Adjustable shear valve mud pulser and controls therefor
a technology which is applied in the field of mudpulsing valve and control system, can solve the problems of system disadvantage of taking flow away from the bit, slow data transmission rate, and inability to distinguish between adjacent pulses, etc., and achieve the effect of improving data transmission ra
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[0012]FIG. 1 illustrates a drill collar 10 which is above the drill bit (not shown). Inside the drill collar 10 is a plate 12. Plate 12 has a series of openings 14. The shaped of the openings 14 in plate 12 are more clearly shown in FIG. 2 in plan view.
[0013]Supported within the drill collar 10 are downhole instrument 16 which are used for measurement of a variety of conditions downhole of the formation as well as the circulating mud. A processor 18 is mounted adjacent the instruments 16. One of the many functions of the processor 18 is to control the motor 20. Motor 20 is connected directly to plate 22, which is also shown in FIG. 2. Plate 22 has a series of openings 24 which, in the preferred embodiment, match the openings 14 of plate 12. The openings 14 and 24 are preferably crescent-shaped, but other configurations can be used without departing from the spirit of the invention. Motor 20 can orient plate 22 in different positions with respect to the fixed plate 12. FIG. 2 shows, ...
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