SY/T 5587.15-1993 Oil and water well routine workover drilling and cement plugging operation procedures SY/T5587.15-1993 standard download decompression password: www.bzxz.net

Petroleum and Natural Gas Industry Standard of the People's Republic of China SY/T 5587. 15-93
Routine well repair and operation for oil and water wells
Drilling and cement plugging operation procedures
Published on September 9, 1993
China National Petroleum Corporation
Implemented on March 1, 1994
1 Subject content and applicable specifications
Petroleum and Natural Gas Industry Standard of the People's Republic of China Conventional well repair and operation for oil and water wells
Drilling and cement plugging operation procedures
SY/T 5587. 1593
This standard specifies the operation design, operation preparation, operation procedures, quality control, safety requirements, operation quality requirements and inspection of drilling and cement plugging.
This standard applies to drilling and cement plugging operations for oil and water wells. 2 Reference standards
SYT5587.3 Conventional well repair operations for oil and water wells Well killing and replacement spraying operation procedures 3 Operation designbzxZ.net
3.1 Data collection
For data items and requirements, see the provisions of the basic data table in Appendix A (Supplement) A2.2. 3.2 Equipment selection
According to the well conditions and equipment capabilities of the operating well, select the power equipment required for lifting, drilling, milling and circulation. a, Lifting equipment: well-drilling machine, combined operation machine, well repair operation machine: b, Drilling and milling equipment: screw drilling tools, rotary table, power faucet; c, Circulation equipment: cement truck, mud pump, well washing machine. 3.3 Drill bit (grinding shoe) selection
The outer diameter of the drill bit (grinding shoe) should be smaller than the inner diameter of the casing by 6~~10mmz3.4 Well repair fluid selection
The well repair fluid prepared according to the data of this well should meet the well killing fluid standards. 3.5 Abbreviation Operation Design
The format and content of the design book shall comply with the provisions of Appendix A (Supplement). 4 Operation Preparation
4.1 Preparation of Pipe String
. The well site is equipped with a lowered pipe string that meets the design requirements: b. The pipe string is neatly arranged, clean, and 0.3m above the ground; c. The length of the pipe string is strictly measured, and the error is not greater than 0.2m/km. 4.2 Drill Bit (Grinding Shoe) Preparation
a. The well site is equipped with a drill bit (grinding shoe) that meets the design requirements: b. Before going down the well, the outer diameter, inner diameter, length and buckle type of the drill bit (grinding shoe) must be accurately measured, and a schematic diagram must be drawn. 4.3 Equipment Preparation
The lifting, rotating and circulating power equipment must be in place before operation, and must be inspected and debugged to be qualified. Approved by China National Petroleum Corporation on September 9, 1993 and implemented on March 1, 1994
4.4 Wellbore preparation
SY/T 5587.15-93
Down the wellbore pipe string to the cement plug surface, and conduct wellbore cleaning. 4.4.1 When using a screw-cup drill, the length and diameter of the wellbore gauge should meet the design requirements. 4.4.2 When not using a screw drill, the wellbore should be unobstructed, the cement plug surface depth should be accurate and there should be no fallen objects before drilling the cement plug. 4.5 Workover fluid preparation
1.5 to 2.0 times the volume of the wellbore should be available on site. 5 Operation procedures
5.1 Drilling cement plug with screw drill
5.1.1 Check the working condition of the screw drill on the ground. If it does not meet the requirements, it shall not be opened. 5.1.2 The drilling tools are as follows: drill bit (grinding shoe), screw drilling tool, pressurized drill string, buffer, downhole filter, lifting short joint, oil pipe (drill pipe).
5.1.3 Lower the drilling tools.
5.1.4 Connect the inlet and outlet pipelines. The pipeline between the circulation equipment and the wellhead should be connected in series with the surface filter. 5.1.5 Lower the drill bit (grinding shoe) to 5m from the top of the cement plug surface and start the pump for positive circulation. After the circulation is normal, slowly lower the drilling tools and pressurize to 510kN. The annular return speed is not less than 0.8n/s.
5.2 Drilling cement plug with power faucet
5.2.1 The drilling tools are as follows: drill bit (grinding shoe), drill pipe, power faucet. 5.2.2 Lower the drilling tools.
5.2.3 Connect the inlet and outlet pipelines.
5.2.4 Lower the drill bit (grinding shoe) to 5 meters above the top of the cement plug and start the pump for positive circulation. Start the power faucet after the circulation is normal. When the faucet speed is normal, slowly lower the drill bit, pressurize it to 7-15kN, control the speed at 40-60r/min, and the annulus return speed is not less than 0.8m/s. 5.3 Drilling cement plug with rotary table
5.3.1 The drilling tools are matched from bottom to top: drill bit (grinding shoe), drill rod, square drill rod. 5.3.2 Lower the drill bit.
5.3.3 Connect the inlet and outlet pipelines.
5.3.4 Lower the drill bit (grinding shoe) to 5 meters above the top of the cement plug and start the pump for positive circulation. Start the rotary table after the circulation is normal. After the turntable rotates normally, slowly lower the drill bit, pressurize it to 10-25kN, control the speed at 60-120r/min, and the annulus return speed is not less than 0.8m/s: 6 Quality control and safety requirements
6. 1 Quality control
6.1.1 The size of the downhole tool is accurate, the pipe string assembly is clear, and there are detailed records and schematic diagrams. 6.1.2 The pipe string thread must be coated with sealing grease, and the tightening must meet the requirements. 6.1.3 The speed of raising and lowering the drill bit is uniform and stable. 6.1.4 Before drilling the cement plug, ensure that there is no falling objects under the cement plug surface. 6.1.5 When using screw drilling tools, the workover fluid must be clean and free of impurities to meet the requirements of screw drilling. 6.1.6 Drill once every 3-5m of drilling.
The workover fluid must meet the requirements of protecting oil. 6.1.8 The casing must not be damaged during the operation. 6.1.9 After drilling through the cement plug or reaching the designed position, use a well gauge or scraper to drill to the designed depth, remove the residual cement on the well wall, and thoroughly wash it with a clean workover well of 1.2-1.5 times the volume of the wellbore. 6.2 Safety requirements
6.2.1 During the operation, there must be a dedicated person at the wellhead to direct and coordinate the work. 6.2.2 When the drilling tool is raised and lowered, the wellhead must be equipped with a control cover. —2
SY/T 55B7.1593
6.2.3 When the drilling tool is raised and lowered, the drilling must be stopped and a qualified weight indicator or tension gauge must be installed. 6.2.4 When there is no footage during drilling, the drilling should be stopped and the drill should be lifted to analyze the reasons and take appropriate measures. 6.2.5 When the sealed perforated well section below the drilled cement plug is a high-pressure layer, anti-blowout measures should be taken. 6.2.6 The upper water tank and the return water sedimentation tank should be used separately. 6.2.7 Before adding a single root, it must be fully circulated to prevent drill cuttings from getting stuck in the drill. 7 Operation quality requirements and inspection
7.1 Operation quality requirements
7.1.1 The final depth of the cement plug should meet the design requirements. 7.1.2 The casing should not be damaged during the operation.
7.1.3 The inner wall of the casing should be completely clean and free of cement rings. 7.1.4 The provisions of SY/T5587.3 must be strictly followed during the operation. 7.1.5 The operation data should be complete and accurate, and the specific items should comply with the provisions of Appendix B (Supplement). 7.2 Quality inspection
7.2.1 Quality inspection method
, use a well gauge that is 6 to 10 mm smaller than the inner diameter of the casing to check whether the casing is deformed, whether there is a cement ring on the inner wall of the casing, and whether the operation depth meets the design requirements!
b. Test the wellbore pressure and check whether the casing is damaged. 7.2.2 Operation summary
The summary format and content should comply with the provisions of Appendix C (Supplement). A1
Format size:
SY/T 5587.15-93
Appendix A
Format and content of drilling cement plug operation design
(Supplement)
Use 880mm×1230mm paper size 16-inch format, A2 format and content:
A2.1 Cover format:
Drilling cement plug operation design
Operation unit
A2.2 Content format:
, basic data
Completed well depth
Original artificial well bottom
Oil compensation distance
Cement plug
Well section,
Pressure coefficient
2. Purpose of drilling cement plug
3. Current downhole situation
4. Measures before drilling cement plug
5. Process design
SY/T 5587. 15—93
Entry depth
Cement return height
Well section: m
Pressure coefficient
Lifting equipment
Drilling equipment
Circulation equipment
Implementation period
VI. Operation procedures
1. Replace the wellhead control device and prepare for drilling. 2. Drilling and lowering belt
3. Use ㎡ density
4. Use m2 density
5. Pull out the pipe string in the well.
6. Lower the drilling tool in the following order:
SY/T 5587.15—93
Drill bit (grinding shoe)
Number, m
Density, g/cm2
Bit pressure, kN
Speed, r/min
Pump, MPa
Displacement, m/min
Annular penetration speed, m/s
Completion drilling depth, m
B/ctm\Well washing fluid
g/cm Well repair fluid
Circulate and wash the well.
Replace the wellbore with well washing fluid.
7. The drill bit (grinding shoe) is 5m away from the cement plug surface. 8. After the circulation is normal, the drill tool starts to rotate at a speed of 9. Ream once every
m of drilling,
10. Before adding a single root, it should be circulated for
min.
r/min, the ground shows normal. Lower the drilling tool and increase drilling pressure. 11. After the drilling depth reaches the design requirement, fully circulate and wash the well to replace the drill cuttings in the well. 12. Pull out the drill string in the well.
The density is
15. Pull out the pipe string in the well.
16 Replace the wellhead control device.
VII. Precautions
VIII. Material requirements and plans
g/em. Scrape the inner wall of the pipe through the well, and finally wash (press) the pipe string with sa fluid to replace the well repair fluid. IX. Special vehicle plan
X. Approval opinions
SY/T 5587. 15—93
Format size:
SY/T 5587.15
Appendix B
Drilling cement plug operation record
(supplement)
Use 880mm×1230mm paper 16K format. B2 Format and content:
1. Drilling cement plug operation record:
Oil layer casing
(shoe)
Inner diameter, mm
Depth, m
Specification, mm
Specification, m
Drilling pressure, kN
Displacement, m'/min
Speed, r/min
Le, MPa
2. Brief description of operation:
Workover fluid
Drilling depth
Completion depth
Drilling time, h
Circulation outlet inertia
C1 Format size:
SY/T 5587. 1593
Appendix C
Format and content of drilling cement plug construction summary
(supplement)
Use 880mm×1230mm paper in 16K format. C2 format and content:
C2.1 Cover format:
Construction summary of drilling and cement plug
Compiler
Reviewer
Construction unit
C2.2 Content format:
Basic data
Completed well depth
Oil compensation distance
Original plugging well section
Original production well section
Artificial bottoming
Designed drilling depth
Actual drilling depth
2. Purpose of drilling and cement plug
3. Main technical measures of construction design
4. Brief description of operation
5. Construction results
Additional instructions:
SY/T 5587.15—93
Cement plug
Inner diameter: mm
Density, g/cm2
Name of drilling and washing equipment
This standard is proposed and managed by the Oil and Gas Production Professional Standardization Committee. This standard is drafted by the Downhole Operation Company of the North China Petroleum Administration. Drafters of this standard: Deng Dexian, Chu Guangming. 10
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