A drilling-while-measuring, gamma logging and resistivity logging integrated drilling control device

Abstract

The application discloses a drilling measurement, gamma logging and resistivity logging integrated drilling measurement and control device, which comprises detachably connected resistivity measurement units, drilling measurement units and gamma measurement units; each measurement module unit is a cylindrical structure with the same radius, and is mechanically connected through a male and female buckle structure; a male buckle joint and a female buckle joint of the male and female buckle structure are respectively arranged at two ends of each measurement module unit; and the butt joint end faces of the male buckle joint and the female buckle joint are respectively provided with corresponding annular wiring grooves; a through bus channel is arranged in each measurement module unit; a conductive metal ring is inlaid in the annular wiring groove; one end of a bus joint is located in the annular wiring groove; after the male and female buckle structure is butted, the conductive metal ring is in contact with the bus joint end portions in the annular wiring grooves of the male buckle joint and the female buckle joint; and the bus joint is electrically connected with a single bus circuit in each measurement module unit through a single bus wire in the bus channel.

Description

Technical Field

[0001] This invention relates to the field of oil drilling logging technology, and in particular to an integrated drilling measurement and control device suitable for rotary steerable systems, which combines measurement while drilling, gamma logging, and resistivity logging. Background Technology

[0002] Logging while drilling (LOD) is a core technology for obtaining downhole formation parameters in oil and gas exploration and development. LOD, gamma logging, and resistivity logging are the three most critical logging indicators, used to obtain drilling engineering parameters, formation lithology parameters, and formation physical property parameters, respectively. In existing technologies, these three types of logging functions are mostly implemented through independent measurement modules. Each module adopts a separate design for downhole assembly, which has the following technical defects: the connection methods of each module are not uniform, and special connectors are often used for assembly, resulting in complex connections, low assembly efficiency, and easy loosening in the strong vibration environment downhole, leading to signal transmission interruption and affecting the continuity of data acquisition; each module has its own independently designed power supply and communication lines, resulting in cumbersome wiring, easy signal interference, and high communication delay, making it impossible to achieve synchronous acquisition and real-time transmission of multiple parameters; there is a lack of systematic sealing and vibration resistance design, and the sealing structures of each module are independent, resulting in low overall sealing level, which is prone to sealing failure and insulation degradation under the high temperature and high pressure conditions of deep wells; the modularity and universality are low, and each module is designed with special dimensions, making it impossible to freely combine and adjust the module order according to the actual needs of directional drilling, resulting in low equipment reuse rate and increased equipment procurement and maintenance costs for drilling operations; existing technologies have not achieved an integrated design of the three types of logging modules, and multiple downhole assembly of different modules is required for multi-parameter acquisition, which significantly increases drilling downtime and reduces overall operational efficiency.

[0003] Currently, while some optimized designs exist for individual logging modules, the integration of structure, power supply, and communication for measurement-while-drilling (MWD), gamma ray logging, and resistivity logging modules is not yet fully realized. Furthermore, a systematic design for the sealing, vibration resistance, and modular combination of integrated instrument strings is lacking, making it difficult to meet the demands of complex well configurations for multi-parameter, high-precision, and high-reliability MWD. ​​Therefore, there is an urgent need for a compact, reliable, and modularly universal integrated MWD device to achieve the integration and synchronization of the three types of logging functions, adapting to harsh downhole conditions and diverse directional drilling operations. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an integrated drilling measurement and control device that combines measurement while drilling, gamma logging, and resistivity logging. This device enables real-time, synchronous acquisition and transmission of multiple formation parameters in downhole conditions characterized by high temperature, high pressure, and strong vibration, and is suitable for directional drilling operations with complex well configurations.

[0005] This invention achieves this objective through the following technical solution: An integrated measurement-while-drilling (MWD) control device combining measurement-while-drilling (MSW), gamma-ray logging, and resistivity logging includes a detachably connected resistivity measurement unit, a MWD unit, and a gamma-ray measurement unit. The MWD unit, gamma-ray measurement unit, and resistivity measurement unit are cylindrical structures of the same radius, mechanically connected via a male-female threaded connection. The male and female threaded connectors of the male-female threaded connection are located at opposite ends of the MWD unit, gamma-ray measurement unit, and resistivity measurement unit, respectively. Corresponding annular wiring grooves are formed on the mating surfaces of the male and female threaded connectors. A continuous bus channel is provided inside each MWD unit, gamma-ray measurement unit, and resistivity measurement unit. A conductive metal ring is embedded within the annular wiring groove. One end of the bus connector is located within the annular wiring groove. After the male-female threaded connection is connected, the conductive metal ring contacts the end of the bus connector within the annular wiring groove of the male and female threaded connectors. The bus connector is electrically connected to the single-bus circuit within each measurement module unit via a single-bus wire within the bus channel.

[0006] Furthermore, the measurement-while-drilling (MWD) unit includes a MWD body and, sequentially, a resistivity probe clamping sleeve, an upper fixed sub, a quick-connect coupling, a quick-connect pressure ring, an upper electronic compartment connector, an outer electronic compartment cylinder, a circuit frame, and a lower electronic compartment connector. The upper end of the MWD body is a female threaded connector, and the lower end is a male threaded connector. The resistivity probe clamping sleeve is nested inside the upper part of the MWD body. The upper fixed sub is coaxially sleeved within the body and nested with the quick-connect coupling. The quick-connect pressure ring is installed inside the quick-connect coupling. The upper end of the upper electronic compartment connector is fitted with... The quick-connect connector is fixed to the upper fixed short section by a pin. The lower end of the upper connector of the electronic compartment is connected to the circuit frame. The outer sleeve of the electronic compartment is fitted over the lower end of the upper connector, the circuit frame, and the upper end of the lower connector. The outer walls of the upper and lower connectors of the electronic compartment are provided with annular sealing grooves, and sealing rings are installed in the grooves. The outer sleeve of the electronic compartment is equipped with a circuit frame and integrates a single-bus core electronic component. The circuit frame is connected to the bus connectors on the female and male connectors at both ends of the measurement-while-drilling body through a single-bus wire that passes through the bus channel.

[0007] Furthermore, the gamma measurement unit includes a gamma body, a lower outer cylinder, and a lower connector. The gamma body is an integrated structure of an outer shell and an internal electronic compartment. The outer shell has a battery compartment opening, a data interface, and a pressure sensor interface. The internal electronic compartment integrates a power module, a main control storage module, a pressure / gamma signal processing module, two high-voltage power modules, and two gamma detection modules. The upper end of the gamma body is a female connector, and the lower outer cylinder is fitted under the lower part of the gamma body. The lower end of the gamma body and the upper end of the lower connector are connected by a male-female connector structure. The lower end of the lower connector is a male connector. The gamma body and the lower connector are respectively provided with bus channels and are electrically connected through conductive ring assemblies. The bus channels in the gamma body are connected to the circuits of each module in the internal electronic compartment, and the bus channels in the lower connector are connected to the bus connector on the male connector.

[0008] Furthermore, the resistivity measurement unit includes a resistivity body, six separate coil assemblies, and a cover plate assembly. The resistivity body has six annular grooves on its surface. The coil assemblies have a four-transmitter, two-receiver structure, with left and right half-ring structures installed in the annular grooves, supporting two transmission frequencies and two transmit / receive distances. The lower end of the resistivity body has a male connector, and the upper end has a female connector. The lower side wall of the resistivity body has a screw plug. The cover plate assembly includes different types of cover plates arranged alternately along the axial direction of the resistivity body. Each cover plate contains an integrated circuit module. Through holes are provided between adjacent cover plates to form a bus channel with a single bus. Each integrated circuit module is connected to the bus connectors on the female and male connectors at both ends of the measurement-while-drilling body through a single bus wire that passes through the bus channel.

[0009] Furthermore, there are two conductive metal rings. Each conductive metal ring is covered with a rubber sealing ring on the three sides other than the annular mating end face. The rubber sealing ring and the conductive metal ring are interference-fitted and embedded into the annular wiring groove. The rubber sealing ring at the contact position between the conductive metal ring and the bus connector end face has an opening.

[0010] Furthermore, a first PEEK ring is provided at the root of the external thread of the lower male thread connector of the resistivity measurement unit, the drilling measurement unit, and the gamma measurement unit.

[0011] Furthermore, the male threaded connectors at the lower ends of the resistivity measurement unit, the measurement while drilling unit, and the gamma measurement unit are provided with end face plugs.

[0012] Furthermore, the gamma body is fitted with an upper copper ring and a lower cylindrical ring. The upper copper ring is located above the lower outer cylinder and abuts against the lower outer cylinder, while the lower copper ring is located between the lower outer cylinder and the lower connector and abuts against both.

[0013] Furthermore, the conductive ring assembly includes a first elastic conductive semi-ring, a second elastic conductive semi-ring, a conductive ring copper ring, and a second PEEK ring; wherein, the first elastic conductive semi-ring and the second elastic conductive semi-ring are two symmetrical semi-circular rings, respectively set in annular grooves on the gamma body, and joined together to form a ring structure; the inner side of the conductive ring copper ring abuts against the outer wall of the first elastic conductive semi-ring and the second elastic conductive semi-ring, the second PEEK ring is located outside the conductive ring copper ring, the second PEEK ring is made of insulating material, the ring body has a dedicated wire groove, the connection between the wire groove and the internal bus channel of the lower connector has an opening, the single bus wire from the internal bus channel of the lower connector is directly connected to the outer wall of the conductive ring copper ring through the wire groove, and the bus connector at the end of the bus channel on the gamma body side is connected to the wire connecting the first elastic conductive semi-ring and the second elastic conductive semi-ring.

[0014] Furthermore, a guide ring is fitted under the gamma body, located between the outer surface of the gamma body and the inner wall of the lower connector, for axial guidance when docking with the lower connector.

[0015] Compared with the prior art, the beneficial effects of this invention are as follows: This invention solves the problems of existing logging modules, such as separate design, complex connections, significant signal interference, poor sealing and vibration resistance, and low modular versatility. It enables the synchronous acquisition and real-time transmission of formation engineering parameters, lithological parameters, and physical property parameters, significantly improving the efficiency, accuracy, and reliability of logging while drilling, while reducing equipment and time costs in drilling operations. This invention features a modular and reconfigurable structure; the module connection sequence can be adjusted, individual modules can be independently replaced, it is compatible with various specifications of rotary steering systems, and can be freely combined with other logging modules. It can simultaneously acquire drilling engineering parameters, formation gamma parameters, resistivity parameters, and downhole pressure parameters, achieving real-time transmission of multiple parameters. This solves the problems of complex connections, significant signal interference, poor sealing and vibration resistance, and low versatility in existing logging modules, significantly improving the efficiency, accuracy, and reliability of logging while drilling, and reducing equipment and time costs in drilling operations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the integrated drilling measurement and control device of the present invention; Figure 2 This is a partially enlarged view of the single-bus connection structure at the male and female fastener mating part of the present invention; Figure 3 This is an enlarged cross-sectional view of the connection structure between the gamma measurement unit and the lower connector of the present invention; Figure 4 This is a partially enlarged cross-sectional view of the internal conductive components of the gamma measurement unit of the present invention.

[0017] The attached figures are labeled as follows: 1-Resistivity measurement unit, 2-Resistivity body, 3-Coil assembly, 4-Measurement while drilling unit, 5-Measurement while drilling body, 6-Measurement while drilling electronic chamber, 7-Gamma measurement unit, 8-Gamma body, 9-Gamma electronic chamber, 10-Lower outer cylinder, 11-Lower connector, 12-Male connector, 13-Female connector, 14-Conductive metal ring, 15-Bus channel, 16-First PEEK ring, 17-Rubber sealing ring, 18-First elastic conductive half-ring, 19-Second elastic conductive half-ring, 20-Conductive copper ring, 21-Second PEEK ring, 22-Guide ring, 23-Upper copper ring, 24-Lower copper ring. Detailed Implementation

[0018] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] This invention provides an integrated drilling measurement and control device that combines measurement while drilling, gamma logging, and resistivity logging, such as... Figure 1 As shown, from top to bottom, the device includes a detachable resistivity measurement unit 1, a measurement-while-drilling (MWD) unit 4, and a gamma measurement unit 7. The MWD unit 4, gamma measurement unit 7, and resistivity measurement unit 1 are cylindrical connectors with the same outer diameter. They are coaxially and detachably mechanically connected through a standard male-female thread structure. Each measurement module unit has a through bus channel. The power supply can supply power to the module circuits in each measurement module unit through a single bus wire in the bus channel. The single bus wire is covered with an insulation layer and can be directly inserted into the bus channel in the metal material to achieve electrical isolation. The single bus enables unified power supply and signal communication for the entire integrated MWD device. Each measurement module unit has a first PEEK ring 16, a rubber sealing ring 17, and a conductive metal ring 14 at the connection point, forming a mechanically stable, electrically reliable, and well-sealed integrated instrument string, suitable for downhole high temperature, high pressure, and strong vibration conditions.

[0020] like Figure 2As shown, cross-module communication of the single bus between each measurement module unit is achieved through the conductive metal ring 14 on the mating end face of the male and female connector. The conductive metal ring 14 is directly electrically connected to the single bus circuit in the bus channel 15 inside each module. The mating end faces of the male and female connectors of resistivity measurement unit 1, drilling measurement unit 4, and gamma measurement unit 7 are all provided with annular wiring grooves. One end of the bus connector of the bus channel port inside each measurement unit is located in the annular wiring groove. The conductive metal ring 14 reserves one annular surface as the mating end face, and the other three surfaces are covered by rubber sealing rings 17. The rubber sealing rings 17 and conductive metal rings 14 are interference-fitted and embedded together in the annular wiring groove of the male and female connector end face. Inside, the outer side of the rubber sealing ring 17 is tightly fitted to the inner wall of the annular wiring groove, achieving a seal between the conductive metal ring 14 and the groove body, preventing well fluid intrusion and causing a short circuit. The rubber sealing ring 17 has an opening at the contact position between the conductive metal ring 14 and one end of the bus connector located in the annular wiring groove, for connecting the single bus wire. During the screwing and locking process of the male and female buckle, the mating end faces of the two conductive metal rings 14 gradually fit together as the male and female buckle is screwed together. After screwing into place, the mating end faces of the two conductive metal rings 14 are tightly pressed together by the extrusion force. The other end of the bus connector is connected to the single bus wire in the bus channel inside each measurement module unit, thereby realizing the conduction of the single bus circuit between the measurement module units.

[0021] The lower male thread of the resistivity measurement unit, the measurement while drilling unit, and the gamma measurement unit is equipped with a first PEEK ring at the root of the external thread. The end face of the male thread is provided with an end face plug to achieve insulation and structural guidance of the connection parts, thereby improving the overall pressure resistance and leakage prevention performance of the instrument string.

[0022] This invention abandons the traditional single mechanical connection method and designs an integrated dedicated interface that combines a standard male-female threaded mechanical structure, a sealing system, and a through-type bus routing channel, providing a comprehensive solution for the splicing of measurement module units. The mechanical connection adopts a vibration-resistant standard male-female threaded structure specifically for oil well logging, combined with a first PEEK ring 17 seal, to ensure the overall coaxiality of the instrument string, offsetting structural offsets and loosening caused by strong drilling vibrations, and achieving the stability of the mechanical connection; the bus routing precisely connects with the internal channels of each measurement module unit at the interface, realizing a fully through-type single bus channel that runs through the interface and module, providing a physical basis for unified power supply and synchronous signal transmission, and avoiding signal interference from cross-module routing.

[0023] When connecting the modules, firstly, the standard male and female snap-fit ​​connectors are screwed together and locked to complete the mechanical connection. At the same time, the first PEEK ring 16 is pre-fitted onto the outside of the male snap-fit ​​connector 12. After the male snap-fit ​​connector 12 and the female snap-fit ​​connector 13 are screwed into place, the female snap-fit ​​connector 13 presses the first PEEK ring 16 between the male snap-fit ​​connector 12 and the female snap-fit ​​connector 13 to achieve sealing and positioning. The bus channel inside each measurement module unit is precisely connected to the bus connector located at the interface in the annular wiring groove to complete the connection of the single bus and realize the physical connection of unified power supply and signal transmission.

[0024] The measurement-while-drilling (MWD) unit 4 includes a MWD body 5 and an internal MWD electronic compartment 6. The MWD electronic compartment 6, from top to bottom, consists of a resistivity probe clamping sleeve, an upper fixed sub, a quick-connect coupling, a quick-connect pressure ring, an upper electronic compartment connector, an outer electronic compartment cylinder, a circuit frame, and a lower electronic compartment connector 11. The upper end of the MWD body 5 has a female threaded connector 13, and the lower end has a male threaded connector 12. The resistivity probe clamping sleeve is nested inside the upper part of the MWD body 5. The upper fixed sub is coaxially sleeved inside the MWD electronic compartment 6 and connects with the quick-connect coupling. The quick-connect connectors are nested together; the quick-connect pressure ring is installed inside the quick-connect connector; the upper end of the upper connector of the electronic compartment is fitted into the quick-connect connector and fixed to the upper fixed short section by a pin; the lower end of the upper connector of the electronic compartment is connected to the circuit frame; the outer cylinder of the electronic compartment is fitted around the lower end of the upper connector of the electronic compartment, the circuit frame, and the upper end of the lower connector 11 of the electronic compartment; the outer peripheral walls of the upper connector and the lower connector 11 of the electronic compartment are provided with annular sealing grooves, and sealing rings are installed in the grooves to achieve radial sealing. The circuit frame is located inside the outer cylinder of the electronic compartment and is used to integrate single-bus communication and control circuits. The circuit frame is connected to the bus connectors in the annular wiring grooves of the female connector 13 and male connector 12 located at both ends of the measurement-while-drilling body through the bus channel via single-bus wires. The upper part of the measurement-while-drilling body 5 is also provided with a measurement line socket for realizing bidirectional signal transmission and command interaction between the logging equipment and the surface control system.

[0025] The measurement while drilling unit 4 collects drilling engineering parameters (such as well inclination, azimuth, tool face angle, etc.) through electronic components integrated in its internal circuit skeleton, and transmits the parameters to the main control storage module of the gamma measurement unit 7 via a single bus. It also serves as a bridge for communication between the entire integrated measurement while drilling device and the ground.

[0026] The gamma measurement unit 7 includes a gamma body 8, a lower outer cylinder 10, and a lower connector 11. The gamma body 8 is an integrated structure of the outer shell and the internal electronic compartment. The outer shell is equipped with a battery compartment, a data interface, and a pressure sensor interface. The battery compartment is used to install a backup power supply battery module, which provides emergency power to the internal control and storage circuits of the gamma measurement unit in case of abnormal power supply or power failure of the main single bus, ensuring that critical data is not lost. The data interface is a dedicated interface for ground debugging and data download, used to connect to ground debugging equipment in non-downhole state to realize parameter configuration, working status detection, and reading and exporting of downhole measurement data. The pressure sensor interface is used to synchronously collect downhole pressure parameters and gamma parameters. The internal electronic compartment integrates a power module, a main control storage module, a pressure / gamma signal processing module, two high-voltage power modules, and two gamma detection modules. The upper end of the gamma body 8 is a female connector 13, and the lower outer cylinder 10 is sleeved on the lower part of the gamma body 8. The lower end of the gamma body 8 and the upper end of the lower connector 11 are connected by a male-female connector structure. A conductive ring assembly is set between the gamma body 8 and the lower connector 11 to connect the single bus wires in their respective internal bus channels. The lower end of the lower connector 11 is a male connector 12, which connects to the female connectors of other docking devices.

[0027] The power supply system of the integrated drilling measurement and control device in this invention adopts a layered design. The power supply module integrated inside the gamma measurement unit 7 is relatively independent from the high-voltage power supply module, and only the high-voltage power supply module is completely electrically isolated from the single bus. The power supply module is a DC regulated power supply used to regulate, filter, and condition the input voltage of the single bus, providing a stable low-voltage operating power supply for the internal control circuit, signal acquisition circuit, and communication circuit of the gamma measurement unit 7. At the same time, it provides a reliable power input for the high-voltage power supply module, ensuring that the weak signal detection circuit is not affected by bus voltage fluctuations and electromagnetic noise interference. The high-voltage power supply module is a dedicated high-voltage power supply unit for the gamma detection module. The general power supply for the entire instrument string is provided by other power supply sections via the single bus, supplying power to the general circuits within the drilling measurement unit 4, resistivity measurement unit 1, and gamma measurement unit 7.

[0028] like Figure 3As shown, the gamma body 8 is fitted with an upper copper ring 23 and a lower copper ring 24. The upper copper ring 23 is located between the gamma body 8 and the lower outer cylinder 10 and abuts against both. The lower copper ring 24 is located between the lower outer cylinder 10 and the lower connector 11 and abuts against both. The upper copper ring 23 enables conductive connection between the gamma body 8 and the lower outer cylinder 10, and the lower copper ring 24 enables conductive connection between the lower outer cylinder 10 and the lower connector 11. Through the sequential conduction of the upper copper ring 23 and the lower copper ring 24, a continuous and interconnected equipotential conductive path is formed between the gamma body 8, the lower outer cylinder 10, and the lower connector 11. The shells maintain the same potential, which is used to eliminate potential differences and electromagnetic interference between the shells, while discharging static electricity and induced current downhole, improving the structural stability of the connection parts and the anti-interference safety of the instrument. The gamma measurement unit is a high-sensitivity detection module, and the requirements for the equipotential connection, shielding continuity, and grounding reliability of the instrument shell are much higher than those of conventional instruments. In the environment of downhole vibration and mud corrosion, the end face contact is prone to fretting wear and oxidation, which leads to increased contact resistance and poor grounding. The upper copper ring 23 and the lower copper ring 24 are set to prevent wear caused by direct contact between metal end faces and to ensure reliable electrical connection between the shells.

[0029] like Figure 4As shown, the conductive ring assembly includes a first elastic conductive semi-ring 18, a second elastic conductive semi-ring 19, a conductive ring copper ring 20, and a second PEEK ring 21. The first elastic conductive semi-ring 18 and the second elastic conductive semi-ring 19 are two symmetrical semi-circular rings made of elastic alloy material, respectively set in annular grooves on the gamma body 8, forming a ring structure for easy coaxial assembly and providing elastic clamping force to ensure electrical connection stability. The inner side of the conductive ring copper ring 20 is in contact with the outer walls of the first elastic conductive semi-ring 18 and the second elastic conductive semi-ring 19, and the second PEEK ring 21 is located outside the conductive ring copper ring 20. The second PEEK ring 21 is made of insulating material, with a dedicated wire groove on its body. An opening is provided at the connection point between the wire groove and the internal bus channel of the lower connector 11. Single-bus wires from the internal bus channel of the lower connector 11 are directly connected to the outer wall of the conductive ring copper ring 20 through the wire groove. The second PEEK ring 21 only serves as insulation and structural support. The bus connector at the end of the internal bus channel 15 of the gamma body 8 is connected to the wires that connect to the first elastic conductive half-ring 18 and the second elastic conductive half-ring 19, realizing the connection between the internal single bus of the gamma body 8 and the internal single bus of the lower connector 11. That is, the single bus from the lower connector 11 passes through the bus channel 15 in the lower connector 11 to the wire groove of the second PEEK ring 21 and is electrically connected to the conductive copper ring 20. The conductive copper ring 20 connects to the first elastic conductive half-ring 18 and the second elastic conductive half-ring 19. The wires that connect to the first elastic conductive half-ring 18 and the second elastic conductive half-ring 19 are connected to the bus connector at the port of the internal bus channel 15 of the gamma body 8. Then, the single bus inside the gamma body 8 is connected to the power module and other functional modules in the gamma electronic compartment. This set of conductive ring components is the core connection structure between the gamma body side and the internal single bus of the lower connector, realizing reliable conduction between the single bus on the gamma body 8 side and the single bus of the lower connector 11, and ensuring continuous and stable transmission of the single bus under strong vibration conditions in the well. The guide ring 22 is fitted below the gamma body 8, located between the outer surface of the gamma body and the inner wall of the lower connector, and is used for axial guidance when docking with the lower connector. The rings are coaxially nested and assembled to form a stable and reliable mechanical guide structure.

[0030] As the core control module of the integrated measurement and control while drilling device, the gamma measurement unit 7 collects formation gamma ray parameters through two gamma detection modules and downhole pressure parameters through the pressure sensor interface. After being processed by the pressure / gamma signal processing module, it is synchronously integrated and stored with the engineering parameters transmitted by the measurement and control while drilling unit 4. At the same time, it distributes power to the resistivity measurement unit 1 through a single bus and receives the logging parameters from the resistivity measurement unit 1.

[0031] The resistivity measurement unit 1 includes a resistivity body 2, six separate coil assemblies 3, and a cover plate assembly. The surface of the resistivity body 2 is provided with six annular grooves. The coil assemblies 3 are installed in the annular grooves with a left and right half-ring structure and are four-transmitter dual-receiver structures, supporting two transmission frequencies and two transmit-receive distances. The lower end of the resistivity body 2 is a male connector 12, and the upper end is a female connector 13. The lower side wall of the resistivity body 2 is provided with screw plugs to seal the process holes and wiring holes of the body to achieve pressure sealing. The cover plate assembly includes different types of cover plates arranged alternately along the axial direction of the resistivity body 2. The cover plates are all equipped with integrated circuit modules. There are through holes between adjacent cover plates to form a bus channel for single-bus wiring. Each integrated circuit module is connected to the bus connectors in the annular wiring grooves of the female connector 13 and male connector 12 located at both ends of the measurement-while-drilling body 5 through the bus channel.

[0032] The resistivity measurement unit 1 achieves dual-frequency, multi-transmit / receiver distance measurement of formation resistivity through a four-transmitter, dual-receiver split coil assembly 3, simultaneously acquiring phase difference and attenuation measurement values. After processing by the internal circuit module, it outputs a compensated and corrected resistivity curve. The resistivity parameters are transmitted to the main control storage module of the gamma measurement unit 7 via a single bus. After being integrated with engineering parameters and gamma parameters, the parameters are transmitted to the ground control system via the measurement while drilling unit 4. The through hole of its cover plate assembly provides a wiring channel for the single bus, and the screw plug and end face plug achieve sealing of the end of the body. The split coil assembly 3 facilitates maintenance and replacement.

[0033] A single bus runs through the circuit skeleton channel of the measurement while drilling unit 4, the internal channel of the electronic compartment of the gamma measurement unit 7, the lower connector 11, and the through hole of the cover plate of the resistivity measurement unit 1, so as to realize the unified power distribution and synchronous signal transmission of each module.

[0034] The integrated measurement and control device for drilling of this invention features a modular and reconfigurable design. During drilling operations, if any measurement module unit malfunctions, it can be individually disassembled and replaced without disassembling the entire instrument string. Furthermore, the connection sequence of each measurement module unit can be adjusted according to the actual operational needs of directional drilling. Each measurement module unit is adapted to a standardized male-female thread and a single-bus connector, enabling functional reconfiguration of the instrument string and adapting to diverse logging requirements.

[0035] The sealing system of the integrated drilling measurement and control device of the present invention can effectively resist the high pressure environment downhole and prevent well fluid from entering the module. The vibration-resistant design of each measurement module unit (such as the circuit skeleton of the drilling measurement unit 4, the module integration of the gamma measurement unit 7, and the split coil assembly 3 of the resistivity measurement unit 1) ensures that the internal electronic components and mechanical structure of the integrated drilling measurement and control device do not loosen or get damaged during the drilling process with strong vibration. The insulation and conductivity components such as the first PEEK ring 16 and the copper ring can still maintain their insulation and conductivity performance in the high temperature environment, ensuring that the instrument string works normally in the high temperature conditions of deep wells.

[0036] The present invention has been described in detail above through embodiments, but the content is only an exemplary embodiment of the present invention and should not be considered as limiting the scope of the present invention. The scope of protection of the present invention is defined by the claims. Any technical solutions designed by those skilled in the art using the technical solutions of the present invention, or designed by those skilled in the art under the inspiration of the technical solutions of the present invention, within the substance and protection scope of the present invention, to achieve the above-mentioned technical effects, or equivalent changes and improvements made to the scope of the application, should still fall within the patent protection scope of the present invention. It should be noted that, for clarity, descriptions of some components and processes that are not directly and obviously related to the protection scope of the present invention but are known to those skilled in the art have been omitted in the description of the present invention.

Claims

1. An integrated drilling measurement and control device combining measurement while drilling, gamma logging, and resistivity logging, characterized in that, It includes a detachably connected resistivity measurement unit, a measurement while drilling (MSW) unit, and a gamma measurement unit. The MSW, gamma, and resistivity measurement units are cylindrical structures of the same radius, mechanically connected by a male-female threaded joint. The male and female threaded joints are located at both ends of the MSW, gamma, and resistivity measurement units, respectively, and the mating surfaces of the male and female threaded joints are provided with corresponding annular wiring grooves. The MSW, gamma, and resistivity measurement units have a through bus channel inside, with a conductive metal ring embedded in the annular wiring groove. One end of the bus connector is located in the annular wiring groove. After the male and female threaded joints are connected, the conductive metal ring contacts the end of the bus connector in the annular wiring groove of the male and female threaded joints. The bus connector is electrically connected to the single-bus circuit inside each measurement module unit through a single-bus wire in the bus channel.

2. The apparatus according to claim 1, characterized in that, The measurement-while-drilling (MWD) unit comprises a MWD body and, sequentially, a resistivity probe clamping sleeve, an upper fixed sub, a quick-connect coupling, a quick-connect pressure ring, an upper electronic compartment connector, an outer electronic compartment cylinder, a circuit frame, and a lower electronic compartment connector. The MWD body has a female threaded connector at the top and a male threaded connector at the bottom. The resistivity probe clamping sleeve is nested inside the upper part of the MWD body. The upper fixed sub is coaxially fitted into the body and nests with the quick-connect coupling. The quick-connect pressure ring is installed inside the quick-connect coupling. The upper part of the upper electronic compartment connector is fitted with a quick-connect coupling. The quick-connect connector is fixed to the upper fixed short section by a pin. The lower end of the upper connector of the electronic compartment is connected to the circuit frame. The outer cylinder of the electronic compartment is fitted around the lower end of the upper connector of the electronic compartment, the circuit frame, and the upper end of the lower connector of the electronic compartment. The outer peripheral walls of the upper and lower connectors of the electronic compartment are provided with annular sealing grooves, and sealing rings are installed in the grooves. The outer cylinder of the electronic compartment is equipped with a circuit frame and integrates a single-bus core electronic component. The circuit frame is connected to the bus connectors on the female and male connectors located at both ends of the measurement-while-drilling body through a single-bus wire that passes through the bus channel.

3. The apparatus according to claim 1, characterized in that, The gamma measurement unit includes a gamma body, a lower outer cylinder, and a lower connector. The gamma body is an integrated structure of an outer shell and an internal electronic compartment. The outer shell has a battery compartment opening, a data interface, and a pressure sensor interface. The internal electronic compartment integrates a power module, a main control storage module, a pressure / gamma signal processing module, two high-voltage power modules, and two gamma detection modules. The upper end of the gamma body has a female connector, and the lower outer cylinder is fitted under the lower part of the gamma body. The lower end of the gamma body and the upper end of the lower connector are connected by a male-female connector structure. The lower end of the lower connector has a male connector. The gamma body and the lower connector each have a bus channel that is electrically connected through a conductive ring assembly. The bus channel in the gamma body is connected to the circuits of each module in the internal electronic compartment, and the bus channel in the lower connector is connected to the bus connector on the male connector.

4. The apparatus according to claim 1, characterized in that, The resistivity measurement unit includes a resistivity body, six separate coil assemblies, and a cover plate assembly. The resistivity body has six annular grooves on its surface. The coil assemblies have a four-transmitter, two-receiver structure, with left and right half-ring structures installed in the annular grooves, supporting two transmission frequencies and two transmit / receive distances. The lower end of the resistivity body has a male connector, and the upper end has a female connector. The lower side wall of the resistivity body has screw plugs. The cover plate assembly includes different types of cover plates arranged alternately along the axial direction of the resistivity body. Each cover plate contains an integrated circuit module. Through holes are provided between adjacent cover plates to form a bus channel with a single bus. Each integrated circuit module is connected to the bus connectors on the female and male connectors at both ends of the measurement-while-drilling body through a single bus wire that runs through the bus channel.

5. The apparatus according to claim 1, characterized in that, There are two conductive metal rings. Each conductive metal ring is covered with a rubber sealing ring on the three sides except for the annular mating end face. The rubber sealing ring and the conductive metal ring are interference-fitted and embedded into the annular wiring groove. The rubber sealing ring at the contact position between the conductive metal ring and the bus connector end face has an opening.

6. The apparatus according to claim 5, characterized in that, The lower male thread of the resistivity measurement unit, the measurement while drilling unit, and the gamma measurement unit is provided with a first PEEK ring at the root of the external thread.

7. The apparatus according to claim 6, characterized in that, The male threaded connectors at the lower ends of the resistivity measurement unit, the measurement while drilling unit, and the gamma measurement unit are equipped with end face plugs.

8. The apparatus according to claim 3, characterized in that, The gamma body is fitted with an upper copper ring and a lower cylindrical ring. The upper copper ring is located above the lower outer cylinder and abuts against the lower outer cylinder. The lower copper ring is located between the lower outer cylinder and the lower connector and abuts against both.

9. The apparatus according to claim 3, characterized in that, The conductive ring assembly includes a first elastic conductive half-ring, a second elastic conductive half-ring, a conductive ring copper ring, and a second PEEK ring. The first and second elastic conductive half-rings are two symmetrical semi-circular rings, each positioned in an annular groove on the gamma body, forming a ring structure. The inner side of the conductive ring copper ring abuts against the outer walls of the first and second elastic conductive half-rings. The second PEEK ring is located outside the conductive ring copper ring and is made of insulating material. A dedicated wire groove is formed in the ring body. An opening is provided at the junction of the wire groove and the internal bus channel of the lower connector. A single-bus wire from the internal bus channel of the lower connector is directly connected to the outer wall of the conductive ring copper ring through the wire groove. The bus connector at the end of the bus channel on the gamma body side is connected to the wire connecting the first and second elastic conductive half-rings.

10. The apparatus according to claim 3, characterized in that, A guide ring is fitted under the gamma body, located between the outer surface of the gamma body and the inner wall of the lower connector, for axial guidance when docking with the lower connector.

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