The invention discloses a novel cable-free type data
bidirectional transmission device for a water
injection well, capable of realizing a function of
bidirectional transmission of data, including a flow and a pressure, from a well mouth of the water
injection well to an underground injection layer and from the underground injection layer to the well mouth and adopting
time sequence waves for coding. The device comprises an
upper joint, an outer protective
pipe, a
pressure control short section, a water
nozzle short section, a circuit control short section, a middle joint and a lower joint; theupper joint and the lower joint are connected with the outer protective
pipe through threads; the outer protective
pipe is internally provided with the
pressure control short section, the water
nozzle short section and the circuit control short section; the circuit control short section is internally provided with a flow sensor, a
pressure sensor, a battery
assembly and a
logic control operationcircuit; and injected water enters the stratum after passing through a rapid opening / closing valve and the water
nozzle short section.
Time sequence pressure
waves are decided by
signal coding, a decimal
system is adopted, timing is started when a
signal is changed to a low level, and the
signal represents a number N if becoming into a high level after N time units. For the novel cable-free type data
bidirectional transmission device for the water
injection well, on one aspect, data non-contact bidirectional transmission is realized; and on the other hand, coding is performed by adopting a form of the
time sequence waves, and by combining with a design mode of the rapid opening / closing valve, the coding, decoding and transmitting efficiencies of the pressure waves can be greatly improved.