Short section for measuring while drilling

Abstract

The invention relates to the technical field of geological exploration drilling equipment, in particular to a short section for measuring while drilling. The short section comprises an integral shell,an electric circuit butt joint pipe, an exploring pipe assembly, electric resistivity testing assemblies, a power source assembly, a first control circuit element and a second control circuit element. The integral shell is provided with a hollow inner cavity. A plurality of linear grooves are formed in the outer lateral wall of two ends of the integral shell in the circumferential direction. Theelectric resistivity testing assemblies are arranged in the linear grooves. A plurality of grooves are formed in the outer lateral wall of the middle of the integral shell in the circumferential direction. The exploring pipe assembly, power source assembly and first control circuit element are respectively arranged in the grooves. The electric circuit butt joint pipe is detachably connected into the hollow inner cavity of the integral shell. N line board grooves are uniformly formed in the outer wall of the electric circuit butt joint pipe in the circumferential direction. The second control circuit element comprises n circuit boards. The circuit boards are matched with the line board grooves. Parameters of a stratum of a drill bit can be measured almost in real time. The size is small, the structure is compact, mounting and disassembling are convenient, and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of geological exploration drilling equipment, in particular to a measuring-while-drilling sub-joint. Background technique [0002] In the field of address exploration, especially in the process of oil and gas exploration, measurement-while-drilling technology is often used, that is, measurement-while-drilling equipment is installed behind the drill bit to measure the geological parameters of the formation around the drill bit in real time, so as to identify complex oil and gas layers with industrial exploitation value , so that the drill bit stops in the required reservoir in time; at the same time, the position of the drill bit, drilling trajectory, well deviation, well diameter and vibration parameters are monitored to realize real-time positioning and timely deviation correction. [0003] The sub-joint device in traditional measurement-while-drilling equipment is usually more than nine meters away from th...

AI Technical Summary

Problems solved by technology

However, the production cost of the MWD pup joint is extremely high, especially the groove structure of the inner wall is very difficult to process

In addition, the installation and disassembly of the equipment is complicated, the on-site operation is difficult, and the maintenance time and cost are high

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