RU171303U1 - DEVICE FOR OPENING THE PRODUCTIVE LAYER BY DRILLING - Google Patents

Abstract

The utility model relates to the oil and gas industry, namely, devices used in the secondary opening of productive formations by drilling to the depth of penetration of the filtrate of drilling, grouting and other polluting formation fluids. A device for opening a productive formation by drilling includes a housing with a drilling unit, a drill, made in the form of a hollow rod with a drill at the end, mechanisms for fixing the housing to the wall of the wellbore, a cassette with the pa placed in it and preloaded cuttings for building a drill, a spindle with protrusions at the end, interacting with grooves on the ends of the pipes for rotating and feeding the drill, a conductor sleeve that ensures alignment of the axis of the pipe that builds up the drill with the axis of the drill and spindle, the housing suspension in the form of a wireline cable, mounted on the end of the spindle with the possibility of free rotation and movement of the ring on it, as well as stops that limit the extreme position of the ring on the spindle when it moves in both directions. In the drilling unit, a compartment is made in which a conductor sleeve, a part of the cartridge with nozzles for increasing the drill, a spindle end interacting with the drill, and an end of the drill, the compartment is connected via a channel to the pump and hermetically sealed with the conductor bush, spindle, drill and cartridge It is isolated from other nodes of the device. A useful model improves the reliability of the device.

Description

The utility model relates to the oil and gas industry, and in particular to devices used in the secondary opening of productive formations by drilling to the depth of penetration of the filtrate of drilling, grouting and other polluting process fluids.

A device is known for the secondary opening of the reservoir by drilling, including a tubular body with a drilling unit located therein for rotating and supplying the drill to the borehole wall, a drill made in the form of a hollow rod with a cutter at the end, a drill flushing unit, housing fixing mechanisms to the borehole wall , a cassette with a drill and drill sleeves placed in it for building it up and a housing suspension in the form of a wireline cable. The cutter and drill sleeves (nozzles) have hollows that engage with protrusions at the end of the spindle and feed and rotate the drill [1].

In this device, when building the drill, the drill sleeve is fed into the conductor under the action of a compressed spring. In this case, if the sleeve enters the space between the protrusions of the spindle, the sleeve may jam the spindle, which will lead to breakdown of the device parts.

A disadvantage of the known device is its low reliability.

The closest to the proposed utility model and taken as a prototype is a device for the secondary opening of the reservoir by drilling, including a housing with a drilling unit located in it, a drill made in the form of a hollow rod, with a drill at the end, mechanisms for fixing the housing to the wall of the wellbore, cassette with nozzles for drilling auger placed in it and preloaded by a spring, a spindle with protrusions at the end, interacting with grooves on the ends of the nozzles for rotating and feeding the drill, conductive sleeve, weight the axial axis alignment of the branch pipe that builds up the drill with the axis of the drill and spindle, as well as the housing suspension in the form of a wireline cable, while the compartment has a compartment in which the conductive sleeve is placed, part of the cartridge with nozzles for building the drill, the end of the spindle interacting with drill, and the end of the drill, and the compartment through the channel is connected to the pump and together with the conductive sleeve, spindle, drill and cassette is hermetically isolated from the other nodes of the device [2].

In this device, as well as in the analogue, when building the drill, the drill sleeve, falling into the space between the protrusions of the spindle, can jam the spindle, which will lead to breakage of the device parts.

A disadvantage of the known device is also low reliability.

The technical result is an increase in the reliability of the device.

The technical result is achieved by the fact that in a device for opening a productive formation by drilling, including a housing with a drilling assembly located in it, a drill made in the form of a hollow rod with a drill at the end, mechanisms for fixing the housing to the wall of the wellbore, a cassette with and placed in it spring nozzles for building up the drill, a spindle with protrusions at the end, interacting with grooves on the ends of the nozzles to rotate and feed the drill, a conductor sleeve that ensures alignment of the axis of the nozzle its drill, with the axis of the drill and the spindle, as well as the suspension of the housing in the form of a logging cable, while in the drilling unit there is a compartment in which the conductive sleeve is placed, a part of the cassette with nozzles for building up the drill, the end of the spindle interacting with the drill, and the end of the drill moreover, the compartment through the channel is connected to the pump and, together with the conductor bush, spindle, drill and cartridge, is hermetically isolated from the remaining components of the device, introduced on the end of the spindle with the possibility of free rotation and movement of the ring on it, and also stops that limit the extreme position of the ring on the spindle when it moves in both directions.

New is the fact that the ring installed on the end of the spindle with the possibility of free rotation and movement along it is introduced into the device for opening the reservoir, as well as stops that limit the extreme positions of the ring on the spindle when it moves in both directions.

The inventive utility model is illustrated by drawings.

In FIG. 1 shows a device lowered on a logging cable into the zone of the reservoir; in FIG. 2 - the position of the ring during the working stroke of the spindle with open grooves; in FIG. 3 - the position of the ring before feeding the pipe at idle spindle at the time of closing the gaps between the protrusions on the end of the spindle; in FIG. 4 - the moment of jamming of the spindle when the nozzle falls into the gap between the grooves.

The device comprises a housing 3 lowered into the wellbore 1 on a wireline 2, in which a drilling unit 4 is located, interconnected by mechanical, hydraulic and electrical systems, including a drill 5, made in the form of a hollow rod that is stacked with nozzles 6 with a drill 7 at the end, coaxial with drill 5 a spindle 8 with transmission elements of rotation and supply to the drill 5, made in the form of protrusions 9, interacting with the grooves of the nozzles 6; a conductor sleeve 10 for combining the axes of the spindle 8 and the drill 5 with the axis of the pipe 6 when building the drill. For connection between themselves and the drill 7, the nozzles 6 have connecting elements made, for example, in the form of a thread. The nozzles 6 are placed in the cassette 11 mounted in the pipe 12, and are preloaded by the spring 13. The cassette 11 is located below the drilling unit 4 and partially in it. The end of the spindle 8, part of the cassette 11 and the conductor sleeve 10 with another pipe 6 for moving the drill 5, as well as part of the drill 5 are located in the compartment 14 made in the drilling unit 4 and are hermetically isolated from the rest of the device.

The flushing unit consists of a pump (not shown in the drawing) connected by a channel 16 to a compartment 14 located in the drilling unit 4.

Fixing the casing 3 in the wellbore 1 is carried out by the fixing mechanisms 15. The drive mechanisms of the device is carried out by an electric motor 16, which is powered by a wireline cable 2. At the end of the spindle 8, the ring 17, as well as the stops 18, limiting the extreme positions are installed with the possibility of free rotation rings 17 on the spindle 8 when it moves in both directions. The ring 17 is in contact with the conductor sleeve 10 and the pipe 6 and is installed in such a way that in one position it closes the space between the protrusions 9, in the other opens them for interaction with the grooves of the pipes 6.

As an emphasis, a ring-lock 18 installed in the groove of the spindle 8 can be used, which interacts with the side surfaces of the groove 19 made on the inner surface of the ring 17.

The device operates as follows.

The device is lowered into the wellbore 1 to the required depth after starting the electric motor 16 from the ground control panel (not shown in the drawings) by the locking mechanisms 15. At the same time, the pump for supplying flushing fluid to the compartment 14 and the drilling unit 4 starts working. The spindle 8, moving back- progressively during the working stroke towards the side of the wall of the wellbore, it engages with the drill 7, which first drills the wall of the wellbore 1 and then deepens into the formation. With the reverse (idle) stroke of the spindle 8 in the conductor sleeve 10, space is released for the next nozzle 6, which is fed there under the action of the spring 13. Next, the spindle 8 engages with the nozzle 6 and screw it into the drill 7. Then the drill 7 and the nozzle 6, as a whole, they continue to go deep into the formation to the working length of one pipe 6. The process of building up the core of drill 4 is repeated and continues until there are no pipes 6 left in the cassette 11.

When the spindle 8 moves to the side of the borehole wall 1 by friction against the surface of the conductor sleeve 10 and nozzle 6, the ring 17 moves along the spindle 8 and opens the protrusions 9 to interact with the grooves of the nozzles 6. When the spindle 8 moves idle, the ring 17 moves to in the opposite direction and closes the gaps between the protrusions 9 at the end of the spindle 8, preventing nozzles 6 from falling into them and excluding jamming of the spindle 8.

The flushing fluid in compartment 14 is under pressure. When the spindle 8 is idling, the flushing fluid is pumped into the drill cavity 5 directly from the compartment 14, and during the working, through the gap between the ends of the protrusions of the spindle 8 and the grooves of the nozzle 6. Overpressure in the compartment does not allow the sludge to penetrate into its inner zone.

Oscillations of the load during working and idling affect the characteristics of the current supplying the electric motor 16, and are recorded by devices located on the surface of the earth. After no nozzle 6 remains in the cassette 11, the reverse of the electric motor 16 is turned on, the housing 3 is unlocked and removed from the well 1.

The claimed technical solution improves the reliability of the device.

Information sources

1. Patent of the Russian Federation No. 2232873 from 01/23/2003.

2. Patent of the Russian Federation No. 98045 dated 06/11/2010.

Claims (1)

A device for the secondary opening of the reservoir by drilling, including a housing with a drilling unit located in it, a drill made in the form of a hollow rod with a drill at the end, mechanisms for fixing the housing to the wall of the wellbore, a cassette with nozzles for growing auger placed in it and preloaded by the spring, a spindle with protrusions at the end, interacting with grooves on the ends of the nozzles for rotating and feeding the drill, a conductor sleeve that ensures alignment of the axis of the nozzle that builds up the drill with the axis of the drill and spindle, and There is also a housing suspension in the form of a logging cable, while in the drilling unit there is a compartment in which a conductor sleeve is placed, a part of the cassette with nozzles for building up the drill, the end of the spindle interacting with the drill, and the end of the drill, and the compartment is connected to the pump via a channel and together with a conductor sleeve, spindle, drill and cassette is hermetically isolated from the other nodes of the device, characterized in that it contains the ring mounted on the end of the spindle with the possibility of free rotation and movement along it, as well stops limiting the extreme positions of the ring on the spindle during its movement in both directions.

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