RU107821U1 - PACKER DRILLED - Google Patents

Abstract

 A drillable packer containing a landing tool, consisting of at least one cylinder equipped with a baffle from below, and a corresponding piston with a hollow rod communicated by transfer channels with the under-piston space of the corresponding cylinder, and a packer including a hollow cylindrical body, a sealing element with an upper and lower stops and supports for slips made with the possibility of expansion and fixation in the well, the upper and lower pushers, the upper of which interacts with the bottom cylinder, made with the possibility of moving downward relative to the housing with fixing in the lower position, and the lower pusher is rigidly connected to the rod of the lower piston with the ability to disconnect after installing the packer in the well, while the hollow rod of the lower piston is equipped with radial channels made below the overflow and a plug covering the stem cavity, characterized in that the plug is rigidly fixed between the radial and transfer channels of the hollow stem of the lower piston, the hollow rods of the upper pistons are equipped with radial channels made similarly to the radial channels of the lower piston, and the baffle of each cylinder is configured to overlap the corresponding radial channels in the transport position and open them when the pistons are moved to the upper position, while the upper part of the hollow rod of the upper piston is equipped with a protrusion, the upper cylinder is equipped with a locking top a mechanism configured to interact with the protrusion and fixing the pistons in the upper position.

Description

The proposal relates to the oil industry, and in particular to means for protecting production casing from high pressures during repair and insulation works in wells.

The well-known “Drillable packer” (copyright certificate SU No. 1832148, ЕВВ 33/12, published in Bulletin No. 29 of 08/07/1993), containing a hollow cylindrical body with a threaded thread on the outer surface, a sealing element with a top mounted on the body and lower anti-seals and supports, upper and lower slips in the form of annular sectors connected by shear screws with supports, upper and lower pushers with clamps having a threaded thread for cutting the body and a pipe with a shank connected to the lower pusher, between which is located a shear ring, while the packer is equipped with slats, the upper ends of which are rigidly connected to the upper pusher, and the lower ends are made with hooks, while the upper slips are made with radial grooves in which the lower ends of the slats are placed, and have hooks for interaction with the hooks of the slats, and at the ends of the supports facing the anti-seals, radial grooves are made.

The closest in technical essence is “Drillable packer” (patent RU No. 2405912, ЕВВ 33/12, published in bulletin No. 34 of 12/10/2010), containing a landing tool consisting of a cylinder and a piston with a hollow rod, hollow a cylindrical body with a threaded thread on the outer surface, a sealing element mounted on the body with upper and lower stops and conical supports, upper and lower slips in the form of annular sectors made with the possibility of longitudinal movement along the conical surfaces of the supports, upper and lower pushers, ver of which, interacting with the cylinder of the landing tool, is equipped with a retainer having a threaded thread for cutting the body, and a shank, the lower pusher rigidly connected to the shear ring for connection with the piston rod of the landing tool, characterized in that the annular sectors of the upper and lower slips are rigidly interconnected by destructible jumpers, and the lower pusher is rigidly connected to the housing and equipped with a spring clip, and the shank is rigidly connected to the hollow rod, fixing the shear ring and inside and equipped with radial channels below the lower plunger and a bottom sampling plug with shear screws connected to the shank with shear screws and made with the possibility of hermetically entering the lower plunger with the ring sampling interacting with a spring clip, while the bottom of the landing tool cylinder is equipped with a camera with a partition and the hollow rod is equipped externally with a movable sleeve with an annular internal groove fixed by a destructible element located inside the chamber and radial holes holes into which the balls are inserted, and the cavity of the hollow rod is hermetically sealed with a plug with a groove on the surface for fixation under the balls pressed by the sleeve from the outside of the hollow rod, the annular groove of which is made to be combined with the balls after the sleeve interacts with the separation partition of the chamber and moves it downward relative to hollow rod, releasing the plug, which is made with the ability to move down below the radial holes of the shank.

The disadvantages of these packers are the inability to use packers for the injection of plugging and curable compositions due to the crushing of these compositions into the piston spaces of the planting tools and their setting when lifting it from the well, which leads to failure of the planting tool and the inability to use it to install other packers without pre-cleaning it from the plugging composition in special workshops.

The technical task of the proposal is to expand the functionality of the drilled packer due to the ability to work with plugging and curing compositions and due to the ability to flush the planting tool immediately after installing the packer, which significantly saves material resources due to the possibility of using one planting tool for planting several packers.

The technical problem is solved by a drillable packer containing a landing tool, consisting of at least one cylinder equipped with a baffle from below, and a corresponding piston with a hollow rod communicated by transfer channels with the under-piston space of the corresponding cylinder, and a packer including a hollow cylindrical body, a sealing element mounted on the housing with upper and lower stops and supports for slips, made with the possibility of expansion and fixation in the well, upper and lower pushers, the upper of which, interacting with the lower cylinder, is arranged to move downward relative to the housing with fixation in the lower position, and the lower pusher is rigidly connected to the rod of the lower piston with the possibility of disconnecting after installing the packer in the borehole, while the hollow rod of the lower piston is equipped with radial channels made below overflow, and a plug that covers the stem cavity.

New is that the plug is rigidly fixed between the radial and transfer channels of the hollow rod of the lower piston, the hollow rods of the upper pistons are equipped with radial channels made similar to the radial channels of the lower piston, and the baffle of each cylinder is capable of overlapping the corresponding radial channels in the transport position and opening them when moving the pistons to the upper position, while the upper part of the hollow rod of the upper piston is equipped with a protrusion, the upper cylinder is equipped with locks on top mechanism adapted to cooperate with a protrusion and the locking piston in the upper position.

Figure 1 shows the upper part of the packer - landing tool in longitudinal section.

Figure 2 shows the lower part of the packer - drillable packer in longitudinal section.

A drillable packer containing a landing tool 1 (Fig. 1), consisting of at least one cylinder 2, equipped with a baffle 3 below, and a corresponding piston 4 with a hollow rod 5 connected by transfer channels 6 with a sub-piston space 7 of the corresponding cylinder 2, and a packer 8 (Fig.2), made of easily drilled materials and comprising a hollow cylindrical body 9, a claw element 10 mounted on the body 9 with the upper 11 and lower 12 stops and supports 13 and 14 under the slips 15, made with the possibility of expansion and fi casing in the well (not shown in Figs. 1 and 2), the upper 16 (Fig. 2) and the lower 17 pushers, the upper 16 of which, interacting with the lower cylinder 2 'of the landing tool 1, are arranged to move downward relative to the housing 9 s fixing in the lower position by the latches 18 (for example, push-in dies or a snap ring - not shown in Fig. 2), and the lower pusher 17 is rigidly connected to the rod 5 ′ of the lower piston 4 ′ (for example, through a hollow extension 19) with the possibility of disconnection ( for example, using destructible ring 20 or a slice s screws - not shown in Figure 2, which are made by the calculated fracture stress) 8 after setting the packer in the borehole. The hollow rod 5 ′ (FIG. 1) of the lower piston 4 ′ is equipped with radial channels 21 made below the overflow channels 6, and a plug 22 overlapping the rod cavity. The plug 22 is rigidly fixed between the radial 21 and the overflow 6 channels of the hollow rod 5 ′. The hollow rods 5 of the upper pistons 4 are equipped with radial channels 23 made similar to the radial channels 21 of the lower piston 4 ', and the baffle 3 of each cylinder 2 is configured to overlap the corresponding radial channels 21 or 23 in the transport position and open them when the pistons 4' or 4 are moved top position. The upper part 24 of the hollow rod 5 of the upper piston 4 is equipped with a protrusion 25, the upper cylinder 2 is equipped with a locking mechanism 26 (for example, in the form of a spring ring or rings spring-loaded inside — not shown in FIG. 1) configured to interact with the protrusion 25 and fix the pistons 4 and 4 ′ in the upper position relative to the cylinders 2 and 2 ′. As a packer 8 (figure 2), a packer of any design can be used, which allows injection of the reagent into the well space underneath it (see patents RU No. 2405912, 2405911, 2395669, 2296853 and the like). Complex technical connections and sealing elements are not shown in FIGS. 1 and 2.

The packer works as follows.

Drillable packer, consisting of a landing tool 1 (figure 1) and packer 8 (figure 2), on a string of pipes 27 (figure 1) is lowered into the well. To prevent unauthorized operation of the landing tool 1, the cylinder 3 and the piston 4 or 4 'can be fixed in the transport position with shear screws 28 (figure 2). After reaching the installation interval (not shown in FIGS. 1 and 2), overpressure is created in the pipe string 27 (FIG. 1) by pumping from the wellhead with a pump (not shown in FIG.), Which enters the sub-piston space 7 through the transfer channels 6 (FIG. 1) of each cylinder 2 and 2 ′. As a result, when the shear force is exceeded, the screw 28 (Fig. 2) collapses and the pistons 4 and 4 ′ with hollow rods 5 and 5 ′ move upward relative to the respective cylinders 2 and 2 ′, squeezing the liquid out of them through the holes 29, pulling the upper pusher 16, abutted in the lower cylinder 2 ′ and the lower pusher 17 with the hollow body 9, connected through the hollow extension 19 with the hollow stem 5 ′, towards each other, while compressing the upper element 11 and the lower 12 stops, respectively, to the sealing element 10 until tight interaction with the walls wells and pushing with Accordingly, the supports 13 and 14 slipways 15 to interact with the walls of the well with the fixation of the packer 8 in the required installation interval. Moreover, the upper 16 and lower 17 pushers are fixed in the installation position of the packer 8 by locking the upper pusher 16 with the latch 18 in the lower position relative to the housing 9. After that, the pump continues to pump fluid into the under-packer space 7 (Fig. 1) of cylinders 2 and 2 ′ to create force sufficient to disconnect the hollow rod 5 ′ (FIG. 2) by an extension 19 from the lower rod 17, for example, to break the ring 20 or shear screws. In this case, the pistons 4 (Fig. 1) and 4 ′ with hollow rods 5 and 5 ′ are moved to their highest position relative to the respective cylinders 2 and 2 ′, the radial channels 23 and 21 exit from the corresponding partitions 3 and 3 ′ into the cylinders 2 and 2 ′. Moreover, in this position, the landing tool 1 is fixed by the locking mechanism 26 of the upper cylinder 2, wrapping the protrusion 25 of the upper part 24 of the hollow rod 5 of the upper piston 4 and excluding unauthorized movement during technological operations of the pistons 4 and 4 ′ relative to the cylinders 2 and 2 ′, and the transfer channel 6 the lower hollow rod 5 ′ and the radial channel 21 provide fluid flow from the pipe string 27 through the cylinder 2 ′ bypassing the plug 22 along the hollow rods 5 and 5 ′ of the extension 19 (Fig. 2) and the hole 30 into the borehole space under the installed pack rum 8, which is recorded by the drop in the injection pressure with a manometer (not shown in FIGS. 1 and 2) on the pump and allows to carry out technological operations related, inter alia, to injection into formations (not shown in FIG. 2) located below the packer 8 (Fig.2), reagents, plugging and curable compositions. After completion of the technological operations, the landing tool 1 (Fig. 1) is removed from the packer 8 (Fig. 2), blocking the internal cavity of the housing 9, for example, with a plug 31 fixed with a shear element 32 at the end of the extension cord 19, with the snap ring 33 fixed in the packer 8 and with sealing in it with o-rings 34.

After removing the landing tool 1 from the packer 8 (FIG. 2) by 1-5 meters from the pipe string 27 (FIG. 1) through the pipe string 27 (FIG. 1), hollow rods 5 and 5 ′ of the transfer channels 6 of the piston 4 ′ , radial channels 21, extension cord 19 (FIG. 2) and aperture 30 pump the flushing fluid (for example, water). As a result, the liquid passing through the hollow rods 5 (Fig. 1) creates an injection effect with a differential pressure in the cylinders 2 between the overflow channels 6 and the radial channels 23, causing circulation of the liquid in the cylinders 2 from the channel 6 to the channel 23, which leads to the cleaning of the cylinders 2 from reagents, plugging and curable compositions, and in the lower cylinder 2 ′, the fluid flowing from the bypass channels 6 into the radial channels 21 of the cylindrical rod 5 ′ leaches the reagents tamping and curable compositions from this cylinder 2 ′. High-quality cleaning of cylinders 2 and 2 ′ is confirmed by bench and borehole tests. As a result, the curing of the plugging and curable compositions in the cylinders 2 and 2 ′ is excluded, and allows the use of the planting tool 1 after removal from the well without disassembling and cleaning for planting other packers 8 (Fig. 2). If necessary, in the future, the packer 8 can be drilled.

The proposed drillable packer allows you to expand the functionality of the drilled packer due to the ability to work with plugging and curing compositions and due to the ability to flush the planting tool immediately after installing the packer and significantly save material resources due to the possibility of using one planting tool for planting several packers.

Claims (1)

A drillable packer containing a landing tool, consisting of at least one cylinder equipped with a baffle from below, and a corresponding piston with a hollow rod communicated by transfer channels with the under-piston space of the corresponding cylinder, and a packer including a hollow cylindrical body, a sealing element with an upper and lower stops and supports for slips made with the possibility of expansion and fixation in the well, the upper and lower pushers, the upper of which interacts with the bottom cylinder, made with the possibility of moving downward relative to the housing with fixing in the lower position, and the lower pusher is rigidly connected to the rod of the lower piston with the ability to disconnect after installing the packer in the well, while the hollow rod of the lower piston is equipped with radial channels made below the overflow and a plug covering the stem cavity, characterized in that the plug is rigidly fixed between the radial and transfer channels of the hollow rod of the lower piston, the hollow rods of the upper pistons are equipped with radial channels made similarly to the radial channels of the lower piston, and the baffle of each cylinder is configured to overlap the corresponding radial channels in the transport position and open them when the pistons are moved to the upper position, while the upper part of the hollow rod of the upper piston is equipped with a protrusion, the upper cylinder is equipped with a locking top a mechanism configured to interact with the protrusion and fixing the pistons in the upper position.