SU1375785A1 - Diamond drill bit - Google Patents

Description

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1375785

The invention relates to the drilling of exploration wells, namely to diamond drill bits.

Known diamond crown, consisting of a crown ring, diamond-containing matrix, connected by a welding layer to the crown body, and flushing channels "

The disadvantage of this crown is low efficiency when drilling in strong, low-abrasive rocks as a result of rapid polishing of diamonds.

Closest to the proposed technical essence and the achieved result is a diamond drill bit, comprising a housing, at the working end of which flush grooves and sectors are made, including diamond-bearing and welding layers and an insert from easily destructive abrasive material 2.

The disadvantage of this crown is the complexity of the design associated with the use of springs for increasing the contribution, and the low reliability of fastening the diamond layer with its considerable height and small sector length.

The purpose of the invention is to simplify the design of the crown and increase its efficiency by increasing the reliability of attachment of the diamond layer to the welding layer. I.

The goal is achieved by the fact that in a diamond drill bit containing a body, at the working end of which

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The second sector of the matrix (Fig. 3) is made of a diamond-bearing impregnated layer 3 and a liner 4 connected by means of a welding layer 5 with a crown 1.

The diamond-bearing impregnated layer 3 of each sector 2 is designed as an inclined parallelepiped (Fig. 3 and 4). The top face parallel to the lepiped is connected to the welding layer 5 of sector 2, and the opposite face is cutting. The rear inclined side face parallel to the lepiped is connected to the liner 4, the opposite face is the inclined wall of the wash channel 6. The resulting design of the diamond-bearing layer 3 of the sector 2 allows for an increase in the area of adhesion of the matrix with the crown and thereby use a higher impregnated layer

25 you, that increases the resource of the crown.

The inserts 4 have the shape of a triangular prism, one of the lateral faces of which is rigidly connected to the weld layer 5, and the other with an inclined

Here, the back side face of the diamondiferous layer of ZoVladshsh 4 is made of les coorusable abrasive material KopoHka works as follows. I

35 When the diamonds are worn on the cutting face, due to the inclined position of the diamond-bearing impregnated layer 3, the diamonds of the subsequent layers are evenly put into operation.

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flush grooves and sectors, 40 formed trapezoid channel

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The second sector of the matrix (Fig. 3) is made of a diamond-bearing impregnated layer 3 and a liner 4 connected by means of a welding layer 5 to the crown body 1.

The diamond-bearing impregnated layer 3 of each sector 2 is made in the form of an inclined parallelepiped (Fig. 3 and 4). The top face of the parallelepiped is connected to the welding layer 5 of sector 2, and the opposite face is cutting. The rear inclined side face of the parallelepiped is connected to the liner 4, and the opposite face is the inclined wall of the wash channel 6. The resulting construction of the diamond-bearing impregnated layer 3 of the sector 2 structure allows to increase the area of adhesion of the matrix with the crown 1 of the crown and thereby use the impregnated layer greater height, which increases the resource of the crown.

The inserts 4 have the shape of a triangular prism, one of the side faces of which is rigidly connected with the welding layer 5, and the other with an inclined

The back side face of the diamond layer Zo Vlasshshsh 4 is made of lightly abrasive abrasive material. KopoHka works as follows. I

5 When the cutting edge diamonds are worn, due to the inclined arrangement of the diamond-bearing impregnated layer 3, the diamonds of the subsequent layers are evenly put into operation.

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Including an amazon-bearing and welding layers, It is an adjacent liner of easily-destructive abrasive material, the diamond layer is made in the form of a parallelepiped with inclined front to back edges, and the insert is in the form of a triangular prism, one face of which is rigidly connected to the welding layer, and the other is connected to nakloiny rear edge of the diamond layer.

Fig, 1 shows a crown, a general view; in fig. 2 is the same, the view from the side of the working end in FIG. 3 - crown sector, longitudinal section in FIG. 4 - part of the sector, axonometrics.

The crown contains a housing 1 and a matrix consisting of sectors 2. Each

6, besides improving the thermal regime at the bottomhole, helps to reduce the flow rate of the washing liquid. This ensures the removal of smaller

particles of the destroyed rock mass, and heavier particles of abrasive, which are formed when the easily destructible abrasive insert is worn, remain on the bottom and fall under

the end of the crown, the method of self-sharpening of the diamond-bearing impregnated layer 3. The dimensions of the particles of the abrasive material of the insert 4 are selected so as to ensure

optimal release of diamond grains of the impregnated layer 3.

Application of the proposed crown. Allows you to avoid polishing alfig .1

Fig, 2.

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FIG.

Claims (1)

A DIAMOND DRILLING CORE containing a body, on the working end of which there are flushing grooves and sectors, including a diamond bearing and welding layers and an adjacent liner of easily destroyed abrasive material, characterized in that, in order to simplify the design and increase the efficiency of the crown by increasing reliability fastening the diamond-nasal layer to the welding, the diamond-bearing layer is made in the form of a parallelepiped with inclined front and rear faces, and the liner is in the form of a triangular prism, one side face which is rigidly connected to the brewing layer, and the other to the inclined back edge of the diamond layer. m x m 00 s