CN209244556U - A kind of continuous pipe fracturing tool position error measuring system of experiment - Google Patents
A kind of continuous pipe fracturing tool position error measuring system of experiment Download PDFInfo
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- CN209244556U CN209244556U CN201821417943.4U CN201821417943U CN209244556U CN 209244556 U CN209244556 U CN 209244556U CN 201821417943 U CN201821417943 U CN 201821417943U CN 209244556 U CN209244556 U CN 209244556U
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Abstract
The utility model provides a kind of experiment continuous pipe fracturing tool position error measuring system, including continuously manages, connector, fracturing tool, short sleeve one, short sleeve two, experiment of open window casing, casing coupling three, horizontal wellbore and moccasin ruler；Experiment of open window casing one end is connected with horizontal wellbore, and the other end is connect with short sleeve two, and the other end of short sleeve two is connected with short sleeve one；Described fracturing tool one end is connect by connector with continuous pipe, and the other end of fracturing tool is connect with moccasin ruler；Continuous pipe is located in experiment of open window casing, and fracturing tool is located at the inside of short sleeve two and short sleeve one；Windowing part is provided on the experiment of open window casing.The utility model is directed to operating condition of the sensor block of locator just in two hoop of short sleeve, in conjunction with fracturing tool during upper mention on alter measurement, amendment measurement gained position error provides reference, perforation positioning accuracy is improved, engineering is complicated caused by reducing because of positioning fault.
Description
Technical field
The utility model belongs to continuous pipe pressure break perforation position error fields of measurement, in particular to the continuous pipe of a kind of experiment
Fracturing tool position error measuring system.
Background technique
It is sealed in dragging staged fracturing operation in continuous tube bottom at present, straight well, directional well fineization segmentation fracturing work are more next
It is more, and existing continuous tube bottom envelope drag fracturing operating instruction be not able to satisfy straight well, directional well fineization segmentation pressure break for
The demand of position error detection, and then precisely quantitative error compensation benchmark can not be provided to field operation, to cause because fixed
Underground caused by the error of position is complicated.
According to investigation, the measuring system and method for existing several continuous pipe fracturing tool position errors, mainly with even oil
The data that the included depth counter of pipe working rig is shown are reference, pass through the load for crossing box cupling of mechanical casing collar locator
The voltage pulse signal that lotus variation or wireless casing collar locator (CCL) coil and magnet generate finds out short sleeve position, then basis
The casing coupling real data that well logging provides is calibrated short sleeve position, and is marked on coiled tubing, and then recalibration is short
Sleeve position near casing is spray gun specking alignment perforation fragment position finally after packer setting.Above-mentioned position error is surveyed
Though amount system and method preferably resolves the tool setting problems in continuous pipe pressing crack construction process, all observation process are equal
It is carried out on ground, the execution of everything judges by ground acquisition device, cannot directly measure practical specking and theory
Error between specking, therefore, influence of the change of well oil pipe track and pit shaft inner case to error is set can not be complete
Complete true, intuitive reflection and measurement, it is therefore desirable to a kind of measuring system for testing continuous pipe fracturing tool position error
And method, the error of the practical specking of precise measurement and theoretical specking, verify existing continuous tube bottom envelope drag fracturing operating instruction
Whether the accurate positioning demand of straight well, directional well fineization segmentation pressure break is met.
Utility model content
In order to overcome existing position error measurement method accuracy is low, directly cannot observe and measure practical specking with
The problem of error of theoretical specking, the utility model provide a kind of experiment continuous pipe fracturing tool position error measuring system,
The utility model is designed reasonably, accuracy are high, and experimental data really reflects spray gun specking and designs the error between specking, after being
The location error compensation of phase provides reliable basis, has good reference significance.
One of the purpose of this utility model is that the utility model just can cover tube coupling for the sensor block of locator
Operating condition in hoop, in conjunction with play variable quantity of fracturing tool during upper mention, influence of the amount of altering to position error in grasp, together
When, amendment measurement gained position error effectively instructs site operation, makes the perforation positioning of continuous tube bottom envelope dragging staged fracturing more
Add precisely, promote operating efficiency, engineering is complicated caused by reducing because of positioning fault.
The two of the purpose of this utility model are that the utility model can not up to be designed for packer setting tonnage and want
It asks, the operating condition that packer is not set completely, after measurement and positioning error, according to measuring and calculating, resulting packer is practical sets
The difference away between is set away from theory, corrects position error.
The technical solution adopted in the utility model are as follows:
A kind of continuous pipe fracturing tool position error measuring system of experiment, including continuously manage, connector, safety joint,
Fracturing tool, short sleeve one, short sleeve two, experiment of open window casing, casing coupling three, horizontal wellbore and moccasin ruler；The windowing
Experiment thimble one end is connected with horizontal wellbore, and the other end is connect with short sleeve two, and the other end of short sleeve two is connected with short sleeve
One；Described fracturing tool one end is connect by connector with continuous pipe, and the other end of fracturing tool is connect with moccasin ruler；Continuously
Pipe is located in experiment of open window casing, and fracturing tool is located at the inside of short sleeve two and short sleeve one；The experiment of open window casing
On be provided with windowing part, be provided with 5 speckings in the windowing part range.
The connector is connect with fracturing tool by safety joint.
The fracturing tool includes spray gun, packer, locator and righting-oriented device；The spray gun, packer, positioning
Device and righting-oriented device are sequentially connected.
Sensor block is provided on the locator.
The righting-oriented device of the fracturing tool tail portion is connect with moccasin ruler.
The experiment of open window casing is connect with short sleeve two by casing coupling two.
The short sleeve two is connect with short sleeve one by casing coupling one.
The utility model has the following beneficial effects:
The utility model is designed reasonably, accuracy are high, and experimental data really reflects between spray gun specking and design specking
Error provides reliable basis for the location error compensation in later period, has good reference significance.
The utility model can be directed to operating condition of the sensor block of locator just in collar, exist in conjunction with fracturing tool
Play variable quantity during above mentioning, influence of the amount of altering to position error in grasp, meanwhile, amendment measurement gained position error,
Site operation effectively is instructed, keeps the perforation positioning of continuous tube bottom envelope dragging staged fracturing more accurate, promotes operating efficiency, reduce
Engineering is complicated caused by making mistakes because of positioning.
The utility model can meet design requirements for packer setting tonnage, the work that packer is not set completely
Condition sets difference away between away from theory according to measuring and calculating practical set of resulting packer after measurement and positioning error
Value corrects position error.
It is further detailed below with reference to attached drawing.
Detailed description of the invention
Fig. 1 is the downhole tool connection schematic diagram in the utility model measuring system.
Fig. 2 is the schematic illustration of the amount of altering on the utility model measuring system measurement and positioning device.
Fig. 3 is the schematic illustration of the utility model measuring system measurement and positioning error.
Fig. 4 is the spray gun specking position view in the utility model fracturing tool.
In figure, appended drawing reference are as follows: 1, continuous pipe；2, connector；3, safety joint；4, spray gun；5, rigid centralizer；6, it seals
Every device；7, locator；8, righting-oriented device；9, fracturing tool；10, experiment of open window casing；11, horizontal wellbore；12, short sleeve
One；13, collar one；14, short sleeve two；15, collar two；16, do not open a window part；17, collar three；18, it covers
Pipe flange；19, sensor block；20, moccasin ruler；21, open a window part；22, the center line between two rows of nozzles；23, steel tape.
Specific embodiment
Embodiment 1:
Lack a kind of intuitive continuous pipe fracturing tool position error measurement method, existing in the prior art to overcome
Position error measurement method accuracy is low, existing positioning measurment system acts load signal or electromagnetism by being transferred to ground
The problem of signal judges, directly cannot observe and measure the error of practical specking and theoretical specking, the utility model provides such as
A kind of experiment continuous pipe fracturing tool position error measuring system, the utility model is designed reasonably, accuracy described in Fig. 1-4
Height, experimental data really reflect spray gun specking and design the error between specking, and for the location error compensation in later period, provide can
By foundation, there is good reference significance.
One of the purpose of this utility model is that the utility model just can cover tube coupling for the sensor block of locator
Operating condition in hoop, in conjunction with play variable quantity of fracturing tool during upper mention, influence of the amount of altering to position error in grasp, together
When, amendment measurement gained position error effectively instructs site operation, makes the perforation positioning of continuous tube bottom envelope dragging staged fracturing more
Add precisely, promote operating efficiency, engineering is complicated caused by reducing because of positioning fault.
The two of the purpose of this utility model are that the utility model can not up to be designed for packer setting tonnage and want
It asks, the operating condition that packer is not set completely, after measurement and positioning error, according to measuring and calculating, resulting packer is practical sets
The difference away between is set away from theory, corrects position error.
A kind of experiment continuous pipe fracturing tool position error measuring system, including continuous pipe 1, connector 2, safety joint
3, fracturing tool 9, short sleeve 1, short sleeve 2 14, experiment of open window casing 10, casing coupling 3 17, horizontal wellbore 11 and soft
Tape measure 20；Described 10 one end of experiment of open window casing is connected with horizontal wellbore 11, and the other end is connect with short sleeve 2 14, short sleeve two
14 other end is connected with short sleeve 1；Described 9 one end of fracturing tool is connect by connector 2 with continuous pipe 1, pressure break work
The other end of tool 9 is connect with moccasin ruler 20；Continuous pipe 1 is located in experiment of open window casing 10, and fracturing tool 9 is located at short sleeve 2 14
With the inside of short sleeve 1；Windowing part 21,21 model of windowing part are provided on the experiment of open window casing 10
5 speckings are provided in enclosing.
A kind of one kind experiment as illustrated in fig. 1 and 2 is present embodiments provided to be measured with continuous pipe fracturing tool position error
The installation method of system, comprising the following steps:
Step 1: connecting continuous pipe fracturing tool positioning tool string, by spray gun 4 and rigid centralizer 5, packer 6, determines
Position device 7 and righting-oriented device 8 are sequentially connected, and form fracturing tool 9, then by connector 2 and safety joint 3 by continuous pipe 1 with
Fracturing tool 9 connects, and forms continuous pipe fracturing tool positioning tool string.
Step 2: experiment of open window casing 10 is connect with horizontal wellbore 11 by casing flange 18 by connection experiment pit shaft, then
Experiment of open window casing 10, short sleeve 2 14 and short sleeve 1 are passed sequentially through into collar 3 17, collar 2 15 and set
Tube coupling hoop 1 connects, and completes the connection of experiment pit shaft.
Step 3: the metal pull ring of 20 end of moccasin ruler and 8 end of righting-oriented device are passed through welding by connection moccasin ruler 20
It links together.
5 design speckings are set in 21 range of windowing part of experiment of open window casing 10, and the length of windowing part 21 is set
Meter meets 5 design speckings and marks within the part 21 that opens a window, and width design meets the observation and measurement of position error.Measurement
Error between 5 design speckings and the practical specking of spray gun 4, it is intuitive to reflect position error, for continuous tube bottom envelope segmentation pressure
The perforation positioning for splitting scene provides error compensation foundation.
The utility model is designed reasonably, accuracy are high, and experimental data really reflects between spray gun specking and design specking
Error provides reliable basis for the location error compensation in later period, has good reference significance.The utility model can be directed to
Operating condition of the sensor block 19 of locator 7 just in collar, in conjunction with play variable quantity of fracturing tool during upper mention,
Influence of the amount of altering to position error in grasp, meanwhile, amendment measurement gained position error effectively instructs site operation, makes continuous
The perforation positioning of tube bottom envelope dragging staged fracturing is more accurate, promotes operating efficiency, engineering is multiple caused by reducing because of positioning fault
It is miscellaneous.
The utility model can meet design requirements for packer setting tonnage, the work that packer is not set completely
Condition sets difference away between away from theory according to measuring and calculating practical set of resulting packer after measurement and positioning error
Value corrects position error.
Embodiment 2:
On the basis of based on the above embodiment, in the present embodiment, the connector 2 is connect with fracturing tool 9 by safety
First 3 connection.
The fracturing tool 9 includes spray gun 4, packer 6, locator 7 and righting-oriented device 8；The spray gun 4, packing
Device 6, locator 7 and righting-oriented device 8 are sequentially connected.
Sensor block 19 is provided on the locator 7.
The righting-oriented device 8 of 9 tail portion of fracturing tool is connect with moccasin ruler 20.
The experiment of open window casing 10 is connect with short sleeve 2 14 by casing coupling 2 15.
The short sleeve 2 14 is connect with short sleeve 1 by casing coupling 1.
The Design of length of short sleeve 1, short sleeve 2 14 and experiment of open window casing 10 in the present embodiment, it is ensured that short sleeve
After one 12 connect with short sleeve 2 14 and experiment of open window casing 10, when fracturing tool 9 is above mentioned or transferred wherein, locator 7 can
The compression and rebound of sensor block 19 are completed by collar 1 and collar 2 15.
After short sleeve 1 is connect with short sleeve 2 14 and experiment of open window casing 10 in the present embodiment, the length for the part 21 that opens a window
Degree design ensures that the label of 5 design speckings is all fallen within windowing part 21, and the width design of windowing part 21 meets positioning
The observation and measurement of error.
The connection of moccasin ruler 20 in the present embodiment, it is ensured that after fracturing tool 9 is moved upwardly into short sleeve 1, moccasin ruler
20 capstan winch naturally droops other than one 12 tail portion of short sleeve, and tape measure and the fracturing tool 9 into short sleeve 1 keep same
Axis direction continues to move up with fracturing tool 9, and locator 7 crosses the play of collar 1 and collar 2 15
The metal pull ring that not will lead to 20 end of moccasin ruler is separated with 8 end of righting-oriented device.In the windowing portion of experiment of open window casing 10
Divide and 5 design speckings are set in 21 ranges, the Design of length of windowing part 21 meets 5 design speckings and marks in the part that opens a window
Within 21, width design meets the observation and measurement of position error.It measures between 5 designs specking and the practical speckings of spray gun 4
Error, it is intuitive to reflect position error, for continuous tube bottom seal staged fracturing scene perforation position error compensation foundation is provided.
Embodiment 3:
A kind of experiment as described in Fig. 3 and 4 is provided on the basis of above-mentioned two embodiment, in the present embodiment with continuously
The method of pipe fracturing tool position error measurement, specific measuring process are as follows:
Step 1: simulator locating device 7 passes through the process of collar 1 and collar 2 15；
After continuous pipe 1 connects connector 2, safety joint 3 and fracturing tool 9, continuous pipe 1 is with fracturing tool 9 in short sleeve
One 12, movable back and forth in short sleeve 2 14 and experiment of open window casing 10, meanwhile, checking sealing of packer 6 sets, solves sealing property；
Fracturing tool 9 is transferred, the sensor block 19 of locator 7 is allowed to be exposed to one 12 tail end of short sleeve, continuous pipe 1 keeps 4-
5 ms/min of speed above mentions, and observation locator 7 crosses collar 1 and collar 2 15 moment fracturing tool 9 in casing
Axial play situation of change；
If there is significant change, pass through 20 precise measurement variable quantity of moccasin ruler；
Step 2: simulator locating error measure process；
Respectively using position of upward a, b, c, d and e meters away from collar 2 15 as design specking position, and carry out mark
Note, concrete operations are as follows:
1) in the state that 6 balanced valve of packer is fully withdrawn, sensor block (19) upper end of measurement and positioning device 7 is apart from spray gun
X meters of distance of 4 two rows of nozzle centerlines 22, packer 6 measure spray gun 4 relative to experiment of open window casing 10 in setting process
Y meters of downward skidding distance.
2) fracturing tool 9 is transferred to short sleeve 1, is at the uniform velocity above mentioned with 4-5 ms/min of speed, observation experiment is used
The pulling force of coiled tubing unit injection head pays attention to tension variations when sensor block 19 is into collar 1 and collar 2 15,
Load bounce is observed, and records continuous pipe depth value；It repeats the operation and compares the load and depth number of excessively same hoop twice
According to analytical error, the depth for recording collar 1 and collar 2 15 is L1 meters and L2 meters；
3) fracturing tool 9 is transferred to short sleeve 1, is at the uniform velocity above mentioned with 4-5 ms/min of speed, with collar
2 15 depth data L2 are benchmark zero point, the downward first design specking in 10 top of experiment of open window casing are calculated, away from collar
2 15 upward e meters of positions, i.e. (L2-e) rice start to set when 7 depth data of locator is shown as (L2-e+X-Y) rice
Packer 6 applies bit pressure 2-3 tons；It observes and passes through and mark e on measurement 4 specking of spray gun of steel tape 23 and experiment of open window casing 10
Error at rice, repetitive operation 3 times, distribution record error information；
4) according to the program of step 3), the position error of a, b, c, d meters of positions of residue and analysis are measured respectively.
Packer 6 sets not up to builder's tonnage, the operating condition that packer 6 is not set completely, after measurement and positioning error, root
It actually sets according to measuring and calculating resulting packer 6 away from the theoretical difference set away between, corrects position error.
Present embodiments provide a kind of method tested and measured with continuous pipe fracturing tool position error, including following step
It is rapid:
Step 1: simulator locating device 7 passes through the process of collar 1 and collar 2 15.
(1) after continuous pipe 1 connects connector 2, safety joint 3 and fracturing tool 9, allow continuous pipe 1 with fracturing tool 9 short
It is movable back and forth in casing 1, short sleeve 2 14 and experiment of open window casing 10, meanwhile, the setting of checking sealing of packer 6, deblocking property
Energy；
(2) fracturing tool 9 is transferred, the sensor block 19 of locator 7 is allowed to be exposed to one 12 tail end of short sleeve, continuous pipe 1 is protected
It holds 4-5 ms/min of speed above to mention, observation locator 7 crosses collar 1 and collar 2 15 moment fracturing tool 9 exists
The play situation of change of casing axial direction；
(3) if there is significant change, pass through its variable quantity of 20 precise measurement of moccasin ruler.
Step 2: simulator locating error measure process.
Respectively using the rice position a, b, c, d and e of collar 2 15 as design eject position, and mark.Specifically
It operates as follows:
(1) in the state that 6 balanced valve of packer is fully withdrawn, 19 upper end of sensor block of measurement and positioning device 7 is apart from spray gun
The distance (X meters) of two rows of nozzle centerlines 22, packer 6 measure spray gun relative to experiment of open window casing 10 in setting process
Downward skidding distance (Y meters)；
(2) fracturing tool 9 is transferred to short sleeve 1, is at the uniform velocity above mentioned with 4-5 ms/min of speed, observation experiment
With the pulling force of coiled tubing unit injection head, notice that pulling force becomes when sensor block 19 is into collar 1 and collar 2 15
Change, observation load bounce, and records continuous pipe depth value.It repeats the operation and compares the load and depth of excessively same hoop twice
Data, analytical error, the depth for recording collar 1 and collar 2 15 is L1 meters and L2 meters；
(3) fracturing tool 9 is transferred to short sleeve 1, is at the uniform velocity above mentioned with 4-5 ms/min of speed.To cover tube coupling
Binding round 2 15 depth data L2 is benchmark zero point, calculates downward first design specking (e meters) position in 10 top of experiment of open window casing,
That is (L2-e) rice starts set packer 6 when 7 depth data of locator is shown as (L2-e+X-Y) rice, applies bit pressure 2-3
Ton.Observe and measure the error on 4 specking of spray gun and experiment of open window casing 10 at e meters of label, repetitive operation 3 times, distribution record
Error information；
(4) according to the program of step (3), the position error of a, b, c, d meters of positions of residue and analysis are measured respectively.This is practical
Novel measuring system simulates determining for continuous tube bottom envelope dragging staged fracturing using continuous pipe+connector+safety joint+fracturing tool
Position device passes through collar working condition.When continuous tube fracturing tool enters short sleeve from one bottom of short sleeve, measurement system
The moccasin ruler of system by the mutation of scale, record fracturing tool on alter distance, be generating tool in position error measurement process
On the case where altering the reference correction value of position error is provided.
The utility model measuring system is simulated continuous tube bottom envelope using continuous pipe+connector+safety joint+fracturing tool and is dragged
The position error of dynamic staged fracturing measures working condition.When continuous tube fracturing tool is transferred to short sleeve one, with 4-5 meters/
The speed of minute at the uniform velocity above mentions, meanwhile, using the depth data L2 of collar 2 15 as benchmark zero point, calculate experiment of open window casing
The position of the downward first design specking in top, i.e. (L2-e) rice, when locator depth data is shown as (L2-e+X-Y) rice
When, start set packer, apply bit pressure 2-3 tons, observes and measure the error on spray gun specking and casing at e meters of label, weight
It operates 3 times again, distribution record error information；The position error process of measurement of specking is designed according to first, respectively measurement residue 4
The position error of a specking and analysis.
It should be noted that structure, ratio, the size etc. illustrated in this specification institute attached drawing, only to cooperate explanation
The revealed content of book is not intended to limit the utility model enforceable so that those skilled in the art understands and reads
Qualifications, the modification of any structure, the change of proportionate relationship or the adjustment of size, can be generated not influencing the utility model
The effect of and the purpose that can reach under, should all still fall in the range of the revealed technology contents of the utility model can cover.
Meanwhile cited such as " one " in this specification, " two ", " top ", " bottom ", "center" and " first " use
Language is merely convenient to being illustrated for narration, rather than to limit the enforceable range of the utility model, the change of relativeness or
Adjustment, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the utility model.
For the structure and its component of detailed description be existing apparatus in the utility model, in the utility model will no longer into
Row illustrates one by one.
Claims (7)
1. a kind of continuous pipe fracturing tool position error measuring system of experiment, it is characterised in that: including continuously managing (1), connection
Device (2), safety joint (3), fracturing tool (9), short sleeve one (12), short sleeve two (14), experiment of open window casing (10), casing
Box cupling three (17), horizontal wellbore (11) and moccasin ruler (20)；Described experiment of open window casing (10) one end is connected with horizontal wellbore
(11), the other end is connect with short sleeve two (14), and the other end of short sleeve two (14) is connected with short sleeve one (12)；The pressure
It splits tool (9) one end and is connect by connector (2) with continuous pipe (1), the other end of fracturing tool (9) and moccasin ruler (20) are even
It connects；Continuous pipe (1) is located in experiment of open window casing (10), and fracturing tool (9) is located at short sleeve two (14) and short sleeve one (12)
Inside；It is provided with windowing part (21) on the experiment of open window casing (10), is set in described windowing part (21) range
It is equipped with 5 speckings.
2. a kind of continuous pipe fracturing tool position error measuring system of experiment according to claim 1, it is characterised in that:
The connector (2) is connect with fracturing tool (9) by safety joint (3).
3. a kind of continuous pipe fracturing tool position error measuring system of experiment according to claim 1, it is characterised in that:
The fracturing tool (9) includes spray gun (4), packer (6), locator (7) and righting-oriented device (8)；The spray gun (4),
Packer (6), locator (7) and righting-oriented device (8) are sequentially connected.
4. a kind of continuous pipe fracturing tool position error measuring system of experiment according to claim 3, it is characterised in that:
Sensor block (19) are provided on the locator (7).
5. a kind of continuous pipe fracturing tool position error measuring system of experiment according to claim 3, it is characterised in that:
The righting-oriented device (8) of described fracturing tool (9) tail portion is connect with moccasin ruler (20).
6. a kind of continuous pipe fracturing tool position error measuring system of experiment according to claim 1, it is characterised in that:
The experiment of open window casing (10) is connect with short sleeve two (14) by casing coupling two (15).
7. a kind of continuous pipe fracturing tool position error measuring system of experiment according to claim 1, it is characterised in that:
The short sleeve two (14) is connect with short sleeve one (12) by casing coupling one (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821417943.4U CN209244556U (en) | 2018-08-31 | 2018-08-31 | A kind of continuous pipe fracturing tool position error measuring system of experiment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821417943.4U CN209244556U (en) | 2018-08-31 | 2018-08-31 | A kind of continuous pipe fracturing tool position error measuring system of experiment |
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| CN209244556U true CN209244556U (en) | 2019-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114858318A (en) * | 2021-02-03 | 2022-08-05 | 中国石油天然气集团有限公司 | Wireless injection head load calibrator |
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2018
- 2018-08-31 CN CN201821417943.4U patent/CN209244556U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114858318A (en) * | 2021-02-03 | 2022-08-05 | 中国石油天然气集团有限公司 | Wireless injection head load calibrator |
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Effective date of registration: 20201027 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 610056 6 Chenghua District chase street, Chengdu, Sichuan Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |
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