A kind of impregnated tooth suitable for strong abrasive hard formation and its preparation method

A hard formation and impregnated technology, which is applied in the direction of earthwork drilling, drilling equipment, drill bits, etc., can solve the problem that the formula design of impregnated teeth is not strong enough, the impregnated matrix does not match the drilled rock formation, and the impregnated matrix Low hardness and wear resistance, etc., to achieve good self-sharpening, not easy to fall off prematurely, and strong bezel setting

Active Publication Date: 2017-01-04
KINGDREAM PLC CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still two problems in the existing impregnated teeth: on the one hand, the formula design of the impregnated teeth is not specific enough, which often results in a mismatch between the impregnated matrix and the drilled rock formation, the difficulty of continuous cutting of diamonds, and low drilling efficiency ; On the other hand, for specific formations such as strong abrasive hard formations, the hardness and wear resistance of the impregnated matrix are generally low, and most of the copper-based tooth materials are used, and the strength is not high enough. The force is not strong, the carcass is easy to be worn, causing the diamond to fall off prematurely, and the service life of the impregnated teeth is low. Generally, it will fail after dozens of hours of use.

Method used

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  • A kind of impregnated tooth suitable for strong abrasive hard formation and its preparation method
  • A kind of impregnated tooth suitable for strong abrasive hard formation and its preparation method
  • A kind of impregnated tooth suitable for strong abrasive hard formation and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take by weighing 11.82 grams of tungsten carbide, 2.73 grams of cobalt powder, 1.82 grams of copper powder, 0.91 grams of nickel powder, and 0.91 grams of manganese powder, mix well and add alcohol solution made of glycerol (the volume ratio of glycerol and alcohol is 3:1 , the same below) Wet particle size 30-35 mesh, 2.24 grams of diamond (diamond concentration 120%), mix well and then granulate, the diameter of the pellet is about 1.2mm, the photo of the prepared pellet is as follows figure 1 As shown, the prepared spheres were put into the mold, and pressed into Φ13 / 16mm (diameter 13mm, length 16mm, cylindrical) impregnated teeth under the process of sintering temperature 1080°C, sintering pressure 50MPa, and holding time 6min. Pictures of pregnant teeth figure 2 It can be seen from the figure that the diamond particles on the cross-section of the impregnated tooth are relatively large and distributed evenly in the impregnated matrix.

[0028] The compaction degre...

Embodiment 2

[0031] Weigh 13.11 grams of tungsten carbide, 1.87 grams of cobalt powder, 1.87 grams of copper powder, 0.94 grams of nickel powder, and 0.94 grams of manganese powder. The diamond concentration is 120%), mix well and then granulate, the pellet diameter is about 1.2mm, then put the prepared pellets into the mold, press into Φ13 / 16mm pregnant teeth.

[0032] The compaction degree of the impregnated tooth prepared in this example was 97.1%, the bending strength of the impregnated tooth was 580 MPa, and the compressive strength was 1610 MPa.

[0033] The above impregnated teeth were brazed to prepare a Φ100 / 75mm coring test drill bit, and the micro-drill bench was used to simulate the working conditions in the laboratory to conduct a drilling test on granite. 2 , rotation speed 1000rpm, cooling water flow rate 3.12L / min drilling process conditions, measured average ROP is 2.10m / h, wear amount is 0.085mm / h, service life is 188h.

Embodiment 3

[0035] Weigh 11.82 grams of tungsten carbide, 2.73 grams of cobalt powder, 1.82 grams of copper powder, 0.91 grams of nickel powder, and 0.91 grams of manganese powder. Diamond concentration 120%), mix well and then granulate, the pellet diameter is about 1.0mm, then put the prepared pellets into the mold, press into Φ13 under the process of sintering temperature 1080℃, sintering pressure 40MPa, holding time 6min / 16mm impregnated teeth.

[0036] The compaction degree of the impregnated tooth prepared in this example is 98.1%; the bending strength of the impregnated tooth is 730 MPa, and the compressive strength is 1665 MPa.

[0037] The above impregnated teeth were brazed to prepare a Φ100 / 75mm coring test drill bit, and the micro-drill bench was used to simulate the working conditions in the laboratory to conduct a drilling test on granite. 2, rotation speed 1000rpm, cooling water flow 3.12L / min drilling process conditions, the measured average ROP is 1.96m / h, wear amount i...

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Abstract

The invention relates so an impregnated tooth applicable to a high-abrasiveness hard formation and a preparation method of the impregnated tooth. The impregnated tooth comprises an impregnated matrix and a diamond which is arranged in the impregnated matrix in an impregnated mode. The impregnated matrix comprises, by weight, 60% to 70% of tungsten carbide, 10% to 25% of cobalt powder, 5% to 10% of copper powder, 2.5% to 5% of nickel powder and 2.5% to 5% of manganese powder. The preparation method comprises the steps that the components for preparation of the impregnated matrix are evenly mixed, and then granulation is carried out on the mixture and diamond particles which are wetted by a glycerol alcoholic solution so that balls can be formed, wherein the concentration of the diamond ranges from 110% to 150%; the prepared balls are placed into a mold to be processed through sintering forming so that the impregnated teeth applicable to the high-abrasiveness hard formation can be obtained, wherein the sintering temperature ranges from 1080 DEG C to 1100 DEG C, the sintering pressure ranges from 40 MPa to 50 MPa, and the temperature holding time ranges from 5 min to 10 min. The impregnated tooth is high in strength, abrasive resistance and drilling efficiency, and long in service life.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling, and relates to an impregnated tooth of an impregnated diamond drill bit, in particular [0002] In particular, it relates to an impregnated tooth suitable for strong abrasive hard formations and a preparation method thereof. Background technique [0003] It is very common for oil drilling to encounter strong abrasive hard formations in deep wells. Such formations have high shear strength. The main rock breaking method of traditional diamond (PDC) bits is shearing. The PDC teeth are subjected to a large twisting force during the formation process, and it is difficult to effectively penetrate into the rock; while the roller cone bit drills into a strong abrasive hard formation, the drill bit is prone to natural whirling vibration, and its carbide teeth are subjected to high impact loads It is even bigger, leading to the problems of frequent tooth breakage and low service life of the cem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/46B22F1/00B22F3/14
Inventor 王晋春张烈华许林徐磊
Owner KINGDREAM PLC CO
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