Some standard content:
ICS 75.180.10
Registration No.: 8183—2001
Petroleum and Natural Gas Industry Standard of the People's Republic of China SY/T 5217—2000
Diamond drilling bits and diamond core bitsPublished on December 25, 2000
State Administration of Petroleum and Chemical Industry
Implementation on June 1, 2001
SY/T5217—2000
Cited standards
Classification and representation of drill bits
Technical requirements
Test methods
Inspection rules
Marking, packaging, transportation and storage
SY/T5217—2000
This standard is a revision of SY/T5217-92 "Diamond drill bits and diamond core drill bits". In order to meet the needs of international trade, technology and economic exchanges, and to be consistent with international standards or advanced foreign standards as much as possible, this standard has been revised with reference to the provisions of API Spec 7 "Specification for Rotary Drilling Equipment" (39th edition) on the size and tolerance gauges of the drill bit, the thread of the joint, etc.; the backward diamond material standards and related provisions in the original standard have been deleted; the content of 3.1 "Classification and representation of drill bits" in the original standard has been revised with reference to the new version of IADC (International Association of Drilling Contractors)/SPE23940 in 1992; 4.11 of the original standard proposed the requirement of gas sealing test for drill bits equipped with nozzles, and this standard has changed the test content to clean water sealing test according to the actual working conditions of the drill bit; this standard has added the mechanical properties requirements and test methods of the drill bit body material. In addition, according to the requirements of GB/T1.1 and GB/T1.3, this standard has revised the original standard in terms of writing format. From the date of entry into force, this standard will also replace SY/T5217-92. This standard is proposed and managed by the National Technical Committee for Standardization of Petroleum Drilling Equipment and Tools. This standard was drafted by: Chengdu General Machinery Factory of Sichuan Petroleum Administration Bureau, Chuanshi Christensen Diamond Drill Bit Co., Ltd. This standard was drafted by Li Wanlin and Fan Xiaole. This standard was first issued in November 1992, and this is the first revision. 1 Scope www.bzxz.net
Petroleum and Natural Gas Industry Standard of the People's Republic of China Diamond Drill Bits and Diamond Core Bits
Diamond Drilling Bits and Diamond Core BitsSY/T5217—2000
Replaces SY/T5217—92
This standard specifies the classification and representation methods, technical requirements, test methods, inspection rules, and marking, packaging, transportation and storage of diamond drill bits and diamond core bits. This standard applies to the design, manufacture and inspection of diamond drill bits and diamond core bits (hereinafter referred to as drill bits) for oil and natural gas drilling.
2 Referenced Standards
The following standards contain provisions that constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T229—1994 Metal Charpy Notch Impact Test Method GB/T 1184—1996
GB/T2967—1989
GB/T3077—1999
GB/T3458—1982
GB/T3851—1983
Shape and position tolerances without tolerance values
Casting tungsten carbide
Alloy structural steel
Technical conditions for tungsten powder
Determination method of transverse fracture strength of cemented carbide Petroleum drill pipe joint thread
GB/T9253.1—19992||t t||SY/T5216—2000 Coring tools
Specifications for rotary drilling drill stem components
SY/T6407—1999
3 Classification and representation of drill bits
3.1 Classification of drill bits
The drill bit classification number consists of four characters. The first character is an English letter indicating the material of the drill body. The second to fourth characters are Arabic numerals indicating the drill bit tooth density, the size of the polycrystalline diamond composite (hereinafter referred to as PDC) or the type of cutting teeth, and the crown profile shape of the drill bit.
3.1.1 The classification of PDC drill bits shall comply with the provisions of Table 1. 3.1.2 The classification of natural diamond drill bits and thermally stable polycrystalline diamond (hereinafter referred to as TSP) drill bits shall comply with the provisions of Table 2. 3.2 Method of indicating drill bit model
3.2.1 The drill bit model consists of three parts: drill bit diameter code, manufacturer named model and drill bit classification number formulated according to this standard, as shown in Figure 1. 3.2.2 Each drill bit manufacturer can compile the manufacturer named model of its own product as needed, and at the same time, a comparison table between the manufacturer named model and the drill bit classification number of this standard should be formulated.
3.2.3 Drill bit model indication method:
Example 1 (full-hole drilling bit): 8%R426/S231 Among them, the drill bit diameter code is 82, indicating that the full-hole drilling bit diameter is 215.9mm (8%in); the manufacturer's model name is R426; the drill bit classification number of this standard is S231 (the drill bit body material code S indicates that the drill bit body is steel; the tooth density code 2 indicates that the State Petroleum and Chemical Industry Bureau approved it on December 25, 2000 and implemented on June 1, 2001
SY/T5217—2000
is medium; the PDC tooth diameter code 3 indicates that the PDC tooth diameter is 13.44mm; the drill crown profile height code 1 indicates fishtail shape). Table 1 Classification of PDC drill bits
Drill bit body material
PDC tooth density
(equivalent number of teeth)
(≤30)
(>30~40)
(>40~50)
PDC tooth diameter code
Fishtail
PDC drill bit crown profile height code
(<58mm)
(58~114mm)
(>114mm)
The "equivalent number of teeth" in the table is used to measure the tooth density of the PDC drill bit. The calculation of the "equivalent number of teeth" is based on a drill bit with a diameter of 215.9mm (8.5in) and a cutting tooth with a diameter of 13.44mm (0.529in). When the drill bit diameter and cutting tooth diameter are different from the benchmark, they should be converted. The specific calculation method is as follows:
Equivalent number of teeth of the drill bit;
Where: 2—
D—drill bit diameter;
n—number of types of cutting teeth on the drill bit (cutting teeth of the same diameter are classified into one category); Z;, d;—represent the number and diameter of the first type of teeth respectively (excluding PDC teeth on the gauge surface). 2 When there are cutting teeth of several diameters on the same drill bit, the determination of the drill bit PDC tooth diameter code should be based on the largest number of teeth (excluding teeth on the gauge surface).
Table 2 Classification of natural diamond drill bits and TSP drill bits Drill body
(matrix)
Cutting teeth
Density code
(tooth particle size)
[<3 particles/0.2g (1 carat) )】
[37 grains/0.2g (1 carat)]
[>7 grains/0.2g (1 carat)]
Cutting tooth classification code
Natural diamond
Mixed tooth
Natural diamond
Mixed tooth
Natural diamond
Mixed tooth
Flat
Drill crown profile height code| |tt||(<58mm)
（58~114mm）
（>114mm）
SY/T5217—2000
Drill classification number of this standard
Manufacturer naming model
Drill diameter code (full drilling drill bits are expressed in English units, core drill bits are expressed in metric units) Figure 1 Drill bit model expression method||tt| | Example 2 (coring drill bit): 215.9×105SC226/M723, where the drill bit diameter code is 215.9×105, indicating that the outer diameter of the coring drill bit is 215.9mm and the inner diameter is 105mm; the manufacturer's model is SC226, and the drill bit classification number of this standard is M723 (the drill bit body material code M indicates that the drill bit body is matrix type; the cutting tooth density code 7 indicates that the cutting teeth are 3 to 7 grains/0.2g (1 carat); the cutting tooth classification code 2 indicates that the cutting tooth is TSP; the drill crown profile height code 3 indicates that the drill crown profile height is medium). Technical requirements
The nominal size and tolerance of the drill outer diameter shall comply with the provisions of Table 3 4.1
Table 3 Nominal size and tolerance of drill outer diameter
Nominal size
625/32 ~9
92~13%
132%/32~17
88.90~171.45
172.24~228.6
229.39349.25
350.04~444.50
Note: For some special-purpose PDC drill bits, products with tolerances different from those specified in this table can be manufactured according to user requirements. 4.2 The nominal size and tolerance of the inner diameter of the core drill bit shall comply with the provisions of Table 4. Table 4 Nominal size and tolerance of the inner diameter of the core drill bit Nominal size
Outer diameter of the core drill bit||tt| |142.9~152.4
152.4~165.1
165.1~190.5
190.5~215.9
215.9~244.5
215.9~244.5
Inner diameter of core drill bit
Note: For drill bits of special sizes proposed by users, products with inner diameter dimensions and tolerances different from those specified in this table may be manufactured according to user needs. 3
SY/T5217—2000
4.3 The connecting thread of the full-bore drill bit shall comply with the provisions of Table 5. Table 5 Connecting thread of full drilling drill bit
Nominal size of drill bit outer diameter
4 1/32 ~5
5 y32 ~ 7 %
7132 ~ 9%
9 1%32 ~ 14
14 1%/32 ~ 17
88.9~114.3
115.09~127.00
127.79~187.33
188.12~238.13
238.92~368.30
369.07~444.50
4.4 The connecting thread of the core drill bit shall comply with the provisions of SY/T5216. Specification and type of connection thread
Chamfer diameter of joint
4.5 The cast tungsten carbide used to make the drill bit matrix shall comply with the provisions of GB/T2967, and the tungsten powder shall comply with the provisions of GB/T3458. 4.6 The drill bit steel body and joint materials shall comply with the provisions of GB/T3077, and the tensile strength shall be greater than 736MPa. 4.7 After sintering, the surface of the drill bit matrix is not allowed to have defects such as reticular cracks and looseness that affect the inlay of the cutting teeth. 4.8 The weld between the drill bit body and the joint shall not have defects such as cracks, slag inclusions, and pores. Tolerance
4.9 The perpendicularity of the working end face of the drill bit to the axis of the connection thread and the coaxiality of the outer cylindrical face of the drill bit to the axis of the connection thread shall not be lower than the requirements of grade 10 accuracy in GB/T1184-1996. 4.10 The coaxiality of the axis of the inner and outer cylindrical surfaces of diamond core drill bits to the axis of the connecting thread shall not be lower than the 8th grade accuracy specified in GB/T1184-1996.
4.11 Mechanical properties of drill body materials (excluding steel body drill bits): bending strength shall not be lower than 530MPa, and impact toughness shall not be lower than 2J
4.12 The nozzle outlet area TFA (cumulative calculation) of PDC drill bits is the sum of the outlet area of the replaceable nozzle and the outlet area of the fixed nozzle.
4.13 The calculation formula for the total liquid flow area TFA of the water channel of TSP drill bits and natural diamond drill bits is as follows: TFA=a+b
Wherein: a——-the water channel area at 1/3 of the drill bit diameter, mm2; - the annular area occupied by the exposed cutting teeth at 1/3 of the drill bit diameter, mm2. 4.14 The surface of the PDC drill bit involved in cutting is not allowed to have diamond breakage; the number of broken teeth of TSP drill bits and natural diamond drill bits shall not exceed 2% of the total number of teeth on the working surface, and no more than two broken teeth shall be allowed in a local area (100mm2). 4.15 For drill bits that all use replaceable nozzles, a clean water sealing test should be carried out. 5 Test method
5.1 Inner and outer diameter inspection of the drill bit.
5.1.1 Ring gauge for drill bit outer diameter:
The outer diameter of the full-hole drill bit and the core drill bit is inspected by ring gauge, and the size of the through ring gauge and the stop ring gauge used shall comply with the provisions of (a) and (b) in Figure 2. The chamfer size is not indicated in Figure 2, but the effective height of the working surface (inner cylindrical surface) of the ring gauge shall be no less than 25.4mm
5.1.2 Plug gauge for core drill bit inner diameter:
The inner diameter of the core drill bit is inspected by the inner diameter plug gauge, and the size of the through plug gauge and the stop plug gauge used shall comply with the provisions of (a) and (b) in Figure 34
Drill bit diameter +38
Minimum limit diameter of drill bit +0.051\%
(a) Through ring gauge
(a) Through cold gauge
SY/T5217—2000
Figure 2 Drill bit outer diameter measuring ring gauge
Figure 3 Coring drill bit inner diameter measuring plug gauge
Drill bit diameter+38
Drill bit minimum limit diameter-0.0510.076
(b) Stop ring gauge
(b) Stop cold gauge
. The chamfer size is not indicated in Figure 3, but the effective length of the plug gauge working surface (outer cylindrical surface) should be not less than 25.4mm. 5.1.3 Inspection precautions:
Use the drill bit outer diameter ring gauge to inspect the drill bit outer diameter. The through ring gauge should be able to pass, while the stop ring gauge cannot pass; use the coring drill bit inner diameter plug gauge to inspect the coring drill bit inner diameter. The through plug gauge should be able to pass, while the stop plug gauge cannot pass. During the inspection, the temperature difference between the gauge and the drill bit shall not exceed 11°C. 5.2 Mechanical property test of drill bit body material: 5.2.1 Mechanical property test of drill bit steel body and joint material shall be carried out in accordance with GB/T229; Mechanical property test of drill bit body material shall be carried out in accordance with GB/T3851.
5.2.2 Mechanical property test of drill bit body material Sampling shall be carried out at the drill bit gauge diameter part (see Figure 4), but diamond or other cutting materials on the surface shall be avoided.
5.2.2.1 The size of the bending test specimen is 40mm×5mm×5mm (3 specimens are taken at the same gauge diameter part). 5.2.2.2 The size of the impact test specimen is 55mm×10mm×8mm (3 specimens are taken at the same gauge diameter part). 5.3 The full-hole drill bit connection thread shall be inspected in accordance with the method required by GB/T9253.1 and shall comply with the provisions of this standard. 5.4 The core drill bit connection thread should be inspected according to the method required by SY/T5216 and comply with the provisions of this standard. 5.5 Fix the drill bit on the inspection device and measure the coaxiality of the drill bit, which should meet the requirements. 5.6 For drill bits with replaceable nozzles, install the nozzle plug, connect the pressure test joint, and tighten the threads. The clean water pressure test should not be less than 5MPa, and the pressure should be maintained for 5 minutes. There should be no leakage.
Inspection rules
6.1 Factory inspection
SY/T5217—2000
Figure 4 Schematic diagram of test sampling
The piece-by-piece inspection items and random inspection items for drill bits leaving the factory are shown in Table 6. Table 6 Inspection items for drill bits
Inspection items
Outer diameter of drill bits
Inner diameter of drill bits
Connecting threads
Network cracks on the surface of drill bits
Weld between drill bits and joints
Verticality of the end face of drill bits to the axis of the connecting threadsCoaxiality of the axis of the outer cylindrical surface of the drill bits (and the inner cylindrical surface of the core drill bits) and the axis of the connecting threadsClean water sealing test (only carried out when all the nozzles of the drill bits are replaceable)
Cut tooth damage on the working surface of the drill bits||tt| |Mechanical properties of drill body material
Type inspection
Factory inspection
Full drilling drill
Note: "" indicates piece-by-piece inspection; "×" indicates no inspection; "△" indicates sampling inspection, one piece is inspected for every 20 pieces produced. 6.2 Type inspection
6.2.1 The following situations should be subject to product type inspection: a) Before new products are put into mass production;
b) When the product has major changes in structure, materials and process; c) When the superior quality supervision department proposes to conduct type inspection. 6.2.2 Randomly select 1 piece from 5 pieces or normal production batches for type inspection. The type inspection items are shown in Table 6. 6
Coring drill
6.3 Judgment rules
SY/T5217—2000
6.3.1 Products shall be inspected before delivery according to the items specified in Table 6. If one item of the item in the piece-by-piece inspection fails, the drill bit is considered a defective product. If one item of the item in the random inspection fails, the batch of drill bits is considered defective and shall be transferred for piece-by-piece inspection. Defective products that can be repaired shall be shipped after being repaired and passed the inspection. 6.3.2 If one item in the type inspection fails, the type inspection shall be deemed as failed. The cause shall be checked, measures shall be taken, and the type inspection shall be reorganized.
7 Marking, packaging, transportation and storage
7.1 Marking
The drill bit shall be marked permanently on the surface of the shackle groove of the joint as follows: a) drill bit model;
b) connection thread code;
c) factory date or factory number;
d) total flow area TFA value (for drill bits with replaceable nozzles, if the user requires no nozzle, this item shall be omitted); e) manufacturer's name or trademark.
7.2 Packaging
7.2.1 Use special packing boxes, one per box. The drill bits should be equipped with anti-collision facilities in the box or be securely packed in other ways. Anti-rust grease should be applied to the connection threads before packing.
7.2.2 The packing box should be accompanied by the drill bit product certificate, instruction manual, drill bit usage record card and packing list. 7.2.3 The packaging box should indicate the product specifications, model, gross weight and net weight, packaging box size, manufacturer name, factory date or product number, recipient and address.
7.3 Transportation
During transportation and handling, the drill bits should be handled with care to avoid damaging them. 7.4 Storage
The products should be stored in dry and ventilated conditions to prevent rain. Under normal transportation and storage conditions, if the drill bits are rusted or the performance is affected due to poor manufacturing quality within 3 months from the date of delivery, the manufacturer shall be responsible.
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