RU2652010C1 - Target type multi-section gas separator for tilt-directional wells (variants) - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: group of inventions refers to equipment for ensuring deep-pumping operation of producing wells. Multi-section gas separator comprises a series of successively placed inverted plate discs disposed concentrically on the suction port with radial channels, gas discharge pipes, each one is located on the outer surface of the plate disc parallel to the suction nozzle. Plate discs are articulated on the suction nozzle. Each vertical axis of the pipe of the overlying plate disc is successively biased relative to each vertical axis of the pipe of the underlying plate disc, with the possibility of being formed by the pipes of a spiral channel. Suction nozzle for hinging movement of each plate disc contains circumferential hinge tides, radial channels of the suction nozzle are located directly above each of the circumferential hinge tides adjacent to it, the plate discs have counterbalances on the outer part. Each pipe has two parts and configured to bend them with respect to each other and to turn the upper part of the pipe from a vertical position and vice versa by contacting the overlying plate disc with underlying pipe on the sloping section of the well. In each upper part of each pipe inside the valve is installed above it with the possibility of the gas-liquid mixture coming from the pipe above it, not allowing the liquid to flow down the inner cavity of the pipe downward.

EFFECT: technical result consists in increasing the separation ability while working in the wellbore of an oblique-directed well.

2 cl, 1 dwg

Description

The invention relates to equipment for separating and deep-pumping production of directional wells, in particular to devices for separation (gas separation) at the reception of downhole pumps, namely gas separators (anchors), and can be used for separation and pumping from well fluids.

The closest to the proposed technical essence and the achieved result is a multi-section dish-type gas separator for directional wells, containing a series of inverted disk disks sequentially placed one below the other, concentrically mounted on the suction nozzle with radial channels, gas exhaust pipes, each of which placed on the outer surface of the disk disk parallel to the suction pipe, and the disk disks are pivotally mounted on the suction present pipe, each vertical axis of the tube overlying the poppet disc successively offset relative to the vertical axis of each tube plate of the underlying disc to form a spiral channel tubes (SU 1601361, IPC E 21 B 43/38, 23.10.1990).

This separator has a fairly high separation ability when working in the wellbore of a directional well. However, it has the following disadvantages:

- the radial channels of the suction pipe are located above each of the disk disks, while when the section of the well is tilted, the position of the disk changes and the position of the channel remains unchanged;

- the disk disks have a counterweight in the form of a sleeve on the inside, because of which the moment arising from the counterweight is insufficient (too little shoulder — the distance between the hinge and the counterweight is intentionally minimized);

- swivel is leaking, which reduces the separation ability;

- an annular gap is formed between each lower part of the counterweight and each upper end of the underlying disk disk, at different angles of inclination of the borehole sections this gap will change, nullify, which can lead to jamming of the disk disks.

The specified annular gap in the prototype will move along the axis relative to the radial holes of the suction pipe with different inclination of the directional wells. Thus, the holding capacity of the disk disk in this case will change: if the gap does not coincide with the radial hole, and the liquid may not accumulate on the disk disk at all, as a result, it will not enter the suction pipe. The separation ability will decrease, and it will depend on the angle of inclination of the well. Another disadvantage of the prototype is the presence on the inner side of the disk disks of the counterweights in the form of bushings, which significantly reduces the angle of the possible inclination of the disk disks, and also requires a large weight of these balances. The angle of a possible tilt is also reduced by the stationary tubes, which can jam the upstream disc disk.

In connection with the foregoing, the technical result of the invention is independence from the angle of inclination of the section of the well of separation ability, and thereby increase the separation ability when working in the wellbore of a directional well.

The specified technical result is solved by the fact that in a multi-section gas separator of a disk type for directional wells, containing a series of inverted disk disks sequentially placed one below the other, concentrically mounted on the suction nozzle with radial channels, gas exhaust pipes, each of which is located on the outer the surface of the disk disk parallel to the suction nozzle, and the disk disks are pivotally mounted on the suction nozzle, each vertically the axis of the tube of the overlying disk plate is sequentially displaced relative to each vertical axis of the pipe of the underlying disk disk with the possibility of forming a spiral channel by the tubes, according to the first embodiment, there are circumferential articulated tides on the suction pipe for articulating movement of each disk disk, radial channels of the suction pipe are located directly above each of the circular articulated tides adjacent to it, disk disks have counterweights on the outside, and on the inside at the bottom — a surface congruent to the hinged tides, while there is an annular gap between the indicated congruent surface and the outer surface of each disk disk, each disk disk made of two longitudinally connected halves, and each tube made of two parts with the possibility of bending them relative to friend and with the possibility of rotation of the upper part of the tube from a vertical position and back when the contact of the upstream disc disk with the downstream tube on lonnom well site, the top of each tube on top of it, with a valve Incoming gas-liquid mixture from the tube above it without allowing fluid to flow down along the inner cavity of the tube down.

According to the second variant, a multi-sectional gas separator of a disk type for directional wells contains a series of successively inverted disk disks arranged concentrically on the suction pipe with radial channels, gas exhaust pipes, each of which is placed on the outer surface of the disk disk parallel to the suction pipe moreover, the disk discs are pivotally mounted on the suction nozzle, with each vertical axis of the overlying tube the disk-shaped disk is sequentially shifted relative to each vertical axis of the tube of the underlying disk-shaped disk with the possibility of formation by the tubes of a spiral channel. The difference in the second option is that the suction nozzle for hinged movement of each disk disk contains circumferential articulated tides, the radial channels of the suction nozzle are located directly above each of the circumferential articulated tides, the disk disks have counterweights on the outer part, and on the inside - a surface congruent to the articulated tides, while there is an annular gap between the specified congruent surface and the outer surface of each disk disc moreover, each disk disk is made of one piece of elastic material with the possibility of elastic deformation to install the disk disk on the hinged tide of the suction pipe, each tube is made up of two parts with the possibility of bending relative to each other and with the possibility of rotation of the upper part of the tube from a vertical position and vice versa, when the upstream disk disk contacts the downstream pipe in an inclined section of the well, in this case, in each upper part of the pipe above it a valve is installed with the possibility of a gas-liquid mixture from the tube above it, which does not allow liquid to flow down the inner cavity of the tube.

The causal relationship of the hallmarks is as follows. The liquid under the disk will not drain down the lower part of the counterweight (as in the prototype), but along the suction pipe itself, and then into the radial channel of the suction pipe located directly above the articulated tide adjacent to it. The disk disk does not have an internal counterweight in the form of a sleeve, and also has a composite bending tube for gas removal, so its inclination can be increased in directional wells with a large inclination angle. The circumferential articulated tides will not wedge the disc disks mounted on them, the counterweights on the outer part of the disc disks will contribute to the high sensitivity of the disks from the inclination of the well, since the shoulder will increase from the hinge to the counterweight. A valve installed in each upper part of the tube above it allows the gas-liquid mixture to flow from the tube above it, while not allowing the liquid formed under the disk (especially adhering to its walls) to flow down the inner cavity of the tube, without clogging the inner cavity of the tube with separated liquid the time of its contact with the disk in the inclined section of the well. Thus, there is an increase in separation ability when working in the wellbore of a directional well

In FIG. 1 shows the construction of a multi-plate gas-type separator for directional wells.

The multi-section gas separator of a disk type for directional wells contains a series of successively inverted disk disks 3, arranged concentrically on a suction nozzle 1 with radial channels 2 and an axial channel 6. The separator also contains tubes 5 for exhausting gas, each of which is placed on the outer (upper) surface 4 of the disk disk 3 parallel to the suction pipe 1 and communicates the cavity under the disk disks 3. The disk disks 3 are pivotally mounted on the inlet vayuschem pipe 1, each vertical axis of the tube plate 5 overlying disc sequentially shifted by 10-180 ° angle relative to each vertical tube axis 5-lower poppet disc to form a spiral channel tubes.

On the suction pipe 1 for the articulated movement of each disk disk 3 there are circular articulated tides 7, for example, annular (see Fig. 1), spherical. The radial channels 2 of the suction pipe 1 are located immediately above each of the adjacent articulated tides 7 adjacent to it, thereby the liquid does not stagnate above the articulated tide, always combining the annular gap 9 of the upper part 4 of the disk disk with one of the radial channels 2 located on the same circle adjacent with a hinge in an amount of, for example, from 2 to 50 (see Fig. 1). Each disk disk 3 has on the outer part (from the side of the borehole wall) of the disk a counterweight 8 concentric to the suction pipe. The counterweight can be made either in the form of a sleeve attached by any known method to the disk disk from its outer side, or it can be a weighted part of the disk 3 itself, or part of its wall.

On the inner part, each disk disk 3 has a surface congruent to the hinged tide 7, forming a tight connection, while there is an annular gap 9 between the indicated congruent surface and the outer surface 4 of each disk disk 9. The parts of the disk 3 that mate with the hinged tide 3 do not exit beyond it at any possible tilt of the disk 3.

Each gas exhaust pipe 3 is made up of two parts (the upper rotary and lower stationary relative to the disk 3 to which it is attached) with the possibility of bending them relative to each other and with the possibility of rotating the upper part of the tube from a vertical position when the upstream disk disk 3 comes in contact downstream tube 5 on the inclined section of the well and back when the section again becomes vertical. The specified connection between the upper and lower parts of the tube can be made in any known manner, for example, in the form of an elastic insert, a spherical joint, a rotary coupling, etc.

The connection of the lower part of each gas exhaust pipe 5 to the disk disk 3 is made using a spherical hinge 10, with the possibility of turning the pipe 5 from a vertical position when the upstream disk disk 3 contacts the downstream pipe 5 on the inclined section of the well and back when the section again becomes vertical .

In each upper part of the tube 5, a valve 11 is installed on top of it with the possibility of a gas-liquid mixture from the tube 5 above it, which does not allow liquid to flow down the inner cavity of the tube.

According to the first embodiment, each disk disk 3 is made of two halves connected longitudinally by any known method, in order to mount the disk disk to the hinge 7 of the suction pipe 1. According to the second embodiment, each disk disk 3 is made of solid (non-separable) from elastic material, with the possibility of elastic deformation to install the disk 3 on the hinge 7 of the suction pipe 1. Such an elastic material can be, for example, fluoroplastic, rubber, synthetic Natural or natural rubber, other polymers suitable for downhole conditions.

A multi-section gas separator plate type for directional wells works as follows.

When lowering the pump (of any type - sucker rod, electric submersible, screw, etc.) with a multi-section gas separator into the well, having a deviation from the vertical, each disk disk 3 under the action of the counterweight 8 changes its position relative to the axis of the suction pipe 1, with the location of the upper surface 4 disk 3, close to horizontal. The gas-liquid mixture enters under the disks 3 and is separated due to gravitational forces. The liquid accumulated above each disk 3 enters through the annular gap 9 and the radial channels 2 into the axial channel 6 of the suction pipe 1. The separated gas enters under the disk disks 3 and is fed under the overlying disks 3 through the tubes 5, while the gas leaving the tubes 5 moves above the surface 4 of the liquid accumulated on the disk 3 in the gap 9 to the location of the tube 5 on the overlying disk 3, i.e. the gas moves, as it were, in a spiral channel, in contact with the liquid, which contributes to a better separation of gas from the liquid. In this case, the entry of the separated gas into the suction pipe 1 is excluded. Since the disk plates 3 are oriented in a plane close to the horizontal, their holding ability remains high and does not depend on the angle of inclination of the well at the installation site of the gas separator, unlike the prototype.

The liquid under the disk 3 will flow down along the suction pipe 1 itself (in this case, the drainage along the inner cavity of the tube 5 is eliminated) and then through the annular gap 9 into the radial channels 2 of the suction pipe 1 located directly above the hinge 7 adjacent to it. The disk disk 3 does not have an internal counterweight in the form of a sleeve, and also has a composite bending tube 5 for venting gas, which can freely contact the inside of the disk during tilting, eliminating the entry of the separated liquid under the disk into the internal channel of the tube 5, so the inclination of the disk can be increased in directional wells in areas with a large angle of inclination. The circumferential articulated tides 7 will not wedge the disk disks 3 mounted on them, the balances 8 on the outer part of the disk disks will contribute to the high sensitivity of the disks from the inclination of the well, since the shoulder from the hinge to the counterweight will increase.

Thus, the use of the proposed separator increases the separation ability when working in the wellbore of a directional well.

Claims (2)

1. A multi-section disk-type gas separator for directional wells, comprising a series of inverted disk disks sequentially placed one below the other, concentrically mounted on a suction pipe with radial channels, gas exhaust pipes, each of which is placed on the outer surface of the disk disk parallel to the suction pipe moreover, the disk disks are pivotally mounted on the suction pipe, with each vertical axis of the tube of the overlying disk disk last thoroughly shifted relative to each vertical axis of the tube of the underlying disk disk with the possibility of forming a spiral channel by the tubes, characterized in that the suction pipe for hinged movement of each disk disk contains circular articulated tides, the radial channels of the suction pipe are located directly above each of the circular articulated tides adjacent to it , disk disks have counterweights on the outer part, and a surface congruent with articulated tack on the inner part to you, while there is an annular gap between the indicated congruent surface and the outer surface of each disk disk, each disk disk made of two longitudinally connected halves, and each tube made of two parts with the possibility of bending them relative to each other and with the possibility of rotation of the upper part the tubes from a vertical position and back when the upstream disk disk contacts the downstream tube in an inclined section of the well, with each upper part and a valve is installed on top of the tube with the possibility of a gas-liquid mixture from the tube above it, preventing liquid from flowing down the inner cavity of the tube. 2. A multi-section disk-type gas separator for directional wells, comprising a series of inverted disk disks sequentially placed one below the other, concentrically mounted on the suction nozzle with radial channels, gas exhaust pipes, each of which is placed on the outer surface of the disk-shaped disk parallel to the suction nozzle moreover, the disk disks are pivotally mounted on the suction pipe, with each vertical axis of the tube of the overlying disk disk last thoroughly shifted relative to each vertical axis of the tube of the underlying disk disk with the possibility of forming a spiral channel by the tubes, characterized in that the suction pipe for hinged movement of each disk disk contains circular articulated tides, the radial channels of the suction pipe are located directly above each of the circular articulated tides adjacent to it , disk disks have counterweights on the outer part, and a surface congruent with articulated tack on the inner part you, while between the specified congruent surface and the outer surface of each disk plate there is an annular gap, and each disk disk is made of one piece of elastic material with the possibility of elastic deformation to install the disk disk on the hinged tide of the suction pipe, with each tube made up of two parts with the possibility of their bending relative to each other and with the possibility of rotation of the upper part of the tube from a vertical position and back when contacting th poppet disc underlying tube on the inclined wellbore section, the top of each tube on top of it, with a valve Incoming gas-liquid mixture from the tube above it without allowing fluid to flow down along the inner cavity of the tube down.

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