SY/T 5547-2000 Use, maintenance and management of screw drilling tools
Some standard content:
ICS 75.180.10
Registration number: 8149—2001
Petroleum and natural gas industry standard of the People's Republic of China SY/T 5547--2000
Operation maintenance and management for positive displacement mud motor2000- 12 - 12 Issued
State Administration of Petroleum and Chemical Industry
2001— 06 -01 Implementation
SY/T 5547--2000
2 Use of screw drilling tools
3 Technical requirements for maintenance of screw drilling tools
4 Management of screw drilling tools
Appendix A (Appendix to the standard))
Appendix B (Appendix to the standard)
Appendix C (Suggestive Appendix)
Appendix D (Suggestive Appendix)
Replacement cycle of wearing parts
Format of screw drill tool use and maintenance file
Table of screw drill tool stator temperature calibration values, format of screw drill tool use parameter card
SY/T5547—2000
Screw drill tools are tools that convert liquid pressure energy into mechanical energy and drive the drill bit to drill. Their quality has the most direct impact on the drilling cycle. Due to the continuous improvement of the structure of the drilling tool and the further improvement of the technical requirements, in order to make the use, maintenance and management of power drilling tools have a unified standard, so as to standardize the use, maintenance and management of screw drilling tools and improve drilling efficiency, this standard has revised SY5547-92 "Use, Maintenance and Management of Bottom Hole Power Drill Tools". This standard will replace SY5547-92 from the month of entry into force. Both Appendix A and Appendix B of this standard are appendices to the standard. The appendixes (and Appendix 1) of this standard are both informative appendices. This standard is proposed by China National Petroleum Corporation. This standard is under the jurisdiction of the Petroleum Drilling Engineering Professional Standardization Committee. The drafting units of this standard are: Dagang Youtian Group Directional Well Technology Service Company, Dagang Oilfield Group Zhongcheng Manufacturing Co., Ltd. Screw Drill Tool Manufacturing Plant.
The main drafters of this standard are Liao Chengsong, Yi Tuxin, Zhang Hailiang, and Li Mingqian. This standard was first issued in February 1993, and this is the first revision. 1 Scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Screw Drill Tool Use, Maintenance and Management
Operatinn maintcnance and nanagement for positive displacenent mud motor This standard specifies the use, maintenance and management of screw drill tools for drilling (holes). This standard is applicable to screw drill tools whose circulating medium is drilling fluid. 2 Use of screw drill toolsbzxz.net
2.1 Use parameters
See the instruction manual of each manufacturer. 2.2 Conditions of use
2.2.1 The sand content of the drilling fluid is less than 1%. Use with caution in drilling fluids with saturated brine. 2.2.21 The working environment is generally not more than 120℃, and the maximum temperature is not more than 150℃. 2.2.3 There is no blockage in the inner hole of the drilling tool used. 2.2.4 A drill pipe filter must be added when using. 2.3 Inspection before going down the well
2.3.1 The transmission shaft should rotate flexibly and the threads at both ends are intact. 2.3.2 Check the axial clearance. The recommended value of the axial clearance can be found in the product manuals of each manufacturer. 2.3.3 Check the bypass valve at the wellhead. It should be free to move and the bypass hole should be unobstructed. SY/T 5547—2000
Replaces SY 5547—92
2.3.4 Parallel test operation. When the pump is turned on and off, the bypass valve should be opened and closed flexibly immediately; when the pump is turned on and circulated, the drill bit can be lowered only when it operates normally. 2.4 Drilling
The lowering speed should be less than 1.5m/sc
2.4.2 When encountering resistance during drilling, the drill bit should be rotated and lifted and lowered as much as possible. 2.4.3 Do not stop the drill or press the drill bit on the bottom of the drill. 2.5 Drilling
2.5.1 After drilling, start the pump circulation until 2~3m from the bottom, and gradually increase the displacement to the specified value, and then slowly lower it to the bottom of the drill. 2.5.2 Pay close attention to the change of pump pressure during drilling, so that the drill bit works within the specified load pressure drop range. If it exceeds the specified range, the pump should be stopped, the drill bit should be lifted, and then the pump should be restarted to start the drill bit. 2.5.3 Pay attention to the active drill bit regularly during drilling to prevent sticking and jamming of the drill bit. 2.5.4 Lift the drill bit immediately when the pump is stopped.
2.6 Drilling
2.6.1 When drilling, do not use the turntable to unload. 2.6.2 After drilling, rinse the screw drill with clean water to remove the residual drilling in the drill, and measure the axial clearance. If it exceeds the standard, it should be repaired.
3 Technical requirements for the maintenance of screw drills
3.1 Disassembly requirements
Approved by the State Administration of Petroleum and Chemical Industry on December 12, 2000 and issued on June 1, 2001
SY/T5547—2000
3.1.1 The disassembly of screw drills must be carried out in accordance with the requirements of the maintenance manual provided by the manufacturer. 3.1.2 All disassembled parts should be cleaned, decontaminated, and rust-proofed, and the moving parts should be greased when assembled. 3.1.3 When disassembling the parts connected with anaerobic sealant, the parts can be evenly heated by means of a blowtorch, etc. The heating temperature cannot exceed 120℃, and the heating length should be strictly controlled. 3.1.4 When the main wearing parts reach the replacement cycle or the size exceeds the specified requirements, they should be checked and replaced in time. The recommended replacement cycle of wearing parts is shown in Appendix A (Appendix of the standard).
3.1.5 When disassembling the external thread, the distance between the fixed pliers and the power pliers to the end of the thread shall not be less than 250mm3.2 Bypass valve assembly
3.2.1 Bypass valve body:
a) The threads at both ends shall be subjected to non-destructive testing, and there shall be no cracks, hairlines and other defects that affect the use; b) The internal and external thread surfaces and end faces of the valve body shall not have scratches, marks, bumps, corrosion, erosion marks, and surface roughness c) The inner surface of the valve body shall not have peeling, scratches, corrosion, erosion and other phenomena, and the surface matching with the piston shall be smooth and free of defects, and the wear shall be less than 0.5mm;
d) The wear of the retaining ring groove shall not exceed 50% of the groove depth; e) The bypass hole shall be intact.
3.2.2 Valve core:
a) The inner and outer surfaces of the valve core are not allowed to have serious erosion, pitting, and cracks, and the surface should be smooth; b) The sealing surface must be smooth, no defects are allowed, and the wear should not be greater than 0.5mm; c) The bypass hole and the "O" ring groove are not allowed to have erosion, corrosion, and deformation. 3.2.3 Valve sleeve:
a) The inner and outer surfaces of the valve sleeve are not allowed to have serious erosion, pitting, and cracks, and the surface should be smooth: b) The sealing ring groove and the "O" ring groove on the sleeve are not allowed to have erosion, corrosion, and deformation. 3.2.4 Spring:
a) The spring surface has no defects such as rust, erosion, and cracks, and the end face should be flat and undamaged; b) The spring should be replaced if it has been working under the pressure for 500 hours continuously. 3.2.5 The retaining ring has no defects such as rust, erosion, and cracks, and has good elasticity. 3.2.6 All types of sealing rings should be replaced every time they are repaired. 3.2.7 The valve hole assembly should be complete, and the filter screen should not be severely eroded. If it is severely eroded, it should be replaced. 3.2.8 When assembling the bypass valve, the inner and outer surfaces must be lubricated with grease; after assembly, move the valve core several times, and it should be flexible and free of obstruction.
3.3 Motor assembly
3.3.1 Stator:
a) Check the threads at both ends. There should be no punctures, burrs or scars. 6) Check the inner diameter surface of the stator rubber for any falling pieces, cracks, grooves or severe wear. c) The stator rubber is firmly bonded to the steel body. Check the rubber at both ends of the stator. If the debonding length is less than 25mm, lathe it off and continue to use it. Only lathe it off once (the stator with a diameter D<95mm drill bit is not allowed to be repaired). d) The stator rubber should not have falling pieces with a diameter greater than 6mm and a depth greater than 3mm. e) The inner diameter of the stator rubber should have no less than 6 measuring points, and then take the average measurement value. The measuring temperature is based on 21°C. Otherwise, refer to Appendix C (Suggested Appendix) for temperature correction. 3.3.2 Rotor:
3.3.2.1 The end thread and the transition arc of the end should be subjected to non-destructive testing. There should be no defects such as punctures, burrs, scars, cracks and sticking that affect the use.
3.3.2.2 The end thread surface and end face are not allowed to have burrs, dents and other defects that damage the connection sealing performance. 2
SY/T5547—2000
3.3.2.3 Check whether there is pitting, erosion, corrosion, and chromium layer shedding on the rotor surface. If shallow and small cracks are found, they should be polished and repaired in time. If any of the following situations occurs, the rotor cannot be used any more: a) There is a depth of less than 1.6mm and a width of less than 3.2mm, large pieces of medium pitting with a number exceeding 10;
b) Severe pitting with a depth greater than 3.2mm and a width greater than 6.4mm: c) Severe erosion with a depth greater than 1.6mm and a length greater than 12.7mm; d) The depth of bubbling caused by corrosion of the chrome plating layer is greater than 3.2mm. 3.3.2.4 Use an outside micrometer to measure the rotor diameter, with no less than 8 measuring points, and finally take the average value. 3.3.3 The fit between the stator and the rotor is an interference fit, and the interference value should meet the requirements of the manufacturer's maintenance manual. 3.3.4 After the stator and rotor are assembled, the motor assembly is tilted at 30° for a water filling test. The recommended value of leakage after 5 minutes is shown in Table 1. Table 15min recommended value of leakage
Drilling tool diameter D
Leakage
3.4 Universal shaft assembly
3.4.1 Universal shaft outer cylinder
D≤95
95
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