RU76069U1 - DEVICE FOR SIMULTANEOUSLY SEPARATE OPERATION OF A MULTI-PLASTIC WELL - Google Patents

Abstract

The proposal relates to the oil and gas industry and can be used in the operation of multilayer wells, both for separate production of layers, and for simultaneous.

A device for simultaneous and separate operation of a multilayer well containing a pipe with holes located opposite each of the productive formations, hermetically separated by packers.

Outside the nozzle, opposite each of its openings, there are valves, each of which consists of a body with a side channel, a spring-loaded lower seat, hermetically placed in the body, a guide pin and a ball mounted on the seat, and a throttle rigidly mounted inside the seat.

Throttle valves allow you to control the selection of well fluid from their corresponding reservoirs.

On the outer surface of the saddle, a closed groove is made, consisting of alternating short and long grooves, and the guide pin is rigidly connected to the housing on one side and placed in a closed groove of the saddle on the other hand with the possibility of moving along the path of alternating short and long grooves under the action of hydraulic pressure from above, at the same time, when the guide pin is located in the short groove of the closed groove of the seat, the valve is closed, and when the guide pin is placed in the long groove A closed groove seat valve is open.

The proposed device for simultaneous and separate operation of a multilayer well has a simple design, and the use of a pump located at the wellhead to open and close valves reduces valve control costs, that is, tripping operations of the control mechanism into the well are eliminated involving a repair or geophysical team , the absence of the return of the borehole fluid into the formation during the shutdown period eliminates the mudding of the bottomhole formation zone and does not reduce laniruemy total oil production rate. In addition, the installation of throttles inside the valves allows you to adjust the volume of produced well fluid in the reservoir.

3 ill. for 1 liter

Description

The proposal relates to the oil and gas industry and can be used in the operation of multilayer wells, both for separate production of layers, and for simultaneous.

The known method of simultaneous and separate operation of a multilayer well and a receiving valve for periodically shutting off the flow from the reservoirs (RF patent for the invention No. 2161698, IPC 7 Е21В 43/14; ЕВВ 34/06, published in Bulletin No. 1 of January 10, 2001 ) consisting of a housing that is part of the production casing, a spool with receiving holes and a spring installed under the spool end, with stops made on the ends of the spool, one of which, in the stable position of the valve, enters the groove in the housing with two alternating species depth grooves that determines the state of displacement of spool holes relative to the holes in the housing and the other end of the spool stop switching valve includes a crown Recess grooves with curvilinear in the housing on the other hand, provides the motion of the spool in the axial direction of reversal.

The disadvantages of this device are:

firstly, to transfer the receiving valves from one stable position to another, that is, to open or vice versa to close the receiving valves, a hydraulic pump with a working medium is required, which requires additional costs for implementing this method;

secondly, the opening and closing of the receiving valves occurs when a pressure pulse is applied by a hydraulic pump, which injects the working fluid into the production casing, each receiving valve has an individual element that determines the threshold for its operation and have a certain sequence, the violation of which, for example, with a sharp jump in the pressure pulse may lead to a malfunction in the receiving valves, that is, it will not be clear in which of the stable positions each receiving valve is “open” or “closed”.

The closest in technical essence and the achieved result to the proposed is a device for the simultaneous operation of several productive

formations of one well (author's certificate SU No. 907225, IPC 7 Е21В 43/14; published in Bulletin No. 7 of 02/23/1982), made in the form of regulating valve bushings equipped with passage channels and gripping devices located in the body part elements and controlled from the day surface by means of a control mechanism provided with a reciprocal gripping element, while the gripping elements of the valve sleeves are located above the passage channels, and the control mechanism is made in the form of two radially spring-loaded and kinematically connected to each other floor uvtulok on which the gripping element of the control mechanism is located. The disadvantages of this design are:

- firstly, the complexity of the design of the device associated with a large number of nodes and parts, in particular, the complicated design of the valve sleeves and the control mechanism, and this leads to a rise in the cost of manufacturing the device and its cost in general;

- secondly, for opening and closing valve valve sleeves in the well, it is necessary to carry out tripping operations of the control mechanism, for which it is necessary to attract repair or geophysical teams, and this requires additional costs;

- thirdly, after stopping the operation of the well, produced well fluid that is in the well randomly returns back through the openings of the body to the productive formations, the valve bushings of which are open, while the bottomhole zone of the formations is clogged, which reduces the overall oil production rate;

- fourthly, the process of selecting well fluid is not regulated by the strata.

The technical task of the utility model is to simplify the design of the device and reduce the cost of opening and closing valves, as well as eliminating the return of well fluid into the formation during the shutdown of the well and the controlled selection of well fluid in the formations.

The technical task is solved by a device for simultaneous and separate operation of a multilayer well containing a pipe with holes located opposite each of the productive formations, hermetically separated by packers.

What is new is that outside the nozzle, opposite each of its openings, valves are placed, each of which consists of a body with a side channel, spring-loaded from the bottom of the seat, sealed in the body, a guide pin and a ball mounted on the seat, and a throttle rigidly mounted inside the seat moreover, throttle valves allow you to adjust the selection of well fluid from their corresponding reservoirs, while on the outer surface of the seat is made

closed groove, consisting of alternating short and long grooves, and the guide pin on one side is rigidly connected to the body, and on the other hand is placed in a closed groove of the saddle with the ability to move along the path of alternating short and long grooves under the action of hydraulic pressure from above moreover, when the guide pin is located in the short groove of the closed groove of the seat, the valve is closed, and when the guide pin is placed in the long groove of the closed groove of the saddle, the valve is open.

The figure 1 shows the proposed device for simultaneous and separate operation of a multilayer well.

Figure 2 shows the check valve in the open position.

The figure 3 shows a closed groove made on the outer surface of the saddle in the form of alternating short and long grooves.

A device for simultaneous and separate operation of a multilayer well (in this example, figure 1 shows a well with three productive formations) contains a pipe 1 with holes 2; 2 '; 2 '', made in front of each reservoir 3; 3 '; 3 ''. The pipe 1 may consist of a string of pipes, for example, a string of tubing. Each of the productive formations 3; 3 '; 3 '' in the well 4 is hermetically separated from each other, respectively, by packers 5; 5'; 5''. Outside of the pipe 1 opposite each of its holes 2; 2 '; 2 '', installed, respectively, valve 6; 6 '; 6 ''. Each of the valves 6; 6 '; 6 '', for example, valve 6 (see FIG. 2) consists of a housing 7 with a lateral channel 8, spring-loaded from below by a spring 9 of the seat 10 and a throttle 11 rigidly mounted inside the seat 10, the seat 10 being hermetically sealed by means of sealing elements 12, in the housing 7. Also, the valve 6 consists of a guide pin 13 and a ball 14 mounted on the seat 10. The throttle 11 (see figure 2); eleven'; 11 '' (Fig. 1 is shown conventionally), respectively, valves, 6; 6 '; 6 '' (see figure 1) and allow you to adjust the selection of well fluid separately from each reservoir 3; 3 '; 3 '', respectively, during the operation of the well 4.

On the outer surface of the saddle 10, a closed groove 15 is made (see FIGS. 2 and 3), consisting of alternating short 16 and 17 long grooves (see FIG. 3), and the guide pin 13 is rigidly connected to the housing 7 on one side and, on the other hand, is placed in a closed groove 15 of the saddle 10 with the possibility of moving along the trajectory of alternating short 16 and long 17 grooves by the action of hydraulic pressure from above created in the well and, accordingly, in valves 6; 6 '; 6 '' by means of a pump (for example, the CA-320 pump unit widely used in well repair).

A device for simultaneous-separate operation of a multilayer well works as follows.

A device for simultaneous and separate operation of a multilayer well is mounted in the well 4, as shown in figure 1, each of the valves 6; 6 '; 6 '' is open, that is, the internal space of the well 4 communicates with the productive formations 3; 3 '; 3 ''. For example, the guide pin 13 of the valve 6 is placed in a long groove 17 of the closed groove 15 of the seat 10 (see figure 3), that is, the side channel 8 (see figure 2) of the housing 7 of the valve 6 communicates with the inner space of the pipe 1 and, accordingly, wells 4 (see figure 1).

In addition, to regulate the selection of produced well fluid in the reservoir 3; 3 '; 3 '' in valves 6; 6 '; 6 '' chokes 11 installed; eleven'; 11 '', the passage section of which is selected for a certain flow rate, based on the geological and technical characteristics of the layers 3; 3 '; 3 ''.

Next, a pump 19 of any known construction (for example, an electric centrifugal pump) is lowered into a well 4 on a pipe string 18. Then start the well 4 in operation. In this case, the simultaneous operation of all three layers 3; 3 '; 3 '', i.e., the pump 18 pumps the produced well fluid from the well 4 to the surface. Suppose that during the operation one layer is flooded, for example, productive layer 3, which sharply increases the water cut of the produced well fluid. In order to reduce the water content of the produced well fluid, it becomes necessary to shut off the reservoir 3.

To do this, stop the well 4 and remove from it a string of pipes 18 with a pump 19, while valve 6; 6 '; 6 '' (see FIGS. 1 and 2) due to balls 14 (see FIGS. 1 and 2) and balls 14 '; 14 '' (see figure 1) exclude the back flow of the borehole fluid into the corresponding reservoirs 3; 3 '; 3 '', while there is no mudding of the bottomhole formation zone and the planned total oil production rate does not decrease. Then, the mouth of the well 4 is tied with a pump (not shown in FIGS. 1, 2, 3) and a hydraulic pressure is created in the well 4 (see FIGS. 1 and 2), for example 13.0 MPa, corresponding to its response threshold (spring compression 9 with the possibility of moving the guide pin from the long groove of the closed groove 15 (see Fig. 3) to the short groove 16 of the closed groove 15 of the seat 10 of the valve 6), that is, the closing of the valve 6, while this hydraulic pressure acts through the pipe 2 on the valve 6; 6 '; 6 '', and in particular on valve 6.

As a result, the ball 14 (see figure 2) and the seat 10 of the valve 6 are moved down relative to the housing 7, rigidly connected to the pipe 1, compressing the spring 9, at this moment

the guide pin 13 from the long groove 17 (see FIG. 3) of the closed groove 15 moves into the short groove 16 of the closed groove 15 of the valve seat 6 of the valve 6, while the lateral channel 8 of the valve housing 7 is hermetically sealed by the valve seat 10 and the valve 6 is closed. As a result, the reservoir 3 is disconnected from communication with the internal space of the well 4, and the reservoir 3 '; 3 '' continue to communicate with the interior of the borehole 4.

Then again, into the well 4 (see FIG. 1), on the pipe string 18, a pump 19 of any known design is lowered, for example, a sucker rod pump and the well 4 is continued to operate. If it is necessary to open valve 6 during subsequent operation, the above operations are repeated.

If necessary, close the other valves 6 '; 6 '', the above operations are repeated, but the hydraulic pressure created in well 4 must be greater than the hydraulic pressure equal to 13.0 MPa, and corresponding to the response threshold of valve 6, for example, for valve 6 '- 15.0 MPa, and for the valve 6 '' - 17, MPa.

The proposed device for simultaneous and separate operation of a multilayer well has a simple design, and the use of a pump located at the wellhead to open and close valves reduces valve control costs, that is, tripping operations of the control mechanism into the well are eliminated involving a repair or geophysical team , the absence of the return of the borehole fluid into the formation during the shutdown period eliminates the mudding of the bottomhole formation zone and does not reduce laniruemy total oil production rate. In addition, the installation of throttles inside the valves allows you to adjust the volume of produced well fluid in the reservoir.

Claims (1)

A device for simultaneous and separate operation of a multilayer well containing a nozzle with holes located opposite each of the reservoirs, hermetically separated by packers, characterized in that valves are placed outside the nozzle opposite each of its holes, each of which consists of a body with a side channel spring loaded from the bottom of the seat, sealed in the housing, a guide pin and a ball mounted on the seat, as well as a throttle rigidly mounted inside the seat, m throttle valves allow you to control the selection of well fluid from their corresponding reservoirs, while on the outer surface of the saddle a closed groove is made, consisting of alternating short and long grooves, and the guide pin is rigidly connected to the body on one side and placed on the other side in a closed groove of the saddle with the ability to move along the trajectory of alternating short and long grooves under the action of hydraulic pressure from above, and with the location of the guide the pin is closed in the short groove of the closed groove of the saddle, and when the guide pin is placed in the long groove of the closed groove of the saddle, the valve is open.