CN118855410B - Downhole casing electric punching device and punching method thereof - Google Patents
Downhole casing electric punching device and punching method thereof Download PDFInfo
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Abstract
本发明公开了一种井下套管电动打孔装置及其打孔方法，属于石油井下作业设备技术领域，包括安装管以及限位设备，所述限位设备安装在安装管端部，还包括：钻头，安装在安装管上，用于对套管进行打孔处理；主轴，转动连接在安装管上且与钻头固定连接，用于驱动钻头进行转动；推动机构，安装在安装管上，用于驱动主轴带动钻头进行线性运动；驱动机构，安装在安装管上，用于驱动主轴进行转动；其中，所述推动机构包括均安装在安装管内的第一伺服电机、第一减速器、梯形丝杠、轴承、螺母伸缩杆、鱼眼轴承、支撑架、三角板以及推筒；本发明能够对石油井下套管进行高效非爆炸性的打孔，用于平衡管柱之间的压力。
The invention discloses an electric drilling device for downhole casing and a drilling method thereof, belonging to the technical field of downhole petroleum operation equipment, comprising a mounting tube and a limiting device, wherein the limiting device is mounted at the end of the mounting tube, and further comprising: a drill bit, mounted on the mounting tube, and used for drilling the casing; a main shaft, rotatably connected to the mounting tube and fixedly connected to the drill bit, and used for driving the drill bit to rotate; a pushing mechanism, mounted on the mounting tube, and used for driving the main shaft to drive the drill bit to perform linear motion; a driving mechanism, mounted on the mounting tube, and used for driving the main shaft to rotate; wherein the pushing mechanism comprises a first servo motor, a first reducer, a trapezoidal lead screw, a bearing, a nut telescopic rod, a fisheye bearing, a support frame, a triangular plate, and a push cylinder, all of which are mounted in the mounting tube; the invention can perform efficient and non-explosive drilling on downhole casing of petroleum wells, and is used for balancing the pressure between pipe columns.
Description
Technical Field
The invention belongs to the technical field of petroleum underground operation equipment, and particularly relates to an underground casing electric punching device and a punching method thereof.
Background
At present, the electric punching prospect is clear, and compared with a traditional punching tool, the electric punching one-time stroke can realize punching and recycling of the puncher, so that the cost and complicated procedures of gunpowder transportation approval are avoided, and the operation is simple and convenient. The innovative design can quickly form a hole with controllable diameter on the tubular column at the target depth so as to recover the pipeline or dismantle the well pipe without using explosive.
Therefore, the invention provides an electric drilling tool for a downhole casing, which transmits torque to a drill bit by introducing a brushless motor driving transmission mechanism with the height Wen Zhiliu under the petroleum well, and can realize stable drilling and drilling operation under the action of a stable and reliable feeding mechanism, thereby solving the problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an underground casing electric punching device, which solves the problems.
The invention aims at realizing the technical scheme that the downhole casing electric punching device comprises a mounting pipe and limiting equipment, wherein the limiting equipment is arranged at the end part of the mounting pipe and further comprises:
the drill bit is arranged on the mounting tube and is used for punching the casing;
The main shaft is rotationally connected to the mounting tube and fixedly connected with the drill bit and is used for driving the drill bit to rotate;
the pushing mechanism is arranged on the mounting tube and used for driving the main shaft to drive the drill bit to perform linear motion;
The driving mechanism is arranged on the mounting tube and used for driving the main shaft to rotate;
The pushing mechanism comprises a first servo motor, a first speed reducer, a trapezoidal screw rod, a bearing, a nut telescopic rod, a fish eye bearing, a supporting frame, a triangular plate and a pushing barrel which are all installed in an installation tube, wherein the first speed reducer is installed on the first servo motor, the end part of the trapezoidal screw rod which is connected onto the installation tube through the bearing in a rotating mode is fixedly connected with the output end of the first speed reducer, a first limiting sliding groove which is in sliding fit with a limiting sliding block which is fixedly installed onto the installation tube is formed in the nut telescopic rod, the nut telescopic rod is in threaded connection with the trapezoidal screw rod, the fish eye bearing is fixedly connected with the free end of the nut telescopic rod, the supporting frame is detachably installed on the installation tube, the pushing barrel is sleeved on a main shaft and is in rotating connection with the main shaft, two corner ends of the triangular plate are hinged to the supporting frame and the free end of the connecting plate in a corresponding mode, and the other corner end of the triangular plate is in sliding fit with the pushing barrel.
Based on the technical scheme, the invention also provides the following optional technical schemes:
The driving mechanism comprises a first bevel gear, a second bevel gear, a rotating shaft, a second speed reducer and a second servo motor, wherein the first bevel gear is sleeved on the main shaft and is in sliding fit with a second limiting chute formed in the main shaft, the main shaft is rotationally connected with the mounting pipe, the second bevel gear is fixedly connected with the rotating shaft rotationally connected with the mounting pipe, the first bevel gear is fixedly connected with the rotating shaft, the second bevel gear is meshed with the first bevel gear, the second speed reducer and the second servo motor are both installed in the mounting pipe and are connected with the second servo motor, the second bevel gear is fixedly connected with the output end of the second speed reducer, and the second bevel gear is meshed with the first bevel gear.
The further technical scheme is that the device also comprises a detection component for detecting the rotation speed information of the drill bit, the displacement information of the drill bit and the pressing force information of the drill bit pressing the casing pipe, and the device comprises:
the pressure sensor is arranged between the drill bit and the main shaft and is used for detecting the pressing force of the drill bit;
The rotating speed sensor is arranged on the drill bit and used for detecting the rotating speed of the drill bit;
and the displacement sensor is arranged on the drill bit and used for detecting the displacement information of the drill bit.
A downhole casing perforating method, which uses the downhole casing electric perforating device to perforate, comprising the following steps:
s1, a related technician lowers the mounting pipe to the side part of the sleeve to be perforated, the drill bit is caused to face the perforation area of the sleeve, and at the moment, the limiting equipment is started to cause the mounting pipe to be attached to the side part of the sleeve;
S2, a first servo motor drives a first reducer to drive a trapezoidal screw rod to rotate, the trapezoidal screw rod drives a nut telescopic rod in threaded connection with the trapezoidal screw rod to linearly move along the length direction of an installation pipe, the nut telescopic rod drives a fisheye bearing to linearly move, the fisheye bearing drives a triangular plate to swing through a connecting plate, a main shaft is driven by the triangular plate to linearly move, at the moment, the pressure of the drill bit against a sleeve and the displacement information of the drill bit are correspondingly detected in real time by using a pressure sensor and a displacement sensor, first pressure information and the displacement information are obtained and transmitted to an external controller, the obtained first pressure information and the displacement information are correspondingly compared with a preset first pressure threshold and a displacement threshold, if any one of the first pressure information and the displacement information is not within the corresponding threshold, the drill bit is continuously driven to linearly move, after the first pressure information and the displacement information are within the corresponding threshold, the obtained first pressure information and the displacement information are led into a punching positioning model, a punching positioning condition coefficient is output, the obtained punching positioning condition coefficient is compared with the preset positioning coefficient, and if the obtained positioning coefficient is not within the threshold, and the positioning coefficient is continuously positioned within the punching condition coefficient;
S3, a second servo motor drives a second speed reducer to drive a second bevel gear to rotate, the second bevel gear pushes a first bevel gear meshed with the second bevel gear to rotate, a first bevel gear pushes a rotating shaft to drive a second bevel gear to rotate, the second bevel gear pushes the first bevel gear meshed with the second bevel gear to rotate, the first bevel gear further drives a main shaft to drive a drill bit to rotate, the first servo motor drives a first speed reducer to drive a trapezoidal screw to rotate, the trapezoidal screw pushes a nut telescopic rod in threaded connection with the trapezoidal screw to linearly move along the length direction of a mounting pipe, the nut telescopic rod pushes a fisheye bearing to linearly move, the fisheye bearing pushes a triangular plate to swing through a connecting plate, and the triangular plate pushes the main shaft to drive the drill bit to linearly move, so that the sleeve is perforated;
S4, in the punching process of S3, the pressure sensor and the rotating speed sensor are utilized to correspondingly detect the propping force of the drill bit to the sleeve and the rotating speed of the drill bit in real time, second propping force information and rotating speed information are obtained and transmitted to the peripheral sensor, the obtained second propping force information and rotating speed information are correspondingly compared with a preset second propping force threshold value and a preset rotating speed threshold value, and if the second propping force information exceeds the second propping force threshold value or the rotating speed information is not within the rotating speed information threshold value, the peripheral controller forms information for reducing the rotating speed of the drill bit and reducing the feeding speed of the drill bit and executes the information;
And S5, when the second pressing force information and the rotating speed information are within the corresponding threshold values, the second pressing force information and the rotating speed information are imported into a control model, a control condition coefficient is output, the obtained control condition coefficient is compared with a coefficient threshold value, and if the control condition coefficient exceeds the coefficient threshold value, the peripheral controller forms and executes the information of reducing the rotating speed of the drill bit and reducing the feeding speed of the drill bit until the control condition coefficient is within the coefficient threshold value.
The method comprises the following specific steps of importing the obtained first pressing force information and displacement information into a punching positioning model and outputting a punching positioning condition coefficient:
Performing dimensionless processing on the acquired first pressing force information and displacement information, and then guiding the first pressing force information and displacement information into a punching positioning model to output a punching positioning condition coefficient, wherein the punching positioning model is expressed as:
Wherein, For the purpose of locating the condition coefficients for the perforation,As the information of the first pressing force,As the displacement information, there is provided,As an influencing factor for the first abutment force,As an influencing factor for the displacement of the optical disc,,。
The method comprises the following specific steps of:
After dimensionless processing is carried out on the second pressing force information and the rotating speed information, the second pressing force information and the rotating speed information are imported into a control model, and control condition coefficients are output, wherein the control model is expressed as:
Wherein, In order to control the coefficient of the condition,As the information of the second pressing force,As the information of the rotational speed,As an influencing factor for the material of the sleeve,Is the influencing factor of the second abutment force,As an influencing factor for the rotational speed,,,。
The invention provides an underground casing pipe electric punching device which has the following beneficial effects compared with the prior art:
1. The method comprises the steps that a related technician lowers an installation pipe to the side part of a sleeve to be perforated, at the moment, a limiting device is started to enable the installation pipe to be attached to the side part of the sleeve, at the moment, a second servo motor drives a second speed reducer to drive a second bevel gear to rotate, the second bevel gear drives a first bevel gear meshed with the second bevel gear to rotate, a first bevel gear drives a rotating shaft to drive a second bevel gear to rotate, the second bevel gear drives a first bevel gear meshed with the second bevel gear to rotate, the first bevel gear further drives a main shaft to drive a drill bit to rotate, the first servo motor drives a first speed reducer to drive a trapezoidal screw to rotate, the trapezoidal screw drives a nut telescopic rod in threaded connection with the trapezoidal screw to linearly move along the length direction of the installation pipe, the nut telescopic rod drives a fish-eye bearing to linearly move, the fish-eye bearing drives a triangular plate to swing through a connecting plate, and the triangular plate drives the main shaft to drive the drill bit to linearly move, so that the sleeve is perforated;
2. According to the invention, the drill bit can be positioned before punching and drilling through the displacement information of the drill bit and the first pressing force information of the sleeve, the punching quality is evaluated through the second pressing force information and the rotating speed information, and the second pressing force information and the rotating speed of the sleeve are adjusted in real time.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is an enlarged schematic view of the structure of the portion a in fig. 1 according to the present invention.
Fig. 3 is an enlarged schematic view of the B-section structure of fig. 1 according to the present invention.
Fig. 4 is a schematic structural view of a nut telescopic rod according to the present invention.
Fig. 5 is a schematic installation diagram of the spindle and the push cylinder in the present invention.
The numerical reference annotates that 1, an installation pipe, 2, a limiting device, 3, a first servo motor, 4, a first speed reducer, 5, a trapezoidal screw rod, 6, a bearing, 7, a nut telescopic rod, 8, a fish eye bearing, 9, a support frame, 10, a triangular plate, 11, a main shaft, 12, a drill bit, 13, a first bevel gear, 14, a second bevel gear, 15, a first bevel gear, 16, a second bevel gear, 17, a rotating shaft, 18, a second speed reducer, 19, a second servo motor, 20, a first limiting chute, 21, a limiting slide block, 22, a push cylinder, 23 and a second limiting chute.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
Referring to fig. 1 to 5, for an embodiment of the present invention, an downhole casing electric punching device includes a mounting tube 1 and a limiting device 2, where the limiting device 2 is mounted at an end of the mounting tube 1, and further includes:
A drill bit 12 installed on the installation tube 1 for performing a punching process on the casing;
The main shaft 11 is rotationally connected to the mounting pipe 1 and fixedly connected with the drill bit 12 and is used for driving the drill bit 12 to rotate;
The pushing mechanism is arranged on the mounting tube 1 and is used for driving the main shaft 11 to drive the drill bit 12 to perform linear motion;
The driving mechanism is arranged on the mounting tube 1 and is used for driving the main shaft 11 to rotate;
The pushing mechanism comprises a first servo motor 3, a first speed reducer 4, a trapezoidal screw 5, a bearing 6, a nut telescopic rod 7, a fisheye bearing 8, a support frame 9, a triangular plate 10 and a pushing cylinder 22 (not shown in the figure), which are all installed in an installation tube 1, the first speed reducer 4 is installed on the first servo motor 3, the end part of the trapezoidal screw 5 connected on the installation tube 1 through the bearing 6 is fixedly connected with the output end of the first speed reducer 4, a first limit chute 20 which is in sliding fit with a limit slide block 21 fixedly installed on the installation tube 1 is formed on the nut telescopic rod 7, the nut telescopic rod 7 is in threaded connection with the trapezoidal screw 5, the fisheye bearing 8 is fixedly connected with the free end of the nut telescopic rod 7, the support frame 9 is detachably installed on the installation tube 1, the pushing cylinder 22 is sleeved on a spindle 11 and is in rotary connection with the spindle 11, the triangular plate is in rotary connection with a connecting plate (not shown in the figure), the two angular ends of the triangular plate 10 are respectively in sliding fit with the support frame 9 and the free end of the triangular plate 10 to drive the triangular plate 10 to linearly push the triangular plate 10 along the length of the spindle 10, namely, the triangular plate 10 is driven by the nut telescopic rod 10 to linearly move along the linear telescopic rod 4, and the linear telescopic rod is driven by the triangular rod 10, the linear telescopic rod is driven by the triangular rod 4, and the linear telescopic rod is driven by the threaded rod 4 to linearly move the threaded end of the threaded rod 10, and the threaded rod 4 is driven by the spindle 4, and the linear telescopic rod is driven by the spindle 4;
the driving mechanism comprises a first bevel gear 13, a second bevel gear 14, a first bevel gear 15, a second bevel gear 16, a rotating shaft 17, a second speed reducer 18 and a second servo motor 19, wherein the first bevel gear 13 is sleeved on the main shaft 11 and is in sliding fit with a second limit sliding chute 23 formed in the main shaft 11, the main shaft 11 is rotationally connected with the mounting tube 1, the second bevel gear 14 is fixedly connected with the rotating shaft 17 rotationally connected with the mounting tube 1, the first bevel gear 15 is fixedly connected with the rotating shaft 17, the second bevel gear 14 is meshed with the first bevel gear 13, the second speed reducer 18 and the second servo motor 19 are both installed in the mounting tube 1 and are connected with the second servo motor 19, the second bevel gear 16 is meshed with the first bevel gear 15, the second servo motor 19 drives the second bevel gear 18 to drive the second bevel gear 16 to rotate, the second bevel gear 16 pushes the first bevel gear 15 to rotate, the first bevel gear 15 is pushed by the second bevel gear 16 to rotate, and then the first bevel gear 14 is pushed by the second bevel gear 14 to rotate, and the first bevel gear 13 is pushed by the second bevel gear 14 to rotate, and then the first bevel gear 13 is meshed by the second bevel gear 13.
Preferably, the device further comprises a detection component for detecting rotation speed information of the drill bit 12, displacement information of the drill bit 12 and pressing force information of the drill bit 12 pressing the casing, and the device comprises:
a pressure sensor installed between the drill bit 12 and the spindle 11 for detecting the pressing force of the drill bit 12;
the rotating speed sensor is arranged on the drill bit 12 and is used for detecting the rotating speed of the drill bit 12;
a displacement sensor mounted on the drill bit 12 for detecting displacement information of the drill bit;
the pressure sensor and the rotation speed sensor are utilized to correspondingly monitor the pressing force and the rotation speed of the drill bit 12, so that the rotation speed of the drill bit 12 and the pressing force of the drill bit 12 to the sleeve are adjusted in real time.
In the embodiment of the invention, a related technician lowers the installation tube 1 to the side part of the sleeve to be perforated, at the moment, the limiting device 2 is started to enable the installation tube 1 to be attached to the side part of the sleeve, at the moment, the second servo motor 19 drives the second speed reducer 18 to drive the second bevel gear 16 to rotate, the second bevel gear 16 drives the first bevel gear 15 meshed with the second bevel gear 16 to rotate, the first bevel gear 15 drives the rotating shaft 17 to drive the second bevel gear 14 to rotate, the second bevel gear 14 drives the first bevel gear 13 meshed with the second bevel gear 14 to rotate, the first bevel gear 13 drives the main shaft 11 to drive the drill bit 12 to rotate, the first servo motor 3 drives the first speed reducer 4 to drive the trapezoidal screw 5 to rotate, the trapezoidal screw 5 drives the nut telescopic rod 7 in threaded connection with the trapezoidal screw 5 to linearly move along the length direction of the installation tube 1, the nut telescopic rod 7 drives the fish-eye bearing 8 to linearly move, the fish-eye bearing 8 swings through the connecting plate, the triangular plate 10 drives the main shaft 11 to drive the drill bit 12 to linearly move, and the sleeve is perforated.
A downhole casing perforating method, which uses the downhole casing electric perforating device to perforate, comprising the following steps:
S1, a related technician lowers the mounting tube 1 to the side part of the sleeve to be perforated, the drill bit 12 is caused to face the perforation area of the sleeve, and at the moment, the limiting device 2 is started to cause the mounting tube 1 to be attached to the side part of the sleeve;
S2, a first servo motor 3 drives a first reducer 4 to drive a trapezoidal screw 5 to rotate, the trapezoidal screw 5 pushes a nut telescopic rod 7 in threaded connection with the trapezoidal screw 5 to linearly move along the length direction of a mounting tube 1, the nut telescopic rod 7 pushes a fisheye bearing 8 to linearly move, the fisheye bearing 8 pushes a triangle 10 to swing through a connecting plate, the triangle 10 pushes a main shaft 11 to drive a drill bit 12 to linearly move, at the moment, a pressure sensor and a displacement sensor are utilized to correspondingly detect the pressure of the drill bit 12 against a sleeve and the displacement information of the drill bit 12 in real time, the first pressure information and the displacement information are obtained and transmitted to an external controller, the obtained first pressure information and the displacement information are correspondingly compared with a preset first pressure threshold and a preset displacement threshold, if any one of the first pressing force information and the displacement information is not within the corresponding threshold value, continuing to drive the drill bit 12 to perform linear motion, after the first pressing force information and the displacement information are both within the corresponding threshold value, importing the obtained first pressing force information and the displacement information into a punching positioning model, outputting a punching positioning condition coefficient, comparing the obtained punching positioning condition coefficient with a preset positioning coefficient threshold value, and if the punching positioning condition coefficient is not within the positioning coefficient threshold value, continuing to push the drill bit 12 to perform displacement until the punching positioning condition coefficient is within the positioning coefficient threshold value, wherein the obtained first pressing force information and the displacement information are imported into the punching positioning model, and outputting the punching positioning condition coefficient comprises the following specific steps:
Performing dimensionless processing on the acquired first pressing force information and displacement information, and then guiding the first pressing force information and displacement information into a punching positioning model to output a punching positioning condition coefficient, wherein the punching positioning model is expressed as:
Wherein, For the purpose of locating the condition coefficients for the perforation,As the information of the first pressing force,As the displacement information, there is provided,As an influencing factor for the first abutment force,As an influencing factor for the displacement of the optical disc,,;
S3, a second servo motor 19 drives a second speed reducer 18 to drive a second bevel gear 16 to rotate, the second bevel gear 16 pushes a first bevel gear 15 meshed with the second bevel gear 16 to rotate, the first bevel gear 15 pushes a rotating shaft 17 to drive a second bevel gear 14 to rotate, the second bevel gear 14 pushes a first bevel gear 13 meshed with the second bevel gear 13 to rotate, the first bevel gear 13 further drives a main shaft 11 to drive a drill bit 12 to rotate, the first servo motor 3 drives a first speed reducer 4 to drive a trapezoidal screw 5 to rotate, the trapezoidal screw 5 pushes a nut telescopic rod 7 in threaded connection with the trapezoidal screw 5 to linearly move along the length direction of a mounting tube 1, the nut telescopic rod 7 pushes a fish eye bearing 8 to linearly move, the fish eye bearing 8 pushes a triangular plate 10 to swing through a connecting plate, the triangular plate 10 pushes the main shaft 11 to drive the drill bit 12 to linearly move, and punching is carried out on the sleeve;
S4, in the punching process of S3, the pressure sensor and the rotating speed sensor are utilized to correspondingly detect the pressing force of the drill bit 12 to the sleeve and the rotating speed of the drill bit 12 in real time, second pressing force information and rotating speed information are obtained and transmitted to the peripheral sensor, the obtained second pressing force information and rotating speed information are correspondingly compared with a preset second pressing force threshold value and a preset rotating speed threshold value, and if the second pressing force information exceeds the second pressing force threshold value or the rotating speed information is not within the rotating speed information threshold value, the peripheral controller forms information for reducing the rotating speed of the drill bit 12 and reducing the feeding speed of the drill bit 12 and executes the information;
S5, when the second pressing force information and the rotating speed information are within the corresponding threshold values, the second pressing force information and the rotating speed information are imported into a control model, a control condition coefficient is output, the obtained control condition coefficient is compared with a coefficient threshold value, if the control condition coefficient exceeds the coefficient threshold value, the peripheral controller forms and executes information for reducing the rotating speed of the drill bit 12 and reducing the feeding speed of the drill bit 12 until the control condition coefficient is within the coefficient threshold value, wherein the specific steps for obtaining the control condition coefficient are as follows:
After dimensionless processing is carried out on the second pressing force information and the rotating speed information, the second pressing force information and the rotating speed information are imported into a control model, and control condition coefficients are output, wherein the control model is expressed as:
Wherein, In order to control the coefficient of the condition,As the information of the second pressing force,As the information of the rotational speed,As an influencing factor for the material of the sleeve,Is the influencing factor of the second abutment force,As an influencing factor for the rotational speed,,,。
It should be noted that in this document, relational terms such as a and B, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
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| CN202411356908.6A CN118855410B (en) | 2024-09-27 | 2024-09-27 | Downhole casing electric punching device and punching method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411356908.6A CN118855410B (en) | 2024-09-27 | 2024-09-27 | Downhole casing electric punching device and punching method thereof |
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| CN118855410B true CN118855410B (en) | 2024-11-29 |
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| NO312255B1 (en) * | 2000-06-28 | 2002-04-15 | Pgs Reservoir Consultants As | Tool for piercing a longitudinal wall portion of a casing |
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| CN116876978B (en) * | 2023-08-03 | 2024-06-07 | 深蓝(天津)智能制造有限责任公司 | Electric control drilling tool for underground pipe column |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116411801A (en) * | 2021-12-31 | 2023-07-11 | 中国石油天然气集团有限公司 | Downhole tool for radial drilling of high-temperature well, radial drilling operation system and method |
| CN116146133A (en) * | 2023-04-19 | 2023-05-23 | 西南石油大学 | High-frequency resonance type cement sheath crushing tool for assisting sleeve recovery |
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