CN204532080U

CN204532080U - Torsion impact device five wing PDC drill bits

Info

Publication number: CN204532080U
Application number: CN201520190659.8U
Authority: CN
Inventors: 乔勇; 何选蓬; 王树超; 雨松
Original assignee: CNPC Bohai Drilling Engineering Co Ltd
Current assignee: CNPC Bohai Drilling Engineering Co Ltd
Priority date: 2015-03-31
Filing date: 2015-03-31
Publication date: 2015-08-05
Anticipated expiration: 2025-03-31

Abstract

A kind of torsion impact device five wing PDC drill bits, the drill bit hat of bit body front end is circumferentially provided with wing, and rear end is connecting thread, wing bottom is gauge, and gauge is provided with gauge teeth, and wing is provided with cutting teeth, be chip area between adjacent blades, in chip area, water nozzle be installed; Wing is three operator wings and two secondary wings, and two secondary wings are arranged between two operator wings respectively, and two angles of operating between the wings that centre is provided with secondary wing are 120 °, and the angle between secondary wing and the operator wing is 45 ~ 60 °; The back rake angle of operator wing cutting teeth is 14 ~ 20 °.This torsion impact device five wing PDC drill bits, it is greatly very little that it compares conventional PDC bit drills drilling depth, and drilling speed is high, and drilling well comprehensive benefit is good.

Description

Torsion impact device five wing PDC drill bits

Technical field

The utility model relates to drilling tool technical field, particularly relates to a kind of torsion impact device five wing PDC drill bits.

Background technology

PDC drill bit is one of instrument of fractured rock in the earth's crust.In oil, gas drilling and other mining drill spies use PDC drill bit great majority be rotating disk bore and screw drill mode under use, there is not yet now with torsion impact device with the use of PDC drill bit.And conventional PDC drill bit is at abrasive layers such as the Permian System, the Carboniferous System, the Devonian system, Silurian, the Ordovician systems, footage per bit is few, and rate of penetration is low, makes a trip often, and drilling cost is higher.

Summary of the invention

In order to solve the problems of the technologies described above, the utility model provides a kind of torsion impact device five wing PDC drill bits, and it is greatly very little that it compares conventional PDC bit drills drilling depth, and drilling speed is high, and drilling well comprehensive benefit is good.

For this reason, the technical solution of the utility model is as follows:

A kind of torsion impact device five wing PDC drill bits, the drill bit hat of bit body front end is circumferentially provided with wing, and rear end is connecting thread, wing bottom is gauge, and gauge is provided with gauge teeth, and wing is provided with cutting teeth, be chip area between adjacent blades, in chip area, water nozzle be installed; Described wing is three operator wings and two secondary wings, and two secondary wings are arranged between two operator wings respectively, and two angles of operating between the wings that centre is provided with secondary wing are 120 °, and the angle between described secondary wing and the operator wing is 45 ~ 60 °;

The back rake angle of described operator wing cutting teeth is 14 ~ 20 °.The size of back rake angle determines the power of drill bit attack, is an important parameter of PDC drill bit.The drill bit attack of back rake angle between 14 ° to 20 ° is stronger.

Described water nozzle has five, is arranged at respectively between two adjacent blades.By bottom hydraulic field stimulation reasonable layout water nozzle, along with drilling equipment performance improves, water nozzle quantity is kept to five by seven, strengthens bit hydraulic horsepower, water nozzle jet impact force is increased, thus raising water conservancy breaks rock effect, improves drilling speed.

The height parameter of described drill bit hat is 4 ~ 6, belongs to medium altitude.

Drill bit crown height degree flattens and slow is intended to reduce when coordinating the work of torsion impact device circumferential impact force that torsion impact device produces to the impact of Cutter, make drill bit more steadily, more lasting work.

Cutting teeth on the described operator wing is two rows, and wherein a row is 2 ~ 4 and is arranged at the cutting teeth of the described operator wing from core farthest; Cutting teeth on described secondary wing is a row.The described operator wing is drill bit nose and shoulder from core farthest, be drill bit when shaft bottom operates, the position that linear velocity is maximum, be also the position that Cutter and composite sheet are are the most easily worn and torn, the second toothrow enhances the abrasive resistant ability of drill bit.If but the second toothrow (namely after toothrow) arrange too many, will rate of penetration be affected, reduce the benefit of creeping into.

Described cutting teeth is 13mm tooth, 13mm tooth is changed to by original 16mm tooth, make the easier wedging stratum of drill bit, drill bit has stronger impact resistance and abrasive resistant ability, use together with torsion impact device, be convenient to extend bit life, bore more drilling depth, reduce and make a trip number of times and time, improve drilling well comprehensive benefit.

Described drill bit is rigid body drill bit, and material changes to rigid body from carcass, and single drill bit weight is less than 68 kilograms, and quality is light, is convenient to the larger radial moment of torsion of torsion impact device conveying and alleviates radial impulse force, improve the application life of drill bit.

The torsion impact device that the utility model provides with five wing PDC drill bits compared with original PDC drill bit, its single drill bit to creep into size larger, can obtain higher rate of penetration, effectively brill number of times is carried in minimizing, enhances productivity, reduction cost of production.

Accompanying drawing explanation

Fig. 1 is the structural representation that the drill bit of the utility model torsion impact device five wing PDC drill bits is preced with;

Fig. 2 is the structural representation of the utility model torsion impact device with five wing PDC drill bits.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the torsion impact device that the utility model provides is described in detail with five wing PDC drill bits.

As shown in Figure 1, 2, a kind of torsion impact device five wing PDC drill bits, the drill bit hat of bit body 1 front end is circumferentially provided with wing, rear end is connecting thread 3, and wing bottom is gauge, and gauge is provided with gauge teeth, wing is provided with cutting teeth, the preferred 13mm cutting teeth of cutting teeth; Be chip area 103 between adjacent blades, be provided with water nozzle 104 in chip area 103, water nozzle 104 has 5, is separately positioned between two adjacent blades; Wing is divided into three the operate wing 101 and two secondary wings 102, two secondary wings 102 are arranged between two operator wings 101 respectively, two angles of operating between the wings 101 that centre is provided with secondary wing 102 are 120 °, and the angle between secondary wing 102 and the operator wing 101 is 45 ~ 60 °; The back rake angle of the operator wing 101 cutting teeth 105 is 14 ~ 20 °.Preferred drill bit is rigid body drill bit.

In an embodiment of the present utility model, the height parameter of drill bit hat is 4 ~ 6, belongs to medium altitude.

As a preferred embodiment of the present utility model, the cutting teeth on the operator wing 101 is two rows, and wherein a row is 2 ~ 4 cutting teeths being arranged at operator wing-bow portion and nose; Namely drill bit is when shaft bottom operates, the position that linear velocity is maximum; Cutting teeth on secondary wing 102 is a row.

This torsion impact device with five wing PDC drill bits compared with original PDC drill bit, its single drill bit to creep into size larger, can obtain higher rate of penetration, effectively brill number of times is carried in minimizing, enhances productivity, reduction cost of production.

Claims

1. torsion impact device five wing PDC drill bits, the drill bit hat of bit body (1) front end is circumferentially provided with wing, rear end is connecting thread (3), wing bottom is gauge, gauge is provided with gauge teeth, wing is provided with cutting teeth, is chip area (103) between adjacent blades, water nozzle (104) is installed in chip area (103); It is characterized in that:

Described wing is three operators wing (101) and two secondary wings (102), two secondary wings (102) are arranged between two operators wing (101) respectively, two angles of operating between the wing (101) that centre is provided with secondary wing (102) are 120 °, and the angle between described secondary wing (102) and the operator wing (101) is 45 ~ 60 °;

The back rake angle of the described operator wing (101) cutting teeth (105) is 14 ~ 20 °.

2. torsion impact device five wing PDC drill bits as claimed in claim 1, is characterized in that: described water nozzle (104) has five, is arranged at respectively between two adjacent blades.

3. torsion impact device five wing PDC drill bits as claimed in claim 1, is characterized in that: the height parameter of described drill bit hat is 4 ~ 6, belongs to medium altitude.

4. torsion impact device five wing PDC drill bits as claimed in claim 1, is characterized in that: the cutting teeth on the described operator wing (101) is two rows, and wherein a row is 2 ~ 4 cutting teeths being arranged at operator wing-bow portion and nose; Cutting teeth on described secondary wing (102) is a row.

5. torsion impact device five wing PDC drill bits as claimed in claim 1, is characterized in that: described cutting teeth is 13mm tooth.