CN203905817U

CN203905817U - Six-wing PDC drill with ultrahigh mechanical strength

Info

Publication number: CN203905817U
Application number: CN201420206584.3U
Authority: CN
Inventors: 王为民; 寇申盛; 肖厚恩
Original assignee: SICHUAN LIANDING SHENGJI SCIENCE & TECHNOLOGY Co Ltd
Current assignee: SICHUAN LIANDING SHENGJI SCIENCE & TECHNOLOGY Co Ltd
Priority date: 2014-04-25
Filing date: 2014-04-25
Publication date: 2014-10-29
Anticipated expiration: 2024-04-25

Abstract

The utility model discloses a six-wing PDC drill with ultrahigh mechanical strength, which comprises a drill crown (1), main wings (2) and auxiliary wings (3), wherein three main wings (2) arranged in the shape of an equilateral triangle are arranged on the drill crown (1) and in the peripheral direction of the drill crown (1); one auxiliary wing (3) is arranged between every two adjacent main wings (2); three rows of PDC compound blades (4) are arranged on each main wing (2) and each auxiliary wing (3); the blade number of each row of PDC compound blades (4) increases sequentially; spray heads (5) are arranged on the drill crown (1); three replaceable sprays (5) are arranged on the drill crown (1). The six-wing PDC drill has the characteristics of simple structure, good performance in preventing the drills from deviating from the drilling track, ultrahigh mechanical strength, good suitability for hard geological stratification layer drilling, and long service life of the drills.

Description

A kind of PDC drill bit of six wing superelevation mechanical strengths

Technical field

The utility model relates to the PDC drill bit of the hard geological stratification of drilling, particularly a kind of PDC drill bit of six wing superelevation mechanical strengths.

Background technology

At present, PDC is the special drill for oil well that substitutes old-fashioned rotary drill of oil gas field, and it has the features such as high-wearing feature, high impact-resistant, anti-oblique, anti-mud drum, high drilling speed, and PDC drill bit is described as " three height " product of high-tech, high investment, high production.When PDC drill bit in use, because PDC has high rotating speed, low the pressure of the drill, the contour performance advantage of high drilling depth, the application of PDC drill bit in oilfield drilling process, can reduce the cost of winning in oil field greatly, accelerate exploitation rate, improve the economic benefit of oilfield exploitation

PDC drill bit comprises bit adapter, drill bit, the operator wing and secondary wing, on the operator wing and secondary wing, be installed on drill bit, bit adapter is connected with drill bit, man-made polycrystalline diamond composite sheet is arranged on the operator wing and secondary wing as composite blade, and PDC drill bit is the drilling tool of the mode fractured rock that cuts.For different geo-logical terrain features, distribution situation on the operator wing and secondary wing of the durability of PDC composite blade and high efficiency and PDC composite blade and the shape of PDC composite blade have close relationship.

At present, that PDC drill bit is mainly used in creeping into is soft～in hard homogeneous formation, creep into hard formation and be rarely used in.The data of field statistics show, the mode of failure of PDC drill bit in hardpan is taking impact grinding as main.This is mainly because the feature with high rigidity, low toughness of the PDC carbide chip of PDC drill bit, in the time boring chance hard formation, because the juxtaposition metamorphose of rock is little, thereby make PDC carbide chip self in high stress state, be easy to burst apart or wear and tear, the drilling of drill bit is more and more painstaking.In addition, in the time boring the staggered stratum of chance soft or hard, drilling speed can decline, and the life-span significantly shortens.Therefore, the range of application of PDC drill bit is restricted for a long time.

Utility model content

The purpose of this utility model is to overcome the shortcoming of prior art, and a kind of simple in structure, PDC drill bit of preventing the six wing superelevation mechanical strengths that drill bit departs from drilling track, mechanical strength superelevation, is applicable to the hard geological stratification of drilling, drilling life of bit is long is provided.

The purpose of this utility model is achieved through the following technical solutions: a kind of PDC drill bit of six wing superelevation mechanical strengths, it comprises drill bit, the operator wing and secondary wing, on described drill bit and along the circumferencial direction of drill bit, be provided with three operator wings that are equilateral triangle setting, between every adjacent two operator wings, be provided with secondary wing, on each operator wing and secondary wing, be provided with three row PDC composite blades, the knife number of every row PDC composite blade increases successively, on described drill bit, is provided with shower nozzle.

On described drill bit, be provided with three removable shower nozzles.

Described PDC composite blade is common cylindrical shaped PDC composite blade.

The utlity model has following advantage: on (1) drill bit of the present utility model and along the circumferencial direction of drill bit, be provided with three operator wings that are equilateral triangle setting, between every adjacent two operator wings, be provided with secondary wing, in the time that this bit drills is met hardpan, the power that rock is around applied on the operator wing is cancelled out each other, thereby has prevented that drill bit from departing from drilling track.(2) on each operator wing of the present utility model and secondary wing, be provided with three row PDC composite blades, the knife number of every row PDC composite blade increases successively, in the time that this bit drills is met hardpan, first that minimum row PDC composite blade of knife number produces multiple tracks crushing stress and running crack on rock, generation has the rock of crushing stress to be pulverized by follow-up two row PDC composite blades successively, thereby can complete smoothly the drilling of hard layer, and three row's PDC composite blades cut hard layer successively, make the mechanical strength of this drill bit higher, longer service life.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model;

In figure, 1-drill bit, the 2-wing of operating, the secondary wing of 3-, 4-PDC composite blade, 5-shower nozzle.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is further described, protection domain of the present utility model is not limited to the following stated:

As shown in Figure 1, a kind of PDC drill bit of six wing superelevation mechanical strengths, it comprises drill bit 1, the operator wing 2 and secondary wing 3.As shown in Figure 1, on drill bit 1 and along the circumferencial direction of drill bit 1, be provided with three operator wings 2 that are equilateral triangle setting, between every adjacent two operator wings 2, be provided with secondary wing 3, in the time that this bit drills is met hardpan, the power that rock is around applied on the operator wing 2 is cancelled out each other, thereby has prevented that drill bit from departing from drilling track.

As shown in Figure 1, on each operator wing 2 and secondary wing 3, be provided with three row PDC composite blades 4, the knife number of every row PDC composite blade 4 increases successively, in the time that this bit drills is met hardpan, first that minimum row PDC composite blade 4 of knife number produces multiple tracks crushing stress and running crack on rock, generation has the rock of crushing stress to be pulverized by follow-up two row PDC composite blades 4 successively, thereby can complete smoothly the drilling of hard layer, and three row's PDC composite blades 4 cut hard layer successively, make the mechanical strength of this drill bit higher, longer service life.As shown in Figure 1, on drill bit 1, be provided with shower nozzle 5.

As shown in Figure 1, be provided with three removable shower nozzles 5 on drill bit 1, PDC composite blade 4 is common cylindrical shaped PDC composite blade.

The above is only preferred embodiment of the present utility model, be to be understood that the utility model is not limited to disclosed form herein, should not regard the eliminating to other embodiment as, and can be used for various other combinations, amendment and environment, and can, in contemplated scope described herein, change by technology or the knowledge of above-mentioned instruction or association area.And the change that those skilled in the art carry out and variation do not depart from spirit and scope of the present utility model, all should be in the protection domain of the utility model claims.

Claims

1. the PDC drill bit of a wing superelevation mechanical strength, it is characterized in that: it comprises drill bit (1), the operator wing (2) and secondary wing (3), described drill bit (1) is upper and be provided with three operator wings (2) that are equilateral triangle setting along the circumferencial direction of drill bit (1), the power that rock is around applied on the operator wing (2) is cancelled out each other, prevent that drill bit from departing from drilling track, between every adjacent two operator wings (2), be provided with secondary wing (3), on each operator wing (2) and secondary wing (3), be provided with three row PDC composite blades (4), the knife number of every row's PDC composite blade (4) increases successively, described PDC composite blade (4) is common cylindrical shaped PDC composite blade, on described drill bit (1), be provided with shower nozzle (5).

2. the PDC drill bit of a kind of six wing superelevation mechanical strengths according to claim 1, is characterized in that: on described drill bit (1), be provided with three removable shower nozzles (5).