VISUALISED LOGGING AND DEVICE TO THIS END (VERSIONS) Russian patent published in 2014 - IPC E21B47/02 G01N21/27 

FIELD: mining.

SUBSTANCE: proposed method comprises tripping the video camera in hole with turbid medium on logging cable over tubing. Logging zone is isolated by packer and web in tubing suspension wherein suspended rock is settled by gravity. Visualised logging is executed in column of laminated optically clear fluid by displacement of video camera inside tubing suspension. Logging results are used to estimate operating conditions of the hole. If required, extra web is used to confine the logging zone. In compliance with first version, logging device comprises tubing suspension with packer separating the logging zone from hole behind-the-packer chamber, logging cable, video camera suspended from logging cable inside the suspension. Web is hooked to video camera to fit in suspension seat and to be detached at camera tripping in hole along suspension to logging zone. Web and seat in suspension are furnished with locking elements. Web has a central hole with gland for logging cable to slide there over and can have filter cells. Said web features OD smaller than tubing ID. Video camera is equipped with centring skid. Logging cable is coated with polyamide shell over logging length. In compliance with second version, logging device comprises tubing suspension with packer separating the logging zone from hole behind-the-packer chamber, logging cable, video camera suspended from logging cable inside the suspension. Web is secured to video camera to slide by its edges over suspension wall. Video camera is equipped with centring skid. Gland seals are arranged over web edges. Said web can be made of filter material. Said web features OD smaller than tubing ID.

EFFECT: lower costs, accelerated analysis.

15 cl, 2 dwg