CN208456583U - One kind is with the nearly drill bit electromagnetic wave radio transmitting device of brill - Google Patents

Abstract

The utility model discloses one kind with the nearly drill bit electromagnetic wave radio transmitting device of brill, it include: reception device and emitter, the emitter is arranged close to the screw motor position at drill bit 0.3m, the reception device is mounted on screw tip, away from the position screw motor 10m, for acquiring formation parameter and emitting formation parameter data with electromagnetic wave wireless transmission method, reception device is used for the data of receiving and transmitting unit and uploads data in a pulsed fashion to ground emitter.This radio transmitting device includes emitter and reception device, emitter is close to drill bit, the accurate formation parameter close to drill bit can be obtained, and data are transmitted using means of electromagnetic waves, reception device long pass data in a manner of mud-pulse, compared to electric current induction type transmission method, in time, the scope of application is wide in range for data transmission.

Description

One kind is with the nearly drill bit electromagnetic wave radio transmitting device of brill

Technical field

It is specifically a kind of with the nearly drill bit electromagnetic wave wireless transmission dress of brill the utility model relates to wireless communication technique field It sets.

Background technique

Nearly drill bit instrument used in oil field at present, acquire data device majority can not close to drill bit, but from 3-5 meters of drill bit, such data have hysteresis quality；In addition, its transmission mode is induced electricity streaming mostly, emitting portion passes through control Circuit excitation current coil generates micro-current, and receiving portion equally uses coil to generate induced current, to realize the biography of data It is defeated.Induced electricity streaming manner narrow application range, it is higher to the performance requirement of stratum and mud, it is required that mud must be led Dielectric, the shale gas block of current country's Devoting Major Efforts To Developing, 99% uses oil-base mud (megohmite insulant), therefore induced current is transmitted The mode of formula cannot 100% use.

In addition, existing wireless communications technical know-how comparative maturity, but most of its conclusion be under the conditions of normal conventional or It obtains under ideal conditions.For (underground) under specific condition communication theory and conclusion almost without can use for reference, it is main former Because being:

1. used under the high temperature and high pressure environment of underground, maximum temperature up to 150 DEG C or more, pressure up to 140MPa with On, therefore the stable structure of device and temperature performance requirement are very high；

2. transmission channel is wellbore rather than free space, medium is also not air, but conductivity is lower that (underground is often Saliferous) water base or oil-base mud, medium composition is more complicated, the influence of the propagation characteristic of electric wave is not yet grasped at present, and Subsurface environment simulation is also unable to complete on ground；

3. sending device (containing measuring probe) should be as close to drill bit (0.3 in order to obtain the geologic data near drill bit Within), such sending device certainly will will act as high speed rotation (per minute up to 250 turns) with drill bit one, in drilling process acutely Vibration, with the collision of the borehole wall and abrasion many adverse effects will be brought to communication reliability；

4. once going into the well needs continuous work more than ten days, once breaking down, drilling well rework cost is very high, therefore wants for midway Ask the reliability of the device sufficiently high；

It 5. underground does not have AC power source, can only be powered with battery, also not be available large capacity electricity because being limited by wellbore space Pond, therefore to guarantee that the device can be more than ten days in underground continuous work, it is very high to the power conservation requirement of the device.

Utility model content

The purpose of this utility model is to provide one kind with nearly drill bit electromagnetic wave radio transmitting device is bored, to solve above-mentioned back The problem of being proposed in scape technology.

To achieve the above object, the utility model provides the following technical solutions:

One kind is with the nearly drill bit electromagnetic wave radio transmitting device of brill, comprising: reception device and emitter, the emitter It is arranged close to the screw motor position at drill bit 0.3m, the reception device is mounted on screw tip, away from screw motor 10m Position, emitter is for acquiring formation parameter and emitting formation parameter data, reception device with electromagnetic wave wireless transmission method For receiving and transmitting unit data and upload data to ground in a pulsed fashion.

The emitter includes power circuit, single-chip microcontroller, PSK modulator, transmitting antenna and geologic sensor, the electricity Source circuit is separately connected geologic sensor, PSK modulator and single-chip microcontroller, and the microcontroller serial port and geologic sensor output end connect It connects, single-chip microcontroller is also connected with PSK modulator, and single-chip microcontroller is used to be encoded and be generated PSK modulation waveform, PSK to transmission data Modulator connects transmitting antenna.

The reception device includes: power circuit, analog signal conditioning circuit, ADC converter and single-chip microcontroller and reception day Line, the microcontroller serial port are connect with ADC converter output terminal, and single-chip microcontroller includes digital filter and software decoder, ADC Converter input terminal connects analog signal conditioning circuit, and receiving antenna is connect with analog signal conditioning circuit.

As a further solution of the present invention: PSK modulator carrier is set as 1kHz.

As a further solution of the present invention: digital filter uses FIR filter.

As a further solution of the present invention: using non-magnetic rustproof outer steel shell outside the emitter.

Compared with prior art, the utility model has the beneficial effects that this radio transmitting device includes emitter and connects Receiving apparatus, emitter can obtain the accurate formation parameter close to drill bit close to drill bit, and utilize means of electromagnetic waves Data are transmitted, reception device long pass data in a manner of mud-pulse compare electric current induction type transmission method, and data transmission is timely, The scope of application is wide in range.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is the structural principle block diagram of emitter in the utility model.

Fig. 3 is the emission power rectification circuit figure of emitter in the utility model.

Fig. 4 is the transmitting FM circuit figure of emitter in the utility model.

Fig. 5 is the structure principle chart of reception device in the utility model.

Fig. 6 is the AD FM circuit of reception device in the utility model.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Referring to Fig. 1, in the utility model embodiment, it is a kind of with the nearly drill bit electromagnetic wave radio transmitting device of brill, comprising: to connect Receiving apparatus 1 and emitter 3, the emitter 3 are arranged close to 4 0.3m of drill bit using HIGH STRENGTH NON-MAGNETIC STAINLESS STEEL shell The screw motor position at place, for acquiring the formation parameter at drill bit 4, shell makes nearly drill bit device adapt to underground height The complex environments such as temperature, high pressure, high speed rotation and sharp impacts；The reception device 1 is mounted on 2 top of screw rod, away from screw motor The position 10m, emitter 3 transmit data to reception device 1 by electromagnetic wave wireless transmission method, and reception device 1 passes through mud The mode of slurry pulse upload the data to ground, is studied and judged by ground instrument to data, realizes the guiding to downhole drill bit Control.

Such as Fig. 2-4, the emitter 3 includes power circuit, single-chip microcontroller, PSK modulator, transmitting antenna and geology sensing Device, the power circuit are separately connected geologic sensor, PSK modulator and single-chip microcontroller, for powering for each unit, the monolithic Machine serial ports is connect with geologic sensor output end, and single-chip microcontroller is also connected with PSK modulator, and PSK modulator carrier is set as 1kHz is because it has signal bandwidth narrow using PSK modulation, and band efficiency is relatively high, and in identical signal-to-noise ratio item The advantages such as the part bit error rate is low, and carrier frequency 1kHz is suitble to the environment in downhole transmitted, and advantageously reduces transmission power and (be conducive to Energy conservation), PSK modulator connects transmitting antenna, and single-chip microcontroller is used to be encoded and be generated PSK modulation waveform to transmission data, Geologic sensor measurement obtain be located at drill bit near geological information data, as orientation gamma, direction of deflection, drill speed, Layer temperature etc., is input to single-chip microcontroller through serial ports and is encoded, single-chip microcontroller controls PSK waveform simultaneously, then through PSK modulators modulate (power enhancing) is sent by transmitting antenna afterwards.

Such as Fig. 5,6, the reception device 1 includes: power circuit, analog signal conditioning circuit, ADC converter and single-chip microcontroller And receiving antenna, the microcontroller serial port are connect with ADC converter output terminal, single-chip microcontroller includes digital filter and software decoding Device, digital filter are FIR filter, are used for digital filtering, filter factor can be according to signal quality dynamic mapping, to ensure Best filter effect, software decoder for decoding, can according to signal background noise level adjust automatically threshold value, so that it is guaranteed that It is decoded into power, reduces the bit error rate；ADC converter input terminal connects analog signal conditioning circuit, receiving antenna and analog signal Conditioning circuit connects, and after the signal for receiving emitter 1, is first handled (amplification, filtering through analog signal conditioning circuit Deng), it completes to decode by single-chip microcontroller after converting using ADC, finally obtains the geological information data of sending device transmission.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (6)

1. a kind of with the nearly drill bit electromagnetic wave radio transmitting device of brill, comprising: reception device and emitter, it is characterised in that: institute The screw motor position that emitter is arranged close at drill bit 0.3m is stated, the reception device is mounted on screw tip, away from spiral shell The position bar motor 10m, emitter are used to acquire formation parameter and emit formation parameter data with electromagnetic wave wireless transmission method, Reception device is used for the data of receiving and transmitting unit and uploads data in a pulsed fashion to ground.

2. according to claim 1 a kind of with the nearly drill bit electromagnetic wave radio transmitting device of brill, it is characterised in that: the transmitting Device includes power circuit, single-chip microcontroller, PSK modulator, transmitting antenna and geologic sensor, and the power circuit is separately connected ground Matter sensor, PSK modulator and single-chip microcontroller, the microcontroller serial port are connect with geologic sensor output end, and single-chip microcontroller is also connected with PSK modulator, single-chip microcontroller are used to that transmission data to be encoded and be generated PSK modulation waveform, the connection transmitting of PSK modulator Antenna.

3. according to claim 1 a kind of with the nearly drill bit electromagnetic wave radio transmitting device of brill, it is characterised in that: the reception Device includes: power circuit, analog signal conditioning circuit, ADC converter and single-chip microcontroller and receiving antenna, the microcontroller serial port It is connect with ADC converter output terminal, single-chip microcontroller includes digital filter and software decoder, and ADC converter input terminal connects mould Quasi- signal conditioning circuit, receiving antenna are connect with analog signal conditioning circuit.

4. according to claim 2 a kind of with the nearly drill bit electromagnetic wave radio transmitting device of brill, it is characterised in that: PSK modulation Device carrier frequency is set as 1kHz.

5. according to claim 1 or 2 a kind of with the nearly drill bit electromagnetic wave radio transmitting device of brill, it is characterised in that: described Non-magnetic rustproof outer steel shell is used outside emitter.

6. according to claim 3 a kind of with the nearly drill bit electromagnetic wave radio transmitting device of brill, it is characterised in that: digital filtering Device uses FIR filter.