CN212508092U

CN212508092U - PDC drill bit for drilling hard formation

Info

Publication number: CN212508092U
Application number: CN202020755383.4U
Authority: CN
Inventors: 纪世平
Original assignee: Chengdu Jitao Machinery Equipment Co ltd
Current assignee: Chengdu Jitao Machinery Equipment Co ltd
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2021-02-09
Anticipated expiration: 2030-05-09

Abstract

The utility model relates to the technical field of oil and gas drilling engineering, mine engineering, geological drilling, tunnel engineering, etc., in particular to a PDC drill bit for drilling hard stratum, which comprises a PDC drill bit body and a connecting plate, wherein the right end face of the PDC drill bit body is fixedly connected with blades, the outer sides of the blades are fixedly connected with PDC cutting teeth, and the PDC drill bit can better adapt to the drilling work of soft stratum and can obtain higher drilling speed in hard stratum through the blades, the PDC cutting teeth, the filling blocks and the grooves which are arranged on the PDC drill bit body when in use, when the PDC drill bit drills in the hard stratum, the filling blocks can form ridges after being worn, the lateral contact surface between the PDC cutting teeth and rock at the bottom of the well is increased, the transverse vibration is weakened, and when the PDC drill bit is worn, the PDC drill bit still has higher drilling specific pressure, has strong continuous and efficient drilling capability.

Description

PDC drill bit for drilling hard formation

Technical Field

The utility model relates to a technical field such as oil and gas probing engineering, mine engineering, geological drilling, tunnel engineering specifically are a hard stratum creeps into and uses PDC drill bit.

Background

The PDC drill bit generally refers to polycrystalline diamond compact bit, the PDC drill bit is far less costly than natural diamond drill bit, the PDC drill bit divide into the PDC drill bit for geological exploration, the coal field bores and adopts PDC drill bit and the PDC drill bit for oil exploration, the PDC drill bit breaks the rock through PDC cutting teeth cutting rock, in soft to well hard stratum, can obtain the drilling rate of ideal, obtained extensive application in oil gas drilling, but some problems exist when using in some present PDC drill bits.

Some defects exist when some present PDC drill bits are used, some present PDC drill bits creep into in the difficult stratum of deep boring, often can not obtain higher mechanical drilling rate, wherein one of the most important reasons is limited by the invasion ability of PDC cutting tooth, especially after the drill bit takes place to wear out, the contact specific pressure of PDC cutting tooth and rock drops sharply, it is very low to creep into efficiency, can consequently cause the tripping even, need change the PDC drill bit when PDC drill bit wearing and tearing are serious simultaneously, but some present PDC drill bits are inconvenient to be changed when using, need use dedicated instrument when changing the PDC drill bit, the change process is troublesome, waste time and energy.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hard formation is bored and is used PDC drill bit to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a hard formation is bored and is used PDC drill bit, includes PDC drill bit body and connecting plate, PDC drill bit body right-hand member face fixedly connected with wing, the wing outside fixedly connected with PDC cutting teeth, PDC drill bit body outside sliding connection has the fixed plate, PDC drill bit body inboard is equipped with first extension spring, connecting plate and PDC drill bit body sliding connection, connecting plate outside fixedly connected with locating piece.

Preferably, a groove is formed in the PDC cutting tooth, a filling block is arranged in the groove, the filling block is fixedly connected with the PDC cutting tooth, and the PDC cutting tooth is made of a plate made of a polycrystalline diamond composite material.

Preferably, a second extension spring is arranged on the inner side of the fixing plate and fixedly connected with the fixing plate, a supporting plate is fixedly connected to the other end of the second extension spring and penetrates through the fixing plate, the supporting plate is slidably connected with the fixing plate, and a pressing plate is fixedly connected to the outer side of the supporting plate.

Preferably, the first extension spring is fixedly connected with the PDC drill bit body, and the other end of the first extension spring is fixedly connected with the connecting plate.

Preferably, the locating piece runs through the PDC drill bit body, locating piece and PDC drill bit body sliding connection, the locating piece runs through the fixed plate, locating piece and fixed plate sliding connection, and the left end face of locating piece is the slope setting.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses in, through the wing that sets up, PDC cutting tooth, packing block and recess, through the wing that sets up on the PDC drill bit body, PDC cutting tooth, packing block and recess when using, this PDC drill bit can not only adapt to the drilling work in soft stratum better, also can obtain higher drilling rate in hard stratum, when the PDC drill bit creeps into in hard stratum, can form the back at the shaft bottom after the packing block wearing and tearing, the side direction contact surface of PDC cutting tooth and shaft bottom rock has been increased, weaken horizontal vibrations, when the PDC drill bit takes place to wear, still have higher drilling specific pressure, have very strong continuation, high-efficient drilling ability;

2. the utility model discloses in, through the first extension spring who sets up, connecting plate, locating piece and clamp plate, when PDC drill bit wearing and tearing seriously need change the PDC drill bit, through pressing down the clamp plate on the fixed plate, the clamp plate can push the drive locating piece motion to the locating piece, when the locating piece leaves the fixed plate and does not contact with the fixed plate, just can dismantle the PDC drill bit from the fixed plate, and is very convenient to the dismantlement of PDC drill bit, need not use professional instrument, labour saving and time saving.

Drawings

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

FIG. 2 is a schematic view of the mounting structure of the PDC cutting teeth of the present invention;

fig. 3 is a schematic view of the installation structure of the filling block of the present invention.

In the figure: 1-PDC drill bit body, 2-blades, 3-PDC cutting teeth, 4-filling blocks, 5-grooves, 6-fixing plates, 7-first extension springs, 8-connecting plates, 9-positioning blocks, 10-second extension springs, 11-pressing plates and 12-supporting plates.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution:

the utility model provides a hard formation is bored and is used PDC drill bit, including PDC drill bit body 1 and connecting plate 8, 1 right-hand member face fixedly connected with wing 2 of PDC drill bit body, 2 outside fixedly connected with PDC cutting teeth 3 of wing, this kind of setting is favorable to cutting the rock, 1 outside sliding connection of PDC drill bit body has fixed plate 6, 1 inboard of PDC drill bit body is equipped with first extension spring 7, this kind of setting is favorable to driving locating piece 9 and resets, connecting plate 8 and 1 sliding connection of PDC drill bit body, 8 outside fixedly connected with locating piece 9 of connecting plate.

The PDC cutting teeth 3 are internally provided with grooves 5, the grooves 5 are internally provided with filling blocks 4, the filling blocks 4 are fixedly connected with the PDC cutting teeth 3, and the PDC cutting teeth 3 are made of plates made of polycrystalline diamond composite materials, so that the arrangement is favorable for the PDC drill bit to adapt to soft stratum drilling and hard stratum drilling; a second extension spring 10 is arranged on the inner side of the fixing plate 6, the second extension spring 10 is fixedly connected with the fixing plate 6, the other end of the second extension spring 10 is fixedly connected with a supporting plate 12, the supporting plate 12 penetrates through the fixing plate 6, the supporting plate 12 is slidably connected with the fixing plate 6, and a pressing plate 11 is fixedly connected to the outer side of the supporting plate 12, so that the PDC drill bit can be conveniently disassembled; the first extension spring 7 is fixedly connected with the PDC drill bit body 1, and the other end of the first extension spring 7 is fixedly connected with the connecting plate 8, so that the positioning block 9 can be reset; locating piece 9 runs through PDC drill bit body 1, and locating piece 9 and PDC drill bit body 1 sliding connection, locating piece 9 run through fixed plate 6, and locating

piece

9 and 6 sliding connection of fixed plate, and the left end face of locating piece 9 is the slope setting, and this kind of setting is favorable to conveniently installing the PDC drill bit.

The working process is as follows: the PDC drill bit body 1 is provided with the PDC cutting teeth 3 with the grooves 5, the filling blocks 4 with the wear resistance lower than that of the diamond layer are arranged in the grooves 5, when the PDC drill bit body drills in a soft stratum, the filling blocks 4 and the PDC cutting teeth 3 participate in rock cutting together, so that high drilling speed can be obtained, when the PDC drill bit body drills in a hard stratum, the wear resistance of the filling blocks 4 is relatively weak, so that the wear speed of the filling blocks 4 is higher than that of the diamond layer, the filling blocks 4 are gradually worn, the grooves 5 are formed in the PDC cutting teeth 3 again, the grooves 5 are formed, the cutting edges of the PDC cutting teeth 3 have high drilling specific pressure, the penetration capacity can be ensured, large ridges can be formed, after the ridges are formed, the ridges are subjected to large stress, and lack of supporting rock masses on two sides, the ridges are easy to damage, and further contribute to the improvement of the drilling speed, the PDC drill bit can adapt to soft stratum drilling and hard stratum drilling, still has higher drilling specific pressure when the PDC drill bit is worn, has strong continuous and efficient drilling capacity, can be detached from the fixed plate 6 by pressing the pressing plate 11 on the fixed plate 6 when the PDC drill bit is seriously worn and needs to be replaced, does not need to use a professional tool, saves time and labor, can extrude the positioning block 9 to drive the positioning block 9 to move when the positioning block 9 leaves the fixed plate 6 and does not contact with the fixed plate 6, aims the PDC drill bit body 1 at a chute on the fixed plate 6 and then pushes the PDC drill bit body 1 when the PDC drill bit body 1 slides in the fixed plate 6, extrudes the positioning block 9 on the PDC drill bit body 1 by the fixed plate 6 to drive the positioning block 9 to move, locating piece 9 compresses first extension spring 7 through connecting plate 8 in the motion, and when locating piece 9 contacted the hole on fixed plate 6, the pressure that first extension spring 7 received disappeared, and first extension spring 7 can drive locating piece 9 through connecting plate 8 and reset, lets locating piece 9 support fixed plate 6 to can install PDC drill bit body 1, it is also very convenient to the installation of PDC drill bit.

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. The utility model provides a hard formation is bored and is used PDC drill bit, includes PDC drill bit body (1) and connecting plate (8), its characterized in that: the PDC drill bit comprises a PDC drill bit body (1), a right end face fixedly connected with blade (2), a PDC cutting tooth (3) fixedly connected with the outer side of the blade (2), a fixing plate (6) slidably connected with the outer side of the PDC drill bit body (1), a first extension spring (7) is arranged on the inner side of the PDC drill bit body (1), a connecting plate (8) is slidably connected with the PDC drill bit body (1), and a positioning block (9) is fixedly connected with the outer side of the connecting plate (8).

2. The PDC bit for drilling into a hard formation of claim 1, wherein: set up recess (5) in PDC cutting tooth (3), be equipped with filling block (4) in recess (5), filling block (4) and PDC cutting tooth (3) fixed connection, and PDC cutting tooth (3) are made by the panel of polycrystalline diamond composite material.

3. The PDC bit for drilling into a hard formation of claim 1, wherein: the utility model discloses a fixing plate, including fixed plate (6), fixed plate (6) inboard is equipped with second extension spring (10), second extension spring (10) and fixed plate (6) fixed connection, the other end fixedly connected with backup pad (12) of second extension spring (10), fixed plate (6) are run through in backup pad (12), backup pad (12) and fixed plate (6) sliding connection, backup pad (12) outside fixedly connected with clamp plate (11).

4. The PDC bit for drilling into a hard formation of claim 1, wherein: the PDC drill bit is characterized in that the first extension spring (7) is fixedly connected with the PDC drill bit body (1), and the other end of the first extension spring (7) is fixedly connected with the connecting plate (8).

5. The PDC bit for drilling into a hard formation of claim 1, wherein: locating piece (9) run through PDC drill bit body (1), locating piece (9) and PDC drill bit body (1) sliding connection, locating piece (9) run through fixed plate (6), locating piece (9) and fixed plate (6) sliding connection, and the left end face of locating piece (9) is the slope setting.