SY/T 5271-2000 Determination of the sticking point and explosive loosening methodSY/T5271-2000 standard download decompression password: www.bzxz.net

ICS 75.180,99
Registration number: 8141—2001
Petroleum and natural gas industry standard of the People's Republic of China SY/T 5271—2000
Instructions on free point indicatingand backing-off with shooting2000-12-12 Issued
State Administration of Petroleum and Chemical Industry
2001 06-01 Implementation
SY/T 5271—200
Reference Standard
Preliminary determination of the depth of the stuck point by calculation formula
Determination of the depth of the stuck point by using a card measuring instrument
5 Explosive loosening
Appendix A (Standard Appendix)
Appendix (Standard Appendix)
Appendix C (Suggestive Appendix)
Relationship between the reading of the card measuring instrument and the tension of the free pipe string when pulling the card measuring instrumentRelationship between the reading of the card measuring instrument and the rotation circle of the free drilling tool when rotating the cardSelection of the number of detonating cords
SY/T 5271—2000
This standard is a revision of SY5271-91 "Determination of Stuck Points and Explosive Loosening Methods". This standard replaces SY5271-91 from the date of its entry into force. The appendix A and appendix B of this standard are both standard appendices. The appendix C of this standard is a suggestive appendix.
This standard is proposed by China National Petroleum Corporation. This standard is promoted by the Petroleum Drilling Engineering Professional Standardization Committee. The drafting unit of this standard: Dagang Oilfield Group Drilling Engineering Co., Ltd. The main drafters of this standard are Dan Lian, Gao Zhenwu, Kong Fan, Zhang Zhongzhi, Gao Xuesheng, Chen Jianhua, and Hao Junqin. This standard was first issued in July 1991, and this is the first revision. 1 Scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Instructions on Free point indicating and backing-off with shootingSY/T 5271—2000
Replaces SY 5271—91
This standard specifies the methods and precautions for determining the stuck point and backing-off with shooting in oil and natural gas drilling and workover. This standard is applicable to pipe string carding and backing-off operations in oil and natural gas drilling and workover. 2 Reference standards
The clauses contained in the following references constitute the clauses of this standard by citing them in this standard. When this standard is revised, the versions shown are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards: GB2702-1990 Explosives Safe
3 Preliminary determination of the depth of the stuck point by calculation formula
L = 263.8WE
Where: L—preliminary determination of the depth of the stuck point, m; W—weight of the pipe string with joints (hoops) per meter, kg/m; E—average elongation of the pin when it is continuously lifted, cm; ,—average tensile force of the drilling tool when it is continuously lifted, kN. 4 Determine the depth of the stuck point by using the card measuring instrument
4.1 Preparations before measurement
4.1.1 After the card measuring personnel arrive and complete the work, the following conditions should be recorded: a) Measure the depth and the highest well temperature:
b! Drilling fluid performance and formation pressure coefficient: 1) Wellbore structure, release the stuck drilling tool assembly; 2) Inclination data and geological stratification; 3) Treatment before drilling: 4.1.2 Use a heavy machine to check whether there is any foreign matter blocking the inner diameter channel in the pipe, and select different equipment based on different openings: a) Simple lifting equipment installation see Figure 1 6] General metering equipment installation see Figure 2: 7) High-quality equipment installation see Figure 3. 8) 9) 10) 11) 12) 13) 14) 15) 16) 17) 18) 19) 19) 10) 11) 12) 13) 14) 15) 16) 17) 18) 19) 19) 10) 11) 12) 12) 13) 14) 15) 16) 17) 18) 19) 19) 11) 12) 12) 13) 14) 15) 16) 17) 18) 19) 19) 11) 12) 12) 13) 14) 15) 16) 17) 18) 19) 19) 11) 12) 12) 12) 13) 14 ...4) 14) 15) 16) 14) 15) 16) 14) 15) 16) 14) 15) 16) 16) 17) 18) 19) 19) 11) 12 Implementation
Company Name
Number of turns/1000m
SY/T5271-2000
1-cable; 2-manual blowout preventer: 3-short drill pipe: 4-stuck drill tool; 5-turntableFigure 1 Schematic diagram of wellhead equipment installation for a simple well
1-cable: 2-manual blowout preventer: 3-short drill pipe: 4-rotating head: 5-stuck drill tool: 6-turntableFigure 2 Schematic diagram of wellhead equipment installation for a general well
【—cable: 2—hydraulic blowout prevention box: 3 short drill pipe: 4-blowout prevention pipe: 5-cock 6 bypass circulation joint: 7-rotating head: 8-stuck drill bit; 9-turntable Figure 3 Schematic diagram of wellhead equipment installation in high-pressure wells
Table 1 Pipe string fastening data
2%-3/4
4.1.6 Combination of downhole card detection instruments (different combinations are selected according to different conditions): a) The combination of easy-to-downhole card detection instruments is shown in Figure 4. b) The combination of difficult-to-downhole card detection instruments is shown in Figure 54.1.7 Selection of long and short spring anchors:
a) The inner diameter range of the pipe string applicable to the long spring anchor is 38~254mm; b) The inner diameter range of the pipe string applicable to the short spring anchor is 38120mm. Drill chain
SY/T5271—2000
1-cable: 2-cable head; 3-magnetic positioning; 4-weighted rod column; 5-oscillator: 6-upper spring bed 7-sensor: 8-lower spring anchor; 9-guide shoeFigure 4 Schematic diagram of the combination of the easy-to-go-down well card detection instrument1-cable; 2-cable head; 3-magnetic positioning; 4-weighted rod column; 5-telescopic rod: 6-oscillator; 7-upper spring anchor: 8-sensor; 9-lower spring anchor: 10-guide shoeFigure 5 Schematic diagram of the combination of the difficult-to-go-down well card detection instrument10
4.1.8 Verification of ground instruments: At present, the card detection instruments of several manufacturers such as Homco, ICT and AES are used in China. The method of verifying ground instruments should be operated according to the regulations of each manufacturer.
4.2 Downhole card detection instrument
4.2.1 Assemble the downhole card detection instrument on the drilling platform. 4.2.2 Align the magnetic locator with the turntable plane and adjust the depth gauge to "0". 4.2.3 Turn on the power switch.
Lower the card measuring instrument and install the parallel port blowout prevention box. 4.2.4
4.3 Determine the depth of the stuck point with the card measuring instrument
4.3.1 Selection of card measuring method:
a) For stuck drill pipes in tubing, casing and bent drill pipe, use the pulling method to measure the stuck point: b) For stuck drill pipes of other properties, use the rotation method to measure the stuck point. 4.3.2 The first step of measurement is to select the free pipe string. According to the card measuring method adopted, rotate (or pull) the pipe string according to the values ​​in Table 2 or Appendix A (Standard Appendix). 4.3.3
The second step of measurement is to select the stuck point depth calculated by the formula. Record each step of measurement.
Table 2 The number of turns required to rotate the card measuring
Name of pipe string
Number of turns/1000m
Fill in the card measuring record (see Table 3) and archive it. 4.3.6
4.3.7 According to Appendix A (Standard Appendix) or Appendix B (Standard Appendix), analyze whether the data in Table 3 is consistent with the card reading corresponding to the pipe string.
4.3.8 According to the data in Table 3, draw a curve to determine the stuck point and select the explosive release well depth (see Figure 6). 4.3.9 Determine the stuck point depth (third inflection point ③) from Figure 6. 4.4 Precautions for operating the card instrument
4.4.1 It is forbidden to apply torque to the drill bit by winding the wire rope with the elevator. 4.4.2 The speed of lowering the instrument shall not exceed 3500m/h. 3
Drilling combination
Drilling fluid performance
Instrument cooperation
Instrument captain
Well equipment
Card measuring operator:
Card measuring and depth
SY/T 5271--2000
Table 3 Card measuring record
[Lifting weight
Lifting speed is reduced to less than 3000m/h
Number of positive rotation circles
Reading grid
Lifting instrument invitation card, the maximum lifting tension does not exceed the safe load of the cable head, 5 Explosive loosening
Determination of explosive loosening position
The explosive loosening position is selected above the stuck point (the first turning point in Figure 7) from the pipe string: 5.2 Preparation before explosive loosening
5.2.1 Selection of explosive rod:
a) In general, the length of the explosive rod is 1.7m and the diameter is 11mr; 6) For special drilling conditions or unconventional operations, the selection should be based on the specific situation. 5.2.2 Instrument set price (see Figure 7)
Maximum well deviation
Number of return diagrams
5.2.3 Calibration of the explosive instrument: The calibration method of the explosive instrument should be carried out according to the blasting operation procedures provided by each manufacturer 5.2.4 Detonator performance see Table 4
Table 4 Flute tube performance
Ignition current
103.4MPa(160/1h)
[7utAh
135/24h
Recorder:
Drilling tool indication point break
SY/T 5271—2H0
Card curve
Instrument reading
Card point degree
1-Drilling: 2-Drilling chain: 3-Drill bit
Figure 6 Determine the card point and select the explosion release depth curve 4
Restraint depth
---Core cable: 2-Cable head: 3, Magnetic locator: Section column: 5 Explosion safety joint: 6-Explosion rod (or check double device firecrackers enough indicator light two shift shoes figure and instrument correction
5.,2,5 Front pipe chief inspection of dangerous pipe waiting for good environment
3.2.6 The performance of detonating cord is shown in Table 5
5.2.7 The selection of the number of detonating cords is shown in Appendix (. (Prompt Yin Huan ) 5.2.8 Assembly of blasting rod and detonating cord
2.8. Connect one end of the ignition wire of the twisted tube to the "pigtail" outlet of the explosion safety joint, and then connect it to the explosive 5.2.8.2 Wrap the two terminals of the tube with high-pressure tape and waterproof tape: 5.2.8.3 Wrap the two ends of the detonating cord with high-pressure tape and waterproof tape 5.2.8.4 Place the detonating cord parallel and evenly on the entire blasting rod. It is strictly forbidden to wrap it blindly (special and exception): s.2.8.5 Wrap the entire condensing rod with insulating cloth, and make anti-wear rings every 30cm. 5.2.8.6 Measure the length from the magnetic positioner point to the condensing point, and record it as equal length. Explosive name
5. 3 Downhole operation
SY/T5271—2000
Table 5 Detonating cord performance
RDX
6400~7500
5.3.1 Align the magnetic positioner with the turntable plane and adjust the depth gauge to "0"5.3.2 Lower the explosive instrument and install the wellhead blowout preventer. 5.3.3 After the explosive instrument is lowered to 100m, turn on the power. 5.3.4 Lower the explosive instrument to the predetermined explosive release position. Temperature resistance
Unit length
Explosive content
g/m (gr/ft)）
5.3.5 Lift the pipe string so that the hanging weight is equal to the tons of the neutral point of the drill string at the release position 5.3.6 Apply counter torque to the pipe string according to the data in Table 6. Table 6 Explosive loosening counter torque turns
Pipe string name
Number of turns/1000m
3 years-4
1%-2 yuan
13%-2%
5.3.7 Slowly lift the explosive instrument, and when the midpoint of the explosive rod is aligned with the pipe string coupling, ignite the joint immediately. 5.3.8 Pull out the explosive instrument from the well.
5.3.9 Lift the pipe string and record the hanging weight.
5.3.10 Fill in the explosive loosening record (see Table 7). 5.4 Explosive loosening precautions
5.4.1 Detonators and detonating cords are shipped separately.
5.4.2 Explosive loosening operations are prohibited on rainy days and at night. 5.4.3 After disconnecting all battery live wires and ground wires, the static voltage between the instrument vehicle housing and the earth is less than ±6V. It is forbidden to use a multimeter or megohmmeter to measure the resistance of detonators. 5.4.4
It is forbidden to use the explosion safety joint when the forward resistance of the diode is less than 15kΩ. 5.4.5
The insulation between the cable sheath and the cable core should be greater than 50MQ ground wire during explosion release.
The speed of lowering the explosion release instrument shall not exceed 3000m/h. 210t/1h
175℃24h
21.3(100)
Explosives should be transported in a safe and kept by a special person. The safe should comply with the provisions of GB2702. 5.4.9
Workers engaged in explosive loosening shall wear anti-static clothing, undergo professional safety and technical training, and hold special operation certificates. 5.4.10
They shall be responsible for the use and supervision of dangerous goods. 5.4.11
Detonating cords and electric detonators must use special anti-static pliers and tools. When packaging detonators and detonating cords, radio communication tools must be turned off. Measure the depth of the stuck point
Instrument combination
Number of reverse turns
Lifting weight
Model and quantity of detonating cord
Remarks:
SY/T5271—2000
Table 7 Explosion loosening record
Company well number:
Loosening depth
Number of tight turns
Detonator model
Number of reverse turns after detonation||tt| |Wellbore structure and drilling tool assembly
SY/F5271—2000
Appendix A
(Standard Appendix)
When pulling the card, the relationship between the card reading and the tension of the free pipe string A1
When using a short spring anchor, the relationship between the card reading and the tension of the free drill chain is shown in Figure A1A2
When using a short spring anchor, the relationship between the card reading and the tension of the free drill chain or drill pipe is shown in Figure A2. When using a long spring anchor, the relationship between the card reading and the tension of the user drill pipe or oil pipe is shown in Figure A3. When using a long spring anchor, the relationship between the card reading and the tension of the self-casing is shown in Figure A4. A4
SY/T 5271—20005
The insulation between the cable sheath and the cable core should be greater than 50MQ. Grounding wire during explosive release.
The speed of lowering the explosive release instrument shall not exceed 3000m/h. 210t/1h
175℃24h
21.3(100)
Explosives should be transported in a safe and kept by a dedicated person. The safe should comply with the provisions of GB2702. 5.4.9
The explosive release operator should wear anti-static clothing, undergo professional safety and technical training, and hold a special operation certificate. 5.4.10
Have the responsibility for the use and supervision of dangerous goods. 5.4.11
Special anti-static pliers and tools must be used for detonating cords and electric detonators. When packing detonators and detonating cords, radio communication tools must be turned off. Measure the depth of the stuck point
Instrument combination
Number of reverse turns
Lifting weight
Model and quantity of detonating cord
Remarks:
SY/T5271—2000
Table 7 Explosion loosening record
Company well number:
Loosening depth
Number of tight turns
Detonator model
Number of reverse turns after detonation||tt| |Wellbore structure and drilling tool assembly
SY/F5271—2000
Appendix A
(Standard Appendix)
When pulling the card, the relationship between the card reading and the tension of the free pipe string A1
When using a short spring anchor, the relationship between the card reading and the tension of the free drill chain is shown in Figure A1A2
When using a short spring anchor, the relationship between the card reading and the tension of the free drill chain or drill pipe is shown in Figure A2. When using a long spring anchor, the relationship between the card reading and the tension of the user drill pipe or oil pipe is shown in Figure A3. When using a long spring anchor, the relationship between the card reading and the tension of the self-casing is shown in Figure A4. A4
SY/T 5271—20005
The insulation between the cable sheath and the cable core should be greater than 50MQ. Grounding wire during explosive release. bzxz.net
The speed of lowering the explosive release instrument shall not exceed 3000m/h. 210t/1h
175℃24h
21.3(100)
Explosives should be transported in a safe and kept by a dedicated person. The safe should comply with the provisions of GB2702. 5.4.9
The explosive release operator should wear anti-static clothing, undergo professional safety and technical training, and hold a special operation certificate. 5.4.10
Have the responsibility for the use and supervision of dangerous goods. 5.4.11
Special anti-static pliers and tools must be used for detonating cords and electric detonators. When packing detonators and detonating cords, radio communication tools must be turned off. Measure the depth of the stuck point
Instrument combination
Number of reverse turns
Lifting weight
Model and quantity of detonating cord
Remarks:
SY/T5271—2000
Table 7 Explosion loosening record
Company well number:
Loosening depth
Number of tight turns
Detonator model
Number of reverse turns after detonation||tt| |Wellbore structure and drilling tool assembly
SY/F5271—2000
Appendix A
(Standard Appendix)
When pulling the card, the relationship between the card reading and the tension of the free pipe string A1
When using a short spring anchor, the relationship between the card reading and the tension of the free drill chain is shown in Figure A1A2
When using a short spring anchor, the relationship between the card reading and the tension of the free drill chain or drill pipe is shown in Figure A2. When using a long spring anchor, the relationship between the card reading and the tension of the user drill pipe or oil pipe is shown in Figure A3. When using a long spring anchor, the relationship between the card reading and the tension of the self-casing is shown in Figure A4. A4
SY/T 5271—2000
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