CN215672124U - Cable-through water injection packer - Google Patents

Cable-through water injection packer Download PDF

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Publication number
CN215672124U
CN215672124U CN202121470601.0U CN202121470601U CN215672124U CN 215672124 U CN215672124 U CN 215672124U CN 202121470601 U CN202121470601 U CN 202121470601U CN 215672124 U CN215672124 U CN 215672124U
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CN
China
Prior art keywords
cable
sleeved
hydraulic cylinder
seat
backwashing
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CN202121470601.0U
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Chinese (zh)
Inventor
董乔云
靳庆珍
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YANCHENG XINYUAN PETROCHEMICAL MACHINERY CO Ltd
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YANCHENG XINYUAN PETROCHEMICAL MACHINERY CO Ltd
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Abstract

The utility model provides a cable-passing water injection packer, which belongs to the field of oilfield exploitation equipment and comprises a setting mechanism and a tubular column connecting mechanism, wherein the inner cavity of the setting mechanism is of an equal-diameter structure and is coaxially arranged with a water injection tubular column; the pipe column connecting mechanism comprises an upper cable joint and a lower cable joint, an upper cable hole is formed in the upper cable joint and used for allowing a cable to penetrate in, a lower cable hole is formed in the lower cable joint and used for allowing the cable to penetrate out, and the upper cable hole and the lower cable hole are communicated with the cable channel and are located on the same cross section. The packer disclosed by the utility model is convenient for the running-in of other tools in later-stage operation, and can enable a cable to smoothly pass in and out.

Description

Cable-through water injection packer
Technical Field
The utility model belongs to the field of oil exploitation equipment, and particularly relates to a cable-passing water injection packer.
Background
In oil recovery water injection operation, often need use the water injection packer, according to the detection needs of different water injection layers in the water injection well, still need go into the cable in the well, but the setting of packer in the sleeve pipe leads to the cable can't pass, this just needs to pass the cable in the inner structure of packer in advance, and water injection packer itself structure need design backwash passageway, therefore its inner structure is limited, so common cable packer that crosses on the market is the expansion cable packer or has eccentric design's compression water injection packer mostly.
In the process of implementing the utility model, the inventor finds that the prior art has at least the following defects: the existing eccentric water injection packer is not beneficial to the downward placement of subsequent tools and is inconvenient to use.
SUMMERY OF THE UTILITY MODEL
Based on the background problem, the utility model aims to provide a cable-passing water injection packer which can facilitate the running-in of other tools in the later operation and enable a cable to smoothly pass in and out.
In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:
the over-cable water injection packer comprises a setting mechanism and a pipe column connecting mechanism,
the inner cavity of the setting mechanism is of an equal-diameter structure and is coaxially arranged with the water injection pipe column, and a cable channel is axially penetrated through the setting mechanism;
and a cable hole for a cable to penetrate into/out of is formed in the pipe column connecting mechanism, and the cable hole is communicated with the cable channel and is positioned on the same section.
Further, the setting mechanism includes:
the pipe wall of the central pipe is provided with an upper cable channel along the axial direction;
the side wall of the hydraulic cylinder base is provided with a lower cable channel along the axial direction, the lower cable channel is communicated with the upper cable channel to form a cable channel, and the inner diameter of the hydraulic cylinder base is equal to that of the central pipe; the tubular column coupling mechanism includes:
the cable-passing upper joint is connected to the top of the central tube, and is provided with an upper cable hole which is communicated with the upper cable channel;
and the upper cable lower joint is connected to the lower part of the hydraulic cylinder seat, and a lower cable hole is formed in the upper cable lower joint and communicated with the lower cable channel.
Still further, the setting mechanism further comprises:
setting a push ring;
the upper hydraulic cylinder is sleeved on the central pipe and can be movably arranged along the axial direction of the central pipe;
the upper piston is sleeved on the central pipe and is positioned in the upper hydraulic cylinder, one end of the upper piston is in threaded connection with the central pipe, and the other end of the upper piston is in threaded connection with the hydraulic cylinder seat;
the lower hydraulic cylinder is sleeved on the hydraulic cylinder seat and can move along the axial direction of the hydraulic cylinder seat, the longitudinal section of the lower hydraulic cylinder is of a Z-shaped structure, and the lower hydraulic cylinder is in threaded connection with the upper hydraulic cylinder;
and the lower piston is sleeved on the hydraulic cylinder seat and is positioned in the lower hydraulic cylinder, and the lower piston is in threaded connection with the hydraulic cylinder seat.
Further, cable water injection packer still includes sealing mechanism, sealing mechanism includes:
the rubber cylinder seat is sleeved on the central pipe and is in threaded connection with the connecting short section, the setting push ring is sleeved on the rubber cylinder seat, and the setting push ring is fixed with the connecting short section through symmetrically distributed setting shear pins;
and the rubber cylinder group is sleeved on the rubber cylinder seat and consists of two side rubber cylinders and a middle rubber cylinder positioned between the two side rubber cylinders, and a spacer ring is sleeved between the side rubber cylinders and the middle rubber cylinder.
Furthermore, the outer surface of the rubber cylinder seat is in threaded connection with a positioning ring, and the positioning ring is arranged close to the edge rubber cylinder; and the rubber cylinder seat is also sleeved with a balance piston, and the balance piston is in threaded connection with the positioning ring.
Further, it still includes locking mechanism to cross cable water injection packer, locking mechanism includes:
the locking ring seat is sleeved on the central pipe and is in threaded connection with the connecting short section, and an annular groove is formed in the outer wall of the locking ring seat;
the locking ring is sleeved on the annular groove, and outer locking teeth are arranged on the outer wall of the locking ring;
the lock sleeve is sleeved on the lock ring seat, one end, far away from the lock ring, of the lock sleeve is in threaded connection with the upper hydraulic cylinder, inner lock teeth are arranged on the inner wall of the lock sleeve and matched with the outer lock teeth, and the inner lock teeth and the outer lock teeth are meshed and locked after the packer is set.
Further, cable water injection packer still includes backwash mechanism, backwash mechanism includes:
the upper backwashing sleeve is in threaded connection with the upper connector of the cable, and is provided with backwashing holes for well washing liquid to enter;
the backwashing valve is sleeved on the central pipe and is positioned in the upper backwashing sleeve, and the backwashing valve can be movably arranged along the axial direction;
the backwashing valve seat is of a Z-shaped structure, one end of the backwashing valve seat is sleeved on the rubber cylinder seat, the other end of the backwashing valve seat is sleeved on the balance piston, and the backwashing valve seat is in threaded connection with the upper backwashing sleeve;
the backwashing channel is formed between the rubber cylinder seat and the central pipe and is of a circular structure, and through holes communicated with the backwashing channel are formed in the rubber cylinder seat, the backwashing valve and the seat seal push ring, so that flushing fluid can enter the backwashing channel or flow out of the backwashing channel;
and the lower backwashing tank is arranged on the lock sleeve and used for allowing the flushing fluid to flow out.
Further, it still includes deblocking mechanism to cross cable water injection packer, deblocking mechanism includes:
and the deblocking shear pins penetrate through the joint of the backwashing valve seat and the balance piston and are symmetrically arranged.
Further, cross the cable lower clutch with piston threaded connection down, it still overlaps on the cable lower clutch and is equipped with the adjustment cap to cross, the adjustment cap is along the axial portable setting of cable lower clutch.
Further, the end part of the cable hole is provided with a sealing structure so as to enable the cable channel to be sealed from the outside.
Compared with the prior art, the embodiment of the utility model at least has the following effects:
1. the inner cavity of the setting mechanism is of an equal-diameter structure and is coaxially arranged with the water injection pipe column, so that other tools can be conveniently put in later operation; the setting mechanism is axially penetrated with a cable channel, the pipe column connecting mechanism is provided with a cable hole for a cable to penetrate in/out, and the cable hole is communicated with the cable channel and is positioned on the same cross section, so that the cable can smoothly penetrate in and out.
2. The inner diameter of the hydraulic cylinder seat is equal to that of the central pipe, namely, the large drift diameter design inside the packer meets the drift diameter requirement in a water injection operation well.
3. According to the utility model, the sealing structure is arranged at the cable hole, so that the cable channel is ensured to be isolated and sealed from the outside.
4. The packer disclosed by the utility model can meet the requirement of cable logging and the backwashing operation of a water injection well.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic structural diagram of a water injection packer through a cable according to an embodiment of the utility model;
FIG. 2 is a schematic structural diagram of a lower cable connector according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a center tube and a rubber cartridge holder in an embodiment of the utility model;
FIG. 4 is a schematic view of the lock ring housing and lock ring configuration in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings of the specification.
In order to solve the problems that the existing eccentric water injection packer is not beneficial to the downward putting of subsequent tools and is inconvenient to use, the utility model provides the cable-passing water injection packer, the inner diameter of a setting mechanism of the cable-passing water injection packer is set to be of an equal-diameter structure and is coaxially arranged with a water injection pipe column, so that the cable-passing water injection packer is convenient to be arranged below other tools in later-stage operation; the setting mechanism is provided with a cable channel, the pipe column connecting mechanism is provided with a cable hole, the cable hole is communicated with the cable channel and is positioned on the same cross section, and a cable can conveniently and smoothly penetrate in and out.
The utility model is described below by means of specific embodiments.
A cable-passing water injection packer comprises a setting mechanism, a pipe column connecting mechanism, a sealing mechanism, a locking mechanism, a backwashing mechanism and an unsealing mechanism as shown in figure 1.
In this embodiment, the setting mechanism includes: a central tube 101, an upper cylinder 102, an upper piston 103, a cylinder block 104, a lower cylinder 105, a lower piston 106, and a setting push ring 107.
Specifically, the outer wall of the central tube 101 is stepped, the inner cavity of the central tube is of an equal-diameter structure, an upper cable channel 101-1 is axially arranged on the tube wall of the large-outer-diameter part of the central tube 101, and the upper cable channel 101-1 extends to the bottom end of the central tube 101.
The upper hydraulic cylinder 102 is sleeved on the central pipe 101 and can move along the axial direction of the central pipe 101, as shown in fig. 1, the upper hydraulic cylinder 102 is specifically arranged at the bottom of the central pipe 101; the inner cavity of the upper hydraulic cylinder 102 is stepped, the small inner diameter portion of the upper hydraulic cylinder 102 is sleeved on the central pipe 101 and sealed by a sealing gasket, the outer wall of the upper hydraulic cylinder 102 is also stepped, and the small outer diameter portion of the upper hydraulic cylinder 102 is provided with an external thread to be in threaded connection with a lock sleeve 403 to be described later.
The upper piston 103 is sleeved on the central pipe 101 and is located on the large inner diameter portion of the upper hydraulic cylinder 102, the inner diameter of the upper piston 103 is in a step shape, the small inner diameter portion of the upper piston 103 is in threaded connection with the central pipe 101 and is sealed through a sealing gasket, and the large inner diameter portion of the upper piston 103 is in threaded connection with the hydraulic cylinder seat 104.
The cylinder seat 104 is coaxially connected to the bottom end of the central tube 101 and is in threaded connection with the large inner diameter part of the upper piston 103; the inner diameter of the hydraulic cylinder base 104 is equal to that of the central pipe 101, so that a large-diameter design is formed, and other tools can be conveniently placed down in later-stage operation; the side wall of the hydraulic cylinder base 104 is provided with a lower cable channel 104-1 along the axial direction, and the lower cable channel 104-1 is communicated with the upper cable channel 101-1 to form a cable channel, so that a cable can conveniently pass through the cable channel.
The lower hydraulic cylinder 105 is sleeved on the hydraulic cylinder base 104 and can move along the axial direction of the hydraulic cylinder base 104, specifically, the longitudinal section of the lower hydraulic cylinder 105 is of a Z-shaped structure, a small inner diameter portion of the lower hydraulic cylinder 105 is sleeved on the hydraulic cylinder base 104 and sealed by a sealing gasket, a small outer diameter portion of the lower hydraulic cylinder 105 is in threaded connection with a large inner diameter portion of the upper hydraulic cylinder 102, and the outer diameter of the lower hydraulic cylinder 105 is equal to the outer diameter of the upper hydraulic cylinder 102.
The lower piston 106 is sleeved on the cylinder base 104 and located at the large inner diameter portion of the lower cylinder 105, specifically, the inner diameter of the lower piston 106 is stepped, the small inner diameter portion of the lower piston 106 is in threaded connection with the cylinder base 104 and sealed by a sealing gasket, and the large inner diameter portion of the lower piston 106 is in threaded connection with a lower cable connector 202 described later.
The setting push ring 107 is sleeved on a rubber cylinder seat 301 which will be described later, the setting push ring 107 is fixed with the connecting short section 109 through setting shear pins 108, and the setting shear pins 108 are symmetrically distributed; specifically, the connection nipple 109 is a Z-shaped structure, a large inner diameter portion of the connection nipple 109 is in threaded connection with a rubber cylinder base 301 described later, a small inner diameter portion is sleeved on the central tube 101, and a large outer diameter portion of the connection nipple 109 is fixed with the setting push ring 107 through the setting shear pin 108.
In this embodiment, the pipe string connecting mechanism includes: a cable upper connector 201 and a cable lower connector 202.
Specifically, the cable-passing upper joint 201 is connected to the top end of the central tube 101, the inner diameter of the cable-passing upper joint 201 is stepped, and the small inner diameter portion of the cable-passing upper joint 201 is sleeved on the small outer circle at the top of the central tube 101 and is sealed by a sealing gasket. An upper cable hole 201-1 is axially formed in the side wall of the cable-passing upper connector 201, the upper cable hole 201-1 is communicated with the upper cable channel 101-1, and the upper cable hole 201-1 is used for a cable to penetrate.
The upper cable lower joint 202 is connected to the bottom end of the cylinder base 104, the outer diameter of the upper cable lower joint 202 is stepped, the small outer diameter portion of the upper cable lower joint 202 is in threaded connection with the large inner diameter portion of the lower piston 106 through external threads, and the large outer diameter portion of the upper cable lower joint 202 abuts against the large inner diameter portion of the lower cylinder 105.
As shown in fig. 2, an adjusting cap 203 is further screwed on the large-outer-diameter portion of the cable lower joint 202, the adjusting cap 203 can move along the axial direction of the cable lower joint 202, and a locking screw 203-1 is further threaded on the adjusting cap 203.
As shown in fig. 1, a lower cable hole 202-1 is axially formed in a side wall of the cable lower connector 202, the lower cable hole 202-1 is communicated with the lower cable channel 104-1, and the lower cable hole 202-1 is used for allowing a cable to pass through.
In order to ensure that the cable channel is sealed from the outside, in this embodiment, sealing structures are provided at the ends of the upper cable hole 201-1 and the lower cable hole 202-1, and the sealing structures may be sealing plugs, but are not limited thereto.
In this embodiment, the sealing mechanism includes: a rubber cylinder base 301, an edge rubber cylinder I302, a middle rubber cylinder 303 and an edge rubber cylinder II 304.
Specifically, the rubber cylinder base 301 is sleeved on the central tube 101, and the bottom end of the rubber cylinder base 301 is in threaded connection with the large inner diameter portion of the connecting short section 109 through an external thread.
It should be noted that, as shown in fig. 3, an annular groove 101-2 is formed in a pipe wall of the central pipe 101, and the rubber cylinder base 301 is specifically sleeved at the annular groove 101-2 of the central pipe 101, so that an annular cavity, that is, a backwash channel 504 described later, is formed between an inner wall of the rubber cylinder base 301 and an outer wall of the central pipe 101. It should be noted that the annular groove 101-2 may be a through groove, and the backwash passage 504 is communicated with the upper cable passage 101-1.
As shown in fig. 1, the side packing element I302, the middle packing element 303 and the side packing element II 304 are sequentially sleeved on the packing element seat 301 from bottom to top, and the side packing element I302 abuts against the setting push ring 107; a spacer ring I305 is further sleeved between the side rubber cylinder I302 and the middle rubber cylinder 303, and a spacer ring II 306 is further sleeved between the middle rubber cylinder 303 and the side rubber cylinder II 304.
The rubber tube base 301 is further sleeved with a positioning ring 307, the positioning ring 307 is abutted to the edge rubber tube II 304, and the positioning ring 307 is in threaded connection with the rubber tube base 301 through internal threads; the rubber barrel seat 301 is further sleeved with a balance piston 308, and the balance piston 308 is connected with the positioning ring 307 through an internal thread.
When the packer is unsealed, the positioning ring 307 and the balance piston 308 are locked on the rubber cylinder seat 301 and are kept still, and when the pipe string is lifted up, the cable upper joint 201, an upper backwashing sleeve 501 and a backwashing valve seat 503 which are connected together synchronously move upwards to cut a unsealing shear pin 601 which is described later, so that the unsealing is finished.
In this embodiment, the locking mechanism includes: a lock ring seat 401, a lock ring 402, and a lock sleeve 403.
Specifically, the lock ring seat 401 is sleeved on the central tube 101, an inner cavity of the lock ring seat 401 is stepped, a small inner diameter portion of the lock ring seat 401 is attached to an outer wall of the central tube 101, and a large inner diameter portion of the lock ring seat 401 is in threaded connection with a small outer diameter portion of the connection nipple 109.
As shown in fig. 4, an annular lock groove 401-1 is formed in an outer wall of the lock ring seat 401, the lock ring 402 is sleeved in the annular lock groove 401-1, and an outer lock tooth is arranged on an outer wall of the lock ring 402.
As shown in fig. 1, the lock sleeve 403 is sleeved on the lock ring seat 401, the bottom end of the lock sleeve 403 is connected with the upper hydraulic cylinder 102 through an internal thread, and the top end extends into the setting push ring 107; and the inner wall of the lock sleeve 403 is provided with inner lock teeth, the inner lock teeth are matched with the outer lock teeth, and after the packer is set, the inner lock teeth and the outer lock teeth are meshed and locked.
In this embodiment, the backwashing mechanism includes: an upper backwash jacket 501, backwash valve 502, backwash valve seat 503, backwash passage 504, and lower backwash tank 505.
Specifically, the upper backwashing sleeve 501 is connected with the bottom of the cable-passing upper connector 201 through an internal thread, and the upper backwashing sleeve 501 is radially provided with backwashing holes 501-1 for well-flushing fluid to enter;
the backwash valve 502 is sleeved on the central pipe 101, specifically sleeved at the joint of the central pipe 101 and the rubber cylinder seat 301, the backwash valve 502 is positioned in the upper backwash sleeve 501, and the backwash valve 502 is movably arranged along the axial direction.
The backwash valve 502 of the present embodiment is a combination, the backwash valve 502 is composed of a body, a small nut and a pressing cap, and the structure of the backwash valve 502 is disclosed in the applicant's prior application, and therefore, the structure thereof is not described again in the present embodiment.
The longitudinal section of the backwashing valve seat 503 is of a Z-shaped structure, a small inner diameter part of the backwashing valve seat 503 is sleeved on the rubber barrel seat 301, a large inner diameter part of the backwashing valve seat 503 is sleeved on the balance piston 308, and a small outer diameter part of the backwashing valve seat 503 is in threaded connection with the bottom of the upper backwashing sleeve 501 through an external thread;
as shown in fig. 3, the backwashing channel 504 is formed between the rubber cylinder base 301 and the central pipe 101, and is of a circular structure, the top of the rubber cylinder base 301 is provided with a through hole I301-1 communicated with the backwashing channel 504, and the bottom of the rubber cylinder base 301 is provided with a through hole II 301-2 communicated with the backwashing channel 504; as shown in fig. 1, the lower backwash tank 505 is opened on the lock casing 403.
The position of the through hole I301-1 corresponds to the position of the backwashing valve 502 and can be communicated with the backwashing hole 501-1 so as to enable the flushing liquid to enter the backwashing channel 504, the position of the through hole II 301-2 corresponds to the position of the setting push ring 107, and the packer can be communicated with the lower backwashing tank 505 after being set so as to enable the flushing liquid in the backwashing channel 504 to flow out.
In this embodiment, the decapsulation mechanism includes decapsulation staples 601, as shown in fig. 1, the decapsulation staples 601 are disposed at a connection position of the backwash valve seat 503 and the balance piston 308, specifically, the decapsulation staples 601 penetrate through the backwash valve seat 503 and the balance piston 308 to connect the backwash valve seat 503 and the balance piston 308, and the decapsulation staples 601 of this embodiment are symmetrically distributed.
The specific assembly process of the over-cable water injection packer of this embodiment is as follows:
the rubber cylinder seat 301 is sleeved at the annular groove of the central tube 101, the bottom of the rubber cylinder seat 301 is in threaded connection with the connecting short section 109 through external threads, the bottom of the connecting short section 109 is in threaded connection with the locking ring seat 401 through external threads, and the locking ring 402 is sleeved in the annular locking groove 401-1 of the locking ring seat 401.
A sealing ring with a matched specification is embedded in an inner sealing groove of the upper hydraulic cylinder 102, then the top of the upper hydraulic cylinder 102 is in threaded connection with the locking sleeve 403 through external threads, the assembly is sleeved on the outer circle of the bottom of the central pipe 101, and the assembly is pulled upwards to the connecting short section 109.
Sealing rings with matched specifications are respectively embedded in the inner sealing groove and the outer sealing groove of the upper piston 103, and then the upper piston 103 is in threaded connection with the bottom of the central pipe 101.
A sealing ring with matched specification is embedded in a sealing groove at the small outer diameter part of the hydraulic cylinder seat 104, then the top of the hydraulic cylinder seat 104 is in threaded connection with the bottom of the upper piston 103, and a locking pin is arranged at the connection part of the upper piston 103 and the hydraulic cylinder seat 104 after the upper cable channel 101-1 and the lower cable channel 104-1 are aligned.
A sealing ring with matched specification is embedded in an inner sealing groove of the lower hydraulic cylinder 105, then the sealing ring is sleeved on the outer circle of the bottom of the hydraulic cylinder base 104, and the top of the lower hydraulic cylinder 105 is in threaded connection with the bottom of the upper hydraulic cylinder 102.
Sealing rings with matched specifications are respectively embedded into the inner sealing groove and the outer sealing groove of the lower piston 106, and then the lower piston 106 is in threaded connection with the bottom of the hydraulic cylinder base 104.
A sealing ring with matched specifications is embedded in a sealing groove at the small outer diameter part of the over-cable lower joint 202, an adjusting cap 203 is screwed on the large outer diameter part of the over-cable lower joint 202 in a threaded manner, the assembly is connected with the lower piston 106 in a threaded manner, after a cable channel is aligned with the lower cable hole 202-1, a locking pin is arranged at the threaded connection part, and finally the adjusting cap 203 is adjusted in place and a locking screw 203-1 is arranged.
A setting push ring 107, an edge rubber cylinder I302, a spacer ring I305, a middle rubber cylinder 303, a spacer ring II 306 and an edge rubber cylinder II 304 are sequentially sleeved on the outer cylinder of the rubber cylinder base 301, then a positioning ring 307 is in threaded connection with the outer thread of the rubber cylinder base 301, sealing rings with matched specifications are respectively embedded in inner and outer sealing grooves of a balance piston 308, and then the balance piston 308 is sleeved on the rubber cylinder base 301 and is connected with the outer thread of the positioning ring 307.
A sealing ring with matched specification is embedded in an inner sealing groove of the backwashing valve seat 503, then the sealing ring is sleeved on the rubber barrel seat 301, and the backwashing valve seat 503 is sleeved on the outer circle of the balance piston 308 in a matching way; the backwash valve 502 is sleeved on the large outer circle of the central pipe 101; the bottom of the upper backwash sleeve 501 is threadedly connected to the backwash valve seat 503.
O-shaped rings with matched specifications are respectively embedded in the inner and outer sealing grooves of the cable upper connector 201, then the cable upper connector 201 is sleeved at the top of the central tube 101, after the upper cable hole 201-1 is aligned with the upper cable channel 101-1, the bottom of the cable upper connector 201 is in threaded connection with the upper backwashing sleeve 501, and a locking pin is arranged at the threaded connection position.
Setting shear pins 108 are symmetrically arranged at the joint of the setting push ring 107 and the connecting short section 109, and deblocking shear pins 601 are symmetrically arranged at the joint of the backwashing valve seat 503 and the balance piston 308.
The working principle of the cable-passing water injection packer of the embodiment is as follows:
(1) well flushing operations
Setting: the cable-through water injection packer with a pre-connected cable is connected to a water injection string, hydraulic pressure is applied to an oil pipe after the cable-through water injection packer is lowered to a downhole design position, the hydraulic pressure pushes a backwash valve 502 to move downwards and close (shown in a closed state in fig. 1) through pressure transfer holes (three radial small holes in fig. 1) in a central pipe 101, and simultaneously the hydraulic pressure pushes a two-stage hydraulic cylinder mechanism to move (pushes an upper hydraulic cylinder 102 and a lower hydraulic cylinder 105 to move upwards to drive a lock sleeve 403 and a seat push ring 107 to move upwards in a synchronous manner), specifically, the pressure transfer hole liquid close to an upper connector 201 of the cable pushes the backwash valve 502 to move downwards, and two pressure transfer hole liquids at the bottom respectively enter hydraulic cylinder cavities of the upper hydraulic cylinder 102 and the lower hydraulic cylinder 105 to push the two-stage hydraulic cylinder mechanism to move upwards; when the pressure reaches a certain value, the setting shear pin 108 is sheared, and under the pushing of hydraulic power, the two-stage hydraulic cylinder mechanism continues to move upwards and compresses the side rubber sleeve I302, the middle rubber sleeve 303 and the side rubber sleeve II 304 to seal an oil sleeve annulus (namely an annular space between the underground water injection pipe column and the casing string). After pressure is relieved, a lock ring 402 and a lock sleeve 403 in the locking mechanism enter an occlusion locking state, so that the side rubber sleeve I302, the middle rubber sleeve 303 and the side rubber sleeve II 304 are prevented from rebounding, and setting of the packer is completed.
Backwashing: after the packer is set, the oil and the sleeve are pressed in an empty mode, flushing liquid enters from an upper backwashing hole 501-1 of an upper backwashing sleeve 501, a backwashing valve 502 is pushed to move upwards, a backwashing channel 504 is opened, the flushing liquid flows out through the backwashing channel 504 and a lower backwashing tank 505, enters an oil pipe from the bottom of the pipe column and returns to the ground, and the purpose of backwashing is achieved.
Deblocking: and lifting the pipe column, wherein the friction among the side rubber barrel I302, the middle rubber barrel 303, the side rubber barrel II 304 and the sleeve is kept still, the upper backwashing sleeve 501 and the backwashing valve seat 503 which are connected with the cable upper joint 201 cut the deblocking shear pin 601, and meanwhile, the cable upper joint 201 also drives the central pipe 101 and other components to move upwards, the locking ring seat 401 in the locking mechanism loses support, the locking ring 402 is recovered and loses locking, and the side rubber barrel I302, the middle rubber barrel 303 and the side rubber barrel II 304 rebound, so that the packer deblocking is completed.
(II) logging operations
The cable hole inside the whole water injection packer penetrates into the cable to go into the well, the well logging operation can be implemented except the normal water injection packer well washing operation, and the underground real-time data is transmitted to a ground operation system through the cable for further analysis and research.
It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims (10)

1. The over-cable water injection packer comprises a setting mechanism and a pipe column connecting mechanism, and is characterized in that,
the inner cavity of the setting mechanism is of an equal-diameter structure and is coaxially arranged with the water injection pipe column, and a cable channel is axially penetrated through the setting mechanism;
and a cable hole for a cable to penetrate into/out of is formed in the pipe column connecting mechanism, and the cable hole is communicated with the cable channel and is positioned on the same section.
2. The cable-over-hose water injection packer of claim 1, wherein the setting mechanism comprises:
the pipe wall of the central pipe is provided with an upper cable channel along the axial direction;
the side wall of the hydraulic cylinder base is provided with a lower cable channel along the axial direction, the lower cable channel is communicated with the upper cable channel to form a cable channel, and the inner diameter of the hydraulic cylinder base is equal to that of the central pipe; the tubular column coupling mechanism includes:
the cable-passing upper joint is connected to the top of the central tube, and is provided with an upper cable hole which is communicated with the upper cable channel;
and the upper cable lower connector is connected to the bottom of the hydraulic cylinder seat, and a lower cable hole is formed in the upper cable lower connector and communicated with the lower cable channel.
3. The over-cable water injection packer of claim 2, wherein the setting mechanism further comprises:
setting a push ring;
the upper hydraulic cylinder is sleeved on the central pipe and can be movably arranged along the axial direction of the central pipe;
the upper piston is sleeved on the central pipe and is positioned in the upper hydraulic cylinder, one end of the upper piston is in threaded connection with the central pipe, and the other end of the upper piston is in threaded connection with the hydraulic cylinder seat;
the lower hydraulic cylinder is sleeved on the hydraulic cylinder seat and can move along the axial direction of the hydraulic cylinder seat, the longitudinal section of the lower hydraulic cylinder is of a Z-shaped structure, and the lower hydraulic cylinder is in threaded connection with the upper hydraulic cylinder;
and the lower piston is sleeved on the hydraulic cylinder seat and is positioned in the lower hydraulic cylinder, and the lower piston is in threaded connection with the hydraulic cylinder seat.
4. The cable-over-injection packer of claim 3, further comprising a sealing mechanism, the sealing mechanism comprising:
the rubber cylinder seat is sleeved on the central pipe and is in threaded connection with the connecting short section, the setting push ring is sleeved on the rubber cylinder seat, and the setting push ring is fixed with the connecting short section through symmetrically distributed setting shear pins;
and the rubber cylinder group is sleeved on the rubber cylinder seat and consists of two side rubber cylinders and a middle rubber cylinder positioned between the two side rubber cylinders, and a spacer ring is sleeved between the side rubber cylinders and the middle rubber cylinder.
5. The cable-through water injection packer of claim 4, wherein a positioning ring is threadedly connected to an outer surface of the packing element seat, the positioning ring being disposed in close proximity to the edge packing element;
and the rubber cylinder seat is also sleeved with a balance piston, and the balance piston is in threaded connection with the positioning ring.
6. The cable-over-injection packer of claim 5, further comprising a locking mechanism, the locking mechanism comprising:
the locking ring seat is sleeved on the central pipe and is in threaded connection with the connecting short section, and an annular groove is formed in the outer wall of the locking ring seat;
the locking ring is sleeved on the annular groove, and outer locking teeth are arranged on the outer wall of the locking ring;
the lock sleeve is sleeved on the lock ring seat, one end, far away from the lock ring, of the lock sleeve is in threaded connection with the upper hydraulic cylinder, inner lock teeth are arranged on the inner wall of the lock sleeve and matched with the outer lock teeth, and the inner lock teeth and the outer lock teeth are meshed and locked after the packer is set.
7. The over-cable water injection packer of claim 6, further comprising a backwash mechanism, the backwash mechanism comprising:
the upper backwashing sleeve is in threaded connection with the upper connector of the cable, and is provided with backwashing holes for well washing liquid to enter;
the backwashing valve is sleeved on the central pipe and is positioned in the upper backwashing sleeve, and the backwashing valve can be movably arranged along the axial direction;
the backwashing valve seat is of a Z-shaped structure, one end of the backwashing valve seat is sleeved on the rubber cylinder seat, the other end of the backwashing valve seat is sleeved on the balance piston, and the backwashing valve seat is in threaded connection with the upper backwashing sleeve;
the backwashing channel is formed between the rubber cylinder seat and the central pipe and is of a circular structure, and through holes communicated with the backwashing channel are formed in the rubber cylinder seat, the backwashing valve and the seat seal push ring, so that flushing fluid can enter the backwashing channel or flow out of the backwashing channel;
and the lower backwashing tank is arranged on the lock sleeve and used for allowing the flushing fluid to flow out.
8. The cable-through water injection packer of claim 7, further comprising an unsetting mechanism, the unsetting mechanism comprising:
and the deblocking shear pins penetrate through the joint of the backwashing valve seat and the balance piston and are symmetrically arranged.
9. The cable-through water injection packer of claim 3, wherein the cable-through lower sub is in threaded connection with the lower piston, the cable-through lower sub is further sleeved with an adjustment cap, and the adjustment cap is movably arranged along an axial direction of the cable-through lower sub.
10. The over-cable water injection packer of claim 1, wherein the end of the cable bore is provided with a sealing structure to seal the cable passage from the outside.
CN202121470601.0U 2021-06-30 2021-06-30 Cable-through water injection packer Active CN215672124U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121470601.0U CN215672124U (en) 2021-06-30 2021-06-30 Cable-through water injection packer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121470601.0U CN215672124U (en) 2021-06-30 2021-06-30 Cable-through water injection packer

Publications (1)

Publication Number Publication Date
CN215672124U true CN215672124U (en) 2022-01-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121470601.0U Active CN215672124U (en) 2021-06-30 2021-06-30 Cable-through water injection packer

Country Status (1)

Country Link
CN (1) CN215672124U (en)

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