CN114482894B - Hydraulic forming and repairing system for well screen pipe and construction method thereof - Google Patents
Hydraulic forming and repairing system for well screen pipe and construction method thereof Download PDFInfo
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- CN114482894B CN114482894B CN202011159379.2A CN202011159379A CN114482894B CN 114482894 B CN114482894 B CN 114482894B CN 202011159379 A CN202011159379 A CN 202011159379A CN 114482894 B CN114482894 B CN 114482894B
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- screen
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- 238000010276 construction Methods 0.000 title abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 175
- 239000007788 liquid Substances 0.000 claims abstract description 117
- 229910000831 Steel Inorganic materials 0.000 claims description 59
- 239000010959 steel Substances 0.000 claims description 59
- 239000012530 fluid Substances 0.000 claims description 35
- 238000005553 drilling Methods 0.000 claims description 20
- 238000000926 separation method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000008439 repair process Effects 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 238000010793 Steam injection (oil industry) Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010964 304L stainless steel Substances 0.000 description 1
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 206010035148 Plague Diseases 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
Abstract
The invention relates to a hydraulic forming patching system of a well screen pipe and a construction method thereof, wherein the patching system comprises a pressurizing pipe column, an oil pipe and a downhole pressurizer are arranged in the pressurizing pipe column, and an uphole hydraulic pump station arranged on the ground is connected with the downhole pressurizing pipe column through a hydraulic pipeline; a screw motor is connected between an oil pipe in the pressurizing pipe column and the underground pressurizer, and a hydraulic patch pipe column is connected below the pressurizing pipe column; the hydraulic pressure patch pipe column is provided with a hydraulic anchor, an upper sealing device, a lower sealing device, a patch pipe, a sealing device connecting pipe column and a patch pressure limiting valve, wherein the hydraulic anchor is sequentially connected with the upper sealing device, the sealing device connecting pipe column and the lower sealing device, and the patch pressure limiting valve is arranged in the sealing device connecting pipe column. The inner diameter of the screen pipe is large after the patch is finished, the liquid amount is not influenced in the later production, the effective period is long after the patch is finished, and the screen pipe is not only suitable for a horizontal well, but also suitable for a vertical well, has obvious use effect and can generate obvious economic benefit.
Description
Technical Field
The invention relates to repairing equipment and a construction method of a screen pipe of an oil-gas well in the petroleum industry, in particular to a hydraulic forming repairing system of a screen pipe in a well and a construction method thereof.
Background
At present, screen pipe well completion has become one of the main development modes of horizontal wells, and with the continuous deep development, the casing damage proportion of screen pipe well completion is gradually increased due to various measure factors such as high-strength steam injection, layer sand production, corrosion and the like. The casing damage type is mainly based on the damage of a well completion screen pipe, after the well completion screen pipe fails, the well bore seriously produces sand, so that the liquid production amount of an oil well is rapidly reduced, an oil gas well cannot be produced normally, underground and ground equipment is seriously worn, the service life of the equipment is shortened, and the casing is damaged, the oil well is scrapped and the like.
In addition, sand is buried in the inner pipe column of the well, so that the pipe column is difficult to salvage in measures such as steam injection, production stopping of the oil well is caused, economic loss is serious, and efficient development of the oil field is severely restricted.
Well completion screen pipe damage management is always a difficult problem which plagues efficient and rapid repair of casing damage wells. Aiming at the problems of screen pipe rupture and corrosion perforation, the technology of repairing inside of the screen pipe with mature damaged and invalid screen pipe is lacking nowadays. At present, the screen pipe breakage treatment technology mainly adopts two modes of filling sand prevention or blocking and sealing temporary production of a small-diameter sand prevention pipe suspended in a pipe, has the problems of short effective period, small inner drift diameter, quick liquid quantity reduction and the like, and severely restricts the efficient development of an oil field.
The technology for repairing damaged and invalid sieve tube is mainly characterized by repairing corrugated tube and repairing expansion tube, and mainly adopts cone expansion to flatten expansion tube or corrugated tube, but the necking is serious at the repairing position of the tubular column.
The success rate of the corrugated pipe patch in the horizontal well section is low, and the service life of the patch is short due to the low strength of the corrugated pipe.
The expansion pipe is complemented by a booster in the well string and a cone-shaped bulging tool connected below the booster, and the expansion pipe or the corrugated pipe fixed outside is flattened after the cone is expanded.
The corrugated pipe repairing and expansion pipe repairing construction is mechanical forming in nature, so that the repairing pipe and the inner wall of the sieve tube are difficult to be tightly attached, the construction is complex, the cost is high, and the success rate is low. In addition, the outer diameter of the existing patch pipe is larger, the existing patch pipe is influenced by the special well structure of the horizontal well, the long-section large-diameter patch pipe cannot be smoothly put into the horizontal section, and the patch requirement of the broken and leaking section of the horizontal section is difficult to meet.
For this reason, there is an urgent need for improvements in screen repair apparatus and construction methods in completion strings.
Disclosure of Invention
The invention aims to provide a hydraulic forming patch system of a well screen pipe and a construction method thereof, which overcome the defects of the existing patch device, enable a patch pipe to be tightly attached to the inner wall of the screen pipe, complete effective repair of the damaged part of the inner wall of the screen pipe, improve repair quality and construction success rate of the screen pipe in a well completion pipe column, and improve exploitation efficiency and economic benefit of an oil-gas well.
The technical scheme adopted by the invention is as follows: the utility model provides a well screen pipe hydroforming subsidy system includes the booster column, is equipped with oil pipe and booster in the booster column in the pit, and the aboveground hydraulic power unit of setting passes through hydraulic pressure pipeline and is connected with booster column in the pit, wherein:
a screw motor is connected between an oil pipe in the pressurizing pipe column and the underground pressurizer; the lower part of the pressurizing pipe column is connected with a hydraulic patch pipe column; the hydraulic pressure patch pipe column is provided with a hydraulic anchor, an upper sealing device, a lower sealing device, a patch pipe, a sealing device connecting pipe column and a patch pressure limiting valve, wherein the hydraulic anchor is sequentially connected with the upper sealing device, the sealing device connecting pipe column and the lower sealing device, and the patch pressure limiting valve is arranged in the sealing device connecting pipe column; the upper sealing device and the lower sealing device have the same structure and are respectively connected to the two ends of the connecting pipe column of the sealing device in opposite directions, and the patch 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 internally fixed with an elastic steel sheet lining, and the lower end 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 tube body in the central tube is a non-constant diameter outer wall, the liquid outlet hole is arranged at the minimum outer diameter of the central tube, and a hydraulic cavity is formed between a groove at the minimum outer diameter and the inner wall of the upper shell of the sealing device.
The lining elastic steel sheet is at least provided with three pieces, 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.
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 assembly grooves in the upper shell of the sealing device and the rubber cylinder seat in opposite directions.
A gap is arranged between the unfixed end of the upper return steel sheet and the unfixed end of the lower return steel sheet; the upper return steel sheet and the lower return steel sheet are arranged on more than three pieces.
And an inner sealing ring and an outer sealing ring are respectively arranged on the outer wall of the central tube and the outer wall of the piston which are positioned below the hydraulic cavity.
The patch tube is made of a hydraulic forming patch material, the upper part and the lower part of the patch tube are respectively provided with a fixed ring groove, and fixed rings are arranged in the fixed ring grooves; fixing pins are further arranged in the patch tubes above and below the fixing ring grooves, the fixing pins fix the upper ends and the lower ends of the patch tubes between the upper sealing device shell of the upper sealing device and the upper sealing device shell of the lower sealing device respectively, and the patch tubes are located outside the upper return steel sheets and the lower return steel sheets of the upper sealing device and the lower sealing device respectively.
The fixing ring is a metal fixing belt with meshing bayonets at two ends, ring-shaped clamping teeth are further arranged on the outer surface of the fixing ring, and the fixing ring is arranged in a fixing ring groove of the patch tube through the meshing bayonets at two ends; the fixing ring is made of a metal material with the elongation more than or equal to 30% and the yield stress less than 50MPa, and ring-shaped teeth on the outer surface of the fixing ring are subjected to hardening treatment.
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 patch pressure limiting 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 internally provided with an omnibearing patch liquid flow port, a bypass liquid channel liquid inlet and a lower sealing device liquid flow port; the bypass fluid passage valve core and the bypass fluid passage return spring are arranged at the position of the omnibearing fluid supplementing port of the bypass fluid passage; 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 positions of the pressure relief opening, the bypass liquid channel liquid inlet opening and the liquid flow opening of the lower sealing device; the liquid inlet channel return spring seat is arranged in a separation table between the liquid inlet channel and the bypass liquid channel, the liquid flow port of the lower sealing device is arranged below the separation table and communicated with the bypass liquid channel, and the liquid inlet of the bypass liquid channel is arranged in a partition wall between the liquid inlet channel and the bypass liquid channel. The valve core sealing ring I is arranged outside the valve core of the liquid inlet channel, and the valve core sealing ring II is arranged outside the valve core of the bypass liquid channel.
A method of constructing a well screen hydroforming patch system, comprising the steps of: A. firstly, connecting a hydraulic patch pipe column at the lower end of a pressurizing pipe column, and lowering the hydraulic patch pipe column into a well through a well repairing operation machine, wherein the hydraulic patch pipe column is positioned at the damaged position of a screen pipe; B. the hydraulic pump in the hydraulic pump station on the well is communicated with an oil pipe in the booster pipe column through a hydraulic pipeline on the ground; C. starting a hydraulic pump in an aboveground hydraulic pump station, pressurizing drilling fluid to the working pressure of a hydraulic anchor through a screw motor and a downhole booster, and anchoring a hydraulic patch pipe column in the inner wall of the sieve tube; D. the hydraulic pump, the screw motor and the downhole booster in the hydraulic pump station continue to boost the drilling fluid to the working pressure of the upper sealing device, so that the rubber cylinder is expanded to tightly attach the upper part of the patch pipe together with the fixing ring to the inner wall of the sieve tube; E. the hydraulic pump, the screw motor and the downhole booster in the hydraulic pump station on the well continuously boost the drilling fluid to the opening pressure of the patch pressure limiting valve and continuously boost the drilling fluid to the working pressure of the lower sealing device, so that the rubber cylinder in the lower sealing device swells and the lower part of the patch pipe and the fixing ring are tightly attached to the inner wall of the sieve tube; F. the patch limiting valve is kept in an open state, drilling fluid is continuously pressurized, so that the middle pipe body of the patch pipe is deformed and swelled and is tightly attached to the inner wall of the screen pipe, and the damaged part of the screen pipe is tightly attached and repaired; J. and after the screen pipe patch is completed, closing the hydraulic pump in the hydraulic pump station on the well.
Compared with the prior art, the invention has the remarkable use effects that: the hydraulic pump in the hydraulic pump station on the well supplies liquid for the underground pressurizing pipe column, and pressurizes the hydraulic anchor and the upper sealing device, the repairing limit valve and the lower sealing device in the hydraulic repairing pipe column through the screw motor and the underground pressurizer in the pressurizing pipe column, so that the hydraulic anchor is anchored in the inner wall of the sieve tube after reaching the working pressure. And after the pressurization is continued, the upper part and the lower part of the patch pipe are patched to the inner wall of the sieve tube through the upper sealing device and the lower sealing device in sequence, and finally, the pressurization is continued to paste the patch pipe between the upper sealing device and the lower sealing device to the inner wall of the sieve tube. The patch tube is made of hydraulic forming patch material, so that the patch tube has strong plasticity and good bonding performance with the inner wall of the screen tube, and the pressure of hydraulic patch is high, the contact area between the patch tube and the screen tube is large, and the patch effect is good.
The invention prepares the patch pipe by hydraulic forming material, and adopts a liquid filling forming mode to form permanent metal between the patch pipe and the sieve tube. The repairing pipe can be firmly repaired on the inner wall of the sieve tube, and the strength of the sieve tube repaired by the repairing pipe after hydroforming is enhanced. The inner diameter of the screen pipe is large after the patch is finished, the liquid amount is not influenced in the later production, the effective period is long after the patch is finished, and the screen pipe is not only suitable for a horizontal well, but also suitable for a vertical well, has obvious use 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 the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
fig. 1 is a schematic diagram of the working principle of the present invention.
Fig. 2 is a schematic view of the structure of the upper sealing device in fig. 1.
Fig. 3 is a schematic structural diagram of the retainer ring patch of fig. 2 prior to construction.
Fig. 4 is a schematic structural view of the retainer ring of fig. 2 after patch construction.
Fig. 5 is a schematic view of the hydraulic patch column of fig. 1.
Fig. 6 is a schematic structural view of the patch pressure limiting valve of fig. 5.
In the figure: the hydraulic pressure pipe comprises a ground 1, a screen pipe 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 pipe 8, a fixed ring 9, a downhole booster 10, an oil pipe 11, an uphole 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, a 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 pipe 5-13, a liquid inlet channel 14-1, a bypass liquid channel 14-2, a lower sealing device liquid flow port 14-3, a pressure relief port 14-4, a liquid inlet channel return spring 14-5, a valve core sealing ring first 14-6, a sealing ring channel valve core 14-7, a valve body 14-8, a bypass liquid channel return spring 14-9, an all-around patch liquid flow port 14-10, a valve core second 14-11 and a valve core 14-12.
Detailed Description
The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present invention. The technical solutions 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 will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should 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 the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, in the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 to 5, a screen hydroforming patch system comprises a booster column in which an oil pipe 11 and a downhole booster 10 are provided, and an uphole hydraulic pump station 12 provided on the ground 1 is connected with the downhole booster column through a hydraulic line, wherein:
a screw motor 3 is connected between an oil pipe 11 in the pressurizing pipe column and the underground pressurizer 10; the lower part of the pressurizing pipe column is connected with a hydraulic patch pipe column; the hydraulic pressure patch pipe column is provided with a hydraulic anchor 4, an upper sealing device 5, a lower sealing device 6, a patch pipe 8, a sealing device connecting pipe column 13 and a patch pressure limiting valve 14, wherein the hydraulic anchor 4 is sequentially connected with the upper sealing device 5, the sealing device connecting pipe column 13 and the lower sealing device 6, and the patch pressure limiting valve 14 is arranged in the sealing device connecting pipe 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 column 13 in opposite directions, and the patch pipe 8 is fixed outside the upper sealing device 5 and the lower sealing device 6; the configuration of the upper and lower sealing means 5 and 6 will now be described by way of example of the structure of the sealing means 5: 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 hole 5-2 is formed in the tube body of the central tube 5-13, the upper end of the central tube 5-13 is connected with the upper shell 5-1 of the sealing device, and the lower end of the central tube is sleeved with the 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 end 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.
The hydraulic pump station 12 is arranged on the ground 1, the hydraulic pump station 12 is a general hydraulic pump, and the working medium is drilling fluid. The hydraulic patch pipe column is connected to the lower end of the pressurizing pipe column, and the pressurizing pipe column and the hydraulic patch pipe column are lowered to the damaged position of the screen pipe 2 through the workover rig. The tubing 11, the screw motor 3 and the down-hole booster 10 in the booster string are common devices. The hydraulic pump station 12 on the well provides hydraulic power for the pressurizing pipe column and the hydraulic repairing pipe column, drives the screw motor 3 to rotate through the oil pipe 11 to pressurize the underground pressurizer 10, and expands the hydraulic anchor 4 and then fixes the hydraulic anchor in the inner wall of the screen pipe 2. After the pressurization is continued, as the sealing device is connected with the repairing 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 and the repairing pipe 8 is fixed on the inner wall of the screen pipe 2, and the repairing operation of the damaged screen pipe 2 is completed.
On the basis of the first embodiment, the present invention also has the following embodiments: the outer wall of the tube body in the central tube 5-13 is a non-constant diameter outer wall, the liquid outlet hole 5-2 is arranged at the minimum outer diameter of the central tube 5-13, and a hydraulic cavity 5-12 is formed between a groove at the minimum outer diameter and the inner wall of the upper shell 5-1 of the sealing device.
The lining elastic steel sheet 5-6 is at least provided with three pieces, two ends of the lining elastic steel sheet 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 assembling boss, and one ends provided with the assembling bosses are respectively fixed in assembling grooves in the upper shell 5-1 and the rubber cylinder seat 5-9 of the sealing device in opposite directions.
A gap is arranged between the unfixed end of the upper return steel sheet 5-5 and the unfixed 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 arranged on more than three pieces.
An inner sealing ring 5-4 and an outer sealing ring 5-3 are respectively arranged on the outer wall of the central tube 5-13 and the outer wall of the piston 5-11 which are positioned below the hydraulic cavity 5-12.
The patch tube 8 is made of a hydraulic forming patch material, the upper part and the lower part of the patch tube 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 grooves, the fixing pins fix the upper ends and the lower ends of the patch tubes 8 between the upper sealing device shell 5-1 of the upper sealing device 5 and the upper sealing device 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 ensure the fixation of the hydraulic patch pipe column 8 in the lowering process, and the fixing ring 9 can assist the patch pipe 8 to be attached to the inner wall of the screen pipe 2 more tightly. The hydroformed patch materials that can make patch tube 8 are 304L stainless steel, 321 stainless steel, and 316 stainless steel. After drilling fluid which comes from an uphole hydraulic pump station 12 and is pressurized by a downhole booster 10 firstly enters a hydraulic cavity 5-12 of an upper sealing device 5 to push down a piston 5-11, hydraulic pressure sequentially pushes a 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 tightly attached due to the control of a lower shell 5-10 of the sealing device and a patch pressure limiting valve 14.
The fixing ring 9 is a metal fixing belt with meshing bayonets at two ends, ring-shaped clamping teeth are further arranged on the outer surface of the fixing ring, and the fixing ring is arranged in a fixing ring groove of the patch tube 8 through the meshing bayonets at two ends; the fixed ring 9 is made of a metal material with the elongation more than or equal to 30% and the yield stress less than 50MPa, and ring-shaped latches on the outer surface of the fixed ring 9 are subjected to hardening treatment. The fixing ring 9 belongs to a ductile soft metal sealing ring, and the metal capable of manufacturing the fixing ring 9 comprises red copper, lead, pure aluminum and the like. And (5) shrinking the fixing ring groove part of the patch tube 8 and then installing the patch tube into the fixing ring 9. During hydroforming, the ring-shaped clamping teeth outside the fixed ring 9 deform under the action of pressure, so that the contact area and strength between the clamping teeth and the inner wall of the screen pipe 2 are increased, 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 guide head 7 through an oil pipe 11 or directly connected with the guide head 7, so that the hydraulic patch pipe column is conveniently put in.
The patch pressure limiting 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 internally 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;
the bypass fluid passage valve core 14-12 and the bypass fluid passage return spring 14-9 are arranged at the position of the omnibearing patch fluid flow port 14-10 of the bypass fluid passage 14-2; the liquid inlet channel 14-1 is internally provided with a liquid inlet channel valve core 14-7 and a liquid inlet channel return spring 14-5, 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 opening 14-4, the liquid inlet of the bypass liquid channel and the liquid flow opening 14-3 of the lower sealing device;
the liquid inlet channel return spring 14-5 is arranged in a separation platform 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 arranged below the separation platform 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.
The outside of the valve core 14-7 of the liquid inlet channel is provided with a valve core sealing ring I14-6, and the outside of the valve core 14-12 of the bypass channel is provided with a valve core sealing ring II 14-11.
Liquid from the upper pipe column enters the patch pressure limiting valve 14 from the liquid inlet channel 14-1, after the pressure is increased to the opening pressure of the patch pressure limiting valve 14, the liquid inlet channel valve core 14-7 overcomes the elasticity of the liquid inlet channel return spring 14-5 and descends, 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 the bypass fluid passage return spring 14-9 is overcome, the bypass fluid passage valve core 14-12 is opened upwards, and the liquid enters the space formed by the upper sealing device 5, the patch pipe 8 and the lower sealing device 6 from the full-scale patch fluid inlet 14-10, so that the middle pipe body of the patch pipe 8 is deformed and expanded and is tightly attached to the inner wall of the screen pipe 2, and the damaged part of the screen pipe 2 is tightly attached and repaired.
The screw motor 3 in the present invention can use 7lz73×7.0 and 9lz79×7.0L types of screw motors. The downhole booster 10 can use a double helical groove screw motor downhole booster, a screw commutated screw motor downhole booster, and a 2JZ7 model downhole booster.
A method of constructing a well screen hydroforming patch system, comprising the steps of: A. firstly, connecting a hydraulic patch pipe column at the lower end of a pressurizing pipe column, and lowering the hydraulic patch pipe column into a well through a well repairing machine, wherein the hydraulic patch pipe column is positioned at the damaged position of a screen pipe 2; B. hydraulic pressure on the well at the surface 1Pump with a pump bodyThe hydraulic pump in station 12 communicates with the oil line 11 in the booster column via a hydraulic line; C. opening hydraulic pressure in a wellPump with a pump bodyThe hydraulic pump in station 12, through screw motor 3 and down hole booster 10, boosts the working pressure of the drilling fluid to hydraulic anchor 4, anchoring the hydraulic patch string in the inner wall of screen 2; D. the hydraulic pump, the screw motor 3 and the underground booster 10 in the hydraulic pump station 12 continue to boost the drilling fluid to the working pressure of the upper sealing device 5, so that the rubber cylinder 5-7 is expanded to tightly attach the upper part of the patch pipe 8 together with the fixing ring 9 to the inner wall of the screen pipe 2; E. the hydraulic pump, the screw motor 3 and the down-hole booster 10 in the down-hole hydraulic pump station 12 continuously boost the drilling fluid to the opening pressure of the patch pressure limiting valve 14 and to the working pressure of the lower sealing device 6, so that the rubber barrels 5-7 in the lower sealing device 6 are expanded and the lower part of the patch pipe 8 is tightly attached to the inner wall of the sieve tube 2 together with the fixing ring 9; F. the patch limiting valve 14 is kept in an open state, and drilling fluid is continuously pressurized, so that the middle pipe body of the patch pipe 8 is deformed and swelled and is tightly attached to the inner wall of the screen pipe 2, and the damaged part of the screen pipe 2 is tightly attached and repaired;
J. after the screen pipe 2 is patched, the hydraulic pump in the hydraulic pump station 12 on the well is closed. The pressure in the pressurizing pipe column and the hydraulic pressure patch pipe column is reduced, the upper sealing device 5 automatically releases pressure, the valve core 14-7 of the liquid inlet channel of the patch pressure limiting valve 14 is reset and ascends under the action of the return spring 14-5 of the liquid inlet channel, the pressure relief opening 14-4 at the bottom of the valve seat of the patch pressure limiting valve 14 is communicated with the outside, the lower sealing device 6 completes pressure relief, and the liquid in the patch pipe 8 naturally releases pressure.
After the drilling fluid is decompressed, the pistons 5-11 in the upper sealing device 5 and the lower sealing device 6 return under the action of the lining elastic steel sheet 5-6, the rubber cylinder 5-7 returns under the action of the upper return steel sheet 5-5 and the lower return steel sheet 5-8, and the hydraulic repairing pipe column and the pressurizing pipe column are lifted up to the ground 1.
In the invention, the upper end of a sealing device upper shell 5-1 of an upper sealing device 5 in a hydraulic patch pipe column is in threaded connection with a shell of a hydraulic anchor 4, and the lower end of a sealing device lower shell 5-10 is in threaded connection with a sealing device connecting pipe column 13. When the high-pressure drilling fluid is in operation, the high-pressure drilling fluid pushes the piston 5-11 to move downwards, 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 cylinder 5-7 to expand and deform, the upper part of the patch tube 8 is expanded and sealed and attached to the inner wall of the screen tube 2, and 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. After the work is completed 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 sealing device lower 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 sealing device upper 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. During operation, the patch tube 8 expands and deforms, and the fixing pin automatically breaks under the action of the tensile force, so that the patch tube 8 is separated.
The lower seal housing 5-10 of the lower seal 6 is threadedly connected to the seal connection string 13. When the screen pipe 2 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 cylinder 5-7 to expand and deform, and the lower part of the patch pipe 8 is expanded and sealed and attached to the inner wall of the screen pipe 2. 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 completed 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 process of lowering the hydraulic patch pipe column.
The embodiments described above are only exemplary embodiments, but the present invention is not limited to these embodiments, and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and concept of the present invention should be included in the scope of the present invention. Therefore, the scope of protection is not limited to the description above.
Claims (11)
1. The utility model provides a well screen pipe hydroforming subsidy system, includes the pressure boost tubular column, is equipped with oil pipe (11) and booster (10) in the pressure boost tubular column in the pit, and the aboveground hydraulic power unit (12) of setting on ground (1) are connected characterized by through hydraulic pressure pipeline and pressure boost tubular column in the pit: a screw motor (3) is connected between an oil pipe (11) in the pressurizing pipe column and the underground pressurizer (10); the lower part of the pressurizing pipe column is connected with a hydraulic patch pipe column; the hydraulic pressure patch pipe column is provided with a hydraulic anchor (4), an upper sealing device (5), a lower sealing device (6), a patch pipe (8), a sealing device connecting pipe column (13) and a patch pressure limiting valve (14), wherein the hydraulic anchor (4) is sequentially connected with the upper sealing device (5), the sealing device connecting pipe column (13) and the lower sealing device (6), and the patch pressure limiting valve (14) is arranged in the sealing device connecting pipe 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 column (13) in opposite directions, and the patch pipe (8) is fixed outside the upper sealing device (5) and the lower sealing device (6); 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 hole (5-2) is formed in the tube body of the central tube (5-13), the upper end of the central tube (5-13) is connected with the upper shell (5-1) of the sealing device, and the lower end of the central tube is sleeved with the lower shell (5-10) of the sealing device; a lining elastic steel sheet (5-6) is fixed in the lower body of the piston (5-11) and the lower end 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).
2. A screen hydroforming patch system according to claim 1, wherein the outer wall of the body in the base pipe (5-13) is a non-constant diameter outer wall, the outlet opening (5-2) is provided at the smallest outer diameter of the base pipe (5-13) and a recess at the smallest outer diameter forms a hydraulic chamber (5-12) with the inner wall of the upper housing (5-1) of the sealing means.
3. A screen hydroforming patch system according to claim 1, wherein the lining elastic steel sheet (5-6) is provided with at least three pieces and both ends are fixed in the lower body of the piston (5-11), the lower end of the piston (5-11) is screwed with the lower housing (5-10) of the sealing device, and the lower housing (5-10) of the sealing device is screwed with the connecting pipe column (13) of the sealing device.
4. A screen tube hydroforming repair system according to claim 1, wherein the inner walls of one end of the upper return steel sheet (5-5) and the lower return steel sheet (5-8) are provided with assembling bosses and one end provided with the assembling bosses are fixed in assembling grooves in the upper housing (5-1) and the rubber tube seat (5-9) of the sealing device respectively in opposite directions.
5. A screen hydroforming patch system according to claim 1 or 4, wherein a gap is provided between the unsecured end of the upper return steel sheet (5-5) and the unsecured end of the lower return steel sheet (5-8); the upper return steel sheet (5-5) and the lower return steel sheet (5-8) are arranged on more than three pieces.
6. A screen hydroforming patch system according to claim 2, wherein the outer wall of the base pipe (5-13) and the outer wall of the piston (5-11) below the hydraulic chamber (5-12) are provided with an inner sealing ring (5-4) and an outer sealing ring (5-3), respectively.
7. A screen hydroforming patch system according to claim 1, wherein the patch tube (8) is made of hydroforming patch material, the upper and lower parts of the patch tube (8) are provided with retainer ring grooves respectively and the retainer ring grooves are provided with retainer rings (9); fixing pins are further arranged in the patch pipes (8) above and below the fixing ring grooves, the fixing pins fix the upper ends and the lower ends of the patch pipes (8) between the upper sealing device shell (5-1) of the upper sealing device (5) and the upper sealing device shell (5-1) of the lower sealing device (6) respectively, and the patch pipes (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).
8. A screen hydroforming patch system according to claim 1 or 7, wherein the retainer ring (9) is a metal retainer belt with mating bayonets at both ends, and the outer surface is further provided with ring-shaped latches and is fitted into the retainer ring grooves of the patch tube (8) via the mating bayonets at both ends; the fixing ring (9) is made of a metal material with the elongation more than or equal to 30% and the yield stress less than 50MPa, and ring-shaped teeth on the outer surface of the fixing ring (9) are subjected to hardening treatment.
9. A screen hydroforming patch system according to claim 1, wherein the lower end of the lower seal (6) is connected to the guide head (7) by means of an oil pipe (11) or directly to the guide head (7).
10. The well screen hydroforming patch system according to claim 1, wherein the patch pressure limiting valve (14) is provided with a valve body (14-8), a feed passage (14-1), a feed passage spool (14-7), a feed passage return spring (14-5), a bypass passage (14-2), a bypass passage spool (14-12), a bypass passage return spring (14-9), and a relief port (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 internally 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); the bypass fluid passage valve core (14-12) and the bypass fluid passage return spring (14-9) are arranged at the position of the omnibearing patch fluid flow port (14-10) of the bypass fluid passage (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 opening (14-4), the liquid inlet of the bypass liquid channel and the liquid flow opening (14-3) of the lower sealing device; the liquid inlet channel return spring (14-5) is arranged in a separation platform 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 arranged below the separation platform and is communicated with the bypass liquid channel (14-2), and the liquid inlet of the bypass liquid channel is arranged in the separation wall between the liquid inlet channel (14-1) and the bypass liquid channel (14-2).
11. A method of constructing a well screen hydroforming patch system as recited in claim 1, comprising: A. firstly, connecting a hydraulic patch pipe column at the lower end of a pressurizing pipe column, and lowering the hydraulic patch pipe column into a well through a well repairing operation machine, wherein the hydraulic patch pipe column is positioned at the damaged position of a screen pipe (2); B. the hydraulic pump in the hydraulic pump station (12) on the well is communicated with the oil pipe (11) in the booster column through a hydraulic pipeline on the ground (1); C. starting a hydraulic pump in an aboveground hydraulic pump station (12), pressurizing drilling fluid to the working pressure of a hydraulic anchor (4) through a screw motor (3) and a downhole pressurizer (10), and anchoring a hydraulic patch pipe column in the inner wall of a screen pipe (2); D. the hydraulic pump, the screw motor (3) and the underground booster (10) in the underground hydraulic pump station (12) continuously boost the drilling fluid to the working pressure of the upper sealing device (5), so that the rubber cylinder (5-7) is expanded to tightly attach the upper part of the patch tube (8) together with the fixing ring (9) to the inner wall of the screen tube (2); E. the hydraulic pump, the screw motor (3) and the underground booster (10) in the underground hydraulic pump station (12) continuously boost the drilling fluid to the opening pressure of the patch pressure limiting valve (14) and continuously boost the drilling fluid to the working pressure of the lower sealing device (6), so that the rubber sleeve (5-7) in the lower sealing device (6) swells and the lower part of the patch pipe (8) is tightly attached to the inner wall of the screen pipe (2) together with the fixing ring (9); F. the patch pressure limiting valve (14) is kept in an open state, drilling fluid is continuously pressurized, so that the middle pipe body of the patch pipe (8) is deformed and expanded and is tightly attached to the inner wall of the screen pipe (2), and the damaged part of the screen pipe (2) is tightly attached and repaired; J. and after the screen pipe (2) is repaired, closing the hydraulic pump in the hydraulic pump station (12) on the well.
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| CN202011159379.2A CN114482894B (en) | 2020-10-27 | 2020-10-27 | Hydraulic forming and repairing system for well screen pipe and construction method thereof |
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| US11156057B2 (en) * | 2017-01-15 | 2021-10-26 | Jeffrey Bruce Wensrich | Downhole tool including a resettable plug with a flow-through valve |
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| CN208686366U (en) * | 2018-09-04 | 2019-04-02 | 中国石油化工集团公司 | Water injection well well workover system with pressure |
| CN110410031A (en) * | 2019-06-14 | 2019-11-05 | 中国石油天然气股份有限公司 | It returns and is inserted every adopting THE REPRODUCTION TECHNOLOGY WITH tubing string and method at the top of a kind of casing damaged well expandable casing patching |
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