CN203669752U

CN203669752U - Six-blade PDC bit for oil drilling

Info

Publication number: CN203669752U
Application number: CN201420014955.8U
Authority: CN
Inventors: 王为民; 刘萍; 寇申盛; 肖厚恩; 熊贵洲
Original assignee: SICHUAN LIANDING SHENGJI SCIENCE & TECHNOLOGY Co Ltd
Current assignee: SICHUAN LIANDING SHENGJI SCIENCE & TECHNOLOGY Co Ltd
Priority date: 2014-01-10
Filing date: 2014-01-10
Publication date: 2014-06-25
Anticipated expiration: 2024-01-10

Abstract

The utility model discloses a six-blade PDC bit for oil drilling. The six-blade PDC bit comprises a bit head portion (1), main blades (2) and auxiliary blades (3). The main blades (2) and the auxiliary blades (3) are arranged on the bit head portion (1), the bit head portion (1) is provided with the three main blades (2) and the three auxiliary blades (3), the three main blades (2) are arranged on the bit head portion (1) in a triangular shape and are provided with large PDC composite blade bodies (5) respectively in track directions of the main blades (2), the three auxiliary blades (3) are provided with small PDC composite blade bodies respectively (6) in the track directions of the auxiliary blades (3), the protruding height H1 of the large PDC composite blade bodies (5) ranges from 7 mm to 9 mm, and the protruding height H2 of the small PDC composite blade bodies (6) ranges from 4 mm to 5 mm. The six-blade PDC bit has the advantages of being simple in structure and large in bearing force, improving the cooling effect of the PDC composite blade bodies, prolonging service life, reducing labor amount, and improving drilling efficiency.

Description

A kind of six wing PDC drill bits for oil drilling

Technical field

The utility model relates to a kind of oilfield drilling operation field six wing PDC drill bits for downhole tool drill bit, particularly a kind of oil drilling.

Background technology

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, PDC is the special drill for oil well that substitutes old-fashioned rotary drill of current oil gas field, 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.

The performance of PDC drill bit is the structures shape of the composite blade on permanent position and the major and minor wing of the quantity of drill bit, major and minor wing by major and minor wing on drill bit completely.Normally used six wing PDC drill bits, the proud exposure of the PDC composite blade on major and minor wing is identical, when this drill bit wedging is to underground when more than 4000 meters, drill bit can run into several meters of one decks thick in hard and extremely hard formation, this stratum contains a large amount of hard rocks, after composite blade wearing-in period on these rocks and major and minor wing is long, the damage of the forms such as the composite blade on major and minor wing all can wear and tear, extruding, shearing, therefore, this PDC drill bit can only wedging soft shale stratum in.And these hard rocks can make the major and minor wing of drill bit be subject to force unbalance, thereby make drill bit well drilling rail sideslip, finally cause drilling well to proceed, at this moment need workman by drill bit from the underground taking-up drill bit of more than 4000 meters and bit change more, so not only increase the amount of labour, had a strong impact on drilling efficiency, be unfavorable for producing.

Utility model content

The purpose of this utility model is to overcome the shortcoming of prior art, provide a kind of simple in structure, comprehensive mechanical performance is high, improve PDC composite blade cooling effect, extend drilling life of bit, save the amount of labour, improve the six wing PDC drill bits for oil drilling of drilling efficiency.

The purpose of this utility model is achieved through the following technical solutions: six wing PDC drill bits for a kind of oil drilling, it comprises drill bit, the operator wing and secondary wing, the operator wing and secondary wing are all arranged on drill bit, on drill bit, be provided with shower nozzle, on described drill bit, be provided with three operator wings and three secondary wings, three described operator wings are in drill bit setting triangular in shape, three described secondary wings are triangular in shape to be crisscross arranged between three operator wings, on three described operator wings, on edge operator wing course bearing, be provided with large PDC composite blade, on three described secondary wings along being provided with little PDC composite blade on secondary wing course bearing, the proud exposure H1 of described large PDC composite blade is 7 ~ 9mm, the proud exposure H2 of little PDC composite blade is 4 ~ 5mm.

Described large PDC composite blade and little PDC composite blade are cylindrical PDC composite blade.

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

The utlity model has following advantage: on (1) drill bit of the present utility model, be provided with three operator wings and three secondary wings, three described operator wings are in drill bit setting triangular in shape, three described secondary wings are triangular in shape to be crisscross arranged between three operator wings, have the advantages that bearing capacity is large, when drill bit is when creeping at a high speed hard in containing and extremely hard formation, solid rock can be applied on the operator wing and secondary wing simultaneously, therefore, whole bit force balance, prevent the well drilling rail sideslip of drill bit, save labour, improve the efficiency of drilling well, extend drilling life of bit.(2) the proud exposure H1 of large PDC composite blade of the present utility model is 7 ~ 9mm, the proud exposure H2 of little PDC composite blade is 4 ~ 5mm, when the initial stage of hard in drill bit wedging and extremely hard formation, only there is large PDC composite blade to participate in cutting stratum, and little PDC composite blade does not participate in cutting, therefore, along with the continuation wedging of drill bit, large PDC composite cutter sector-meeting wearing and tearing, in the time that the proud exposure of large PDC composite blade is less than the proud exposure of little PDC composite blade, little PDC composite blade just participates in cutting, little PDC composite blade has guaranteed drill bit hard and extremely hard formation from get out, save the amount of labour, shorten drilling period, improve drilling efficiency.

Accompanying drawing explanation

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

Fig. 2 is the A-A sectional view of Fig. 1;

In figure, 1-drill bit, the 2-wing of operating, the secondary wing of 3-, 4-shower nozzle, the large PDC composite blade of 5-, the little PDC composite blade of 6-.

The specific embodiment

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 depicted in figs. 1 and 2, a kind of six wing PDC drill bits for oil drilling, it comprises drill bit 1, the operator wing 2 and secondary wing 3, the operator wing 2 and secondary wing 3 are all arranged on drill bit 1, on drill bit 1, be provided with shower nozzle 4, on drill bit 1, be provided with three replaceable shower nozzles 4, on described drill bit 1, be provided with three operator wings 2 and three secondary wings 3, three described operator wings 2 are in drill bit 1 setting triangular in shape, three described secondary wings 3 are triangular in shape to be crisscross arranged between three operator wings 2, have the advantages that bearing capacity is large, when drill bit is when creeping at a high speed hard in containing and extremely hard formation, solid rock can be applied on the operator wing 2 and secondary wing 3 simultaneously, therefore, whole bit force balance, prevent the well drilling rail sideslip of drill bit, save labour, improve the efficiency of drilling well, extend drilling life of bit.On three described operator wings 2, on the edge operator wing 2 course bearings, be provided with large PDC composite blade 5, on three described secondary wings 3 along being provided with little PDC composite blade 6 on secondary wing 3 course bearings, the proud exposure H1 of described large PDC composite blade 5 is 7 ~ 9mm, and the proud exposure H2 of little PDC composite blade 6 is 4 ~ 5mm.Described large PDC composite blade 5 and little PDC composite blade 6 are cylindrical PDC composite blade, when the initial stage of hard in drill bit wedging and extremely hard formation, only there is large PDC composite blade 5 to participate in cutting stratum, and little PDC composite blade 6 does not participate in cutting, therefore, along with the continuation wedging of drill bit, large PDC composite blade 5 can reduce by wearing and tearing proud exposure H1 gradually, in the time that the proud exposure H1 of large PDC composite blade 5 may wear to the proud exposure H2 that is less than 6 of little PDC composite cutters, little PDC composite blade 6 just participates in cutting, little PDC composite blade 6 has guaranteed drill bit hard and extremely hard formation from get out, shorten drilling period, improve drilling efficiency.

Claims

1. six wing PDC drill bits for oil drilling, it comprises drill bit (1), the operator wing (2) and secondary wing (3), the operator wing (2) and secondary wing (3) are all arranged on drill bit (1), on drill bit (1), be provided with shower nozzle (4), it is characterized in that: on described drill bit (1), be provided with three the operator wings (2) and three secondary wings (3), described three operator wings (2) are in drill bit (1) setting triangular in shape, described three secondary wings (3) are triangular in shape to be crisscross arranged between three operator wings (2), described three operator wings (2) are upper along being provided with large PDC composite blade (5) on the operator wing (2) course bearing, described three secondary wings (3) are upper along being provided with little PDC composite blade (6) on secondary wing (3) course bearing, the proud exposure H1 of described large PDC composite blade (5) is 7 ~ 9mm, the proud exposure H2 of little PDC composite blade (6) is 4 ~ 5mm.

2. six wing PDC drill bits for a kind of oil drilling according to claim 1, is characterized in that: described large PDC composite blade (5) and little PDC composite blade (6) are cylindrical PDC composite blade.

3. six wing PDC drill bits for a kind of oil drilling according to claim 1, is characterized in that: on described drill bit (1), be provided with three replaceable shower nozzles (4).