RU78861U1 - DEVICE FOR TRANSFER OF INFORMATION FROM A WELL - Google Patents

Abstract

A device for transmitting information from a well, comprising sensors arranged uniformly over the body, connected via information recording elements to the information archive and to power sources installed in the lower part of the body, an electromagnetic transmitter connected to the information archive and installed in the upper part of the body, and electromagnetic a receiver installed at the wellhead, characterized in that the elements for recording information are configured to alternately record sensor readings in an information archive, the cathromagnetic transmitter is included in the self-oscillating circuit, the electromagnetic receiver is connected to the information archive at the wellhead and included in the electromagnetic self-oscillating circuit with a natural vibration frequency lower than the natural vibration frequency of the self-oscillating circuit of the electromagnetic transmitter, and an electromagnetic wave emitter included in the self-oscillating circuit with the frequency of natural oscillations, a higher frequency of natural oscillations of the self-oscillating circuit of the electron transmitter transmitter.

Description

The utility model relates to the oil and gas industry and is intended for use in geophysical monitoring of wells.

Known devices for transmitting information from wells during their geophysical monitoring, including self-contained instruments installed in the well with sensors and long-term memory and a geophysical cable (M.N. Khusnulin "Geophysical methods for monitoring the development of oil reservoirs." M .: Nedra, 1989).

The use of a geophysical cable for transmitting information has the following disadvantages:

- the transmission of information from a well through a geophysical cable is possible only at short intervals when there are no drilling or produced equipment in the well;

- for the use of geophysical cable in the process of performing well operations, with installed drilling or production equipment, special devices are required;

- the presence of electromagnetic interference from running engines, the pump and the power cable supplying the pump.

These other disadvantages are deprived of another well-known device for transmitting information from a well, adopted as a prototype, including sensors located on the surface of the housing, connected via elements for recording information to long-term memory and to power sources installed in the lower part of the housing, an electromagnetic transmitter connected to long-term memory and installed in the upper part of the body, and an electromagnetic receiver mounted on the wellhead (RF patent No. 24702, IPC ЕВВ 47/00).

The disadvantages of the prototype are as follows:

- recording and transmitting information requires a lot of energy, so the power sources are quickly discharged, the recording of instrument readings in the long-term memory stops, and the device ceases to perform its functions in the well;

- for charging power sources, it is necessary to remove the devices to the surface and completely disassemble them.

The objective of the invention is to provide a device for transmitting information from a well devoid of the above disadvantages.

The technical result achieved by using the proposed invention is to reduce the energy consumption of power sources for transmitting information from

boreholes to the surface, recharging a power source in borehole conditions without lifting devices to the surface, improving the quality of information transmitted to the surface.

The specified technical result is achieved by the fact that in the device for transmitting information from the well, containing sensors arranged evenly over the body, connected via information recording elements to the information archive and to power sources installed in the lower part of the body, an electromagnetic transmitter connected to the information archive and installed in the upper part of the body, and the electromagnetic receiver mounted on the wellhead, according to the proposed, the elements for recording information are made with the possibility of The front-end recording of sensor readings in the information archive, the information transmitter with the information archive are included in the electromagnetic self-oscillating circuit, the receiver installed at the wellhead is connected to the information archive at the wellhead and included in the electromagnetic self-oscillating circuit with the natural frequency less than the natural frequency of the self-oscillating circuit transmitter in the well, in addition, at the wellhead there is an electromagnetic wave emitter included in the self-oscillating circuit with pilots at the natural oscillations greater than the natural frequency transmitter auto-oscillating circuit in the well.

The implementation of the elements for recording information with the ability to alternately record sensor readings in an information archive allows you to accumulate information and then transmit all the information from the transmitter to the receiver in one cycle, which improves the quality of the transmission. The discreteness of the transmission of information does not impair its quality, since the parameters of technological processes do not change quickly, and the recording of each individual process in full allows us to trace its dynamics and characteristics.

The inclusion of an information transmitter and an information archive in an electromagnetic self-oscillating circuit, which, as a standard, contains a capacitance and an inductor for receiving and transmitting electromagnetic oscillations, allows amplifying signals from sensors. The latter is achieved by using an inductance coil to excite large-amplitude self-oscillations from an electromagnetic wave directed to the inductance from sources of electromagnetic waves, which allows using the appeared energy in the inductance to transfer information to the surface without the energy consumption of power sources for these purposes, and also allows using the appeared self-oscillation energy to charge power sources, which are used batteries.

Connecting the information receiver on the surface to a separate information archive provides the accumulation of downhole information at the wellhead with the ability, as necessary, to decrypt it with repeated scans.

The inclusion of a surface receiver in a self-oscillating circuit allows the receiver to receive electromagnetic oscillations of the self-oscillating circuit of the transmitter and amplifies them resonantly. The fact that the frequency of natural oscillations of the self-oscillating circuit of the receiver is less than the frequency of natural oscillations of the transmitter circuit, allows you to excite a permanent parametric resonance. As is known, a self-oscillating circuit, changing its electrical parameters in the process of electromagnetic oscillations, self-adjusts and enters into a parametric resonance in each oscillation. Without this condition, it would be difficult to ensure resonance due to constant interference.

An electromagnetic wave emitter mounted on the surface and included in its self-oscillating circuit provides energy to the well to excite and power the transmitter and recharge the power sources. The fact that the emitter’s natural oscillation frequency is made higher than the natural oscillation frequency of the transmitter’s self-oscillating circuit in the well enhances the energy from the radiator in the transmitter’s self-oscillating circuit. The location of the radiator on the surface allows it to be carried out with any required power, and, in turn, the supply of high power and gain in self-oscillating circuits allows you to transmit an electromagnetic signal from a transmitter in the well to a receiver on the surface with sufficient m generality and high signal quality. The quality of the information transmitted to the surface is improved due to the fact that the energy coming from the emitter to the transmitter exceeds the energy of the power sources.

The proposed device is shown in the drawing.

The device comprises sensors 2 arranged evenly over the surface of the housing 1. Sensors 2 are connected to elements 3 intended for recording information in the information archive 4, and to power sources 5, which are installed under the elements 3 and information archive 4 in the lower part of the housing 1. To the archive 4 information is connected placed above the transmitter 6 information. Information archive 4 and information transmitter 6 are included in the electromagnetic self-oscillating circuit 7.

On the surface of the well, a receiver 8 is installed, included in the electromagnetic self-oscillating circuit 9 and configured to fix the damped electromagnetic oscillations of the self-oscillating circuit 7 of the transmitter 6 in the well. To record these fluctuations, there is an archive of 10 information.

At the wellhead there is also an electromagnetic wave emitter 11 included in the self-oscillating circuit 12. The emitter 11 is configured to expose the self-oscillating circuit 7 in the inductance coil in the well to excite the transmitter 6 and to charge power sources 5.

Self-oscillating circuits 7, 9 and 12 are standard and contain capacitances and inductors for exciting self-oscillations.

The device operates as follows.

At the first stage of monitoring, the device is lowered into the well and fixed, for example, at anchors, in the study interval.

A receiver 8 with a self-oscillating circuit 9 and an information archive 10 are installed on the surface.

The emitter 11 with the self-oscillating circuit 12 is also installed.

The device is turned on by the emitter 11. The electromagnetic waves amplified in the self-oscillating circuit 12 initiate the excitation of the self-oscillating circuit 7 in the well and charging the power sources 5. Sensors 2 are turned on and take readings on the parameters of the technological processes. Through elements 3, information from the sensors 2 is alternately transmitted to the information archive 4 for storage.

Simultaneously with the excitation of the self-oscillating circuit 7 from exposure to the self-oscillating circuit 12 of the emitter 11, the power sources 5 are recharged, the task of which is to write information from the sensors 2 to the information archive 4.

After turning off the emitter 11, the energy of the damped oscillations of the self-oscillating circuit 7 of the transmitter 6 is perceived by the self-oscillating circuit 9 of the receiver 8, ensuring the recording of information in the archive 10.

The presence in the device of self-oscillating circuits 7, 9 and 12 and the choice of the frequencies of their own oscillations in the above ratios allows, on the one hand, to turn on the emitter 11 as necessary, which significantly reduces energy consumption, and, on the other hand, transmit information from the archive 4 information in the well into the archive 10 information at the wellhead in full with a signal of sufficient power and high quality.

Claims (1)

A device for transmitting information from a well, comprising sensors arranged uniformly over the body, connected via information recording elements to the information archive and to power sources installed in the lower part of the body, an electromagnetic transmitter connected to the information archive and installed in the upper part of the body, and electromagnetic a receiver installed at the wellhead, characterized in that the elements for recording information are configured to alternately record sensor readings in an information archive, the cathromagnetic transmitter is included in the self-oscillating circuit, the electromagnetic receiver is connected to the information archive at the wellhead and included in the electromagnetic self-oscillating circuit with a natural vibration frequency lower than the natural vibration frequency of the self-oscillating circuit of the electromagnetic transmitter, and an electromagnetic wave emitter included in the self-oscillating circuit with the frequency of natural oscillations, a higher frequency of natural oscillations of the self-oscillating circuit of the electron transmitter transmitter.