Data transmission system and method for transmitting downhole measurement-while-drilling data to ground

摘要

Disclosed are a data transmission system and method for transmitting downhole measurement-while-drilling data to ground. The system comprises: a drill string (40) on which a logging-while-drilling tool is mounted; and a thrown-while-drilling sub (71), which accommodates a micro-memory (43). The thrown-while-drilling sub (71) comprises: a housing sleeved over the drill string (40), a gap space being formed between an outer side of the drill string (40) and the housing; a control circuit (901); and a wireless transceiver apparatus (63). When receiving an instruction, sent by the control circuit (901), for releasing the micro-memory (43), the thrown-while-drilling sub (71) releases the micro-memory (43) loaded with downhole measurement data to the ground. The data transmission system for transmitting downhole measurement-while-drilling data to ground significantly improves a data transmission rate and communication reliability, and does not require extra cost or affect a normal drilling process because only mud is used as a transmission medium of the micro-memory.