CN112443318A - Optical cable positioning device and method in oil well, and sleeve fracturing system and method - Google Patents
Optical cable positioning device and method in oil well, and sleeve fracturing system and method Download PDFInfo
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- CN112443318A CN112443318A CN202011493732.0A CN202011493732A CN112443318A CN 112443318 A CN112443318 A CN 112443318A CN 202011493732 A CN202011493732 A CN 202011493732A CN 112443318 A CN112443318 A CN 112443318A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 81
- 239000003129 oil well Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000013013 elastic material Substances 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims description 2
- 239000013307 optical fiber Substances 0.000 description 5
- 239000003208 petroleum Substances 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/119—Details, e.g. for locating perforating place or direction
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses an optical cable positioning device and a positioning method in an oil well, and a casing fracturing system and a casing fracturing method, wherein the positioning device comprises a plurality of positioning arms made of elastic materials and a telescopic mechanism for expanding or stretching the positioning arms and positioning in the oil well, and each positioning arm is provided with a vibrating device, a driving circuit for driving the vibrating device and a power supply for supplying power to the driving circuit; the two ends of all the positioning arms are fixed on the telescopic mechanism, and the end parts of all the telescopic arms positioned on the same side of the telescopic mechanism are positioned on the same circumferential surface; the heights of the vibration devices on each positioning arm are the same, and the vibration signals sent by the vibration devices are different. The positioning device provided by the scheme solves the problem that the position of the existing optical cable is difficult to determine after the optical cable is lowered into the well, so that the optical cable can be damaged in the sleeve pressing process.
Description
Technical Field
The invention belongs to the technical field of oil-gas exploration, and particularly relates to an optical cable positioning device and method in an oil well, and a casing fracturing system and method.
Background
Petroleum is an extremely important material, and with the rapid development of the Chinese society, the consumption of petroleum in China is in the first position in the world for a long time, while with the reduction of petroleum resources, the exploitation difficulty is increased, the resource consumption is increased, and the external dependence degree is increased, which has adverse effect on the national safety. The method has the advantages that the exploration and development strength is increased, a new technology is developed, the traditional exploration cost is reduced, and the petroleum yield is improved, so that the important direction for solving the national energy shortage is provided. Oil and gas resources are usually exploited by adopting an oil well staged fracturing measure to press the casing out of cracks, so that oil can smoothly flow into the casing.
The optical fiber has the advantages of corrosion resistance, high temperature resistance, strong anti-interference capability, high reliability, low engineering application cost and the like, so that the optical fiber can better resist the view of the severe environment in the oil well entering the oil exploration industry along with the severe environment, currently, the distributed optical fiber sensor technology has huge application potential in the oil and gas exploitation field, and the optical fiber is used as a seismic detector to replace the traditional electronic seismic detector, so that the seamless detection in the well is realized.
When the distributed optical fiber sensing technology is applied to oil wells, particularly oil wells for exploitation, one of the basic conditions for acquiring high-quality signals is that the optical cable is intact, after the optical cable is laid, the position of the optical cable in a sleeve is uncertain, and if the fracturing technology is implemented fraudulently, the optical cable can be damaged, and subsequent data acquisition is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the device and the method for positioning the optical cable in the oil well, and the system and the method for fracturing the casing provided by the invention solve the problem that the optical cable is possibly damaged in the process of pressing the casing because the position of the optical cable is difficult to determine after the existing optical cable is put into the well.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
the first aspect provides an optical cable positioning device in an oil well, which comprises a plurality of positioning arms made of elastic materials and a telescopic mechanism for expanding or stretching the positioning arms and positioning in the oil well, wherein each positioning arm is provided with a vibration device, a driving circuit for driving the vibration device and a power supply for supplying power to the driving circuit;
the two ends of all the positioning arms are fixed on the telescopic mechanism, and the end parts of all the telescopic arms positioned on the same side of the telescopic mechanism are positioned on the same circumferential surface; the heights of the vibration devices on each positioning arm are the same, and the vibration signals sent by the vibration devices are different.
In a second aspect, a method for positioning an optical cable using an in-well optical cable positioning device is provided, comprising:
s1, connecting a telescopic mechanism of the optical cable positioning device in the oil well with the connecting rod, and moving the optical cable positioning device in the oil well to a preset position through the connecting rod;
s2, starting the telescopic mechanism, and expanding the positioning arm by the shortened telescopic mechanism until the positioning arm is contacted with the inner wall of the sleeve;
s3, sending out vibration signals at intervals by adopting all vibration devices, and demodulating vibration information sent out by all positioning arms and received by the optical cable by adopting a demodulation device;
and S4, acquiring the strongest vibration signal obtained by demodulation, and calculating the position information of the positioning arm with the strongest vibration signal as the position of the optical cable according to the positioning information of the telescopic mechanism and the relative position between the positioning arms.
The third aspect provides an oil well inner casing fracturing system, which comprises a plurality of positioning arms made of elastic materials, telescopic rods used for expanding/stretching the positioning arms and perforating guns fixed at the tail ends of the telescopic rods, wherein each positioning arm is provided with a vibrating device, a driving circuit used for driving the vibrating device and a power supply used for supplying power to the driving circuit;
the two ends of all the positioning arms are fixed on the telescopic rod, and the end parts of all the telescopic arms positioned on the same side of the telescopic rod are positioned on the same circumferential surface; the heights of the vibration devices on each positioning arm are the same, and the vibration signals sent by the vibration devices are different.
In a fourth aspect, a method of fracturing a casing with an oil well casing fracturing system is provided, comprising:
a1, connecting a telescopic rod of the oil well inner casing fracturing system with the connecting rod, and moving the oil well inner casing fracturing system to a preset position through the connecting rod;
a2, starting the telescopic rod, and expanding the positioning arm by the shortened telescopic rod until the positioning arm is contacted with the inner wall of the sleeve;
a3, sending out vibration signals at intervals by adopting all vibration devices, and demodulating vibration information sent out by all positioning arms and received by an optical cable by adopting a demodulation device;
a4, acquiring the strongest vibration signal obtained by demodulation, and calculating the position information of the positioning arm of the strongest vibration signal as the position of the optical cable according to the positioning information acquired by the perforating gun and the relative position between the positioning arms;
and A5, adjusting the muzzle of the perforating gun to avoid the optical cable according to the position of the optical cable, and then performing fracturing operation on the casing.
The invention has the beneficial effects that: the positioning arm is fixed on the same circumferential surface of the telescopic mechanism, so that when the positioning arm enters the sleeve to position the optical cable, the sleeve is divided into a plurality of small areas, and when the vibration arm corresponding to the strongest vibration signal obtained by demodulation is determined, the positioning device based on the telescopic mechanism can position the specific area of the positioning arm in the sleeve, namely the specific area of the optical cable close to the sleeve is found.
The position of the gun muzzle of the perforating gun can be adjusted according to the specific region position of the optical cable close to the sleeve in the oil well fracturing process, so that the gun muzzle is kept away from the optical cable, the optical cable is prevented from being damaged, the fracture risk of the optical cable is reduced, the service efficiency of the optical cable is improved, and a foundation is laid for oil well oil and gas exploration by using a light sensing technology subsequently.
When the positioning arm is combined with the perforating gun for use, the fracturing can be carried out while the optical cable is positioned, the working efficiency is improved, and meanwhile, the positioning modules and the cost are reduced. In addition, the device, the system and the method provided by the scheme are suitable for various well conditions including a vertical well, an inclined well, a horizontal well and the like.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an optical cable positioning device in an oil well.
FIG. 2 is a schematic view of the positioning arm of the cable positioning device in the oil well of FIG. 1 in compression after the positioning device is disposed in the casing.
FIG. 3 is a flow chart of a method for positioning a cable by a cable positioning device in an oil well.
Fig. 4 is a schematic structural diagram of a fracturing system for an oil well casing.
Wherein, 1, a positioning arm; 2. a telescoping mechanism; 21. a telescopic rod; 22. a positioning module; 3. a vibrating device; 4. an optical cable; 5. a sleeve; 6. a demodulating means; 7. a connecting rod; 8. a perforating gun.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1 and 2, the optical cable positioning device in the oil well provided by the present scheme includes a plurality of positioning arms 1 made of elastic materials and a telescopic mechanism 2 for expanding or stretching the positioning arms 1 and positioning in the oil well, wherein each positioning arm 1 is provided with a vibration device 3, a driving circuit for driving the vibration device 3, and a power supply for supplying power to the driving circuit.
The two ends of all the positioning arms 1 are fixed on the telescopic mechanism 2, and the end parts of all the telescopic arms positioned on the same side of the telescopic mechanism 2 are positioned on the same circumferential surface; the heights of the vibration devices 3 on each positioning arm 1 are the same, and the vibration signals sent by the vibration devices are different.
The vibration signals on all the positioning arms 1 are different in a manner that the vibration devices 3 send vibration signals with different frequencies, or the vibration devices 3 on each positioning arm 1 send vibration signals with different codes. The vibration device 3 on each positioning arm 1 sends out vibration signals with different frequencies, or the vibration device 3 on each positioning arm 1 sends out vibration signals with different codes.
After the above-mentioned optical cable positioner in the oil well of this scheme adoption, the flexible arm that is located telescopic machanism 2 can divide into a plurality of regions with sleeve pipe 5, and the analytic device that deuterogamies and be connected with optical cable 4 can determine that the vibration signal of which department is strongest to can accurately determine the position that optical cable 4 is located sleeve pipe 5.
In implementation, the telescopic mechanism 2 of the present embodiment preferably includes a telescopic rod 21 for mounting the positioning arm 1 and a positioning module 22 mounted on the telescopic rod 21 not located between the two ends of the positioning arm 1. The positioning module 22 is a three-axis acceleration sensor.
After the telescopic mechanism 2 adopts the structure, the optical cables 4 at all positions needing fracturing of the sleeve 5 can be positioned firstly, and after all the positions needing fracturing are determined, the perforating gun 8 is adopted to avoid the optical cables 4 in the sleeve 5 based on the recorded positions of the optical cables 4.
When fracturing the casing 5, the optical cable 4 of all places needing fracturing in the casing 5 can be positioned by adopting an optical cable positioning device in an oil well, and then fracturing operation is uniformly carried out by adopting a perforating gun 8; also can fix the optical cable positioner in the oil well of this scheme and perforation rifle 8, adopt positioner to fix a position the optical cable earlier during the use, directly adjust the position of 8 muzzles of perforation rifle after the location is accomplished, carry out fracturing operation, later get into the next position that needs fracturing of sleeve pipe again and carry out optical cable location and sleeve pipe fracturing operation.
As shown in fig. 2, the vibration device 3 is installed at the highest point of the arc of the positioning arm 1 when the positioning arm 1 is expanded to the maximum arc. With the vibration device 3 in this installed position, the vibration signal is most efficiently transmitted to the casing wall when the positioning arm 1 is expanded to contact the casing wall.
Referring to fig. 3, fig. 3 shows a flow chart of a method of positioning a fiber optic cable 4 by an optical cable positioning device within an oil well; as shown in fig. 4, the method includes steps S1 through S4.
In step S1, connecting the telescoping mechanism 2 of the optical cable positioning device in the oil well with the connecting rod 7, and moving the optical cable positioning device in the oil well to a preset position through the connecting rod 7;
in step S2, the telescoping mechanism 2 is started, and the shortened telescoping mechanism 2 expands the positioning arm 1 until the positioning arm 1 contacts the inner wall of the casing 5;
in practice, the following two methods can be used to determine whether the locator arm 1 is in contact with the inner wall of the casing 5, the first method being:
starting the vibration device 3 to send out vibration signals at intervals, and judging whether the number of the vibration signals demodulated by the demodulation device 6 is more than or equal to 1; if so, the positioning arm 1 is contacted with the inner wall of the sleeve 5, otherwise, the telescopic mechanism 2 continues to expand the positioning arm 1.
The second method is as follows: and adjusting the telescopic mechanism 2 to shorten the preset length, so that the positioning arms 1 are in the maximum expansion amount, and the maximum section diameter of the structure formed by all the positioning arms is larger than the diameter of the sleeve.
In step S3, all the vibration devices 3 are used to send out vibration signals at intervals, and the demodulation device 6 is used to demodulate the vibration information sent out by all the positioning arms 1 received by the optical cable 4; the preferred demodulation device of this scheme is DAS instrument.
Specifically, the optical cable receives vibration information sent by all positioning arms 1, the DAS instrument demodulates position information of each positioning arm, and when the received vibration signal of a certain positioning arm is strongest, the optical cable is considered to be near the positioning arm, so that the position information of the optical cable at the specified sleeve position can be determined.
In step S4, the strongest vibration signal obtained by demodulation is acquired, and the position information of the positioning arm 1 of the strongest vibration signal is calculated as the position of the optical cable 4 based on the positioning information of the telescopic mechanism 2 and the relative position between the positioning arms 1.
After the optical cable position of the optical cable positioning device in the oil well at the preset position in the casing 5 is positioned or the fracturing is completed, the telescopic mechanism 2 is started to extend, the positioning arm 1 can be extended to move to the next preset position of the casing 5, and the steps S2 to S4 are repeated to position the position of the optical cable 4.
Specific description of the position information of the locator arm 1 for calculating the strongest vibration signal:
on the telescopic mechanism 2, once the position of the positioning module 22 on the telescopic mechanism relative to the positioning arms 1 is determined, the relative position of each positioning arm 1 is fixed and known, the position of a certain positioning arm 1 in an oil well can be determined through the position information of the positioning module 22, and the positions of all the positioning arms 1 in the oil well can be calculated according to the relative position relation between the positioning arms 1.
When the scheme is implemented, the axis of the telescopic mechanism 2 is preferably superposed with the axis of the sleeve 5; thus, it is ensured that all the positioning arms 1 are in contact with the inner wall of the casing 5 at the same time, and the pressure between the positioning arms and the inner wall is substantially the same, so that the vibration signal is transmitted to the casing wall most effectively.
In conclusion, after optical cable 4 is laid, adopt external connecting rod 7, can remove the positioner of this scheme to the well optional position, utilize positioner to obtain the accurate position of optical cable 4 on sleeve pipe 5 to avoid damaging optical cable 4 at oil well fracturing in-process, reduce optical cable 4 fracture risk.
As shown in fig. 4, the present scheme further provides an oil well casing fracturing system, which includes a plurality of positioning arms 1 made of elastic materials, and a telescopic rod 21 for expanding/stretching the positioning arms 1, wherein each positioning arm 1 is provided with a vibration device 3, a driving circuit for driving the vibration device 3, and a power supply for supplying power to the driving circuit.
Both ends of all the positioning arms 1 are fixed on the telescopic rod 21, and the end parts of all the telescopic arms positioned on the same side of the telescopic rod 21 are positioned on the same circumferential surface; the heights of the vibration devices 3 on each positioning arm 1 are the same, and the vibration signals sent by the vibration devices are different.
Compared with an optical cable positioning device in an oil well, the perforating gun 8 is added to the oil well inner sleeve pipe fracturing system, and the perforating gun 8 is provided with the positioning module, so that the positioning module does not need to be additionally added to the oil well inner sleeve pipe fracturing system relative to the positioning device.
Except for the above mentioned different positions, other parts of the device for positioning the oil well inner casing fracturing system relative to the oil well inner optical cable are identical in structure and function, and are not described again here.
The method for fracturing the casing by adopting the oil well inner casing fracturing system comprises the following steps:
a1, connecting an expansion link 21 of the oil well inner casing fracturing system with the connecting rod 7, and moving the oil well inner casing fracturing system to a preset position through the connecting rod 7;
a2, starting the telescopic rod 21, and expanding the positioning arm 1 by the shortened telescopic rod 21 until the positioning arm 1 is contacted with the inner wall of the sleeve 5;
a3, sending vibration signals at intervals by adopting all vibration devices 3, and demodulating vibration information sent by all positioning arms 1 received by the optical cable by adopting a demodulation device 6;
a4, acquiring the strongest vibration signal obtained by demodulation, and calculating the position information of the positioning arm 1 of the strongest vibration signal as the position of the optical cable according to the positioning information acquired by the perforating gun 8 and the relative position between the positioning arms 1;
a5, adjusting the muzzle of the perforating gun 8 to avoid the optical cable according to the position of the optical cable, and then performing fracturing operation on the casing 5.
In conclusion, when the positioning arm 1 is used in combination with the perforating gun 8, the optical cable can be positioned and fractured simultaneously, the working efficiency is improved, and meanwhile, the number of positioning modules is reduced, and the cost is reduced.
Claims (10)
1. The optical cable positioning device in the oil well is characterized by comprising a plurality of positioning arms made of elastic materials and a telescopic mechanism for expanding or stretching the positioning arms and positioning in the oil well, wherein each positioning arm is provided with a vibration device, a driving circuit for driving the vibration device and a power supply for supplying power to the driving circuit;
the two ends of all the positioning arms are fixed on the telescopic mechanism, and the end parts of all the telescopic arms positioned on the same side of the telescopic mechanism are positioned on the same circumferential surface; the heights of the vibration devices on each positioning arm are the same, and the vibration signals sent by the vibration devices are different.
2. The in-well optical cable positioning device of claim 1, wherein the telescoping mechanism comprises a telescoping rod for mounting the positioning arm and a positioning module mounted on the telescoping rod not between the ends of the positioning arm.
3. The device as claimed in claim 1 or 2, wherein the vibration device is installed at the highest point of the arc of the positioning arm when the positioning arm is expanded to the maximum arc.
4. An optical cable positioning apparatus in an oil well according to claim 1 or 2, characterized in that the vibration signals on all positioning arms are different in such a way that the vibration apparatus emits vibration signals of different frequencies, or the vibration apparatus on each positioning arm emits vibration signals of different codes.
5. A method of positioning a fiber optic cable using the in-well cable positioning device of any of claims 1-4, comprising:
s1, connecting a telescopic mechanism of the optical cable positioning device in the oil well with the connecting rod, and moving the optical cable positioning device in the oil well to a preset position through the connecting rod;
s2, starting the telescopic mechanism, and expanding the positioning arm by the shortened telescopic mechanism until the positioning arm is contacted with the inner wall of the sleeve;
s3, sending out vibration signals at intervals by adopting all vibration devices, and demodulating vibration information sent out by all positioning arms and received by the optical cable by adopting a demodulation device;
and S4, acquiring the strongest vibration signal obtained by demodulation, and calculating the position information of the positioning arm with the strongest vibration signal as the position of the optical cable according to the positioning information of the telescopic mechanism and the relative position between the positioning arms.
6. The method of claim 5, wherein determining that the locator arm is in contact with the inner wall of the cannula comprises:
starting the vibration device to send out vibration signals at intervals, and judging whether the number of the vibration signals demodulated by the demodulation device is more than or equal to 1;
if so, the positioning arm is contacted with the inner wall of the sleeve, otherwise, the telescopic mechanism continues to expand the positioning arm.
7. The method of claim 5, wherein the positioning arms are positioned to contact the inner wall of the casing by adjusting the telescoping mechanism to shorten the predetermined length to a maximum amount of expansion of the positioning arms, wherein the maximum cross-sectional diameter of the structure formed by all the positioning arms is greater than the casing diameter.
8. The method of claim 5, wherein an axis of the telescoping mechanism coincides with an axis of the cannula.
9. The fracturing system for the inner sleeve of the oil well is characterized by comprising a plurality of positioning arms made of elastic materials, telescopic rods used for expanding/stretching the positioning arms and perforating guns fixed at the tail ends of the telescopic rods, wherein each positioning arm is provided with a vibrating device, a driving circuit for driving the vibrating device and a power supply used for supplying power to the driving circuit;
the two ends of all the positioning arms are fixed on the telescopic rod, and the end parts of all the telescopic arms positioned on the same side of the telescopic rod are positioned on the same circumferential surface; the heights of the vibration devices on each positioning arm are the same, and the vibration signals sent by the vibration devices are different.
10. A method of fracturing a casing using the oil well casing fracturing system of claim 9, comprising:
a1, connecting a telescopic rod of the oil well inner casing fracturing system with the connecting rod, and moving the oil well inner casing fracturing system to a preset position through the connecting rod;
a2, starting the telescopic rod, and expanding the positioning arm by the shortened telescopic rod until the positioning arm is contacted with the inner wall of the sleeve;
a3, sending out vibration signals at intervals by adopting all vibration devices, and demodulating vibration information sent out by all positioning arms and received by an optical cable by adopting a demodulation device;
a4, acquiring the strongest vibration signal obtained by demodulation, and calculating the position information of the positioning arm of the strongest vibration signal as the position of the optical cable according to the positioning information acquired by the perforating gun and the relative position between the positioning arms;
and A5, adjusting the muzzle of the perforating gun to avoid the optical cable according to the position of the optical cable, and then performing fracturing operation on the casing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011493732.0A CN112443318A (en) | 2020-12-17 | 2020-12-17 | Optical cable positioning device and method in oil well, and sleeve fracturing system and method |
| CN202111156982.XA CN113719276A (en) | 2020-12-17 | 2021-09-30 | Optical cable positioning device and method in oil well, and sleeve fracturing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011493732.0A CN112443318A (en) | 2020-12-17 | 2020-12-17 | Optical cable positioning device and method in oil well, and sleeve fracturing system and method |
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| CN112443318A true CN112443318A (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011493732.0A Withdrawn CN112443318A (en) | 2020-12-17 | 2020-12-17 | Optical cable positioning device and method in oil well, and sleeve fracturing system and method |
| CN202111156982.XA Pending CN113719276A (en) | 2020-12-17 | 2021-09-30 | Optical cable positioning device and method in oil well, and sleeve fracturing system and method |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111156982.XA Pending CN113719276A (en) | 2020-12-17 | 2021-09-30 | Optical cable positioning device and method in oil well, and sleeve fracturing system and method |
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| CN (2) | CN112443318A (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114841B (en) * | 2013-02-01 | 2015-10-14 | 中国石油天然气股份有限公司 | The concentric direct-reading measurement and adjustment instrument of bridge-type |
| CN103362460B (en) * | 2013-07-24 | 2015-04-15 | 武汉海王机电工程技术公司 | Dislocated support-type centering guide for cased well logger |
| CN203420648U (en) * | 2013-07-24 | 2014-02-05 | 武汉海王机电工程技术公司 | Staggered supporting type centralizer of cased well logger |
| CN104818952A (en) * | 2015-04-27 | 2015-08-05 | 中国石油大学(北京) | Underground electromagnetic control damping elastic centralizing device and control method |
| CN204677127U (en) * | 2015-04-27 | 2015-09-30 | 中国石油大学(北京) | A kind of downhole electromagnetic regulates damping type elasticity erection device |
| CN207960599U (en) * | 2018-03-15 | 2018-10-12 | 中石化石油工程技术服务有限公司 | A kind of well logging optical cable pushing device |
| CN217106979U (en) * | 2020-12-17 | 2022-08-02 | 中油奥博(成都)科技有限公司 | Optical cable positioning device and casing fracturing system in oil well |
| CN112814660A (en) * | 2021-03-02 | 2021-05-18 | 冉曾令 | Optical cable positioning device and method in oil well, and sleeve fracturing system and method |
-
2020
- 2020-12-17 CN CN202011493732.0A patent/CN112443318A/en not_active Withdrawn
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2021
- 2021-09-30 CN CN202111156982.XA patent/CN113719276A/en active Pending
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Application publication date: 20210305 |