RU35036U1 - Load-bearing geophysical cable - Google Patents

Description

Load-bearing geophysical cable

The utility model relates to cable technology, namely to cables intended for conducting geophysical surveys in wells and providing hydrodynamic communication using a special channel.

Known geophysical cable containing at least one conductive core, insulation and armor (see GOST R 51978-2002). However, the typical design has a heavy weight and is not corrosion resistant in aggressive environments.

The closest in technical essence to the proposed cable is an armored cable having armor and a sheath of polypropylene material. (See path. USA. No. 3634607, IPC HOIB 7/18, 1970). The disadvantages of the cable prototype is the lack of strength characteristics cable surface material for working through lubricator oil seals and heavy weight due to the use of steel armor.

The task of creating a utility model is to develop the design of a geophysical cable that eliminates the disadvantages of the prototype, which has a lower specific gravity and high corrosion resistance when working in aggressive environments.

The problem is solved by using the features specified in the first paragraph of the utility model formula, common with the prototype, such as a fuso-bearing geophysical cable containing a conductive core, insulation and armor, and distinctive essential features, such as a load-bearing base made of a conductive core and an external armor fiberglass or synthetic fibers, for example Kevlar, or basalt impregnated with an epoxy-polymer binder. This allows you to reduce the weight of the cable and increase its corrosion resistance.

The design feature of the conductive core is reflected in paragraph 2 of the formula, namely, the conductive core is made in the form of insulated wires in general insulation or a metal tube with insulation or a tube of polymer material with a conductive braid. The implementation of the current-conducting conductor in the form of a tube allows you to combine the functions of electrical, hydraulic, and hydrodynamic communication, and thus provide both power to the downhole equipment and the transmission of electrical, hydrodynamic signals, and the ability to supply chemical reagents to the well.

2003126617

Illllliliiilllillilililll

Igoz1gbb17

MPKN01V l / 17; F16Lll / 00

counter-thread along a multiple helix on the cable surface. This allows you to increase the resistance of the cable to abrasive wear, while maintaining flexibility during operation.

The compositional feature of the fuso-bearing base is reflected in paragraph 4 of the formula, namely, between the armor elements there is a fuzo-bearing base made of fiberglass, or synthetic fibers, for example Kevlar, or basalt impregnated with an epoxy-polymer binder. This reduces cable weight and increases corrosion resistance.

The distinctive features indicated above are each separately ™ and all together are aimed at solving the assigned task and are essential. The use of the proposed combination of significant distinguishing features in the prior art is not updated, therefore, the proposed technical solution meets the patentability criterion of “novelty.

A single set of new essential features with common, well-known ones provides a solution to the problem, is not obvious to specialists in this field of technology and indicates that the claimed technical solution has achieved the technical result by creating a geophysical cable design that eliminates the prototype disadvantages, lower specific gravity and with high corrosion resistance for work in affessive environments.

The utility model is illustrated by a description of a specific, but not representative, example of implementation and the accompanying drawings. On a cross section of a cable with a conductive core of insulated wires, armor made of wire and a single-layer midwife; Figure 2 shows a cross-section of a cable with a conductive core of a metal tube, armor made of wire and a single-layer midwife; In Fig. 3, a cross-sectional view of a cable with a conductive core from a tube sewn from a polymer material is given;

Figure 4 shows a cross section of a cable with armor in the form of a tape; In FIG. 5 is a cross-sectional view of a cable with armor in the form of a tape applied by a counter midwife;

Figure 6 shows a cross section of a cable with armor in the form of a tape with tight winding;

Figure 7 shows a cross section of a cable with armor in the form of a wire with a multilayer layer;

The load-bearing geophysical cable contains a conductive core 1, insulation 2 and an external coil of armor 3. (Fig. 1) Between a conductive core I and an external coil of armor 3 there is a fuson support 4 made of fiberglass or synthetic fibers, for example Kevlar, lavsan, etc. or basalt impregnated with an epoxy-polymer binder, for example, epoxy resin ED 20 GOST 1056 / -64 with modifying

additives - polyester resins. The conductive core I is made in the form of insulated wires in general insulation (Fig. 1) or a metal tube with insulation (Fig. 2) or a tube of polymer material with a conductive braid (Fig. 3).

The outer layer of armor 3 consists of a metal wire (Fig. 1,2,7) or a profiled tape located in a single layer (Fig. 4,6) with a multilayer (Fig. 5,7) screed, or a counter screed (Fig. 3) over a multiple helix on the cable surface. Between the elements of the armor 3 there is a load-bearing base 4 made of fiberglass, synthetic fibers, such as Kevlar, or basalt impregnated with an epoxy-polymer binder, (Fig. 1,2,3,4,5,7)

During operation, the cable is lowered to the required depth, and provides an electrical connection to the conductive core 1 with downhole and ground equipment, providing power to the downhole equipment or transmitting a control signal. In the cavity of the tube 1 serves the necessary chemical reagents or other substances in liquid form.

When conducting research, a conductive core in the form of a tube with liquid and twisted armor is used as an information channel for transmitting electrical and hydrodynamic signals to the surface and as a control circuit for downhole tools.

Thus, the proposed design of the utility model will find wide application in geophysical studies of deviated and horizontal wells with cable instruments.

Claims (4)

1. A load-carrying geophysical cable containing a conductive core, insulation and armor, characterized in that between the conductive core and the outer armor armor there is a load-bearing base made of fiberglass or synthetic fibers, for example Kevlar or basalt, impregnated with an epoxy-polymer binder. 2. The cable according to claim 1, characterized in that the conductive core is made in the form of insulated wires in general insulation, or a tube of metal with insulation, or a tube of polymer material with a conductive braid. 3. The cable according to claim 1, characterized in that the armor consists of a metal wire or profiled tape disposed of a single-layer or multi-layer coil, or a counter coil along a multi-helix on the cable surface. 4. Cable according to claims 1 and 3, characterized in that between the armor elements there is a load-bearing base made of fiberglass or synthetic fibers, for example Kevlar or basalt, impregnated with an epoxy-polymer binder.