The method of injection of the stimulant in the borehole and downhole injector for its implementation

 

The invention relates to the oil industry and can be used in the production of heavy oil using low-viscosity solution to reduce friction on the surface of the production string. The technical result - the reduction of the viscosity of high-viscosity oil. The method includes periodically dosed injection of stimulant in the space filled with oil, by moving the plunger injection unit agent injection. The stimulator is served to the dosing volume of the annular space of the borehole injector and Inuktitut inside the cavity or to the dosing volume of the cavity of the downhole injector and Inuktitut in its annulus. The downhole injector includes a housing with injection unit in the form of a volumetric pump, the input or the output of which is connected with the annular space of the housing, respectively, an output or an input of which is connected with the cavity of the housing. The plunger volumetric pump allows periodic mechanical contact with multiple pathogens injection, which allow for the fixation rod sucker rod pump. 2 N. and 5 C.p. f-crystals, 4 Il.

The invention relates to industrial oil is Ascoli.

Known method of injection of the stimulant in the hole (p. UA NO. A, E 21 IN 43/12) contains a supply of stimulant, such as low-viscosity liquids, injects holes near the pump, increasing the pressure of the stimulator and the creation of a wave density stimulator when moving pathogen injection with a barbell up together with the rise of oil. Dose injection stimulator set by selection of the respective diameters of the outlet openings for the stimulator, and by discharge from the external system. Injection of the stimulant in the space bounded by the casing and filled with a moving stream of oil, carried out synchronously radial flow stimulator.

Coincide with the essential features of the method that is claimed, the filing of the stimulator to the downhole injector, periodic movement of the activator injection and dosed injection of stimulant in the space filled with oil.

When using the known method, the injection of the stimulant in the well stimulator is not enough crosses the flow of high-viscosity oil, resulting in insufficient decreases its viscosity.

Known method of injection of the stimulant in the hole (p. RU # 2088749, E 21 IN 43/00), we selected the e pressure stimulator when moving pathogen injection with a barbell up together with the rise of oil, mixing a stimulant with oil when creating a wave density stimulator. Dose injection stimulator set by selection of the respective diameters of the outlet openings for the stimulator. Injection of the stimulant in the space bounded by the casing and filled with a moving stream of oil, carried out simultaneously in two threads stimulator, one of which serves radially on the inner surface of the casing, the other tangentially to the outer surface of a pump of compressori pipes. These threads stimulator, alternatively, may be spaced along the height of the well.

Coincide with the essential features of the method that is claimed, the filing of the stimulator to the downhole injector with the injection unit, the periodic movement of the activator injection and dosed injection of stimulant in the space filled with oil.

When using the known method of injection of the stimulant in the well stimulator is not enough crosses the flow of high-viscosity oil, resulting in insufficient decreases its viscosity.

The task is improving the way the injection of the stimulant in the well, in which by changing process parameters obespechenie its viscosity.

Known downhole plunger injector (p. UA NO. A, E 21 IN 43/12) contains the body of the pipe with injection holes arranged radially. Inside is a bar, which is made with the ability to connect to a rod column, and the causative agent injection in the form of a ring-shaped mixer-pathogen, located under the injection hole, which is arranged to move along the body and rigidly connected to the middle part of the bar.

Coincide with the essential features of the downhole injector, which claimed the body of the pipe with injection holes, the causative agent injection, made in the form of an annular element, which is designed to lock the rod sucker rod pump, the ends of the case is made with possibility of connection to tubing.

When using a known downhole injector stimulator is not enough crosses the flow of high-viscosity oil, resulting in insufficient decreases its viscosity.

Known downhole injector (p. RU # 2088749, E 21 IN 43/00), chosen for the prototype, contains the body of the pipe with injection units. In the first of them, like the centralizer made radio hole which is connected to the annular space of the housing. The second injection unit is located above the first group of outlet openings of the channels of this unit is up-directed tangentially relative to the surface of the housing, and the connection of internal and external spaces of the case is made similarly as in the first block. Inside is the causative agent injection in the form of a ring-shaped mixing of the pathogen, which is designed to lock the rod sucker rod pump, the ends of the case is made with possibility of connection to tubing.

Coincide with the essential features of the downhole injector that is claimed, the body of the pipe with the injection unit, the first group of holes which is connected with the annular space of the housing, the second group of holes which is connected to the cavity of the body, the causative agent injection in the form of an annular element, which is designed to lock the rod sucker rod pump, the ends of the case is made with possibility of connection to tubing.

When using a known downhole injector stimulator is not enough crosses the flow of high-viscosity oil, resulting in insufficient decreases its viscosity.

the indication of more intense intersection stimulator post high-viscosity oil and thereby largely reducing its viscosity.

In the method of injection of the stimulant in the borehole, which involves feeding stimulant to the downhole injector with the injection unit, the periodic movement of the activator injection and dosed injection of stimulant in the space filled with oil, according to the invention, the stimulator is metered through periodic filling of the metering volume of the injection unit and Inuktitut when moving plunger injection unit agent injection.

In addition, the stimulator is served to the dosing volume of the annular space of the borehole injector and Inuktitut inside its cavity.

In addition, the stimulator is served to the dosing volume of the cavity of the downhole injector and Inuktitut it in the annulus.

In the downhole injector, which contains the body of the pipe with the injection unit, the first group of holes which are connected with the annular space of the housing, the second group of holes which are connected with the cavity of the housing, the causative agent injection, vypolnennyi in the form of an annular element, which is designed to lock the rod sucker rod pump, the ends of the case is made with connection tubing, according to from the d volumetric pump, the second group of holes are made, respectively, as an output or an input of a volumetric pump, a volumetric pump plunger connected to the lever element, which is installed with the possibility of contact with the causative agent injection.

In addition, the lever element contains a spring-loaded hinge element, which is arranged to move in the cavity of the body.

In addition, the downhole injector includes several annular pathogens injection, which is made to lock the rod sucker rod pump in the boundaries of the site, which is equal to the length of stroke of the rod.

In addition, the causative agent injection contains pivotally linked item, which is made with the possibility of one-sided in the direction of movement of the pathogen injection of contact with the lever element.

The above features of the process, which is claimed, provides periodic injection of stimulant during extraction of oil and/or lifting, which allows effective you are to reduce the viscosity of high-viscosity oil.

The above characteristics of the downhole injector, which is claimed, provides the possibility of establishing it in the column tubing, reliable communication with Stango is vnee to reduce the viscosity of high-viscosity oil.

In Fig.1 shows schematically the downhole injector that implements the proposed method, Fig.2 is a view of And from the middle of the enclosure of Fig.1; Fig.3 - element pathogen injection articulated element, in the context of Fig.4 - type B swivel of Fig.3.

The downhole injector includes a housing 1 of the pipe with the joint elements 2 with tubing and injection unit 3, made in the form of a volumetric pump with two dosing volume 4, each of which on one side is limited by the plunger 5. Dosing volume 4 connected to the first group of holes formed as inlet valves 6, with the annular space of the borehole injector, and the second group of holes formed as the output valves 7, the internal cavity. Between the top of the plunger 5 and the cover 8, the bottom of the plunger 5 and the bottom of the block 3 are spring 9. The average length of the plunger 5 is connected to the lever element 10, which is connected with the hinge element 11 located in a vertical groove 12 of the housing 1 and connected with the roller 13, which stands for groove 12 in the cavity of the housing 1. Vertical groove 12 includes an extension 14 at the top and bottom parts, near which the inner surface of the housing 1 gently descends to its outer p is 15, when it is placed beyond the boundaries of the inner diameter of the housing 1. This hinge element 11 through the connection with the lever element and the plunger 5 are biased by springs 9 at the extremes of its travel. Listopadova spring 16 to retain the balls of the valves 6 and 7. The annular pathogens injection 17 are made with holes for the passage of fluid and fixed on the rod 18 a sucker rod pump. Case 1, the injection unit 3 and the cover 8 are connected by welding.

The downhole injector are presented in option for feeding stimulant to the dosing volume of the annular space of the borehole injector and injection inside its cavity.

Option downhole injector, when the valve 6 is designed as a weekend and the valve 7 is designed as an input, made for feeding stimulant to the dosing volume of the cavity of the downhole injector and injected into the annulus. Reverse the location of the valves are not shown.

Pathogens injection 17 (Fig.3-4), alternatively, contain on the perimeter connected through the terminals 19 of the contact elements 20, which are held in a horizontal position with the ledge 21 and is arranged to move up.

The proposed method of injection of the stimulant in Injectionem unit 3 and the cover 8, is set at the selected depth in equipment for oil sucker-rod pump, connecting elements 2 with the tubing. The annular pathogens injection 17 is fixed on the rod 18. Zapatenovannuyu below the level of the establishment of the downhole injector cavity between the casing colonoy that the figure does not prakasana, and tubing fill stimulator. During the movement of the rod 18 from the bottom up first as the causative agent injection 17 comes into contact with the roller 13, which together with the hinge element 11, the lever element 10 and the plunger 15 starts to move together with the rod 18. In the field of extension 14 of the groove 12 and the roller 13 occupies the position 15, skipping the first agent injection 17 up. When the plunger 5 clicks in its extreme position on the spring 9, which podruzamevaet hinge element 11 and after the passage of the first exciter injection 17 returns the plunger 5 back on the distance at which the roller 13 occupies a position in which it protrudes from the groove 12. The second agent injection 17 comes into contact with the roller 13 is identical to the first. The main dose of stimulant takes place after the push of the spring 16 through the outlet valve 7 when the movement of the plunger 5, the first agent injection 17, and additional smaller dose when moving the plunger 5 rastvoritele through the inlet valve 6, at the same time through the bottom outlet valve 7 is new injection.

When using variant annular exciter injection 17 with the contact elements 20, which are held in a horizontal position with the ledge 21, the movement of the rod 18 upward causes the injection is similar to that presented above. During the movement of the rod 18 from top to bottom of the contact elements 20 in contact with the roller 13 rotate around the rod 19 and do not cause longitudinal movement of the hinge element 11. Thus carry out one-sided in the direction of motion of the mechanical contact of pathogens injection 17 injection unit 3. In a similar performance injection is carried out only during the downward movement.

Valve version 6 weekends and valve 7 input gives you the ability to inject a stimulant of the cavity of the housing 1 in its annulus.

For injection stimulator using a variant of the downhole injector, in which the valve 6 is designed as a weekend and the valve 7 is input, the stimulator fill tubing. All subsequent operations are performed similarly indicated above. This stimulator is served to the dosing volume of the cavity of the downhole injector is rubai complicated by the need to use powerful equipment and a significant amount of energy. To reduce the friction of the heavy oil from the surface of the tubing downhole injector set, for example, 0.5 depth above which the viscosity of the oil increases significantly. Injection of stimulant, such as low-viscosity oil, in the amount of 15-25% by volume of extracted oil helps to create a wall moving layer in the tubing and reduce power consumption by 5-10%, and increase the turnaround time of operation of the equipment. The establishment of two downhole injector gives a positive effect in 8-15% of the production.

Thus, an effective reduction of oil viscosity when using the proposed method of injection of the stimulant in the borehole and downhole injector for its implementation improves the efficiency of its production.

Claims

1. The method of injection of the stimulant in the borehole, which involves feeding stimulant to the downhole injector with the injection unit, the periodic movement of the activator injection and dosed injection of stimulant in the space filled with oil, wherein the stimulator is metered by periodically filling the metering on the.

2. The method according to p. 1, wherein the stimulator is served to the dosing volume of the annular space of the borehole injector and Inuktitut inside its cavity.

3. The method according to p. 1, wherein the stimulator is served to the dosing volume of the cavity of the downhole injector and Inuktitut it in the annulus.

4. The downhole injector, which contains the body of the pipe with the injection unit, the first group of holes which are connected with the annular space of the housing, the second group of holes which are connected with the cavity of the housing, the causative agent injection, made in the form of an annular element, which is designed to lock the rod sucker rod pump, the ends of the case is made with connection tubing, wherein the injection unit is made as a volumetric pump, the first group of holes is made as an input or output volume of the pump, the second group of holes are made respectively as output or input volumetric pump, the plunger volumetric pump is connected to the lever element, which is installed with the possibility of contact with the causative agent injection.

5. The downhole injector for p. 4, characterized in that the lever e is pus.

6. The downhole injector under item 4 or 5, characterized in that it contains several annular pathogens injection, which is made to lock the rod sucker rod pump in the boundaries of the site, which is equal to the length of stroke of the rod.

7. The downhole injector according to any one of paragraphs.5 and 6, characterized in that the causative agent injection contains pivotally linked item, which is made with the possibility of one-sided in the direction of movement of the pathogen injection of contact with the lever element.

 

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