A vibration measuring device for small-sized drill bits

Abstract

The present invention relates to the technical field of oil and gas exploration and development, and in particular to a small-sized internal vibration measuring device for a drill bit. It is composed of an external support frame, an insulation tube and a measuring module. The external support frame is composed of a support frame body and a support frame end cover. The support frame body has a flow channel in the shape of a finished product in the circumference, and the end cover is conical, which plays a diversion role inside the drill bit, reduces the circulating pressure loss of the device, and improves the impact damage of solid particles. Compared with the existing technology, the present invention realizes the vibration measurement inside the drill bit, can be directly installed inside the drill bit without changing the existing process technology of the oil and gas well industry, and has high reliability and strong scalability. Based on the design of MEMS components, it has a small size, low power consumption and strong portability.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and natural gas exploration and development, and in particular to a vibration measuring device inside a small-sized drill bit. Background Art

[0002] During the drilling process, the drill bit is affected by vibrations of different amplitudes and frequencies underground, influenced by the wellbore structure, tubing structure, formation properties, construction parameters, and speed-increasing tools such as torsional impact. This is directly reflected in the mechanical drilling rate, drill bit life, and drill tool deformation.

[0003] Therefore, measuring and studying the actual vibration conditions at the drill bit is of great significance for drilling rate prediction, drilling tool damage analysis, and formation understanding in the field of oil and gas well engineering.

[0004] Existing technologies generally use vibration measurement at the surface drilling rig or while-drilling vibration measurement near the drill bit. However, research has shown that due to the mechanical and structural characteristics of the drill string, data collected from the surface and measured while-drilling near the drill bit exhibit significant deviations from the actual drill bit vibration. Furthermore, the sampling rate of existing devices is only 0.5-2 Hz, far lower than the drill bit's vibration frequency of over 300 Hz.

[0005] Therefore, the existing technology cannot fully, objectively and accurately reflect the actual vibration of the drill bit. Summary of the Invention

[0006] The purpose of the present invention is to provide a small-sized drill bit internal vibration measuring device to address the deficiencies in the prior art.

[0007] The drill bit posture and vibration are measured using data from micro-electromechanical accelerometers and gyroscopes. This technology has the advantages of small size, low cost, high reliability, and strong scalability. It can be installed inside the drill bit coupling, including the drill bit, without changing the existing operating conditions and equipment structure, forming a vibration measurement technology along the drill bit, creating conditions for information-based intelligent drilling.

[0008] The technical solution is as follows:

[0009] A small-sized drill bit internal vibration measuring device consists of an external support frame 1, a heat insulation tube 2 and a measuring module 3.

[0010] The external support frame 1 is composed of a support frame body 4 and a support frame end cover 5 .

[0011] The support frame body 4 is formed in a U-shaped pattern with flow channels 8-10, a storage chamber 11, a positioning slot 12, and a mounting slot 13. The support frame end cap 5 has a conical top, which acts as a flow diverter within the drill string, reducing circulating pressure loss and improving impact damage to solid particles. The external support frame 1 is mounted to the inside of the drill string coupling using a threaded or welded compression ring.

[0012] The insulation tube 2 is composed of an insulation tube upper section 6 and an insulation tube lower section 7. The insulation tube upper section 6 is composed of an upper section main body 14 and an upper section thread 15. The upper section main body 14 is composed of a positioning key 18, an upper section outer shell 19, and an upper section inner shell 20, and an unequal diameter stepped columnar storage chamber 23-24 is formed inside. The inner diameter of the storage chamber 24 is the same as the outer diameter of the upper section thread 15. The upper section thread is installed in the storage chamber 24 and is connected to the upper section inner shell 20 by vacuum spot welding. The positioning key 18, the upper section outer shell 19, and the upper section inner shell 20 are connected by vacuum welding, and a vacuum is formed between the upper section outer shell 19 and the upper section inner shell 20. The insulation tube lower section 7 is composed of a lower section main body 16 and a lower section thread 17. The lower section main body 16 is composed of a lower section outer shell 21 and a lower section inner shell 22, and an equal diameter columnar storage chamber 25 is formed inside. The inner diameter of the accommodating chamber 25 is the same as the inner diameter of the lower thread 17, and the lower thread is connected to the lower inner shell 22 by vacuum spot welding. The lower outer shell 21 and the lower inner shell 22 are connected by vacuum welding, and a vacuum is formed inside them.

[0013] The measurement module 3 consists of a measurement circuit board assembly 26, an internal support frame 27, and a battery assembly 28. The measurement circuit board assembly 26 is designed based on MEMS components and consists of storage boards 33, 35, a measurement control board 34, data lines 31, 32, and external power lines 29, 30. The storage boards 33, 35 are connected to the measurement control board 34 via data lines 31 and 32, respectively, for power and data exchange. The data lines 31, 32 are soldered to the storage boards 33, 35, and the control board 34 via tin-based alloy. The external power lines 29, 30 are connected to the measurement control board 34 via tin-based alloy soldering and supply power to the entire measurement circuit assembly 26 during measurement operations. The end of the measurement control board 34 is designed with a gold finger 43 to facilitate connection to a host computer after measurement and data read and write operations. The internal support frame 27 is made of high-temperature nylon and is used to support and place the measuring circuit board assembly 26. It prevents the measuring circuit board assembly 26 from accidentally shaking due to vibration during the measurement process, and avoids the risk of short circuit caused by direct contact between the measuring circuit board assembly 26 and the metal inside the insulation tube. The internal support frame 27 is provided with through holes 36, 37 and through slots 38-40. The storage boards 33, 35, the measurement control board 34, and the external power lines 29, 30 in the measuring circuit board assembly 26 are placed in the through slots 38, 40, 39 and the through holes 36, 37 respectively. Quick connectors 41, 42 are installed at the bottom of the external support frame and at the end of the through slots 38-39 for connecting to the battery assembly 28. The quick connectors 41, 42 are connected to the external power lines 29, 30 respectively in the form of tin-based alloy welding. The battery assembly 28 uses a high-temperature resistant battery.

[0014] It should be noted that the quick connector connection is only one way to achieve the connection between the measurement circuit assembly 26 and the battery assembly 28. Technicians can achieve similar functions through pins, slip rings, etc. without departing from the concept of the present invention, and it should not be considered as an innovation beyond this patent.

[0015] The measurement module 3 is placed in the internal compartment of the insulation cylinder and is sealed and protected against shock and heat by the use of silicone potting compound. The insulation cylinder 2 is placed in the external support frame 1 compartment. The positioning grooves 12 and the positioning keys 18 cooperate to limit the radial movement of the insulation cylinder 2 and the measurement module 3 within it. The support frame body 4 and the support frame end cap 5 are threadedly connected to limit the axial movement of the measurement module 3 within the insulation cylinder 2.

[0016] When the device is in use, the upper section of the insulation cylinder with the measurement circuit assembly sealed in it is used alone to connect to the host computer, clear the memory data, configure the measurement parameters, perform sensor data correction, align the clock, and issue the measurement plan.

[0017] Furthermore, when the device is used, it is lowered into the well along with the drilling tool to start the measurement operation, and the data is stored in the storage board of the measurement module; after the measurement is completed, the device is lifted to the wellhead, the upper section of the insulation tube is removed and connected to the host computer to perform data reading operations.

[0018] When the device is in use, the battery can be quickly replaced and the next measurement operation can be carried out by replacing the lower section of the insulation tube (including the battery).

[0019] The beneficial effects of the present invention are:

[0020] This invention achieves in-bit vibration measurement and can be directly installed inside the drill bit without changing existing oil and gas well industry processes. It has high reliability and strong scalability. Based on MEMS component design, it is small in size, low in power consumption, and highly portable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the internal assembly of the vibration measurement device inside a small-sized drill bit;

[0022] Figure 2 It is a top view of the main body of the external support frame;

[0023] Figure 3 This is a bottom view of the external support frame body;

[0024] Figure 4 This is a cross-sectional view of the main body of the external support frame;

[0025] Figure 5 Cross-sectional view of the end cap of the external support frame;

[0026] Figure 6 This is a schematic diagram of the insulation tube installation;

[0027] Figure 7 This is a cross-sectional view of the insulation tube;

[0028] Figure 8 This is a schematic diagram of the measurement circuit assembly and the internal support frame assembly;

[0029] Figure 9 A perspective view showing the assembly of the heat preservation cylinder and the measuring module;

[0030] Figure 10 This is a schematic diagram and a partial enlarged view of the assembly of the measuring circuit assembly and the upper section of the insulation cylinder;

[0031] Figure 11 Schematic diagram of the external assembly of the vibration measurement device inside a small drill bit Figure 1 ;

[0032] Figure 12 Schematic diagram of the external assembly of the vibration measurement device inside a small drill bit Figure 2 ;

[0033] Figure 13 A flow chart is provided for the use of a small-size in-bit vibration measurement device. DETAILED DESCRIPTION

[0034] Example 1:

[0035] like Figure 6 、 Figure 7 As shown, the insulation cylinder is composed of an upper main body 14 of the insulation cylinder, an upper thread 15, a lower thread 17, and a lower main body 16. Both the upper main body 14 and the lower main body 16 adopt a double-layer metal structure, and vacuum welding is used to achieve the connection between the inner and outer shells 19 and 20 of the upper main body, and the inner and outer shells 21 and 22 of the lower main body, and the high-temperature protection of the measuring module 3 is achieved through the characteristics of low efficiency of vacuum heat conduction and heat convection. The upper thread 15 is installed in the accommodating chamber 24, and is connected to the upper main body 14 of the insulation cylinder by vacuum spot welding. The lower thread 17 is also connected to the lower main body 16 of the insulation cylinder by vacuum spot welding. The positioning key 18 is installed at the top center position of the upper section 14 of the insulation cylinder by vacuum spot welding.

[0036] Example 2:

[0037] like Figure 8 As shown, the measurement circuit assembly 26 has a "mountain"-shaped structure, and its storage boards 33, 35 and the measurement control board 34 are connected through flexible data lines 31, 32 to realize data and power interaction. The flexible data lines are welded to the storage board and the measurement control board through tin-based alloy. When the device is used for the first time, the measurement circuit assembly 26 storage boards 33, 35 and the measurement control board 34 are respectively placed in the through grooves 38, 40, and 39 of the internal support frame 27, and are initially fixed using heat-resistant glue. The external power lines 29, 30 are inserted into the through holes 36, 37, and the quick connectors 41, 42 are connected at the bottom of the internal support frame 27 by tin-based alloy welding, and are connected to the measurement control board at the top of the measurement circuit assembly 26 by tin-based alloy welding ( Figure 10 After the upper section of the insulation cylinder is welded to the upper section thread, slowly inject the silicone potting compound into the upper section storage chamber 23 of the insulation cylinder, and install the measurement circuit assembly 26 into the upper section storage chambers 23 and 24 of the insulation cylinder. Wait for the silicone potting compound to solidify, and complete the assembly of the measurement circuit assembly 26, the internal support frame 27, and the upper section of the insulation cylinder 6 in the measurement module 3.

[0038] Example 3:

[0039] like Figure 10As shown, the measurement control board in measurement circuit assembly 26 is designed with a gold finger at the end. After completing the assembly of measurement circuit assembly 26, internal support frame 27, and upper section 6 of the insulation cylinder, a special connector can be used at any stage to connect measurement circuit assembly 26 to a host computer, enabling operations such as data reading and writing, sensor calibration, measurement parameter configuration, and solution issuance. It should be noted that the gold finger is only one method for quickly connecting measurement circuit assembly 26 to a host computer. Technicians can also use pins, aviation connectors, pingo contacts, and other methods to achieve the connection between the measurement circuit assembly and the host computer without inventive labor.

[0040] Example 4:

[0041] like Figure 9 As shown, after completing the welding of the lower section main body 16 of the insulation tube and the lower section thread 17, inject the silicone potting glue into the accommodating chamber 25, and load the battery assembly 28 into the accommodating chamber 25 of the insulation tube, and wait for the silicone potting glue to solidify. Connect the battery assembly 28 to the internal support frame 27 and the measuring circuit assembly 26 through the quick connector. Tighten the threads to achieve the connection between the upper section 6 of the insulation tube and the lower section 7 of the insulation tube. It should be noted that the quick connector is only one of the ways to achieve the connection between the battery assembly 28 and the internal support frame 27 and the measuring circuit assembly 26. Technical personnel can use slip rings, pins, etc. to achieve the connection between the battery assembly 28 and the internal support frame 27 and the measuring circuit assembly 26 without paying any creative labor.

[0042] Example 5:

[0043] like Figure 1 As shown, after installing the insulation cylinder 2 and measurement module 3, the insulation cylinder 2 is placed in the external support frame main body accommodating compartment 11. The upper locating key 18 of the insulation cylinder cooperates with the external support frame locating groove 12 to radially limit the insulation cylinder 2. The external support frame main body 4 is connected to the external support frame end cap 5 via threads, and tightening the external support frame end cap to axially limit the insulation cylinder 2. The external support frame end cap is designed to be conical, which acts as a diversion within the drill string, reducing the circulating pressure loss of the device and improving the impact damage of solid particles.

[0044] Example 6:

[0045] like Figure 2 、 Figure 3 、 Figure 4 The present invention relates to a small-sized drill bit internal vibration measuring device, wherein the external support frame body 4 is connected to the upper and lower downstream (43, 44) couplings of the drill bit through external threads, thereby realizing the drill bit internal installation of the small-sized drill bit internal vibration measuring device of the present invention ( Figure 11). For drill bits of different specifications, the coupling can be adapted by simply adjusting the outer diameter of the external support frame body 4 and the matching thread, without modifying other structures and parameters.

[0046] Example 7:

[0047] Figure 2 , Figure 3 , Figure 4 The external support frame body 4 is only one form of implementation. For some situations where it is inconvenient to use threaded connection, the vibration measuring device in the small-sized drill bit of the present invention can be installed by welding a pressure ring on the external support frame body 4 ( Figure 12 The compression ring is supported by the drill bit coupling (pin) 43 and, after tightening the upstream drilling box 45, is pressed against the bottom of the box. For different drill bit specifications, the coupling can be adapted by simply adjusting the outer diameter of the external support body 4 and the size of the matching compression ring, without modifying other structural parameters.

[0048] Example 8:

[0049] In the field of oil and gas exploration and development, various downhole tools including drill bits are connected to each other in the form of couplings. The small-sized drill bit vibration measuring device of the present invention is installed in the drill bit through coupling adaptation, and can be installed in essence at any downhole drill bit coupling. Figure 11 、 Figure 12 , there is no need to make any creative efforts, just understand 43 as the downstream drill tool male buckle and 45 as the upstream drill tool female buckle.

[0050] Example 9:

[0051] like Figure 13 As shown, when the device is used for the first time, permanent internal processing should be performed according to Examples 1, 2, and 4. Then, according to Example 3, the device should be connected to the host computer, memory data should be cleared, measurement parameters should be configured, sensor data calibration should be performed, clock alignment should be performed, and a measurement plan should be issued. After the device is temporarily installed according to Examples 5, 6, 7, and 8, it should be lowered into the well along with the drill string to begin measurement operations. The data should be stored in the measurement module storage board. After the measurement is completed, the device should be lifted to the wellhead, the temporary installation should be removed, and the device should be connected to the host computer according to Example 3 to read the data. The lower section of the insulation cylinder (including the battery) should be replaced to complete the quick battery replacement and prepare for the next measurement operation.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A vibration measuring device for a small-sized drill bit, characterized in that: The device includes an external support frame, a heat preservation cylinder and a measuring module, wherein the measuring module is installed in the heat preservation cylinder, and the heat preservation cylinder is installed in the external support frame; The external support frame includes a support frame body and a support frame end cover; the support frame body is provided with a flow channel in the shape of a finished product, and a receiving chamber, a positioning groove, and a mounting groove are provided in the middle; the top of the support frame end cover is conical; The insulation cylinder is composed of an upper section and a lower section of the insulation cylinder; the upper section and the lower section of the insulation cylinder are connected by threads; the upper section of the insulation cylinder is composed of an upper section body and an upper section thread; the upper section body is composed of a positioning key, an upper section outer shell, and an upper section inner shell, and an unequal diameter stepped columnar storage chamber is formed inside the body; the positioning key, the upper section outer shell, and the upper section inner shell are connected by vacuum welding, and a vacuum is formed between the upper section outer shell and the upper section inner shell; The lower section of the insulation cylinder is composed of a lower section main body and a lower section thread; the lower section main body is composed of a lower section outer shell and a lower section inner shell, and an equal-diameter cylindrical storage chamber is formed inside it; the lower section outer shell and the lower section inner shell are connected by vacuum welding, and a vacuum is formed inside them; the lower section thread is connected to the lower section inner shell by vacuum spot welding.

2. The vibration measuring device for a small-sized drill bit according to claim 1, characterized in that: The upper section is threadedly installed in the upper section main body accommodating chamber and is connected to the upper section main body inner shell by vacuum spot welding.

3. The vibration measuring device for a small-sized drill bit according to claim 2, characterized in that: The measurement module is composed of a measurement circuit board assembly, an internal support frame, and a battery assembly; The measurement circuit board assembly is designed based on MEMS components and has a "mountain"-shaped structure, consisting of a storage board, a measurement control board, a data line, and an external power line; The storage board and the measurement control board are connected via a data line and exchange power and data; the data line is welded to the storage board and the control board via a tin-based alloy; the external power line is welded to the measurement control board via a tin-based alloy; the external power line transmits power to the entire measurement circuit assembly during the measurement operation.

4. The vibration measuring device for a small-sized drill bit according to claim 3, characterized in that: The internal support frame is made of high-temperature nylon and is used to support and place the measurement circuit board assembly. It prevents accidental shaking of the measurement circuit board assembly due to vibration during the measurement process, and avoids the risk of short circuit caused by direct contact between the measurement circuit board assembly and the metal inside the insulation cylinder. The internal support frame is provided with through holes and through slots, which are used for installing and fixing the external power lines of the measurement circuit board assembly, the storage board and the measurement control board respectively; A quick connector, slip ring, or pin is installed at the end of the through slot at the bottom of the internal support frame for connecting to the battery assembly; the quick connector, slip ring, or pin is connected to the external power line in the form of tin-based alloy welding; The measuring module is placed in the internal accommodation chamber of the heat preservation cylinder, and the sealing, shock resistance and temperature resistance of the measuring module are achieved by pouring organic silicone potting glue.

5. The vibration measuring device for a small-sized drill bit according to claim 4, characterized in that: The heat-insulating cylinder is placed in the accommodating compartment of the external support frame, and the positioning groove of the external support frame cooperates with the positioning key of the heat-insulating cylinder to limit the radial movement of the heat-insulating cylinder and its internal measuring module.

6. The vibration measuring device for a small-sized drill bit according to claim 5, characterized in that: The support frame body and the support frame end cover are connected by threads, and form an axial movement limit for the measuring module inside the heat preservation tube machine.

7. The vibration measuring device for a small-sized drill bit according to claim 6, characterized in that: The measuring module measuring circuit assembly and the internal support frame are sealed in the upper section of the insulation cylinder with organic silicone potting glue; the measuring module battery assembly is sealed in the lower section of the insulation cylinder with organic silicone potting glue.

Images