SY/T 5587.16-1993 Procedures for routine well repair and casing scraping in oil and water wells
Some standard content:
Petroleum and Natural Gas Industry Standard of the People's Republic of China SY/T 5587.16-93
Routine well repair work for oil and water wells
Well cleaning and casing scraping operation procedures
1993-09-09 Issued
China National Petroleum Corporation
1994-03-01 Implementation
Topic content and scope of application
Petroleum and Natural Gas Industry Standard of the People's Republic of China Routine well repair work for oil and water wells
Well cleaning and casing scraping operation procedures
SY/T 5587,16--93
This standard specifies the preparation, design, operation procedures, quality control and safety requirements for well cleaning and casing scraping operations for oil (water) wells. This standard applies to vertical well cleaning and casing scraping operations. 2 Reference standards
SY/T558.6 Oil and water with gauge repair operation, oil pipe operation procedures $Y/T5587.7 Oil bearing well routine repair operation, well washing operation procedures 3 Terminology
3.1 Well cleaning
Use a cylindrical gauge with a specified outer diameter and length to directly check the inner diameter of the casing. 3.2 Casing scraping
Scrape the inner wall of the casing to remove water irrigation, hard wax, salt scale and blast hole burrs on the inner wall of the casing. 3.3 Traces
Traces shown after friction and impact with the opening of the casing. 4
Operation design
Write the operation design book according to the requirements of well cleaning and casing scraping operations. The content and format of the design book shall comply with the provisions of Appendix A (Supplement).
5 Operation preparation
5.1 Tool preparation
5.1.1 Select the well gauge according to the inner diameter of the reservoir casing. The specifications of the well gauge should comply with the provisions of Table 1. Table 1
Casing specifications
Well clearance regulations
Joint connection
Connecting thread
2°/aTBC
102~107
2\/TBG
Approved by Zhongwei Petroleum and Natural Gas Corporation on September 9, 1993138,70
114~118
21/8TBG
116~128
2'/:TBG
136~148
27/aTBG
144~158
$1/TBG
Implemented on March 1, 1994
SY/T 5587.16—93
5,1,2 Select the scraper according to the inner diameter of the oil layer casing. The scraper specifications should comply with the provisions of Table 2 and Table 3. Table 2 Rubber Cartridge Scraper
Scraper Model
GX-G114
GX-G127
GX-G140bzxz.net
GX-G146
GX-G168
GX-G178
Scraper Model
GX-T114
GX-T127
GX-T140
GX-T146|| tt||GX-T168
GX-T178
Cum column preparation
Overall dimensions
$112×1119
9119×1340
p129×1443
@133X1443
91561604
p166×1604
Overall dimensions
$112×1119||tt| |4119X1340
Φ129×1443
$133×1443
$156×1604
p166×1604
Connector connection burst
31/REG
3/2REG
2°/aTHG
24/,TRG
2T/:TBG
31/2TBG||tt| |3 spring scraper
Joint connection thread
2\/:TBG
2/5TBG
27/sTBG
23/:TBG
SI/TEG
31/TBG
Casing specifications for drilling
Casing specifications for drilling
Prepare the oil pipe (or drill pipe) according to the design requirements, and make measurements, calculations, pipe string, discharge and record. 5.5 Preparation for drilling
5.3.1 The casing used for drilling and repair should meet the requirements of protecting the oil layer and be prepared in sufficient quantity. The casing situation must be checked before drilling.
Operation procedures
6.1 Well drilling
The pipe string structure is from bottom to top, and the oil pipe (or drill pipe) is the drilling specification. 6.1.1
The lowering of the pipe string for merging shall comply with the provisions of SY/T5587.6. in
6.1.3 During merging, the operation shall be smooth, and the speed of the lower arm column shall be controlled to 10~20m/min. When the distance from the design position or the artificial merging bottom is 100m, the lowering speed shall not exceed 5~～10m/min. When the hanging weight drops 10~20kN to the artificial merging bottom, repeat twice, so that the error of the measured artificial merging bottom depth is less than 0.5m.
6.1.4 During merging, if there is an obstacle in the middle, the hanging weight shall be controlled to drop no more than 20~30kN, and the pipe string shall be moved smoothly, and the circulation shall be flushed. Climbing and hard pressing are strictly prohibited.
6.1.5 For the merging section that encounters an obstacle, the situation shall be analyzed or the cause of the obstacle shall be confirmed by actual measurement and printing, and the merging operation shall be carried out after repair. 6.2 Scraping of the pipe
SY/T 5587.16--93
6,2.1 The structure of the general column from bottom to top is scraper, tubing (or drill pipe). 6.2.2 The scraping of the casing column should comply with the provisions of SY/T5687.6. 6.2.3 When lowering the pipe column, the operation should be smooth, and the speed of lowering the pipe column should be controlled at 20-30m/min. The lowering speed should be controlled at 5-10m/min when the distance design requires the scraping section to be about 50m before the section is scraped. When the pump circulation is normal, slowly lower the pipe column while rotating it in the direction of the thread tightening, and then lift the pipe column to scrape it repeatedly until the lowered hanging weight no longer drops. 6.2.4 If there is a blockage in the middle, when the suspension drops by 20~~30kN, stop lowering the pipe string, connect the well manifold, lower the pipe string while rotating in the direction of the threaded fastening, and scrape repeatedly until the hanging weight of the pipe string returns to normal, and then continue to lower the pipe string. 6.2.5 After the scraper operation is completed, it should be fully cleaned according to the provisions of SY/T5587.7. 7 Operation quality and safety requirements
7.1 Operation quality
The lifting and scraping of the casing operations meet the design requirements, and the inner diameter of the casing in the well is unobstructed. 7.1.2
After scraping, wash thoroughly, and the scraped dirt should be fully washed out of the ground. The data collection is complete and accurate, including: the model of the well-drilling gauge (scraper), the external dimensions: the depth of the well diameter (or the cutting casing), the position of the obstruction, the change value of the weight gauge, the description of the well-drilling gauge trace, the washing and lifting time, the amount of washing fluid, the pump pressure, the washing depth, the displacement, and the description of the return material at the outlet.
The format and content of the well-drilling and scraping casing operation record shall comply with the provisions of Appendix B (Supplementary). 7, 1.5 The format and content of the summary of the well-drilling and scraping casing operation shall comply with the provisions of Appendix C (Supplementary). 7.2 Safety requirements
A weight gauge (or dynamometer) and a well-drilling control device that have been calibrated and meet the requirements must be installed during the operation. 7.2.2
The well-drilling and scraping workers and the pipe string shall be qualified by ground inspection. 7.2.31
During the well-drilling and scraping process, the change of the hanging weight must be mastered, and the hanging weight drop must be controlled not to exceed 30kN. 7.2.4 It is strictly forbidden to use the pipe string with a dredging gauge or scraper to flush the sand. A1 Format Size
SY/T 5587,16--93
Appendix A
Content and format of the design book for dredging and scraping casing (supplementary document)
Use 880mm×1230mm paper size 16K format. A2 Content and Format
A2.1 Cover Format
Design of dredging and scraping casing
Operation Unit
A.2,2Content format
Basic data
Oil cloud casing
Human second cancer, m
Shechuan layer
Oil and brief situation
Static pressure, MPa
Pressure coefficient
And inner pipe
III. Integrity of oil display casing and previous operations IV. Well clearing and scraping casing
Pre-operation measures
Design parameters
Well clearing depth, m
Cutting depth, III
V. Operation steps
Name of well killing fluid
mi n、Pump pressure
Replacement and control device
SY/T5587.16—93
Completion of drilling and depth
Cement return depth, m
Oil compensation distance, m
Injection and Yin, m
g/cm\，Quantity
MPa、Displacement
，t/d
Gas, m\/d
Water, m\/d
m\，Well killing method
，Depth
Pulling out the original well string
min，Number base
SY/T 5587.16--93
Introducing the pipe string for clearing or scraping (from the bottom to the top) Clearing gauge (or scraper) length
Clearing (scraping)
Clearing gauge
Scraper model
Washing method
m, oil pipe (or drill pipe)
mm, clearing depth to
Secondary cutting depth to
m\/min.Time
VI. Equipment and material plan||t t||Well clearing equipment
Well control device
VII. Approval opinion
Maximum quantity
Well lifting fluid, density
min, return material
g/cm*, well washing depth
Well clearing and scraping
(scraper)
Well repairing fluid
Drill pipe or tubing
.m, pump pressure.MPa, drainage
Format size
SY/T 5587:16--93
Appendix B
Well clearing and scraping casing operation record
(supplement)
Use 880mm×1230mm paper 1.6 open format. Content and format
Comprehensive, scraping casing operation record
Operation recognition
Oil layer clearing pipe
Comprehensive specification
(or auxiliary Kai device)
Comprehensive time
Washing method
Operation summary
Salvage training
Density: g/cm
Number of gains, ㎡a
Washing depth change, m
Recorder
Surface size
sY/T 5587,16--93
Attached scene C
Comprehensive. Casing scraping operation summary content and format (filler)
Use 8B0mm×1230mm specification paper 16 open format. C2 Content and format
C2.1 Cover format
General and special inspection and pipe operation summary
Operation unit
C2.2 Content format
I. Basic data
Oil layer casing
Artificial well corrosion, m
Perforation layer
II. Purpose
III. Brief description of operation
IV. Conclusion and construction
Additional instructions:
SY/T5587.16--93
Complete drilling and deep drilling, benefit
Cement return depth, III
Oil compensation distance,
Perforation and section, m
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 Bureau. The main drafter of this standard is Chen Dianxiong.
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