CN216922031U

CN216922031U - PDC drill bit convenient for tooth replacement

Info

Publication number: CN216922031U
Application number: CN202220890981.1U
Authority: CN
Inventors: 陈洋; 朱金南; 何进; 周长清
Original assignee: Better Oilfield Technology Co ltd
Current assignee: Better Oilfield Technology Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-07-08
Anticipated expiration: 2032-04-18

Abstract

The utility model discloses a PDC drill bit convenient for tooth replacement, which comprises a connecting rod, a drill cap and drill teeth, wherein one end of the connecting rod is provided with a connecting thread, a positioning groove is formed in the bottom of the drill cap, the drill teeth are integrally formed in the outer side of the top of the drill cap, a fixing disc is welded and installed on the connecting rod, the top surface of the fixing disc is attached to the bottom surface of the drill cap, a bottom bolt penetrates through the fixing disc in a threaded mode, a locking mechanism is arranged on the side surface of the fixing disc, a horizontal threaded rod penetrates through a side connecting hole and a middle connecting hole, and a positioning nut is installed at the tail end of the horizontal threaded rod. This conveniently trade PDC drill bit of tooth adopts neotype structural design, bores the cap through the detachable, realizes convenient change and the stable installation of different brill teeth, the spare PDC drill bit's that has significantly reduced weight, and when boring the tooth and damaging, only need bore the cap dismantle change can, greatly reduced manufacturing cost, also avoided the wasting of resources.

Description

PDC drill bit convenient for tooth replacement

Technical Field

The utility model relates to the technical field of oil and gas drilling, in particular to a PDC drill bit with convenient tooth replacement.

Background

The PDC drill bit is named as a polycrystalline diamond compact drill bit, is formed by embedding or sintering small cutting blocks made of thin disc-shaped polycrystalline diamond on a drill bit body, is suitable for drilling oil and gas in soft to medium-hard formations, and is generally connected with a drill rod through bottom threads.

Present PDC drill bit is integrated design, the tooth is bored at the top, bore the body and bottom screw portion and be divided into solid integral structure, whole weight is great, when meetting different rocks, need to change the PDC drill bit of different teeth, can only wholly dismantle the PDC drill bit during the change, in order to guarantee the normal clear of probing, a plurality of PDC drill bits that need prepare to have different teeth, a plurality of traditional PDC drill bits weight is heavier, inconvenient carrying, traditional PDC drill bit damages in case of boring the tooth, must whole change, with high costs and extravagant resource.

Therefore, a PDC drill bit convenient for tooth replacement needs to be designed aiming at the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a PDC drill bit convenient for tooth replacement, and aims to solve the problems that the existing PDC drill bit in the background technology is integrated, a top drill tooth, a drill body and a bottom threaded part are of a solid integrated structure, the whole weight is large, the PDC drill bits with different teeth need to be replaced when different rocks are encountered, the PDC drill bits with different teeth can only be integrally disassembled during replacement, a plurality of PDC drill bits with different teeth need to be prepared in order to ensure normal drilling, the traditional PDC drill bits are heavy in weight and inconvenient to carry, and once the drill teeth of the traditional PDC drill bits are damaged, the traditional PDC drill bits need to be integrally replaced, the cost is high, and resources are wasted.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a conveniently trade PDC drill bit of tooth, includes connecting rod, bores the cap and bores the tooth, connecting rod one end is provided with connecting thread, and the connecting thread other end is provided with the location picture peg to location picture peg and the laminating of constant head tank inner wall, the constant head tank is seted up and is being bored cap bottom, and bores the integration in cap top outside and be provided with and bore the tooth, welded mounting has the fixed disk on the connecting rod, and fixed disk top surface and the laminating of boring cap bottom to run through the screw thread on the fixed disk and install the end bolt, end bolt end and bore cap bottom threaded connection simultaneously, the fixed disk side is provided with locking mechanical system, and runs through on the locking mechanical system and install horizontal threaded rod to horizontal threaded rod runs through side connecting hole and well connecting hole, and horizontal threaded rod end installs positioning nut simultaneously.

Preferably, the positioning insertion plate is connected with the positioning groove in a clamping manner, and the upward-looking section shapes of the positioning insertion plate and the positioning groove are all in a cross shape.

Preferably, the bottom bolts are distributed in an equal angle and dense mode relative to the center of the fixed disk, and the length of the bottom bolts is more than 2 times of the thickness of the fixed disk.

Preferably, locking mechanical system includes lockplate and side groove, and lockplate medial surface bottom welded fastening is in the fixed disk side to the laminating of lockplate and side groove inner wall, the side groove is seted up in the cap side bottom of boring simultaneously, it installs horizontal threaded rod to run through on the lockplate.

Preferably, the locking plate is connected with the side groove in a sliding mode, the bottom sections of the locking plate and the side groove are both arc-shaped, and the locking plate is symmetrically distributed around the fixed plate.

Preferably, the horizontal threaded rod is in threaded connection with the side connecting hole and the middle connecting hole, the side connecting hole penetrates through the side wall of the bottom of the drill cap, and the middle connecting hole penetrates through the middle of the positioning plug board.

Compared with the prior art, the utility model has the beneficial effects that: the PDC drill bit convenient for tooth replacement adopts a novel structural design, and the convenient replacement and stable installation of different drill teeth are realized through the detachable drill cap, so that the weight of a standby PDC drill bit is greatly reduced, and when the drill teeth are damaged, the drill cap is only needed to be detached and replaced, so that the production cost is greatly reduced, and the resource waste is also avoided;

1. through the split design of the connecting rod and the drill cap, when the drill teeth are damaged or the drill teeth need to be replaced when meeting different rock stratum conditions, the drill teeth can be conveniently and stably detached and installed, so that a plurality of connecting rods with heavier weight do not need to be prepared, and only the drill cap needs to be replaced when the drill teeth are damaged, and the cost is greatly reduced;

2. through the mutual cooperation work of the positioning insertion plate, the positioning groove, the fixing disc, the bottom bolt, the locking mechanism, the horizontal threaded rod, the side connecting hole, the middle connecting hole and the positioning nut, the connecting rod and the drill cap can be stably connected and fixed, and the stable use of the drill cap and the drill teeth is ensured.

Drawings

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

FIG. 2 is a schematic front sectional view of the present invention;

FIG. 3 is a schematic bottom sectional view of the positioning board and the locking mechanism of the present invention;

FIG. 4 is a bottom view of the mounting plate and locking mechanism of the present invention.

In the figure: 1. a connecting rod; 2. connecting threads; 3. positioning the plug board; 4. positioning a groove; 5. drilling a cap; 6. drilling teeth; 7. fixing the disc; 8. a bottom bolt; 9. a locking mechanism; 901. a locking plate; 902. a side groove; 10. a horizontal threaded rod; 11. a side connection hole; 12. a middle connecting hole; 13. and (5) positioning a nut.

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.

Referring to fig. 1-4, the present invention provides a technical solution: a PDC drill bit convenient for tooth replacement comprises a connecting rod 1, a connecting thread 2, a positioning insertion plate 3, a positioning groove 4, a drill cap 5, drill teeth 6, a fixed plate 7, a bottom bolt 8, a locking mechanism 9, a locking plate 901, a side groove 902, a horizontal threaded rod 10, a side connecting hole 11, a middle connecting hole 12 and a positioning nut 13, wherein the connecting thread 2 is arranged at the bottom end of the connecting rod 1, the positioning insertion plate 3 is arranged at the top end of the connecting thread 2, the positioning insertion plate 3 is connected with the positioning groove 4 in a clamping manner, the upward cross-sectional shapes of the positioning insertion plate 3 and the positioning groove 4 are all in a cross shape, the positioning insertion plate 3 and the positioning groove 4 can be connected in a quick alignment manner through the structural design, and the connecting rod 1 and the drill cap 5 can be installed in a quick alignment manner;

the positioning groove 4 is formed in the center of the bottom surface of the drill cap 5, the drill teeth 6 are arranged at the top of the drill cap 5, the fixing disc 7 is horizontally arranged on the connecting rod 1, the top surface of the fixing disc 7 is attached to the bottom surface of the drill cap 5, the fixing disc 7 is provided with the bottom bolt 8 in a penetrating mode through threads, meanwhile, the tail end of the bottom bolt 8 is connected with a threaded hole formed in the bottom of the drill cap 5, the bottom bolts 8 are distributed in an equal-angle and intensive mode relative to the center of the fixing disc 7, the length of the bottom bolt 8 is larger than 2 times of the thickness of the fixing disc 7, the fixing disc 7 can be stably connected with the bottom of the drill cap 5 through the structural design, and the positions of the connecting rod 1 and the locking plate 901 are stably fixed;

a locking mechanism 9 is arranged on the side surface of the fixed disk 7, the locking mechanism 9 comprises a locking plate 901 and a side groove 902, the bottom end of the inner side surface of the locking plate 901 is fixed on the side surface of the fixed disk 7 by welding, the locking plate 901 is attached to the inner wall of the side groove 902, the side groove 902 is arranged at the bottom of the side surface of the drill cap 5, the horizontal threaded rod 10 is arranged on the locking plate 901 in a penetrating way, the structural design can enhance the connection strength between the drill cap 5 and the connecting rod 1, ensure the stability of the drill cap 5 in use, the locking plate 901 and the side groove 902 are in sliding connection, the bottom sections of the locking plate 901 and the side groove 902 are both arc-shaped, the locking plates 901 are symmetrically distributed relative to the fixed plate 7, and the structural design is matched with the positioning insertion plate 3 and the positioning groove 4, so that the connecting rod 1 can be quickly and stably aligned and connected with the drill cap 5, the drill cap 5 is limited in the horizontal direction, and the stability of the drill cap 5 is further improved;

locking mechanical system 9 top is run through and is installed horizontal threaded rod 10, and horizontal threaded rod 10 runs through side connecting hole 11 and well connecting hole 12, and horizontal threaded rod 10 end-to-end installation has positioning nut 13, horizontal threaded rod 10 and side connecting hole 11 and well connecting hole 12 are threaded connection, and side connecting hole 11 runs through and sets up on the lateral wall of boring cap 5 bottom, and well connecting hole 12 runs through and sets up in 3 middle parts of location picture peg, lockplate 901 can be strengthened to foretell structural design, connecting rod 1 and the relation of being connected of boring cap 5, guarantee the PDC drill bit when using, boring cap 5 can not carry out relative motion with connecting rod 1.

The working principle is as follows: when the device is used, the connecting rod 1 and the drill cap 5 are directly arranged at the tail end of the drill rod through the connecting thread 2, and the drill rod drives the connecting rod 1, the drill cap 5 and the drill teeth 6 to perform stable rotary drilling;

when the drill teeth 6 are damaged or meet different rock stratums, firstly, all the bottom bolts 8 in the figures 2 and 4 are disassembled from the bottoms of the drill caps 5 and the fixed disks 7, then the positioning screw caps 13 are disassembled from the tail ends of the horizontal threaded rods 10, the horizontal threaded rods 10 are rotated to enable the horizontal threaded rods 10 to be screwed out from the side connecting holes 11 and the middle connecting holes 12, the old drill caps 5 are lifted upwards, and the old drill caps 5 carry the positioning grooves 4 to be separated from the positioning insertion plates 3;

then a new drill cap 5 with different drill teeth 6 is taken out, the positioning groove 4 at the bottom of the drill cap 5 is aligned with the positioning insertion plate 3, the drill cap 5 is vertically put down, the positioning insertion plate 3 slides into the positioning groove 4, the bottom surface of the drill cap 5 is tightly attached to the top surface of the fixed disc 7, after the positioning groove 4 is aligned and combined with the positioning insertion plate 3, the side connecting hole 11 is aligned with the middle connecting hole 12, the horizontal threaded rod 10 is inserted into the side connecting hole 11 and the middle connecting hole 12, the positioning nut 13 is installed at the tail end of the horizontal threaded rod 10, then the bottom bolts 8 are sequentially installed on the fixed disc 7 to reset, the connecting rod 1 is stably connected with the drill cap 5, and the connecting rod 1, the drill cap 5 and the drill teeth 6 can continue normal drilling, which is the working principle of the PDC drill bit convenient for tooth replacement.

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

Claims

1. The utility model provides a conveniently trade PDC drill bit of tooth, includes connecting rod (1), bores cap (5) and bores tooth (6), its characterized in that: connecting rod (1) one end is provided with connecting thread (2), and the connecting thread (2) other end is provided with location picture peg (3) to location picture peg (3) and the laminating of constant head tank (4) inner wall, constant head tank (4) are seted up and are being bored cap (5) bottom, and are bored cap (5) top outside integration and be provided with and bore tooth (6), welded mounting has fixed disk (7) on connecting rod (1), and fixed disk (7) top surface and the laminating of boring cap (5) bottom surface, and run through the screw thread on fixed disk (7) and install bottom bolt (8), bottom bolt (8) end and boring cap (5) bottom threaded connection simultaneously, fixed disk (7) side is provided with locking mechanical system (9), and runs through on locking mechanical system (9) and install horizontal threaded rod (10) to horizontal threaded rod (10) run through side connecting hole (11) and well connecting hole (12), and a positioning nut (13) is arranged at the tail end of the horizontal threaded rod (10).

2. The PDC drill bit facilitating tooth replacement of claim 1, wherein: the positioning insertion plate (3) is connected with the positioning groove (4) in a clamping manner, and the upward-looking section shapes of the positioning insertion plate (3) and the positioning groove (4) are all in a cross shape.

3. The PDC drill bit facilitating tooth replacement of claim 1, wherein: the bottom bolts (8) are densely distributed in the center of the fixed disc (7) at equal angles, and the length of the bottom bolts (8) is 2 times larger than the thickness of the fixed disc (7).

4. The PDC drill bit facilitating tooth replacement of claim 1, wherein: locking mechanical system (9) are including lockplate (901) and side groove (902), and lockplate (901) medial surface bottom welded fastening is in fixed disk (7) side to lockplate (901) and side groove (902) inner wall laminating, side groove (902) are seted up simultaneously and are being bored and establish in cap (5) side bottom, run through on lockplate (901) and install horizontal threaded rod (10).

5. The PDC drill bit facilitating tooth replacement of claim 4, wherein: the locking plate (901) is in sliding connection with the side groove (902), the sections of the locking plate (901) and the side groove (902) in a vertical view are arc-shaped, and the locking plate (901) is symmetrically distributed relative to the fixed disc (7).

6. The PDC drill bit facilitating tooth replacement of claim 1, wherein: horizontal threaded rod (10) and side connecting hole (11) and well connecting hole (12) are threaded connection, and run through on boring cap (5) bottom lateral wall side connecting hole (11) to well connecting hole (12) run through and set up in location picture peg (3) middle part.