This standard specifies the relevant terms, product classification, technical requirements, measurement methods, inspection rules, marking, packaging, storage and transportation of oil drill joint thread gauges (hereinafter referred to as gauges). This standard applies to the design, manufacture, inspection and maintenance of oil drill joint thread gauges. GB/T 4749-2003 Oil drill joint thread gauges GB/T4749-2003 standard download decompression password: www.bzxz.net

GB/T4749-2003 This standard corresponds to the API specification, Chapter 12, Specification for Gauges for Drill Tool Joints, Chapter 13: Verification of Gauges for Drill Head Screws (199? English version). This standard is not equivalent to the API specification, Chapter 2, Chapter 13, and the following differences are required:
Added "Measuring method for the diameter of the thread (see Appendix)"; ... The requirements for the flattening tolerance of the thread top are omitted; the requirements for the surface roughness of the thread and the surface of the thread are increased, and the working surface may have the same direction as the thread:
Added wear limit requirements
This standard replaces 3/T474 5-1393 Oil Drill Head Flame retardant 3 Compared with GB/T474193, this standard has the following changes: the referenced documents with and without date are distinguished: the referenced documents have cancelled the GB18& bearing and position tolerance standard measurement tightness value and /102%.119SS stone pin joint end is relatively consistent; the term "basic specification" is changed to "regional specification": the table adds major diameter and matching tightness deviation, and at the same time, the table notes API specification 7 Table 3 has been modified: the inspection example has been revised! The requirements for the maximum excavation moment have been added, the thread effectiveness specification and the quality certificate of the oil drill head have been cancelled, and the single item rate requirement has been cancelled. This standard's Appendix C and Appendix T are normative appendices, and Appendix A and Appendix H are informative appendices. This standard was issued by the Technical Requirements for Oil Equipment and Tools Standardization Committee of the month The responsible drafting unit of this standard is determined by the drafting unit. The main drafters of this standard are Li Yiya, Quan Dechan, Fei Liqian, Hao Yuying, Su Yan and Wei Biyi. The revised version of this standard is: GB474-1084.C:E/J4749-1995
1 Standard Field
Thread Specification for Joints of Petroleum Drilling Tools
FA/T 4749—2003
This standard specifies the relevant terms, product classification, technical requirements, measurement methods, inspection and maintenance specifications, marking, packaging and transportation of petroleum equipment (hereinafter referred to as specifications).
This standard applies to the design, manufacture, inspection and maintenance of petroleum equipment. 2 Normative references
All clauses in the following documents become clauses of this standard through reference to this standard. For all references with a date of month, all subsequent amendments (excluding the contents of errors) and revisions are not applicable to this standard. However, the parties who have reached an agreement based on this standard are The latest versions of these standards may be used. For any referenced parts without annotated date, the latest version shall apply to this standard. GB2361991 Hardness test for base metallurgy
B/T 63.2-1U8 Surface roughness comparison specimens for grinding, turning, inserting and machining GR/6062-2IH Product geometry specification (GPS) Nominal characteristics of contact (stylus) instruments (503274: 1996)
GB/TS253.1\1999 Drill pipe joint comparison 3 Terms and definitions
The following terms and definitions are used in this standard. 3. 1
Collective distancesiamdhff
Under certain conditions, the inner and outer tapers of the joint are measured at the specified measuring points or surfaces with the same axis. 3.2
Interchangeable distanceinterctangestnndufrThe cumulative distance between the upper and lower gauges after the prescribed parts are included, 3.3
raatingytandoft
Mating pipe distance
The cumulative distance between the same grade single gauges after the prescribed conditions are applied 4. Classification and size of gauges
4.1 Classification
4.1.1 According to the type of the thread of the joint of the petroleum tool being tested, it is divided into: a) numerical type (NC), b) regular type (REG):
limited (FH)
flat type (F).
4.1.2 The precision and purpose of the measurement are divided into:
a) Original, used for "calibration regional standards
b) Regional standards: used for calibration standards;
() Proofreading standards, used for "calibration work standards!
CB/T4749-2003
d) Working standards, used for checking cold workpieces. Note: When using working standards to test a piece of workpiece, the price can be used to check the standard. The qualified mold points in the next standard can be used as the second piece of workpiece. 4.2 Size
4.2.1 The upper size of the early standard Inch first 1 and in 1. Imperial size dead Appendix 4. Note: can record a C1a -NG15 measurement ship R inch details change meter
adjustment plate shop:
training plate:
ring diameter;
L--, total length;
L.--. ring defect length;
not regular etiquette straight light!
matching music, bZxz.net
a electric note field
allow: hand W size applies to NC13--C16.L
basic chemistry
ketone spiral effect
Vn, uh..
yn. ns:.
vn, nes
yn,n6s
才数】
h, 3h3:4)
6,35:4
Main dimensions of gauges
Oil drilling tool head mosquito disc gauge dimensions
Benzene white diameter on base surface
Digital type INC
2e ± u.4.5
(15±4,9)
Cut) working tight gauge end gauge
Unit is water
Empty stroke adjustment
Total area
Total water gauge
Record
11, 009, 525
65.0 :39.00
72.0145.0c
e0.26.2t13.273
Black standard number
Te leIx
Missing measurement and correction
V 0,03SR
-0 040
1-0 040
-n nsn
vn, nen
V-0 05-0
Screw R (
R35Gt4:
Table 1 (continued)
Measuring diameter on base
69,687
92,067
103. 429 : 1c5. 9C9
132,944
1td i e.34e
Strong law room
blood rule total
ring period total
B9. 1 :65, 7
1:4. 396. 6 8. 4
114. 3, 104. 5: 55. 4
stop type: REG
117, 240 158, 446
114.:1c2.2
114.3,129.5
1as.1:11.1
2. 41 171. 6
167,621
Shear limit type
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