CN-121976766-A - Integrated device of ultra-short radius coring and multidirectional coring technologies and application

CN121976766ACN 121976766 ACN121976766 ACN 121976766ACN-121976766-A

Abstract

The invention discloses an integrated device of ultra-short radius coring and multidirectional coring technology and application thereof, comprising a central control device and an upper hollow flange joint column arranged at the lower end of the central control device, wherein a rotary driving device is arranged below the upper hollow flange joint column, the bottom end of the upper hollow flange joint column is provided with a steering device for deviating the rotary driving device from a vertical axis, the driving end of the rotary driving device is detachably provided with a lower hollow flange Rong Xinzhu, and the bottom end of the lower hollow flange Rong Xinzhu is detachably provided with a drill bit assembly. The invention can lead the drill bit assembly to be aligned with different orientations of the well periphery in sequence for lateral or oblique coring so as to obtain a plurality of core samples on a radial section, and compared with the traditional rigid integral coring barrel, the design ensures the coring function and simultaneously greatly optimizes the space geometry of the tool so as to be more suitable for narrow and bent working space.

Inventors

GAO MINGZHONG
ZHAO XIYUAN
Tan Yuanling
He Kunchen
Yang Zundong
Yang Bengao
ZHANG YANG
ZHOU XUEMIN
YANG LEI
TANG RUIFENG
WANG YUNLONG
LUO CHANGYUAN

Assignees

四川大学

Dates

Publication Date: 20260505
Application Date: 20260213

Claims (9)

1. The integrated device is characterized by comprising a central control device (1) and an upper hollow flange connecting column (2) arranged at the lower end of the central control device (1), wherein a rotary driving device (4) is arranged below the upper hollow flange connecting column (2), a steering device (3) for enabling the rotary driving device (4) to deviate from a vertical axis is arranged at the bottom end of the upper hollow flange connecting column (2), a lower hollow flange Rong Xinzhu is detachably arranged at the driving end of the rotary driving device (4), and a drill bit assembly (6) is detachably arranged at the bottom end of the lower hollow flange Rong Xinzhu (5).
2. The integrated device of the ultra-short radius coring and multidirectional coring technology as set forth in claim 1, wherein the outer shell of the central control device (1) is made of high-strength titanium alloy, and a direction finding module, an attitude sensor, a data processing control unit and a communication module are integrated inside the outer shell.
3. The integrated device of the ultra-short radius coring and multidirectional coring technology as set forth in claim 1, wherein the steering device (3) comprises a main support arm (31) which is installed at the lower end of the upper hollow flange joint column (2) in a bolted manner through a flange, a steering shaft (33) which is installed at the lower position inside the main support arm (31) in a rotating manner through a bearing, and a connecting shell (34) which is fixed on the peripheral surface of the steering shaft (33), wherein the lower end of the connecting shell (34) is fixedly connected with the top end of the rotary driving device (4).
4. An ultra-short radius coring and multidirectional coring integrated apparatus according to claim 3, wherein a hydraulic speed reducing motor (32) is mounted on an inner wall of one side of said main support arm (31) through a bracket, and a belt transmission structure (35) for power transmission is mounted between an output shaft of said hydraulic speed reducing motor (32) and one end of a steering shaft (33).
5. The device for integrating the ultra-short radius coring and multidirectional coring technology as set forth in claim 4, wherein the main supporting arm (31) is provided with a protective shell on both the left and right outer walls thereof, and the belt transmission structure (35) comprises a driving multi-wedge wheel mounted on the output shaft of the hydraulic speed reducing motor (32) and a driven multi-wedge wheel mounted on one end of the steering shaft (33), and a multi-wedge belt is mounted between the driven multi-wedge wheel and the driving multi-wedge wheel.
6. The integrated device of ultra-short radius coring and multidirectional coring technology as set forth in claim 1, wherein the rotary driving device (4) comprises a casing (41) bolted at the lower end of the connection casing (34) and a hydraulic motor (42) mounted inside the casing (41), and the lower end of an output shaft of the hydraulic motor (42) penetrates to the outside of the casing (41) and is fixed with a flange plate (43).
7. An ultra-short radius coring and multidirectional coring integrated apparatus as set forth in claim 6, wherein said flange (43) is bolted to the upper end of the lower hollow flange Rong Xinzhu.
8. An integrated device for ultra-short radius coring and multidirectional coring according to claim 1, wherein said drill bit assembly (6) comprises a hollow drill stem (61) bolted to the lower end of the lower hollow flange Rong Xinzhu and a drill bit body (62) mounted to the bottom end of the hollow drill stem (61).
9. Use of an ultra-short radius coring and multidirectional coring technique, using an apparatus as claimed in any one of claims 1-8, comprising the steps of: s101, closely connecting all the components in sequence to form a complete underground tool string, wherein the tool string is put into a well through a drill string or a pipe cable, a worker confirms that a tool is in place through a ground monitoring system, then a starting instruction is sent to a central control device (1), the device performs self-checking, and the states of a steering device (3) and a rotary driving device (4) are confirmed to be normal; S102, a central control device (1) controls a steering device (3) and a rotary driving device (4) to work according to a control instruction of a worker, the steering device (3) is started to drive the rotary driving device (4) at the lower part, a lower hollow flange Rong Xinzhu and a drill bit assembly (6) to steer, the drill bit assembly (6) is aligned to a first target azimuth angle, after azimuth confirmation, the central control device (1) activates the rotary driving device (4) to start coring drilling of partially cutting into a stratum, a core is slowly sucked into the drill bit assembly (6) and the lower hollow flange Rong Xinzhu (5), after the preset rule of the point is completed, the rotary driving device (4) is stopped, the steering device (3) recovers the drill bit assembly (6) to be separated from a side wall and reset, and the core in the first azimuth is acquired; S103, continuing to command the steering device (3) to rotate the rotary driving device (4), the lower hollow flange Rong Xinzhu and the drill bit assembly (6) to the next preset azimuth through the central control device (1), repeating the processes of rotary positioning, steering, drilling coring and recovery resetting until the sampling in all the planned directions is completed at the depth point; And S104, after the tool string is completely put out, a technician disassembles and carefully takes out a plurality of sections of cores which are sequentially arranged in the lower hollow flange Rong Xinzhu and the drill bit assembly 6, numbering, wax sealing and preliminary description are carried out, and the samples are from different directions of the same depth point.

Description

Integrated device of ultra-short radius coring and multidirectional coring technologies and application Technical Field The invention relates to the technical field of geological drilling tools, in particular to an integrated device of ultra-short radius coring and multidirectional coring technologies and application thereof. Background In oil gas resource development and complex geological exploration engineering, the directional coring technology has important significance for acquiring an original sample of a specific horizon, analyzing physical properties of a reservoir and identifying a geological structure. However, existing coring devices present challenges in working in tight spaces such as ultra-short radius wellbores, large curvature sections, and the like. The conventional coring tool has the defects of high rigidity, long steering radius, difficulty in realizing multi-azimuth accurate positioning and sampling around a well, and lack of an integrated directional control and gesture feedback system, and cannot realize the functions of real-time closed-loop adjustment and multi-point multi-dimensional coring of a coring track. Therefore, it is desirable to develop a multi-directional coring integrated device that is compact in structure and capable of adapting to ultra-short radius conditions to achieve efficient, accurate, and reliable directional coring operations. Disclosure of Invention The invention aims to provide an ultra-short radius coring and multidirectional coring integrated device and application thereof, and after the device enters a target horizon of a well, multidirectional directional coring can be implemented, core samples with different angles can be obtained to analyze reservoir characteristics, so that the problems in the background art are solved. In order to achieve the above purpose, the technical scheme is that the integrated device of the ultra-short radius coring and multidirectional coring technology comprises a central control device and an upper hollow flange joint post arranged at the lower end of the central control device, wherein a rotary driving device is arranged below the upper hollow flange joint post, a steering device for enabling the rotary driving device to deviate from a vertical axis is arranged at the bottom end of the upper hollow flange joint post, a lower hollow flange Rong Xinzhu is detachably arranged at the driving end of the rotary driving device, and a drill bit assembly is detachably arranged at the bottom end of the lower hollow flange Rong Xinzhu. Preferably, the shell of the central control device is made of high-strength titanium alloy, and a direction finding module, an attitude sensor, a data processing control unit and a communication module are integrated inside the shell. Preferably, the steering device comprises a main support arm, a steering shaft and a connecting shell, wherein the main support arm is arranged at the lower end of an upper hollow flange joint column in a bolting way, the steering shaft is rotatably arranged in the main support arm at a position close to the lower part through a bearing, the connecting shell is fixed on the peripheral surface of the steering shaft, and the lower end of the connecting shell is fixedly connected with the top end of the rotary driving device. Preferably, a hydraulic speed reducing motor is installed on the inner wall of one side of the main support arm through a bracket, and a belt transmission structure for power transmission is installed between an output shaft of the hydraulic speed reducing motor and one end of a steering shaft. Preferably, the left and right outer walls of the main support arm are provided with protective shells, the belt transmission structure comprises a driving multi-wedge wheel arranged on an output shaft of the hydraulic speed reduction motor and a driven multi-wedge wheel arranged on one end of the steering shaft, and a multi-wedge belt is arranged between the driven multi-wedge wheel and the driving multi-wedge wheel. Preferably, the rotary driving device comprises a casing bolted at the lower end of the connecting casing and a hydraulic motor arranged in the casing, and the lower end of an output shaft of the hydraulic motor penetrates to the outside of the casing and is fixed with a flange plate. Preferably, the flange plate is bolted to the upper end of the lower hollow flange Rong Xin column. Preferably, the drill bit assembly includes a hollow drill stem bolted to the lower end of the lower hollow flange Rong Xin column and a bit body mounted at the bottom end of the hollow drill stem. The invention also provides an application of the ultra-short radius coring and multidirectional coring technology, and the device comprises the following steps: S101, closely connecting all the components in sequence to form a complete underground tool string, wherein the tool string is put into a well through a drill string or a pipe cable, a worker confirms that a tool i