CN112112556A

CN112112556A - Screw drill for oil field drilling operation

Info

Publication number: CN112112556A
Application number: CN202011311327.2A
Authority: CN
Inventors: 郭宝昌; 王文臣
Original assignee: Dongying Able Petroleum Technology Co ltd
Current assignee: Dongying qianrun Petroleum Engineering Technology Service Co.,Ltd.
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2020-12-22
Anticipated expiration: 2040-11-20
Also published as: CN112112556B

Abstract

The invention provides a screw drill for oilfield drilling operation, and relates to the field of drilling tools. The screw drilling tool for the oil field drilling operation comprises a bypass valve assembly, wherein a motor shell is fixedly connected to the right end of the bypass valve assembly through a connecting piece, a connecting shaft shell is fixedly connected to the right end of a transmission shaft through a connecting piece, and a drill bit assembly is arranged at the right end of the connecting shaft shell. Promote the drill bit connecting axle upward movement through the drill bit, then the drill bit connecting axle will stop the piece and promote, it makes the piece bottom part of stopping tighten up to the inboard to stop the piece to rotate along the collar, until pressing from both sides the drill bit connecting axle tightly, the drill bit connecting axle is pressed from both sides tightly the back, the drill bit begins work, the drill bit rotates and drives the slider and slide in the spout, can make the drill bit have a buffering process when drilling down and work, reduce the collision of drill bit assembly and hard thing, the life of extension drill bit, and guarantee the life of double-screw bolt drilling tool through the rubber stator of convenient change, be worth wideling popularize.

Description

Screw drill for oil field drilling operation

Technical Field

The invention relates to the technical field of drilling tools, in particular to a screw drill for oilfield drilling operation.

Background

The screw drill is a progressive cavity type positive displacement hole bottom power machine, it uses mud and clean water as power medium, and utilizes the screw drill which can be used for transferring fluid pressure energy into mechanical energy, and when drilling, the screw drill can directly drive core tube and drill bit connected on the hole bottom transmission shaft to make rotation, and the whole drill string only can be used as channel for transferring high-pressure working medium and rod member for supporting counter-torque of drill bit, and does not make rotation movement.

The stator of the screw drilling tool is made of rubber, but in the drilling process, the temperature of slurry is high, so that the service life of the stator made of the rubber is shortened, the service life of a motor is influenced, and the drill bit is in the process of drilling and working, so that the drill bit is abraded due to instant collision, and the service life of the drill bit is influenced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a screw drill for oilfield drilling operation, which solves the problem that the service lives of a motor and a drill bit are damaged.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a screw drilling tool for oil field drilling operation, includes the bypass valve assembly, the bypass valve assembly right-hand member passes through connecting piece fixedly connected with motor housing, the motor housing right-hand member passes through connecting piece fixedly connected with cardan shaft assembly, the cardan shaft assembly right-hand member passes through connecting piece fixedly connected with transmission shaft assembly, the transmission shaft right-hand member passes through connecting piece fixedly connected with connecting axle shell, connecting axle shell right-hand member is provided with the drill bit assembly.

Preferably, the inside stator mounting bracket that is provided with of motor housing, the stator mounting bracket inboard evenly is provided with three mounting groove, the inboard sliding connection of mounting groove has the installation piece, the even fixed connection of installation piece is in the stator mount outside, stator mount inboard is provided with rubber stator.

Preferably, a fixing piece is arranged at one end, close to the bypass valve assembly, of the stator fixing frame, and the fixing piece is fixedly connected with the stator mounting frame through a fixing bolt.

Preferably, the connecting shaft shell is internally provided with a buffer shell, the buffer shell is internally provided with a fixed shell, the fixed shell is internally provided with a drill connecting shaft, and the top of the fixed shell is provided with a cavity.

Preferably, both ends are provided with the installation ear around the cavity is inboard, the inboard fixedly connected with fixed connection block of installation ear, fixed connection block rotates both ends around the collar of connection, the collar left and right sides all rotates and is connected with five pieces of stopping.

Preferably, the inner side of the fixed shell is provided with a limiting groove, and two ends of the drill connecting shaft are provided with limiting blocks and the limiting blocks are connected with the limiting groove in a sliding mode.

Preferably, the inboard three spout that evenly is provided with of buffering casing, the fixed casing outside evenly is provided with three slider and spout sliding connection, the inside both sides of spout all are provided with damping device and damping device one end fixed connection in the inboard opposite side fixed connection of spout in the slider both sides.

The working principle is as follows: the temperature in a working well is determined before drilling, a proper rubber stator is selected according to the temperature, the rubber stator is fixed on a stator fixing frame, an installation block is installed on a stator installation frame along an installation groove, the stator fixing frame is fixedly installed inside the stator installation frame through a fixing piece and a fixing bolt, after the rubber stator is installed, the whole stud drilling tool is assembled and then a drill is drilled, after the drill reaches the bottom, the drill pushes a drill connecting shaft to move upwards, the drill connecting shaft moves upwards all the time and is contacted with a brake sheet, then the drill connecting shaft pushes the brake sheet, the bottom end part of the brake sheet is tightened inwards by the rotation of the brake sheet along an installation ring until the brake sheet is contacted with the drill connecting shaft to clamp the drill connecting shaft, after the drill connecting shaft is clamped, the drill starts working, the drill rotates to drive a sliding block to slide in a sliding groove, and the sliding block enables the drill, the drill bit continues to rotate to begin drilling the well.

The invention provides a screw drill for oilfield drilling operation. The method has the following beneficial effects:

1. according to the invention, after the drill bit reaches the bottom, the drill bit pushes the drill bit connecting shaft to move upwards, the drill bit connecting shaft moves upwards all the time to be contacted with the brake sheet, then the drill bit connecting shaft pushes the brake sheet, the brake sheet rotates along the mounting ring to enable the bottom end part of the brake sheet to be tightened inwards until the brake sheet is contacted with the drill bit connecting shaft to clamp the drill bit connecting shaft, the drill bit starts to work after the drill bit connecting shaft is clamped, the drill bit rotates to drive the sliding block to slide in the sliding groove, the sliding block enables the drill bit to have a buffer process in the rotating process under the action of the damping device, the buffer process can be realized when the drill bit is drilled and works, the abrasion of the drill bit caused by short-time collision during.

2. According to the invention, a proper rubber stator is selected by measuring the temperature in the oil well in advance, the rubber stator is fixed on the stator fixing frame, the mounting block is mounted on the stator mounting frame along the mounting groove, and the stator fixing frame is fixedly mounted in the stator mounting frame through the fixing piece and the fixing bolt.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic view of a rubber stator of the present invention;

FIG. 3 is a schematic view of a fastener of the present invention;

FIG. 4 is a schematic view of a mount of the present invention;

FIG. 5 is a schematic view of a brake pad of the present invention;

fig. 6 is an enlarged view of a portion a in fig. 5.

Wherein, 1, a bypass valve assembly; 2. a connecting member; 3. a motor housing; 4. a cardan shaft assembly; 5. a drive shaft assembly; 6. a connecting shaft housing; 7. a drill bit assembly; 8. a stator mounting bracket; 9. mounting grooves; 10. mounting blocks; 11. a rubber stator; 12. a stator fixing frame; 13. a fixing member; 14. fixing the bolt; 15. a limiting block; 16. a limiting groove; 17. a buffer housing; 18. a chamber; 19. a stationary housing; 20. a drill bit connecting shaft; 21. a brake sheet; 22. fixing a connecting block; 23. a mounting ring; 24. mounting lugs; 25. a slider; 26. a chute; 27. a damping device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1-6, the embodiment of the present invention provides a screw drilling tool for oilfield drilling operations, comprising a bypass valve assembly 1, wherein the right end of the bypass valve assembly 1 is fixedly connected with a motor housing 3 through a connecting member 2, the right end of the motor housing 3 is fixedly connected with a universal shaft assembly 4 through the connecting member 2, the right end of the universal shaft assembly 4 is fixedly connected with a transmission shaft assembly 5 through the connecting member 2, the right end of the transmission shaft assembly 5 is fixedly connected with a connecting shaft housing 6 through the connecting member 2, and the right end of the connecting shaft housing 6 is provided with a drill bit assembly 7, in the above structure, the bypass valve assembly 1 is used for preventing the phenomenon that when drilling or single joint is connected, the liquid flows back into the drilling tool due to the high density of the annular space liquid, the rotor turns back and is loosened, the drilling tool is prevented from entering a stator cavity to block the drilling tool, the accidental blowout, the motor shell 3 is used for protecting an internal motor assembly and ensuring the normal work of the motor assembly, the universal shaft assembly 4 is used for converting the eccentric motion of the motor into the fixed shaft rotation of the transmission shaft and transmitting the torque to the transmission shaft so as to achieve the aim of drilling, the transmission shaft assembly 5 is used for transmitting the rotation torque of the motor to a drill bit and bearing the axial and radial loads generated by the drill pressure, the connecting shaft shell 6 is used for protecting an internal structure, the drill bit assembly 7 is a main part of a working part which is used for performing the drilling work on an oil well, and the connecting piece 2 is used for connecting the bypass valve assembly 1, the motor shell 3, the universal shaft assembly 4, the transmission shaft assembly 5 and the connecting shaft shell 6.

Inside stator mounting bracket 8 that is provided with of

motor housing

3, 8 inboard three mounting grooves 9 that evenly are provided with of stator mounting bracket, 9 inboard sliding connection of mounting groove has installation piece 10, the even fixed connection of installation piece 10 is in the 12 outsides of stator mount, 12 inboard rubber stator 11 that is provided with of stator mount, the suitable rubber stator 11 of temperature selection in the survey oil well in advance, fix rubber stator 11 on stator mount 12, then install installation piece 10 on stator mounting bracket 8 along mounting groove 9, formulate special rubber stator 11 according to the existing situation, can increase the life of motor.

One end of the stator fixing frame 12 close to the bypass valve assembly 1 is provided with a fixing piece 13, the fixing piece 13 is fixedly connected with the stator mounting frame 8 through a fixing bolt 14, and the stator fixing frame 12 is fixedly mounted inside the stator mounting frame 8 through the fixing piece 13 and the fixing bolt 14.

The connecting shaft shell 6 is internally provided with a buffer shell 17, the buffer shell 17 is internally provided with a fixed shell 19, the fixed shell 19 is internally provided with a drill bit connecting shaft 20, the top of the fixed shell 19 is provided with a cavity 18, the buffer shell 17, the fixed shell 19 and the cavity 18 provide an installation space for an internal structure, and the drill bit connecting shaft 20 is connected with the drill bit assembly 7 and transmits kinetic energy for the drill bit assembly 7.

The front end and the rear end of the inner side of the cavity 18 are provided with mounting lugs 24, the inner side of the mounting lugs 24 is fixedly connected with a fixed connecting block 22, the fixed connecting block 22 is rotatably connected with the front end and the rear end of a mounting ring 23, the left side and the right side of the mounting ring 23 are respectively and rotatably connected with five brake sheets 21, the mounting ring 23 is mounted on the inner side of the fixed connecting block 22, the fixed connecting block 22 is mounted on the inner side of the cavity 18 through the mounting lugs 24, the brake sheets 21 are rotatably connected with the mounting ring 23 for a circle, after the drill bit assembly 7 reaches the bottom, the drill bit assembly 7 pushes a drill bit connecting shaft 20 to move upwards, the drill bit connecting shaft 20 moves upwards all the time to be contacted with the brake sheets 21, then the drill bit connecting shaft 20 pushes the brake sheets 21, the brake sheets 21 rotate along the mounting ring 23 to enable the bottom end part of, reducing damage to the drill bit assembly 7.

The limiting groove 16 is formed in the inner side of the fixed shell 19, the limiting blocks 15 are arranged at two ends of the drill connecting shaft 20, the limiting blocks 15 are connected with the limiting groove 16 in a sliding mode, the stopping sheet 21 completely blocks the upward movement of the drill connecting shaft 20 after the drill connecting shaft 20 moves upwards to the maximum position, the limiting blocks 15 reach the top end of the limiting groove 16, and it can be guaranteed that the mounting ring 23 cannot be damaged due to instant collision.

Buffer housing 17 inboard evenly is provided with three spout 26, fixed housing 19 outside evenly is provided with three slider 25 and spout 26 sliding connection, the inside both sides of spout 26 all are provided with damping device 27 and damping device 27 one end fixed connection in the inboard opposite side fixed connection of spout 26 in slider 25 both sides, drill bit assembly 7 begins working, drill bit assembly 7 rotates and drives slider 25 and slide in spout 26, slider 25 makes drill bit assembly 7 possess one section cushioning process at the pivoted in-process under damping device 27's effect, can make drill bit assembly 7 have a cushioning process in work, it causes wearing and tearing because of instantaneous collision to reduce drill bit assembly 7 at the during operation, the life of extension drill bit assembly 7.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A helical-lobe drilling tool for oil field drilling operation, includes bypass valve assembly (1), its characterized in that: bypass valve assembly (1) right-hand member passes through connecting piece (2) fixedly connected with motor housing (3), motor housing (3) right-hand member passes through connecting piece (2) fixedly connected with cardan shaft assembly (4), cardan shaft assembly (4) right-hand member passes through connecting piece (2) fixedly connected with transmission shaft assembly (5), transmission shaft assembly (5) right-hand member passes through connecting piece (2) fixedly connected with connecting axle housing (6), connecting axle housing (6) right-hand member is provided with drill bit assembly (7).

2. The progressive cavity drill for use in oilfield drilling operations of claim 1, wherein: the motor is characterized in that a stator mounting frame (8) is arranged inside the motor shell (3), three mounting grooves (9) are evenly formed in the inner side of the stator mounting frame (8), mounting blocks (10) are slidably connected to the inner side of the mounting grooves (9), the mounting blocks (10) are evenly fixedly connected to the outer side of a stator fixing frame (12), and rubber stators (11) are arranged on the inner side of the stator fixing frame (12).

3. The progressive cavity drill for use in oilfield drilling operations of claim 2, wherein: one end, close to the bypass valve assembly (1), of the stator fixing frame (12) is provided with a fixing piece (13), and the fixing piece (13) is fixedly connected with the stator mounting frame (8) through a fixing bolt (14).

4. The progressive cavity drill for use in oilfield drilling operations of claim 1, wherein: the drill bit connecting shaft is characterized in that a buffer shell (17) is arranged inside the connecting shaft shell (6), a fixed shell (19) is arranged inside the buffer shell (17), a drill bit connecting shaft (20) is arranged inside the fixed shell (19), and a cavity (18) is arranged at the top of the fixed shell (19).

5. The progressive cavity drill for use in oilfield drilling operations of claim 4, wherein: both ends are provided with installation ear (24) around cavity (18) is inboard, installation ear (24) inboard fixedly connected with fixed connection block (22), fixed connection block (22) rotate to be connected both ends around collar (23), collar (23) left and right sides all rotates and is connected with five pieces (21) of stopping.

6. The progressive cavity drill for use in oilfield drilling operations of claim 4, wherein: the drill bit connecting shaft is characterized in that a limiting groove (16) is formed in the inner side of the fixed shell (19), and limiting blocks (15) are arranged at two ends of the drill bit connecting shaft (20) and are in sliding connection with the limiting groove (16).

7. The progressive cavity drill for use in oilfield drilling operations of claim 6, wherein: buffer housing (17) inboard evenly is provided with three spout (26), fixed casing (19) outside evenly is provided with three slider (25) and spout (26) sliding connection, the inside both sides of spout (26) all are provided with damping device (27) and damping device (27) one end fixed connection in spout (26) inboard opposite side fixed connection in slider (25) both sides.