CN113882835A - Electric control system applied to oil field drilling - Google Patents
Electric control system applied to oil field drilling Download PDFInfo
- Publication number
- CN113882835A CN113882835A CN202110916392.6A CN202110916392A CN113882835A CN 113882835 A CN113882835 A CN 113882835A CN 202110916392 A CN202110916392 A CN 202110916392A CN 113882835 A CN113882835 A CN 113882835A
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- China
- Prior art keywords
- heat dissipation
- electrically connected
- control system
- electric control
- drilling motor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005553 drilling Methods 0.000 title claims abstract description 78
- 230000017525 heat dissipation Effects 0.000 claims abstract description 66
- 238000001816 cooling Methods 0.000 claims description 28
- 239000004065 semiconductor Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
- E21B44/02—Automatic control of the tool feed
- E21B44/04—Automatic control of the tool feed in response to the torque of the drive ; Measuring drilling torque
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to the technical field of electric control, and relates to an electric control system applied to oil field drilling, wherein a heat dissipation system of the electric control system is electrically connected with a drilling motor, the drilling motor is electrically connected with a sensing system, the sensing system is electrically connected with a warning system, the warning system is electrically connected with a microprocessor, the microprocessor is in signal connection with a remote control system, the system can detect the working temperature of the drilling motor in real time by arranging a temperature sensor and a timer, and simultaneously controls the heat dissipation system to work after the temperature exceeds the set value after being compared by a database, so that the heat dissipation operation of the drilling motor is carried out in time, the timer works, the high temperature condition still exists in the set work, the warning system can warn and transmit a fault signal to the microprocessor, and the purposes of warning and stopping the working of the drilling motor in time are achieved.
Description
Technical Field
The invention belongs to the technical field of electric control, and particularly relates to an electric control system applied to oil field drilling.
Background
The task of drilling a borehole from the surface using mechanical equipment or manual labor is known as drilling. Generally refers to the engineering of drilling boreholes and large diameter water-supply wells for the exploration or exploitation of liquid and gaseous minerals such as oil, gas, and the like. The application of well drilling in national economic construction is extremely wide.
At present, at the well drilling in-process, adopt drilling motor to drive the drilling rod mostly and rotate the drilling, but current drilling motor is in the use, very easily appears the high temperature condition, and then leads to the drilling motor to damage, is unfavorable for guaranteeing drilling efficiency, is unfavorable for practicing thrift the cost simultaneously, and can't in time report to the police according to the fault conditions, and then overhauls for using and brings very big inconvenience.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides an electric control system applied to oil field drilling, and solves the technical problems of no heat dissipation function and inconvenient use and maintenance.
In order to achieve the purpose, the electric control system applied to the oilfield drilling comprises a heat dissipation system, wherein the heat dissipation system is electrically connected with a drilling motor, the drilling motor is electrically connected with a sensing system, the sensing system is electrically connected with a warning system, the warning system is electrically connected with a microprocessor, the microprocessor is in signal connection with a remote control system, the drilling motor is electrically connected with a frequency conversion system, and the frequency conversion system is electrically connected with the warning system.
Preferably, the heat dissipation system comprises a water cooling heat dissipation system and an air cooling heat dissipation system, and the water cooling heat dissipation system and the air cooling heat dissipation system are electrically connected with the drilling motor and the sensing system.
Preferably, the water-cooling heat dissipation system comprises a water pump, the water pump is electrically connected with a first semiconductor refrigerator, the first semiconductor refrigerator is fixedly connected with a circulating heat dissipation pipeline through a connecting pipeline, and the circulating heat dissipation pipeline is wound on the surface of the drilling motor.
Preferably, the air-cooled heat dissipation system comprises an air pump, the air pump is electrically connected with a second semiconductor refrigerator, the second semiconductor refrigerator is fixedly connected with a heat dissipation nozzle through a connecting pipeline, and the heat dissipation nozzle is located on the surface of the drilling motor.
Preferably, the sensing system comprises a temperature sensor, a timer and a database.
Preferably, the warning system comprises a normal work prompt lamp, a high temperature prompt lamp, a buzzer and a fault signal transmitter, and the fault signal transmitter is electrically connected with the microprocessor.
Preferably, the variable frequency system comprises a frequency converter and a torque detector.
Preferably, the remote control system comprises a signal transmitter and a signal receiver.
Compared with the prior art, the invention has the beneficial effects that:
1. through setting the temperature sensor and the timer, the working temperature of the drilling motor can be detected in real time, meanwhile, after the temperature exceeds the set value after being compared by the database, the work of the heat dissipation system is controlled, the heat dissipation operation of the drilling motor is carried out in time, through the work of the timer, the high temperature condition still exists in the set work, the warning can be carried out through the warning system, the fault signal is transmitted to the microprocessor, the purposes of warning and stopping the work of the drilling motor in time are achieved, through setting the warning system, the normal work prompting lamp in the warning system can display the normal work state of the drilling motor, when the temperature of the motor is overhigh or the torque detection is unqualified, the warning is carried out through the high temperature prompting lamp and the buzzer, meanwhile, the fault signal transmitter is used for transmitting fault information to the remote control system through the microprocessor and the signal receiver, and the timely adjustment and maintenance of workers are facilitated, through setting up water-cooling system and air-cooled cooling system, can ensure the radiating effect, reinforcing heat dissipation function.
2. Through air pump work, can carry gas to the heat dissipation shower nozzle after through the refrigeration of second semiconductor refrigerator, spout to drilling motor, reach and carry out the radiating purpose of forced air cooling to drilling motor, through water pump work, can transmit cold air to drilling motor surface through the circulation cooling tube after the refrigeration of first semiconductor refrigerator with the water source, reach the radiating purpose of water-cooling, through setting up converter and torque detector, can adjust drilling motor rotational speed according to the use needs, detect simultaneously, and whether accord with the settlement according to the testing condition and judge, when not being conform to the setting value, realize the remote alarm purpose through warning system.
3. Through drilling motor work, can drive the drilling rod and rotate, reach the well drilling purpose, through setting up microprocessor and remote control system, can control each electrical apparatus operating condition of system, realize the purpose of teletransmission and control adjustment simultaneously, convenient to use through setting up signal transmitter and signal receiver, can carry out command signal transmission and acceptance to the system through microprocessor, makes things convenient for remote control.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic flow diagram of the system of the present invention;
FIG. 2 is a schematic flow chart of the heat dissipation system of FIG. 1;
FIG. 3 is a schematic flow chart of the water-cooling heat dissipation system of FIG. 2;
FIG. 4 is a schematic flow diagram of the air-cooled heat dissipation system of FIG. 2;
FIG. 5 is a schematic flow diagram of the sensing system of FIG. 1;
FIG. 6 is a schematic flow chart of the warning system of FIG. 1;
FIG. 7 is a schematic flow diagram of the frequency conversion system of FIG. 1;
FIG. 8 is a schematic flow chart of the remote control system of FIG. 1;
in the figure: 1. a heat dissipation system; 11. a water-cooling heat dissipation system; 111. a water pump; 112. a first semiconductor refrigerator; 113. a circulating heat dissipation pipeline; 12. an air-cooled heat dissipation system; 121. an air pump; 122. a second semiconductor refrigerator; 123. a heat dissipation spray head; 2. a sensing system; 21. a temperature sensor; 22. a database; 23. a timer; 3. a warning system; 31. a normal work prompt lamp; 32. a high temperature warning light; 33. a buzzer; 34. a fault signal transmitter; 4. a microprocessor; 5. a remote control system; 51. a signal receiver; 52. a signal transmitter; 6. a drilling motor; 7. a frequency conversion system; 71. a frequency converter; 72. a torque detector.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
the structure of the electric control system applied to oil field drilling is shown in fig. 1-8, and includes a heat dissipation system 1, the heat dissipation system 1 is electrically connected with a drilling motor 6, and can drive a drill rod to rotate through the work of the drilling motor 6, so as to achieve the purpose of drilling, the heat dissipation system 1 includes a water cooling heat dissipation system 11 and an air cooling heat dissipation system 12, the water cooling heat dissipation system 11 and the air cooling heat dissipation system 12 are electrically connected with the drilling motor 6 and the sensing system 2, and by setting the water cooling heat dissipation system 11 and the air cooling heat dissipation system 12, the heat dissipation effect can be ensured, and the heat dissipation function can be enhanced.
The well drilling motor 6 electricity is connected with sensing system 2 and includes temperature sensor 21, time-recorder 23 and database 22, through setting up temperature sensor 21 and time-recorder 23, can carry out real-time detection to well drilling motor 6 operating temperature, surpass after setting for simultaneously after the temperature is compared through database 22, control cooling system 1 work, in time carry out the radiating operation to well drilling motor 6, work through time-recorder 23, in setting for work, the high temperature condition still exists, can warn and transmit fault signal to microprocessor 4 through warning system 3, reach the purpose of reporting to the police and in time stopping well drilling motor 6 work.
2 electricity of sensing system is connected with warning system 3, warning system 3 is including normal work warning light 31, high temperature warning light 32, bee calling organ 33 and fault signal transmitter 34, fault signal transmitter 34 and 4 electric connection of microprocessor, through setting up warning system 3, normal work warning light 31 among the warning system 3 can show drilling motor 6 normal operating condition, when motor temperature is too high or the moment of torsion detects unqualifiedly, warn through high temperature warning light 32 and bee calling organ 33, transmit to remote control system 5 through microprocessor 4 and signal receiver 51 with the help of fault signal transmitter 34 simultaneously, make things convenient for timely adjustment of staff and maintenance.
Specifically, the water-cooling heat dissipation system 11 includes a water pump 111, the water pump 111 is electrically connected to a first semiconductor refrigerator 112, the first semiconductor refrigerator 112 is fixedly connected to a circulating heat dissipation pipeline 113 through a connection pipeline, the circulating heat dissipation pipeline 113 is wound on the surface of the drilling motor 6, and the water pump 111 works to transmit cool air to the surface of the drilling motor 6 through a circulating heat dissipation pipe after the water source is refrigerated by the first semiconductor refrigerator 112, so that the purpose of water-cooling heat dissipation is achieved.
Specifically, air-cooled cooling system 12 includes air pump 121, and air pump 121 electricity is connected with second semiconductor refrigerator 122, through connecting tube fixedly connected with heat dissipation nozzle 123 on the second semiconductor refrigerator 122, and heat dissipation nozzle 123 is located drilling motor 6 surface, works through air pump 121, can carry gas to heat dissipation nozzle 123 after refrigerating through second semiconductor refrigerator 122, spouts to drilling motor 6, reaches the purpose of carrying out the air-cooled heat dissipation to drilling motor 6.
Specifically, frequency conversion system 7 includes converter 71 and torque detector 72, through setting up converter 71 and torque detector 72, can adjust the drilling motor 6 rotational speed as required, detects simultaneously to whether judge according to the detection conditions and settlement, when not complying with the setting value, realize the remote alarm purpose through alarm system 3.
Specifically, the remote control system 5 includes a signal transmitter 52 and a signal receiver 51, and by arranging the signal transmitter 52 and the signal receiver 51, command signals can be transmitted and received to the system through the microprocessor 4, so that remote control is facilitated.
The working principle of the embodiment is as follows:
s1, firstly, setting the working frequency of a frequency converter 71 in a frequency conversion system 7 through a microprocessor 4 by a remote control system 5, and then controlling a drilling motor 6 to work through the microprocessor 4 by the remote control system 5 to drive a drill rod to rotate to perform drilling work;
s2, in the drilling process, the temperature sensor 21 in the sensing system 2 detects the operating temperature of the drilling motor 6, when the temperature is higher than a set value, the microprocessor 4 controls the operation of the heat dissipation system 1 to enable the water pump 111 and the air pump 121 to operate, water and air are respectively conveyed into the heat dissipation circulating pipeline and the heat dissipation spray head 123 after being cooled by the first semiconductor refrigerator 112 and the second semiconductor refrigerator 122 to dissipate heat of the drilling motor 6, and the timer 23 operates at the same time, and in the set time, if the temperature sensor 21 still senses that the temperature is higher than the set value, the high-temperature warning lamp in the warning system 3 is turned on, fault information is transmitted to the remote control system 5 through the fault signal transmitter 34 via the microprocessor 4 and the signal receiver 51, and the microprocessor 4 controls the drilling motor 6 to stop operating to avoid serious accidents;
s3, the worker can transmit a maintenance instruction through the signal transmitter 52 in the remote control system 5, the microprocessor 4 controls the heat dissipation system 1 to continue heat dissipation, and simultaneously informs the maintenance worker of the coming maintenance, and meanwhile in the drilling process, when the torque detector 72 detects that the working frequency of the frequency converter 71 does not accord with a set value, the buzzer 33 in the warning system 3 works to remind the worker of the coming maintenance, and meanwhile, a fault signal is transmitted to the remote control system 5, so that the worker can conveniently check and maintain.
The connection mode or the component structure which is not disclosed in the embodiment is the prior art.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.
Claims (8)
1. The utility model provides an electric control system for oil field well drilling, includes cooling system (1), its characterized in that: the heat dissipation system (1) is electrically connected with a drilling motor (6), the drilling motor (6) is electrically connected with a sensing system (2), the sensing system (2) is electrically connected with a warning system (3), the warning system (3) is electrically connected with a microprocessor (4), the microprocessor (4) is in signal connection with a remote control system (5), the drilling motor (6) is electrically connected with a frequency conversion system (7), and the frequency conversion system (7) is electrically connected with the warning system (3).
2. The electric control system applied to oilfield drilling according to claim 1, wherein: the heat dissipation system (1) comprises a water-cooling heat dissipation system (11) and an air-cooling heat dissipation system (12), and the water-cooling heat dissipation system (11) and the air-cooling heat dissipation system (12) are electrically connected with the drilling motor (6) and the sensing system (2).
3. An electric control system applied to oilfield drilling according to claim 2, wherein: the water-cooling heat dissipation system (11) comprises a water pump (111), wherein the water pump (111) is electrically connected with a first semiconductor refrigerator (112), the first semiconductor refrigerator (112) is fixedly connected with a circulating heat dissipation pipeline (113) through a connecting pipeline, and the circulating heat dissipation pipeline (113) is wound on the surface of the drilling motor (6).
4. An electric control system applied to oilfield drilling according to claim 2, wherein: the air-cooled heat dissipation system (12) comprises an air pump (121), the air pump (121) is electrically connected with a second semiconductor refrigerator (122), the second semiconductor refrigerator (122) is fixedly connected with a heat dissipation spray head (123) through a connecting pipeline, and the heat dissipation spray head (123) is located on the surface of the drilling motor (6).
5. The electric control system applied to oilfield drilling according to claim 1, wherein: the sensing system (2) comprises a temperature sensor (21), a timer (23) and a database (22).
6. The electric control system applied to oilfield drilling according to claim 1, wherein: the warning system (3) comprises a normal work prompt lamp (31), a high-temperature prompt lamp (32), a buzzer (33) and a fault signal transmitter (34), wherein the fault signal transmitter (34) is electrically connected with the microprocessor (4).
7. The electric control system applied to oilfield drilling according to claim 1, wherein: the frequency conversion system (7) comprises a frequency converter (71) and a torque detector (72).
8. The electric control system applied to oilfield drilling according to claim 1, wherein: the remote control system (5) comprises a signal transmitter (52) and a signal receiver (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110916392.6A CN113882835A (en) | 2021-08-11 | 2021-08-11 | Electric control system applied to oil field drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110916392.6A CN113882835A (en) | 2021-08-11 | 2021-08-11 | Electric control system applied to oil field drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113882835A true CN113882835A (en) | 2022-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110916392.6A Pending CN113882835A (en) | 2021-08-11 | 2021-08-11 | Electric control system applied to oil field drilling |
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| CN (1) | CN113882835A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2899283Y (en) * | 2006-05-01 | 2007-05-09 | 酒泉市广通电器有限责任公司 | Control cabinet of oil sucker |
| CN204984258U (en) * | 2015-09-07 | 2016-01-20 | 温州博远工业设计有限公司 | Traffic engineering road drilling machine |
| CA2971746A1 (en) * | 2017-04-02 | 2018-10-02 | Global Heat Transfer Ulc | Improved heat exchanger unit |
| CN208168806U (en) * | 2018-04-18 | 2018-11-30 | 郭金勇 | A kind of monitoring system for drilling well water-cooled brake cooling water tank |
| CN109774407A (en) * | 2018-12-10 | 2019-05-21 | 江苏大学 | A kind of heat management system and its control method and vehicle |
| CN110552857A (en) * | 2019-08-12 | 2019-12-10 | 中国海洋石油集团有限公司 | electrically driven well cementing equipment and adjusting method |
| CN110905488A (en) * | 2019-10-15 | 2020-03-24 | 金钻石油机械股份有限公司 | Drilling equipment running state acquisition monitoring devices |
| CN212225192U (en) * | 2020-03-31 | 2020-12-25 | 中国石油天然气股份有限公司长庆油田分公司第八采油厂 | Intelligent relay type supercharging water injection screw pump device |
| CN112177518A (en) * | 2020-09-29 | 2021-01-05 | 中油国家油气钻井装备工程技术研究中心有限公司 | Linkage control method for drilling drive motor host and cooling fan |
| CN213235032U (en) * | 2020-08-19 | 2021-05-18 | 四川中曼电气工程技术有限公司 | Single-machine and double-machine switching control system of petroleum machinery drilling machine |
-
2021
- 2021-08-11 CN CN202110916392.6A patent/CN113882835A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2899283Y (en) * | 2006-05-01 | 2007-05-09 | 酒泉市广通电器有限责任公司 | Control cabinet of oil sucker |
| CN204984258U (en) * | 2015-09-07 | 2016-01-20 | 温州博远工业设计有限公司 | Traffic engineering road drilling machine |
| CA2971746A1 (en) * | 2017-04-02 | 2018-10-02 | Global Heat Transfer Ulc | Improved heat exchanger unit |
| CN208168806U (en) * | 2018-04-18 | 2018-11-30 | 郭金勇 | A kind of monitoring system for drilling well water-cooled brake cooling water tank |
| CN109774407A (en) * | 2018-12-10 | 2019-05-21 | 江苏大学 | A kind of heat management system and its control method and vehicle |
| CN110552857A (en) * | 2019-08-12 | 2019-12-10 | 中国海洋石油集团有限公司 | electrically driven well cementing equipment and adjusting method |
| CN110905488A (en) * | 2019-10-15 | 2020-03-24 | 金钻石油机械股份有限公司 | Drilling equipment running state acquisition monitoring devices |
| CN212225192U (en) * | 2020-03-31 | 2020-12-25 | 中国石油天然气股份有限公司长庆油田分公司第八采油厂 | Intelligent relay type supercharging water injection screw pump device |
| CN213235032U (en) * | 2020-08-19 | 2021-05-18 | 四川中曼电气工程技术有限公司 | Single-machine and double-machine switching control system of petroleum machinery drilling machine |
| CN112177518A (en) * | 2020-09-29 | 2021-01-05 | 中油国家油气钻井装备工程技术研究中心有限公司 | Linkage control method for drilling drive motor host and cooling fan |
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