Fish measurement cable logging instrument based on magnetic-signal and ultrasonic-wave principles

Abstract

The invention relates to a fish measurement cable logging instrument based on magnetic-signal and ultrasonic-wave principles. The instrument comprises a shell, an acoustic-wave hole diameter probe disposed on the bottom end inside the shell, a measurement electrode disposed inside the shell as well as a circuit board disposed inside the shell, wherein as configured, the acoustic-wave hole diameterprobe can detect hole diameter information of a fish position by acoustic waves and can acquire a well-around imaging map of the fish position; as configured, the measurement electrode can detect depth information of the top of underground fish by magnetic signals; the circuit board is respectively connected to and controls the acoustic-wave hole diameter probe and the measurement electrode; anda rotation device is disposed in the shell and connected to the acoustic-wave hole diameter probe and drives the acoustic-wave hole diameter probe to rotate. The instrument provided by the invention has the beneficial effects that the fish position can be measured; the shape of the fish can be measured; and accurate data is provided for fish salvage operations.

Description

technical field [0001] The invention relates to a cable logging instrument for measuring fish falling based on the principle of magnetic signals and ultrasonic waves, and belongs to the field of oil drilling detection tools. Background technique [0002] In the process of exploration and drilling, it often happens that drilling tools and downhole tools in various conditions fall into the well due to fracture and various sundries at the wellhead accidentally fall into the well, forming different types, different sizes, and different materials of falling fish. At this time, the drilling operation must be terminated. Salvage the fallen fish. It is necessary to detect the shape and position information of the fish head before fishing the fish under complex well conditions. The current measurement tools can only give the depth information of the fish, but cannot determine the orientation of the fish in the well and the detailed information of the surrounding wellbore. (such as t...

AI Technical Summary

Problems solved by technology

It is necessary to detect the shape and position information of the fish head before fishing the fish under complex well conditions. The current measurement tools can only give the depth information of the fish, but cannot determine the orientation of the fish in the well and the detailed information of the surrounding wellbore. (such as the well diameter of the big belly hole, the relative inclination direction of the fish, etc.), without this data, it belongs to blind fishing, which will result in low fishing efficiency and long construction period

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