RU83535U1 - DRILL PIPE WITH WEAR-RESISTANT UNITS - Google Patents

Abstract

A drill pipe with wear-resistant assemblies, including a centering and guide assemblies with a wear-resistant surface, characterized in that the centering assembly is made in the middle part in the form of a thickening of the body of the drill pipe with conical transitions at the ends, and the guide is in the form of an additional lock with internal and external threads along the ends connected by corresponding threads to both drill pipe locks, while the outer sections of the drill pipe, subject to the greatest wear, are also equipped with a wear-resistant surface, while m all wear-resistant surfaces are made in the form of belts reinforced with wear-resistant inclusions.

Description

The proposed utility model is intended for the oil and gas industry, namely, for drilling devices and is intended to protect against wear and centering of the drill pipe.

The well-known "Lock for tubing or drill pipe" (patent for PM RU No. 22374, ЕВВ 17/02, 19/00, F16L 15/08, publ. 03/27/2002), consisting of the nipple part of the adapter with the outer and the internal thread, while the thread of the nipple and the coupling contains a wear-resistant layer with a thickness on the side surfaces and the top of the thread profile 0,01-0,06 thread pitch with a decrease in the thickness of the above-mentioned wear-resistant layer in the thread cavity is approximately 1.5 times, and at the end of the adapter a flat annular surface with a width of approximately 0.03 outer diameter and the top of the adapter.

The disadvantage of this device is the vulnerability of the outer surface from wear and, as a result, poor protection of the ends (locks) of the drill pipe.

Also known is “Tread for a drill pipe with welded joints” (patent RU No. 2208123, ЕВВ 17/10, 17/02, publ. 07/10/2003), comprising an integral body of rigid material having a longitudinal hole for putting on with a diametrical clearance on the pipe, and the casing fixing element located in the specified gap on the pipe surface, while the longitudinal hole in the tread body is made with the smallest diametric size, which is larger than the outer diameter of the upset at the end of the pipe for welding the locking part, but smaller than the outer diameter weldable lock parts.

The disadvantages of this device are the vulnerability to wear of the ends of the pipe and sections outside the tread.

The closest in essence and the achieved result is "Guide or centering node of the drill pipe (options)" (patent RU No. 2280750, ЕВВ 17/10, publ. 07/10/2003), containing a housing with a layer (interchangeable blades in the grooves) increased hardness on the outer surface, while the layer of high hardness is divided into parts by a transverse groove, the depth of which is not less than the thickness of the layer of high hardness.

The disadvantages of this device are:

• insecurity from wear of the ends (locks) of the pipe;

• vulnerability to wear of areas outside the tread;

• a harder surface layer (interchangeable blades in the grooves) quickly fails under alternating bending loads, and the presence of a transverse groove in it is a stress concentrator under the same loads leading to a quick failure of the pipe body itself.

The technical task of the proposed utility model is to create a durable and reliable drill rod by protecting locks, centralizers and the most worn outer surfaces with wear-resistant and plastic outer belts reinforced with wear-resistant inclusions.

The technical problem is solved by a drill pipe with wear-resistant nodes, including centering and guide nodes with a wear-resistant surface.

What is new is that the centering unit is made in the middle part in the form of a thickening of the body of the drill pipe with conical transitions at the ends, and the guide assembly is an assembly in the form of an additional lock with internal and external threads at the ends connected by corresponding threads to both locks of the drill pipe, the outer sections of the drill pipe, subject to the greatest wear, are also equipped with a wear-resistant surface, and all wear-resistant surfaces are made in the form of belts reinforced with wear-resistant inclusions.

1 and 2 show the end sections of the drill pipe.

Figure 2 shows the middle part of the drill pipe.

Drill pipe 1 (Figs. 1, 2 and 3) includes a centering 2 (Fig.) And guides 3 (Fig. 1) and 4 (Fig. 3) nodes with a wear-resistant surface 5 (Figs. 1, 2 and 3). The centering unit 1 (figure 2) is made in the middle part in the form of a thickening of the body of the drill pipe 1 with conical transitions 6 and 7 at the ends. The guide assembly 3 (Fig. 1) or 4 (Fig. 3) is made in the form of an additional lock 3 (Fig. 1) or 4 (Fig. 3) with an internal 8 (Fig. 1 and 3) and an external 9 thread (one or two-stage) at the ends connected by the corresponding threads 8 (Fig. 1) or 9 (Fig. 3) to both respective locks 10 (Fig. 1) or 11 (Fig. 3) of the drill pipe 1. External sections 12 (Fig. 3 ) of the drill pipe 1, subject to the greatest wear, are also equipped with a wear-resistant surface 5. All wear-resistant surfaces 5 (Figs. 1, 2 and 3) are made in the form of belts reinforced with wear-resistant inclusions 13.

The outer sections 12 (Fig. 3) of the drill pipe 1 subject to the greatest wear are determined in practical terms: during practical tests on wells (not shown in Fig.), Drill pipes 1 of a similar design (with a centering unit 2

in the middle part - FIG. 2) these sections 12 (FIG. 3) are determined by measuring and determining the minimum wall thicknesses of drill pipe 1. Very often, such places are also places 12 for clamping and rotary keys (not shown in FIG. 3).

The belts 5 of the drill pipe 1 and additional locks 3 (Fig. 1) or 4 (Fig. 3) can be made in the following ways, for example: when producing on not yet hardened surfaces, they are rolled in with a carbide, ceramic, etc. roller. with crumbs followed by rolling with a solid roller to flush the pipe surface, or heating the pipe surface 1 with microwave waves and pressing it with a roller of wear-resistant inclusions 13 (Figs. 1, 2 and 3) of hard alloy, high-speed or wear-resistant steel, ceramic chips or the like, or using pre-drilling, followed by soldering or pasting of these inclusions 13. Then connect by welding (for example, friction or electric arc) all sections 2 (2) and 12 (3) (with the exception of additional locks 3 - Fig. 1 and 4 - figure 3) with the body of the drill pipe 1. When welding the centering node 2 (figure 2), the welds 14 should be within the conical transitions 6 and 7 of this node 2.

Due to this design, all nodes 3, 10 (FIG. 1) 2 (FIG. 2) 4, 11 and 12 (FIG. 3) of the drill pipe 1 have the same ductility as a similar pipe 1 without a wear-resistant surface 5, since there is no on these sections of a continuous surface, but only interspersed 13. In this case, the wear resistance of the drill pipe 1 due to the protection of the nodes 10 (Fig. 1) and 2 (Fig. 3) and the outer sections 12 (Fig. 3) of the drill pipe 1 are subject to the greatest wear, superior to analogues. During industrial tests (at the wells of NGDU Aznakaevneft and NGDU Almetyevskneft), drill pipe 1 of the proposed design when working in difficult in direction (including inclined and horizontal-inclined) wells turned out to be more wear-resistant and workable in 1.5- 2 times when compared with similar drill pipes equipped with wear-resistant surfaces.

The proposed design of the drill pipe is 1.5-2 times more durable and wear-resistant than similar pipes with wear-resistant surfaces due to the protection of locks, centralizers and the most worn-out outer surfaces with wear-resistant and plastic outer belts reinforced with wear-resistant inclusions.

Claims (1)

A drill pipe with wear-resistant assemblies, including a centering and guide assemblies with a wear-resistant surface, characterized in that the centering assembly is made in the middle part in the form of a thickening of the body of the drill pipe with conical transitions at the ends, and the guide is in the form of an additional lock with internal and external threads along the ends connected by corresponding threads to both drill pipe locks, while the outer parts of the drill pipe subject to the greatest wear are also equipped with a wear-resistant surface, while m all wear-resistant surfaces are made in the form of belts reinforced with wear-resistant inclusions.