Core detection device of coring instrument

Abstract

The invention discloses a core detection device of a coring instrument. The core detection device comprises a base body and a rock core switch mechanism arranged on the base body, wherein the base body is provided with a rock core channel communicated with a rock core barrel, and the rock core switch mechanism comprises a detection part, a connecting rod assembly and a travel switch which are sequentially arranged and connected in the length direction of the coring instrument; the detection part is rotationally installed on the base body, one end of the detection part extends into the rock core channel to enable a rock core passing through the rock core channel to push the detection part to rotate; and the connecting rod assembly can be pulled by the rotating detection part to trigger thetravel switch to act. The core detection device relates to the field of oil exploration and development. According to the rock core detection device of the coring instrument provided by the invention,the rock core switch mechanism adopts a sliding block connecting rod structure, the kinematic pair mainly comprises a sliding pair and a rotating pair, the structure is simpler and more reliable, theadaptability to the underground high-temperature mud environment is higher, and the radial size and the occupied space can be reduced due to the fact that the core detection device is arranged in thelength direction of the coring instrument.

Description

technical field [0001] The invention relates to the field of petroleum exploration and development, and more particularly relates to a core detection device of a coring instrument. Background technique [0002] During the wireline coring process, it is very important to accurately detect whether the core is successfully taken downhole in real time and measure the quality of the core to improve the efficiency and quality of the core. In addition, it is also very critical for geological analysis to accurately determine the horizon of the required core. At present, the number of cores taken at a time can be as high as 80, and it is difficult to return them, especially in fragile fractured formations. To this end, it is equipped with a core detection device, which can monitor in real time whether the coring is successful, and can measure the length of the core to judge whether the quality meets the standard. If the purpose of coring is not achieved, the depth can be repositione...

AI Technical Summary

Problems solved by technology

Among them, the rock core detection device includes a rock core switch installed at the entrance of the core barrel, but the existing rock core switch has a complicated structure and is easy to get stuck in the actual field application process, making it impossible to accurately detect the rock core, and it occupies a large area in the radial direction of the instrument. big space

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