CN115507762A - Oil casing internal diameter measuring device - Google Patents
Oil casing internal diameter measuring device Download PDFInfo
- Publication number
- CN115507762A CN115507762A CN202211307422.4A CN202211307422A CN115507762A CN 115507762 A CN115507762 A CN 115507762A CN 202211307422 A CN202211307422 A CN 202211307422A CN 115507762 A CN115507762 A CN 115507762A
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- mounting cylinder
- cylinder
- module
- communication
- measuring device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
- G01B11/254—Projection of a pattern, viewing through a pattern, e.g. moiré
Abstract
The invention discloses a measuring device for the inner diameter of an oil casing in the technical field of well logging, which comprises: the measuring mechanism comprises a light source module, a camera module coaxially arranged on the end face of the light source module and a communication assembly coaxially arranged on one end, far away from the light source module, of the camera module; the light source module comprises a first mounting cylinder and a structured light code arranged on the outer circumferential side wall of the first mounting cylinder; the camera module comprises a second mounting cylinder coaxially arranged on the end face of the first mounting cylinder and a conical cylinder coaxially arranged on the second mounting cylinder, close to one end of the first mounting cylinder and connected with the first mounting cylinder.
Description
Technical Field
The invention relates to the technical field of well logging, in particular to an oil casing inner diameter measuring device.
Background
The multi-arm caliper performs contact measurement on the inner diameter of the oil casing through a plurality of mechanical measuring arms (also called caliper legs) which are distributed circumferentially. Taking a cantilever caliper as an example, during measurement, the caliper is lowered to a preset depth, then the measuring cantilever is opened, the measuring cantilever is stretched outwards under the action of a spring force, and the tail end of the measuring cantilever is in frictional contact with the borehole wall. In the lifting process of the instrument, the measuring arm generates radial displacement along with the change of the inner wall of the oil casing, the radial displacement of the measuring arm is converted into axial displacement through the sensor, then the displacement is processed, encoded and sent to the ground, the ground system finishes the acquisition and processing work, and finally the measurement result of the well diameter is obtained through interpretation software.
The multi-arm caliper can only measure the data of the position of the mechanical measuring arm, and the intermittent resolution of the circumferential upper measuring point is low. The speed measurement is slow in the longitudinal direction, typically 600m/h, with a sampling rate of 64 points/m, at which the longitudinal resolution is 15.6mm. The mechanical parts such as the measuring arm and the like are designed in an open mode, gaps among the parts are small, the accuracy of data recording is easily influenced by solid-phase invasion and foreign-body suspension in construction, and instruments are damaged in serious cases.
Disclosure of Invention
The invention aims to provide an oil casing inner diameter measuring device, which solves the problems that the circumferential upper measuring point of a multi-arm caliper provided in the background technology has low discontinuous resolution, the longitudinal upper speed measurement is slow, mechanical parts such as measuring arms are easy to be affected by solid-phase invasion and foreign-body suspension to influence the accuracy of data recording, and the instrument is damaged in serious cases.
In order to achieve the purpose, the invention provides the following technical scheme: an oil casing inner diameter measuring device, comprising:
the measuring mechanism comprises a light source module, a camera module coaxially mounted on the end face of the light source module, and a communication assembly coaxially arranged on one end, far away from the light source module, of the camera module;
the light source module comprises a first mounting cylinder and a structured light code arranged on the outer side wall of the circumference of the first mounting cylinder, the structured light code is transparent, a laser emitter is mounted in the inner cavity of the first mounting cylinder, and the laser emitter corresponds to the structured light code;
the camera module comprises a second mounting cylinder coaxially arranged on the end face of the first mounting cylinder, a conical cylinder coaxially arranged on the second mounting cylinder, close to one end of the first mounting cylinder and connected with the first mounting cylinder, and a camera annularly arranged on the circumferential outer side wall of the conical cylinder;
the communication subassembly includes and is in with the axle center setting keep away from on the second installation section of thick bamboo the third installation section of thick bamboo of a toper section of thick bamboo one end and install the communication mechanism of third installation section of thick bamboo inner chamber, communication mechanism includes communication circuit board, communication circuit board includes processing module, communication module, signal amplifier, communication joint and storage module, processing module with camera electric connection, processing module with communication joint electric connection, communication module with signal amplifier electric connection, processing module with storage module electric connection.
Preferably, the light source module further includes a first internal thread groove formed in an end surface of the first mounting cylinder.
Preferably, the camera module further comprises a first external thread column arranged on the conical cylinder, far away from one end of the second mounting cylinder, and matched with the first internal thread groove, and a second internal thread groove arranged on the second mounting cylinder, far away from one end of the conical cylinder.
Preferably, the third installation cylinder comprises a cylinder body, a second external thread column which is coaxially arranged on the end face of the cylinder body and matched with the second internal thread groove, an installation hole which is formed in the cylinder body and is far away from one end of the second external thread column, a slide rail which is symmetrically arranged in the inner cavity of the installation hole and a threaded hole which is formed in the end face of the slide rail.
Preferably, the communication mechanism further comprises a fixing block arranged on the end face of the communication circuit board and contacted with the end face of the sliding rail, and a connecting hole arranged on the end face of the fixing block and penetrating through the other end face of the fixing block and corresponding to the threaded hole.
Preferably, the device further comprises a lower centralizer mounted on one end of the barrel body far away from the second external thread column.
Preferably, the camera module further comprises an upper centralizer mounted on one end of the first mounting cylinder far away from the camera module.
Preferably, the device further comprises a soluble pumping ring arranged on the lower centralizer at one end far away from the cylinder body.
Preferably, still include the salvage subassembly, the salvage subassembly includes and installs with the axle center last keeping away from of last centralizer the weight bar of first installation section of thick bamboo one end, install with the axle center last keeping away from of weight bar the universal joint and the axle center of last centralizer one end are installed keep away from on the universal joint the salvage head of weight bar one end.
Preferably, the device further comprises a bridge-shooting coupler, wherein the bridge-shooting coupler comprises a perforator coaxially mounted at one end, far away from the barrel, of the lower centralizer, a setting tool coaxially mounted at one end, far away from the lower centralizer, of the perforator, and a bridge plug coaxially mounted at one end, far away from the perforator, of the setting tool.
Compared with the prior art, the invention has the beneficial effects that: the oil casing inner diameter measuring device generates structured light grating through a light source module, grating stripes are projected to the inner wall of the oil casing, the stripes are modulated by the inner wall of the oil casing and then deformed, a plurality of lenses on a camera module perform a plurality of times of measurement from a plurality of visual angles, the grating stripe images collected by the camera module are transmitted to a computer through a communication module to be calculated and processed, through calculation and interpretation of structured light stripe information, corresponding collection time and cable length are combined, a point cloud registration technology is adopted, scanning point clouds obtained by 3 cameras are spliced into a complete environment point cloud, a 360-degree omnibearing oil casing inner wall 3D shape from a well head to a bridge plug setting position is reconstructed, measurement precision is improved, and continuous measurement is realized in the circumferential direction. Through non-contact measurement, no complicated and precise mechanical measuring arm structure exists, speed measurement is improved, and adverse effects caused by solid phase invasion, foreign matter suspension on the measuring arm, wear of the measuring arm and the like are avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a light source module according to the present invention;
FIG. 3 is a schematic view of a camera module according to the present invention;
FIG. 4 is a schematic view of a communication assembly according to the present invention;
FIG. 5 is a schematic view of a third mounting cylinder according to the present invention;
FIG. 6 is a schematic view of a communication mechanism according to the present invention;
FIG. 7 is a schematic block diagram of a communication circuit board of the present invention;
FIG. 8 is a schematic block diagram of the system of the present invention;
fig. 9 is a schematic view of the installation of the measuring mechanism and the bridge-launching combiner according to the present invention.
In the figure: 100 measuring mechanism, 110 light source module, 111 first mounting barrel, 112 structured light coding, 113 first internal thread groove, 120 camera module, 121 second mounting barrel, 122 conical barrel, 123 camera head, 124 first external thread column, 125 second internal thread groove, 130 communication component, 131 third mounting barrel, 131a barrel body, 131b second external thread column, 131c mounting hole, 131d sliding rail, 131e threaded hole, 132 communication mechanism, 132a communication circuit board, 132a1 processing module, 132a2 communication module, 132a3 signal amplifier, 132a4 communication joint, 132a5 storage module, 132b fixed block, 132c connecting hole, 200 lower centralizer, 300 upper centralizer, 400 soluble pumping ring, 500 fishing assembly, 510 weighted rod, 520 universal joint, 530 fishing head, 600 bridge shooting linkage, 610 perforator, 620 setting tool, 630 bridge plug.
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.
The invention provides an oil casing inner diameter measuring device, which generates a structured light grating through a light source module, wherein grating stripes project to the inner wall of an oil casing, the stripes are modulated by the inner wall of the oil casing and then deformed, a plurality of lenses on a camera module perform a plurality of times of measurement from a plurality of visual angles, the grating stripe images acquired by the camera module are transmitted to a computer through a communication module to perform calculation processing on the grating stripe images acquired by the camera module, scanning point clouds acquired by 3 cameras are spliced into a complete environmental point cloud through calculation and interpretation of structured light stripe information by combining corresponding acquisition time and cable length by adopting a point cloud registration technology, the 3D appearance of the inner wall of the oil casing from a well head to a bridge plug setting position in an all-dimensional manner at 360 degrees is reconstructed, the measurement precision is improved, and continuous measurement is realized in the circumferential direction. Through non-contact measurement, there is no complicated, precise mechanical measuring arm structure, so that the speed measurement is improved, and adverse effects caused by solid phase invasion, foreign matter suspension on the measuring arm, wear of the measuring arm and the like are avoided, please refer to fig. 1 and 9, including: a gauging mechanism 100, a lower centralizer 200, an upper centralizer 300, a soluble pumping ring 400, a fishing assembly 500, and a bridge shooting linkage 600;
referring to fig. 1 to 8, the measuring mechanism 100 includes a light source module 110, a camera module 120 coaxially installed on an end surface of the light source module 110, and a communication component 130 coaxially installed on the camera module 120 and far from an end of the light source module 110, the light source module 110 includes a first installation cylinder 111 and a structured light code 112 installed on a circumferential outer sidewall of the first installation cylinder 111, the structured light code 112 is transparent, the structured light code 112 includes a point structured light, a line structured light, a plane structured light, and the like, preferably a stripe plane structured light grating, a laser emitter is installed in an inner cavity of the first installation cylinder 111, the laser emitter corresponds to the structured light code 112, the camera module 120 includes a second installation cylinder 121 coaxially installed on the end surface of the first installation cylinder 111, a cone cylinder 122 coaxially installed on the second installation cylinder 121 and near an end of the first installation cylinder 111 and connected to the first installation cylinder 111, and a camera 123 annularly installed on a circumferential outer sidewall of the cone cylinder 122, the communication assembly 130 includes a third mounting cylinder 131 coaxially disposed on the second mounting cylinder 121 at an end far from the tapered cylinder 122, and a communication mechanism 132 mounted in an inner cavity of the third mounting cylinder 131, the communication mechanism 132 includes a communication circuit board 132a, the communication circuit board 132a includes a processing module 132a1, a communication module 132a2, a signal amplifier 132a3, a communication connector 132a4, and a storage module 132a5, the processing module 132a1 is electrically connected to the camera 123, the processing module 132a1 is electrically connected to the communication module 132a2 and the communication connector 132a4, the communication module 132a2 is electrically connected to the signal amplifier 132a3, the processing module 132a1 is electrically connected to the storage module 132a5, the communication assembly further includes a lower centralizer 200 mounted on the cylinder 131a at an end far from the second external threaded column 131b, and an upper centralizer 300 mounted on the first mounting cylinder 111 at an end far from the camera module 120, the conical barrel 122 can be a circular truncated cone or a prismatic table, the number of the cameras 123 is set according to needs, 3 lenses are taken as an example in the application, the working principle of the number of the other lenses is the same as that of the 3 lenses, and the 3 lenses are set at an angle of 120 degrees without repeated description. And (3) connecting the instruments in series on the ground, starting cable pumping by using clean water, starting the instrument for measurement, and recording pumping time and cable length in the measurement process. The apparatus is placed in the well with the lower centralizer 200 and the upper centralizer 300 holding the instrument substantially centered. The position, provided with the structured light code 112, of the first mounting cylinder 111 is subjected to transparent treatment, laser is emitted through the laser emitter, and when the laser penetrates through the first mounting cylinder 111, the laser irradiates the inner wall of the oil casing through the structured light code 112 arranged on the first mounting cylinder 111 to form structured light projection on the inner wall of the oil casing. The structured light code 112 includes a point structured light, a line structured light, a surface structured light, and the like, preferably, a stripe-surface structured light grating, when a grating stripe is projected to an inner wall of the oil casing, the stripe is modulated by the inner wall of the oil casing and then deformed, and then a camera 123 performs multiple shooting from multiple viewing angles, and transmits the shot data to the processing module 132a1, the processing module 132a1 performs preliminary processing on the data, and then transmits the data to the communication module 132a2 or the communication connector 132a4 or the storage module 132a5, and wirelessly transmits the data to the ground through the communication module 132a2, or transmits the data through the communication connector 132a4 by using a cable, or stores the data through the storage module 132a 5. In order to enhance the transmission of the wireless signal, the wireless signal is enhanced by the signal amplifier 132a3, and the communication distance of the wireless signal is increased. After the ground computer receives the shot data, extracting the central stripes of the structured light, calculating and interpreting the information of the structured light stripes, combining the corresponding acquisition time and the cable length, adopting a point cloud registration technology to splice the scanning point clouds obtained by 3 cameras into a complete environment point cloud, and reconstructing the 3D appearance of the inner wall of the 360-degree all-dimensional oil casing from the well mouth to the bridge plug setting position. The light source module generates the structured light grating, two methods of digital equipment and a mechanical device are adopted, the mechanical device is preferably selected, the mechanical device is simple in structure and low in cost, and the capability of bearing high-frequency and high-load impact of the perforation is stronger. Continuous measurement is realized in the circumferential direction of the shaft, and the measurement precision is effectively improved. Taking a 114.3mm inner diameter cannula as an example, the circumferential resolution is 0.37mm, estimated at 320 pixels per camera resolution in the circumferential direction. The speed measurement and longitudinal measurement precision are improved, the image is shot by a camera for 60 frames per second for estimation, 54 images can be obtained by the instrument per meter at the pumping (measurement) speed of 4000m/h, the estimation is carried out according to the minimum grating number, namely 2 gratings are arranged in each frame, the sampling rate is 108 gratings/m, and the longitudinal resolution is 9.3mm under the sampling rate. Through non-contact measurement, the precision is high, the speed is fast, has avoided solid phase invasion, foreign matter to hang the adverse effect that brings such as measuring arm and measuring arm wearing and tearing simultaneously. By adopting the structured light projection principle, the oil-gas well is in a dark and lightless environment underground, and better application conditions are provided for image acquisition, synchronous calculation processing or compression storage. The light source module adopts a reducing design to ensure that the camera can still acquire the projection of the grating stripes when the instrument is close to the shaft. By adopting a point cloud registration technology, the measurement result is not influenced by the eccentricity, pitching and other postures of the instrument, and the requirement on centering the instrument is low;
referring to fig. 1-6 again, the light source module 110 further includes a first internal thread groove 113 formed on an end surface of the first mounting cylinder 111, the camera module 120 further includes a first external thread column 124 disposed on the tapered cylinder 122 and far away from one end of the second mounting cylinder 121 and matched with the first internal thread groove 113, and a second internal thread groove 125 disposed on the second mounting cylinder 121 and far away from one end of the tapered cylinder 122, the third mounting cylinder 131 includes a cylinder body 131a, a second external thread column 131b coaxially disposed on an end surface of the cylinder body 131a and matched with the second internal thread groove 125, a mounting hole 131c disposed on an end of the cylinder body 131a far away from the second external thread column 131b, a slide rail 131d symmetrically disposed in an inner cavity of the mounting hole 131c, and a threaded hole 131e disposed on an end surface of the slide rail 131d, the communication mechanism 132 further includes a fixing block 132b disposed on an end surface of the communication circuit board 132a and contacting with an end surface of the sliding rail 131d, and a connection hole 132c disposed on an end surface of the fixing block 132b, penetrating through another end surface of the fixing block 132b, and corresponding to the threaded hole 131e, the second mounting cylinder 121 is mounted on an end surface of the light source module 111 through cooperation of the first external threaded post 124 and the first internal threaded groove 113, the cylinder body 131a is mounted on one end of the second mounting cylinder 121 far from the light source module 111 through cooperation of the second external threaded post 131b and the second internal threaded groove 125, the communication circuit board 132a is matched with the sliding rail 131d, the communication circuit board 132a is inserted into an inner side of the sliding rail 131d, one side of the connection hole 132c adjacent to the communication circuit board 132a contacts with one side of the sliding rail 131d close to the opening of the cylinder body 131a, and is screwed into the inner side of the sliding rail 131d through the connection hole 132c by a bolt, so as to fixedly mount the communication circuit board 132a in an inner cavity of the mounting hole 131 c;
further comprising a soluble pumping ring 400 mounted on lower centralizer 200 at an end distal from barrel 131 a;
the fishing assembly 500 comprises a weighted rod 510 coaxially mounted at one end of the upper centralizer 300 far away from the first mounting cylinder 111, a universal joint 520 coaxially mounted at one end of the weighted rod 510 far away from the upper centralizer 300, and a fishing head 530 coaxially mounted at one end of the universal joint 520 far away from the weighted rod 510;
the bridge-fire coupler 600 comprises a perforator 610 coaxially mounted at one end of the lower centralizer 200 far away from the cylinder 131a, a setting tool 620 coaxially mounted at one end of the perforator 610 far away from the lower centralizer 200, and a bridge plug 630 coaxially mounted at one end of the setting tool 620 far away from the perforator 610, and fig. 9 is a schematic diagram of tool string connection when the bridge-fire coupler is used in bridge-fire coupling construction.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the disclosed embodiments of this invention can be used in any combination with one another as long as no structural conflict exists, and the combination is not exhaustively described in this specification merely for the sake of brevity and resource savings. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides an oil casing internal diameter measuring device which characterized in that: the method comprises the following steps:
the measuring mechanism (100) comprises a light source module (110), a camera module (120) coaxially mounted on the end face of the light source module (110), and a communication assembly (130) coaxially arranged at one end, far away from the light source module (110), of the camera module (120);
the light source module (110) comprises a first mounting cylinder (111) and a structured light code (112) arranged on the outer circumferential side wall of the first mounting cylinder (111), a laser emitter is mounted in an inner cavity of the first mounting cylinder (111), and the laser emitter corresponds to the structured light code (112);
the camera module (120) comprises a second mounting cylinder (121) coaxially arranged on the end face of the first mounting cylinder (111), a conical cylinder (122) coaxially arranged on the second mounting cylinder (121) and close to one end of the first mounting cylinder (111) and connected with the first mounting cylinder (111), and a camera (123) annularly arranged on the outer circumferential side wall of the conical cylinder (122);
communication subassembly (130) are including setting up with the axle center keeping away from on second installation section of thick bamboo (121) the third installation section of thick bamboo (131) of toper section of thick bamboo (122) one end and installing communication mechanism (132) of third installation section of thick bamboo (131) inner chamber, communication mechanism (132) include communication circuit board (132 a), communication circuit board (132 a) are including processing module (132 a 1), communication module (132 a 2), signal amplifier (132 a 3), communication joint (132 a 4) and storage module (132 a 5), processing module (132 a 1) with camera (123) electric connection, processing module (132 a 1) with communication module (132 a 2) with communication joint (132 a 4) electric connection, communication module (132 a 2) with signal amplifier (132 a 3) electric connection, processing module (132 a 1) with storage module (132 a 5) electric connection.
2. The oil casing inner diameter measuring device according to claim 1, characterized in that: the light source module (110) further comprises a first internal thread groove (113) formed in the end face of the first mounting cylinder (111).
3. The oil casing inner diameter measuring device according to claim 2, characterized in that: the camera module (120) further comprises a first external thread column (124) which is arranged on the conical cylinder (122) and is far away from one end of the second mounting cylinder (121) and matched with the first internal thread groove (113), and a second internal thread groove (125) which is arranged on the second mounting cylinder (121) and is far away from one end of the conical cylinder (122).
4. The oil casing inner diameter measuring device according to claim 3, characterized in that: the third installation cylinder (131) comprises a cylinder body (131 a), a second external thread column (131 b) which is coaxially arranged on the end face of the cylinder body (131 a) and matched with the second internal thread groove (125), an installation hole (131 c) which is far away from one end of the second external thread column (131 b) on the cylinder body (131 a), a sliding rail (131 d) which is symmetrically arranged in the inner cavity of the installation hole (131 c) and a threaded hole (131 e) which is arranged on the end face of the sliding rail (131 d).
5. The oil casing inner diameter measuring device according to claim 4, characterized in that: the communication mechanism (132) further comprises a fixing block (132 b) arranged on the end face of the communication circuit board (132 a) and contacted with the end face of the sliding rail (131 d), and a connecting hole (132 c) arranged on the end face of the fixing block (132 b) and penetrating through the other end face of the fixing block (132 b) and corresponding to the threaded hole (131 e).
6. The oil casing inner diameter measuring device according to claim 5, characterized in that: the device also comprises a lower centralizer (200) which is arranged on one end of the cylinder body (131 a) far away from the second external thread column (131 b).
7. The oil casing inner diameter measuring device according to claim 6, characterized in that: the device also comprises an upper centralizer (300) which is arranged on one end of the first installation cylinder (111) far away from the camera module (120).
8. The oil casing inner diameter measuring device according to claim 7, characterized in that: further comprising a soluble pumping ring (400) mounted on the lower centralizer (200) at an end remote from the barrel (131 a).
9. The oil casing inner diameter measuring device according to claim 8, characterized in that: still include and salvage subassembly (500), it installs to salvage subassembly (500) including concentric center go up centralizer (300) go up to keep away from weight bar (510), the concentric center of first installation section of thick bamboo (111) one end are installed keep away from on weight bar (510) go up universal joint (520) and the concentric center of stabilizer (300) one end are installed keep away from on universal joint (520) salvage head (530) of weight bar (510) one end.
10. The oil casing inner diameter measuring device according to claim 9, characterized in that: still include bridge and penetrate antithetical couplet ware (600), bridge and penetrate antithetical couplet ware (600) include install with the axle center under keep away from on centralizer (200) perforator (610) of barrel (131 a) one end, install with the axle center perforator (610) are gone up and are kept away from setting tool (620) of centralizer (200) one end down and install with the axle center setting tool (620) are gone up and are kept away from bridging plug (630) of perforator (610) one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211307422.4A CN115507762A (en) | 2022-10-24 | 2022-10-24 | Oil casing internal diameter measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211307422.4A CN115507762A (en) | 2022-10-24 | 2022-10-24 | Oil casing internal diameter measuring device |
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| Publication Number | Publication Date |
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| CN115507762A true CN115507762A (en) | 2022-12-23 |
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| CN202211307422.4A Pending CN115507762A (en) | 2022-10-24 | 2022-10-24 | Oil casing internal diameter measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116047875A (en) * | 2023-04-03 | 2023-05-02 | 广东科视光学技术股份有限公司 | Exposure machine light source module spliced by single UVLED light sources |
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2022
- 2022-10-24 CN CN202211307422.4A patent/CN115507762A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116047875A (en) * | 2023-04-03 | 2023-05-02 | 广东科视光学技术股份有限公司 | Exposure machine light source module spliced by single UVLED light sources |
| CN116047875B (en) * | 2023-04-03 | 2023-06-23 | 广东科视光学技术股份有限公司 | Exposure machine light source module spliced by single UVLED light sources |
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