Downhole device for annular gas bypassing

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas producing industry and can be used for annular gas bypassing to the flow string in wells operated by sucker-rod pump units. Task of the invention is to perfect design of the downhole device for annular gas bypassing in order to improve operational efficiency of the well sucker-rod pumping equipment notwithstanding temperature conditions of the well operation and pressure of annular gas. The device is placed in the well annular space over the well fluid level in the flow string collar. The device comprises a return valve and a radial hydraulic channel. In the collar lower part there is a radial hydraulic channel interconnected to the well annular space at the one side through the return valve and to the flow string cavity at the other side through a jet device. At that axes of the radial hydraulic channel and the jet device are crossed in the nozzle area of the latter. Besides the device comprises a flow string with a whipstock for gas-fluid flow in it. The whipstock is made as a bushing capable to be fixed in the flow string collar. Length of the whipstock for gas-fluid flow is less than distance between receipt and discharge of the jet device. Axes of the radial hydraulic channel and the jet device are perpendicular. Fixation of the whipstock for gas-liquid flow in the flow string collar may be implemented by equipping the flow string collar with an inner groove and the whipstock for gas-liquid flow with a ring holder.

EFFECT: usage of device allows reducing pressure of annular gas notwithstanding temperature and pressure conditions thus increasing life between overhauls for the sucker-rod pumping equipment; besides, this device allows reducing pump-setting depth for the sucker-rod pump due to increase of fluid level over the pump thus reducing consumption of the flow string and pump rods and increasing life between overhauls for the units.

3 dwg

 

The invention relates to the oil and gas industry and can be applied to the annular bypass gas into the column of pump-compressor pipes (tubing) in wells operated by sucker rod installations of pumps.

The known method of disposal of gas from annular space [RF Patent №2079636, E21B 43/00, publ. 20.05.1997.], which provides the location of the check valve in the annulus, but the method has limitations in application, because you can use it only on wells operated by electric submersible pumps.

The closest to the proposed invention is an automatic valve device consisting of a check valve and a device for controlling its operation, made in the form of the piston and the housing. The piston is connected with the discharge line by means of two concentrically mounted underneath bellows and pusher. In the walls of the housing has a wedge-shaped pushers with springs. A check valve connected to the discharge line through a hydraulic channel [Ed. SVID. The USSR №625021, E21B 33/03, publ. 25.09.1978].

The design of the prototype device does not function in low temperatures due to freezing of the check valve located on the discharge line, as well as freezing corrugated tubes, which causes them to rupture and hard�of tightness of the device to control the operation of the check valve. The design of the automatic valve device as a whole is complex and unwieldy.

The object of the invention is improving the design of downhole devices for annular bypass gas in order to improve the efficiency of sucker-rod pumping equipment, wells, regardless of temperature conditions of the well and the annular pressure gas.

The problem is solved proposed downhole device for annular bypass gas.

Downhole device for annular bypass gas contains a check valve and radial hydraulic channel, the device is disposed in the annulus of the well above the level of the well fluid in the coupling of the column of tubing in the bottom of the sleeve is a radial hydraulic channel connected on one side with the annular space of the well through a check valve, and on the other hand - with the cavity of the tubing through the jet device, wherein the axis of radial hydraulic channel and the jet device intersect in the area of the nozzle; in addition, the device contains a column of sucker rods placed on her diverter gas-liquid flow, made in the form of a sleeve and can be locked in the coupling of the tubing string, the length of the diverter gas-liquid�of flow is less than the distance between the reception and discharge of the jet device. The axis of the radial hydraulic channel and perpendicular to the jet device.

The option of fixing the diverter gas-liquid flow in the coupling tubing may be implemented, for example, by equipping tubing couplings internal groove, and a diverter gas-liquid flow ring holder.

Layout of the downhole device for annular bypass gas is shown in Fig.1.

Design of downhole devices for annular bypass gas is shown in Fig.2 (cross section a-A and b-B) and 3 (cross sections b-b and B-C).

Check valve 1 (Fig.3) and the associated radial hydraulic channel 2 (Fig.3, In-In) located at the bottom of the clutch 3 (Fig.2) tubing 4 connects the annulus formed by the inner wall of the production casing 5 (Fig.1) and the outer wall of the tubing 4 (Fig.2), with the cavity of the tubing string 4 through the jet device 6. The axis of the radial hydraulic channel 2 (Fig.3, In-In) and the jet device 6 (Fig.2) perpendicular to and intersect in the area of the nozzle jet device 7 6.

Still fixed annular holder 8 in the groove 9 of the coupling 3, the diverter gas-liquid stream 10 (Fig.3) made in the form of bushings and pre-temporarily fixed (for example, adhesive slidably on the column of sucker rods 11, allows bespredelstve�but to make reciprocating motion of the column of sucker rods 11 and is intended for sealing the inner space of the column tubing 4 (Fig.2) and changing the direction of liquid flow from the tubing string 4 in the nozzle 7 jet device 6. The length of the diverter gas-liquid stream 10 (Fig.3) is less than the distance between the input 12 (Fig.2) and the discharge 13 of the jet device 6.

Downhole device for annular bypass gas is located in the coupling tubing 3 4, intended for transportation of the reservoir fluid, sucker rod pumped by pump 14 (Fig.1).

Downhole device for annular bypass gas operates as follows.

In the process of descent of the sucker rod pump 14 (Fig.1) the gas-liquid flow diverter 10 (Fig.3) glue fixed on the column of sucker rods 11. In operation, pump 14 (Fig.1) during movement of the sucker rods 11 (Fig.3) up the annular holder 8 (Fig.2) a diverter gas-liquid stream 10 (Fig.3) is secured in an internal groove 9 (Fig.2) couplings 3, resulting in adhesive bonding is destroyed. By changing the direction of flow of gas-liquid mixture (SHC) flow diverter 10 (Fig.3), X enters into the nozzle 7 (Fig.2) the jet device 6, i.e., in an area of low pressure, where the radial hydraulic channel 2 (Fig.3, In-In) through a check valve 1 gas enters annular space in which the pressure is increased. Mingling, annular gas and GLM through the discharge 13 (Fig.2) the jet device 6 into the cavity of the tubing string 4 above the flow diverter 10 (Fig.3). GLM on Kolo�not tubing 4 (Fig.2) is supplied to the wellhead and further in flow line equipment, moreover, the gas in the composition of this mixture does work on its recovery, which reduces the load on the crown of the walking beam of the pumping unit, thereby increasing the overhaul life of the unit. Thus there is a reduction of gas pressure in the annulus.

During the course of the sucker rods 11 (Fig.3) down in the proposed device happen to absolutely similar processes as in the up. Because, during the course of the sucker rod 11 down, pumped GLM also flows through the column tubing 4 (Fig.2) at the wellhead due to displacement of the liquid immersion part of the sucker rods 11 (Fig.3) how and when the rod up when the SHC is displaced sucker rod pump 14 (Fig.1).

The use of downhole devices to bypass annular gas allows lower pressure annular gas regardless of temperature conditions and the size of the annular pressure of the gas, allowing it to increase the overhaul period of operation of sucker-rod pumping equipment by raising the liquid level above the sucker rod pump and due to the lack of formation of hydrate plugs in the annulus.

The use of downhole devices to bypass annular gas will reduce the depth of the suspension rod of the pump by raising the liquid level above the sucker rod pump and thereby reduce the consumption of N�T, sucker rods and increase the time between repairs installations.

Technical and economic efficiency of the downhole device for annular bypass gas is to increase the efficiency of operation of wells operated by sucker rod installations of pumps, increasing the yield of wells.

Downhole device for annular bypass gas, located in the column tubing - tubing with coupling and containing a check valve and radial hydraulic channel, characterized in that the radial hydraulic channel located in the lower part of the coupling and is connected on one side with the annular space of the well through a check valve, and on the other hand - with the cavity of the tubing through the jet device, wherein the axis of radial hydraulic channel and the jet device intersect in the area of the nozzle of the latter, in addition, the device comprises a gas-liquid flow diverter, made in the form of the sleeve can be locked in the coupling of the tubing string, and the length of the flow diverter is less than the distance between the reception and discharge of the jet device, wherein coupling the tubing has an internal groove, and a diverter gas-liquid flow - annular holder, wherein the axis of radial hydraulic channel and perpendicular to the jet device.



 

Same patents:

FIELD: oil-and-gas industry.

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1 ex

FIELD: oil and gas industry.

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1 ex, 1 dwg

FIELD: oil-and-gas industry.

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2 cl, 3 dwg

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17 cl, 11 dwg

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6 cl, 5 dwg

FIELD: oil and gas industry.

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3 ex, 6 dwg

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3 cl, 2 dwg

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3 dwg

FIELD: oil-and-gas industry.

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Well testing device // 2545234

FIELD: oil and gas industry.

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10 cl, 5 dwg

FIELD: oil and gas industry.

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2 cl, 3 dwg

FIELD: machine building.

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6 cl, 3 dwg

FIELD: oil and gas industry.

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2 dwg

FIELD: oil and gas industry.

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11 cl, 49 dwg

FIELD: mining.

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EFFECT: improvement of efficiency of a bottom-hole tool activation system.

26 cl, 13 dwg

FIELD: oil-and-gas industry.

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EFFECT: decreased and controlled hydraulic pressure, ease of logging instrument arrangement, combination of several jobs in one lowering of tubing.

1 dwg

Cut-off valve // 2533394

FIELD: oil and gas industry.

SUBSTANCE: cut-off valve is installed in the tubing string over the hydraulic device and consists of a split casing with a hollow plunger is installed in its axial channel with a collar supported by a spring. In the axial channel of the hollow plunger there is a thrust with a bushing installed on it; the bushing has radial openings alternated with axial openings connecting cavity under the hollow plunger over the saddle. In the axial channel there is a bushing with a hollow tube equipped with a disc valve at the end pressed to the saddle by the spring. Between the hollow plunger and the split casing there is a circular chamber coupled hydraulically by a radial opening to the axial channel of the bushing and hollow tube. In the bushing there is a bottom with the central axial channel where a bypass valve is installed with a retainer covering bypass openings in the bottom in initial position and its stroke is limited from bellow by a locking ring.

EFFECT: sealing of the tubing string axial channel from the well cavity at any depth of the well and impact of hydrostatic pressure to the disc valve, filling of the tubing string axial channel by formation fluid at the device running in to the well, opening of the disc valve at excess pressure generation in the axial channel of the tubing string with free passage of hydraulic fluid to the device placed below.

2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention can be used for pulse injection of fluid into bed. Proposed device comprises case, concentric pipe with central channel arranged therein, openings, nuts and spring. Said nut is fitted on pipe outer surface at its top while spring if arranged between nut and case with inner cylindrical recess. Radial channel are made in lower part of the case cylindrical recess. Note here that hollow cylindrical valve equipped with circular ledge is fitted rigidly to the pipe fitted in the case to perform limited sealed displacement downward relative to inner cylindrical recess of the case. Case cylindrical recess above cylindrical valve circular ledge communicates via openings with central channel while inner cylindrical recess cavity above said ledge communicates via radial channels with the space outside the case. Besides, it has replaceable bush and stiff centring skid with stripping valve arranged atop said pipe. In compliance with this invention, hollow cylindrical valve below the case cylindrical recess is equipped with radial openings. Radial holes tightly stopped from inside by replaceable bush are arranged below radial openings in hollow cylindrical valve. From top, said replaceable bush is connected with the case by rod fitted in radial holes of said valve. Note here that hollow cylindrical valve is plugged from bottom while said case can perform restricted axial reciprocation along with replaceable bush relative to said valve at forcing the fluid in this device.

EFFECT: higher fluid flow rate at pulsed injection.

1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: valve has body of steel, throttling assembly, locking assembly with ball and saddle for it. Between locking and throttling assemblies resilient impenetrable wall separating these is mounted fixedly with possible interconnection via U-shaped, turned by its knee upwards, tubular channel, with inner diameter greater than ball diameter, having two branches directed downwards and having various lengths. Elongated pipe branch is connected through open end fixedly placed on wall to hollow of body throttling assembly. Short branch end is placed above wall and is within hollow of locking assembly. Short branch pipe is extended above the knee for distance greater than ball diameter. It is made in form of branch pipe with closed upper end, forming a hollow - tank with stopping device for placement and holding of ball therein in starting position. Ball can possibly fall freely under its own wait in downward direction onto saddle if released by stop as a result of effect from outside force from cementing plug at the end of cementation.

EFFECT: higher reliability, better quality.

7 cl, 8 dwg

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