Instrument nacelle suitable for long-term measurement of multiple parameters of deep well

Abstract

The invention discloses an instrument nacelle suitable for deep well multi-parameter long-term measurement, which comprises an upper joint assembly body, a nacelle wall, an internal instrument short section, a lower joint and a temperature prediction circuit, and is characterized in that the upper joint assembly body comprises an upper joint, a left screw ring and a right screw ring; the internal instrument short section comprises a short section upper joint, an end gland, a short section wall, a mounting framework and a short section lower joint; the temperature prediction circuit comprises a sensor layer, an acquisition and data fusion layer, an LSTM time sequence prediction layer and an early warning layer. The upper connector assembly is connected with the upper oil pipe and the nacelle wall. The lower joint is respectively connected with the lower oil pipe and the nacelle wall; the instrument nipple is fixedly connected with the end face of the lower connector through threads. And the multi-parameter sensors can be respectively arranged on the front and back surfaces of the mounting framework in each instrument short section. According to the instrument nacelle suitable for long-term measurement of multiple parameters of the deep well, the requirements of the deep well scientific drilling field for multi-parameter comprehensive logging, safety and reliability and space optimization utilization can be met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of scientific logging, and particularly relates to a short cabin structure design suitable for deep well multi-parameter long-term measurement. BACKGROUND

[0002] The Tanlu fault zone is the largest, longest and most active deep fault in eastern China. Its deep structure and dynamic process are of great significance for earthquake risk assessment and geological disaster prevention and control. Songke No. 2 well is located in the affected area of the fault zone, with a drilling depth of more than 7000 meters, a bottom temperature of more than 200℃, and a high formation pressure of several hundred megapascals. The wellbore stability is poor and the instability risk is high. In order to ensure the safety of the wellbore, a 220.5mm diameter casing is usually used in construction. This scheme can provide the necessary space for logging instruments under high temperature and high pressure conditions and stabilize the wellbore, but it also brings two outstanding problems: first, the limited internal space of the sleeve restricts the logging instruments during lowering and operation; second, the extreme temperature and pressure conditions pose strict requirements on the heat resistance, pressure resistance and sealing capacity of the instruments, and existing logging equipment generally cannot work stably for a long time. The existing technology still lacks a multi-parameter logging short cabin structure that can balance space utilization, structural strength and adaptability to extreme environments, so there is an urgent need to propose an improved scheme to meet the needs of deep well scientific logging.

[0003] A new high temperature and high pressure lithology density logging instrument is disclosed in Chinese patent with publication number CN221373557U, which includes a detector section and a pusher short section. The upper end and the lower end of the detector section are respectively connected with a pusher short section through threads. A core assembly is installed in the shell assembly of the detector section. An upper protective cap is connected to the upper end of the shell assembly through an upper joint assembly. An arc-shaped spring plate is installed on the outer side of the pusher shell of the pusher short section through a sliding groove. In this patent, the structure design does not consider the comprehensive arrangement of multi-parameter sensors, and the internal layout is not optimized for miniaturization and compactness, which cannot meet the long-term use target in a narrow deep well environment.

[0004] A storage type high temperature and high pressure logging instrument is disclosed in Chinese patent with publication number CN211549670U. The instrument mainly includes a cable head, a sensor, a circuit board, a thermos bottle, a probe, a releaser and a metal shell. The storage type high temperature and high pressure logging instrument has a reasonable structure design. Through the combination structure of the metal shell and the thermos bottle, safe logging operation can be realized under high temperature and high pressure of 200℃ and 140Mpa, and high sulfur logging environment. At the same time, the logging site is small, the cost is low, and the operation is simple. In this patent, the thermos bottle structure occupies a large volume, resulting in a low space utilization rate under the condition of limited wellbore diameter, which is not conducive to the integrated arrangement of multiple sensors. Moreover, the multi-layer sealing and corrosion-resistant structure design are not proposed, which cannot meet the long-term goal of logging tasks.

[0005] The utility model discloses a logging instrument in the publication number CN205400715U of Chinese utility model discloses a logging instrument, including power module and electronic circuit control module, power module and electronic circuit control module are integrated into one. The logging instrument provided by the utility model, the functions of power module and electronic circuit control module are integrated, and are integrated into one. Not only increase the reliability, stability and maintainability of the instrument, but also greatly shorten the length of the instrument, reduce the risk of operation. At the same time, the high-temperature performance of some devices is also improved, and the temperature resistance is greatly improved from the original 150 degrees to 200 degrees, greatly expanding the use range of the instrument. The patent mainly focuses on the integration of the electronic system, and the function is still relatively single, lacks the support of multi-parameter logging, and the structure design does not consider the long-term adaptability of hundreds of megapascal pressure and high corrosion environment in deep well, the space utilization rate and the multi-functional expansion ability are insufficient, which is not conducive to scientific drilling and comprehensive application in complex environment.

[0006] In summary, although the prior art has improved in temperature resistance, reliability or single logging function, it still has problems such as single function, low space utilization, lack of multi-parameter integration capability, and insufficient long-term reliability in extreme high temperature, high pressure and high corrosion environment, which cannot meet the needs of deep well scientific drilling for multi-parameter comprehensive logging, safety and reliability and space optimization. SUMMARY

[0007] The purpose of the present application is to overcome the defects of single function, low space utilization, lack of multi-parameter integration capability and insufficient long-term reliability in extreme high temperature, high pressure and high corrosion environment of the existing logging instrument, and to provide a high temperature and high pressure multi-parameter logging short cabin structure suitable for deep well scientific long-term monitoring.

[0008] The purpose of the present application is achieved by the following technical solutions:

[0009] A short cabin of an instrument suitable for deep well multi-parameter long-term measurement, comprising an upper joint assembly, a short cabin wall, an internal instrument short section, a lower joint and a temperature prediction circuit.

[0010] The upper joint assembly comprises an upper joint, a left screw ring and a right screw ring.

[0011] The upper joint is the main part of the upper joint assembly, and a threaded hole is arranged at the center of the upper end surface. Further, the side surface of the upper end portion is uniformly distributed with 6 hook grooves and three wire cable grooves. Further, a screw ring mounting area and two sealing notches are arranged in the middle region of the joint.

[0012] The left screw ring and the right screw ring are uniformly provided with 6 hook grooves on the side surface of the upper end portion, and the two can be combined into a circular ring structure through screws, and a trapezoidal thread is arranged on the side surface of the structure.

[0013] The short nacelle wall is a cylindrical outer wall, and corresponding trapezoidal threads are arranged inside both ends.

[0014] The internal instrument short section comprises a short section upper joint, an end cover, a short section wall, a mounting skeleton and a short section lower joint. The short section upper joint is uniformly provided with a notch for mounting a sealing pin, and a triangular thread is arranged below for connection. The end cover is inserted into the corresponding notch of the short section upper joint, and a notch with a diameter of 5 mm is arranged on the same position of the cover surface. The short section wall is a cylindrical structure, and a triangular thread is arranged on both sides for connection. The lower outer side of the mounting skeleton is provided with a triangular thread, and the upper side is a cuboid skeleton. The instrument system can be distributed on both sides of the skeleton, and wiring is performed through the connecting holes on both sides of the skeleton. The lower outer side of the short section lower joint is provided with a thread for connecting with the short nacelle lower joint, the upper outer side of the short section lower joint is provided with a thread for connecting with the short section wall, the center of the upper end surface is drilled, and a threaded hole is arranged for connecting with the mounting skeleton. Further, two sealing grooves are arranged between the thread surfaces on both sides of the short section lower joint to prevent liquid from entering the internal short section.

[0015] The center of the lower end surface of the lower joint is provided with a threaded hole, and the upper side surface is provided with a trapezoidal thread. Further, two sealing notches are arranged below the trapezoidal thread for mounting corresponding sealing rings. Further, five instrument short section threaded holes are arranged on the upper end surface of the lower joint for connecting with the internal instrument short section. A drainage port is arranged below the sealing notch for introducing the downhole fluid in the casing into the fluid cabin of the lower joint, so as to measure the hydraulic pressure of the external fluid by the pressure short section. Further, four short nacelle lower joint hooking grooves are uniformly arranged on the lower side surface of the lower joint to facilitate subsequent screwing.

[0016] The material of the upper joint assembly, the short nacelle wall and the lower joint is TC11, and the material of the internal instrument short section is 6061 aluminum alloy.

[0017] The temperature prediction circuit comprises a sensor layer, a collection and data fusion layer, an LSTM time sequence prediction layer and a warning layer. The sensor layer inputs the collected analog signals into an ADC collection module to convert them into digital signals, which are then connected with a data processing module to remove noise and abnormal data. Further, the matrix fusion module fuses the processed data with the hidden layer matrix output by the LSTM time sequence prediction layer. The fused data is input into the LSTM input module, and after model prediction, the future 15-minute temperature data of each sensor is transmitted to the threshold judgment module of the warning layer by the LSTM output module. If the temperature value is higher than the threshold, the power module is turned off.

[0018] The beneficial effects of the present application are:

[0019] The short cabin suitable for deep well multi-parameter long-term measurement of the application significantly improves the bearing capacity of the cabin body in high temperature, high pressure and high corrosion environment, ensures the long-term stable operation of the logging device under the condition of more than 120 DEG C and 50 MPa pressure, and effectively prevents the invasion of complex downhole fluid by adopting a multi-layer sealing combination structure, thereby ensuring the safety and reliability of the internal electronics and sensors of the instrument. The overall structure of the short cabin is compact, the space utilization rate is high, the integrated arrangement of multiple types of sensors can be realized under the condition of 220.5mm casing restriction, and the demand of multi-parameter comprehensive logging is met. Through the modular interface design, flexible wiring and connection between sensor units are realized, and the adaptability and maintainability of the system are improved. Based on the above design, the application can meet the requirements of deep well scientific drilling on the tolerance, precision and reliability of logging equipment in extreme environment, provide important technical support for the safe and smooth implementation of deep exploration operation, and has significant engineering application value and popularization prospect. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the short cabin of the multi-parameter long-term measurement instrument of the application in a deep well;

[0021] Figure 2 is a structural schematic diagram of the upper joint sub-assembly of the application;

[0022] Figure 3 is a structural schematic diagram of the internal instrument short section of the application;

[0023] Figure 4 is a top view schematic diagram of the upper joint of the internal instrument short section of the application;

[0024] Figure 5 is a sectional view schematic diagram of the lower joint of the internal instrument short section of the application;

[0025] Figure 6 is a structural schematic diagram of the lower joint of the application;

[0026] Figure 7 is a top view schematic diagram of the lower joint of the application;

[0027] Figure 8 is a structural schematic diagram of the temperature prediction circuit of the application.

[0028] In the figure, 1. upper joint assembly, 2. nacelle wall, 3. internal instrument short section, 4. lower joint, 5. temperature prediction circuit, 11. upper joint, 12. left spiral ring, 13. right spiral ring, 111. upper end face center threaded hole, 112. upper joint hook slot, 113. wire cable groove, 114. upper joint threaded setting area, 115. upper joint sealing notch, 121. spiral ring hook slot, 122. spiral ring trapezoidal thread, 21. nacelle wall trapezoidal thread, 31. short section upper joint, 32. end gland, 33. short section wall, 34. mounting skeleton, 35. short section lower joint, 311. sealing pin notch, 312. short section upper joint thread, 331. short section wall thread, 341. mounting skeleton thread, 342. skeleton, 343. wiring connection hole, 351. short section lower joint thread, 352. short section lower joint and nacelle wall connection thread, 353. short section lower joint and mounting skeleton connection thread, 354. short section lower joint sealing groove, 41. short nacelle lower joint and oil pipe connection thread, 42. short nacelle lower joint and short nacelle wall connection thread, 43. sealing notch, 44. short nacelle lower joint and instrument short section connection thread hole, 45. drainage port, 46. fluid tank, 47. short nacelle lower joint hook slot, 51. sensor layer, 52. acquisition and data fusion layer, 53. LSTM time series prediction layer, 54. early warning layer, 521. ADC acquisition module, 522. data processing module, 523. matrix fusion module, 531. hidden layer matrix, 532. LSTM input module, 533. LSTM output module, 541. threshold judgment module, 542. power module. DETAILED DESCRIPTION

[0029] The application will be described in detail below with reference to the drawings and specific embodiments. The following examples are only used to more clearly illustrate the technical solutions of the application, and cannot be used to limit the protection solutions of the application.

[0030] Example 1

[0031] The application discloses an instrument short nacelle suitable for deep well multi-parameter long-term measurement, which comprises an upper joint assembly 1, a short nacelle wall 2, an internal instrument short section 3 and a lower joint 4. Figure 1 As shown in the figure, the upper end face center of the short nacelle upper joint assembly 1 is connected to the oil pipe above the short nacelle through a threaded hole 111. Further, the hole thread needs to meet the API SPEC 5B standard. As shown in the figure, Figure 2As shown, the left screw ring 12 and the right screw ring 13 are combined into a complete screw ring by screws, and trapezoidal threads are arranged on the lower outer wall of the screw ring, with parameters of Tr176x3x45, and the trapezoidal threads are connected and fixed with the nacelle wall 2. The upper and lower sides of the nacelle wall 2 are symmetrically provided with two trapezoidal threads, which have the same parameters as the trapezoidal threads of the screw ring. The nacelle wall 2 is screwed and connected with the nacelle lower joint 4 through the trapezoidal threads. The lower end of the nacelle lower joint 4 is provided with a connecting thread 41, which also needs to meet the API SPEC 5B standard. The nacelle lower joint 4 is connected with the lower oil pipe through the connecting thread 41.

[0032] Further, the upper joint assembly 1 is uniformly provided with four hook grooves 112 on the upper side of the ring surface, and a threaded make-up tool can connect the upper joint assembly 1 with the upper oil pipe through the structure. Further, the upper joint assembly 1 is provided with three wire and cable grooves 113 on the outer side of the ring surface, and power transmission cables, optical fibers and electrode cables can be fixed downward through the grooves. The size of the three wire and cable grooves is 6.5 mm in width and 7 mm in depth.

[0033] Further, as shown in Figure 6 and Figure 7 , the side of the lower joint 4 is provided with a drainage port 45, through which external fluid can enter the fluid chamber 46 inside the joint to facilitate the conduction of external fluid pressure and temperature to the chamber. The lower end of the lower joint 4 is also uniformly provided with a hook groove 47, through which a threaded make-up tool can connect the lower joint with the lower oil pipe. The upper end of the lower joint is provided with five threaded holes 44, with a thread parameter of M54x2x30. The inner instrument pup joint 3 can be fixedly connected with the lower joint 4 through the threaded holes.

[0034] Further, as shown in Figure 3 , the inner instrument pup joint 3 is composed of a pup joint upper joint 31, an end gland 32, a pup joint wall 33, a mounting skeleton 34 and a pup joint lower joint 35. As shown in Figure 4 , the upper end of the pup joint upper joint is provided with 29 sealing pin grooves 311, which are matched with single-core sealing pins of model SPG-32J of the China Aviation Optoelectronics Corporation, and a 5 mm diameter hole is arranged on the end gland 32 corresponding to the pin hole for pin positioning. The lower end of the pup joint upper joint 31 is provided with a thread 312 for connection with the pup joint wall 33. As shown in Figure 5 , the lower end of the mounting skeleton 34 is provided with a thread 341 for connection with the threaded hole 353 of the pup joint lower joint. Further, two wire connection holes 343 are arranged on the upper and lower sides of the mounting skeleton, through which the sensors on both sides of the skeleton can be wire-connected. All the threads involved in the above-mentioned inner instrument pup joint 3 are M54x2x30 triangular threads, which need to meet the requirements of GB / T197-2003.

[0035] Further, the sealing slots 115, 354, 43 involved in the above assembly structure all need to refer to the slot size to select the FKM material sealing ring produced by the American Parker Hannifin enterprise.

[0036] Embodiment 2

[0037] A kind of short nacelle suitable for deep well multi-parameter long-term measurement instrument, temperature detection circuit, as shown in Figure 8 .

[0038] Sensor layer 51 gathers the signal of each temperature measuring point in short nacelle and sends into collection and data fusion layer 52, after obtaining digital quantity by ADC collection module 521, filter, calibration and normalization are completed in data processing module 522, then by matrix fusion module 523, the hidden layer matrix 531 of past time step is combined to carry out data fusion.Further, the above-mentioned fusion data is input into LSTM time series prediction layer 53, wherein LSTM input module 532 and LSTM output module 533 work cooperatively, output obtains the temperature prediction value of each sensor in future time period, and the hidden layer matrix 531 generated simultaneously is fed back in the layer for the prediction update of next time; Prediction result is transmitted to threshold judgment module 541 of early warning layer 54, compared with preset temperature threshold, when determining higher than threshold, control instruction is sent to power module 542 to stop power supply, realize early warning and linkage protection to short nacelle over temperature.

Claims

1. An instrument nose suitable for deep well multi-parameter long-term measurement, characterized in that, The upper joint assembly (1), the nacelle wall (2), the internal instrument short section (3), the lower joint (4) and the temperature prediction circuit (5) are included. The upper joint assembly (1) includes the upper joint (11), the left screw ring (12) and the right screw ring (13). The upper joint (11) is the main part of the upper joint assembly (1), and a threaded hole (111) is arranged at the center of the upper end surface thereof; the left screw ring (12) and the right screw ring (13) are uniformly provided with six hook grooves (121) on the upper end surface thereof, and the two are combined into a circular ring structure through screws, and trapezoidal threads (122) are arranged on the side surface of the structure. The nacelle wall (2) is a cylindrical outer wall, and corresponding trapezoidal threads (21) are arranged on the inner side of both ends. The internal instrument short section (3) includes the short section upper joint (31), the end gland (32), the short section wall (33), the mounting skeleton (34) and the short section lower joint (35); the short section upper joint (31) is uniformly provided with a slot (311) for mounting a sealing pin, and a triangular thread (312) for connection is arranged below; the short section wall (33) is a cylindrical structure, and triangular threads (331) for connection are arranged on both sides thereof; the lower end of the mounting skeleton (34) is provided with a triangular thread (341), and a cuboid skeleton (342) is arranged above, and instrument systems are distributed on both sides of the skeleton, and wiring is performed through the connecting holes (343) on both sides of the skeleton. The lower end surface of the lower joint (4) is provided with a threaded hole (41), and a trapezoidal thread (42) is arranged on the upper side surface thereof; two sealing grooves (43) are arranged below the trapezoidal thread (42) to mount corresponding sealing rings; a drainage port (45) is arranged below the sealing grooves (43), and the downhole fluid in the casing is introduced into the fluid cabin (46) of the lower joint (4) through the drainage port (45), so as to facilitate the measurement of the external fluid pressure of the pressure short section.

2. The instrument pod suitable for long-term measurement of multiple parameters in a deep well according to claim 1, characterized in that, The upper end surface of the lower joint (4) is provided with five instrument short section threaded holes (44) for connecting the internal instrument short section (3); the lower end surface of the lower joint (4) is uniformly provided with four nacelle lower joint hook grooves (47).

3. The instrument pod suitable for long-term measurement of multiple parameters in a deep well according to claim 1, characterized in that, The upper end surface of the lower joint (4) is provided with five instrument short section threaded holes (44) for connecting the internal instrument short section (3); the lower end surface of the lower joint (4) is uniformly provided with four nacelle lower joint hook grooves (47).

4. The instrument pod suitable for long-term measurement of multiple parameters in a deep well according to claim 1, characterized in that, The temperature prediction circuit (5) comprises a sensor layer (51), a collection and data fusion layer (52), an LSTM time sequence prediction layer (53) and an early warning layer (54); the sensor layer (51) inputs the collected analog signals into an ADC collection module (521) to convert them into digital signals, and then connects with a data processing module (522) to remove noise and abnormal data; a matrix fusion module (523) fuses the processed data with a hidden layer matrix (531) output by the LSTM time sequence prediction layer (53); the fused data is input into an LSTM input module (532), and after model prediction, the future 15-minute sensor temperature data is transmitted to a threshold judgment module (541) of the early warning layer (54) by an LSTM output module (533); if the temperature value is higher than the threshold, the power module (542) is turned off.

5. The instrument pod suitable for long-term measurement of multiple parameters in a deep well according to claim 1, characterized in that, The lower end of the short section lower connector (35) is externally threaded (351) and connected with the short section lower connector (4), the upper end of the short section lower connector (35) is externally threaded (352) and connected with the short section wall (33), the center of the upper end face is drilled and threaded holes (353) are arranged to connect with the mounting framework (34).

6. The instrument pod suitable for long-term measurement of multiple parameters in a deep well according to claim 1, characterized in that, Two sealing grooves (354) are arranged between the two threaded surfaces of the short section lower connector (35) to prevent liquid from entering the short section.

7. The instrument pod suitable for long-term measurement of multiple parameters in a deep well according to claim 1, characterized in that, The end gland (32) is inserted and connected with the corresponding slot of the short section upper connector, and the gland surface is also provided with a slot with a diameter of 5mm.

8. The instrument pod suitable for long-term measurement of multiple parameters in a deep well according to claim 1, characterized in that, The material of the upper connector assembly (1), the short section wall (2) and the lower connector (4) is TC11, and the material of the internal instrument short section (3) is 6061 aluminum alloy.

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