Surface signal transceiver device, downhole signal transceiver device and data transmission system

Abstract

The invention discloses a ground signal receiving and sending device, an underground signal receiving and sending device and a data transmission system, wherein the ground signal receiving and sending device is arranged at the ground end of a drill well, and comprises a ground antenna module, a receiving and sending switching module, a first signal receiving circuit, a first signal sending circuit and a first data processing module; the ground antenna module is used for converting received electromagnetic signals from the underground position into electromagnetic signals, converting the electromagnetic signals carrying ground information into electromagnetic signals and sending the electromagnetic signals to the underground position; the receiving and sending switching module is connected with the ground antenna module; the first signal receiving circuit and the first signal sending module are respectively connected with the receiving and sending switching module; the first data processing module is connected with the first signal receiving circuit and the first signal sending circuit; the receiving and sending switching module isolates the first signal receiving circuit and the first signal sending circuit. The system has the advantages that the data two-way transmission between ground equipment and underground equipment can be realized; the pump starting or stopping is not needed; the drilling time is not delayed; the misoperation cannot be easily generated.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a surface signal transceiver device, an underground signal transceiver device and a data transmission system. Background technique [0002] Measurement while drilling is a key technical means in the construction of directional wells and horizontal wells. At present, the commonly used information transmission methods while drilling mainly include drilling fluid pressure pulse coding MWD (or conventional MWD) and electromagnetic signal modulation (EM-MWD), and generally only one-way information transmission is carried out. The measurement data modulation is transmitted from downhole to the surface on the drilling fluid pressure pulse wave or electromagnetic signal, and this process is also called uplink transmission. In order to change the working state of downhole instruments or actuators during drilling, the existing MWD or EM-MWD is usually equip...

AI Technical Summary

Problems solved by technology

[0010] The working principle of this downlink transmission link is the same as that of starting and stopping the pump and changing the combination of pump speed sequences, except that the carrier of the transmitted information becomes the drill string speed at different speeds, and it can only transmit a limited number of commands. , cannot perform complex instructions or continuous information transmission

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