CN112696164A - Hydraulic casing patching tubular column and method - Google Patents
Hydraulic casing patching tubular column and method Download PDFInfo
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- CN112696164A CN112696164A CN201911004816.0A CN201911004816A CN112696164A CN 112696164 A CN112696164 A CN 112696164A CN 201911004816 A CN201911004816 A CN 201911004816A CN 112696164 A CN112696164 A CN 112696164A
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Abstract
The invention discloses a hydraulic casing patching tubular column and a method, which comprises the following steps: the outer-layer metal patch pipe column is put into a position needing to be patched in the casing; the inner layer hydraulic patch service pipe column is arranged in the outer layer metal patch pipe column and radially extrudes the outer layer metal patch pipe column. The problems of reducing diameter, pipe column clamping and the like in the conventional casing broken well repairing technology are solved. The casing patching method is simple in construction, short in period and high in safety, greatly improves the casing broken well repairing efficiency, and has wide application prospects in various oil fields.
Description
Technical Field
The invention relates to the technical field of downhole operation of oil and gas wells, in particular to a hydraulic casing patching tubular column and a method.
Background
With the continuous deep development of oil fields, the number of casing damage wells increases year by year, casing damage is the main type of casing damage, and the oil well stops production, the water well stops injection, the well pattern is damaged, and the reserves are out of control. The existing casing broken well repairing method mainly takes technologies such as small casing secondary well cementation, expansion pipe patching and the like as main parts, the construction period of the small casing secondary well cementation repairing is long, the diameter of the repaired casing is reduced seriously, and later measures are not facilitated to implement; the expansion pipe patching adopts the expansion patching pipe which is expanded by pulling a mechanical expansion head, has high requirements on well conditions, is easy to clamp the expansion head, and has a certain degree of shrinkage. The above casing broken well repairing technology preliminarily meets the casing broken well repairing requirement, but the patching efficiency and effect need to be further improved.
Application No.: 201821824079.X, application date: 2018-11-07 provides a subsiding tubular column for casing subsiding, comprising: the sealing device comprises an upper sealing slip seat, a first subsidy pipe section, a second subsidy pipe section and a lower sealing slip seat which are sequentially butted from top to bottom, wherein the first subsidy pipe section and the second subsidy pipe section are conical pipes, the taper of each conical pipe is 1: 26-1: 40, the small end of the first subsidy pipe section is butted with the small end of the second subsidy pipe section, and the first subsidy pipe section and the second subsidy pipe section are integrally formed. The utility model discloses a when hydraulic machinery makes first subsidy pipeline section and the inflation of second subsidy pipeline section, because the head that expands is located the junction of first subsidy pipeline section and second subsidy pipeline section, the head that expands makes first subsidy pipeline section and second subsidy pipeline section take place the inflation under high-pressure liquid's effect, because the pressure of the first installation department that expands is the biggest, therefore the inflation dynamics of first subsidy pipeline section and second subsidy pipeline section junction is the biggest.
Application No.: 201810565411.3, filing date: 2018-06-04A downhole casing patching anti-sticking ash injection pipe column and a casing patching method, an upper replacing device is placed in a patching pipe conveying pipe column, the upper replacing device is matched and sealed with the patching pipe conveying pipe column, a lower replacing device is placed at the lower part of the patching pipe, the lower replacing device and the patching pipe are matched and sealed, the lower replacing device is connected to the patching pipe by a shear pin, the upper part of a separation joint is connected to the lower part of the patching pipe conveying pipe column, the inner diameter of a through hole in the lower replacing device is smaller than the blockage at the lower part of the upper replacing device, the upper part of a one-way sealing device is connected to the lower inner part of the separation joint, the one-way sealing device is placed into the patching pipe from the upper part of the patching pipe and then is connected with the lower outer part of the separation joint, the one-way sealing device is matched with the patching pipe to realize one-way sealing, liquid flow can be pushed downwards from an annular channel between the one-way, the patching pipe conveying pipe column is separated from the patching pipe, cement paste is injected into the well to patch the casing pipe, and the patching pipe conveying pipe column cannot be clamped by the cement after patching is finished.
Application No.: 201710322890.1, filing date: 2017-05-09 discloses a casing patching device and a casing patching method, and belongs to the field of oilfield machinery. The device includes: and (3) patching the expansion pipe to be patched, wherein the outer diameter of the expansion pipe to be patched is smaller than the inner diameter of the patched expansion pipe. The device also includes: the hydraulic component, and can axially slide the upper sliding block and the lower sliding block that are sleeved on the hydraulic component. The upper slide block and the lower slide block are abutted against each other in the expansion pipe to be repaired. The upper sliding block slides downwards to form an integral expansion block which is matched with the lower sliding block to expand along the radial direction and is used for expanding the expansion pipe to be repaired. The hydraulic assembly is used for driving the upper sliding block to slide downwards and driving the integral expansion block to move upwards. The device is not influenced by the position of the repaired expansion pipe and the repairing times, avoids the repaired expansion pipe bearing large load, and has the characteristics of time and labor saving, convenience in repairing the leakage point of the sleeve and the like.
Application No.: 201811357507.7, filing date: 2018-11-15 provides a self-expansion patching method for an oil well casing, which comprises the following steps: connecting the operation cable with a tool set, and fixing an organic composite material patch base cylinder with a shape memory function between the electromagnetic expansion disc and the rigid expansion head; fixing a wellhead, and connecting the operation cable with a ground cable operation vehicle; the operation cable drives the tool set and the subsidy base cylinder to go down the well; positioning the damaged part of the sleeve, and seating the organic composite material patch base cylinder; electrifying the ground; heating the organic composite material subsidy base cylinder to a temperature higher than the shape recovery temperature of the organic composite material subsidy base cylinder, and realizing first interference expansion and expansion of the base cylinder so as to subsidy the base cylinder to the damaged section; lifting the cable, and moving the tool set upwards integrally, wherein the rigid expansion head, the elastic expansion head and the plug perform secondary expansion on the organic composite material patch base cylinder to expand the base cylinder; the wireline and downhole tool string are retrieved from the well. The method has the advantages of simple construction process, convenient operation, good corrosion resistance of the patching base cylinder, safety and reliability.
Application No.: 201820578675.8 application date: 2018-04-23 relates to a novel expansion sleeve subsidy device, which comprises a rubber tube, an expansion sleeve, a central tube, an expansion cone, a copper ball and a ball seat and is characterized in that the rubber tube is arranged on the outer side of the expansion sleeve, the central tube is arranged on the inner side of the expansion sleeve, the expansion cone is arranged below the central tube, the ball seat is arranged below the expansion cone, and the copper ball is arranged at the central position of the ball seat. The beneficial effects of the utility model are that, the expansion sleeve pipe cover is gone into the cover intraductal cold again and is expanded, and compressive strength is high, and 2000psi is higher than ordinary expansion pipe withstand voltage, and the internal diameter can reach 113mm after the subsidy moreover, does not influence the later stage operation, can carry out the secondary subsidy because of its internal diameter is great, can realize long distance subsidy through special threaded connection, and repair length can reach 1000 meters.
Application No.: 201511011846.6, filing date: 2015-12-30 discloses an oil well casing self-expansion patching device and a patching method thereof, wherein a memory alloy pipe with the outer diameter smaller than the inner diameter of the casing is used as a patching pipe base material, and a rubber sealing ring is fixed on the outer wall of the memory alloy pipe by using a temperature-resistant adhesive to form the patching pipe. And (3) lowering the patching pipe to the damaged position of the casing by using a downhole tool release device, heating the patching pipe by using the temperature in the well, rapidly self-expanding when the temperature of the memory alloy pipe reaches the training temperature, firmly patching the patching pipe on the inner wall of the casing to achieve the aim of repairing the casing, wherein the training temperature is determined according to the temperature of the damaged position of the casing. The patching pipe deforms in one direction, is reliable in sealing and leaking stoppage, has high strength, and can obviously enhance the internal pressure resistance and the external extrusion resistance of the damaged casing pipe. Meanwhile, the patching pipe has the self-expansion characteristic at the set temperature, so that the casing pipe can be repaired without adopting means such as hydraulic expansion or gunpowder explosion, and the like, and the patching pipe has the advantages of convenience in operation, safety in construction, difficulty in falling, long service life and the like.
The technical solutions of the above-disclosed technologies, the technical problems to be solved, and the advantageous effects thereof are all different from the present invention, and no technical inspiration exists in the above-disclosed technical documents for more technical features, technical problems to be solved, and advantageous effects thereof.
Disclosure of Invention
The invention aims to provide a hydraulic casing patching tubular column and a method, which solve the problems of diameter shrinkage, tubular column clamping and the like in the conventional casing broken and leaking well repairing technology. The casing patching method is simple in construction, short in period and high in safety, greatly improves the casing broken well repairing efficiency, and has wide application prospects in various oil fields.
In order to achieve the purpose, the invention adopts the following technical scheme that the hydraulic casing patching tubular column comprises:
the outer-layer metal patch pipe column is put into a position needing to be patched in the casing;
further comprising:
the inner layer hydraulic patch service pipe column is arranged in the outer layer metal patch pipe column and radially extrudes the outer layer metal patch pipe column.
Further, the outer metal patch tubular column includes:
the outer diameter of the metal patch pipe is smaller than the inner diameter of the sleeve;
the lower end of the positioning short section is connected with the upper end of the metal patch pipe, and the inner diameter of the positioning short section is larger than or equal to that of the metal patch pipe.
Further, the outer metal patch tubular column includes:
the hollow guide head is a hollow part, the lower end of the hollow guide head is conical, the upper end of the hollow guide head is connected with the lower end of the metal patch tube, and the inner diameter of the hollow guide head is larger than or equal to that of the metal patch tube.
Further, the inner hydraulic patch service string comprises:
the upper expansion pipe packer is connected to the oil pipe and is used for radially cold expanding the metal patch pipe above the damaged position of the sleeve;
and the lower expansion pipe packer is connected to the oil pipe, is positioned below the upper expansion pipe packer and is used for radially cold expanding a metal patch pipe positioned below the damaged part of the sleeve.
Further, still include:
and the upper end of the pressure control restrictor is connected with the lower end of the upper expansion pipe packer, and the lower end of the pressure control restrictor is connected with the upper end of the lower expansion pipe packer.
Further, still include:
the releasing mechanism is connected to the oil pipe and is positioned above the upper expansion pipe packer.
Further, the releasing mechanism is a locator.
In order to achieve the purpose, the invention adopts the following technical scheme that the method for patching the tubular column by the hydraulic sleeve is characterized by comprising the following steps:
the outer metal patch pipe column is put into the position needing patch in the casing;
the inner layer hydraulic patch service pipe column is put into the outer layer metal patch pipe column, and the outer layer metal patch pipe column is radially extruded through hydraulic pressure;
the outer metal patching tubular column is extruded to expand the diameter, the outer wall of the outer metal patching tubular column is tightly attached to the inner wall of the sleeve, and the damaged part is blocked.
Furthermore, an outer-layer pipe column guide head, a metal patching pipe and a positioning short section are connected on the ground, an inner-layer pipe column expansion pipe packer, a pressure control flow controller and a positioner are connected, the inner-layer pipe column penetrates into the outer-layer pipe column, the positioner is connected with the positioning short section in a matched mode to form a whole, and the whole is put into the position which is three meters below the broken leakage position of the casing.
And further, starting a pump truck on the ground to pressurize, transferring liquid to an inner layer patching service pipe column through an oil pipe, setting and sealing the pipe expansion packer, forming a closed cavity in the metal patching pipe, continuously pressurizing, opening a pressure control throttler, filling the cavity with the liquid, raising the pressure, starting to expand the metal patching pipe, stabilizing the pressure for 15-20min, ensuring that the patching pipe is completely expanded, tightly attaching the patching pipe to an external leakage breaking sleeve, and releasing the pressure.
And further, finally, a steel ball is thrown in, the steel ball is pressed after being seated, the ball seat is knocked off, the positioner is separated from the positioning short section, the inner-layer patching tubular column is popped out, and casing patching operation is completed.
Compared with the prior art, the invention has the following beneficial effects:
(1) a brand-new casing patching repairing method is provided for completing patching repairing of a casing broken leakage well, the patching method utilizes the close fitting of expandable metal and an original casing to plug a broken leakage point, and the patching method is resistant to high temperature and high pressure and has larger inner drift diameter than that of a small casing secondary well cementation patching and an expansion pipe patching after patching.
(2) A brand new metal expansion method is provided, the method of expansion cone squeezing expansion and hydraulic expansion adopted in the conventional metal expansion is changed, the hydraulic expansion metal patch pipe is adopted, the requirement on the shaft condition is lower, the problem that the expansion cone is easy to clamp is solved, and the construction period is shortened.
(3) A novel attaching mode of the patch pipe is designed, the metal patch pipe is squeezed into a broken part of the sleeve by adopting hydraulic pressure, the patch pipe is attached to the sleeve more tightly, and the pressure resistance is high; through the close fitting of the patch pipe, the inner drift diameter of the bushing after patch is improved, and the later-stage operation is facilitated.
(4) The expandable metal patch pipe with high pressure resistance and good ductility is designed, has a large expansion ratio during patch, is tightly attached to the sleeve, has high strength after patch, and can resist erosion and corrosion.
(5) The pure metal sealing structure is designed, the structure adopts a soft metal coating for sealing, and after the metal patch tube expands, effective sealing is formed, and the pure metal sealing structure is high-temperature and high-pressure resistant, corrosion resistant and long in validity period.
Drawings
FIG. 1 is a schematic structural view of an outer metal patch tubular string according to the present invention;
FIG. 2 is a schematic structural diagram of an inner-layer hydraulic patch service string according to the present invention.
In the figure: the positioning short section 1, the metal patch tube 2 and the hollow seeker 3; an oil pipe 6, a positioner 7, an upper expansion pipe packer 8, a lower expansion pipe packer 10 and a pressure control restrictor 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1 to 2, the present invention provides a technical solution: a hydraulic casing patching string, comprising:
the outer-layer metal patch pipe column is put into a position needing to be patched in the casing;
further comprising:
the inner layer hydraulic patch service pipe column is arranged in the outer layer metal patch pipe column and radially extrudes the outer layer metal patch pipe column.
Further, the outer metal patch tubular column includes:
a metal patch tube 2, the outer diameter of which is smaller than the inner diameter of the sleeve 4;
the positioning nipple joint 1 is connected with the upper end of the metal patch pipe at the lower end and has an inner diameter larger than or equal to that of the metal patch pipe.
Further, the outer metal patch tubular column includes:
the hollow guide head 3 is a hollow part, the lower end of the hollow guide head is conical, the upper end of the hollow guide head is connected with the lower end of the metal patching tube, and the inner diameter of the hollow guide head is larger than or equal to that of the metal patching tube.
Further, the inner hydraulic patch service string comprises:
the upper expansion pipe packer 8 is connected to an oil pipe and is used for radially cold expanding a metal patch pipe above a damaged position of the sleeve;
and the lower expansion pipe packer 10 is connected to an oil pipe, is positioned below the upper expansion pipe packer, and radially cold expands the metal patch pipe positioned below the damaged part of the sleeve pipe.
Further, still include:
and the upper end of the pressure control restrictor 9 is connected with the lower end of the upper expanding tube packer, and the lower end of the pressure control restrictor is connected with the upper end of the lower expanding tube packer.
Further, still include:
the releasing mechanism is connected to the oil pipe and is positioned above the upper expansion pipe packer.
Further, the releasing mechanism is a locator 7.
The invention comprises a metal patch sealing pipe column on the outer layer and a hydraulic patch service pipe column on the inner layer. The outer metal patch sealing pipe column comprises a hollow guide head, a metal patch pipe, a positioning short section and the like, wherein the hollow guide head is used for guiding the patch sealing pipe column so as to be convenient for the pipe column to be put in; the metal patching pipe has the characteristics of high strength, good ductility and the like, is used for patching inside the leakage breaking sleeve after expansion, is internally provided with a plurality of sections of metal sealing anchoring sections, is used for anchoring on an external sleeve after patching, and is combined with the external sleeve by utilizing the sealing sections to complete metal sealing; the positioning short section is matched with a positioner of the hydraulic patch service pipe column for positioning and connecting the inner pipe column and the outer pipe column. The hydraulic patching service pipe column of the inner layer comprises a pipe expansion packer, a pressure control restrictor, a positioner and the like, wherein after the pipe expansion packer is sealed by expansion, a closed cavity is formed in the patching pipe, and the high-pressure-resistant hydraulic patching service pipe column is used for expanding the metal patching pipe; the pressure control throttler is closed under low pressure and opened when reaching a certain pressure to form a liquid flow channel for supplying liquid to the closed cavity; the locator is used with the locating nipple joint of outer layer cooperation.
Firstly, an outer-layer tubular column hollow guide head 3, a metal patching tube 2 and a positioning short section 1 are connected on the ground respectively, inner-layer tubular column expanding tube packers 8 and 10, a pressure control throttler 9 and a positioner 7 are connected, an inner-layer tubular column penetrates into the outer-layer tubular column, the positioner 6 is connected with the positioning short section 1 in an anchoring matching mode, the whole tubular column is lowered to be three meters below a casing leakage breaking position through an oil tube 5, then a pump truck is started on the ground to carry out pressurization, liquid is transmitted to an inner-layer patching service tubular column through the oil tube 5, the expanding tube packers 7 and 9 are sealed, a closed cavity is formed inside the metal patching tube, the pressurization is continued, the pressure control throttler 8 is opened, the cavity is filled with the liquid, the pressure is increased, the metal patching tube 2 begins to expand, the pressure is stabilized for 15-20min, the metal patching tube 2 is tightly attached to the leakage breaking casing 4; and finally, putting the steel ball 5, dropping the steel ball into the ball seat in the positioning pipe 7, hitting the ball seat, separating the positioning pipe nipple 1 from the positioner 7, and pulling out the inner-layer patching pipe column to finish the casing patching operation.
The invention adopts the hydraulic expansion extensible metal patching pipe to tightly attach the patching pipe to the leakage-broken casing pipe to complete the repair of the leakage-broken position, and the repaired pipe has the advantages of high temperature and high pressure resistance, large inner diameter, simple working procedure and short construction period, thereby providing a new technical means for the quick and low-cost repair of the broken casing well.
Example 2:
referring to fig. 1 to 2, the present invention provides a technical solution: a hydraulic casing patching string, comprising:
the outer-layer metal patch pipe column is put into a position needing to be patched in the casing;
further comprising:
the inner layer hydraulic patch service pipe column is arranged in the outer layer metal patch pipe column and radially extrudes the outer layer metal patch pipe column.
Further, the outer metal patch tubular column includes:
a metal patch tube 2, the outer diameter of which is smaller than the inner diameter of the sleeve 4;
the positioning nipple joint 1 is connected with the upper end of the metal patch pipe at the lower end and has an inner diameter larger than or equal to that of the metal patch pipe.
Further, the outer metal patch tubular column includes:
the hollow guide head 3 is a hollow part, the lower end of the hollow guide head is conical, the upper end of the hollow guide head is connected with the lower end of the metal patching tube, and the inner diameter of the hollow guide head is larger than or equal to that of the metal patching tube.
Further, the inner hydraulic patch service string comprises:
the upper expansion pipe packer 8 is connected to an oil pipe and is used for radially cold expanding a metal patch pipe above a damaged position of the sleeve;
and the lower expansion pipe packer 10 is connected to an oil pipe, is positioned below the upper expansion pipe packer, and radially cold expands the metal patch pipe positioned below the damaged part of the sleeve pipe.
Further, still include:
and the upper end of the pressure control restrictor 9 is connected with the lower end of the upper expanding tube packer, and the lower end of the pressure control restrictor is connected with the upper end of the lower expanding tube packer.
Further, still include:
the releasing mechanism is connected to the oil pipe and is positioned above the upper expansion pipe packer.
Example 3:
referring to fig. 1 to 2, the present invention provides a technical solution: a hydraulic casing patching string, comprising:
the outer-layer metal patch pipe column is put into a position needing to be patched in the casing;
further comprising:
the inner layer hydraulic patch service pipe column is arranged in the outer layer metal patch pipe column and radially extrudes the outer layer metal patch pipe column.
Further, the outer metal patch tubular column includes:
a metal patch tube 2, the outer diameter of which is smaller than the inner diameter of the sleeve 4;
the positioning nipple joint 1 is connected with the upper end of the metal patch pipe at the lower end and has an inner diameter larger than or equal to that of the metal patch pipe.
Further, the outer metal patch tubular column includes:
the hollow guide head 3 is a hollow part, the lower end of the hollow guide head is conical, the upper end of the hollow guide head is connected with the lower end of the metal patching tube, and the inner diameter of the hollow guide head is larger than or equal to that of the metal patching tube.
Further, the inner hydraulic patch service string comprises:
the upper expansion pipe packer 8 is connected to an oil pipe and is used for radially cold expanding a metal patch pipe above a damaged position of the sleeve;
and the lower expansion pipe packer 10 is connected to an oil pipe, is positioned below the upper expansion pipe packer, and radially cold expands the metal patch pipe positioned below the damaged part of the sleeve pipe.
Further, still include:
and the upper end of the pressure control restrictor 9 is connected with the lower end of the upper expanding tube packer, and the lower end of the pressure control restrictor is connected with the upper end of the lower expanding tube packer.
Example 4:
referring to fig. 1 to 2, the present invention provides a technical solution: a hydraulic casing patching string, comprising:
the outer-layer metal patch pipe column is put into a position needing to be patched in the casing;
further comprising:
the inner layer hydraulic patch service pipe column is arranged in the outer layer metal patch pipe column and radially extrudes the outer layer metal patch pipe column.
Further, the outer metal patch tubular column includes:
a metal patch tube 2, the outer diameter of which is smaller than the inner diameter of the sleeve 4;
the positioning nipple joint 1 is connected with the upper end of the metal patch pipe at the lower end and has an inner diameter larger than or equal to that of the metal patch pipe.
Further, the outer metal patch tubular column includes:
the hollow guide head 3 is a hollow part, the lower end of the hollow guide head is conical, the upper end of the hollow guide head is connected with the lower end of the metal patching tube, and the inner diameter of the hollow guide head is larger than or equal to that of the metal patching tube.
Further, the inner hydraulic patch service string comprises:
the upper expansion pipe packer 8 is connected to an oil pipe and is used for radially cold expanding a metal patch pipe above a damaged position of the sleeve;
and the lower expansion pipe packer 10 is connected to an oil pipe, is positioned below the upper expansion pipe packer, and radially cold expands the metal patch pipe positioned below the damaged part of the sleeve pipe.
Example 5:
referring to fig. 1 to 2, the present invention provides a technical solution: a hydraulic casing patching string, comprising:
the outer-layer metal patch pipe column is put into a position needing to be patched in the casing;
further comprising:
the inner layer hydraulic patch service pipe column is arranged in the outer layer metal patch pipe column and radially extrudes the outer layer metal patch pipe column.
Further, the outer metal patch tubular column includes:
a metal patch tube 2, the outer diameter of which is smaller than the inner diameter of the sleeve 4;
the positioning nipple joint 1 is connected with the upper end of the metal patch pipe at the lower end and has an inner diameter larger than or equal to that of the metal patch pipe.
Further, the outer metal patch tubular column includes:
the hollow guide head 3 is a hollow part, the lower end of the hollow guide head is conical, the upper end of the hollow guide head is connected with the lower end of the metal patching tube, and the inner diameter of the hollow guide head is larger than or equal to that of the metal patching tube.
Example 6:
referring to fig. 1 to 2, the present invention provides a technical solution: a hydraulic casing patching string, comprising:
the outer-layer metal patch pipe column is put into a position needing to be patched in the casing;
further comprising:
the inner layer hydraulic patch service pipe column is arranged in the outer layer metal patch pipe column and radially extrudes the outer layer metal patch pipe column.
Further, the outer metal patch tubular column includes:
a metal patch tube 2, the outer diameter of which is smaller than the inner diameter of the sleeve 4;
the positioning nipple joint 1 is connected with the upper end of the metal patch pipe at the lower end and has an inner diameter larger than or equal to that of the metal patch pipe.
Further, the inner hydraulic patch service string comprises:
the upper expansion pipe packer 8 is connected to an oil pipe and is used for radially cold expanding a metal patch pipe above a damaged position of the sleeve;
and the lower expansion pipe packer 10 is connected to an oil pipe, is positioned below the upper expansion pipe packer, and radially cold expands the metal patch pipe positioned below the damaged part of the sleeve pipe.
Example 7:
referring to fig. 1 to 2, the present invention provides a technical solution: a hydraulic casing patching string, comprising:
the outer-layer metal patch pipe column is put into a position needing to be patched in the casing;
further comprising:
the inner layer hydraulic patch service pipe column is arranged in the outer layer metal patch pipe column and radially extrudes the outer layer metal patch pipe column.
Further, the inner hydraulic patch service string comprises:
the upper expansion pipe packer 8 is connected to an oil pipe and is used for radially cold expanding a metal patch pipe above a damaged position of the sleeve;
and the lower expansion pipe packer 10 is connected to an oil pipe, is positioned below the upper expansion pipe packer, and radially cold expands the metal patch pipe positioned below the damaged part of the sleeve pipe.
Example 8:
referring to fig. 1 to 2, the present invention provides a technical solution: a hydraulic casing patching string, comprising:
the outer-layer metal patch pipe column is put into a position needing to be patched in the casing;
further comprising:
the inner layer hydraulic patch service pipe column is arranged in the outer layer metal patch pipe column and radially extrudes the outer layer metal patch pipe column.
Although fig. 1 to 2 are used in all the above embodiments, it is obvious to those skilled in the art that separate drawings are not shown as long as the parts or structural features missing in the embodiments are removed from the drawings. As will be clear to the skilled person. Of course, the embodiments with more components are only the best embodiments, and the embodiments with less components are the basic embodiments, but the basic objects of the invention can also be achieved, so all of them are within the protection scope of the invention.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threading, bolting, etc. The diagrammatic illustration of the invention is thus fully apparent, the mechanical construction of each component being not subject to modification, and the details of the particular connections of all the components will be apparent to those skilled in the art.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A hydraulic casing patching string, comprising:
the outer-layer metal patch pipe column is put into a position needing to be patched in the casing;
it is characterized by also comprising:
the inner layer hydraulic patch service pipe column is arranged in the outer layer metal patch pipe column and radially extrudes the outer layer metal patch pipe column.
2. The hydraulic casing patch string of claim 1, wherein the outer metal patch string comprises:
the outer diameter of the metal patch pipe is smaller than the inner diameter of the sleeve;
the lower end of the positioning short section is connected with the upper end of the metal patch pipe, and the inner diameter of the positioning short section is larger than or equal to that of the metal patch pipe.
3. The hydraulic casing patch string of claim 2, wherein the outer metal patch string comprises:
the hollow guide head is a hollow part, the lower end of the hollow guide head is conical, the upper end of the hollow guide head is connected with the lower end of the metal patch tube, and the inner diameter of the hollow guide head is larger than or equal to that of the metal patch tube.
4. A hydraulic casing patch string according to claim 1, 2 or 3, wherein the inner hydraulic patch service string comprises:
the upper expansion pipe packer is connected to the oil pipe and is used for radially cold expanding the metal patch pipe above the damaged position of the sleeve;
and the lower expansion pipe packer is connected to the oil pipe, is positioned below the upper expansion pipe packer and is used for radially cold expanding a metal patch pipe positioned below the damaged part of the sleeve.
5. The hydraulic casing patch string of claim 4, further comprising:
and the upper end of the pressure control restrictor is connected with the lower end of the upper expansion pipe packer, and the lower end of the pressure control restrictor is connected with the upper end of the lower expansion pipe packer.
6. The hydraulic casing patch string of claim 5, further comprising:
the releasing mechanism is connected to the oil pipe and is positioned above the upper expansion pipe packer.
7. The hydraulic casing patch string of claim 6, wherein the release mechanism is a retainer.
8. A method for patching a tubular column by a hydraulic sleeve is characterized by comprising the following steps:
the outer metal patch pipe column is put into the position needing patch in the casing;
the inner layer hydraulic patch service pipe column is put into the outer layer metal patch pipe column, and the outer layer metal patch pipe column is radially extruded through hydraulic pressure;
the outer metal patching tubular column is extruded to expand the diameter, the outer wall of the outer metal patching tubular column is tightly attached to the inner wall of the sleeve, and the damaged part is blocked.
9. The method of claim 8, wherein the outer tubular column guide head, the metal patch tube and the positioning nipple are connected to each other at the surface, the inner tubular column expansion packer, the pressure control restrictor and the positioner are connected to each other, the inner tubular column penetrates into the outer tubular column, the positioner and the positioning nipple are connected to each other in a matching manner to form a whole, and the whole is lowered to three meters below the casing leakage position.
10. The method of claim 9, wherein the pump truck is then driven to pressurize at the surface, the fluid is transferred to the inner layer patch service string through the oil pipe, the expanded pipe packer is set, a closed cavity is formed inside the metal patch, the pressurizing is continued, the pressure control restrictor is opened, the fluid fills the cavity, the pressure is raised, the metal patch is expanded, the pressure is stabilized for 15-20min, the patch is completely expanded, and is tightly attached to the outer leakage-breaking sleeve, and the pressure is released.
11. The method of claim 10, wherein a steel ball is finally inserted, the steel ball is pressed when seated, the ball seat is broken, the locator is disengaged from the locating nipple, and the inner-layer patching string is lifted out, thereby completing the patching operation of the casing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911004816.0A CN112696164A (en) | 2019-10-22 | 2019-10-22 | Hydraulic casing patching tubular column and method |
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| CN201911004816.0A CN112696164A (en) | 2019-10-22 | 2019-10-22 | Hydraulic casing patching tubular column and method |
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| CN112696164A true CN112696164A (en) | 2021-04-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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Application publication date: 20210423 |