RU1808948C - Hydraulic turbine motor bit shaft - Google Patents

Abstract

Usage: drilling wells with downhole motors. SUMMARY OF THE INVENTION: A spindle consists of an oil filled housing formed by a housing, a rotating shaft, and mechanical seals. An axial support, a pulsation compensator, piston and diaphragm lubricators are placed inside the crankcase. A direct oil channel and a bypass oil channel are made in the upper part of the rotating shaft, through which oil circulates. A bypass channel is used to pass the flushing fluid to the pressure pulsation compensator. Plug holes are used to fill the oil into the sealed crankcase and the oil cavities of the lubricators and the oil cavity of the pressure pulsation compensator. 3 ill.

Description

The invention relates to mining, and in particular to sectional turbodrills, and can be used when drilling oil, gas and any other wells.

The aim of the invention is to increase the operating life of the spindle of a turbodrill.

Figure 1 shows a diagram of a spindle of a turbodrill; Figure 2 is a pressure pulsation compensator; Fig. 3 - diaphragm lubricator.

The spindle of the turbo-drill (Fig. 1) consists of an oil-filled sealed crankcase 1 in which are located, an axial support 2, a pressure pulsation compensator 3, a diaphragm lubricator 4 and is limited by a stationary housing 5, a rotating shaft 6 and mechanical seals 7.

The turbo-drill spindle also includes: a piston lubricator 8 located in the upper part of the rotating shaft, a direct oil channel 9 and a bypass

oil channel 10 through which the oil circulates. A bypass channel 11 serves to pass the washing liquid to the pressure pulsation compensator 3.

On the body of the stationary body 5, there are holes with plugs 12, through which oil is poured into the sealed housing 1 and the oil cavities 13, 14, 15 are filled. For bleeding air and excess oil from the sealed housing 1, a safety valve 16 is located at the top of the piston lubricator 8. Flushing fluid from the turbo-drill turbine passes in the turbo-drill spindle through the upper sub 17, radial support 18, underwater channels 19 and central channel 20. part of the washing liquid, through the bypass channel 11, acts through the perforated sleeve 21 on the diaphragm 22 of the pressure pulsation compensator 3. For optimal operation of the rotating elements of the axial support 2,

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the sealed housing 1, in the upper and lower parts of the mechanical seals 7, there are oil cavities of the mechanical seals 23 and oil channels 24 into which oil is supplied from the diaphragm lubricator A under the influence of flushing fluid supplied from the annulus through the hole 25. Flushing movement fluid in the spindle of the turbodrill is shown by arrows (Fig. 1).

The spindle of the turbodrill works as follows.

Before lowering the turbo-drill assembly into the well, the sealed crankcase 1 is filled with oil through special holes 12 with plugs, so that the sealed crankcase 1, oil channels 9, 10, oil cavities 13 (Fig. 3), 14 lubricators 4 and 8 and the cavity 15 (FIG. 2) of the pressure pulsation compensator 3 was filled, while air and excess oil exits through one of the holes 12 or a safety valve 16 located in the piston lubricator 8.

When starting a turbo-drill in the well, flushing fluid from the turbine section of the turbo-drill, passage through the upper translation nickname 17 spindle, radial support 18, underwater channels 19, enters the central channel 20 of the rotating shaft 6 of the spindle and then to the bit for bottom hole. At the same time, part of the washing liquid acts on the piston of the piston lubricator 8, which allows oil to be supplied from the cavity 14 through the channel 9 to the sealed crankcase 1.

And the other part of the washing liquid, the passage through the outlet channel 11, the perforated sleeve 21, acts on the diaphragm 22 of the pressure pulsation compensator 3 and through it on the oil located in the cavity 15 (figure 2), since the diaphragm 22 of the pressure pulsation compensator is made of low inertia elastic rubber, it can significantly reduce the effect of the mass of oil on pressure fluctuations in the oil-filled sealed crankcase 1 of the spindle and provides a constant overpressure during oil leakage in the mechanical seal 7.

When the spindle is in operation, the main load is carried by the axial support 2, while it is warming and heating the oil in the sealed crankcase 1. When heated, the oil expands and the oil-filled sealed crankcase increases the pressure with respect to the pressure of the flushing fluid acting on the mechanical seals 7. When when the specified overpressure in the oil-filled sealed housing 1 is reached, the safety valve 16 located in the upper part of the piston lubricator 8 is opened and a part of the oil flows out flushing fluid flow. When the overpressure drops to a predetermined value, the safety valve closes and an oil leak

ceases.

When oil leaks from the oil-filled crankcase 1, through mechanical seals 7, to protect the rotating elements of the axial support 2, the piston 5 lubricator 8 and the diaphragm are activated

lubricator 4, while the piston lubricator. torus 8 under the influence of washing liquid

feeds oil from its oil cavity 14

to the cavity of the mechanical seal 23 in the upper part of the oil-filled seal housing 1 and along the bypass channel 10 to the cavity 23 of the lower mechanical seal 7, and the diaphragm lubricator 4, under the action of the flushing fluid supplied

5 from the annulus, through the hole 25 (Fig. 3) in the body of the stationary body 5, delivers oil through channels 24 directly to the rotating elements of the axial support 2, maintaining it in working condition.

0 The use of the invention allows, in comparison with the prototype, to ensure efficient and reliable operation of the spindle of the turbodrill due to the complex, combined protection of the axial support in case of leaks

Claims (1)

5 oils from oil-filled pressurized crankcase through seals. SUMMARY OF THE INVENTION A turbo-drill spindle comprising a stationary housing, a rotating shaft, a diaphragm lubricator, radial and axial bearings, seals representing a system of upper and lower mechanical seals, an oil-filled sealed housing, characterized in that 5 that, in order to increase engine life, it is equipped with a piston lubricator with a safety valve located in the upper part of the rotating shaft and a pressure pulsation compensator located in the oil-filled crankcase below the upper mechanical seal, and a direct oil channel is made in the body of the rotating shaft and in the body of the fixed casing a bypass oil channel hydraulically communicating a piston lubricator with cavities of oil-filled sealed crankcase in the area of the upper and lower mechanical seals th, while in the body of the stationary body a bypass channel is made, hydraulically communicating the component 5 1808948 6 a pressure pulsation tracer from the upper washing liquid in the body of the rotating spindle below the underwater channels from the shaft. FIG. 1