RU32193U1 - Electric separator for downhole telesystems - Google Patents

Abstract

An electrical separator for downhole telesystems containing a composite, consisting of at least two parts, a metal casing with a channel for fluid passage, nipple ends of the casing with connecting threads on them, electrical insulation material, respectively, on the casing, on the channel surface and between the casing parts in their joint (mating), characterized in that the nipple ends of both parts of the housing are made with the shanks coaxial to the last, in each of which a bore is made from the end to accommodate the terminals of the electrical connector assembly and in the deep part of the channel bore to accommodate electrical conductors, the electrical conductors for the continuation of the channels made in the details of the housing as a longitudinal groove for forming a channel for the passage of fluid.

Description

03100309

lillilililliplpiilPWi.M.C. E21B47 / 00

ELECTRIC SEPARATOR FOR Borehole Television Systems

The utility model relates to the main nodes of downhole telesystems included in the assembly of drill strings for monitoring and controlling the drilling of deviated wells, complex wells and horizontal wells and is designed to provide two-way communication between the telesystem and ground equipment via a wireless electromagnetic channel through the borehole rocks.

Known electrical splitter 1, which is an insulator insert for the formation of a deep dipole antenna with the aim of connecting to it a transmitting generator of a downhole telesystem for wireless transmission of electromagnetic signals to the surface of the channel through the drill pipe string - rock channel. It should be noted that downhole telesystems typically include a deep power source (turbogenerator), a non-magnetic insert in the drill string, a block of downhole equipment (with a set of sensors) in the appropriate housing, an electrical splitter of the drill string to form the transceiver antenna - telesystem dipoles, nodes and switching blocks of electrical circuits between parts of the telesystem in the form, for example, of the cable section that is part of the telesystem and drill string as functionally and constructively tively independent object.

One of the significant drawbacks of the known electrical separator can be attributed to the fact that this design in the overall layout of the downhole telesystem requires the presence of special nodes and switching elements in the latter, since it performs the sole function of an antenna dipole.

ZIS-4 (development of VNIIGIS, Bashkortostan, Oktyabrsky, 1983). The electrical separator is a composite structure containing a metal case and connecting threads at its ends (for screwing it with other elements of the tele-system), a dielectric coating of the threaded joint (connection) of its parts (in the middle part of the case), as well as a section with a dielectric coating of its outer surface and the dielectric inner coating in the form of a dielectric tube insert flush with the inner surface of the channel.

However, this design also has the same drawback as the previous one.

The closest technical solution, otherwise the prototype, adopted an electric separator 3 of the drill pipe string, including the upper and lower parts of the body, connected by a conical threaded section with dielectric material in the thread and cylindrical layers of electrical insulation material on the outer and inner surfaces of the housing.

As shown by the rather long practice of geophysical services for operating a well-known object, which is also used as a housing for placing a borehole (deep) telemetry system and as a radiating dipole antenna, it is quite functional, but the switching circuits of nodes and elements of the telesystem, i.e. electrical conductors (cables) are placed in it in the channel for flushing fluid pumped through the drill string and are subject to a number of adverse factors, for example, waterjet exposure to highly chemically active flushing fluid at high pressures, temperatures and flow rates. In addition, the presence of wires in the channel is an additional hydraulic resistance.

switching node of the television system, as well as higher parameters, such as durability, reliability, maintainability, without complicating the technology and increasing manufacturing costs.

The goal (otherwise, the required technical result) is achieved by the fact that in the well-known electrical separator for downhole telesystems containing a composite, consisting of at least two parts, a metal housing with a channel for fluid passage, nipple ends of the housing with connecting threads on them, electrical insulation material on the body, on the channel surface and between the body parts in their joint (mating), the nipple ends of both body parts are made with the shanks coaxial to the last, in each of which oryh an end bore is made to accommodate a terminal electrical connector assembly and the channel depth in the shank portion of the bore to accommodate electrical conductors, the electrical conductors for the continuation of the channels made in the details of the housing as a longitudinal groove for forming a channel for the passage of fluid.

The required technical result in the aggregate of essential features of the object is ensured by the presence of the above distinguishing features in it, and failure to find equivalent technical solutions with the same properties in the public sources of patent and technical information implies that the claimed object meets the criteria of novelty and inventive step with obvious industrial applicability.

The drawing shows the design of the inventive electric separator for downhole telesystems (with a cut along the axis 0-0).

The electrical separator for downhole telesystems (see drawing) consists of a composite body of at least two parts 1 and 2, a housing with a channel 3 (for fluid passage) and connecting threads 4 and 5 at the ends of the housing, respectively. Electrical insulation material 6 is applied to the housing, and electrical insulation material 7 is placed in channel 3, while

THIS, in the mate (s) of parts 1 and 2 of the body, an insulating material is placed 8. The ends of parts 1 and 2 of the body, with connecting threads 3 and 4 at the nipple ends, respectively, have shanks 9 and 10 coaxial to the body. The latter have transverse dimensions much smaller, than the diameters of the channels of the attached drill pipes and provide an unobstructed flow of flushing fluid along the coaxial gap. Bores 11 are made at the end of each of the shanks (only one of them is indicated in the figure, on part 1). Bores 11 are designed to accommodate terminal nodes 12. In the deep part of the bores 11 channels 13 are made for accommodating electrical conductors isolated by common or individual insulation. The channels 13 are displayed on the inner surface of the channel 3 of the housing in both parts and in the assembly are one common longitudinal groove 14 along the generatrix of the channel 3 under the insulating material 7. The number of electrical conductors (shown in the figure conditionally and are not indicated by a separate position) is determined based on the design needs of the electrical connections nodes and blocks of the telesystem, located above and below the electric separator in the drill string (depicted by conventionally thin lines).

The inventive electric splitter with the additional function of the switching unit for downhole telesystems operates as follows.

When connecting electrically disconnected parts 1 and 2 of the housing, respectively, to the outputs of the emitting generator or to the inputs of the deep receiver (not shown in the figure), the electric splitter works like a conventional dipole antenna, while the nodes and blocks of the tele-system located (as part of the drill string) above and under the electric separator they connect (commute) to each other by means of electrical connectors of the terminal nodes 12 in the shanks of the housing. Inside the housing, both terminal blocks are electrically interconnected

electrical conductors that are located in the channels 13 and the longitudinal groove 14.

The electrical separators made in this way, which have undergone preliminary tests, have shown that the required technical result is fully ensured, the claimed object meets the criteria of a utility model and, therefore, is subject to protection by the relevant RF protection document for industrial property.

SOURCES OF RSCHORMATION TAKEN INTO ACCOUNT WHEN DRAWING OUT THIS APPLICATION:

1.SSSR, A.S. No. 941552, M. Cl. ЕВВ 44 / 00.1980

2. Assembly drawing, code 6.119.083 SB, Oktyabrsky, VNRShGIS, 1983,

3.RF, certificate for PM No. 17196, M.Kl. E21B47 / 00, prior. 10.23.2000, prototype.

Claims (1)

An electrical separator for downhole telesystems containing a composite, consisting of at least two parts, a metal casing with a channel for fluid passage, nipple ends of the casing with connecting threads on them, electrical insulation material, respectively, on the casing, on the channel surface and between the casing parts in their joint (mating), characterized in that the nipple ends of both parts of the housing are made with the shanks coaxial to the last, in each of which a bore is made from the end to accommodate the terminals of the electrical connector assembly and in the deep part of the channel bore to accommodate electrical conductors, the electrical conductors for the continuation of the channels made in the details of the housing as a longitudinal groove for forming a channel for the passage of fluid.