CN107489381B - Overload-proof screw drilling tool - Google Patents
Overload-proof screw drilling tool Download PDFInfo
- Publication number
- CN107489381B CN107489381B CN201710899367.5A CN201710899367A CN107489381B CN 107489381 B CN107489381 B CN 107489381B CN 201710899367 A CN201710899367 A CN 201710899367A CN 107489381 B CN107489381 B CN 107489381B
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- China
- Prior art keywords
- nipple
- spline
- assembly
- drilling tool
- transmission
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
- E21B12/04—Drill bit protectors
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse 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
Abstract
The invention relates to an overload prevention screw drilling tool, which comprises a bypass valve assembly, a motor assembly, a universal joint assembly and a transmission shaft assembly, wherein the four assemblies are sequentially connected in a threaded manner from top to bottom to form the screw drilling tool, an overload prevention assembly is further arranged between the universal joint assembly and the transmission shaft assembly, when the screw drilling tool is in overload operation, when the torque transmitted to a transmission nipple by a transmission shaft is overlarge and exceeds a set value, the pressure provided by a disc spring group is insufficient to keep the contact state of the toothed structures of the spline nipple and the transmission nipple, the toothed structures of the transmission nipple and the toothed structures of the spline nipple are separated in the axial direction, so that the excessive torque is prevented from being transmitted to the spline nipple and the universal joint assembly and the motor assembly above, the damage of the motor assembly caused by overlarge pressure drop of the motor is avoided, and the service life of the screw drilling tool is effectively prolonged.
Description
Technical Field
The invention belongs to the field of petroleum drilling tools, and particularly relates to an overload-prevention screw drilling tool capable of coping with overload conditions.
Background
The screw drilling tool is a common underground power drilling tool, and the conventional screw drilling tool mainly comprises a bypass valve assembly, a motor assembly, a universal joint assembly and a transmission shaft assembly. During drilling, the drilling fluid drives the motor assembly to output power, and the power output is transmitted to a drill bit connected with the lower part of the screw drilling tool through the universal joint assembly and the transmission shaft assembly so as to perform drilling work. The stator component of the motor assembly is lined with a rubber profile and the rotor parts form a motor pair. When the screw drilling tool is used, the drilling weight is not very stable due to bending of the well body or sticking of the drill string on the well wall, if the drilling weight is too large, the output torque of the motor exceeds the highest pressure drop which can be born by the rubber structure, the motor parts are damaged, the service life of the screw drilling tool is shortened, the working efficiency of the screw drilling tool is reduced, and if the motor parts are damaged due to overload in use, the efficiency of production operation can be seriously affected.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects of the prior art and providing an overload-proof screw drilling tool, which has reasonable structural design and convenient installation and use and effectively solves the problem that motor parts are damaged because overload working conditions cannot be handled.
The technical scheme of the invention is as follows: an overload-proof screw drilling tool comprises a bypass valve assembly, a motor assembly, a universal joint assembly and a transmission shaft assembly, wherein the four assemblies are sequentially connected in a threaded mode from top to bottom to form the screw drilling tool.
The overload prevention screw drilling tool further comprises an overload prevention assembly, the overload prevention assembly is connected between the universal joint assembly and the transmission shaft assembly through threads, and the overload prevention assembly can disconnect the motor from the transmission shaft assembly from the inside when the load torque is overlarge due to overlarge weight on bit.
The overload prevention assembly comprises a shell, an upper short section, a spline short section, a transmission short section, a disc spring group, a spline and a step cover. The upper short section is of a cylindrical structure, the upper end of the upper short section is provided with a connecting thread, the lower part of the upper short section is provided with a section of inner hole, the inner circular surface of the inner hole is provided with a plurality of spline grooves along the circumference of the inner circular surface, and the outer circle of the inner hole is provided with a step through hole capable of accommodating the steel ball. The step cover is arranged on the step through hole through a set screw. The spline nipple is of a hollow shaft structure, spline grooves corresponding to the number of the spline grooves on the inner circle surface of the inner hole of the upper nipple are formed in the outer circle surface of the spline nipple along the circumference of the spline nipple, the lower end face of the spline nipple is of a tooth-shaped structure, and the tooth-shaped structure is unfolded into a specific line shape along the circumference of the spline nipple. The lower end of the transmission nipple is provided with a connecting thread, the upper end face of the transmission nipple is of a toothed structure, and an arc groove capable of accommodating the steel ball is formed in the excircle of the toothed structure. The disc spring group is provided with an inner hole of the upper nipple, the upper nipple is in sliding connection with the spline nipple through a spline, the lower end of the spline nipple is connected with the transmission nipple, the shell is of a hollow cylinder structure, and the shell is sleeved on a part assembly formed by the upper nipple, the disc spring group, the spline nipple and the transmission nipple.
Further, the upper short section is of a cylindrical structure, the upper end of the upper short section is provided with threads connected with universal joint parts inside the universal joint assembly, a section of inner hole is formed in a part of the cylinder at the lower part of the upper short section, 5 spline grooves are formed in the inner circular surface of the inner hole along the circumference of the inner circular surface, a step through hole with a diameter allowing a steel ball to pass through is formed in the position of the outer circular surface, which is a distance away from the lower end surface of the upper short section, and a hard alloy sheet is inlaid in the lower end surface of the upper short section.
Further, the spline nipple is of a hollow shaft structure, part of the outer circular surface of the upper portion of the spline nipple is provided with spline grooves corresponding to the number of the spline grooves of the inner hole of the upper nipple along the circumference of the part of the outer circular surface, the spline nipple is in sliding connection with the upper nipple through a spline, the lower end face of the spline nipple is processed into a toothed structure, and the toothed structure is unfolded into a specific line shape along the circumference of the toothed structure.
Further, the transmission nipple is a step shaft part with threads at the lower end and connected with a transmission shaft part in the transmission shaft assembly, the upper end face of the transmission nipple is processed into a tooth-shaped structure meshed with the lower end face of the spline nipple, the tooth-shaped structure is unfolded into a specific line shape along the circumference of the transmission nipple, an arc groove for accommodating a steel ball is formed in the outer circle of the transmission nipple, and the arc groove corresponds to the step through hole in the upper nipple in position.
Further, the shell is of a hollow cylinder structure, a step through hole is formed in the center of the shell, external threads connected with the universal joint assembly shell are formed in the upper end of the shell, and internal threads connected with the transmission shaft assembly shell are formed in the lower end of the shell.
Further, hard alloy sheets are inlaid on the lower end face of the toothed structure of the spline nipple and the upper end face of the toothed structure of the transmission nipple.
Further, the disc spring group is composed of 6 disc springs.
Further, the spline is a steel flat key.
Further, the step cover is of a step steel column structure, and is installed in the step through hole on the upper short section through a set screw and positioned.
Compared with the prior art, the invention has the following beneficial effects:
1. the overload prevention assembly added to the overload prevention screw drilling tool is a modularized assembly, has reasonable structural design and easy assembly, effectively improves the installation and replacement efficiency of the screw drilling tool, changes the screw drilling tool into the overload prevention screw drilling tool on the basis of the conventional screw drilling tool, and improves the utilization rate of the drilling tool.
2. According to the overload-prevention screw drilling tool, when the load torque is overlarge due to overlarge drilling pressure, the overload-prevention assembly can disconnect the motor from the transmission shaft assembly from the inside, so that the damage of motor rubber can be avoided, the problem that the motor part of the drilling tool is damaged due to overload working conditions is effectively solved, and the service life of the screw drilling tool is prolonged.
3. The overload-proof screw drill can generate periodic axial vibration signals when in overload, is beneficial to finding problems at a well mouth, and is convenient for operators to remove or solve hidden troubles to drilling tools or drilling operations in production operations in time.
4. In various complicated working conditions, the drilling pressure of the screw drilling tool is easy to control, and the drilling speed and the drilling quality of the screw drilling tool are effectively improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural view of an overload prevention assembly according to the present invention.
In the figure: the device comprises a 1-bypass valve assembly, a 2-motor assembly, a 3-universal joint assembly, a 4-overload prevention assembly, a 5-transmission shaft assembly, a 6-upper short joint, a 7-shell, an 8-spline short joint, a 9-transmission short joint, a 10-disc spring group, 11-splines, a 12-step cover, 13-steel balls and 14-set screws.
Description of the embodiments
The present invention is further described below with reference to the drawings of the specification so that those skilled in the art can better understand the technical solutions of the present invention.
An overload-proof screw drilling tool, as shown in fig. 1 and 2, comprises a bypass valve assembly 1, a motor assembly 2, a universal joint assembly 3 and a transmission shaft assembly 5, wherein the four assemblies are sequentially connected into the screw drilling tool through threads from top to bottom.
The overload prevention screw drilling tool further comprises an overload prevention assembly 4, the overload prevention assembly 4 is connected between the universal joint assembly 3 and the transmission shaft assembly 5 through threads, and when the drilling pressure is excessive and the load torque is excessive, the overload prevention assembly 4 can disconnect the motor from the transmission shaft assembly from the inside.
The overload prevention assembly 4 comprises a shell 7, an upper nipple 6, a spline nipple 8, a transmission nipple 9, a disc spring set 10, a spline 11 and a step cover 12. The upper nipple 6 is of a cylindrical structure, the upper end of the upper nipple is provided with threads connected with universal joint parts inside the universal joint assembly 3, a section of inner hole is formed in a part of the cylinder at the lower part of the upper nipple, 5 spline grooves are formed in the inner circular surface of the inner hole along the circumference of the inner hole, a step through hole with a diameter allowing the steel ball 13 to pass through is formed in the position of the outer circular surface, which is a distance away from the lower end surface of the upper nipple 6, of the upper nipple, and a hard alloy sheet is inlaid in the lower end surface of the upper nipple 6. The step cover 12 is a step steel column structure and is installed and positioned in the step through the set screw 14. The spline nipple 8 is of a hollow shaft structure, part of the outer circular surface of the upper part of the spline nipple is provided with spline grooves corresponding to the number of the spline grooves of the inner hole of the upper nipple 6 along the circumference of the part of the outer circular surface, the spline nipple 8 is in sliding connection with the upper nipple 6 through a spline 11, the lower end face of the spline nipple 8 is processed into a toothed structure, and the toothed structure is unfolded into a specific line shape along the circumference of the toothed structure. The transmission nipple 9 is a step shaft part with threads at the lower end and connected with a transmission shaft part in the transmission shaft assembly 5, the upper end face of the transmission nipple is processed into a tooth-shaped structure meshed with the lower end face of the spline nipple 8, the tooth-shaped structure is unfolded into a specific line shape along the circumference of the transmission nipple, an arc groove for accommodating the steel ball 13 is formed in the outer circle of the transmission nipple apart from the tooth-shaped structure, and the arc groove corresponds to the step through hole on the upper nipple 6. Cemented carbide pieces are respectively inlaid on the lower end face of the toothed structure of the spline nipple 8 and the upper end face of the toothed structure of the transmission nipple 9. The disc spring group 10 is composed of 6 disc springs, the disc springs are installed in an inner hole of the upper nipple 6, the upper nipple 6 is in sliding connection with the spline nipple 8 through a spline 11, the lower end of the spline nipple 8 is connected with the transmission nipple 9, the shell 7 is of a hollow cylinder structure, a step through hole is arranged in the center of the hollow cylinder structure, an external thread connected with a shell of the universal joint assembly 3 is arranged at the upper end of the shell 7, an internal thread connected with a shell of the transmission shaft assembly 5 is arranged at the lower end of the shell 7, and the shell 7 is sleeved on a part assembly formed by the upper nipple 6, the disc spring group 10, the spline nipple 8 and the transmission nipple 9.
Mounting of overload prevention components: the disc spring group 10 is firstly arranged in the inner hole of the upper nipple 6, the spline 11 is arranged in the spline groove of the spline nipple 8 and is tightly attached to the disc spring group 10 together, the upper nipple 6 is arranged, and the tooth-shaped structure of the lower end face of the spline nipple 8 faces downwards. The toothed structure of the transmission nipple 9 is meshed with the lower end face of the spline nipple upwards, the upper nipple 6 is assembled and the spline nipple 8 is compressed, a plurality of steel balls 13 are assembled into the circular arc groove of the transmission nipple 9 from the side hole of the upper nipple 6 to be filled, and the step cover 12 is covered on the step hole of the upper nipple 6 and locked by the set screw 14. An overload prevention component is formed on the part assembly jacket by a shell 7.
The bypass valve assembly 1, the motor assembly 2, the universal joint assembly 3, the overload prevention assembly 4 and the transmission shaft assembly 5 are sequentially connected through threads to form the overload prevention screw drilling tool.
The working process comprises the following steps:
the working process of the overload-proof screw drilling tool is divided into two states of normal working and overload working.
When the screw drilling tool produced by the invention is in normal operation, after the drilling mud pump is started, the drilling fluid drives the motor rotor and the universal joint to rotate, the universal joint drives the upper nipple 6 and the spline nipple 8 to rotate through the spline 11, and the spline nipple 8 drives the transmission nipple 9 to rotate through the toothed structure so as to drive the transmission shaft part of the transmission shaft assembly 5 to rotate, so that the purpose of power output is achieved. When overload is carried out, the torque transmitted to the transmission nipple 9 by the transmission shaft exceeds a set value, the pressure provided by the disc spring group 10 is insufficient to keep the contact state of the spline nipple 8 and the toothed structure of the transmission nipple 9, the toothed structure of the transmission nipple 9 and the toothed structure of the spline nipple 8 are separated in the axial direction, so that the excessive torque is prevented from being transmitted to the spline nipple 8 and the universal joint assembly 3 and the motor assembly 2 above, the motor pressure drop is prevented from being excessively large due to the excessive torque, the damage of the motor assembly is effectively avoided, and the service life of the screw drilling tool is further prolonged.
The above embodiments are only for those skilled in the art to understand the technical solution of the present invention, and are not limited thereto, and any modification, improvement or equivalent made within the protection scope of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. Overload prevention screw drilling tool, including bypass valve subassembly, motor subassembly, universal joint subassembly and transmission shaft subassembly, these four subassemblies from top to bottom sequential threaded connection becomes screw drilling tool, characterized by:
the overload prevention screw drilling tool further comprises an overload prevention assembly, wherein the overload prevention assembly is connected between the universal joint assembly and the transmission shaft assembly through threads, and the overload prevention assembly can disconnect the motor from the transmission shaft assembly from the inside when the load torque is excessive due to excessive weight on bit;
the overload prevention assembly comprises a shell, an upper short section, a spline short section, a transmission short section, a disc spring group, a spline and a step cover; the upper short section is of a cylindrical structure, the upper end of the upper short section is provided with a connecting thread, the lower part of the upper short section is provided with a section of inner hole, the inner circular surface of the inner hole is provided with a plurality of spline grooves along the circumference of the inner circular surface, and the outer circle of the inner hole is provided with a step through hole which can accommodate the steel ball to enter; the step cover is arranged on the step through hole through a set screw; the spline nipple is of a hollow shaft structure, spline grooves corresponding to the number of the spline grooves on the inner circle surface of the inner hole of the upper nipple are formed in the outer circle surface of the spline nipple along the circumference of the spline nipple, and the lower end face of the spline nipple is of a tooth-shaped structure; the lower end of the transmission nipple is provided with a connecting thread, the upper end face of the transmission nipple is of a toothed structure, and an arc groove capable of accommodating a steel ball is formed in the outer circle of the toothed structure; the disc spring group is provided with an inner hole of the upper nipple, the upper nipple is in sliding connection with the spline nipple through a spline, the lower end of the spline nipple is connected with the transmission nipple, the shell is of a hollow cylinder structure, and the shell is sleeved on a part assembly formed by the upper nipple, the disc spring group, the spline nipple and the transmission nipple.
2. The overload prevention screw drilling tool according to claim 1, wherein: the upper short section is of a cylindrical structure, the upper end of the upper short section is provided with threads connected with universal joint parts inside the universal joint assembly, a section of inner hole is formed in a part of the cylinder at the lower part of the upper short section, 5 spline grooves are formed in the inner circular surface of the inner hole along the circumference of the inner circular surface, a step through hole with a diameter allowing a steel ball to pass through is formed in the position of the outer circular surface, which is a certain distance away from the lower end surface of the upper short section, and a hard alloy sheet is inlaid on the lower end surface of the upper short section.
3. The overload prevention screw drilling tool according to claim 1, wherein: the spline nipple is of a hollow shaft structure, the outer circumferential surface of part of the upper part of the spline nipple is provided with spline grooves corresponding to the number of the spline grooves of the inner hole of the upper nipple along the circumference of the part of the outer circumferential surface, the spline nipple is in sliding connection with the upper nipple through a spline, and the lower end face of the spline nipple is processed into a toothed structure.
4. The overload prevention screw drilling tool according to claim 1, wherein: the transmission nipple is a step shaft part with threads at the lower end and connected with a transmission shaft part in a transmission shaft assembly, the upper end face of the transmission nipple is processed into a toothed structure meshed with the lower end face of the spline nipple, an arc groove for accommodating a steel ball is formed in the outer circle of the toothed structure, and the arc groove corresponds to the step through hole in the upper nipple in position.
5. The overload prevention screw drilling tool according to claim 1, wherein: the shell is of a hollow cylinder structure, a step through hole is formed in the center of the shell, external threads connected with the universal joint assembly shell are formed in the upper end of the shell, and internal threads connected with the transmission shaft assembly shell are formed in the lower end of the shell.
6. The overload-prevention screw drill according to claim 1, 3 or 4, wherein: and hard alloy sheets are inlaid on the lower end face of the toothed structure of the spline nipple and the upper end face of the toothed structure of the transmission nipple.
7. The overload prevention screw drilling tool according to claim 1, wherein: the disc spring group consists of 6 disc springs.
8. The overload prevention screw drilling tool according to claim 1, wherein: the spline is a steel flat key.
9. The overload prevention screw drilling tool according to claim 1, wherein: the step cover is of a step steel column structure, and is installed in the step through hole on the upper short section through a set screw and positioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710899367.5A CN107489381B (en) | 2017-09-28 | 2017-09-28 | Overload-proof screw drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710899367.5A CN107489381B (en) | 2017-09-28 | 2017-09-28 | Overload-proof screw drilling tool |
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| Publication Number | Publication Date |
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| CN107489381A CN107489381A (en) | 2017-12-19 |
| CN107489381B true CN107489381B (en) | 2023-06-06 |
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| CN201710899367.5A Active CN107489381B (en) | 2017-09-28 | 2017-09-28 | Overload-proof screw drilling tool |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113228998B (en) * | 2021-03-29 | 2023-01-06 | 金华市农业科学研究院(浙江省农业机械研究院) | Film rolling device for single greenhouse |
| CN116357221A (en) * | 2023-05-31 | 2023-06-30 | 德州联合石油科技股份有限公司 | Screw drilling tool |
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| CN107489381A (en) | 2017-12-19 |
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