RU37138U1 - DRILL PIPE ELECTRIC SEPARATOR - Google Patents

Description

200 3121827

Drill pipe electric splitter

The utility model relates to the field of geophysical studies of oil wells during drilling, namely to devices for transmitting depth information through a drill pipe string, and is intended for electrical separation of the drill string at the installation site of the downhole part of the equipment.

The closest in technical essence and the achieved result to the proposed utility model is an electric separator of the drill pipe string, containing sub, interconnected and isolated from each other by a threaded strip of non-conductive material installed between the profiles of the connecting threads. The joint of the sub on the inside is sealed with a gasket of elastic material. The sub is coated inside and out with electrical insulating material (US Patent No. 2917704, CL 324-1, published. 1960).

A disadvantage of the known eleuric separator is the weakening of the threaded connection by reducing the wall thickness of the metal sub above and below the threaded conical section by the thickness of the outer and

the inner layers of electrical insulating material, which is about the purpose of increasing the service life under conditions of intense wear and tear in the mud flow is usually taken to be several millimeters (3-6 mm).

MKI7: Е21В 17/12; 17/046

   f. Si

Such a decrease in the wall thickness of the metal sub is unacceptable for small diameter drill columns.

Another disadvantage of the known electrical separator is the low-tech design associated with high requirements, with the accuracy of the manufacture of tapered threads of metal sub to ensure the specified compression of the gasket from an elastic material, which serves to seal the joint from the inside. If the gasket is not enough rounded, the joint is not sealed, and if it is compressed excessively, the gasket is extruded from the joint.

The technical result, the achievement of which the creation of this useful model of fir is aimed at, is to increase the strength of the threaded connection of metal sub above and below the threaded conical section, as well as to increase the manufacturability of the design of the separator by reducing the strength requirements for the manufacture of conical threads of the sub.

The technical result is achieved by the fact that in the eleuric separator of the drill pipe string, including two inside and outside with an insulating material of a metal sub, interconnected and isolated from each other by a threaded washer of conductive material installed between the profiles of the connecting threads, and a gasket for sealing the junction of metal sub on the inside, - additionally introduced a metal sleeve and one or more rings of elastomer, Formation at the top of the top sub, the inner layer of insulating material is formed as a tube segment from a rigid electrically non-conductive material disposed in the upper cylindrical portion of the threaded subs conical portion and the threaded end of the conical portion of the nipple skhgoronu subs in the device caused the outer layer of insulating material.

The drawing shows an electrical splitter drill pipe string, a longitudinal section.

The electric separator includes metal upper 1 and lower 2 sub, between the threaded conical sections 3 of which a gasket 4 is installed, made of an insulating material.

On the lower 2 sub, from the threaded conical section 3 and towards the nipple part of the device, an outer 5 layer of electrical insulation material is applied, the thickness of which is selected from the condition of maintaining the strength properties of the lower 2 sub.

In the upper part of the threaded conical section 3, at the junction of the sub 1 and 2, a gasket b of elastic material is installed, located on the inner surface of the upper 1 sub, in the upper cylindrical part of the threaded conical section 3.

The inner layer 7 of the insulating material is made in the form of a pipe segment of rigid non-conductive material installed in the top 1 of the sub between the gasket 6 and the metal sleeve 8 installed in the upper part of the sub 1, for example, by welding or threaded connection after creating the force required for compression gasket 6.

To seal the gap between the upper sub 1 and the inner layer 7 of the insulating material, one or more rings 9 are installed, made of elastomer and protecting against penetration of the drilling fluid.

oiLly Id MO (The location of the outer 5 and inner 7 layers of electrical insulation material on the metal surfaces of the sub 1 and 2 allows you to make the walls of the sub 1 and 2 on the threaded conical section 3 of the greatest possible thickness, which ensures their greatest strength in the required dimensions.

And since the force required for rolling the gasket 6 is created independent of the mutual axial position of the sub 1 and 2, the requirements for the accuracy of the manufacture of tapered threads in sections 3 are reduced, which significantly increases the manufacturability of the design of this electric drill string separator.

A search by the applicant for scientific, technical and patent sources of information and a prototype selected from the list of analogues made it possible to identify distinctive features in the claimed technical solution; therefore, the inventive electric drill pipe splitter satisfies the utility model criterion of “novelty.

The utility model criterion “industrial applicability is confirmed by the fact that this electric drill pipe splitter can be successfully used as an electromagnetic communication channel for cableless downhole transmission of information. Director K.A. Davydov

Claims (1)

Electric separator of the drill pipe string, including two, coated inside and outside with insulating material, metal sub, interconnected and isolated from each other by a threaded strip of non-conductive material installed between the profiles of the connecting threads, and a gasket for sealing the joint of the metal sub on the inside, characterized in that an additional metal sleeve and one or more elastomer rings installed in the upper part of the upper of its sub, the inner layer of insulating material is made in the form of a pipe segment of rigid non-conductive material located in the upper cylindrical part of the threaded conical section of the sub, and from the end of the threaded conical section of the sub to the side of the nipple part of the device, an outer layer of electrical insulating material is applied.