RU25759U1 - SECTIONAL HYDROABRASIVE PERFORATOR - Google Patents

Description

hoisting operation to ensure the opening of large intervals of reservoir power, the opening interval for one hoisting operation does not exceed 1-2 meters. The design of the known ball valve in this waterjet perforator does not allow changing its weight depending on the density of the fluid in the well and reservoir pressure, which entails high costs for the selection of the corresponding material and additional costs for removing the ball valve in wells with low flow rate and low reservoir pressure .

In addition, the known design of a waterjet perforator does not allow the production of vertical slots in the production casing and formation rock, which does not provide the necessary area for fluid filtration. The cylindrical shape of the outlet cross section of the nozzle during inversion forms a jet that does not sufficiently effectively affect the hard surface of the column and formation rock, opening the formation has a fairly long time and a small filtration area (area of different rocks), the depth of opening of the formation is insufficient.

The technical task of the proposed utility model is to expand the technological capabilities of a waterjet perforator.

The stated technical problem is solved due to the fact that in a waterjet perforator containing a hollow body, guiding jet nozzles, a ball valve and a shank, the hollow body is made sectional, the sections of which are interconnected by an adapter with a sealing seal, the upper section consists of internal and external columns, the inner column is made with symmetrically located holes in its upper part, between which a coupling with a sealing seal and a seat is fixed using shear screws edlom under additional ball valve and slidably vertically inside the column, to the top section is mounted by means of sub unit vertical movement hydroperforators sectioned in its lower part, the upper section is provided with a stop in the form of stop ring diameter.

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corresponding to the diameter of the coupling, a shank with a seating seat under the main ball valve is located in the lower section of the housing, while the diameter of the main ball valve is smaller than the inner diameter of the coupling and corresponds to the seating seat in the shank, and the diameter of the additional ball valve is larger than the inner diameter of the coupling and corresponds to the coupling seating seat, the jet nozzles are made with an outlet cross section in the form of a triangle, are arranged helically in the height of the body and each of them is directed at an acute angle to the horizontal oh housing axis, ball valves are made hollow to vary their weight and internal pressure. The angle of inclination of the nozzles to the horizontal axis of the housing is 10 ° - 45 °. Ball valves are detachable or provided with an opening for filling with metal granules and a thermally expanding substance. Depending on the thickness of the formation, the body of the hydroabrasive punch has several sections similar to the upper section, while the diameter of the additional ball valve is smaller than the inner diameter of each upper section and corresponds to the landing seat of the last of the upper sections of the body. When the angle of inclination is less than 10 °, the depth of the cut-through slit of the channel increases, but the clogging substances are poorly removed. At an inclination angle of more than 45 °, the depth of development of the productive formation sharply decreases. The execution of jet nozzles located in the housing in a spiral one relative to the other and directed upward at an angle of 10 ° - 45 ° to the horizontal axis of the housing provides cutting of inclined slots-channels, perefilnyh large height of the formation or several thin layers, which activates (reveals) a large thickness of the reservoir . In addition, the inclined arrangement of the channel slots allows particles, usually colmatizing (clogging) of the horizontal channel slots, to drain, slide along an inclined channel to the holes in the wellbore, and carry products to the surface. The implementation of ball valves with the ability to change their weight for wells with different reservoir pressures by loading inside, for example, lead granules and increase the compressive strength by introducing inside

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a component that expands at high temperatures, such as alcohol, gas, and others, increases valve safety at high reservoir pressures. The execution of ball valves with hollow, detachable, and variable in weight depending on the depth allows them to be removed to the surface even with a small debit of the reservoir being opened and prevents the costs of its extraction by special pumping of the liquid under high pressure through the annulus or to raise the pipe string.

The presence of a node for vertical movement of a waterjet perforator allows the formation of slits up to 200 mm or more in the casing, depending on the task, the elasticity of the spring material included in the device of the node for vertical movement and the magnitude of the change in working pressure. The output section of the nozzles in the form of a triangle has advantages over the cylindrical one in that when inverted, the jet rotating around its axis takes the shape of an inverted triangular star, and such an section of the abrasive jet affects the hard surface of the column and formation rock more effectively, reducing it by a factor of 1.5 - 2 time of their opening. With the same sectional area as the cylindrical conditional area, it has 2 times or more larger filtration area (area of different rocks). The depth of penetration increases by 1.2 - 1.5 times.

In Fig 1 shows the inventive device in the context in the first cycle of waterjet processing.

Figure 2 shows the inventive device in the context of the second cycle of waterjet processing.

In FIG. 3 shows a jet nozzle in section.

Sectional waterjet perforator contains a hollow body consisting of an upper section 1, a lower section 2 connected by an adapter 3 with a sealing seal 4, the upper section 1 consists of an external column 5 and an internal column 6, the inner column 6 is made with symmetrical

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the holes 7, located in its upper part, between the holes 7 by means of shear screws 8, a clutch 9 is fixed with a sealing seal 10 and a seat seat for an additional ball valve 11 and can slide vertically inside the column 6, the upper section 1 in its lower part is provided with a stop 12 in the form of a stop ring, with a diameter corresponding to the diameter of the coupling 9, the lower section of the housing is equipped with a shank 13 with a seating seat under the main ball valve 14. The diameter of the main ball valve 14 is less than the internal diameter m ft. 9 and corresponds to the seat seat in the shank 13, and the diameter of the additional ball valve 11 is larger than the inner diameter of the sleeve 9 and corresponds to the seat seat in the sleeve 9. The upper section 1 and the lower section 2 have jet nozzles 15 arranged spirally along the entire body and each they are directed at an acute angle of 10 ° -45 ° to the horizontal axis of the housing, the ball valves 11 and 14 are made of hollow detachable or with an opening for filling with metal granules and thermally expanding substance.

To the upper section 1 of the hollow body of the sectional waterjet perforator using an adapter 16, a vertical displacement assembly 17 is mounted, consisting of a housing 18, inside of which the hollow rod 19 with a piston and a seal 20 is vertically movable, springs are located between the nut 21 and the piston of the rod 19 22, the upper part of the housing of the vertical displacement assembly 17 is equipped with a sub 23 for attaching a sectional waterjet perforator to the tubing.

Sectional waterjet punch works as follows:

Waterjet perforator on tubing string

set in the well opposite the interval to be waterjet

hydroabrasive mixture, for example, sand with water (Fig. 1). Moreover, since the sliding sleeve 9 covers the openings 7, the hydroabrasive mixture with a high speed of 180-200 m / s flows out of the jet nozzles 15 of only the lower section 2. When the hydroabrasive mixture is supplied under pressure, the hollow rod 19c with a piston together with a perforator and nozzles 15 begins to move vertically downward, compressing the springs 22. Changing the design pressure at the mouth and using known technology and estimated time, gaps are made in the column, cement stone and rock in the interval opposite the nozzles of the lower section. After the first cycle of waterjet processing, the ball valve I is lowered into the perforator, the diameter of which is larger than the ball valve 14 and the internal diameter of the sliding sleeve 9 (Fig. 2). After the ball valve 11 is inserted into the saddle of the sliding sleeve 9, the pressure is raised to the calculated one (50-100 kg / cm) and the mounting screws are cut 8. After cutting the mounting screws 8, the sliding sleeve 9 together with the ball valve 2 moves down against the stop ring 12. Separation of the internal space of the upper section of the waterjet punch from the bottom is provided by a ball valve 11 and a sealing seal 10. When moving the sliding sleeve 9 downward, openings 7 and the waterjet mixture in the space between columns 1 and 2 of the post flushes ink nozzles 15 in the top section. Then, also changing the pressure at the wellhead and using known technology and estimated time, the formation is opened in front of the upper section of the perforator. After the second cycle of waterjet treatment, the well is thoroughly washed from the products of destruction and abrasive particles. Then, the ball valves 11 and 14 are removed to the surface by backwashing and the well is left to spout. If necessary, opening the thickness of the reservoir is greater than the length of the two sections, one or two sections similar to the top are included in the design of the hydraulic perforator. The diameter of the additional ball valve is less than the inner diameter of each upper section and corresponds to the landing

- 6 - the saddle of the last of the upper sections of the body.

The proposed design of sectional waterjet perforator has a number of advantages over the known. Its design is much simpler and more reliable during operation. Its technological capabilities are expanding: the power of opening the formation is provided 2–5 times more in one single-step lifting operation than with the known structures. Well productivity is being increased 2–3 times. The process of work is accelerated and the costs associated with additional well completion and tripping are reduced.

The economic effect of the use of the proposed design in fields with AVPD will be 1300 - 1350 thousand rubles. for 1 well / treatment.

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Claims (4)

1. Sectional waterjet perforator containing a hollow body, guiding jet nozzles (nozzles), a ball valve and a shank, characterized in that it is equipped with an additional ball valve, the body is made sectional, the sections of which are interconnected by an adapter with a sealing seal, the upper section consists of the inner and outer columns, the inner column is made with symmetrically located holes in its upper part, between which a coupling with a sealing seal and a seat d additional valve with the possibility of sliding vertically inside the column, to the upper section, with the help of a sub, a vertical displacement unit of the section hydraulic perforator is attached, in its lower part the upper section is equipped with a stop in the form of a stop ring with a diameter corresponding to the diameter of the coupling, a shank with a landing seat under the main the ball valve is located in the lower section of the housing, while the diameter of the main ball valve is less than the inner diameter of the coupling and corresponds to the seat seat in the shank, and the diameter of the additional The filling ball valve is larger than the inner diameter of the sleeve and corresponds to the seat seat of the sleeve, the jet nozzles are made with an outlet section in the form of a triangle and are arranged spiralwise along the height of the body and each of them is directed at an acute angle to the horizontal axis of the body, the ball valves are made hollow with the possibility of changing their weight and internal pressure. 2. Waterjet perforator according to claim 1, characterized in that the angle of inclination of the jet nozzles to the horizontal axis of the housing is 10-45 ^o .  3. Waterjet perforator according to claim 1, characterized in that the ball valves are made detachable or provided with holes for filling with metal granules and a thermally expanding substance. 4. Hydroabrasive punch according to claims 1 to 3, characterized in that, depending on the revealed power of the formation, its casing is made with several sections similar to the upper section, while the diameter of the additional ball valve is smaller than the inner diameter of each upper section and corresponds to the landing seat of the last of upper sections of the body.