CN217106979U - Optical cable positioning device and casing fracturing system in oil well - Google Patents
Optical cable positioning device and casing fracturing system in oil well Download PDFInfo
- Publication number
- CN217106979U CN217106979U CN202122390048.6U CN202122390048U CN217106979U CN 217106979 U CN217106979 U CN 217106979U CN 202122390048 U CN202122390048 U CN 202122390048U CN 217106979 U CN217106979 U CN 217106979U
- Authority
- CN
- China
- Prior art keywords
- positioning
- vibration
- arms
- optical cable
- oil well
- Prior art date
- 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.)
- Active
Links
Images
Landscapes
- Light Guides In General And Applications Therefor (AREA)
Abstract
The utility model discloses an optical cable positioning device and a sleeve fracturing system in an oil well, 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 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. 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 utility model belongs to the technical field of oil gas surveys, concretely relates to optical cable positioner and positioning method, sleeve pipe fracturing system and method in oil well.
Background
Petroleum is an extremely important material, and as petroleum resources are reduced, the exploitation difficulty is increased, the resource consumption is increased, and the external dependence degree is increased, which has adverse effect on 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. The exploitation of oil and gas resources usually adopts oil well staged fracturing measures 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.
SUMMERY OF THE UTILITY MODEL
The above-mentioned not enough to prior art, the utility model provides an optical cable positioner and positioning method, sleeve pipe fracturing system and method in the oil well have solved current optical cable and have gone into the pit the back optical cable position and be difficult to confirm for the sleeve pipe is exerted pressure the in-process and may be damaged the problem of optical cable.
In order to achieve the purpose of the invention, the utility model 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.
The second 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 through damping short 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.
The utility model has the advantages 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 optical cable can be positioned and the fracturing can be carried out, so that the working efficiency is improved, and a positioning module is not needed during the fracturing operation, so that the cost is 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; 9. shock attenuation quarter butt.
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 various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.
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. 3, 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 to 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.
When the number n of the positioning arms 1 is less than or equal to 3, the step A3 also includes rotating the connecting rods at the same time when the vibration signals are sent at intervals. By the arrangement, each position of the sleeve can be detected, so that the position information of the positioning arm corresponding to the strongest vibration signal at a certain moment can be found.
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, an expansion link 21 for expanding/stretching the positioning arms 1, and a perforating gun 8 fixed at the end of the expansion link 21 through a damping short rod 9, wherein each positioning arm 1 is provided with a vibrating device 3, a driving circuit for driving the vibrating device 3, and a power supply for supplying power to the driving circuit.
After the shock absorption short rod 9 is added and subtracted between the telescopic rod 21 and the perforating gun 8, all structural parts above the shock absorption short rod 9 can be prevented from being damaged by strong vibration caused by the working of the perforating gun 8.
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 a positioning module, so that the additional positioning module is not needed to be added to the oil well inner sleeve pipe fracturing system relative to the positioning device.
In order to further improve the positioning accuracy of the oil well casing fracturing system, the oil well casing fracturing system can be further provided with a positioning module besides the positioning module of the perforating gun 8, and the additional positioning module is arranged on the telescopic rod 21 at any one of the two ends of the positioning arm 1.
Except the above mentioned different parts, other parts of the device for positioning the sleeve fracturing system in the oil well relative to the optical cable in the oil well have the same 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 (4)
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; the telescopic mechanism comprises a telescopic rod used for installing a positioning arm and a positioning module which is not arranged on the telescopic rod between the two ends of the positioning arm.
2. The device as claimed in claim 1, wherein the vibration device is mounted at the highest point of the arc of the positioning arm when the positioning arm is expanded to the maximum arc.
3. The in-well cable positioning device of claim 1, wherein the vibration signals on all positioning arms are different in such a way that the vibration devices emit vibration signals of different frequencies, or the vibration devices on each positioning arm emit vibration signals of different codes.
4. 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 through damping short 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;
the oil well inner casing fracturing system further comprises a positioning module, and the positioning module is installed on the telescopic rod at any one of the two ends of the positioning arm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020230580435 | 2020-12-17 | ||
| CN202023058043 | 2020-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217106979U true CN217106979U (en) | 2022-08-02 |
Family
ID=82576635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122390048.6U Active CN217106979U (en) | 2020-12-17 | 2021-09-30 | Optical cable positioning device and casing fracturing system in oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217106979U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719276A (en) * | 2020-12-17 | 2021-11-30 | 中油奥博(成都)科技有限公司 | Optical cable positioning device and method in oil well, and sleeve fracturing system and method |
| CN118257553A (en) * | 2024-05-31 | 2024-06-28 | 成都若克石油技术开发有限公司 | Control system, method and device for high-temperature perforating gun |
-
2021
- 2021-09-30 CN CN202122390048.6U patent/CN217106979U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719276A (en) * | 2020-12-17 | 2021-11-30 | 中油奥博(成都)科技有限公司 | Optical cable positioning device and method in oil well, and sleeve fracturing system and method |
| CN113719276B (en) * | 2020-12-17 | 2024-10-18 | 中油奥博(成都)科技有限公司 | Optical cable positioning device and method in oil well, and casing fracturing system and method |
| CN118257553A (en) * | 2024-05-31 | 2024-06-28 | 成都若克石油技术开发有限公司 | Control system, method and device for high-temperature perforating gun |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217106979U (en) | Optical cable positioning device and casing fracturing system in oil well | |
| CN109116411B (en) | Microseismic sensors are fixed and recyclable device in a kind of hole suitable for different pore size | |
| US10590708B2 (en) | Mechanics experiment system and method for perforated string in underground perforating blasting of oil-gas well | |
| CN107870351B (en) | Method for installing in-hole and out-hole dual-fixing recyclable microseismic sensor | |
| CN105974465A (en) | Tunnel three-dimensional seismic wave advanced detection space observation system and tunnel three-dimensional seismic wave advanced detection space observation method | |
| CN101235716B (en) | Prealarming method and method for avoiding oil gas well drilling neighbouring wellbore collision | |
| CN112814660A (en) | Optical cable positioning device and method in oil well, and sleeve fracturing system and method | |
| CN110736538A (en) | vibration monitor applied in depth direction and monitoring method | |
| CN111239257B (en) | Ultrasonic probe introduction and coupling device, rock mass acoustic wave detection device and method | |
| CN103775073B (en) | A kind of getting working face geostatic stress distribution characteristics detection method | |
| CN112443318A (en) | Optical cable positioning device and method in oil well, and sleeve fracturing system and method | |
| AU2020102355A4 (en) | Embedded microseismic monitoring device with tbm | |
| CN111880270B (en) | Vertical seismic profile optical cable well descending device, oil and gas exploration system and well descending method | |
| CN106772564A (en) | A kind of microseismic monitoring sensor erecting device and installation method | |
| CN112068267A (en) | Underground casing optical cable radiation avoiding method and system | |
| NO333419B1 (en) | Method and apparatus for placing acoustic devices in a borehole | |
| CN211370387U (en) | Shale natural frequency's detection device in shale gas well | |
| CN212454399U (en) | Sleeve type ground stress test matching positioning and ranging device | |
| CN204163718U (en) | Wire signal conduction device | |
| CN210068134U (en) | Press-in type electromagnetic wave measurement while drilling system | |
| CN110965998A (en) | Detection device and detection method for shale natural frequency in shale gas well | |
| CN110161558A (en) | A kind of high efficiency elasticity wave-exciting device used convenient for exploration | |
| CN113482536A (en) | Hole expanding device for intelligently detecting hole diameter of anchor cable hole expanding section | |
| CN111610557A (en) | Oil exploration detection device and method based on 5G communication | |
| LU505301B1 (en) | Laying device and laying method of optical fiber sensor for monitoring deformation of anchor rod |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |