Multi-functional drill bit

Abstract

The utility model discloses a kind of multifunctional over-drill, belong to oil and gas exploration equipment technical field, including hollow main body shell, source storehouse main body is set in shell and is contained in electronic instrument skeleton, further include: joint clamping fixed between the joint card seat of electronic instrument skeleton and source storehouse main body, piston sealing joint of fixed connection in source storehouse main body one end and the O-ring sealed in the joint of two, multifunctional over-drill further include the balance cylinder of being sleeved in the outside of main body shell, and wet joint of being detachably connected to main body shell.The utility model is combined by above structure, effectively solve the technical problem that internal electronic component is damaged due to downhole strong vibration and high-pressure fluid intrusion, with the beneficial effects of stable and reliable structure, good sealing, strong environmental adaptability and convenient data export.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas exploration equipment technology, and in particular to a multi-functional drill bit. Background Technology

[0002] Logging while drilling is a key technology in modern oil and gas exploration and development. It can acquire formation parameters while drilling. In logging while drilling technology, there are storage logging instruments that are run into and retrieved through the drill pipe water hole, also known as over-the-bit logging instruments. These instruments carry a sophisticated electronic measurement system that collects geological data in real time during drilling and stores it internally, and then reads it all at once after the drill string is pulled out.

[0003] These instruments operate in extremely harsh environments and face two major challenges. First, the drilling process generates continuous and intense high-frequency vibrations and strong impacts, which pose a significant threat to the stability of the instrument's internal structure. Second, the well is usually filled with high-temperature, high-pressure drilling fluids, which are highly invasive.

[0004] In existing technologies, the internal electronic system of an instrument is usually mounted on an electronic frame, which is then fixed inside the instrument housing. However, conventional fixing methods can loosen or resonate under strong vibration and impact, causing the electronic frame to shift. This not only affects measurement accuracy but can also damage electronic components due to impact or connection failure in severe cases. At the same time, the sealing performance of the instrument housing will decrease over time under the combined effects of vibration and high pressure. Once a leak occurs, high-pressure drilling fluid will enter the instrument, causing short circuits and corrosion in the electronic system, leading to complete instrument failure.

[0005] Therefore, this utility model proposes a multi-functional drill bit to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the existing technology of multi-functional drill bits, such as the damage of internal electronic components due to insecure fixing under strong vibration, and the low reliability of the sealing structure under high pressure, which leads to the intrusion of external fluids, the present invention aims to provide a multi-functional drill bit with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a multifunctional drill bit, comprising: a hollow main body shell, a protective cap, a plug, a source chamber body, an electronic instrument skeleton, a connector holder, a piston sealing connector, an electronic skeleton, and an O-ring.

[0008] The connector holder uses a rigid snap-fit ​​method to achieve dual axial and radial positioning and fixing of the electronic instrument frame, while the O-ring is a ring-shaped elastic seal.

[0009] The two ends of the main body shell are detachably connected by a cap and a plug to form a closed sealed cavity. The source chamber body is set inside the cavity of the main body shell, while the electronic instrument skeleton is housed inside the source chamber body. The connector holder is snapped and fixed between the outer wall of the electronic instrument skeleton and the inner wall of the source chamber body to form a highly stable anti-vibration structure. The piston sealing connector is fixedly connected to the end of the source chamber body near the plug. The electronic skeleton is also fixed above the piston sealing connector. The O-ring surrounds and seals the joint between the piston sealing connector and the source chamber body, forming a reliable static sealing defense line.

[0010] Preferably, the source compartment body has a source compartment slot and a motor protective shell for protecting the internal motor. At the same time, an outer shell is connected to the outer periphery of the source compartment body. The source compartment slot provides a standardized installation position for placing the radiation source or key sensors. The motor protective shell physically wraps the drive motor to resist impact. The outer shell provides additional structural reinforcement and protection for the source compartment body.

[0011] Preferably, the multi-functional drill bit also includes a switch base and a wet connector. The switch base is set on the electronic instrument frame, which facilitates the operation of starting the instrument or switching modes on the ground. The wet connector is detachably connected to the main body shell and electrically connected to the electronic instrument frame. After the instrument is retrieved, it can be quickly and reliably connected to external devices to read the internally stored data, which greatly improves the efficiency of data export.

[0012] Preferably, the multi-functional drill bit also includes a probe housing and a sliding sleeve. The probe housing is located at one end of the main housing and is used to accommodate the measurement probe that directly contacts the formation. The sliding sleeve is installed on the outer periphery of the probe housing in a sleeved and sliding fit manner, providing stable sliding guidance for the probe housing, ensuring the stability of the probe's posture during measurement, thereby improving the quality of the measurement data.

[0013] Preferably, the multi-functional drill bit also includes a balance cylinder, which is fitted outside the main body shell and is connected to the downhole fluid pressure through an internal compensation medium. It can compensate for the huge external pressure generated by the downhole high-pressure environment on the instrument in real time, keeping the pressure difference between the inside and outside of the instrument within a very small range, thereby effectively preventing the instrument shell from being crushed by high pressure.

[0014] Preferably, the multi-functional drill bit also includes an upper connection and retrieval assembly, including a top connector fixedly connected to one end of the main body shell. The top connector has an elastic retaining ring around its outer periphery for quick locking with other tools. The top connector also houses a pull sleeve and a lower plug. The pull sleeve and the lower plug are fixedly connected for performing the lowering or retrieval operation of the instrument.

[0015] Preferably, the multi-functional drill bit also includes a hoisting connection assembly, including a hoisting cap base. The hoisting cap base is fixed to the top of the main body shell by means of a threaded connection using a threaded ring and a washer. The hoisting cap base is also provided with a retaining sleeve, which is used to axially limit the connecting parts to prevent accidental loosening during severe vibration, thus ensuring the safety of the entire instrument hoisting connection.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model solves the problems in the prior art where the electronic instrument frame is easily loosened and damaged in the strong vibration environment of the drilling instrument downhole, and the unreliable sealing structure leads to the intrusion of external fluids.

[0018] 2. This utility model solves the problem in the prior art where the outer shell or internal structure of the instrument is crushed and damaged due to the huge pressure difference between the inside and outside of the instrument in the high-pressure environment of deep wells by installing a balance cylinder on the outside of the main body shell. It realizes dynamic compensation of the downhole hydrostatic pressure, maintains the pressure balance between the inside and outside of the instrument, and thus enhances the instrument's adaptability to high-pressure environments.

[0019] 3. This utility model solves the problems of cumbersome data export process, unreliable connection, or long time consumption in the prior art of storage logging instruments after tripping out of the drill string by setting a detachable wet connector. It realizes fast and stable docking between the instrument and the ground equipment, thereby completing the data download efficiently and safely and improving the overall operation efficiency. Attached Figure Description

[0020] Figure 1 This is a front perspective view of a multifunctional drill bit proposed in this utility model;

[0021] Figure 2 for Figure 1 Enlarged view of the local structure at point A in the image;

[0022] Figure 3 for Figure 1 Enlarged view of the local structure at point B in the image.

[0023] Legend:

[0024] 1. Threaded ring; 2. Protective cap; 3. Balance cylinder; 4. Wet connector; 5. Pull sleeve; 6. Source chamber body; 7. Source chamber groove; 8. Piston sealing connector; 9. Outer shell one; 10. O-ring; 11. Motor protective shell; 12. Electronic frame; 13. Switch socket; 14. Electronic instrument frame; 15. Connector holder; 16. Top connector; 17. Elastic retaining ring; 18. Sliding sleeve; 19. Plug; 20. Probe housing; 21. Lower plug; 22. Gasket; 23. Hanging cap base; 24. Stop sleeve. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] Example:

[0027] Please refer to Figures 1 to 3 This utility model provides a multi-functional through-drill bit, which aims to solve the problem that existing logging-while-drilling instruments are damaged due to insecure fixing and poor sealing in the face of high pressure and strong vibration environments downhole.

[0028] like Figure 1 As shown, the multi-functional drill bit includes a hollow main shell. The two axial ends of the main shell are detachably connected by a protective cap 2 and a plug 19 to form a complete sealed cavity, providing a stable and protected installation environment for all internal functional components. The cavity of the main shell contains a source chamber body 6 and an electronic instrument frame 14 housed within the source chamber body 6. In order to achieve stable fixation of the electronic instrument frame 14 in the harsh downhole environment and ensure the sealing reliability of the entire internal module, the multi-functional drill bit is also equipped with a structure that integrates vibration resistance and sealing.

[0029] The structure integrating vibration resistance and sealing includes: a connector holder 15 and a piston sealing connector 8. The connector holder 15 is snapped and fixed between the outer wall of the electronic instrument frame 14 and the inner wall of the source chamber body 6. This rigid snapping method provides axial and radial double-limiting fixation for the electronic instrument frame 14, thereby effectively resisting the strong vibration and impact generated during drilling and ensuring that the electronic instrument frame 14 and the precision electronic components it carries will not be displaced or damaged. The piston sealing connector 8 is fixedly connected to one end of the source chamber body 6 near the plug 19. An electronic frame 12 is also fixed above the piston sealing connector 8. An O-ring 10 is also provided at the connection between the piston sealing connector 8 and the source chamber body 6. The O-ring 10 surrounds and seals the joint between the piston sealing connector 8 and the source chamber body 6. The elastic deformation of the O-ring 10 fills the tiny gaps in the joint, forming a static sealing structure, which effectively prevents external high-pressure fluid from entering the instrument through the gaps.

[0030] Please refer to Figure 1 and Figure 2The source chamber body 6 has a source chamber slot 7 inside, which is used to place the radiation source or sensor required to perform the measurement task. At the same time, a motor protective shell 11 is also set inside the source chamber body 6. The motor protective shell 11 covers and is fixed to the outside of the internal drive motor, providing solid physical protection for the motor and preventing the motor from being damaged under strong vibration conditions. On the outer periphery of the source chamber body 6, an outer shell 9 is also fixedly connected to provide additional structural reinforcement and protection for the source chamber body 6.

[0031] A switch base 13 is fixedly installed on the electronic instrument frame 14. The switch base 13 is used to switch the instrument's on / off state or enter the data transmission mode when operating on the ground or at the wellhead. The multi-functional drill bit also includes a wet connector 4, which is detachably connected to the main body shell. The electrical contacts inside the wet connector 4 are electrically connected to the electronic instrument frame 14, so that after the instrument completes the logging task and returns to the ground, the external data reading device can quickly and reliably connect to the wet connector 4 to achieve efficient download of the internally stored geological parameters.

[0032] As a preferred embodiment, in order to achieve accurate acquisition of geological parameters and ensure the stability of the probe's movement, the multi-functional drill bit also includes a probe housing 20 and a sliding sleeve 18. The probe housing 20 is located at one end of the main housing, while the sliding sleeve 18 is installed on the outer periphery of the probe housing 20 in a sleeved and sliding fit manner. It can provide stable guidance for the extension or retraction of the probe housing 20, ensuring that the probe housing 20 is stable in posture during measurement and avoiding data distortion caused by shaking.

[0033] As another preferred embodiment, in order to adapt to the downhole high-pressure environment and protect the internal structure from damage by huge pressure difference, the multi-functional drill bit also includes a balance cylinder 3. The balance cylinder 3 is sleeved on the outside of the main body shell and located on the radial outside of the source chamber body 6. It is connected to the downhole fluid pressure through the internal compensation oil or flexible bag to dynamically balance the pressure difference inside and outside the instrument, thereby protecting the main body shell and the internal precision components from being crushed by high pressure.

[0034] In another preferred embodiment, in order to realize the upper connection and positioning function of the instrument, the multi-functional drill bit also includes a top connector 16. The top connector 16 is fixedly connected to one end of the main body shell near the protective cap 2. An elastic retaining ring 17 is also provided on the outer periphery of the top connector 16. The elastic retaining ring 17 can be used to quickly lock and engage with external tools or sleeves, providing convenience for the recovery of the instrument or docking with other equipment.

[0035] As a further preferred option, please refer to Figure 3The multi-functional drill bit also includes a pull sleeve 5 and a lower plug 21. One end of the pull sleeve 5 is fixedly connected to the lower plug 21, and the two are housed together inside the top connector 16. The other end of the pull sleeve 5 is operably connected to the internal structure of the top connector 16, and can be used to perform instrument lowering, positioning or as a connection interface during retrieval.

[0036] In another preferred embodiment, in order to realize the hoisting of the entire instrument and the connection with the drill rod, the multi-functional drill bit also includes a hanging cap base 23. The hanging cap base 23 is firmly fixed to the top of the outer shell of the main body by means of a threaded connection through a threaded ring 1 and a washer 22, wherein the washer 22 is used to ensure the tightness and sealing of the connection. The hanging cap base 23 is also provided with a retaining sleeve 24, which is fitted at a specific position on the hanging cap base 23 to axially limit other connecting parts.

[0037] Working principle: Before the well operation, the instrument is first started by operating the switch seat 13 installed on the electronic instrument frame 14. Then, the lifting cap base 23 is used and the lifting cap base 23 is threadedly connected to the lowering tool through the threaded ring 1 and the washer 22. The entire instrument is sent to the predetermined measurement position at the bottom of the well through the drill pipe water hole. During the lowering and subsequent operations, the retaining sleeve 24 on the lifting cap base 23 and the elastic retaining ring 17 on the top connector 16, etc., ensure the structural stability of each connection part in the vibration environment.

[0038] During the drilling process and geological parameter acquisition, the probe housing 20 measures under the stable guidance of the sliding sleeve 18. The acquired signals are processed and stored by the electronic system housed within the electronic instrument frame 14. In the face of strong vibration and impact environments downhole, the connector bracket 15 can firmly clamp and fix the electronic instrument frame 14 inside the source chamber body 6, effectively preventing the electronic components from loosening or being damaged due to vibration. At the same time, the multiple sealing system composed of the caps 2 and plugs 19 at both ends of the main housing, and the piston sealing connector 8 and O-ring 10 at the end of the source chamber body 6, can completely isolate the internal cavity from the external high-pressure fluid. Meanwhile, the balance cylinder 3 fitted on the outside compensates for the huge hydrostatic pressure downhole in real time. Through this three-in-one synergistic effect of vibration resistance, sealing, and pressure balance, the problem of damage to the core components inside the instrument under harsh working conditions in the prior art is solved.

[0039] After the logging task is completed, the instrument is pulled up with the drill string and returned to the surface. At this time, the special surface equipment quickly docks with the wet connector 4 on the instrument to read all the measurement data stored in the electronic instrument frame 14, thus completing the entire logging operation. The pull sleeve 5 and the lower plug 21 set in the top connector 16 can be used for the retrieval or recovery of the instrument when needed.

Claims

1. A multi-functional drill bit, comprising a hollow main body shell, wherein the two axial ends of the main body shell are detachably connected by a protective cap (2) and a plug (19) to form a sealed cavity, and a source chamber body (6) and an electronic instrument skeleton (14) are provided in the cavity of the main body shell. Its features are, The multi-functional drill bit also includes: a connector holder (15), a piston sealing connector (8), and an O-ring (10). The connector holder (15) is snapped and fixed between the outer wall of the electronic instrument frame (14) and the inner wall of the source chamber body (6) to perform axial and radial double limiting and fixing of the electronic instrument frame (14). The piston sealing connector (8) is fixedly connected to one end of the source chamber body (6) near the plug (19). An electronic frame (12) is also fixed above the piston sealing connector (8). The O-ring (10) surrounds and seals the joint between the piston sealing connector (8) and the source chamber body (6).

2. The multifunctional drill bit according to claim 1, characterized in that, The source chamber body (6) is provided with a source chamber slot (7), and a motor protective shell (11) for protecting the internal motor is also provided in the source chamber body (6). The outer periphery of the source chamber body (6) is connected to a shell (9).

3. A multi-functional drill bit according to claim 1, characterized in that, The multi-functional drill bit also includes a wet connector (4), which is detachably connected to the main body shell and electrically connected to the electronic instrument frame (14). The electronic instrument frame (14) is provided with a switch base (13) for switching working states.

4. A multi-functional drill bit according to claim 1, characterized in that, The multi-functional drill bit also includes a probe housing (20) and a sliding sleeve (18). The probe housing (20) is disposed at one end of the main housing, and the sliding sleeve (18) is sleeved and slidably fitted on the outer periphery of the probe housing (20) to ensure that the probe housing (20) can slide stably.

5. A functional drill bit according to claim 1, characterized in that, It also includes a balance cylinder (3), which is sleeved on the outside of the main body shell and located on the radial outside of the source chamber body (6) to balance the internal and external pressure difference.

6. A multifunctional drill bit according to claim 1, characterized in that, It also includes a top connector (16), which is fixedly connected to one end of the main body shell near the cap (2), and the outer periphery of the top connector (16) is provided with an elastic retaining ring (17).

7. A multifunctional drill bit according to claim 6, characterized in that, It also includes a pull sleeve (5) and a lower plug (21), one end of which is fixedly connected to the lower plug (21), and the other end is operably connected to the interior of the top connector (16) for performing a lowering or retraction operation.

8. A multifunctional drill bit according to claim 1, characterized in that, It also includes a hanging cap base (23), which is fixed to the top of the main body shell by means of a threaded connection through a threaded ring (1) and a gasket (22).

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