CN101788436B

CN101788436B - Method for measuring abrasion ratio of polycrystalline diamond compact

Info

Publication number: CN101788436B
Application number: CN2010100301975A
Authority: CN
Inventors: 方海江; 高华; 李宏利
Original assignee: HENAN SIFANG SUPER HARD MATERIAL CO Ltd
Current assignee: HENAN SIFANG SUPER HARD MATERIAL CO Ltd
Priority date: 2010-01-18
Filing date: 2010-01-18
Publication date: 2011-11-02
Anticipated expiration: 2030-01-18
Also published as: CN101788436A

Abstract

The invention discloses a method for measuring abrasion ratio of a polycrystalline diamond compact (PDC), which is characterized by fixing the PDC on a lathe saddle, cutting concrete blocks with the PDC, computing the bulk losses of the PDC and the concrete blocks and defining the ratio of the bulk losses of the concrete blocks to the bulk loss of the PDC as the abrasion ratio of the PDC, wherein the concrete blocks are prepared by uniformly stirring a certain proportion of cement, aggregates and water, pouring the mixture into a die, compactly vibrating the mixture, solidifying the vibrated mixture and curing the solidified mixture for several days; and the concrete blocks comprise 10-50% of cement, 20-60% of aggregates and 5-30% of water by weight. The method is less in measurement errors and can accurately reflect the abrasion resistance of the PDC.

Description

A kind of measuring method of polycrystalline diamond compacts (PDC) wear resistance ratio

Technical field

The present invention relates to grinding tool and field of measuring technique thereof, especially relate to a kind of measuring method of polycrystalline diamond compacts (PDC) wear resistance ratio.

Background technology

At present, polycrystalline diamond compacts (PDC) (PDC) is widely used in oil and the geological drilling field, and in its application process, the height of wearing quality is a very important technical indicator.People have carried out a large amount of explorations for the detection method of PDC anti-wear performance for a long time.It is at present domestic that what generally adopt is the wear resistance ratio detection method of formulating according to industry standard JB/T3235-1999, promptly carry out grinding with vitrified bond 80 order SiC emery wheels edge to PDC to be measured under certain linear velocity and certain normal pressure, PDC to be measured and grinding tangential method are miter angle.The wearing quality that recently quantizes PDC with the emery wheel abrasion loss in weight and the PDC abrasion loss in weight.Abroad, states such as Russia, day adopt PDC and emery wheel to mill, in the hope of the method for wear resistance ratio.And western countries such as English, U.S. adopt the method for lathe " cutting " grouan mostly.These two kinds of methods respectively have relative merits: can unify codes and standards with emery wheel, but in actual detected, because the quality of SiC emery wheel itself is subjected to the influence of multiple complicated factors such as all the quality index, emery wheel fabrication process parameters of raw material vitrified bond and SiC abrasive material, uncertainty is very big; The quality that PDC is ground is very little, causes measuring error; The shape of PDC to be measured, size and even chamfering whether difference in addition, cause often differing bigger with a slice composite sheet wear resistance ratio, and the method can not correctly be simulated the course of work of PDC, bias toward " grinding " effect that detects PDC, ignored PDC " cutting " effect in actual use; Then meet application category more with grouan, because rock drilling, cutting rock, grinding rock etc. all are the interactions between PDC and the rock.But differ in nature grouan various places, same rock mass is very not identical yet, thereby repeatedly measuring result error is bigger to cause same composite sheet wear resistance ratio, so find quite difficulty of a kind of grouan of unifying standard, so exist different schools in the world all the time, using different grinding things respectively is object.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of measuring method of polycrystalline diamond compacts (PDC) wear resistance ratio, the composite sheet wear resistance ratio error of measurement is less, can reflect the anti-wear performance of PDC exactly.

For achieving the above object, the present invention by the following technical solutions:

(PDC) is fixed on the lathe saddle with polycrystalline diamond compacts (PDC), cut concrete block with polycrystalline diamond compacts (PDC), calculate the loss volume of PDC and concrete block, the ratio of concrete block loss volume and PDC loss volume is the PDC wear resistance ratio, and concrete block is to be stirred, pour in the mould, vibration compacting, solidified and maintenance is made after some day by a certain proportion of cement, sandstone and water; By mass percentage, 10-50%, the sandstone that cement accounts for the raw material gross weight in the concrete block raw material 20-60%, the water that account for the raw material gross weight accounts for the 5-30% of raw material gross weight.

Further, described sandstone is made up of one or more kinds in rubble, coarse sand, medium sand and the fine sand, and ballast grain sizes is 5-10mm, and the coarse sand particle diameter is 3-6mm, and the medium sand particle diameter is 1-3mm, and the fine sand particle diameter is less than 1mm.

The invention has the beneficial effects as follows:

This method adopts homemade concrete block as a kind of grinding thing, this grinding thing manufacture craft is simple, material is unified, be evenly distributed, to the real work of PDC may grinding the stratum similar, and can ignore the influence of the factor such as shape, size, chamfering of composite sheet, so the composite sheet wear resistance ratio error of measuring is less, same composite sheet repeatedly measurement result differs also very little, and the simulation that the concrete method of testing of this employing lathe " cutting " is correct the practical work process of PDC, reacted the anti-wear performance of PDC accurately.The invention solves defectives such as traditional and instability existing domestic and international various wear resistance ratio measuring method measurement results and error be bigger, the wear resistance ratio of surveying correct reflected the anti-wear performance of composite sheet in real work, and provide the grinding thing of standard for unified PDC wear resistance ratio measurement standard.

Other advantages of the present invention and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can obtain instruction from the practice of the present invention to investigating hereinafter.

Description of drawings

Fig. 1 is natural rock and a self-control concrete vertical lathe measurement wear resistance ratio comparison diagram among the embodiment one.

Fig. 2 is natural rock and a self-control concrete vertical lathe measurement wear resistance ratio comparison diagram among the embodiment two.

Specific embodiments

Below in conjunction with accompanying drawing and example the present invention is further described:

The measuring method of polycrystalline diamond compacts (PDC) wear resistance ratio of the present invention adopts the way of lathe grinding, the grinding thing is by a certain proportion of cement, the concrete block that sandstone and water are made, to make concrete block by oneself is fixed on the vertical lathe workstation, and it is surface grinding is smooth, worktable is with the rotational speed of 50rpm, PDC is fixed on the knife rest, radially the depth of cut is 160mm/min, length feed 0.5mm, stop test behind the each turning 15km of composite sheet, calculate the loss volume of PDC and concrete block, the PDC wear resistance ratio is the ratio of concrete block loss volume and PDC loss volume, is unit with ten thousand.Do removing material with the red grouan in Wulian, the blue or green grouan in Jinan, Red Sandstone and self-control concrete respectively, getting four 1913 composite sheet tests on these four kinds of materials respectively, the vertical lathe operational factor as mentioned above, the turning distance is respectively 10km, 15km, 5km and 15km, and the turning distance is to decide according to the wearing quality of every kind of removing material.Every a kind of material of composite sheet turning, diverse location turning four times, comparison of test results as depicted in figs. 1 and 2, Fig. 1 and Fig. 2 the raw material proportioning described in corresponding following examples one and the embodiment two respectively make concrete block.

Embodiment one,

In the present embodiment, sandstone will be sieved and washed totally, and sandstone is made up of coarse sand, medium sand and fine sand, and the coarse sand particle diameter is controlled at 3-6mm, and the medium sand particle diameter is controlled at 1-3mm, and the fine sand particle diameter is controlled at below the 1mm.1100kg fine sand, 100kg medium sand, 200kg coarse sand, 1100kg cement and 480kg water are put into stirring machine to stir, the general stirring about 30min poured in the mould of diameter 1600mm vibration compacting into, maintenance was removed mould after 7 days, can come into operation after solidifying 28.With the natural rock comparison of test results as shown in Figure 1.

Case study on implementation two,

In the present embodiment, sandstone will be sieved and washed totally, and sandstone is made up of rubble, coarse sand, medium sand and fine sand, and ballast grain sizes is controlled at 5-10mm, and the coarse sand particle diameter is controlled at 3-6mm, and the medium sand particle diameter is controlled at 1-3mm, and the fine sand particle diameter is controlled at below the 1mm.100kg rubble, 1000kg fine sand, 150kg medium sand, 250kg coarse sand, 1000kg cement and 480kg water are put into stirring machine to stir, the general stirring about 30min poured in the mould of diameter 1600mm vibration compacting into, maintenance was removed mould after 7 days, can come into operation after solidifying 28.With the natural rock comparison of test results as shown in Figure 2.

Can find out that by Fig. 1, four kinds of removing material wear resistance ratios contrast shown in Figure 2 the self-control concrete is done four test bit and differed very little, three kinds of natural rocks then float bigger in addition; The stability that the self-control concrete is measured wear resistance ratio can embody the anti-wear performance of composite sheet in real work more accurately significantly better than natural rock.

Claims

1. the measuring method of a polycrystalline diamond compacts (PDC) wear resistance ratio, it is characterized in that: polycrystalline diamond compacts (PDC) is fixed on the lathe saddle, cut concrete block with polycrystalline diamond compacts (PDC), calculate the loss volume of polycrystalline diamond compacts (PDC) and concrete block, ratio with concrete block loss volume and polycrystalline diamond compacts (PDC) loss volume is defined as the polycrystalline diamond compacts (PDC) wear resistance ratio, and concrete block is to be stirred, pour in the mould, vibration compacting, solidified and maintenance is made after some day by a certain proportion of cement, sandstone and water; By mass percentage, 10-50%, the sandstone that cement accounts for the raw material gross weight in the concrete block raw material 20-60%, the water that account for the raw material gross weight accounts for the 5-30% of raw material gross weight.

2. the measuring method of a kind of polycrystalline diamond compacts (PDC) wear resistance ratio according to claim 1, it is characterized in that: described sandstone is made up of one or more kinds in rubble, coarse sand, medium sand and the fine sand, ballast grain sizes is 5-10mm, the coarse sand particle diameter is 3-6mm, the medium sand particle diameter is 1-3mm, and the fine sand particle diameter is less than 1mm.