RU138333U1 - DEVICE FOR MEASURING BOTTOM-BASED PARAMETERS DURING JOINT AND SEPARATE OPERATION OF MULTI-PLASTIC OBJECTS WITH A WIRELESS COMMUNICATION CHANNEL - Google Patents

Abstract

1. A device for measuring downhole parameters during the joint and separate operation of multilayer objects with a wireless communication channel, placed at the reception of an operational sucker rod pump (pump) in a sub-packer space and containing a wireless signal transmission module including a sealed enclosure containing a functional electronic circuit, an autonomous power supply unit, a wireless signal transmission transmitter and a measurement module containing downhole sensors, o characterized in that a pulse generator of electromagnetic oscillations with a power amplifier of the transmitted signal, the symmetrical terminals of which are connected to the electrodes, is introduced into the transmitting wireless device for transmitting the signal, the specified case made of metal being used as the first electrode, and the second electrode is a remote electrode, having stable electrical contact with the casing of the well and remote from the first electrode by means of an insulating insert, the length of which is selected in depending on the electrically conductive properties of the reservoirs intersected by the well. 2. The device according to claim 1, characterized in that a stable electrical contact is carried out using electrically conductive centralizers mounted on a remote electrode.

Description

The utility model relates to the field of monitoring the development regime of oil and gas multilayer wells operated using downhole equipment, namely, to means for transmitting current values of bottomhole parameters.

Known means of monitoring the development mode of production oil and gas multilayer wells equipped with deep pumps, including multichannel geophysical probes that transmit information (current values of bottomhole pressure, flow rate, formation fluid moisture and temperature) in real time through a wireline or on a solid carrier during descent to wire. (V.M. Osadchiy. Prospect state of geophysical (GIS) and hydrodynamic (GDI) studies of mechanized wells equipped with rod (SHG), electric centrifugal (ESP) pumps in Russia. // NTV Karotazhnik. Tver. 2004, Issue 10-11) p. 88-90).

A disadvantage of the known designs is the difficulty of delivering them to the interval of study along the annulus, which is associated with a high accident rate of this operation, as well as the impossibility of delivery to the sub-packer space during the joint-separate operation of the reservoirs with two-section rod pumps.

A device for researching wells equipped with deep pumping equipment is known, which, in order to provide real-time data transmission to the surface about the operating mode of the lower reservoir, separated from the upper annular packer, contains wireless signal transmission means (RF application No. 2005136035, stated November 21, 2005, published June 10, 2007).

A known device designed to control the development of a production well equipped with production mechanized equipment designed for the joint and separate operation of two or more productive formations, and including a sealed housing (module) with a functional diagram and a measuring probe equipped with pressure, flow sensors, moisture content, electrical conductivity and temperature, contains a sealed device housing with a built-in functional circuit, which is placed at the reception e of the pump located in the under-packer space, and the measuring probe is equipped with a piezoelectric transmitting transducer and suspended from the sealed housing of the device using a flexible electrically conductive insert (extension cord), which ensures its necessary location above the roof of the lower reservoir. At the same time, ground-based (wellhead) equipment, in turn, is equipped with a receiving piezoelectric transducer connected to a recording device coupled to a personal computer.

In addition, the measuring probe is additionally equipped with centralizers, ensuring its reliable conductive contact with the casing.

The disadvantages of this device are:

- insufficient stability of the wireless piezoelectric communication channel due to changes in the piezoelectric properties of the formation fluid filling the well;

- a significant effect on the level of the transmitted signal of the content of gas dissolved in the well fluid;

- restriction of the depth of placement in the well of an autonomous measuring module, due, including the above reasons.

The objective of the utility model is to increase the reliability and power of the transmitted signal over a wireless communication channel, as well as to expand the scope due to the possibility of use in deeper wells

The problem is achieved in that in a device for measuring downhole parameters during the joint and separate operation of multilayer objects located at the reception of an operational sucker rod pump (pump) in a sub-packer space and containing a wireless signal transmission module including a sealed enclosure containing a functional electronic circuit , an autonomous power supply unit, a wireless signal transmission transmitter, and a measuring module comprising downhole sensors of parameters, a pulse generator of electromagnetic waves with a power amplifier of the transmitted signal, the symmetrical terminals of which are connected to the electrodes, is introduced into the transmitting wireless device for transmitting the signal, while the specified case made of metal is used as the first electrode, and the second electrode is a remote electrode with the casing of the well is a stable electrical contact, and remote from the first electrode using an insulating insert, the length of which is selected depending STI from the conductive properties of the productive formations intersected by the well.

Stable electrical contact is carried out using electrically conductive centralizers mounted on a remote electrode.

The attached figure shows the location of the device in the well.

The device comprises: a sealed metal housing 1 (housing), which is mounted on the intake of the filter of the pump 2 using a standard threaded connection. The housing contains a functional electronic circuit, an autonomous power supply unit (not shown in FIG.), A wireless signal transmission transmitter and a measuring module 3 containing downhole sensors: pressure, flow rate, temperature, resistivity meter, and moisture content of formation fluid 4 coming from the formation 5 to receive the pump 2. The wireless transmission device of the signal transmission is an electromagnetic communication channel containing a first electrode, which is a metal housing 1 and a second a nose electrode 6 having stable electrical contact with the well casing 7 by means of an electrically conductive centralizer 8 and remote from the first electrode 1 by means of an insulating insert 9, while symmetrical pulse outputs 10 and 11 are connected to both electrodes 1 and 6, forming an electric dipole generator 12 electromagnetic waves with a power amplifier.

The device is lowered into the well in the layout of production equipment, including tubing 13 (tubing), pump 2 with filter 14 and separation packer 15. The ground signal receiving device consists of a receiving element in the form of a closed antenna frame 16 and a recording unit 17 connected to it with a computer 18 installed on the well site 19.

The device operates as follows.

The layout of operational equipment, including tubing 13, a pump 2 with a filter 14, a separation packer 15, and a housing 1 mounted on a filter 14, containing a functional electronic circuit, an autonomous power supply, a measuring module 3, containing downhole sensors and a wireless signal transmission transmitter including a pulse generator 12 of electromagnetic waves, and the remote electrode 6 is lowered into the well 19 in the interval of fluid selection. After putting pump 2 into operation, the measuring sensors of module 3 begin to record downhole parameters at the intake of filter 14 of pump 2, the analog values of which are digitized and transmitted through a signal power amplifier using a pulse generator 12 electromagnetic oscillations, symmetrical leads 10 and 11 which are connected to the electrodes 1 and 6, forming an electric dipole of the electromagnetic communication channel into the surrounding space. Electromagnetic pulses emitted by an electric dipole penetrate behind the casing 7 into the rock, and propagating, reach the receiving antenna frame 16 located on the surface. Further, in the recording unit 17, electromagnetic pulses are amplified, decrypted and reproduced after processing on the display of computer 18 in the form of numerical values of pressure, flow rate, temperature, moisture content and electrical conductivity, characterizing the formation fluid at the reception of the filter of the pump 2.

The first electrode 1 and the second electrode 6 are spaced apart using an insulating insert 9. Moreover, the separation value, depending on the length of this insert, determines the main working frequency of the electromagnetic communication channel: the greater the distance, the lower the carrier frequency and vice versa. The magnitude of the frequency in the case of the proposed device plays a significant role, since the electric dipole works in the well with a casing 7 having high shielding properties.

Under these conditions, the possibility of arbitrary spacing of the electrodes, carried out by simply changing the length of the insert, plays a decisive role in optimizing the operating mode of the proposed device, namely: if the well intersects low-resistance rocks, the length of the insert must be significantly increased, but for high-resistance rocks, vice versa cut back. It was established experimentally that in the first case, it is possible to limit the insertion length to 5-6 meters, and in the second - 3-4 meters. In principle, the longer the insert, the less the influence of the casing string and rock resistance on the value of the information signal, but in this case, increased power of the autonomous power supplied to the dipole is required.

Claims (2)

1. A device for measuring downhole parameters during the joint and separate operation of multilayer objects with a wireless communication channel, placed at the reception of an operational sucker rod pump (pump) in a sub-packer space and containing a wireless signal transmission module including a sealed enclosure containing a functional electronic circuit, an autonomous power supply unit, a wireless signal transmission transmitter and a measurement module containing downhole sensors, o characterized in that a pulse generator of electromagnetic oscillations with a power amplifier of the transmitted signal, the symmetrical terminals of which are connected to the electrodes, is introduced into the transmitting wireless device for transmitting the signal, the specified case made of metal being used as the first electrode, and the second electrode is a remote electrode, having stable electrical contact with the casing of the well and remote from the first electrode by means of an insulating insert, the length of which is selected in depending on the electrically conductive properties of the productive formations crossed by the well. 2. The device according to claim 1, characterized in that a stable electrical contact is carried out using electrically conductive centralizers mounted on a remote electrode.

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