RU74004U1 - CABLE FOR INSTALLATION OF SUBMERSIBLE ELECTRIC PUMPS - Google Patents

Abstract

The utility model relates to the cable industry, namely, to cable designs designed to supply electrical energy to electric motors of oil production, water lifting and pumping liquids to a rated alternating voltage of 2.5 and 3.3 kV of a frequency of 50 Hz. These cables can be used to power and monitor the operation of submersible electrical installations in wells with complicated geological conditions, as well as in parallel to monitor existing and newly developed fields. The main factors of economic efficiency are:

- accurate analysis of the work of submersible equipment in real time;

- quick response to a violation of the standard mode of operation;

- reduction of cases of failure of submersible equipment.

Description

The utility model relates to the cable industry of the electrical industry, namely, cables designed to transfer electrical energy to electric motors of submersible oil production units.

An analogue of the development is a cable for transmitting electrical energy to electric motors of submersible pumps, containing three conductive conductors laid parallel to one plane or twisted together, coated with plastic or rubber insulation, and enclosed in a corrosion-resistant tape armor.

One of the main indicators characterizing the efficiency of a submersible installation at a well is the overhaul period. The experience of operating oil wells showed that in order to optimize cable operation in various geological conditions, it is necessary to constantly monitor the operation parameters of the installation, which is especially relevant for hot wells in Western Siberia, Orenburg Region, Stavropol Territory, where it is necessary to constantly monitor so that the limits of the maximum permissible working temperatures were not exceeded over the entire length of the cable line and at the installation as a whole. It is proposed to use an optical fiber module laid along the main cores of a power cable designed to power submersible electric pumps as a temperature control sensor. Fiber optic systems can function as distributed measuring sensors. Physical quantities, such as temperature or pressure, act on fiberglass and change the properties of optical fibers. A pulse propagating along an optical fiber core interacts with the material of the light guide core, by changing the returned (or reflected) signal, you can get information about the temperature along the optical fiber module and therefore about the temperature of the power cable into which it is included.

Such sensors, having low weight, small size and high sensitivity, can control parameters at a distance of several kilometers, while they are insensitive to electromagnetic interference and completely explosion and fireproof.

The placement of the fiber-optic module in the cable design for powering the motors of submersible electric pumps will allow:

1. To increase the efficiency in making decisions on the operation of the installation, reduce the number of cases of overheating and ultimately increase the overhaul period of the well as a whole.

2. Digitally transmit information from sensors placed in the well, such as pressure, fluid level.

Figure 1 and figure 2 shows a cross section of the claimed design of a flat and round cable.

The cable contains three insulated copper conductors (1) designed to transfer electrical energy to the submersible pump motor, in the space between parallel or twisted conductors, an optical module is laid, consisting of optical fibers (4) enclosed in a plastic sheath (5), applied by extrusion . On top of the insulated cores and optical module assembled into the cable, a common cushion of non-woven full tapes or rubberized unvulcanized fabric tapes is applied (2). Ribbon armor is applied on top of the pillow (3)

Bibliography:

1. GOST R 51777-2001 "Cables for the installation of submersible electric pumps."

2. Magazine "Sensors and systems" No. 7, 2004

3.Http: //www.lios-technology.com/Menu/About+LIOS/LIOS+Technology+

Claims (1)

An electric cable for submersible electric pump installations, containing conductive conductors laid parallel in one plane or twisted together, coated with plastic or rubber insulation and enclosed in corrosion-resistant tape armor, characterized in that one or more optical modules are laid in the spaces between the conductors, each of which is a bunch of fiber optic fibers placed inside the polymer sheath.