CN-116181321-B - Underground communication system and implementation method thereof

CN116181321BCN 116181321 BCN116181321 BCN 116181321BCN-116181321-B

Abstract

The invention discloses an underground communication system and an implementation method thereof, wherein the system is used for realizing communication of a logging while drilling instrument and a rotary guiding tool, and comprises a single bus, first-type hooking equipment is hooked on the single bus and used for occupying the single bus by utilizing a first communication protocol, wherein data acquired by hooking equipment from different communication protocols are acquired in a preset complete communication period, second-type hooking equipment is hooked on the single bus and used for occupying the single bus by utilizing a second communication protocol, and a communication circuit is hooked on the single bus and used for transmitting the data acquired by the second-type hooking equipment to the first-type hooking equipment through time-sharing communication with the hooking equipment of different communication protocols, wherein the hooking equipment with different communication protocols does not occupy the single bus at the same moment. The invention improves the hooking efficiency of the logging while drilling instrument and the rotary guiding tool.

Inventors

ZHU ZUYANG
MI JINTAI
LI YONGJIE
LI GUOQING
ZONG YANBO
SONG HONGXI
SONG CHAOHUI
LIU JIANGTAO
HAN YUJIAO

Assignees

中国石油化工股份有限公司
中国石油化工股份有限公司石油工程技术研究院

Dates

Publication Date: 20260512
Application Date: 20211129

Claims (8)

1. A downhole communication system for enabling communication of a logging-while-drilling instrument with a rotary steerable tool, the system comprising: A single bus; the first type of hooking equipment is hooked on the single bus and is used for occupying the single bus by utilizing a first communication protocol, wherein data acquired by hooking equipment from different communication protocols are acquired in a preset complete communication period, and the first type of hooking equipment comprises a measurement while drilling instrument and a rotary guiding tool; a second type of hitching apparatus hitched to the single bus for occupying the single bus with a second communication protocol, the second type of hitching apparatus comprising a logging while drilling instrument; The communication circuit is connected with all the hanging devices through the single bus and is used for transmitting the data acquired by the hanging devices of the second type to the hanging devices of the first type through time-sharing communication with the hanging devices of different communication protocols, wherein the hanging devices with different communication protocols do not occupy the single bus at the same moment, the complete communication period comprises an internal communication period of the hanging devices of the first type and an external communication period of the hanging devices of the first type, The measurement while drilling instrument is used for firstly sending a guiding control instruction to the rotary guiding tool in a mode that the measurement while drilling instrument and the rotary guiding tool occupy the single bus in sequence in a time sharing way in a first working period in the internal communication period of the first type of hooking equipment, and then obtaining guiding feedback data sent by the rotary guiding tool; The external communication time period of the first type of hanging device comprises a second working time period to a sixth working time period which are sequentially arranged, wherein, The communication circuit is further configured to communicate with only the measurement while drilling instrument currently occupying the single bus during the second operation period, and then to communicate with only the logging while drilling instrument during the third operation period, so as to send a logging data request instruction from the measurement while drilling instrument to the logging while drilling instrument through the communication circuit; The logging while drilling instrument is also used for occupying the single bus in the fourth working period and completing instrument internal communication and logging data acquisition; The communication circuit is further configured to communicate with only the logging while drilling instrument currently occupying the single bus during the fifth operational period, and then to communicate with only the logging while drilling instrument during the sixth operational period to communicate the logging data from the logging while drilling instrument to the logging while drilling instrument via the communication circuit.
2. A downhole communication system according to claim 1, wherein, The measurement while drilling instrument is used for occupying the single bus in the first working period and sending first format information containing a guiding control instruction to the rotary guiding tool; the rotary guiding tool is used for analyzing the currently received information after receiving the first format information to obtain the guiding control instruction, executing guiding action under the control of the current instruction to generate the guiding feedback data, and finally sending the first format information containing the guiding feedback data information back to the measurement while drilling instrument.
3. A downhole communication system according to claim 1, wherein, The measurement while drilling instrument is used for occupying the single bus in the second working period and sending first format information containing logging data request instructions to the communication circuit; The communication circuit is used for analyzing after receiving the first format information, obtaining a logging data request instruction, generating second format information containing logging data request instruction information, and occupying the single bus in the third working period to send the second format information containing logging data request instruction to the logging while drilling instrument in the third working period.
4. A downhole communication system according to claim 3, wherein, The logging while drilling instrument is used for analyzing the information received currently after receiving the second format information sent by the communication circuit to obtain the logging data request instruction, executing a downhole resistivity measurement task by using the logging data request instruction in a fourth working period to obtain the logging data, and occupying the single bus in a fifth working period to send the second format information containing the logging data information to the communication circuit in the fifth working period.
5. The downhole communication system of claim 4, wherein the communication system further comprises a communication device, The communication circuit is used for analyzing the currently received information after receiving the second format information sent by the logging while drilling instrument to obtain the logging data, generating first format information containing logging data information, and occupying the single bus in the sixth working period to send the first format information containing logging data information to the logging while drilling instrument in the sixth working period; the measurement while drilling instrument is used for analyzing the information received currently after receiving the first format information sent by the communication circuit to obtain the logging data.
6. The downhole communication system of claim 4, wherein the logging while drilling instrument comprises: The resistivity main control circuit is used for occupying the single bus in the fourth working period after obtaining the logging data request instruction, sending second format information containing acquisition instruction information to the resistivity transmitting circuit, obtaining the logging data according to a resistivity feedback signal, and generating second format information containing logging data so as to output the current second format information in the fifth working period; and the resistivity transmitting circuit is used for analyzing the information received currently after receiving the second format information sent by the resistivity main control circuit to obtain the acquisition instruction, and generating a resistivity transmitting signal under the control of the acquisition instruction so that the resistivity main control circuit obtains the resistivity feedback signal.
7. The downhole communication system of claim 6, wherein the logging while drilling instrument is an electromagnetic wave logging instrument or an acoustic logging instrument.
8. A method for enabling downhole communication, the method being implemented by a downhole communication system according to any of claims 1-7, the method comprising: the method comprises the steps that first-type hanging equipment and second-type hanging equipment are hung on a single bus, wherein the first-type hanging equipment occupies the single bus by utilizing a first communication protocol, and the second-type hanging equipment occupies the single bus by utilizing a second communication protocol; Obtaining data collected by the first type of hitching apparatus; And the communication circuit transmits the data acquired by the second type of hanging equipment to the first type of hanging equipment in a time-sharing communication mode with the hanging equipment with different communication protocols, wherein the hanging equipment with different communication protocols does not occupy the single bus at the same time.

Description

Underground communication system and implementation method thereof Technical Field The invention relates to the technical field of logging while drilling, in particular to a downhole communication system for hooking a logging while drilling instrument with a rotary guiding tool and an implementation method thereof. Background Logging while drilling technology and rotary steering are key cores of modern well drilling and completion technology, the former is used for acquiring geophysical properties of underground rock and fluid in real time, and the latter is used for accurately controlling a drill bit to complete a complex three-dimensional borehole trajectory, and is a key technology for developing underground complex oil and gas resources. The logging while drilling technology mainly comprises the types of logging while drilling, electricity, nuclear logging and the like, and is carried out under the condition that the stratum is just drilled and mud invasion begins to occur, and the obtained data is a stratum parameter true value, so that the undisturbed stratum information can be reflected more truly. The rotary steering technology can replace the traditional mud motor and elbow joint, can rotate the directional well in the whole well section, has good effect of adjusting and controlling the track of the well bore, has high well bore quality and high drilling speed, has good well bore cleaning, and reduces the engineering risk of directional drilling. In the practical application process, the logging while drilling instrument and the rotary guiding tool are matched for use, a closed loop control system can be established in the drilling process, when the well track deviates from a target stratum, the logging while drilling instrument can timely measure information of the stratum to be drilled, analysis is carried out on the stratum information, analysis results are fed back to the rotary guiding tool, and then the rotary guiding tool timely controls the deflecting angle and deflecting direction to control the drill bit to reenter the target stratum. With the development of the rotary guiding tool and the logging while drilling instrument, the phenomena of various instrument types and instrument upgrading appear, the rotary guiding tool and the logging while drilling instrument are respectively self-organized, and both parties have own communication protocols and a set of complex ground debugging systems, so that the matched use is difficult. In view of the foregoing, there is a need in the art to provide a solution that can improve the efficiency of the hitching of a logging while drilling tool and a rotary steerable tool, so as to solve one or more of the above-mentioned problems. Disclosure of Invention In order to solve the technical problems, the invention provides a downhole communication system for realizing communication of a logging while drilling instrument and a rotary guiding tool, which comprises a single bus, first-type hooking devices, second-type hooking devices and communication circuits, wherein the first-type hooking devices are hooked on the single bus and are used for occupying the single bus by utilizing a first communication protocol, the data acquired by the hooking devices with different communication protocols are acquired in a preset complete communication period, the second-type hooking devices are hooked on the single bus and are used for occupying the single bus by utilizing a second communication protocol, and the communication circuits are connected with all the hooking devices through the single bus and are used for transmitting the data acquired by the second-type hooking devices to the first-type hooking devices through time-sharing communication with the hooking devices with different communication protocols, wherein the hooking devices with different communication protocols do not occupy the single bus at the same time. Preferably, the complete communication cycle includes a first type of hitching equipment internal communication period and a first type of hitching equipment external communication period, the first type of hitching equipment includes a measurement while drilling instrument and a rotary steering tool, the first type of hitching equipment internal communication period includes a first working period, wherein the measurement while drilling instrument is used for obtaining steering feedback data sent from the rotary steering tool in a manner that the measurement while drilling instrument and the rotary steering tool occupy the single bus in sequence in a time sharing manner in the first working period. The rotary steering tool is used for analyzing the currently received information after receiving the first format information to obtain the steering control instruction, executing steering action under the control of the current instruction to generate the steering feedback data, and finally sending the first format information containing the steering feed