RU63861U1 - RESERVED TUBE, CAPILLARY FOR THE SUBMISSION OF CHEMICAL REAGENTS INTO AN EXTERNAL WELL SPACE - Google Patents

Abstract

The utility model relates to equipment for oil wells, and in particular to equipment designed to combat asphalt-resin-paraffin deposits. The tube consists of one or several parallel-mounted capillary tubes, on which a cushion is applied in the form of a winding with tape material and general armor made of steel tapes having a corrosion-resistant coating or made of corrosion-resistant steel.

Description

The utility model relates to equipment for oil wells, namely, equipment designed to combat sediment.

As you know, one of the problems encountered during the operation of oilfield equipment is the prevention of formation and removal of deposits from its surface.

The most widely used methods that contribute to the reduction of formation (for example, asphalt-resin-paraffin deposits) are the dosing of chemical compounds with certain properties into oil. It was also found that the most effective is the method of supplying the chemical directly to the pump intake.

The proposed design allows the supply of a chemical to any depth, including the intake of the pump.

The main structural element of the proposed tube is a capillary (capillaries) made of cable compositions of a block copolymer of propylene with ethylene, resistant to high temperatures, having high resistance to thermooxidative aging, improved antistatic and technological properties, high impact strength. On the surface of the capillary, a winding of tapes of a non-woven fabric or rubberized unvulcanized fabric or tapes of other equivalent material is provided to reduce mechanical stresses

steel tape armor during production and during operation. Armor made of corrosion-resistant steel tapes is superimposed on a wrapped one or more parallel and additionally wrapped capillaries. The steel tape protects the capillary from external mechanical influences, and also perceives the internal pressure arising from the injection of reagents.

The proposed tubes have:

- sufficiently high flexibility in a wide temperature range;

- not large, commensurate with the dimensions of the cables supplying the pump, dimensions;

- the availability of raw materials and the possibility of manufacturing on the equipment of cable plants that produce cables for oil heat pumps;

- ability to work at elevated pressures;

- the anti-seize profile of the armor eliminates scuffing and damage to the tube during tripping, and rewinding, which makes it possible to reuse it.

A general view of an armored, capillary tube for supplying chemicals to the annulus of a single capillary and three capillary wells is shown in FIG. 1 and 2, respectively.

The tube contains one or more capillaries (2) made by extrusion of cable compositions of a block copolymer of propylene with ethylene, and containing a channel for pumping liquid (1). A winding (3) of tapes of a nonwoven fabric or rubberized unvulcanized fabric or tapes of other equivalent material is applied to each capillary; tubes containing more than one capillary have an additional common pillow (5) of tapes of the same

material. Tape armor (4) is placed on top of the winding (3) or common pillow (5). [2]

Literature:

1. M.N.Persiyantsev. Oil production in difficult conditions. Moscow Nedra, 2000.

2. GOST 15845-70 Cable products. Terms and Definitions.

Claims (1)

Armored tube, capillary for supplying chemicals to the annulus of the well, containing one or more capillaries made of a block copolymer of propylene with ethylene or other equivalent material having a winding of non-woven fabric tapes or rubberized unvulcanized fabric, in common capillary tubes over the capillary winding a common capillary of tapes of a non-woven fabric or rubberized unvulcanized fabric, armor made of steel is placed over the capillary winding or the common capillary pillow Flax tape having a corrosion-resistant coating or tapes made of a corrosion-resistant steel.