CN214221129U - Hydraulic patching tubular column for underground screen pipe - Google Patents
Hydraulic patching tubular column for underground screen pipe Download PDFInfo
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- CN214221129U CN214221129U CN202022407012.XU CN202022407012U CN214221129U CN 214221129 U CN214221129 U CN 214221129U CN 202022407012 U CN202022407012 U CN 202022407012U CN 214221129 U CN214221129 U CN 214221129U
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Abstract
The utility model relates to a hydraulic patching tubular column for a well screen pipe, which is provided with a hydraulic anchor, an upper sealing device, a lower sealing device, a patching pipe, a sealing device connecting tubular column and a patching relief valve, wherein the hydraulic anchor is connected with the upper sealing device, the sealing device connecting tubular column and the lower sealing device in sequence, and the patching relief valve is arranged in the sealing device connecting tubular column; the upper sealing device and the lower sealing device are identical in structure and are respectively connected to two ends of the sealing device connecting pipe in opposite directions, and the patching pipe is fixed outside the upper sealing device and the lower sealing device. The utility model discloses a liquid-filling forming mode makes permanent metal shaping between subsidy pipe and the screen pipe, can accomplish the reliable restoration of broken hourglass screen pipe. The patching pipe can be firmly patched on the inner wall of the sieve pipe, and the strength of the sieve pipe patched by the patching pipe after hydraulic forming is enhanced. The inner drift diameter of the screen pipe is large after the patching is finished, the liquid passing is not influenced in the later-stage production, the effective period is long after the patching is finished, and the screen pipe is not only suitable for horizontal wells but also suitable for vertical wells.
Description
Technical Field
The utility model relates to a subsidy equipment of oil gas well screen pipe, especially a screen pipe hydraulic pressure subsidy tubular column in pit.
Background
At present, screen pipe well completion becomes one of the main development modes of horizontal wells, and with continuous development, the proportion of screen pipe well completion casing damage wells is gradually increased due to various measure factors such as high-strength steam injection, formation sand production, corrosion and the like. The casing damage type is mainly the damage of the well completion sieve tube, after the well completion sieve tube is out of work, sand is seriously produced from a shaft, the liquid production amount of an oil well is sharply reduced, the oil and gas well cannot normally produce, meanwhile, underground equipment and ground equipment are seriously abraded, the service life of the equipment is shortened, and the casing damage, the oil well scrapping and the like can be caused in serious cases.
In addition, the sand production leads to sand burying of the pipe column in the well, the pipe column is difficult to salvage by measures such as steam injection and the like, the production of the oil well is stopped, the economic loss is serious, and the high-efficiency development of the oil field is seriously restricted.
The problem of high-efficiency and quick repair of a damaged well casing is always solved by the aid of well completion screen pipe damage treatment. Aiming at the problems of screen pipe breakage, corrosion and perforation, the mature repair technology in the damaged and failed screen pipe is lacked nowadays. At present, the screen pipe damage treatment technology mainly adopts two modes of hanging a small-diameter sand control pipe in a pipe, filling sand control or blocking, sealing and packing temporary production, has the problems of short validity period, small inner drift diameter, quick liquid quantity reduction and the like, and seriously restricts the efficient development of an oil field.
The repair technology in the damaged failure screen pipe mainly takes corrugated pipe repair and expansion pipe repair, and the main working principle is to use cone expansion to flatten the expansion pipe or the corrugated pipe, but the necking is serious at the repair part of the pipe column.
The success rate of corrugated pipe patching in the horizontal well section is low, and the service life of the corrugated pipe after patching is short due to low strength of the corrugated pipe.
The expansion pipe is attached by a supercharger in the well-descending pipe column and a cone-shaped bulging tool connected below the supercharger, and the expansion pipe or the corrugated pipe fixed outside is flattened after the cone therein is expanded.
The corrugated pipe patching and expansion pipe repairing construction is mechanically formed in nature, the patching pipe is difficult to be tightly attached to the inner wall of the sieve pipe, the construction is complex, the cost is high, and the success rate is low. In addition, the existing patching pipe has a large outer diameter and is influenced by the special well body structure of the horizontal well, and the long-section large-diameter patching pipe cannot be smoothly put into the horizontal section, so that the patching requirement of the leakage section of the horizontal section is difficult to meet.
Therefore, the patching device of the screen pipe in the well completion pipe string needs to be improved urgently.
Disclosure of Invention
The utility model aims at providing a screen pipe hydraulic pressure subsidy tubular column in pit overcomes the defect that current subsidy device exists, makes subsidy pipe closely laminate with the screen pipe inner wall, accomplishes the effective restoration at the damaged position of screen pipe inner wall, improves the restoration quality and the construction success rate of screen pipe in the well completion tubular column, improves the exploitation efficiency and the economic benefits of oil gas well.
The utility model adopts the technical scheme as follows:
a hydraulic patching tubular column for a well screen pipe is provided with a hydraulic anchor, an upper sealing device, a lower sealing device, a patching pipe, a sealing device connecting tubular column and a patching relief valve, wherein the hydraulic anchor is sequentially connected with the upper sealing device, the sealing device connecting tubular column and the lower sealing device;
the upper sealing device and the lower sealing device have the same structure and are respectively connected to two ends of the sealing device connecting pipe in opposite directions, and the patching pipe is fixed outside the upper sealing device and the lower sealing device;
the upper sealing device is provided with a central tube, a piston, a rubber cylinder and a rubber cylinder seat, a liquid outlet hole is formed in the tube body of the central tube, the upper end of the central tube is connected with the upper shell of the sealing device, and the lower end of the central tube is sleeved with the lower shell of the sealing device; the lower body of the piston is fixed with an inner lining elastic steel sheet and the lower body of the piston is connected with the lower shell of the sealing device; the rubber cylinder and the rubber cylinder seat are arranged between the upper shell of the sealing device and the lower shell of the sealing device, and the upper return steel sheet and the lower return steel sheet are respectively fixed in the upper shell of the sealing device and the rubber cylinder seat and are positioned outside the rubber cylinder.
The outer wall of the pipe body in the central pipe is a non-equal-diameter outer wall, the liquid outlet hole is formed in the minimum outer diameter position of the central pipe, and a hydraulic cavity is formed between the groove in the minimum outer diameter position and the inner wall of the upper shell of the sealing device.
The lining elastic steel sheet is at least provided with three sheets, two ends of the lining elastic steel sheet are fixed in the lower body of the piston, the lower end of the piston is in threaded connection with the lower shell of the sealing device, and the lower shell of the sealing device is in threaded connection with the connecting pipe column of the sealing device.
And the inner walls of one ends of the upper return steel sheet and the lower return steel sheet are respectively provided with an assembly boss, and one ends provided with the assembly bosses are respectively fixed in the assembly grooves in the upper shell and the rubber cylinder seat of the sealing device in opposite directions.
A gap is formed between the non-fixed end of the upper return steel sheet and the non-fixed end of the lower return steel sheet; the upper return steel sheet and the lower return steel sheet are arranged above three sheets.
And the outer wall of the central tube and the outer wall of the piston which are positioned below the hydraulic cavity are respectively provided with an inner sealing ring and an outer sealing ring.
The upper part and the lower part of the patch pipe are respectively provided with a fixed ring groove, and a fixed ring is arranged in the fixed ring groove; and fixing pins are further arranged in the patching pipes above and below the fixing ring groove, and fix the upper end and the lower end of the patching pipe between the upper shell of the sealing device of the upper sealing device and the upper shell of the sealing device of the lower sealing device respectively by the fixing pins and enable the patching pipe to be positioned outside the upper return steel sheet and the lower return steel sheet of the upper sealing device and the lower sealing device.
The fixing ring is a metal fixing band with engaging bayonets at two ends, ring-shaped clamping teeth are further arranged on the outer surface of the fixing ring, and the fixing ring is installed in a fixing ring groove of the patch tube through the engaging bayonets at the two ends.
The lower end of the lower sealing device is connected with the guide head through an oil pipe or directly connected with the guide head.
The subsidy relief valve is equipped with valve body, inlet channel case, inlet channel return spring, bypass liquid way case, bypass liquid way return spring and pressure release mouth, wherein:
the bypass liquid channel is arranged in the shell wall of the valve body beside the liquid inlet channel, and the bypass liquid channel and the liquid inlet channel are provided with an all-directional patch liquid flow port, a bypass liquid channel liquid inlet and a lower sealing device liquid flow port;
the bypass liquid channel valve core and the bypass liquid channel return spring are arranged at the position of the omnibearing subsidizing liquid flow port of the bypass liquid channel; a liquid inlet channel valve core and a liquid inlet channel return spring are arranged in the liquid inlet channel, and the liquid inlet channel valve core and the liquid inlet channel return spring are arranged at the pressure relief port, the bypass liquid inlet and the liquid flow port of the lower sealing device;
the liquid inlet channel return spring seat is arranged in a partition platform between the liquid inlet channel and the bypass liquid channel, a liquid flow port of the lower sealing device is arranged below the partition platform and communicated with the bypass liquid channel, and a liquid inlet of the bypass liquid channel is arranged in a partition wall between the liquid inlet channel and the bypass liquid channel.
Compared with the prior art, the utility model discloses a show the result of use and lie in:
a hydraulic pump in an aboveground hydraulic pump station supplies liquid for an underground pressurization pipe column, and a hydraulic anchor, an upper sealing device, a subsiding limit valve and a lower sealing device in a hydraulic subsiding pipe column are pressurized by a screw motor in the pressurization pipe column and an underground booster, so that the hydraulic anchor reaches working pressure and then the hydraulic subsiding pipe column is anchored in the inner wall of the sieve pipe. And after continuously pressurizing, sequentially passing through the upper sealing device and the lower sealing device to patch the upper part and the lower part of the patch pipe to the inner wall of the sieve pipe, and finally continuously pressurizing to tightly patch the patch pipe between the upper sealing device and the lower sealing device to the inner wall of the sieve pipe. The patching pipe is made of a hydraulic forming patching material, so that the patching pipe is strong in plasticity and good in patching performance with the inner wall of the sieve pipe, and is large in pressure through hydraulic patching, large in contact area with the sieve pipe and good in patching effect.
The utility model discloses a hydraulic forming material makes the subsidy pipe, adopts the hydromechanical forming mode to make permanent metal shaping between subsidy pipe and the screen pipe. The reliable repair of the broken screen pipe can be completed, the patching pipe can be firmly patched on the inner wall of the screen pipe, and the strength of the screen pipe patched by the patching pipe after hydraulic forming is enhanced. The inner drift diameter of the sieve tube is large after patching is finished, the liquid passing is not influenced in later-stage production, the effective period is long after patching is finished, and the sieve tube is not only suitable for horizontal wells but also suitable for vertical wells, has obvious using effect and can generate obvious economic benefit.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of the working principle of the present invention.
Fig. 2 is a schematic structural view of the upper sealing apparatus of fig. 1.
Fig. 3 is a schematic structural view of the fixing ring in fig. 2 before patching construction.
Fig. 4 is a schematic structural view of the fixing ring of fig. 2 after patch construction.
Fig. 5 is a schematic structural view of the hydraulic patch string of fig. 1.
Fig. 6 is a schematic structural view of the subsidized pressure limiting valve in fig. 5.
In the figure: the device comprises the ground 1, a sieve tube 2, a screw motor 3, a hydraulic anchor 4, an upper sealing device 5, a lower sealing device 6, a guide head 7, a patch tube 8, a fixed ring 9, a downhole supercharger 10, an oil tube 11, an aboveground hydraulic pump station 12, a sealing device connecting pipe column 13, a patch pressure limiting valve 14, a sealing device upper shell 5-1, a liquid outlet 5-2, an outer sealing ring 5-3, an inner sealing ring 5-4, an upper return steel sheet 5-5, an inner lining elastic steel sheet 5-6, a rubber cylinder 5-7, a lower return steel sheet 5-8, a rubber cylinder seat 5-9, a sealing device lower shell 5-10, a piston 5-11, a hydraulic cavity 5-12, a central tube 5-13, a liquid inlet channel 14-1, a bypass liquid channel 14-2, a lower sealing device liquid outlet 14-3, a pressure relief outlet 14-4, 14-5 parts of a liquid inlet channel return spring, 14-6 parts of a valve core sealing ring, 14-7 parts of a liquid inlet channel valve core, 14-8 parts of a valve body, 14-9 parts of a bypass liquid channel return spring, 14-10 parts of a full-range supplementary liquid flow port, 14-11 parts of a valve core sealing ring and 14-12 parts of a bypass liquid channel valve core.
Detailed Description
The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present disclosure. The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 6, a hydraulic patching tubular column of a well screen pipe is provided with a hydraulic anchor 4, an upper sealing device 5, a lower sealing device 6, a patching pipe 8, a sealing device connecting tubular column 13 and a patching pressure relief valve 14, wherein the hydraulic anchor 4 is sequentially connected with the upper sealing device 5, the sealing device connecting tubular column 13 and the lower sealing device 6, and the patching pressure relief valve 14 is arranged in the sealing device connecting tubular column 13;
the upper sealing device 5 and the lower sealing device 6 have the same structure and are respectively connected to two ends of a sealing device connecting pipe 13 in opposite directions, and the patch pipe 8 is fixed outside the upper sealing device 5 and the lower sealing device 6;
the structure of the sealing device 5 is described by taking the sealing device 5 as an example, the upper sealing device 5 is provided with a central tube 5-13, a piston 5-11, a rubber cylinder 5-7 and a rubber cylinder seat 5-9, a liquid outlet 5-2 is arranged on a tube body of the central tube 5-13, the upper end of the central tube 5-13 is connected with an upper shell 5-1 of the sealing device, and the lower end is sleeved with a lower shell 5-10 of the sealing device; the lower body of the piston 5-11 is fixed with an inner lining elastic steel sheet 5-6, and the lower body of the piston 5-11 is connected with the lower shell 5-10 of the sealing device; the rubber cylinder 5-7 and the rubber cylinder seat 5-9 are arranged between the upper shell 5-1 of the sealing device and the lower shell 5-10 of the sealing device, and the upper return steel sheet 5-5 and the lower return steel sheet 5-8 are respectively fixed in the upper shell 5-1 of the sealing device and the rubber cylinder seat 5-9 and are positioned outside the rubber cylinder 5-7. Be equipped with screw motor 3, oil pipe 11 and booster 10 in the pressure boost tubular column in the pit, set up and be connected with pressure boost tubular column in the pit through hydraulic pressure pipeline at 1 aboveground hydraulic power unit 12 on ground, the utility model discloses connect the below at pressure boost tubular column.
The hydraulic pump station 12 is arranged on the ground 1, the hydraulic pump station 12 is a general hydraulic pump on the well, and the working medium is drilling fluid. The hydraulic patching tubular column is connected at the lower end of the pressurizing tubular column, and the pressurizing tubular column and the hydraulic patching tubular column are placed at the damaged position of the sieve tube 2 through the workover rig. The oil pipe 11, the screw motor 3 and the downhole booster 10 in the booster string are common devices. The hydraulic power is provided for the pressurizing pipe column and the hydraulic patching pipe column by the hydraulic pump station 12 on the well, the screw motor 3 is driven by the oil pipe 11 to rotate so as to pressurize the booster 10 in the well, and the hydraulic anchor 4 is fixed in the inner wall of the sieve pipe 2 after expanding. After the pressurization is continued, the sealing device is connected with the subsiding pressure limiting valve 14 in the pipe column 13 to control the hydraulic pressure, the upper sealing device 5 and the lower sealing device 6 are sequentially expanded, the subsiding pipe 8 is fixed on the inner wall of the sieve pipe 2, and the subsiding operation of the damaged sieve pipe 2 is completed.
On the basis of the first embodiment, the utility model discloses still have following embodiment:
the outer wall of the tube body in the central tube 5-13 is a non-equal-diameter outer wall, the liquid outlet hole 5-2 is arranged at the minimum outer diameter position of the central tube 5-13, and a hydraulic cavity 5-12 is formed between the groove at the minimum outer diameter position and the inner wall of the upper shell 5-1 of the sealing device.
The lining elastic steel sheets 5-6 are at least provided with three sheets, two ends of the lining elastic steel sheets are fixed in the lower body of the piston 5-11, the lower end of the piston 5-11 is in threaded connection with the lower shell 5-10 of the sealing device, and the lower shell 5-10 of the sealing device is in threaded connection with the connecting pipe column 13 of the sealing device.
The inner walls of one ends of the upper return steel sheet 5-5 and the lower return steel sheet 5-8 are respectively provided with an assembly boss, and the ends provided with the assembly bosses are respectively fixed in the assembly grooves in the upper shell 5-1 and the rubber cylinder seat 5-9 of the sealing device in opposite directions.
A gap is formed between the non-fixed end of the upper return steel sheet 5-5 and the non-fixed end of the lower return steel sheet 5-8 so as to facilitate the expansion of the rubber cylinder 5-7; the upper return steel sheet 5-5 and the lower return steel sheet 5-8 are both arranged on more than three sheets.
And the outer wall of the central pipe 5-13 and the outer wall of the piston 5-11 which are positioned below the hydraulic cavity 5-12 are respectively provided with an inner sealing ring 5-4 and an outer sealing ring 5-3.
The patch pipe 8 is made of a hydraulic forming patch material, the upper part and the lower part of the patch pipe 8 are respectively provided with a fixed ring groove, and a fixed ring 9 is arranged in the fixed ring groove; fixing pins are further arranged in the patch tubes 8 above and below the fixing ring groove, the fixing pins fix the upper ends and the lower ends of the patch tubes 8 between the sealing device upper shell 5-1 of the upper sealing device 5 and the sealing device upper shell 5-1 of the lower sealing device 6 respectively, and the patch tubes 8 are located outside the upper return steel sheets 5-5 and the lower return steel sheets 5-8 of the upper sealing device 5 and the lower sealing device 6. The fixing pin can guarantee that the hydraulic patching pipe column is fixed by the patching pipe 8 in the lowering process, and the fixing ring 9 can assist the patching pipe 8 to be more tightly attached to the inner wall of the sieve pipe 2. The hydroformed patch materials from which the patch tube 8 can be made are 304L stainless steel, 321 stainless steel, and 316 stainless steel. When the drilling fluid from an aboveground hydraulic pump station 12 and pressurized by an underground booster 10 firstly enters a hydraulic cavity 5-12 of an upper sealing device 5 and pushes a piston 5-11 downwards, under the control of a lower shell 5-10 and a patch pressure limiting valve 14 of the sealing device, the hydraulic pressure sequentially pushes an inner lining elastic steel sheet 5-6, a rubber cylinder 5-7, an upper return steel sheet 5-5, a lower return steel sheet 5-8 and a patch pipe 8 into the inner wall of a screen pipe 2 to be attached tightly.
The fixing ring 9 is a metal fixing band with engaging bayonets at two ends, ring-shaped clamping teeth are further arranged on the outer surface of the fixing ring, and the fixing ring is installed in a fixing ring groove of the patch tube 8 through the engaging bayonets at two ends; the fixing ring 9 is made of a metal material with the elongation rate of more than or equal to 30% and the yield stress of less than 50MPa, and ring-shaped latch on the outer surface of the fixing ring 9 is hardened. The fixing ring 9 is a flexible metal seal ring with ductility, and the metal capable of making the fixing ring 9 comprises red copper, lead, pure aluminum and the like. The fixing ring groove part of the patch tube 8 is contracted and then is arranged in the fixing ring 9. When the screen pipe is hydroformed, the screen pipe deforms under the action of pressure, the ring-shaped clamping teeth outside the fixing ring 9 increase the contact area and the strength with the inner wall of the screen pipe 2, and the patch pipe 8 can be better attached and fixed in the inner wall of the screen pipe 2.
The lower end of the lower sealing device 6 is connected with the seeker 7 through the oil pipe 11 or directly connected with the seeker 7, which is convenient in the utility model discloses the lower of the well hydraulic pressure subsidy tubular column.
The subsidy relief valve 14 is provided with a valve body 14-8, a liquid inlet channel 14-1, a liquid inlet channel valve core 14-7, a liquid inlet channel return spring 14-5, a bypass liquid channel 14-2, a bypass liquid channel valve core 14-12, a bypass liquid channel return spring 14-9 and a pressure relief opening 14-4, wherein:
the bypass liquid channel 14-2 is arranged in the shell wall of the valve body 14-8 beside the liquid inlet channel 14-1, and the bypass liquid channel 14-2 and the liquid inlet channel 14-1 are provided with an omnibearing patch liquid flow port 14-10, a bypass liquid channel liquid inlet and a lower sealing device liquid flow port 14-3;
a bypass liquid channel valve core 14-12 and a bypass liquid channel return spring 14-9 are arranged at the position of an omnibearing supplement liquid flow port 14-10 of a bypass liquid channel 14-2; a liquid inlet channel valve core 14-7 and a liquid inlet channel return spring 14-5 are arranged in the liquid inlet channel 14-1, and the liquid inlet channel valve core 14-7 and the liquid inlet channel return spring 14-5 are arranged at the positions of the pressure relief port 14-4, a liquid inlet of the bypass liquid channel and a liquid flow port 14-3 of the lower sealing device;
the liquid inlet channel return spring 14-5 is positioned in a partition table between the liquid inlet channel 14-1 and the bypass liquid channel 14-2, the liquid flow port 14-3 of the lower sealing device is positioned below the partition table and communicated with the bypass liquid channel 14-2, and the liquid inlet of the bypass liquid channel is arranged in a partition wall between the liquid inlet channel 14-1 and the bypass liquid channel 14-2.
A first valve core sealing ring 14-6 is arranged outside the valve core 14-7 of the liquid inlet channel, and a second valve core sealing ring 14-11 is arranged outside the valve core 14-12 of the bypass liquid channel.
Liquid from the upper pipe column enters the subsidy pressure limiting valve 14 from the liquid inlet channel 14-1, after the pressure is increased to the opening pressure of the subsidy pressure limiting valve 14, the valve core 14-7 of the liquid inlet channel goes downwards against the elastic force of the return spring 14-5 of the liquid inlet channel, and the liquid enters the liquid inlet 14-3 of the lower sealing device and the bypass liquid channel 14-2, so that the lower sealing device 6 works. Along with the continuous rising of the pressure, the elasticity of a bypass liquid channel return spring 14-9 is overcome, a bypass liquid channel valve core 14-12 goes upwards to be opened, liquid enters a space formed by an upper sealing device 5, a patch pipe 8 and a lower sealing device 6 from an all-round patch liquid inlet 14-10, the middle pipe body of the patch pipe 8 deforms and expands and is attached to the inner wall of the sieve pipe 2, and the damaged part of the sieve pipe 2 is attached and repaired.
The screw motor 3 of the present invention can use the screw motors of 7LZ73 × 7.0 and 9LZ79 × 7.0L models. The downhole booster 10 can use a dual helical groove screw motor downhole booster, a screw reversing screw motor downhole booster, and a 2JZ7 model downhole booster.
A construction method of a hydraulic patching tubular column of a well screen pipe comprises the following steps:
A. firstly, connecting a hydraulic patching tubular column to the lower end of a pressurizing tubular column, and descending the hydraulic patching tubular column into a well through a well repairing operation machine to enable the hydraulic patching tubular column to be positioned at the damaged position of a sieve tube 2;
B. hydraulic pressure in the well at the surface 1Pump and method of operating the sameThe hydraulic pump in the station 12 is connected to the hydraulic lineOil pipes 11 in the booster string are communicated;
C. open hydraulic pressure above wellPump and method of operating the sameA hydraulic pump in the station 12 boosts the working pressure of the drilling fluid to a hydraulic anchor 4 through a screw motor 3 and a downhole booster 10, and anchors a hydraulic patch pipe column in the inner wall of the sieve pipe 2;
D. continuously pressurizing the drilling fluid to the working pressure of the upper sealing device 5 through a hydraulic pump in an aboveground hydraulic pump station 12, the screw motor 3 and the underground supercharger 10, so that the rubber cylinders 5-7 are expanded, and the upper parts of the patching pipes 8 and the fixing rings 9 are tightly attached to the inner wall of the sieve pipe 2;
E. continuously pressurizing the drilling fluid to the opening pressure of the subsidy pressure limiting valve 14 and continuously pressurizing to the working pressure of the lower sealing device 6 through a hydraulic pump, a screw motor 3 and a downhole booster 10 in an aboveground hydraulic pump station 12, so that rubber cylinders 5-7 in the lower sealing device 6 are expanded, and the lower part of the subsidy pipe 8 and the fixing ring 9 are attached to the inner wall of the sieve pipe 2;
F. the patching limiting valve 14 keeps an opening state, and the drilling fluid is continuously pressurized, so that the middle pipe body of the patching pipe 8 deforms and expands and is tightly attached to the inner wall of the screen pipe 2, and the damaged part of the screen pipe 2 is tightly repaired;
J. and after the screen pipe 2 is attached, closing the hydraulic pump in the hydraulic pump station 12 on the well. The pressure in the pressurizing pipe column and the hydraulic patch pipe column is reduced, the upper sealing device 5 automatically releases the pressure, the liquid inlet channel valve core 14-7 of the patch pressure limiting valve 14 is reset to move upwards under the action of the liquid inlet channel return spring 14-5, the bottom pressure release port 14-4 of the valve seat of the patch pressure limiting valve 14 is communicated with the outside, the lower sealing device 6 finishes the pressure release, and the liquid in the patch pipe 8 naturally releases the pressure.
After the drilling fluid is decompressed, pistons 5-11 in an upper sealing device 5 and a lower sealing device 6 return under the action of lining elastic steel sheets 5-6, a rubber cylinder 5-7 returns under the action of the upper return steel sheets 5-5 and the lower return steel sheets 5-8, and a hydraulic patching tubular column and a pressurizing tubular column are lifted to the ground 1.
In the utility model, the upper end of the upper casing 5-1 of the sealing device of the upper sealing device 5 in the hydraulic patch tubular column is connected with the casing thread of the hydraulic anchor 4, and the lower end of the lower casing 5-10 of the sealing device is connected with the sealing device connecting tubular column 13 in a thread connection. When the screen pipe works, high-pressure drilling fluid pushes the piston 5-11 to move downwards, the piston 5-11 presses the lining elastic steel sheet 5-6 to expand and deform, the lining elastic steel sheet 5-6 supports the rubber sleeve 5-7 to expand and deform, the upper part of the patching pipe 8 is expanded and is attached to the inner wall of the screen pipe 2 in a sealing mode, and the upper return steel sheet 5-5 and the lower return steel sheet 5-8 outside the rubber sleeve 5-7 support the upper end and the lower end of the rubber sleeve 5-7 to prevent deformation. After the work is finished and the pressure is relieved, the upper return steel sheet 5-5 and the lower return steel sheet 5-8 outside the rubber cylinder 5-7 can reset the rubber cylinder 5-7.
The upper end of the sealing device connecting pipe column 13 is in threaded connection with the lower sealing device shell 5-10 of the upper sealing device 5, the lower end of the sealing device connecting pipe column is in threaded connection with the upper sealing device shell 5-1 of the lower sealing device 6, and the patch pipe 8 is fixed outside the upper sealing device 5 and the lower sealing device 6 through fixing pins. When the device works, the patch tube 8 expands and deforms, and the fixing pin automatically breaks under the action of tension, so that the device is separated from the patch tube 8.
The lower sealing device shell 5-10 of the lower sealing device 6 is in threaded connection with a sealing device connecting pipe column 13. When the screen pipe works, high-pressure drilling fluid pushes the piston 5-11 to move upwards, the piston 5-11 compresses the lining elastic steel sheet 5-6 to expand and deform, the lining elastic steel sheet 5-6 supports the rubber sleeve 5-7 to expand and deform, and the lower part of the patching pipe 8 is expanded and is attached to the inner wall of the screen pipe 2 in a sealing mode. The upper return steel sheet 5-5 and the lower return steel sheet 5-8 outside the rubber cylinder 5-7 support the upper end and the lower end of the rubber cylinder 5-7 to prevent deformation, and after the work is finished and the pressure is relieved, the upper return steel sheet 5-5 and the lower return steel sheet 5-8 can reset the rubber cylinder 5-7.
The upper end of the guide head 7 is in threaded connection with the upper shell 5-1 of the sealing device in the lower sealing device 6 through an oil pipe 11 or directly, and plays a role in guiding and righting in the lowering process of the hydraulic patch pipe column.
The embodiments described above are merely exemplary embodiments, but the present invention is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and teaching of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications can be made, and equivalents can be substituted for elements thereof. Any modification, equivalent replacement, improvement and the like made within the spirit and the concept of the present invention should be included in the protection scope of the present invention. The scope of protection is therefore not limited to the description above.
Claims (10)
1. A hydraulic patching tubular column of a well screen pipe is characterized by being provided with a hydraulic anchor, an upper sealing device, a lower sealing device, a patching pipe, a sealing device connecting tubular column and a patching relief valve, wherein the hydraulic anchor is sequentially connected with the upper sealing device, the sealing device connecting tubular column and the lower sealing device, and the patching relief valve is arranged in the sealing device connecting tubular column;
the upper sealing device and the lower sealing device have the same structure and are respectively connected to two ends of the sealing device connecting pipe in opposite directions, and the patching pipe is fixed outside the upper sealing device and the lower sealing device; the upper sealing device is provided with a central tube, a piston, a rubber cylinder and a rubber cylinder seat, a liquid outlet hole is formed in the tube body of the central tube, the upper end of the central tube is connected with the upper shell of the sealing device, and the lower end of the central tube is sleeved with the lower shell of the sealing device; the lower body of the piston is fixed with an inner lining elastic steel sheet and the lower body of the piston is connected with the lower shell of the sealing device; the rubber cylinder and the rubber cylinder seat are arranged between the upper shell of the sealing device and the lower shell of the sealing device, and the upper return steel sheet and the lower return steel sheet are respectively fixed in the upper shell of the sealing device and the rubber cylinder seat and are positioned outside the rubber cylinder.
2. The tubular string for hydraulic patching of screen pipe in well as recited in claim 1, wherein the outer wall of the tubular body in the central tube is a non-constant diameter outer wall, the fluid outlet hole is provided at the minimum outer diameter of the central tube and a hydraulic chamber is formed between the groove at the minimum outer diameter and the inner wall of the upper casing of the sealing device.
3. The tubular column of claim 1, wherein the inner lining steel plate has at least three pieces and two ends fixed in the lower body of the piston, the lower end of the piston is connected with the lower casing of the sealing device by screw thread, and the lower casing of the sealing device is connected with the connecting tubular column of the sealing device by screw thread.
4. The tubular column for hydraulic patching of screen pipe in well as recited in claim 1, wherein the inner wall of one end of the upper return steel sheet and the lower return steel sheet is provided with an assembling boss and the end provided with the assembling boss is fixed in the assembling groove of the upper shell and the rubber cylinder seat of the sealing device respectively in opposite directions.
5. The hydraulic patch tubular column of claim 1 or 4, wherein a gap is formed between the non-fixed end of the upper return steel sheet and the non-fixed end of the lower return steel sheet; the upper return steel sheet and the lower return steel sheet are arranged above three sheets.
6. The tubular screen pipe hydraulic patch as claimed in claim 2, wherein the outer wall of the center tube and the outer wall of the piston below the hydraulic chamber are provided with an inner seal ring and an outer seal ring, respectively.
7. The hydraulic patch tubular column of claim 1, wherein the patch tube has a retainer groove in which a retainer is installed at each of the upper and lower portions thereof; and fixing pins are further arranged in the patching pipes above and below the fixing ring groove, and fix the upper end and the lower end of the patching pipe between the upper shell of the sealing device of the upper sealing device and the upper shell of the sealing device of the lower sealing device respectively by the fixing pins and enable the patching pipe to be positioned outside the upper return steel sheet and the lower return steel sheet of the upper sealing device and the lower sealing device.
8. The hydraulic patch string of claim 7, wherein the retainer is a metal retainer with engaging bayonets at both ends, and the outer surface of the retainer is further provided with ring-shaped latches and is fitted into the retainer groove of the patch tube through the engaging bayonets at both ends.
9. The well screen hydraulic patch as recited in claim 1 wherein the lower end of the lower seal assembly is connected to the guide head through tubing or directly to the guide head.
10. The hydraulic patching tubular column of the well screen pipe as claimed in claim 1, wherein the patching relief valve is provided with a valve body, a liquid inlet channel valve core, a liquid inlet channel return spring, a bypass liquid channel valve core, a bypass liquid channel return spring and a pressure relief opening, wherein:
the bypass liquid channel is arranged in the shell wall of the valve body beside the liquid inlet channel, and the bypass liquid channel and the liquid inlet channel are provided with an all-directional patch liquid flow port, a bypass liquid channel liquid inlet and a lower sealing device liquid flow port;
the bypass liquid channel valve core and the bypass liquid channel return spring are arranged at the position of the omnibearing subsidizing liquid flow port of the bypass liquid channel; a liquid inlet channel valve core and a liquid inlet channel return spring are arranged in the liquid inlet channel, and the liquid inlet channel valve core and the liquid inlet channel return spring are arranged at the pressure relief port, the bypass liquid inlet and the liquid flow port of the lower sealing device;
the liquid inlet channel return spring seat is arranged in a partition platform between the liquid inlet channel and the bypass liquid channel, a liquid flow port of the lower sealing device is arranged below the partition platform and communicated with the bypass liquid channel, and a liquid inlet of the bypass liquid channel is arranged in a partition wall between the liquid inlet channel and the bypass liquid channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022407012.XU CN214221129U (en) | 2020-10-27 | 2020-10-27 | Hydraulic patching tubular column for underground screen pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022407012.XU CN214221129U (en) | 2020-10-27 | 2020-10-27 | Hydraulic patching tubular column for underground screen pipe |
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| Publication Number | Publication Date |
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| CN214221129U true CN214221129U (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022407012.XU Active CN214221129U (en) | 2020-10-27 | 2020-10-27 | Hydraulic patching tubular column for underground screen pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236172A (en) * | 2021-06-09 | 2021-08-10 | 中国石油大学(华东) | Down-hole screen pipe hydraulic forming patching tool and method |
| CN114293928A (en) * | 2021-12-28 | 2022-04-08 | 辽宁石油化工大学 | Underground stable joint for plugging operation |
-
2020
- 2020-10-27 CN CN202022407012.XU patent/CN214221129U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236172A (en) * | 2021-06-09 | 2021-08-10 | 中国石油大学(华东) | Down-hole screen pipe hydraulic forming patching tool and method |
| CN113236172B (en) * | 2021-06-09 | 2022-05-17 | 中国石油大学(华东) | Down-hole screen pipe hydraulic forming patching tool and method |
| CN114293928A (en) * | 2021-12-28 | 2022-04-08 | 辽宁石油化工大学 | Underground stable joint for plugging operation |
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