CN116696228B - Screw drilling tool with self-adjusting output torque - Google Patents

Screw drilling tool with self-adjusting output torque Download PDF

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Publication number
CN116696228B
CN116696228B CN202310976459.4A CN202310976459A CN116696228B CN 116696228 B CN116696228 B CN 116696228B CN 202310976459 A CN202310976459 A CN 202310976459A CN 116696228 B CN116696228 B CN 116696228B
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China
Prior art keywords
assembly
drill bit
motor assembly
elastic piece
universal joint
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Active
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CN202310976459.4A
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Chinese (zh)
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CN116696228A (en
Inventor
钟文
何周文
李勇刚
周尚礼
徐强
尚义友
李芳杰
毛志彬
江杰
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Sichuan Deep & Fast Oil Drilling Tools Co ltd
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Sichuan Deep & Fast Oil Drilling Tools Co ltd
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Priority to CN202310976459.4A priority Critical patent/CN116696228B/en
Publication of CN116696228A publication Critical patent/CN116696228A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00Drives for drilling, used in the borehole
    • E21B4/02Fluid rotary type drives
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00Drives for drilling, used in the borehole
    • E21B4/006Mechanical motion converting means, e.g. reduction gearings
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

The application discloses a screw drilling tool with self-adjusting output torque, which relates to the technical field of petroleum drilling equipment and comprises a motor assembly, a universal joint assembly, a transmission shaft assembly and a drill bit which are sequentially connected, and also comprises an elastic piece, wherein the elastic piece is arranged between any two sections of the motor assembly, the universal joint assembly, the transmission shaft assembly and the drill bit. The torque of the drill bit can be automatically regulated according to the hardness degree of the stratum in the use process, so that the force of the drill bit is consistent with the force required by stratum drilling all the time when the drill bit aims at the stratum with different hardness degrees, the energy is saved, the abrasion of the rubber bushing and the rotor is reduced, and the service life of the screw drilling tool is greatly prolonged.

Description

Screw drilling tool with self-adjusting output torque
Technical Field
The application relates to the technical field of petroleum drilling equipment, in particular to a screw drilling tool with self-adjusting output torque.
Background
The screw drilling is a drilling mode in which drilling fluid is used as power and hydraulic pressure energy is converted into mechanical energy through a screw drilling tool. In the drilling process, the screw drilling tool plays a role in rotating and crushing the stratum, the pipe body at the upper end of the screw drilling tool plays a role in connecting and supporting and conveying liquid, the crushing of the screw drilling tool on the stratum is influenced by the degree of softness of the stratum, the resistance of the screw drilling tool is smaller when the stratum is soft, the required hydraulic load is lower, the resistance of the screw drilling tool is larger when the stratum is hard, and the required hydraulic load is higher; meanwhile, the degree of softness of the stratum is distributed irregularly in the vertical direction, so that the resistance born by the screw drilling tool in the drilling process is changed continuously, the screw drilling tool is vibrated, the resistance can be increased due to vibration at the drill bit at the front end of the screw drilling tool, the screw drilling tool can be operated under the condition of high damping, the initial load of the screw drilling tool is high, when the screw drilling tool drills into the stratum with soft feet, the screw drilling tool does not need to be operated under high load, the rubber bushing and the drill in the screw drilling tool are worn rapidly after the screw drilling tool is worn for a long time, and the service life of the screw drilling tool is greatly shortened.
Disclosure of Invention
The application aims to provide the screw drilling tool with the self-regulating output torque, so that the torque of the drill bit can be automatically regulated according to the hardness degree of the stratum in the use process of the screw drilling tool, and the force of the drill bit is consistent with the force required by stratum drilling when aiming at the stratum with different hardness degrees, thereby saving energy, being beneficial to reducing the abrasion of the rubber bushing and the rotor and greatly prolonging the service life of the screw drilling tool.
In order to achieve the aim of the application, the technical scheme adopted is as follows: the utility model provides a take screw rod drilling tool of self-interacting output torque, includes motor assembly, universal joint assembly, transmission shaft assembly and the drill bit that connects gradually, still includes the elastic component, and the elastic component is installed between arbitrary two sections in motor assembly, universal joint assembly, transmission shaft assembly and the drill bit.
Further, the elastic piece is arranged between the motor assembly and the universal joint assembly, and two ends of the connecting spring are respectively fixed with the rotor output end of the motor assembly and the connecting seat of the universal joint assembly.
Further, the elastic piece is a connecting spring.
Further, the connecting spring is a sleeve with a spiral groove formed in the circumferential surface, and the spiral direction of the spiral groove is the same as the rotation direction of the rotor in the motor assembly.
Further, the two ends of the spiral groove do not penetrate through the end faces of the two ends of the sleeve.
Further, the elastic pieces are multiple, and the elastic pieces are respectively or serially arranged between any two sections of the motor assembly, the universal joint assembly, the transmission shaft assembly and the drill bit.
Further, the outer wall of the upper TC bearing moving coil, the inner wall of the upper TC bearing static coil, the outer wall of the lower TC bearing moving coil and the inner wall of the lower TC bearing static coil of the transmission shaft assembly are all provided with hard alloy layers.
Further, the surface of the rubber bushing and the surface of the rotor of the motor assembly are coated with wear-resistant heat insulation layers.
The beneficial effects of the application are as follows:
in the drilling process, aiming at stratum with different hardness, the resistance of the drill bit in the drilling process can be transmitted to the elastic piece, the torque generated by the motor assembly is also transmitted to the elastic piece, so that the elastic piece is adaptively screwed, the torque of the motor assembly is transmitted while the elastic piece is screwed, in the transmission process, the torque required by the drill bit is different according to the different resistance of the drill bit in the drilling process, the screwing degree of the elastic piece after being stressed can be changed, the redundant torque generated by the motor assembly is absorbed by the elastic piece, the effect of outputting different torques is realized, the torque of the drill bit is consistent with the torque required by stratum drilling when the drill bit aims at stratum with different degrees of softness, the energy is saved, the abrasion of a rubber bushing and a rotor is reduced, and the service life of the screw drilling tool is greatly prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application.
FIG. 1 is a cross-sectional view of a screw drilling tool with self-adjusting output torque provided by the present application;
fig. 2 is a schematic structural view of the connection spring.
The reference numerals and corresponding part names in the drawings:
1. the bypass valve assembly, 2, the anti-drop joint, 3, the motor assembly, 4, the universal joint assembly, 5, the transmission shaft assembly, 6, the connecting spring, 7, the hard alloy layer;
61. sleeve, 62, helical groove.
Description of the embodiments
The present application will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the substances, and not restrictive of the application. It should be further noted that, for convenience of description, only the portions related to the present application are shown in the drawings.
In addition, the embodiments of the present application and the features of the embodiments may be combined with each other without collision. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 and 2, the application provides a screw drilling tool with self-adjusting output torque, which comprises a bypass valve assembly 1, an anti-drop joint 2, a motor assembly 3, a universal joint assembly 4, a transmission shaft assembly 5 and a drill bit which are sequentially connected, wherein the structures of the bypass valve assembly 1, the anti-drop joint 2, the motor assembly 3, the universal joint assembly 4, the transmission shaft assembly 5 and the drill bit are all directly used as the existing structures on the screw drilling tool. And elastic pieces are connected between any two joints among the motor assembly 3, the universal joint assembly 4, the transmission shaft assembly 5 and the drill bit, namely, the elastic pieces can be arranged between the motor assembly 3 and the universal joint assembly 4, between the universal joint assembly 4 and the transmission shaft assembly 5 and between the transmission shaft assembly 5 and the drill bit.
In the application, the elastic piece is used as a connecting piece to play a role in connecting two adjacent sections, and the torque generated by the motor assembly 3 needs to be transmitted to the drill bit in the stratum drilling process of the screw drilling tool, so that the elastic piece also needs to play a role in transmitting the torque of the motor assembly 3.
In the application, the elastic piece has an elastic function, when the torque received by the elastic piece is larger and all the torque provided by the motor assembly 3 is needed, the elastic piece is completely screwed up, the length of the elastic piece cannot be continuously shortened, at the moment, the torque generated by the motor assembly 3 is completely transmitted through the elastic piece, and the torque of the drill bit is the maximum torque of the motor assembly 3 and also the maximum torque of the drill bit in the drilling process; when the torque received by the elastic piece is smaller, the elastic piece can not be screwed up again after being screwed up to a certain degree, at the moment, the elastic piece still has a certain expansion space, the torque generated by the motor assembly 3 can be transmitted through the elastic piece, but when the torque received by the elastic piece is larger than the torque required by the drill bit, the elastic piece can absorb the redundant torque through continuous screwing up, so that the torque finally transmitted to the drill bit through the elastic piece is the torque required by the drill bit.
In the drilling process, aiming at stratum with different hardness, the resistance of the drill bit in the drilling process can be transmitted to the elastic piece, the torque generated by the motor assembly 3 is also transmitted to the elastic piece, so that the elastic piece is adaptively screwed, the torque of the motor assembly 3 is transmitted while the elastic piece is screwed, in the transmission process, the torque required by the drill bit is different according to the different resistance of the drill bit in the drilling process, the screwing degree of the elastic piece after being stressed can be changed, the redundant torque generated by the motor assembly 3 is absorbed by the elastic piece, the effect of outputting different torques is realized, the torque of the drill bit is consistent with the torque required by stratum drilling when the drill bit aims at stratum with different degrees of softness, the energy is saved, the abrasion of a rubber bushing and a rotor is reduced, and the service life of a screw drill is greatly prolonged.
The elastic piece is arranged between the motor assembly 3 and the universal joint assembly 4, one end of the elastic piece is fixed with the rotor output end of the motor assembly 3, and the other end of the elastic piece is fixed with the connecting seat of the universal joint assembly 4; meanwhile, in order to enable the elastic piece to meet the structure of the existing motor assembly 3 and the universal joint assembly 4 in the screw drilling tool during installation, one end, connected with the universal joint assembly 4, of the connecting spring 6 is provided with a sleeve structure, one end, connected with the motor assembly 3, of the connecting spring 6 is provided with a plug structure, one end of the elastic piece can be fixed after being inserted into the rotor output end of the motor assembly 3 through the plug structure, the other end of the elastic piece can be fixed after being sleeved on a connecting seat of the universal joint assembly 4 through the sleeve structure, and the connecting modes of the elastic piece, the motor assembly 3 and the universal joint assembly 4 can be in threaded connection, screw connection and the like. When the elastic piece is connected with the motor assembly 3 and the universal joint assembly 4 by screws, after the elastic piece is inserted into the rotor output end of the motor assembly 3 and the elastic piece is sleeved on the connecting seat of the universal joint assembly 4, a plurality of screws are adopted to uniformly tighten the elastic piece from the circumferential direction, and in order to enable the connecting positions of the elastic piece, the motor assembly 3 and the universal joint assembly 4 to be flatter, screw holes on the motor assembly 3 and the universal joint assembly 4 can be countersunk holes.
According to the application, the elastic piece is preferentially arranged between the motor assembly 3 and the universal joint assembly 4, so that on one hand, the power of the motor assembly 3 can be immediately transmitted to the elastic piece, the response of the elastic piece is quicker, and on the other hand, enough space is reserved between the outer wall of the elastic piece and the shell of the screw drilling tool for mud to pass through, and the influence on the transmission of the mud is avoided. Of course, the elastic member may be arranged between any two of the motor assembly 3, the universal joint assembly 4, the propeller shaft assembly 5 and the drill bit at will without taking into consideration factors such as slurry transportation; meanwhile, when the transmission shaft in the transmission shaft assembly 5 is multi-segment, the elastic piece can also be installed between any two segments of transmission shafts in the transmission shaft assembly 5.
The elastic piece is the connecting spring 6, and the connecting spring 6 is made of metal materials with high strength, so that the elastic piece can be made to have enough strength when being stretched by tightening after being stressed, and the elastic piece can be ensured to transmit torque generated by the motor assembly 3.
The connecting spring 6 is a sleeve 61 with a spiral groove 62 on the circumferential surface, the spiral groove 62 is a through groove, in order to enable the connecting spring 6 to be matched with the motor assembly 3 and the universal joint assembly 4, one end of the connecting spring 6 connected with the universal joint assembly 4 is opened, and the plug structure is positioned at one end of the connecting spring 6 connected with the motor assembly 3; meanwhile, the spiral direction of the spiral groove 62 is the same as the rotation direction of the rotor in the motor assembly 3, so that after the motor assembly 3 transmits torque to the connecting spring 6, the connecting spring 6 can be screwed down along the spiral direction of the spiral groove 62 after receiving the torque, the connecting spring 6 is compressed, and damage to the connecting spring 6 is avoided.
The two ends of the spiral groove 62 do not penetrate through the end surfaces of the two ends of the sleeve 61, so that the connecting spring 6 is not in a spiral strip structure, the connection of the connecting spring 6 with the motor assembly 3 and the universal joint assembly 4 is facilitated, the connecting spring 6 can be screwed and compressed after being stressed, the connecting spring 6 has enough strength, and the transmission of torque generated by the motor assembly 3 is ensured. Of course, in the case where both ends of the spiral groove 62 do not penetrate through both end faces of the sleeve 61, the spiral groove 62 on the sleeve 61 may be plural in number, and the plural spiral grooves 62 may be arranged at regular intervals in the circumferential direction of the sleeve 61 while ensuring the strength of the connecting spring 6 itself.
Of course, in the present application, the number of the elastic members may be plural. When there are a plurality of elastic members, the plurality of elastic members are respectively installed between any two of the motor assembly 3, the universal joint assembly 4, the transmission shaft assembly 5 and the drill bit, for example, when there are two elastic members, the two elastic members may be respectively installed between the motor assembly 3 and the universal joint assembly 4, the transmission shaft assembly 5 and the drill bit; meanwhile, when there are a plurality of elastic members, the plurality of elastic members may be sequentially connected in series and then mounted between any two of the motor assembly 3, the universal joint assembly 4, the transmission shaft assembly 5 and the drill bit, for example, after the plurality of elastic members are sequentially connected in series and assembled into a longer elastic member, the assembled whole elastic member is directly mounted between the motor assembly 3 and the universal joint assembly 4.
The hard alloy layers 7 are arranged on the outer wall of the upper TC bearing moving coil, the inner wall of the upper TC bearing static coil, the outer wall of the lower TC bearing moving coil and the inner wall of the lower TC bearing static coil of the transmission shaft assembly 5, so that the rigidity requirement of the transmission shaft in the transmission shaft assembly 5 on the shock resistance is improved.
The surface of the rubber bushing and the surface of the rotor of the motor assembly 3 are coated with wear-resistant heat insulation layers, so that the wear resistance of the rubber bushing and the rotor in the motor assembly 3 is improved, and the service lives of the rubber bushing and the rotor are prolonged.
In the application, when drilling is needed, mud is conveyed into the motor assembly 3 through the mud pump, the rotor in the mud driving motor assembly 3 in the motor assembly 3 rotates, when a drill bit does not drill, the drill bit does not bear resistance, so that the connecting spring 6 cannot bear resistance transmitted by the drill bit, at the moment, the rotor directly drives the connecting spring 6 to rotate while rotating, the connecting spring 6 directly transmits to the drill bit through the transmission shaft assembly 5 and the universal shaft assembly while rotating, and the drill bit idles; when the drill bit drills, the drill bit can receive resistance, the resistance received by the drill bit is transmitted to the connecting spring 6 through the transmission shaft assembly 5 and the universal shaft assembly, the torque of the rotor in the motor assembly 3 is also transmitted to the connecting spring 6, after the connecting spring 6 receives the resistance of the drill bit and the torque of the rotor in the motor assembly 3, the connecting spring 6 can absorb the torque difference of the resistance and the torque of the rotor in the motor assembly 3 through tightening and compressing, so that the torque of the rotor in the motor assembly 3 is consistent with the torque required by drilling of the drill bit, and the torque of the drill bit is self-adjusting.
When high torque is required, the connecting spring 6 contracts, the rotor in the motor assembly 3 moves downwards, the matching length of the rotor in the motor assembly 3 increases, and the output torque increases; when low torque is required, the connecting spring 6 is extended, the rotor in the assembly moves upwards, the matching length of the rotor in the assembly is shortened, and the output torque is reduced. The application can realize the self-adaptive adjustment of the output torque, achieves the effect of different output torques, saves energy and is beneficial to protecting rubber and a rotor.
In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "a particular example," "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the application. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
It will be appreciated by persons skilled in the art that the above embodiments are provided for clarity of illustration only and are not intended to limit the scope of the application. Other variations or modifications will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present application.

Claims (5)

1. The screw drilling tool with the self-adjusting output torque is characterized by comprising a motor assembly (3), a universal joint assembly (4), a transmission shaft assembly (5) and a drill bit which are sequentially connected, and further comprising an elastic piece, wherein the elastic piece is arranged between any two sections of the motor assembly (3), the universal joint assembly (4), the transmission shaft assembly (5) and the drill bit; the elastic piece is a connecting spring (6), the tightening degree of the elastic piece after being stressed is correspondingly changed according to different torques required by the drill bit in the drilling process, so that redundant torques generated by the motor assembly are absorbed by the elastic piece, different torques are output, and the torque of the drill bit is consistent with the torque required by the formation drilling when aiming at formations with different degrees of softness and hardness; the connecting spring (6) is a sleeve (61) with a spiral groove (62) on the circumferential surface, and the spiral direction of the spiral groove (62) is the same as the rotation direction of a rotor in the motor assembly (3); the two ends of the spiral groove (62) do not penetrate through the end faces of the two ends of the sleeve (61).
2. The screw drilling tool with self-adjusting output torque according to claim 1, wherein the elastic piece is installed between the motor assembly (3) and the universal joint assembly (4), and two ends of the connecting spring (6) are respectively fixed with the rotor output end of the motor assembly (3) and the connecting seat of the universal joint assembly (4).
3. The screw drilling tool with self-adjusting output torque according to claim 1 or 2, wherein the elastic members are plural, and the elastic members are installed between any two sections of the motor assembly (3), the universal joint assembly (4), the transmission shaft assembly (5) and the drill bit, respectively or after being connected in series.
4. A screw drill with self-adjusting output torque according to claim 3, characterized in that the upper TC bearing moving coil outer wall, upper TC bearing stationary coil inner wall, lower TC bearing moving coil outer wall, lower TC bearing stationary coil inner wall of the drive shaft assembly (5) are all provided with cemented carbide layers (7).
5. A screw drilling tool with self-regulating output torque according to claim 3, characterized in that the rubber bushing surface, the rotor surface of the motor assembly (3) are coated with a wear-resistant heat insulating layer.
CN202310976459.4A 2023-08-04 2023-08-04 Screw drilling tool with self-adjusting output torque Active CN116696228B (en)

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CN116696228B true CN116696228B (en) 2023-11-28

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CN115874915A (en) * 2021-09-29 2023-03-31 中国石油化工股份有限公司 Self-adaptive screw drill
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