RU88385U1 - DEVICE FOR TRANSFER OF INFORMATION ON TECHNOLOGICAL PARAMETERS FROM A WELL - Google Patents

Abstract

A device for transmitting information about technological parameters from a well, including a self-contained device installed in a well under an electric centrifugal pump, containing recording and recording equipment, power batteries and an information archive with a receiver and transmitter for electromagnetic communication connected to it and a transmitter and receiver device installed on the wellhead characterized in that it contains repeaters installed in a well above a stand-alone device having self-contained power supply.

Description

The utility model relates to the field of oil, gas or water production and can be used in geophysical surveys to transmit to the surface data on the parameters of technological processes carried out in the well.

A device is known for transmitting information about technological parameters from a well, including an autonomous device for geophysical surveys in a well, containing recording and recording equipment, an archive of information and a battery (see V.N. Vasilevsky, A.I. Petrov. Technique and technology for determining parameters of wells and reservoirs. M: Nedra, 1989). A stand-alone device is installed in the well before the descent of the electric centrifugal pump (ESP) for the entire period of geophysical research and records information about technological processes in a long-term memory. Reading information from long-term memory is carried out after removing the stand-alone device to the surface.

A disadvantage of the known device is that information about the course of technological processes becomes available only after the end of the investigated processes and the extraction of an autonomous device from the well.

It is known that a device for transmitting information from a well, selected as the closest analogue, including an autonomous device installed in a well under an ESP containing recording and recording equipment, power batteries and an information archive with a receiver and transmitter for electromagnetic communication connected to it and installed at the wellhead receiving and transmitting device (see patent RU No. 24702, IPC ⁷ ЕВВ 47/00). A stand-alone device in a known device is lowered into the well before the launch of the ESP to the depth of the studied interval of the reservoir and remains in the well during the entire period of the technological process. The device allows you to receive and transmit information at any time during the execution of technological processes and actively manage the investigated processes.

However, when transmitting an information-carrying signal through a cableless electromagnetic channel, a lot of factors influence the signal quality:

- the remoteness of the stand-alone device installed at a considerable depth in the well from the transmitter-receiver installed on the surface of the well;

- a significant distance of the screened surface of the well, during the passage of which the signal noticeably attenuates and is distorted.

As a result, a signal is received on the receiving-transmitting device on the surface, which does not contain complete and reliable information from autonomous devices.

The objective of the utility model is to create a device in which the loss of a signal that carries information about technological parameters from the well to the surface is minimized.

The technical result achieved by using the proposed technical solution is to increase the reliability of information received on the surface in on-line mode from downhole autonomous devices.

The specified technical result is achieved in that a device for transmitting information about technological parameters from a well, including an autonomous device installed in a well under an ESP, comprising recording and recording equipment, power batteries and an information archive with a receiver and transmitter for electromagnetic communication connected to it, and installed at the wellhead, the transmitter-receiver, as proposed, contains repeaters installed in the well above the stand-alone device, having autonomous food.

Placing in the borehole repeaters above the installed autonomous geophysical instrument allows electromagnetic communication along the borehole by sequentially transmitting upward a signal from one repeater to another. This eliminates signal attenuation and clogging of the channel with interference from the ESP. As a result of this, complete and reliable information about the research parameters from the stand-alone device is transmitted to the receiving and transmitting device to the well surface.

The fact that the repeaters are self-powered provides a permanent electromagnetic channel between the receiver and the transmitter of the information archive installed in the well of the stand-alone device and the receiving and transmitting device installed on the surface of the well. Thus, there is the possibility of uninterrupted signal transmission in real time.

The proposed utility model is presented in the diagram.

A device for transmitting information about technological parameters from a well contains an autonomous device 1 for geophysical exploration, which is lowered into the well and installed in the interval of the studied reservoir. Repeaters 2 are placed above the stand-alone device 1 along the borehole for relay transmission of information about downhole technological processes in the form of an electromagnetic signal 3. The distance from the stand-alone device 1 to the nearest relay 2 and the distance between subsequent repeaters 2 is calculated from the conditions of the depth of the research interval and the transmission attenuation to the signal surface. An ESP 4 is placed in the well 4. At the wellhead there is a transmitting and receiving device 5. End consumers 6 are connected to the receiving and transmitting device 4.

The device operates as follows.

Before the start of the production process, a stand-alone device 1 is lowered into the well and installed in the interval of the reservoir to record information about technological processes. Installation of stand-alone devices 1 can be carried out using anchors and automatic coupler devices. In the case of exploitation of a multilayer reservoir, autonomous devices 1 are lowered in the number of productive layers and devices 1 are installed in the interval of each layer.

Then, repeaters 2 are subsequently lowered into the well and placed through calculated distances using, for example, anchors, above a stand-alone device 1.

ESP 4 is lowered and the production process begins.

The transmitter-receiver device 5 sends a signal from the well surface to turn on the device 1. The information on production processes is recorded in the archive of the device 1. The transmission of signal 3 with information from the archive of the device 1 from the transmitter of the device 1 is carried out in constant time mode. The signal 3 is received by the relay 2 closest to the device 1, which amplifies the signal and transmits it to the next relay 2, which are installed higher along the wellbore. On the surface, signal 3 is received by a transmitting and receiving device 5, which processes the signal and transmits it to end consumers 6 in order to make a decision on the management of production processes.

Claims (1)

A device for transmitting information about technological parameters from a well, including a self-contained device installed in a well under an electric centrifugal pump, containing recording and recording equipment, power batteries and an information archive with a receiver and transmitter for electromagnetic communication connected to it and a transmitter and receiver device installed on the wellhead characterized in that it contains repeaters installed in a well above a stand-alone device having self-contained power supply.