image acquisition module, a sound acquisition module and a feedback module, wherein, The contact sensor is configured to collect a contact pressure between the cleaning device and the inner wall of the drill rod; the image acquisition module is configured to analyze the tightness of the contact surface between the cleaning device and the inner wall of the drill rod according to an image processing technology; the sound collection module is configured to collect sound information of the cleaning device when the inner wall of the drill rod is cleaned; the feedback module is configured to determine speed adjustment information of the cleaning device based on the contact pressure, the tightness and the sound information.
10. 10. The automatic cleaning system for an inner wall of a drill pipe according to claim 9, wherein the image acquisition module, according to an image processing technique, analyzes the tightness of the contact surface between the cleaning device and the inner wall of the drill pipe, comprises: A1, acquiring an image of a contact surface between a cleaning device and the inner wall of a drill rod; a2, analyzing the contact surface image by using an edge detection algorithm to obtain a contact edge between the cleaning device and the inner wall of the drill rod; A3, calculating the width or area of the contact surface according to the contact edge; and A4, determining the tightness degree of the contact surface between the cleaning device and the inner wall of the drill rod according to the width or the area of the contact surface.
11. 11. The automatic pipe inner wall cleaning system according to claim 9, wherein the feedback module determines the speed adjustment information of the cleaning apparatus based on the contact pressure, the tightness and the sound information, comprising: B1, carrying out normalization treatment on the contact pressure to obtain a normalized contact pressure value; b2, converting the tightness into a digital tightness index and a cleaning effect; B3, extracting a target sound characteristic value related to the cleaning process from the sound information; b4, calculating the contact pressure value, the target sound characteristic value and the tightness of the numerical form by adopting a weighted summation method, and calculating to obtain a comprehensive evaluation index; And B5, if the comprehensive evaluation index is higher than the set cleaning index value, determining that the speed regulation information of the cleaning device is kept or accelerated within a set range, and if the comprehensive evaluation index is lower than the set cleaning index value, determining that the speed regulation information of the cleaning device is decelerated.
12. 12. The automatic cleaning system for the inner wall of the drill rod according to claim 1, wherein the driving module receives the target moving speed from the speed control module through a low-frequency electromagnetic wave communication system, and the low-frequency electromagnetic wave communication system comprises a 10-20 kHz low-frequency electromagnetic wave communication system.
13. 13. An automatic cleaning method for an inner wall of a drill pipe, wherein the cleaning method is performed by the automatic cleaning system for an inner wall of a drill pipe according to any one of claims 1 to 12, and the cleaning method comprises: The top drive lifts the drill rod, and the cleaning device controls the braking force of the speed control module according to the lifting distance of the top drive; the drill rod moves upwards, the cleaning device moves downwards, and the distance between the cleaning device and the drill floor surface is kept 0.5-1 meter all the time, so that the drill lifting cleaning is realized.

Description

Automatic cleaning system and method for inner wall of drill rod Technical Field The invention relates to the technical field of drilling, in particular to a system and a method for automatically cleaning the inner wall of a drill rod. Background In the drilling process of an oil-gas well, various working conditions such as drilling tool changing, short lifting, well dredging and the like relate to the lifting operation, in order to keep the safety of driller operation and clean of the drilling floor, the drill rod is usually required to be cleaned in the lifting process, and the outer wall of the drill rod is cleaned at present, however, due to the lack of the inner wall cleaning technology of the drill rod, the slurry on the drilling floor is still spread in the lifting process. A plurality of drill rod cleaners are invented at home and abroad, and the problems of low moving efficiency, poor cleaning speed control and the like of the cleaners in the drill rod exist at present. Therefore, the automatic cleaning system and the method for the inner wall of the drill rod have important significance. The Chinese patent with the application number of CN201710717843.7 and the name of ultrasonic cleaner and cleaning method for the inner wall of the rope coring drill rod discloses an ultrasonic cleaner and cleaning method for the inner wall of the rope coring drill rod, wherein the ultrasonic cleaner consists of a power plug, an ultrasonic power control generator, a power switch, a gear control switch, a cable, a cylindrical bracket, a transducer and an amplitude transformer. The power plug is connected with the ultrasonic power control generator, and the power switch and the gear control switch are arranged on the ultrasonic power control generator. The cylindrical support is connected with the ultrasonic control generator through a cable. The amplitude transformer is arranged at the top end of the transducer, and the amplitude transformer and the transducer are uniformly distributed on the side surface and the bottom surface of the cylindrical support. The ultrasonic wave generated by the transducer is transmitted into the drilling fluid after the intensity is increased by the amplitude transformer. The equipment utilizes cavitation generated by ultrasonic waves in liquid to realize the purpose of in-situ cleaning and pasting mud skin on the inner wall of the drill rod, and compared with the prior art, the equipment has the advantages of low cost, thorough cleaning, convenience, time and labor saving and environmental protection. However, the cleaner has no function of controlling and adjusting the speed of the cleaning device unlike the cleaning system of the present application. Disclosure of Invention The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, it is an object of the present invention to provide an automatic cleaning system for the inner wall of a drill pipe that is rational in construction and in which the cleaning device can be moved within the drill pipe at an optimal speed. As another example, another object of the present invention is to provide an automatic cleaning method for an inner wall of a drill pipe, which can ensure the cleaning effect of the inner wall of the drill pipe and the safety of the cleaning operation. In order to achieve the above object, according to one aspect of the present invention, there is provided an automatic cleaning system for an inner wall of a drill pipe, the cleaning system including a cleaning device, a speed control module and a driving module, wherein the cleaning device is disposed in the drill pipe to clean the inner wall of the drill pipe, the speed control module is disposed on a top drive and connected with the driving module, the speed control module is configured to determine a target moving speed of the cleaning device, and the driving module is disposed in a driller room and configured to receive the target moving speed and control the cleaning device to move in a longitudinal direction in the drill pipe at the target moving speed. According to one or more exemplary embodiments of an aspect of the present invention, the determining the target moving speed of the cleaning device may include determining a basic friction coefficient according to a drill rod material and a cleaning device material, calculating a basic friction resistance according to a cleaning device weight and the basic friction coefficient, S3 adjusting the basic friction resistance according to design structure information of the cleaning device to obtain an optimized friction resistance, S4 determining a safe speed range of the cleaning device according to the optimized friction resistance, a response time of a speed control module and a maximum braking force, and S5 selecting the target moving speed of the cleaning device from the safe speed range. According to one or more exemplary embodiments of the aspect of the pr