Rotary valve pulser capable of sliding underground

Abstract

The invention discloses a rotary valve pulser capable of sliding underground. The rotary valve pulser capable of sliding underground mainly comprises a rotary valve pulser instrument string (1), a suspension drill collar (2), a non-magnetic drill collar (3) and a drill collar tool (4), wherein the suspension drill collar (2) is connected with the non-magnetic drill collar (3); one end of the rotary valve pulser instrument string (1) is arranged in the suspension drill collar (2) and the non-magnetic drill collar (3); and the other end of the rotary valve pulser instrument string (1) is rigidlyconnected with the drill collar tool. The rotary valve pulser capable of sliding underground is simple in structure, firm and durable, and firm in connection; a power line and a communication line can simultaneously penetrate through the rotary valve pulser, so that the use of a battery is reduced, the length of the rotary valve pulser is shortened, the hidden danger of water leakage of wet jointconnection is avoided, and the hidden danger of water leakage damage of a telescopic rod is also avoided; and moreover, the production cost is reduced, and the problem that secondary positioning is needed during mounting of the rotary valve pulser is solved.

Description

technical field [0001] The invention relates to the fields of petroleum exploration and drilling, in particular to a downhole slidable rotary valve pulser. Background technique [0002] The mud pulse generator is an important component of the logging while drilling and measurement system. The rotary valve pulser is a commonly used pulse generator system; with the increase of downhole measurement requirements, the rotary valve pulser needs to be equipped with more and more instruments More, in addition to the traditional MWD system, drill collar downhole tools such as the resistivity system while drilling, the near-bit system, and the rotary steerable system also need to be connected with the instrument. [0003] Since the rotary valve pulsator system needs to be positioned and installed in the suspension joint, when the drill collar downhole tool is connected to the rotary valve pulsator system, there is a problem of secondary positioning in the axial direction, which affect...

AI Technical Summary

Problems solved by technology

[0007] The existing problems are: the structure of the telescopic rod is complex and easy to be damaged, and it is prone to problems such as water leakage; the cost of the wet joint is high, and it is prone to poor communication after repeated plugging and unplugging, and the installation of the wet joint structure requires blind operation, and it is impossible to judge whether the seal is installed or not. Damage and other problems, there are hidden dangers

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