RussianPatents.com

Protector for well power cable. RU patent 2250977.

IPC classes for russian patent Protector for well power cable. RU patent 2250977. (RU 2250977):

E21B19 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables (surface drives E21B0001020000, E21B0003020000)

E21B17/10 - Wear protectors; Centralising devices (drives used in the borehole with anchoring means E21B0004180000; guiding or centralising devices outside the borehole E21B0019240000)

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FIELD: mining industry.

SUBSTANCE: protector has body of sections, made with possible mutual connection at a well. Body is made with possible mounting at an end of tubing pipes column sleeve. Sections have inner channels for interaction with tubing string, groove for driving power cable and are made with extension at outer surface. Lower section at an end is made with circular recess, and upper - with matching circular groove. Groove for driving power cable is made open in extension at an angle to body axis. In side walls of open groove, in parallel to body axis, inner grooves are made for holding power cable.

EFFECT: higher manufacturability, simplified assemblage, higher reliability.

8 dwg

The invention relates to the field of mining, in particular to the oil and gas industry, and can be used to protect the power cable from mechanical damage during descent-ascent suspension tubing with the installation of electrical submersible pump in the well.

Known protector to protect the power cable in the well, containing the appropriate split housings, fasteners and holes Rethimno key [1, 2].

The disadvantages of the known protectors [1, 2] are the design complexity, difficulty in manufacturing, the inconvenience in Assembly and disassembly of the well.

Known protector to protect the power cable in the borehole containing made with the possibility of installation on the end face of the coupling tubing (tubing) housing sections made with the possibility of mutual connections in the well and having internal channels for communication with the tubing and the groove for laying of power cable size for power cable.

The disadvantages of the known protector [3] are the design complexity, low-tech, difficulty in manufacturing, the inconvenience in Assembly and disassembly of the well.

The objective of the invention is to reduce the element base design protector to protect the power cable in the borehole, to improve the processability during manufacture, the ease of use when assembling and dismantling the well, to increase reliability and competitiveness.

The technical result is achieved by the fact that the protector to protect the power cable in the borehole containing made with the possibility of installation on the end face of the coupling tubing (tubing) housing sections made with the possibility of mutual connections in the well and having internal channels for communication with the tubing and the groove for laying of power cable size for power cable, characterized in that section made a profit on the outer surface, while the lower section at the end with the annular bore, and the upper section with a corresponding circular groove for mutual connection of the sections, the groove for laying power cables made in profit open at an angle to the axis of the housing, with the side walls of the open groove parallel to the axis of the case is made of internal grooves for fixing the aforementioned power cable screwing the tubing and couplings tubing in the well.

Figure 1 shows the protector to protect the power cable when installing the power cable on the well.

Figure 2 cross section A-a in figure 1.

Figure 3 variant mounting on a power cable with parallel open grooves.

Figure 4 option of mounting the sections on the power cable crossing the open slots.

Figure 5 connection of the sections on the power cable with parallel open and closed grooves.

Figure 6 connection of the sections on the power cable crossing the open and parallel closed grooves.

7 connection of the sections on the power cable with an open groove is made at an angle to the axis of the housing, and an open groove, is made parallel to the axis of the housing.

On Fig depicted protector to protect the power cable at the wellhead before screwing the tubing and couplings.

Protector to protect the power cable in the borehole contains:

the bottom section 1,

the upper section 2,

internal channels of sections 3 to communicate with the tubing,

an annular bore 4,

an annular groove 5,

profit 6,

outdoor groove 7 for power cables, made in profit 6 at an angle β to the body axis,

internal grooves 8 for fixing the power cable screwing the tubing and couplings NTK well.

In a static position the elements of a protector to protect the power cable in the borehole interact as follows.

Over the mouth of the well bottom 1 and top 2 sections through the open grooves 7 is installed in the power cable (figure 3, 4), down to the clutch and deploy on the corner β (5, 6, 7), combining an annular bore 4, is made in the lower section 1, with the annular groove 5 in the top section 2 and section Assembly mounted on the end face of the coupling.

When this power cable will take its position in the inner grooves 8, is made parallel to the axis of the housing, the side walls of the open grooves 7, which in turn is made in the profit 5.

Pump-compressor pipe lifting mechanism on the well freely inserted into the sleeve through the inner channels 3, made in sections protector (Fig).

In the process of screwing the tubing into the fitting bottom section 1 interacts with the butt-coupling and through the internal channels of sections 3 to communicate with the NTC, the upper section 2, made for example, from an elastic material, with a certain force is stretched on the pump tubing.

In the process of screwing the tubing into the fitting power cable passing through the inner grooves 8, eliminates the twisting of the sections relative to the coupling.

The presence of the circular bore 4 in the lower section 1 and the circular groove 5 in the upper section 2 provides the convenience of mutual connection of the sections in the borehole and in the manufacture of, for example, the lower section 1 of the metal will protect the threaded surface of the tubing during its insertion into the coupling from mechanical damage.

In the process of running, lifting of the suspension tubing with electrical submersible pump and power cable in areas of curvature of the casing, especially in deviated or horizontal wells, mechanical contact between the inner diameter of the production casing and the sections of the protector with the power cable.

Power cable, laid in the inner grooves 8 of the sections of the protector, made in the profit 6, when the descent of the lifting of the suspension tubing is protected from mechanical damage (Fig 1, 2).

Proposed new technical solution of the protector to protect the power cable in the well from damage when performing a descent-ascent suspension tubing differs from the known technical solutions novelty, technology in the manufacture, convenient for installation and dismantling at oil wells, reliable in operation, competitive, and its use in production will provide a positive technical and economic effect.

The level of technical solutions offered protector to protect the power cable in the borehole has no analogues in the Russian Federation and abroad.

Sources of information

1. US No. 4042023, 1977.

2. US No. 3893778, 1975.

3. EN 2120537, 1998.

Protector to protect the power cable in the borehole containing made with the possibility of installation on the end face of the coupling tubing (tubing) housing sections made with the possibility of mutual connections in the well and having internal channels for communication with the tubing and the groove for laying of power cable size for power cable, characterized in that section made a profit on the outer surface, while the lower section at the end with the annular bore, and the upper section with a corresponding circular groove for mutual connection of the sections, the groove for laying power cables made in profit open angle to the body axis, with the side walls of the open groove parallel to the axis of the case is made of internal grooves for fixing the aforementioned power cable screwing the tubing and couplings tubing in the well.