Double-transmission-mode transmission device suitable for near-bit instrument
A technology of dual transmission mode and transmission device, which is applied in earth-moving drilling, surveying, wellbore/well components, etc., can solve the problem of increasing the length of the short section near the drill bit, the sound wave transmission cannot meet the transmission distance over the screw, and the short transmission distance near the drill bit. The mechanical structure of the section is complex and other problems, so as to achieve the effect of convenient maintenance and replacement.
Active Publication Date: 2022-04-12
苏州中科地星创新技术研究所有限公司
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Problems solved by technology
Due to the design of the transducer, the mechanical structure of the launching sub near the bit is more complicated, and the length of the launching sub near the bit is increased at the same time
In addition, the sound wave transmission also cannot meet the requirements of the screw transmission distance (about 10 meters)
Method used
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[0031] Example: see Figure 1-8 As shown, a dual transmission mode transmission device suitable for near-bit instruments:
[0032] The dual transmission mode transmission device suitable for near-drill instruments includes a near-drill instrument body 1, the lower end of the near-drill instrument body 1 is used to connect with the drill bit, and the upper end thereof is used to connect with the screw rod.
[0033] An integrated circuit compartment 2, a tuning circuit compartment 3, a stratum parameter measurement compartment 4 and two battery compartments 18, 19 are provided on the outer periphery of the near-drill instrument body 1. The two battery compartments 18, 19, the integrated circuit compartment 2, and the formation parameter measurement compartment 4 are evenly distributed on the drill bit instrument body 1, and the tuning circuit compartment 3 is located between the integrated circuit compartment 2 and the formation parameter measurement compartment 4. During this ...
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A double-transmission-mode transmission device suitable for a near-bit instrument is characterized in that a comprehensive circuit bin (2) and a stratum parameter measuring bin (4) are arranged on the periphery of a near-bit instrument body (1); a power supply control unit, an isolation control unit, a first emission control circuit unit and a second emission control circuit unit are arranged in the integrated circuit cabin (2); the first emission control circuit unit is used for emitting a constant-power direct current signal; the second emission control circuit unit is used for emitting an alternating current signal; the near-bit instrument body (1) is sleeved with an insulation coil supporting ring (5), the periphery of the insulation coil supporting ring (5) is sleeved with a metal antenna cover (6), and a coil (8) and a magnetic block (9) are arranged between the periphery of the insulation coil supporting ring (5) and the metal antenna cover. The embodiment has an electrode type transmission working mode and an electromagnetic wave transmission working mode.
Description
technical field [0001] In particular, the present invention relates to a dual-transmission-mode transmission device suitable for near-bit instruments. The transmission device is used to transmit the measurement parameters of the near-drill bit measuring instrument (such as a sensor) to the well-ground transmission system, so as to complete the communication between the near-drill bit measuring instrument and the well-ground transmission system. Background technique [0002] my country's shale oil and gas reserves are abundant, but due to the tight reservoirs and extremely low permeability, it is necessary to use a large number of horizontal wells for development to improve economic benefits. In the process of horizontal drilling in undulating shale reservoirs underground, in order to ensure that the wellbore is always drilled along the target reservoir, downhole high-precision positioning means are essential. How to transmit near-bit measurement parameters to the ground has...
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IPC IPC(8): E21B47/13E21B47/013E21B47/017
Inventor 朱日祥张文秀郑健周永健
Owner 苏州中科地星创新技术研究所有限公司