Some standard content:
Petroleum and Natural Gas Industry Standard of the People's Republic of China SY 5410--91
Operation Procedures for Drilling Jars
Published on January 15, 1992
Ministry of Energy of the People's Republic of China
Implemented on July 1, 1992
1 Subject Content and Applicable Scope
Operation Procedures for Drilling Jars of the Petroleum and Natural Gas Industry of the People's Republic of China
SY 5410-91
This standard specifies the scope of use, inspection, drill string assembly, operation methods, maintenance and precautions of ground drill jars, ground drill jars, closed drill jars, mechanical drill jars, hydraulic drill jars, super drill jars, drill accelerators and drill jars. This standard is applicable to various drilling operations such as drilling and drilling. Other drilling operations can also be used as a reference. 2 Reference standards
SY5086 Hydraulic upper impactor and impact acceleratorSY5055
5XJ-K type ground impactor
SY5054X.I-. type open impactor
Closed impactor
SY 5213
SY 5082 1
Drilling impactor
Ground impactor
3. 1 Scope of use
3.1.1 Applicable to the treatment of drill bit stuck accidents such as keyway, reduced diameter, block drop, sticking and suction, which require downward impact. 3.1.2 Release and salvage it.
3.1.3 In general, the depth of the stuck point is 700~26001m and is used in sections. 3.2 Inspection before use
3.2.1 Select the model according to the specification series in Table 1 of SY5055. 3.2.2 Check the tightness of the connecting threads of each component, the integrity of the threads at both ends and the shoulders, and the water limit should be unobstructed. 3.2.3 Check the product certificate and the original shock force mark of the product. Remove the lock nail and turn the adjustment ring to the maximum extent (remember the number of grids to turn) in the low shock force (counterclockwise) direction. When the hexagonal center tube stroke is raised, it should meet the requirements of SY5055. 3.3 Drill string assembly
3.3.1 Put the inner drill string and the ground hammer on the square drill rod (or drill rod). 3.3.2 After the ground hammer is connected, the position of the adjustment ring should be 0.5~~1.5m above the turntable surface. 3.4 Preparation before shock
When using the square drill rod, remove the lifting ring before shocking, pneumatically drive the power machine, and tie the big hook tongue to the cow. 3.4.1
When using drill pipe, the lifting ring and clamp are tied firmly. 3.4.2
Tighten the crown block cover.
The winch wire rope is arranged neatly.
The connection threads of the drill bit above the turntable surface are tightened. 3.4.5
3.4.6 The sensitivity of the weight indicator meets the specified requirements. 3.5 Operation method
Approved by the Ministry of Energy of the People's Republic of China on January 15, 1992 and implemented on July 1, 1992
3.5.1 Shock operation
SY5470--91
3.5.1.1 Calculate the sensitivity of the drill string above the clamping point in the drilling fluid and mark it on the weight indicator. 3.5.1.2 When the stroke is closed, adjust the direction of the high impact force (along the needle) between the adjustment rings to the required force. 3.5.1.3 Lift the drill string, and immediately start the pumping machine after lifting to complete one shock. 3.5.1.4 Lower the drill string and close the manual stroke, that is, close the ground hammer. Lift it again, and repeat this process to complete multiple shocks. 3.5.1.5 Adjust the shock force from small to large, and the maximum shock force shall not be greater than the hanging weight above the stuck point. It is not allowed to adjust to a high shock force at one time.
3.5.1.6 Each time it is adjusted, it must be positioned with a locking pin. Shock multiple times and adjust again depending on the effect. At the same time, add a little lubricating oil to the adjustment tool.
3.5.1.7 When multiple shocks are made, check that the cylinder temperature rises to a scorching temperature or the shock force changes automatically, and stop the operation. 3.5.1.8 Lift the drill string at the lowest speed. 3.5.2 Release the internal salvage tool
3.5.2.1 Use a slip-type tool to salvage the corner. When the suspended weight of the salvage drill string cannot be released or the release structure of the salvage tool fails, the ground hammer can be connected.
3.5.2.2 Adjust the shock force to a medium level for shocking. 3.6 Attention items
During the shocking process, pay attention to check the fastening of the derrick, swimming system and other key parts. 5.6.11
3.6.2 Prevent the hand tool from falling into the wellhead during operation. During the shocking operation, the command and operation personnel should do a good job of safety protection, and other personnel should stay away from the drilling platform. 3.6.3
3.6.4 When the ground hammer does not work properly, the cause should be analyzed in time and the fault should be eliminated. Otherwise, it should not be used. 3.7 On-site maintenance
3.7.1 If the cylinder is found to be hot during the shocking operation, reset the ground hammer, inject clean engine oil from the lock nail hole, and lubricate it coldly. 3.7.2 After use, reset the ground hammer, remove it from the drill string, place it in the drilling platform steadily, and clean the body. Especially for the hexagonal center tube that cannot be closed and exposed, apply oil and shrink the rope for protection. 3.7.3 Wear the wire guard to prevent collision and place it flat in a ventilated and dry place. 3.7.4 If drilling fluid is found in the adjustment ring, it needs to be sent back to the factory (station) for inspection and repair. 4 Open hammer
4. 1 Use range
4.1.1 It is suitable for the keyway, mud bag, fallen objects, sedimentation and sticking suction of deep wells and medium-deep wells, which need to be shocked downward. 4.1.21
Release the salvage tool.
4.1.3 Use with the cutting tool.
4.2 Inspection before use
Select the specification series according to Table 1 in SY5054.
Check the upper joint, the connection threads of the joint and the lower joint are tight to the same degree, and the water limit should be unobstructed. 4.2.2
The jar rod should slide flexibly.
4.2.4 The armpit holes should be unobstructed.
4.3 Drill string assembly
4.3.1 Salvage tool + safety joint + open down device + drill chain (25~60m) + drill pipe. 4.3.2 Internal cutter + drill pipe (cut length) + open down device + drill pipe. 4.4 Preparation before jarring
Same as 3.4.3~3.4.6.
4.5 Operation method
4.5.1 Internal down device
4.5.1.1 Before jarring, use the rotary table surface as the base point and make marks on the square drill pipe when the open down device is closed and pulled open, that is, the free stroke. 4.5.1.2 Record the weight of the drill string above the fish top in the drilling fluid. 4.5.1.3 Lift the drill string to the pull-out mark, that is, hit the free stroke. 4.5.1.4 Quickly lower the drill string to the closing mark of the open down hammer and hit the stuck point. 4.5.1.5 Repeat 4.5.1.3~4.5.1.4 to complete multiple down hammers. 4.5.2. Release and carry the fish
4.5.2.1 When the slip-type fishing tool cannot release the fish, use the open down hammer to perform the release operation. 4.5.2.2 When releasing the fish, lift the drill string.L to 1/4~1/3 of the free stroke of the open down hammer, immediately lower the drill string, and brake immediately when the self-exit stroke is closed.
4.5.2.3 When releasing the wellhead, connect 2~3 drill pipes on the upper part of the open hammer, pull the hammer apart slightly, place a large tank with a handle between the two impact surfaces, loosen the lifting card, and suddenly pull out the sledgehammer. 4.5.3 Cooperating with cutting tools
4.5.3.1 Pull the open hammer apart by 127~~254mm. 4.5.3.2 The drilling pressure is the hanging weight of the drill string connected below the open hammer. 4.6 Precautions
4.6.1 Same as 3.6.1 and 3.6.3.
4.6.2 When releasing the wellhead, take protective measures and lock the lifting tools. 4.7 Maintenance
4.7.1 After use, close the open hammer, remove it from the drill string, put it on the table steadily, and clean the body. 4.7.2 Storage method is the same as that in 3.7.3.
5 Closed down hammerWww.bzxZ.net
5.1 Scope of use
In addition to the uses listed in 4.1, it can also be used for drilling and coring. 5.2 Inspection before use
5.2.1 Select the specification series according to Table 1 in SY5213. 5.2.2 Check the sealing and tightening of the two oil plugs. 5.2.3 Inspection items are the same as those in 4.2.2.
5.3 Drill string assembly
5.3.1 Fishing tool + safety joint + closed down hammer + drill chain (25~60m) + drill pipe. 5.3.2 Internal cutter + drill pipe (cut length) + Long-type down hammer + drill pipe. Coring tool + drill chain (9m) + safety joint + closed down hammer + drill chain + drill pipe. 5.4 Operation method
5.4.1 Internal shock
5.4.1.1 Before shocking, use the rotary table surface as the base point and make marks on the square drill rod worker when the closed shock device is closed and opened. 5.4.1.2 Record the weight of the drill string above the fish neck in the drilling fluid. 5.4.1.3 Lift the drill string to the mark where the closed down hammer is pulled open, and continue to lift the drill string to make the drill string produce a certain amount of elastic extension. 5.4.1.4 Quickly lower the drill string to the closing mark to generate a downward force to hit the "fish". 5.4.2 Release the fishing tool
5.4.2.1 When opening and releasing, lift the drill string to 1/4~1/3 of the stroke of the closed down hammer, and lower the drill string sharply, and brake suddenly when it reaches the closing mark.
5.4.2.2 When releasing the convex, connect a drill pipe to the upper part of the closed down hammer, pull the closed down hammer away for a certain distance, and place a handle hammer between the two when they collide. Release the elevator and pull out the hammer suddenly. 5.4.3 Use cutting tools
6.4.3.1 Pull the closed down hammer away, keeping the distance not exceeding the maximum stroke. 5.4.3.2 The drilling pressure is the hanging weight of the drill string connected below the closed down-hammer. 5.4.4 Drilling coring operation
5.4.4.1 After the coring footage is completed, use the closed down-hammer to break the core. 5.4.4.2 The operation method is the same as 5.4.1.3. 5.5 Precautions
3.6.1, 3.6.3, 4.6.2. In addition, the closed down-hammer should be installed within 50m above the stuck point. 5.6 On-site maintenance
5.6.1 After use, close the closed down-hammer, remove it from the drill string, place it steadily on the drilling platform, and clear the drop cylinder. 5.6.2 The storage method is the same as 3.7.3.
6 Mechanical impactor
6.1 Scope of use
6,1.1 Applicable to the handling of stuck drill accidents that require upward shock, such as sand settling, small drilling limit, mud bag, drilling, etc. Applicable to deep drilling operations under high temperature and high pressure. 6.1.2
Drilling and coring broken cores.
Drilling formation test and unsealing.
6.2 Inspection before use
Check the factory (station) test certificate to see if the required shock force is adjusted. 6.2.2
The inspection of threads and platform is the same as 3.2.2.
6.2.3 Check the two oiling plugs to prevent leakage. 6.2.4 Check the upper joint and the punch joint. The age between them should be approximately Cen, proving that the friction mandrel and the friction slip are in the closed position. 6.3 Drill string assembly
6.3.1 Salvage tool + safety joint + mechanical upper hammer + drill chain (25~60m) + drill pipe. Formation tester + safety joint + mechanical upper hammer + drill chain (25~60m) + drill pipe. 6.3.2
6.3.3 Coring tool + drill chain (8~10m) + mechanical upper hammer + drill chain (2560m) + drill pipe. 6.4 Operation method
6.4.1 Record the original weight and the original hanging weight. 6.4.2
Lift the drill string at the fastest speed until the first shock occurs (remember the lifting force of the first shock) and slowly lower the drill string. The full indicator reading is less than the original hanging weight (and should also be greater than the original weight), proving that the mechanical upper hammer has been closed. Repeat 6.4.2 and 6.4.3. Complete multiple seismometers. 6.4-4
Operation steps for increasing the jarring force
6.4.5.1Operate as per 6.4.2.
Turn the drill string clockwise (0.5~~1.0 turns/1000m) and lock the turntable. Slowly lower the drill string as per the key points in 6.4.3.
Move the drill string within the range of the last jarring to eliminate the residual torque on the drill string. 6.4.5.4
6.4.5.5Repeat steps 6.4.5.1~6.4.5.4. Pull the mechanical jarring force open and gradually increase it to the rated jarring force. 6.5Precautions
6.5.1Same as 3.6.1 and 3.6.3.
6.5.2The mechanical jarring device should be installed within 50m above the stuck point. 6.5.3It is not allowed to jar out when there is torque on the drill string. 4
6.6 On-site maintenance
SY 541091
6.6.1 After use, remove the mechanical upper impactor from the drill string, place it stably on the drilling platform, and clean it. 6.6.2 Storage method is the same as 3.7.3.
Oil pressure upper impactor
7.1 Scope of use
Same as 6.1.1, 6.1.3, 6.1.4.
7.2 Inspection before use
7.2.1 Select the specification series listed in Table 1 of SY5086. 7.2.2 The oil pressure upper impactor shall comply with the series standards. 7.2.3 Inspection of threads and water holes is the same as 3.2.2, 6.2.4. 7.3 Drilling String Assembly
7.3.1 Drilling Tool + Safety Joint + Down Hammer + Hydraulic Up Hammer + Drill Chain (25~60m) + Shock Accelerator + Drill Pipe. Drilling Tool + Safety Joint + Hydraulic Up Hammer + Drill Chain (60m) + Drill Pipe. 7.3.2
7.3.3 Formation Tester + Safety Joint + Drill Chain (10m) + Hydraulic Up Hammer + Drill Chain (25~~60m) + Shock Accelerator + Drill Pipe. Coring Tool + Drill Chain (10m) + Safety Joint + Hydraulic Up Hammer + Drill Chain (25~~60m) + Drill Pipe. 7.3.41
7.4 Operation Method
Operate as per 6.4.1.
Undergo the drill string 50100kN and turn off the hydraulic up hammer. 7.4.3
Lift the drill string to the preset hanging weight, hold the brake and wait for release. 7.4.4
Cut the load.
Depending on the effect, the shock force should be gradually adjusted from small to large. When increasing the lifting hanging weight, it is not allowed to exceed the rated shock of the shock device. 7.4.5
Repeat 7.4.2~7.4.4. Complete multiple shocks until the jam is released. 7.5 Precautions
In addition, continuous shocks should be accompanied by intermittent cooling to prevent overheating and reduce the shock effect. 7.5.2 The shock device should be installed within 50m above the jam point. 7.5.3 Safety protection is the same as 3.6.1 and 3.6.3. 7.6 Common troubleshooting
7.6.1 Unsuccessful shock
7.6, 1.1 Lift the drill string to the required shock force and hold the brake until the shock occurs. 7.6.1.2 Increase the lifting weight.
7.6.1.3 If it still does not jar, pressurize the drill string by 10~50kN to close the hydraulic upper gear. If the waiting time is too long, increase the jar force appropriately.
7.6.2 The jar force is not large
.6.2.1 If it still does not meet the requirements after taking measures, it should be replaced. 7.6.2.2 Increase the number of drill bits to meet the jar force requirements. 7.6.2.3 Use with the jar accelerator..7 On-site maintenance
.7.1 After using the hydraulic upper gear, apply grease to the jar rod and the mandrel, and reset it. 7.7.2 Remove it from the drill string and place it on the drilling platform for cleaning. 7.7.3 Storage method is the same as 3.7.3.
8Super upper impactor
Scope of use
Same as 6.1.1, 6.1.4.
Inspection before use
The performance of the super upper impactor shall comply with the provisions of Table 1. 8.2.2
Test stand test data, see Table 2.
SY5410-91
Super upper impactor specification series and performance parameter table Table 1
Water hole diameter
Big shock force
Check the integrity of the screws and shoulders at both ends, and the water hole should be unobstructed. The joint inspection is the same as 6.2.4.
8.2.5 Check each connection thread. Tighten according to the specified torque value. 8.3 Drill string assembly
Working torque
Joint thread
Fishing tool + safety joint + super impactor + drill chain (25-60m) + impact accelerator + drill pipe. 8.3.1
Fishing tool + safety joint + super impactor + drill chain (60m) + drill pipe. 8.3.2
8.3.3 Formation tester + safety joint + super impactor + drill chain (60m) + drill pipe. 8.4
Operation method
Operate according to 6.4.1.
\ Lower the drill string to 30-100kN and close the super impactor. 8.4.3
Operate according to 7.4.3.
Working temperature
8.4.4 Start with a lower impact force and gradually increase it until it is unstuck. However, it is not allowed to exceed the maximum shock force specified by the super upper hitter (see Table 1).
8.4.5 Repeat steps 8.4.2 to 8.4.4 to complete the shock. 8.4.6 When the required shock force is reached but no shock is generated, the lifting speed of the hanging weight can be adjusted. The greater the lifting force, the greater the impact force generated.
8.5 Notes
8.5.1 Safety protection is the same as 3.6.1 and 3.6.3. 8.5.2 The super upper hitter is generally in the open state when lifting the lifting port. It is not allowed to close the super upper hitter when unbuckling to prevent the super upper hitter from pulling again to cause shock.
8.5.3 The super upper hitter is not allowed to perform reverse buckling operations inside. 8.5.4 It is not allowed to drill with the super hitter. 8.6 Common troubleshooting is the same as 7.6.
8.7 On-site maintenance
8.7.1 After using the super hitter, apply grease to the auxiliary part of the bear striker and reset it. 6
Recommended and lowered
maximum pulling load
kN(tf)
400 (40.82)
CSJ62 /700 (71.43)
CSJ70 $00 (01.84)
1200(122.45)
Tensile test
70 (7.14)
90 (9.18)
100 (10.22
150 (15.3)
SY 5410—91
Test stand test data
Standard test
Minimum standard test!
280(28.6)
450 (45.9)
500(5J)
060 (66.3)
Storage method is the same as 7.7.2, 3.7.3.
9 Shock accelerator
200(20.4)
350 (35.7)
Outer cylinder body shrink thread
Punch pipe and spindle connection thread
Upper joint and spindle connection thread
Tightening torque N·m(kgf-m)）12740 (1300)
24 500 (2 500)
200(40.82)
450 (45.9)
34 300 (3 500)
49000 (5000)
Scope of use
Virtual impact accelerator is a special impact tool that adds impact function to various impactors. 9.2 Inspection before use
9.2.1 Select the specification series according to Table 1 in 5Y5086. 9.2.2 The shock accelerator should meet the series standards. The inspection of the thread and water hole is the same as that of Article 3.2.2.
9.2.4 Check the upper joint and the impact joint, and the gap should be approximately zero. 9.3 Drill string assembly
Salvage tool + safety joint + impactor + drill chain (25~60m) + shock accelerator + drill pipe. 9.4 Operation method
9.4.1 Press the drill string down 50~100kN and turn off the shock accelerator. 9.4.2 Operate according to Article 7.4.
9.5 Precautions
9.5.1 The shock accelerator must be connected to the upper part of the drill chain above the upper hammer. 9.5.2 The shock accelerator must be used in conjunction with the upper hammer and must not be used alone as a shock tool. 9.6 On-site maintenance
Remove it from the drill string, stably move it to the drilling platform, and clean it. 9.6.1
Storage method is the same as 3.7.3.
While drilling jar
Scope of use
10.1.1 Applicable to all types of while drilling operations. 10.1.2 Provide upward shock or downward shock at any time. 10.2 Inspection before use
10.2.1 Select the specification series according to 5Y5082 in Table 1. 10.2.2 The while drilling jar should comply with the series standards. 1960 (200)
2450 (250)
2940(330)
3920(400)
10.2.3 Check the factory (station) test certificate. 10.2.4 Check that the upper and lower mandrels of the drilling jar are fully opened (i.e. the clamp should be stuck in the opened position of the mandrel). 10.2.5 Check that the oil plug should not be loose.
10.2.6 Check the threads and water holes in accordance with 3.2.2. 10.2.7 Check the jar force mark of the drill jar that has not been adjusted while drilling, which shall not exceed 1/31/2 of the weight of the drill string suspended on the upper part of the drill jar. 10.3 Drill String Assembly
10.3.1 Straight, pin head + drill chain + drill jar + drill chain (30-60m, smaller diameter or equal to the outer diameter of the drill jar) + pin rod.
10.3.2 Fixed well: drill bit + drill chain + heavy drill pipe (10-30m) + drill jar + heavy drill pipe (10-30m) + drill jar + drill chain (25-60m) + drill pipe. 10.4 Operation method
10.4.1 Drilling operation
10.4.1.1 Lift the prepared drill jar and drill jar onto the drilling platform with a lifting short section. Prevent collision. Apply the thread grease of the drill tool, connect it to the drill string according to the specified torque, lift the drill string, and remove the mandrel clamp. 10.4.1.23
10.4.1.3 The drill jar is in the open state during the drilling process. 10.4.1.4 Strictly control the lowering speed during drilling to prevent resistance at the reduced diameter, release the drill jar, and produce a shock. 10.4.1.5
If a shock has occurred, reset the slip, lift the drill string upwards lightly, and suspend the operation for a few minutes to prevent sudden lifting. 10.4.1.6 If a jam occurs during the drilling process, start the drill jar to release the jam. 10.4.2 Normal drilling operation
10.2.1 The drilling jar is in a state of tension. The drilling jar may also be in a state of pressure, but the pressure shall not exceed half of the pre-adjusted shock force before the jar is lowered into the well. 10.4.2.2
During drilling, the drilling jar may be closed, and slight shock may occur when the drill string is lifted. 10.4.2.4 Regardless of whether the drilling jar is in a state of tension or pressure, the drill must be delivered evenly to prevent the drill from being lumped or stuck. 10.4.2.5 Record the rotation time of the drilling jar in the well and its working condition. 10.4.3, Upward shock operation
10.4.3.1 Lower the drill string, pressurize the drilling jar by 50-100 kN, and close the drilling jar. 10.4.3.2 The operation method of lifting the drill string is the same as that of Article 7.4.3. 10.4.3.3 Repeat the operations in 10.4.3.1 and 10.4.3.2 to complete multiple shocks until the jam is released. Start with a moderate shock force and gradually increase it according to the effect, but it is not allowed to exceed the maximum upper shock force of the drilling jar. 10.4-3.43
10.4.4 Downward shock operation
10.4.4.1 Lower the drill string suspension weight to exceed the pre-adjusted shock force of the drilling jar until a shock occurs, and record the suspension weight during the shock. 10.4.4.2 After the shock, lift the drill string at the lowest lifting speed to exceed the upper suspension weight of the drilling jar by 50~100kV to reset the lower shock. 10.4.4.3 When the drilling jar lower shock is lowered, the upper shock will automatically reset. Therefore, the lifting force cannot exceed the requirements of 10.4.4.2 or last too long to avoid causing the drilling jar to release. 10.5 Common troubleshooting
10.5.1 The up-drilling hammer does not vibrate
10.5.1.1 The up-drilling hammer fails to reset completely. When operating in a fixed well, you can increase the load or stop the circulating drill to reset the up-drilling hammer.
If the oil is limited or the cone is blocked, you can move the drill string and try to open the up-drilling hammer. If it does not work, pull the drill out and replace it. 10.5.1.3 If the free stroke is in place and there is no vibration, the drill should be pulled out and replaced. 10.5.2 The down-drilling hammer does not vibrate
10.5.2.1 If the drilling pressure is greater than the pre-adjusted vibration force and there is still no vibration, continue to increase the pressure until it vibrates. 10.5.2.2 For deep drilling or directional drilling, the drill string is affected by friction, and the oil is not transmitted to the up-drilling hammer. It is necessary to increase the drilling pressure. 10.5.2.3 If the jar is not reset, the drill string should be lifted again to reset it, or the pump should be turned on to reset it. Stop pumping or increase the impact force.
10.6 Notes
10.6.1 The impact force of the jar should be adjusted as required. Remove the locking pin of the adjustment ring before going down the well, apply a layer of sealing grease and then tighten it to prevent leakage and loosening.
The card chain of the jar is not allowed to be removed before installation. 10.6.21
The outer diameter of the drill chain and other tools on the upper part of the jar is not allowed to be larger than the outer diameter of the jar. 10.6.3
The hanging weight of the drill chain at the bottom of the jar should be greater than the predetermined drilling pressure, so that the jar is in a tensile state. 10.6.4
When drilling, the drilling jar is pulled out of the parallel port. The mandrel clamp must be installed on the parallel port, and then it must be placed on the column and placed on the drill rod box.
10.6.6 No worker is allowed to hang it on the mandrel to avoid damaging the mandrel. When operating the drilling platform, the lifting clamp should avoid fine thread parts. 10.6.74
10.6.8 The drilling jar should be replaced according to the service life. 10.7 On-site maintenance
The drilling jar should be pulled out of the parallel port, the mandrel should be flushed, and the exhaust hole should be vented. When not in use, it should be placed under the platform steadily. 10.7.1
10.7.2 During the out-of-service period, inject engine oil into the exhaust hole and wrap the hole with plastic cloth to prevent mud and sand from entering. 10.7.3 Apply grease to the exposed part and clamp the clamp. 10.7.4 Wear the thread guard at both ends to prevent collision. Additional remarks:
This standard is proposed and managed by the Standardization Committee of Right Oil Drilling Engineering. This standard is drafted by the Drilling Company No. 1 of Liaohe Petroleum Exploration Bureau. The main drafter of this standard is Song Yongjun.
This standard continues to be effective after the review in 199
, and the review result has been approved by the State Administration of Petroleum and Chemical Industry.
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