Some standard content:
SY/T 5074-91, Petroleum and Natural Gas Industry Standard of the People's Republic of China
Power Tongs for Oil Well Repair
Published on November 20, 1991
Ministry of Energy of the People's Republic of China
Implementation on May 1, 1992
1 Subject Content and Scope of Application
Petroleum and Natural Gas Industry Standard of the People's Republic of ChinaPower Tongs for Oil Well Repair
SY/T.5074-91
Replaces SY5074--85
This standard specifies the terminology, type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of power tongs for oil well repair.
This standard applies to power tongs used to tighten or unscrew the threads of pumping rods, oil pipes and small drill pipes or similar rods and pipes when repairing wells in oil fields.
2 Reference standards
GB699 Technical conditions for high-quality carbon structural steel
GB 700 Carbon structural steel
GB5676 Cast carbon steel for general engineering
GB1356 Reference tooth shape of involute cylindrical gears GB1357 Module of involute cylindrical gears
JB179 Precision of involute cylindrical gears
GB1048 Nominal pressure and test pressure of pipes and pipeline accessories JB1799NGW planetary gear reducer
:3 Terms
Maximum torque, that is, low gear torque shortening, refers to the maximum torque M1 of the power tongs in low gear: a.
b. High gear torque: the maximum torque M of the power tongs in high gear; low gear speed: the speed of the tongs head in low gear,
high gear speed, that is, the maximum speed, the speed of the tongs head in high gear d.
Maximum transfer weight: the weight of the heaviest component that is not allowed to be disassembled during transportation. e.
Type and basic parameters
4.1 Basic type of power tongs
The tongs head is a front plate cam clamping mechanism, and the transmission is a two-speed mechanical speed gear transmission. Tongs head structure type
Open tongs;
Closed tongs:
Live tongs.
Drive mode
Hydraulic;www.bzxz.net
b. Dynamic;
Approved by the Ministry of Energy of the People's Republic of China on November 20, 1991 and implemented on May 1, 1992
c. Electric.
4.1.3 Speed change type
a. Flexible clutch speed change:
Rigid clutch speed change;
Semi-flexible clutch speed change.
4.2 Power tongs model representation method
Example:
SY/T 5074—91
The maximum torque is 6kN·m, and the flexible speed change opening type 1 hydraulic tongs are marked as: XQ6YR-14.3 Basic parameters
The application scope and basic parameters of the power tongs shall comply with the provisions of Table 1. 5 Technical requirements
Variant design, indicated by Arabic numerals,
Basic type not indicated
Speed change type:
Flexible:
G——Rigidity:
B——Semi-flexible
Drive mode:
Y—Hydraulic;
Q—Qigong:
—Electric
Maximum torque,
Clamp head structure type:
Open-end clamp not indicated,
B—Closed-end clamp:
H—Live-end clamp
Code for power clamps for oil well repair
6.1 Power tongs shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved through the prescribed procedures. 2
Basic parameters
Applicable pipe diameter
mm (in)
Minimum torque, kN·㎡
High gear torque, kN·m
High gear speed, r/min
False gear speed, r/min
Opening size, mm
Maximum transfer mass, kg
Oil pipe 60, 731
(23/8127/:)
Sucker rod 29
90~120
SY/T 6074--81
Oil pipe 60: 731 88.9
(2*/g.27/s，31/.)
Oil pumping 29
80~110
5.2 The grade and technical requirements of steel castings shall comply with the provisions of GB5676. 5.3 The steel forgings shall comply with the steel grade and technical requirements specified in GB699 and GB700 and the Ministry of Metallurgy. XQ12
Oil pipe 88.9，114
(31/27 41/2)
Drill pipe 60.3；73；88.9
70~100
5,4 Gears are designed and manufactured according to GB1356 and GB1357, and short tooth gears are recommended. Gear precision is manufactured according to JB179, with a precision of 7 to 8 levels. It is recommended that the closed gear pair of the open pliers head adopt a larger side clearance. 5.5 The planetary transmission shall be manufactured and inspected in accordance with the requirements of JB1799. 5.6 The tooth tip width of the tooth plate shall not be greater than 0.15mm. 5.7 When the power tongs clamp the oil pipe and rotate in the air, the axial deviation between the oil pipe and the power tongs head shall not be greater than 1.4mm. 6.8 Under the action of continuous torsion, the various specifications of pipes shall not slip when biting. Under the action of the sensitive torque, the bite mark width shall not be greater than 0.40; under the action of the maximum torque, the bite mark width shall not be greater than 0.80mm. 5.9 The power tongs should run smoothly without obstruction. 5.10 The suspension system makes the power tongs move downward or upward by not less than 50mm. 5.11 The operating system should be flexible, accurate and reliable, and the accuracy rate of the operating system of the open-end tongs to the gap shall not be less than 96%. 5.12 Under normal use conditions (before the overhaul of the power tongs), the number of times the thread is tightened or unscrewed shall not be less than 80,000 times. The service life of the tooth plate is measured by the number of times of tightening or unscrewing the thread, not less than 1000 times, and the brake disc and thrust ring are not less than 150×10\ times. 5.13 All supporting liquid, gas and electrical components must have a certificate of conformity. 5.14 The liquid and gas system should be pressure tested, and the test pressure shall be in accordance with GB1048. Keep under the test pressure for 3 minutes, and there shall be no drowning or damage to the system.
5.15 The main parts must be printed.
5.16 The power tongs are equipped with a torque indicator or a tension gauge when leaving the factory. Before use, calibrate the tightening and screwing torque or control the tightening and unscrewing torque.
6 Test method
6.1 No-load test
.SY/T. 5074—91
The whole machine can be tested without load only after all parts are assembled and qualified. First, turn it by hand, in the forward and reverse directions, high and low gears, respectively, for two times. After there is no blockage, turn it in the forward and reverse directions, high and low gears, respectively, for 0.5 hours. 6.2 Cut-off load test
The load test should simulate the use situation on the test bench, tighten or unscrew the oil pipe thread. The test load should gradually increase the torque from low to high, and increase by 10%~20% each time. The number of times and load should comply with the provisions of Table 2. Table 2
Loading torque
Number of tests
Maximum torque M1
6.3 Test of coaxiality of clamped oil pipe
One-half maximum torque M12
Attached figure Schematic diagram of coaxiality measurement
High gear torque M
Select three points A, B, and C on the pipe diameter at the closest point above the center line of the clamp teeth, and measure with a micrometer. The bracket of the meter is fixed on three positions of the upper clamp shell (as shown in the attached figure). Each position measures a set of data in the forward and reverse rotation direction of the oil pipe: a total of six groups are measured at three positions, and the arithmetic average is taken as the test result.
6.4 Noise test coaxiality measurement
Use a Class A sound level meter to measure four points at 0 and 8 meters away from the working position at the same level of the power clamp working position, and take the average value as the test result.
Inspection rules
SY/T 5074—91
In addition to the inspection according to 6.1, B.2, the following inspections shall be carried out and the inspection results shall be included in the power tongs product certificate. The bite mark and bite mark width of the clamped oil pipe slip test shall comply with the provisions of Article 5.6 1a.
Main parts are not allowed to have residual deformation:
The inspection of the coaxiality of the clamped oil pipe shall comply with the provisions of Article 5.7; The inspection results of the maximum displacement of the suspension system shall comply with the provisions of Articles 5 and 10: The noise test shall not exceed 90dB (A)
Inspection of basic parameters;
Appearance quality inspection.
During the test, the connectors and fasteners shall not be loose; there shall be no oil leakage at the sealing and jointing points. Marking,
Packaging and storage
Exposed processing surfaces and rotating parts shall be coated with neutral anti-rust grease and packed with oil paper. Each power tong should have a product label before packing, and the label content includes: 8.2
Manufacturer's mark:
Product name:
Model,
Technical parameters,
Factory number:
Manufacturer name
Manufacture year and month.
8,3 The power tongs packaging should be moisture-proof and rain-proof. The parts in the box should be fixed reliably and not collided. The instrument packaging should be shock-proof. The random documents should be sealed in a plastic bag and packed together with the power tongs accessories. 8.4 The random technical documents include:
: a: Product certificate:
: b. Product instruction manual;
c Delivery list and packing list:
d. Spare parts atlas and wearing parts atlas.
Additional instructions.
This standard is proposed and managed by the National Petroleum Drilling Equipment and Tools Standardization Committee. This standard is drafted by Lanzhou Petroleum Machinery Research Institute. The main drafters of this standard are Wang Weimin and Jing Lian.
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