CN-121473803-B - Optical fiber multi-parameter logging device

CN121473803BCN 121473803 BCN121473803 BCN 121473803BCN-121473803-B

Abstract

The application discloses an optical fiber multi-parameter logging device, which relates to the technical field of ocean engineering equipment, and comprises a cable winch, a logging cable, a guide wheel and a logging unit for underground optical scanning and parameter measurement, wherein the cable winch is used for winding and releasing the logging cable, one end of the logging cable is connected with the cable winch, the other end of the logging cable is guided by the guide wheel and is connected to the logging unit, the logging unit is provided with an air bag I which is sealed and coated on the outer side of a pipeline endoscope and an air bag II which is used for fixing a detection position, and isolation drilling fluid is realized through inflation so as to accurately detect and fix the detection position and maintain pressure balance, so that the technical effects of improving the fixing stability, improving the environmental adaptability, reducing the signal interference and flexibly maintaining the pressure balance in a well can be realized.

Inventors

TIAN WANGUO
SU FUWEI
Chang Qiangbing
HU BIN
SUN GUANGYUE
WEN FANGYI
ZHANG HAIYAN
BA WENLIANG

Assignees

山东创格石油科技有限公司

Dates

Publication Date: 20260508
Application Date: 20251229

Claims (7)

1. An optical fiber multi-parameter logging device is characterized by comprising a cable winch (100), a logging cable (101), a guide wheel (110) and a logging unit (200) for underground optical scanning and parameter measurement; the cable winch (100) is used for winding and releasing a logging cable (101), one end of the logging cable (101) is connected with the cable winch (100), and the other end of the logging cable is guided by the guide wheel (110) and connected to the logging unit (200); The logging unit (200) is provided with a first air bag (220) which is hermetically coated on the outer side of the pipeline endoscope (212) and a second air bag (260) which is used for fixing a detection position, and isolation drilling fluid is realized through inflation so as to accurately detect and fix the detection position and maintain pressure balance; the logging unit (200) comprises a movable cylinder (210), a glass cover (211), a pipeline endoscope (212), an air bag I (220), an electric telescopic rod I (230), a fixed column (240), an electric telescopic rod II (250) and an air bag II (260); The movable cylinder (210) is of a cylindrical structure, a glass cover (211) is fixed inside the movable cylinder, the glass cover (211) is made of transparent materials and is used for protecting a pipeline endoscope (212), the pipeline endoscope (212) is rotationally connected in the glass cover (211) through a driving motor and is used for rotationally scanning a well wall, the first air bag (220) is wrapped on the outer side of the glass cover (211) and is attached to the well wall through inflation to form an isolation space, the movable cylinder (210) is slidingly connected above a fixed column (240) through a first electric telescopic rod (230), the second electric telescopic rod (250) is slidingly connected below the fixed column (240), the fixed column (240) is of a cylindrical structure, a first connecting ring (241) is fixed at the lower end of the fixed column, the second connecting ring (251) is fixed at the lower end of the second electric telescopic rod (250), and the upper end and the lower end of the second air bag (260) are fixedly and hermetically connected with the first connecting ring (241) and the second connecting ring (251) respectively and are wrapped on the outer sides of the fixed column (240) and the second electric telescopic rod (250) and are used for realizing the fixation of the inflation position through detection; A miniature air pump (120) is arranged in the fixing column (240), and the miniature air pump (120) is communicated with an air bag I (220) and an air bag II (260) through miniature pipelines and is used for providing gas for a logging unit (200) so as to realize detection position fixing; the first air bag (220) is of an annular structure in an inflated state, is made of a high-transparency film and is used for isolating drilling fluid, and the surface of the first air bag is coated with a fluororubber coating and is used for flexibly attaching to a well wall after inflation to form a clean observation window so as to reduce light signal scattering.
2. The optical fiber multi-parameter logging device according to claim 1, wherein the second airbag (260) comprises two airbag structures, namely a secondary airbag (261) and a primary airbag (262), and the overall structure of the second airbag (260) is sequentially formed from top to bottom into a three-layer structure of the secondary airbag (261) -the primary airbag (262) -the secondary airbag (261).
3. The optical fiber multi-parameter logging device according to claim 2, wherein the inner space of the main air bag (262) is uniformly divided into a plurality of cavities along the circumferential direction, the inner side wall of each cavity is filled with an iron powder mixture (263), a fixing ring (271) is fixed on the outer side of the fixing column (240) through a connecting frame (270), the fixing ring (271) is sleeved on the outer side of the electric telescopic rod II (250), a plurality of electromagnets (272) are circumferentially fixed on the side wall of the electric telescopic rod II, the electromagnets (272) are in one-to-one correspondence with the positions of the cavities, and the iron powder mixture (263) is attracted through magnetic attraction, so that the overall shape of the main air bag (262) is adjusted to adapt to the side wall of a borehole with a narrow or large abnormal degree.
4. A multi-parameter optical fiber logging device according to claim 3, wherein each cavity outer wall of the main air bag (262) is embedded with a pressure sensor (280), and the pressure sensors (280) are distributed on the corresponding cavity outer wall through a lattice for detecting the pressure information of each cavity in an expanded state.
5. A multi-parameter optical fiber logging device according to claim 3, wherein a tension sensor is fixed at the telescopic end of the second electric telescopic rod (250), the tension sensor is an optical fiber tension sensor and is used for sensing the axial tension transmitted by the main air bag (262), and the pressure compensation and the fine adjustment of the fixing force are realized by controlling the vertical moving distance of the second electric telescopic rod (250) and further extruding the main air bag (262).
6. The optical fiber multi-parameter logging device according to claim 4, wherein the valves of the pressure sensor (280) and the tension sensor, the electromagnet (272), the micro air pump (120) and each micro pipe are controlled by an external control system, and the pressure data is fed back by the pressure sensor (280) and the tension sensor, so that the overall expansion state of the air bag two (260) and the magnetic force of the electromagnet (272) are actively regulated to maintain the pressure balance in the well.
7. The optical fiber multi-parameter logging device as defined in claim 6, wherein the cavity of the main air bag (262) is filled with quantitative gas in an initial state, in the whole process of fixing the position, quantitative gas is filled into the internal space between the air bag II (260) and the fixed column (240) and the electric telescopic rod II (250) in advance, so that the air bag II (260) is inflated in advance in the whole, in the gradual inflation process, the on-off and magnetic force of electromagnets (272) at different positions are controlled according to the detection data of the pressure sensors (280) at each point, the integral form of the air bag II (260) is changed to adapt to the form of a well wall, then the two auxiliary air bags (261) are inflated, the integral inflation state of the air bag II (260) is stable, then the vertical movement distance of the electric telescopic rod II (250) is further controlled, and the main air bag (262) is extruded, so that extrusion force compensation of the well wall is realized to improve the stability after fixing.

Description

Optical fiber multi-parameter logging device Technical Field The invention relates to the technical field of ocean engineering equipment, in particular to an optical fiber multi-parameter logging device. Background The seabed well drilling is an engineering technology for directly exploring and developing oil and gas resources on the seabed, and is mainly used for resource exploitation in the fields of deep sea (water depth is generally more than 300 meters) and ultra-deep sea (water depth is more than 1500 meters), and the core aim is to drill a shaft in a seabed stratum through a complex underwater operation system to acquire the oil and gas resources. The seabed drilling system mainly depends on three types of platforms, namely a floating drilling ship, a semi-submersible drilling platform and a floating production platform, wherein the platforms are mainly connected with a seabed blowout preventer through a vertical pipe to form a closed circulation system so as to ensure drilling fluid circulation and well control safety, and in the field of deep sea petroleum drilling, a well logging technology is a key link for ensuring well safety and production efficiency. In the existing well logging process, the mechanical fixing mechanism is mainly relied on, for example, a nickel alloy sheet is expanded to be clung to a well wall to realize position fixing, although the detection efficiency is improved to a certain extent, the mechanical fixing component is considered to be easy to elastically rebound under the action of high pressure in a deep sea high-pressure environment, so that the fixing force is attenuated, the position is required to be manually adjusted repeatedly, the operation complexity and the time cost are increased, the well wall is often irregular (such as narrow or large in abnormal degree), the self-adaptive profile change is not easy to generate detection dead zones, the data integrity is influenced, a large amount of drilling fluid (oil-containing mud or synthetic-based mud) directly contacts with an optical element after the well is drilled on the seabed, the optical signal is scattered or absorbed, the image signal to noise ratio is reduced, the creep or stress concentration of the fixing component is possibly caused, and the pressure balance in the well is difficult to maintain due to the fact that the drilling fluid is caused. Disclosure of Invention The optical fiber multi-parameter logging device solves the technical problems that in the prior art, the stability is low, the environmental adaptability is poor, the signal interference is serious, and the pressure balance in a well cannot be flexibly maintained, and achieves the technical effects of improving the stability, improving the environmental adaptability, reducing the signal interference and flexibly maintaining the pressure balance in the well. The application provides an optical fiber multi-parameter logging device, which comprises a cable winch, a logging cable, a guide wheel and a logging unit for underground optical scanning and parameter measurement; The cable winch is used for winding and releasing a logging cable, one end of the logging cable is connected with the cable winch, the other end of the logging cable is guided by the guide wheel and connected to the logging unit, the logging unit is provided with a first air bag which is sealed and coated on the outer side of the pipeline endoscope and a second air bag which is used for fixing a detection position, and isolation drilling fluid is realized through inflation so as to accurately detect and fix the detection position and maintain pressure balance. Further, the logging unit comprises a movable barrel, a glass cover, a pipeline endoscope, an air bag I, an electric telescopic rod I, a fixed column, an electric telescopic rod II and an air bag II; The movable cylinder is of a cylindrical structure, a glass cover is fixed inside the movable cylinder and is made of transparent materials and used for protecting a pipeline endoscope, the pipeline endoscope is rotationally connected in the glass cover through a driving motor and used for rotationally scanning a well wall, the first air bag is wrapped on the outer side of the glass cover and is attached to the well wall through inflation to form an isolation space, the movable cylinder is connected above a fixed column in a sliding mode through a first electric telescopic rod, the second electric telescopic rod is connected below the fixed column in a sliding mode, the fixed column is of a cylindrical structure, a first connecting ring is fixed at the lower end of the fixed column, a second connecting ring is fixed at the lower end of the second electric telescopic rod, the upper end and the lower end of the second air bag are respectively fixed with the first connecting ring and the second connecting ring in a sealing mode and are wrapped on the outer sides of the fixed column and the second electric telescopic rod, and th