SY/T 5587.11-1993 Drilling and milling process of drillable packers for conventional well repair in oil and water wellsSY/T5587.11-1993 Standard download decompression password: www.bzxz.net

Petroleum and Natural Gas Industry Standard of the People's Republic of China SY/T 5587.11—93
Oil and water combined routine workover operations
Drillable packer drilling and milling process practices
1993-03-27 Issued
Ministry of Energy of the People's Republic of China
Implementation on 1993-09-01
1 Subject content and scope of application
Petroleum and Natural Gas Industry Standard of the People's Republic of China Oil and water combined routine workover operations
Drillable packer drilling and milling process practices
SY/T 5587.11—93
This standard specifies the construction design, construction preparation, operation procedures, quality control and safety requirements in the process of drilling and milling drillable packers in oil, gas and water wells.
This standard applies to the drilling and milling construction of drillable packers for Φ177.8mm casings. The drilling and milling construction of drillable packers of other specifications can also be implemented as a reference.
2 Terminology
2.1 Casing method
Drilling and milling of drillable packers using a casing milling shoe with a fishing device. Applicable to drilling and milling construction that requires the removal of packer remnants and lower structures.
2.2 Casing method
Drilling and milling of drillable packers using a casing milling shoe without a fishing device. Applicable to drilling and milling construction that does not require the removal of packer remnants. 2.3 Drilling method
Drilling and milling of drillable packers using other tools. Applicable to drilling and milling construction that does not require the removal of packer remnants. 3 Construction design
The construction design shall comply with the provisions of Appendix A (Supplement). 4 Construction preparation
4.1 Preparation of drilling and milling pipe
a: Drill pipe or Φ73mm (27/8in) external thickened oil pipe, drill chain (mass must be greater than 2t) and matching joints) b. Milling shoes can be selected, such as sleeve milling shoes, roller drill bits, concave milling shoes, flat-bottomed milling shoes, etc. 4.2 Preparation of special tools and equipment on the ground
a, the parallel port must have a safe parallel control device, b, there must be a calibrated and qualified tension gauge (weight gauge) and pressure gauge. 4.3 Selection of well killing fluid and well killing method
Select well killing fluid and well killing method according to the parallel conditions. 5 Operation procedurewwW.bzxz.Net
Before drilling and milling, the accurate sealing position of the packer and the lower structure of the packer must be clear. 5.1 Casing method
5.1.1 See Figure 1 for the schematic diagram of the pipe string structure.
5.1.2 The initial drilling pressure on the packer can be carried out according to the following steps. Approved by the Ministry of Energy of the People's Republic of China on March 27, 1993 and implemented on September 1, 1993
SY/T 5587.11-93
51.2.1 Slowly lower the pipe string to make the packer bear 10~20kN drilling pressure. At this time, mark the pipe string. Lift the pipe string so that the grinding shoe or drill bit is 1~2m away from the packer
5.1.2.2 Rotate the pipe string at a speed of 60~~100r/min, and slowly lower the pipe and start circulation at the same time. The circulating fluid return speed must be above 0.8m/s.
.5.1.2.3 It takes about 15 minutes to gradually make the packer bear 10~~20kN drilling pressure. The torque shall not exceed the torsional servo limit of the weakest part of the drill string.
5.1.3 Drill and mill at a drilling pressure of 10~~20kN until the packer is freed from constraints. 5.1.4 Slowly lift the tubing string, pay close attention to the changes in the weight gauge, and slowly lift it when encountering resistance to remove the remaining packer. .5.2 Milling method
5.2.1 See Figure 2 for a schematic diagram of the tubing string structure.
5.2.2 See 5.1.2 for the initial drilling pressure on the packer. 15.2.3 See 5.1.3 for drilling and milling of the packer. 5.2.4 After the packer is freed from constraints, push its remaining part to the artificial bottom. When no fish is allowed to be left at the bottom of the well, continue drilling and milling. If drilling and milling cannot remove it, lower the salvage tool to drop the fish and pull it dry. Oo
Figure 1 Milling shoe with salvage device
Schematic diagram of pipe structure
1 Drill string: 2-Debris scoop basket, 3-Milling shoe: 4-Salvage device
5.3 Drilling method
5.3.1 The initial drilling pressure on the packer can be carried out according to the following steps. Figure 2 Milling shoe without salvage device
Schematic diagram of pipe string structure
1-Drill fence: 2-Debris scoop basket; 3-Milling shoe 5.3.1.1 Slowly lower the pipe string to make the packer withstand 20~40kN drilling pressure. At this time, mark the pipe string and lift the pipe string to its own weight. 5.3.1.2 Same as 5,1.2.2.
5.3.1.3 It takes about 15 minutes to make the packer withstand 20~~40kN drilling pressure. 5.3.2 Milling shall be performed under a drilling pressure of 20~~40N. 5.3.3 Same as 5.2.4.
6 Quality control and safety requirements
6.1 Quality control
SY/T 5587.11—93
6.1.1 When there is fish on the upper part of the drillable packer, the fish must be salvaged. 6.1.2 When there are drillable tools on the lower part of the packer and they all need to be drilled and milled out, the upper packer can be released and pushed to the top of the next tool without large drilling pressure, and drilling and milling can be continued until the drilling and milling purpose is achieved. When drilling and milling cannot be removed, the remaining packer must be salvaged cleanly, and then other drillable tools can be drilled and milled.
6.1.3 The performance of the repair fluid is based on the principle of no spraying, no leakage, no damage to the oil layer, and strong carrying capacity. 6.1.4 The design date and requirements must be met after the operation. 6.1.5 All the data recorded in the construction summary must be complete, accurate and accurate. The construction summary should comply with the provisions of Appendix B (Supplement). 6.2 Safety requirements
6.2.1 If it is necessary to start drilling for some reason, the repair fluid must be circulated for more than one week. 6.2.2 If there is no footage during drilling and milling, the drilling pressure must not be increased blindly to avoid damaging the casing. 6.2.3 When drilling and milling, the operation must be carried out according to the instructions of the drilling and milling tools used. 3:
Design document format
SY/T5587.11--93
Appendix A
Drillable Packer Drilling and Milling
Design document
(Supplement)
Design document format size, 260mm×187mm. Content format of design book
Drillable packer drilling and milling design book
Basic data
Basic data of well
Casing specification
Casing integrity
Current fish top position
Model and name of drillable packer
Lower structure of packer
Fishing situation on packer
II. Construction purpose and requirements
III. Preparation of tools and materials
IV. Construction step design
Year, month, day
Casing compensation distance
Artificial bottom closure a month ago
Oil compensation distance
Middle depth of oil layer
Drilling depth
Liquid production
Person filling out the form:
Reviewer!
Thickness of Bohai layer
Oil-gas ratio
B1Construction summary format
SY/T 5587.11--93
Attachment B
Drillable packer drilling and milling
Construction summary
(Supplement)
Construction summary format size, 260mm×187mm. B2Construction summary cover format
Construction summary
Drillable packer drilling and milling
Construction summary content format
I. Basic data
And basic data
Casing specification
Integrity of Gong pipe
Current fish top position
Estimable packer type and name
Packer lower structure
Packer Fishing situation at the top
2. Construction brief
Construction date
Drilling and milling pipe string
Drilling time
And downstream angle condition
Three front artificial well bottom
3. Brief description of drilling and milling process
4. Conclusion
Construction unit
Application unit signature:
Pure drilling time
SY/T 5587.11—93
Casing compensation distance
Target upper non-bottom
Oil compensation distance
Middle depth of oil layer
Study drilling and depth
Production prospect
Construction unit signature
Form filler:
Reviewer;
Oil layer original depth
Oil-gas ratio
Additional instructions:
$Y/T 5587.11--93
This standard is proposed and managed by the Oil and Gas Production Professional Standardization Committee. This standard is drafted by the Oilfield Technology Research Institute of the New Petroleum Administration Bureau. The main drafters of this standard are Tian Xiangming and Wang Jun.
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