RU28169U1 - ELECTRICAL DISCONNECTOR - Google Patents

Description

ELECTRICAL TIME

The utility model relates to geosteering equipment designed to provide horizontal and directional drilling of wells for oil and gas.

Known electrical separator designed for downhole telemetry systems according to A. St. SSR No. 1492035, which contains an upper threaded sub, a lower sub rigidly connected to a sleeve connected to the upper sub in a non-circular cross section, an insulating insert placed in a threaded connection, characterized in that the sleeve is threaded to increase operational reliability on the outer surface for threaded connection with the upper sub, the upper part of the lower sub is placed inside the sleeve, while the cross sections of the mating inner surfaces of the sleeve and the upper parts are not He sub non-circular.

The disadvantage of this electric separator: its low technology, due to the manufacture and exact pairing of three parts of complex shape.

Also known electrical separator according to US Pat. RF № 2058472, IPC 6 Е21В 17/00. This sub contains upper and lower metal sub, isolated from each other by dielectric material and interconnected by a sleeve made of two parts, characterized in that the parts of the sleeve are made different, while on the inner surface of the parts of the sleeve and the surface of the upper sub mating with it circular and longitudinal protrusions and grooves are made, the outer surface of the sleeve is made with a tapered thread, and the lower sub with a thread matching it. Disadvantages; complexity of construction and low reliability of the electrical separator.

Known electrical separator according to A. S. of the USSR No. 825881 (prototype), containing metal upper and lower sub and a dielectric spacer between them, completely for example made of composite material.

INC 6 E 21 at 17/12

The disadvantage is the low reliability of the electrical separator, due to the small thickness of the gasket. As a result of this, electrical contact of the upper and lower sub is possible during assembly or during operation.

The task of creating a utility model: improving the reliability of the dielectric

delimiter.

The solution to this problem was achieved due to the fact that the electric separator,

comprising upper and lower metal derpervods made in the form of pipe segments with tapered threads in the upper and lower parts and a dielectric spacer between them made of an insulating material, for example composite material, has a dielectric spacer made in the form of a pipe segment with conical threaded sections on ends and screwed in the upper and lower parts with sections of tapered threads of the sub. The inner diameter of the dielectric spacer is less than the inner diameter of the sub of the electrical splitter. The inner cylindrical surface of the dielectric spacer smoothly interfaced with the inner surfaces of the metal sub of the electrical separator. The pairing is performed in radius.

Studies have shown that the proposed technical solution has novelty and industrial applicability, i.e., all the criteria of a utility model.

The essence of the utility model is illustrated in the drawings of FIG. 1 and 2, where:

In FIG. 1 shows a diagram of the proposed electrical separator.

In FIG. 2 is a diagram of a strength-enhanced electric separator.

The electrical separator (Fig. 1) contains the upper 1 and lower 2 sub. A dielectric spacer 3 is installed between them, which is screwed into the upper 1 and lower 2 metal sub with the help of tapered threaded sections 4 and 5. The dielectric spacer is made in the form of a pipe segment, for example, of

composite material and contains in the upper 4 and lower 5 parts conical thread sections 4 and 5, respectively.

In FIG. Figure 2 shows a reinforced version of the electrical isolator.

The inner diameter of the dielectric spacer 3 is smaller than the inner diameter of the sub of the electrical separator 1 and 2 (di DO). The inner cylindrical surfaces of the dielectric spacer 6 should smoothly be mated with the inner surfaces of the metal sub 1 and 2 of the electric separator by the mating surfaces 7 and 8. The mating can be performed along the radius R. Inside the electric separator, a fixing element 9 can be installed.

During operation of the electric separator as part of the downhole telemetry system, an electrical signal is supplied to the metal sub 1 and 2 and then spreads over the rock to the surface. The presence of a sufficiently long dielectric spacer along the length significantly enhances the reliability of the electrical separator, excluding the closure of sub 1 and 2 during assembly and operation.

d)

3

Author: 08.2002 / t /// Grigashkin G.A.

Claims (5)

1. An electrical divider comprising upper and lower metal sub, made in the form of pipe segments with sections of tapered threads in the upper and lower parts and a dielectric spacer between them, made of electrical insulating material, for example composite, characterized in that the dielectric spacer is made in the form pipe section with tapered threaded sections at the ends and screwed in the upper and lower parts with sections of tapered threads of metal sub.  2. The electrical separator according to claim 1, characterized in that the inner diameter of the dielectric spacer is made smaller than the inner diameter of the metal sub of the electrical separator.  3. The electrical separator according to claim 1 or 2, characterized in that the inner cylindrical surface of the dielectric spacer smoothly interfaced with the inner surfaces of the metal sub of the electrical separator.  4. The electrical separator according to claim 3, characterized in that the pairing is made on a cone or radius. 5. An electrical splitter according to any one of claims 1 to 4, characterized in that a fixing device is installed inside it.