RU2483187C1 - Guiding device for introduction of shank to side shaft - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: device includes a guiding part with a bevel cut, a side hole with a nozzle for passage of fluid from the cur side, a retractable radial stock located in a cylindrical part from the side hole. Cylindrical part is composite and consists of upper and lower units connected to each other above the retractable sock by means of a hinge connection to a channel with the flow cross-section that is larger than that of the nozzle of the side hole. In cylindrical part above the hinge connection allowing restricted deviation of the lower unit relative to the upper one to the opposite side of the stock there are radial holes tightly covered from inside with a seat of a free-fall ball. Between the hinged connection and the seat there installed is a plug with side longitudinal flow passage; at that, the seat is fixed relative to upper unit in transport position with a shear element and has the possibility of being moved downwards till interaction with the plug tightly covering the flow passage of the seat.

EFFECT: improving reliability of the guiding device for introduction of the shank to the side shaft.

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Description

The invention relates to the oil and gas industry and can be used in the construction of sidetracks and multilateral wells.

The known "Guide device for the targeted input of a technological tool into the side wellbore during its operation" (patent RU No. 2302510 C1, IPC 7 ЕВВ 23/03, publ. Bull. No. 19 dated 07/10/2007), including a transporting body with a mechanism for changing the direction of movement, which consists of a barrel on which a connecting rod with a shank is suspended using a sleeve nut, a connecting rod rotator is attached to the barrel by thread, having spline protrusions and an annular groove, between the shaft end and the splined protrusions of the connecting rod rotator the washer, spring elements are installed in the annular groove of the connecting rod rotor, which are in constant contact with the connecting rod shank, the connecting rod is connected to the die-valve assembly by means of an intermediate sub, in the housing of which there is a sleeve with a mounted assembly for fixing the technological tool entering the side shaft, fixed in the housing of the die-valve assembly with a shear pin, and ends with a baffle with holes and a stopper fixed to the baffle with a latch, and the fixation unit consists of h housing, on an inclined surface of which a die is fixed with a shear pin and a latch, while the housing of the die-valve assembly and the sleeve have a combined hole.

The disadvantages of this guide device are:

- the possibility of failure of the mechanism for changing the direction of movement, because there is no sealing between the connecting rod and the housing and the pressure of the fluid flowing through the combined hole may not be enough to deflect the connecting rod;

- not provided for the possibility of cementing the shank of the side trunk;

- complexity in manufacturing and, as a result, high material costs.

The closest technical solution is “Shoe guide tube” (patent RU No. 89165 U1, IPC 7 ЕВВ 29/10, publ. Bull. No. 33 of 11/27/2009), including cylindrical and conical guide parts, and the tip of the guide tube is offset to its outer diameter, a lateral hole for the passage of fluid, made inclined to the axis of the housing and provided with a nozzle, in addition, in the cylindrical part of the tube there is a retractable rod having a spherical tip.

Known guide plug does not provide input of the shank into the side barrel, because the jet thrust of the liquid jet is not enough to deflect the pipe string, which is confirmed by bench tests, and the possibility of cementing the side shaft shank is not provided.

The technical task of the invention is the creation of a simple reliable design of the device guide, allowing you to enter the liner in the lateral trunk of a multilateral well with subsequent cementing.

The technical problem is solved by a guiding device, including a cylindrical part and a guiding part with an oblique cut, a side hole with a nozzle for fluid passage from the cut side and a retractable radial rod located in the cylindrical part from the side of the side hole.

What is new is that the cylindrical part is made of a team consisting of upper and lower blocks connected to each other above the sliding rod by a swivel connection with a channel with a passage section larger than the nozzle section of the side hole, while in the cylindrical part above the swivel, which allows limited deflection the lower block relative to the upper side, opposite to the stem, made radial holes sealed from the inside by the seat of the throw ball, and between the hinge joint and the seat m, a plug with a lateral longitudinal flow channel is installed, and the saddle is fixed relative to the upper block in the transport position by a shear element and is arranged to move downward until interacting with the plug tightly blocking the passage channel of the saddle.

Figure 1 shows a guide device for introducing a shank into the side trunk (section).

Figure 2 shows a section aa in figure 1.

Figure 3 shows the device guide in the process of entering it into the side trunk (section).

The guide device for introducing the shank into the side barrel contains a guide part 1 (Figs. 1, 3) with an oblique cut 2 and a side hole 3 with a nozzle 4 for fluid passage from the cut 2 side, a retractable radial rod 5 located on the side of the side hole 3 in cylindrical part 6 made by the team. The cylindrical part 6 consists of an upper 7 and a lower 8 blocks, interconnected above the extension rod 5 by a swivel joint 9 with a channel 10 with a passage section larger than the nozzle section 4 of the side hole 3. Moreover, in the cylindrical part 6 above the swivel joint 9, allowing to deflect the lower block 8 relative to the upper 7 to the opposite side from the rod 5, radial holes 11 are made, hermetically sealed from the inside by the seat 12 of the throw ball 13. A plug 14 is installed between the hinge joint 9 and the seat 12 (Fig.1-3) with a lateral longitudinal flow channel 15. Moreover, the seat 12 (Fig.1, 3) is fixed relative to the upper block 7 in the transport position by a shear element 16 and is arranged to move downward until interacting with the stopper 14, hermetically blocking the passage channel 17 of the saddle 12.

The device guide works as follows.

The first casing 18 is attached to the device (Fig. 2). A casing string of the required length is assembled and on the drill pipes (not shown in Fig.) Are lowered into the well 19 so that the guide part 1 with an oblique cut 2 is 1.5-2 m below the “window” 20 cut in the production string 21 of the main wellbore 19. Connect to the lead pipe (not shown in FIG.) And raise the layout 5-6 m above the entrance to the side well 22. Using a mud pump or cementing unit (not shown in FIG.), The circulation of the flushing fluid is restored and resumed mini layout release cial rate. In this case, the washing liquid passes through the lateral flow channel 15 (Figs. 1-3) of the plug 14, the channel 10 (Figs. 1, 3) and the nozzle 4 of the hole 3, and since the passage section of the channel 10 of the swivel joint 9 is made larger than the cross section of the nozzle 4 of the hole 3, due to the creation of reactive thrust, the lower block 8 of the cylindrical part 6 of the device is bent relative to the upper block 7 in the swivel joint 9 by a predetermined amount and the device is pressed against the opposite side hole 3 the wall of the production casing 21 (figure 3). Due to the pressure drop across the nozzle 4 (FIGS. 1, 3), the rod 5 is extended from the cylindrical part 6. The diameter of the circumscribed circle of the device with the extended rod 5 is made smaller than the inner diameter of the production string 21 (FIG. 3) of the main wellbore 19, but larger than the diameter of the side barrel 22. Therefore, if the device passed freely in the design interval, stop the descent, raise the tool 5-6 m above the entrance to the side trunk 22, rotate the layout and lower the layout. This operation is repeated until the rod 5 (FIGS. 1, 3) is planted on the lower edge of the “window” 20 (FIG. 3), while reducing the weight of the pipe string will indicate that the device has entered the side barrel 22. Stop the pump, raise the tool by 0 , 5 m, rotate it by 120 °, to enter the rod 5 (Fig. 1, 3) into the cylindrical part 6 while resuming the descent of the tool until the casing string passes into the side shaft 22 (Fig. 3), and descend it to the design depths. Then, a ball 13 is introduced into the drill pipe string (Figs. 1, 3). The ball 13 sits in the seat 12, the shear element 16 is destroyed, while the pressure drop on the manometer (not shown in Fig.) Will show that the shear element 16 has collapsed, and the seat 12 is moved down to interact with the stopper 14, which hermetically closes the passage passage 17 of the seat 12. At the same time, radial holes 11 are opened, allowing cement mortar to be injected into the casing string and the sidetrack 22 secured (Fig. 3).

An advantage of the proposed guide device for introducing the liner into the lateral wellbore is that its simple reliable design allows the liner to be inserted into the lateral wellbore of a multilateral well with subsequent cementing thereof.

Claims (1)

A guide device for introducing a shank into the side barrel, including a cylindrical part and a guiding part with an oblique cut, a lateral hole with a nozzle for fluid passage from the cut side and a retractable radial rod located in the cylindrical part from the side of the side opening, characterized in that the cylindrical part is made Team, consisting of upper and lower blocks, interconnected above the sliding rod by a swivel with a channel with a passage section larger than the nozzle section of the side hole while in the cylindrical part above the hinge, which allows you to bend the lower block to the upper side opposite to the rod, there are made radial holes sealed inside from the saddle of the throw ball, and a plug with a lateral longitudinal flow channel is installed between the hinge and the saddle, moreover, the saddle fixed relative to the upper block in the transport position by a shear element and configured to move down to interact with the plug, hermetically sealed rekryvayuschey saddle entrance channel.

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