SY/T 5426-2000 Rock drillability determination and classification method SY/T5426-2000 standard download decompression password: www.bzxz.net

ICS 75.020
Registration number: 6969—2000
Petroleum and natural gas industry standard of the People's Republic of ChinaSYT 5426-2000
Rock drillability measurement and its classification
Rock drillability measurement and its classification2000- 03 - 31 Issued
State Administration of Petroleum and Chemical Industry
Implementation on 2000-10-01
SY/T5426—2000
This standard is a revision of SY5426-91 "Rock drillability measurement and its classification". On the basis of the rock drillability measurement and classification of roller bits, the rock drillability measurement and classification of PIX drill bits is added, and some clauses are modified to make the content of this standard complete, the structure reasonable and easy to use.
This standard is proposed by China National Petroleum Corporation. This standard is under the jurisdiction of the Petroleum Drilling Engineering Professional Standardization Committee. From the date of entry into force, this standard will replace SY542G-91. The drafting unit of this standard is the Drilling Technology Research Institute of the Petroleum Exploration and Development Research Institute. The main drafters of this standard are Yang Defeng and Fan Jian. The first release time of this standard was January 1992, and this version is the first revision. Scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Rock drillability measurement and classification method
Rock drillability measurement and its classification This standard specifies the method and classification of rock drillability with micro drill bits: This standard applies to the rock drillability classification of roller drill bits and IPI drill bits used for oil drilling. 2 Method for determining rock drillability with roller drill bits
2.1 Sample preparation
2.1.1 The sample is made of downhole cores or ground rock samples taken from oil drills. 2.1.2 The sample specifications are as follows:
a) Cylindrical sample: height 30~80rmm: diameter 40~100mm; b) Square sample: length × width is 100mm×100mm: height 20~100mm2.1.3 The parallelism tolerance value of the two end faces of the sample is less than or equal to 0.2 mmz2.1.4 Before the test, place the sample in a drying oven set at 105110°C for 24 hours. 2.2 Test equipment
2.2.1 The rotating loading device shall meet the following requirements: a) Ensure that the static load drilling pressure is 84UN±10N, and the calibration gauge accuracy is 0.5%; b) Ensure that the dynamic load drilling pressure is 890N±20N; c) The spindle rotation speed is 55r/min±1r/min2.2.2 Depth measuring instrument:
Measure the drilling depth value. The accuracy is 0.01mm
2.2.3 Timing instrument:
The accuracy is 0.01%.
2.2.4 Micro drill:
SY/T 5426--2000
Replace SY 5426--91
The micro needle head is formed by inserting a blade shaft and a spacer on the drill body. The diameter after assembly is 31.751I1. The assembly diagram is shown in Figure 1.
a) Blade: alloy tool steel, hardness HRC58~62, size see Figure 2; b) Blade shaft: alloy tool steel, hardness HRC58~62; c) Spacer: alloy tool steel, hardness HRC58~62, size see Figure 3; d) Drill body: 45# steel, quenched and tempered, hardness TIB260--280. 2.3 Test procedure
2.3.1 Install the sample, adjust the depth and time measuring instruments to zero, and start the test device. 2.3.2 Start timing when the drilling depth reaches 0.2mm, and then drill 2.4mm deeper, record the drilling time, and stop drilling. 2.3.3 Repeat the above procedure for each sample. 3 Method for Determining Rock Drillability of PDC Drill Bits
Approved by the State Administration of Petroleum and Chemical Industry on 2000-03-31 Implemented on 2000-10-01
3.1 Sample Preparation
SYT 54262M0
Mountain Opening Pin
Figure 1 Schematic diagram of the assembly of a roller micro drill bit
Technical requirements
1. Number of teeth Z=1A
2. Paint hardness HRC5B~62
Perform according to 2.1.1~2.1.4.
3.2 Test instruments and equipment
3.2.1 The rotating load device shall meet the following requirements: a) Ensure that the static load drilling pressure is 500N±10N, and the calibration tool accuracy is 0.5%: 1. 66 8: 96
Figure 3 Gasket
b) Ensure that the dynamic load drilling pressure is 500N±20N; SY/T 5426—2000
) The spindle rotation speed is 551/min=lr/minu3.2.2 Depth measuring instrument
Measure the drilling depth value with an accuracy of 0.01mm
3.2.3 Timing instrument
The accuracy is 0.01sn
3.2.4 Micro drill bit
The micro drill bit is to clamp two PrC composite sheets symmetrically on the head rigid body. After assembly, the outer diameter of the drill bit is 32mm, the rear angle is 20°, and the side angle is 15°. The assembly diagram is shown in Figure 4, where: a) composite sheet: diameter is 13.3mm, thickness is 4.5mm; b) pressure plate: 45# steel annealing treatment, hardness HRC40~50; c) drill body: 35 chromium molybdenum, quenching and tempering treatment, hardness HB260~280. 3.3 Test procedure Www.bzxZ.net
3.3.1 Install the sample, zero the depth and time measuring instruments, and start the test device. 3,3.2 Start timing when the drilling depth reaches 1mm, and then drill 3mm deeper, record the drilling time, and stop drilling. Repeat the above procedure three times for each sample. 3.3.3
4 Calculation method
4.1 Rock drillability grade value screening formula
Ka = log2t
Formula: K&
Drillability grade value:
Average drilling time,
Formula instructions
After obtaining the drillability grade value, Xingyan Right Drillability Classification Standard Reference Table (see Table 1) is used for grading. Table 1
4.3 Data processing
3～<4
5 --<6
9～<10
Drilling time is rounded to three significant figures.
Rock drillability classification comparison table
Drilling time
22 -<23
24 -25
26 -27
27 28
24,-<2:
SY/T S426—2000
13. 9×4. 5amPx short piece
Inner hexagon nail
New head
Figure 4 Schematic diagram of PLC micro drill assembly
4.3.2 For relatively homogeneous rock, take the arithmetic mean of the three drilling times: for inhomogeneous rock with a dispersion coefficient greater than 15%, take the geometric mean of the three drilling times.
4.3.3 Rock drillability test record is shown in Table 2. 4
Tester:
Ladder and segment
Test of micro drill bit
SY/T 5426-2000
Table 2 Rock drillability test record
Rock sample description
Cone drill bit
Drilling time
Checker:
HDC drill bit
Drilling time
Date:
The rock sample for inspection is a homogeneous rock of medium hardness. When the relative error between the initial drilling grade value of the new drill bit and the drilling grade value of the used drill bit is greater than 0.2, it should be replaced.
6 Rock drillability classification
Rock drillability classification of roller drill bits and PIXC drill bits is carried out according to Table 1. 5
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