CN221096495U - Integrated casing protection layering fracturing tool assembly - Google Patents

Abstract

The utility model belongs to the technical field of downhole tools for oil and gas fields, and particularly relates to an integrated casing protection layered fracturing tool assembly. The utility model comprises a main body and a valve core component. The utility model can prevent the fracturing sand from entering the inner cavities of the expansion rubber sleeve and the anchor tile while meeting the requirements of anchoring and setting the expansion rubber sleeve by the anchor tile, and avoid the blocking of the well caused by the fact that the anchor tile and the expansion rubber sleeve are not recovered, and the fracturing fluid is radially sprayed to the stratum and the sleeve from the sand blasting port, and the flow rate of the fracturing fluid is greatly reduced and the damage of the fracturing sand to the sleeve, the sand blasting port and parts nearby the sand blasting port is reduced or eliminated because the drift diameter of the sand blasting port is large. The tungsten carbide wear-resistant layer is welded around the sand blasting opening, so that the wear resistance of the sand blasting opening is greatly improved.

Description

Integrated casing protection layering fracturing tool assembly

Technical Field

The utility model belongs to the technical field of downhole tools for oil and gas fields, and particularly relates to an integrated casing protection layered fracturing tool assembly.

Background

At present, when the domestic oilfield is subjected to layered fracturing operation, the matched fracturing nozzles of the expansion packer are side-spraying nozzles, when the nozzles spray sand-carrying fluid to the casing and the stratum, the casing is easy to damage due to the rapid spraying flow speed, and when the sand-carrying fluid with high flow speed is sprayed on the casing wall, sputtered fracturing sand is extremely easy to damage the nozzles and parts near the nozzles, the setting of the expansion packing element and the tensile strength of a tool can be reduced when the fracturing construction is possibly influenced, the fracturing construction failure is possibly caused, the tubular column is broken when the tubing column is lifted, and economic loss is generated.

Therefore, an integrated casing protection layering fracturing tool assembly is urgently needed, the flow rate of sand-carrying fluid sprayed by a fracturing nozzle can be reduced while the setting of an expanding rubber cylinder and the anchoring of an oil pipe are ensured, the damage of the sand-carrying fluid to the casing, the fracturing nozzle and parts nearby the nozzle is reduced or eliminated, the safe construction of fracturing operation is guaranteed, the casing is protected, the sand adding amount of fracturing construction is increased, and the safety of a pipe column is improved.

Disclosure of utility model

The utility model aims to provide an integrated casing protection layering fracturing tool assembly which can reduce the flow rate of sand-carrying fluid sprayed by a fracturing nozzle while guaranteeing the setting of an expanding rubber cylinder and the anchoring of an oil pipe.

In order to achieve the above object, the present utility model provides the following means.

The utility model provides an integrated form sleeve pipe protection layering fracturing tool assembly, includes the main part, still includes case part, its characterized in that: the inner side of the upper end of the main body is connected with the outer side of the lower end of the upper joint and is fixed by an anti-rotation shear pin; the inner side of the upper joint is in threaded connection with the outer side of the slotted bushing; the inner side of the lower end of the slotted bushing is in threaded connection with the outer side of the upper end of the bearing sleeve and is limited by the shoulder of the main body; two sides of the middle section of the main body are respectively provided with a sand blasting opening, and the main body is provided with an axial pressure guiding channel in an axial penetrating way; the main body is provided with an anchor tile hole, the anchor tile hole is provided with an anchor tile, the anchor tile is provided with a blind hole, and the spring is arranged in the blind hole of the anchor tile; the main body is also provided with a pressing plate groove, a pressing plate is arranged in the pressing plate groove, and a hole is formed in the pressing plate; the countersunk head screw is arranged on a hole of the pressing plate, and the countersunk head screw is simultaneously arranged in a threaded blind hole of the main body; the inner side of the lower end of the main body is in threaded connection with the outer side of the upper joint of the rubber cylinder; an expansion type rubber cylinder is arranged below the upper joint of the rubber cylinder, and a lower joint of the rubber cylinder is arranged at the inner side of the combination of the upper joint of the rubber cylinder and the expansion type rubber cylinder; the upper compression ring is arranged outside the expansion type rubber cylinder and the upper joint of the rubber cylinder and is limited by the upper joint of the rubber cylinder and the main shoulder; the lower end of the lower joint of the rubber cylinder is in threaded connection with the upper end of the back cap; the outer sides of the expansion type rubber cylinder and the rubber cylinder lower joint are provided with lower compression rings limited by the rubber cylinder lower joint and the back cap shoulder; the inner side of a structure formed by the upper joint of the rubber cylinder, the expansion rubber cylinder and the lower joint of the rubber cylinder is provided with a central pipe, and the outer side of the upper end of the central pipe is in threaded connection with the inner side of the upper end of the upper joint of the rubber cylinder; a shearing ring is arranged in the inner cavity of the upper joint of the rubber cylinder and is limited by an inner side shoulder of the main body and an upper end shoulder of the central tube; the sliding sleeve is arranged on the inner side of a structure formed by the main body, the shearing ring and the central tube, the sliding sleeve is connected with the shearing ring through a sliding sleeve shear pin, and the upper end of the sliding sleeve is limited by a shoulder on the inner side of the main body; the valve core component comprises a valve core back cap, and the inner side of the lower end of the valve core back cap is in threaded connection with the outer side of the upper end of the valve core main body; the outer side of the valve core main body is provided with a main body shoulder; an elastic ring is arranged between the inner side of the lower end of the valve core back cap and the outer side of the valve core main body, and the elastic ring is limited by the valve core back cap and the valve core main body; a guide head is arranged in an inner hole of the valve core main body, the guide head and a valve core main body shoulder limit the valve core main body, and the guide head is connected with the valve core main body through a valve core shear pin; the outer side of the guide head is provided with a guide head shoulder.

Further, the slit bushing is provided with a slit.

Further, the inner side of the bearing sleeve is provided with a ring groove, the upper part of the ring groove is provided with an elastic ring shoulder, and the lower part of the ring groove is provided with a bearing shoulder.

Further, a tungsten carbide wear-resistant layer is arranged around the sand blasting opening.

Further, the upper joint of the rubber cylinder, the lower joint of the rubber cylinder and the expansion rubber cylinder are vulcanized into a whole.

Further, a liquid passing groove is formed in the outer side of the upper end of the central tube, and a central tube shoulder is further formed in the inner side of the central tube; the outer side of the throttle nozzle is in threaded connection with the inner side of the lower end of the central tube; the back cap is limited by the central tube and the throttling nozzle shoulder.

Further, a sliding sleeve shoulder is arranged on the inner side of the sliding sleeve.

Further, the elastic ring is provided with an opening structure, and the outer side of the elastic ring is provided with a hook.

The utility model has the beneficial effects of.

The utility model can prevent the fracturing sand from entering the inner cavities of the expansion rubber sleeve and the anchor tile while meeting the requirements of anchoring and setting the expansion rubber sleeve by the anchor tile, and avoid the blocking of the well caused by the fact that the anchor tile and the expansion rubber sleeve are not recovered, and the fracturing fluid is radially sprayed to the stratum and the sleeve from the sand blasting port, and the flow rate of the fracturing fluid is greatly reduced and the damage of the fracturing sand to the sleeve, the sand blasting port and parts nearby the sand blasting port is reduced or eliminated because the drift diameter of the sand blasting port is large.

The tungsten carbide wear-resistant layer is welded around the sand blasting opening, so that the wear resistance of the sand blasting opening is greatly improved.

Drawings

Fig. 1 is a schematic diagram of the structure of the present utility model.

FIG. 2 is a schematic view of the valve core component structure of the present utility model.

Fig. 3 is a full sectional view of the present utility model at the blast opening.

Fig. 4 is a three-dimensional isometric view of an elastomeric ring of the utility model.

Fig. 5 is a front view of the blast opening of the present utility model.

The serial numbers in the figures illustrate: 1-upper joint, 2-slotted bushing, 3-anti-rotation shear pin, 4-socket, 5-body, 6-sliding sleeve, 7-countersunk screw, 8-anchor shoe, 9-platen, 10-spring, 11-shear ring, 12-upper joint of packing element, 13-expansion packing element, 14-upper compression ring, 15-lower compression ring, 16-center tube, 17-lower joint of packing element, 18-back cap, 19-core back cap, 20-elastic ring, 21-core shear pin, 22-core body, 23-guide head, 24-sliding sleeve shear pin, 25-choke, 26-slit, 27-elastic ring shoulder, 28-receiving shoulder, 29-mouth, 30-tungsten carbide wear layer, 31-sliding sleeve shoulder, 32-passing groove, 33-center tube shoulder, 34-hook, 35-body shoulder, 36-guide head shoulder, 37-axial guide pressure channel.

Detailed Description

The utility model, as shown in fig. 1-5, comprises a main body 5, and also comprises a valve core component, and is characterized in that: the inner side of the upper end of the main body 5 is connected with the outer side of the lower end of the upper joint 1 and is fixed by the anti-rotation shear pin 3; the inner side of the upper joint 1 is in threaded connection with the outer side of the slotted bushing 2; the inner side of the lower end of the slotted bushing 2 is in threaded connection with the outer side of the upper end of the bearing sleeve 4 and is limited by a shoulder of the main body 5; two sides of the middle section of the main body 5 are respectively provided with a sand blasting opening 29, and the main body 5 is provided with an axial pressure guiding channel 37 in an axial penetrating way; the main body 5 is provided with an anchor tile hole, an anchor tile 8 is arranged in the anchor tile hole, a blind hole is arranged on the anchor tile 8, and a spring 10 is arranged in the blind hole of the anchor tile 8; the main body 5 is also provided with a pressing plate groove, a pressing plate 9 is arranged in the pressing plate groove, and a hole is arranged on the pressing plate 9; countersunk head screws 7 are arranged on holes of the pressing plate 9, and the countersunk head screws 7 are simultaneously arranged in threaded blind holes of the main body 5; the inner side of the lower end of the main body 5 is in threaded connection with the outer side of the upper joint 12 of the rubber cylinder; an expansion type rubber cylinder 13 is arranged below the rubber cylinder upper joint 12, and a rubber cylinder lower joint 17 is arranged on the inner side of the combination of the rubber cylinder upper joint 12 and the expansion type rubber cylinder 13; the upper compression ring 14 is arranged outside the expansion type rubber cylinder 13 and the rubber cylinder upper joint 12 and is limited by the rubber cylinder upper joint 12 and the shoulder of the main body 5; the lower end of the rubber barrel lower joint 17 is in threaded connection with the upper end of the back cap 18; the outer sides of the expansion type rubber cylinder 13 and the rubber cylinder lower joint 17 are provided with a lower compression ring 15 limited by the rubber cylinder lower joint 17 and the shoulder of the back cap 18; the inner side of a structure formed by the upper joint 12 of the rubber cylinder, the expansion rubber cylinder 13 and the lower joint 17 of the rubber cylinder is provided with a central pipe 16, and the outer side of the upper end of the central pipe 16 is in threaded connection with the inner side of the upper end of the upper joint 12 of the rubber cylinder; a shearing ring 11 is arranged in the inner cavity of the rubber barrel upper joint 12, and the shearing ring 11 is limited by an inner side shoulder of the main body 5 and an upper end shoulder of the central tube 16; a sliding sleeve 6 is arranged on the inner side of a structure formed by the main body 5, the shear ring 11 and the central tube 16, the sliding sleeve 6 is connected with the shear ring 11 through a sliding sleeve shear pin 24, and the upper end of the sliding sleeve 6 is limited by an inner side shoulder of the main body 5; the valve core component comprises a valve core back cap 19, and the inner side of the lower end of the valve core back cap 19 is in threaded connection with the outer side of the upper end of the valve core main body 22; the outer side of the valve core main body 22 is provided with a main body shoulder 35; an elastic ring 20 is arranged between the inner side of the lower end of the valve core back cap 19 and the outer side of the valve core main body 22, and the elastic ring 20 is limited by the valve core back cap 19 and the valve core main body 22; a guide head 23 is arranged in an inner hole of the valve core main body 22, the guide head 23 and a shoulder of the valve core main body 22 limit the valve core main body 22, and the guide head 23 is connected with the valve core main body 22 through a valve core shear pin 21; the outside of the guide head 23 is provided with a guide head shoulder 36.

Further, the slit bush 2 is provided with a slit 26.

Further, the inner side of the receiving sleeve 4 is provided with a ring groove, the upper part of which is provided with an elastic ring shoulder 27, and the lower part of which is provided with a receiving shoulder 28.

Further, a tungsten carbide wear-resistant layer 30 is arranged around the sand blasting opening 29.

Further, the upper joint 12, the lower joint 17 and the expansion type rubber 13 are vulcanized into a whole.

Further, the outer side of the upper end of the central tube 16 is provided with a liquid passing groove 32, and the inner side of the central tube 16 is also provided with a central tube shoulder 33; the outer side of the throttle 25 is in threaded connection with the inner side of the lower end of the central tube 16; the back cap 18 is limited by the central tube 16 and the shoulder of the throttle 25.

Further, a sliding sleeve shoulder 31 is provided on the inner side of the sliding sleeve 6.

Further, the elastic ring 20 is provided with an opening structure, and hooks 34 are arranged on the outer side.

The specific operation mode of the utility model is as follows.

The lower layer is fractured, the upper joint 1 is connected with the tubing string to reach the designed position, fracturing fluid is directly pumped into the tubing to fracture the lower layer, throttling pressure meeting the setting requirement of the expansion rubber cylinder 13 is generated when the fracturing fluid flows through the throttling nozzle 25, fluid pressure in the tubing is transmitted to an annular space between the upper joint 1 and the receiving sleeve 4 through a thin seam 26 on the slotting bush 2, and is transmitted to the inner cavities of the anchor tile 8 and the expansion rubber cylinder 13 through an axial pressure guide channel 37 on the main body 5, when the anchoring and setting requirements of the anchor tile 8 and the expansion rubber cylinder 13 are met, the thin seam 26 on the slotting bush 2 can prevent the fracturing sand from entering the inner cavities of the expansion rubber cylinder 13 and the anchor tile 8, so that the anchor tile 8 and the expansion rubber cylinder 13 are prevented from being not recovered, the clamping is caused, and the fracturing fluid is vertically sprayed to the lower layer through the throttling nozzle 25, so that the damage of the sleeve, the sand blasting mouth 29 and parts near the sand blasting mouth 29 can be avoided.

The upper layer is fractured, a valve core component consisting of a valve core back cap 19, an elastic ring 20, a valve core shear pin 21, a valve core main body 22 and a guide head 23 is put into the upper layer, under the action of hydraulic pressure and the gravity of the valve core component, when the elastic ring 20 contacts the bearing sleeve 4, the outer diameter of the elastic ring 20 is compressed and reduced due to elasticity of the elastic ring 20, the elastic ring 20 returns to the original size after entering an annular groove at the inner side of the bearing sleeve 4 under the action of hydraulic pressure, a hook 34 on the elastic ring 20 is limited by an elastic ring shoulder 27, a main body shoulder 35 is limited by a bearing shoulder 28, and the elastic ring 20 and the valve core main body 22 are limited in the inner cavity of the bearing sleeve 4 by the elastic ring shoulder 27 and the bearing shoulder 28; under the action of hydraulic pressure, the valve core shear pin 21 is sheared off, the guide head 23 descends under the action of hydraulic pressure, the guide head shoulder 36 is limited by the slide sleeve shoulder 6, the slide sleeve 6 shears off the slide sleeve shear pin 24 under the action of hydraulic pressure, the slide sleeve 6 and the guide head 23 descend under the action of hydraulic pressure, the sand blasting port 29 is opened, and the lower end surface shoulder of the slide sleeve 6 is limited by the central tube shoulder 33; when the upper layer is fractured, throttling pressure meeting the setting requirement of the expansion rubber cylinder 13 is generated when the fracturing fluid flows through the valve core main body 22, fluid pressure in an oil pipe is transmitted to an annular space between the upper joint 1 and the bearing sleeve 4 through the thin slits 26 on the slotting bush 2, the fluid pressure is transmitted to the anchor shoe 8 and the inner cavity of the expansion rubber cylinder 13 through the axial pressure guide channel 37 on the main body 5, the anchoring of the anchor shoe 8 and the setting requirement of the expansion rubber cylinder 13 are met, meanwhile, the thin slits 26 on the slotting bush 2 can prevent the fracturing sand from entering the inner cavities of the expansion rubber cylinder 13 and the anchor shoe 8, the sand blasting mouth 29 on the main body 5 is prevented from being recycled, the clamping is caused, the fracturing fluid is radially sprayed to the stratum and the sleeve from the sand blasting mouth 29 on the main body 5, the flow speed of the fracturing fluid is greatly reduced, the damage of the fracturing sand to the sleeve, the sand blasting mouth 29 and parts near the mouth 29 is reduced or eliminated, the tungsten carbide wear-resistant layer 30 is welded around the sand blasting mouth 29, and the damage of the fracturing sand to the sand blasting mouth 29 is further reduced.

After the fracturing construction is finished, when the pressure in the oil pipe is balanced with the annular pressure of the oil pipe and the annular pressure of the sleeve, the anchor shoe 8 is recovered to be unlocked, the expansion type rubber cylinder 13 is recovered to be unlocked, the lifting oil pipe column is used for lifting the product out of the well, if the product is blocked when the oil pipe column is lifted, the forward rotation oil pipe column can be used for cutting off the anti-rotation shear pin 3, the forward rotation oil pipe column is continued, the left rotation threads between the upper joint 1 and the main body 5 are reversely buckled and separated, the lifting oil pipe column is used for lifting the oil pipe column, the oil pipe column and the upper joint 1, the slotting bush 2 and the bearing sleeve 4 out of the well, the oil pipe column is prevented from being blocked, and the safety of underground operation construction is increased.

It will be appreciated that the above detailed description of the utility model is provided for illustration of the utility model and not for limitation of the technical solutions described in the embodiments of the utility model, and that the person skilled in the art should understand that the utility model may be modified or substituted for the same technical effects; as long as the use requirement is met, the utility model is within the protection scope of the utility model.

Claims (8)

1. The utility model provides an integrated form sleeve pipe protection layering fracturing tool assembly, includes main part (5), still includes case part, its characterized in that: the inner side of the upper end of the main body (5) is connected with the outer side of the lower end of the upper joint (1) and is fixed by the anti-rotation shear pin (3); the inner side of the upper joint (1) is in threaded connection with the outer side of the slotting bushing (2); the inner side of the lower end of the slotted bushing (2) is in threaded connection with the outer side of the upper end of the bearing sleeve (4) and is limited by the shoulder of the main body (5); two sides of the middle section of the main body (5) are respectively provided with a sand blasting opening (29), and the main body (5) is provided with an axial pressure guiding channel (37) in an axial penetrating way; the main body (5) is provided with an anchor tile hole, an anchor tile (8) is arranged in the anchor tile hole, a blind hole is arranged on the anchor tile (8), and a spring (10) is arranged in the blind hole of the anchor tile (8); the main body (5) is also provided with a pressing plate groove, a pressing plate (9) is arranged in the pressing plate groove, and a hole is formed in the pressing plate (9); the countersunk head screw (7) is arranged on a hole of the pressing plate (9), and the countersunk head screw (7) is simultaneously arranged in a threaded blind hole of the main body (5); the inner side of the lower end of the main body (5) is in threaded connection with the outer side of the upper joint (12) of the rubber cylinder; an expansion type rubber cylinder (13) is arranged below the rubber cylinder upper joint (12), and a rubber cylinder lower joint (17) is arranged at the inner side of the combination of the rubber cylinder upper joint (12) and the expansion type rubber cylinder (13); the upper compression ring (14) is arranged outside the expansion type rubber cylinder (13) and the rubber cylinder upper joint (12) and is limited by the rubber cylinder upper joint (12) and the shoulder of the main body (5); the lower end of the rubber cylinder lower joint (17) is in threaded connection with the upper end of the back cap (18); the outer sides of the expansion type rubber cylinder (13) and the rubber cylinder lower joint (17) are provided with a lower compression ring (15) limited by the rubber cylinder lower joint (17) and the shoulder of the back cap (18); the inner side of a structure formed by the upper joint (12) of the rubber cylinder, the expansion rubber cylinder (13) and the lower joint (17) of the rubber cylinder is provided with a central tube (16), and the outer side of the upper end of the central tube (16) is in threaded connection with the inner side of the upper end of the upper joint (12) of the rubber cylinder; a shearing ring (11) is arranged in the inner cavity of the rubber barrel upper joint (12), and the shearing ring (11) is limited by an inner side shoulder of the main body (5) and an upper end shoulder of the central pipe (16); a sliding sleeve (6) is arranged on the inner side of a structure formed by the main body (5) and the shearing ring (11) and the central tube (16), the sliding sleeve (6) is connected with the shearing ring (11) through a sliding sleeve shear pin (24), and the upper end of the sliding sleeve (6) is limited by an inner side shoulder of the main body (5); the valve core component comprises a valve core back cap (19), and the inner side of the lower end of the valve core back cap (19) is in threaded connection with the outer side of the upper end of the valve core main body (22); the outer side of the valve core main body (22) is provided with a main body shoulder (35); an elastic ring (20) is arranged between the inner side of the lower end of the valve core back cap (19) and the outer side of the valve core main body (22), and the elastic ring (20) is limited by the valve core back cap (19) and the valve core main body (22); a guide head (23) is arranged in an inner hole of the valve core main body (22), the guide head (23) and a shoulder of the valve core main body (22) limit the valve core main body (22), and the guide head (23) is connected with the valve core main body (22) through a valve core shear pin (21); the outside of the guide head (23) is provided with a guide head shoulder (36).

2. The integrated casing protection layered fracturing tool assembly of claim 1, wherein: the slit bushing (2) is provided with a slit (26).

3. The integrated casing protection layered fracturing tool assembly of claim 1, wherein: the inner side of the bearing sleeve (4) is provided with a ring groove, the upper part of the ring groove is provided with an elastic ring shoulder (27), and the lower part of the ring groove is provided with a bearing shoulder (28).

4. The integrated casing protection layered fracturing tool assembly of claim 1, wherein: and a tungsten carbide wear-resistant layer (30) is arranged around the sand blasting opening (29).

5. The integrated casing protection layered fracturing tool assembly of claim 1, wherein: the upper joint (12) of the rubber cylinder, the lower joint (17) of the rubber cylinder and the expansion rubber cylinder (13) are vulcanized into a whole.

6. The integrated casing protection layered fracturing tool assembly of claim 1, wherein: the outer side of the upper end of the central tube (16) is provided with a liquid passing groove (32), and the inner side of the central tube (16) is also provided with a central tube shoulder (33); the inner side threads at the lower end of the central tube (16) are connected with the outer side of the throttling nozzle (25); the back cap (18) is limited by the central tube (16) and the shoulder of the throttling nozzle (25).

7. The integrated casing protection layered fracturing tool assembly of claim 1, wherein: a sliding sleeve shoulder (31) is arranged on the inner side of the sliding sleeve (6).

8. The integrated casing protection layered fracturing tool assembly of claim 1, wherein: the elastic ring (20) is provided with an opening structure, and the outer side of the elastic ring is provided with a hook (34).