CN103291238B - A kind of reexpansion patch device crossing patching tube - Google Patents

A kind of reexpansion patch device crossing patching tube Download PDF

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Publication number
CN103291238B
CN103291238B CN201310228800.4A CN201310228800A CN103291238B CN 103291238 B CN103291238 B CN 103291238B CN 201310228800 A CN201310228800 A CN 201310228800A CN 103291238 B CN103291238 B CN 103291238B
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China
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tube
cone
swollen cone
expansion
swollen
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CN201310228800.4A
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Chinese (zh)
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CN103291238A (en
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刘晓辉
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华鼎鸿基石油工程技术(北京)有限公司
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Abstract

The invention discloses a kind of reexpansion patch device crossing patching tube, comprise hydraulic system, expansion tube and expansion cone, in three, the external diameter of expansion cone is maximum, expansion cone comprises swollen cone and lower swollen cone, upper swollen cone is relative with the conical surface of lower swollen cone, the coning angle of upper swollen cone is less than the coning angle of lower swollen cone, and expansion tube is positioned at therebetween, and hydraulic system can drive swollen cone and lower swollen cone relative motion.During the work of reexpansion patch device, the coning angle of upper swollen cone is less first gets into expansion tube, forms one section of horn mouth in the upper end of expansion tube, on carry this device, expansion tube, by former patching tube grappling continuation is carried by horn mouth, lower swollen cone enters expansion tube, and after expansion tube, secondary has been subsidized.In this device, the external diameter of expansion cone is maximum, the external diameter of expansion cone is slightly less than the internal diameter of former patching tube, the external diameter of expansion cone is the internal diameter of secondary patching tube, then the internal diameter of secondary patching tube is substantially identical with the internal diameter of former patching tube, and the internal diameter of the secondary patching tube of acquisition is larger.

Description

A kind of reexpansion patch device crossing patching tube

Technical field

The present invention relates to technical field of petroleum industry, particularly relate to a kind of reexpansion patch device crossing patching tube.

Background technology

In oilfield development process, down-hole casing is often damaged, and expandable casing patching technology is a kind of conventional restorative procedure, by driving the cone motion in expansion tube, the diameter of expansion tube is increased, and subsidy down-hole casing, the expansion tube after expansion is patching tube.

Sometimes the damage of down-hole casing is lasting, and As time goes on a place, also new damage can occur after damaging subsidy, if new damaged location occurs in the below of former patching tube, just needs through former patching tube when carrying out secondary subsidy.

A kind of typical expandable casing patching device as shown in Figure 1, the front end of the connecting rod 1' of expansion gear is inserted in expansion cone 2' tail end, and be connected with expansion cone 2' by screw thread, be the expansion arc 3' of diameter gradual change from big to small in the middle of expansion cone 2', connecting rod 1' communicates with the centre bore of expansion cone 2'.Expansion tube 4' welds with pressure cylinder 5', and the other end welding end socket 6' of pressure cylinder 5', the end of the centre bore of end socket 6' has groove 7', and the spheroid in groove 7' defines exhaust structure, mineralization pressure chamber 8' between expansion cone 2' front end and end socket 6'.

When subsidizing, expansion gear is needed the position of subsidy down to down-hole casing, in pressure chamber 8', squeeze into highly pressurised liquid by the centre bore of connecting rod 1' and expansion cone 2', the gas in pressure chamber 8' is discharged by outlet valve, then seals outlet valve; Highly pressurised liquid in pressure chamber 8' will promote expansion cone 2', expansion cone 2' and connecting rod 1' is slided to the direction away from end socket 6', and in sliding process, the expansion arc 3' of expansion cone 2' applies pressure to the tube wall of expansion tube 4', make expansion tube 4' produce plastic strain, reach the object of expansion.

In expandable casing patching device, the external diameter of pressure chamber 8' is the maximum gauge of package unit, the external diameter equaling expansion cone 2' adds the wall thickness of the pressure chamber 8' of twice, pressure chamber 8' will bear high pressure, wall thickness can not be less than 5 millimeters, expansion cone 2' is the main tool that expansion tube 4' is expanded, and after expansion tube 4' expands, the internal diameter of patching tube equals the external diameter of expansion cone 2' substantially.

When carrying out the subsidy of patching tube secondary, secondary patch device needs to pass through from former patching tube, the external diameter of its pressure chamber must be less than the internal diameter of former patching tube, then in pressure chamber, the external diameter of expansion cone is less than the internal diameter of former patching tube, after secondary is subsidized, the internal diameter of secondary patching tube is less than the internal diameter of former patching tube, by oil exploitation work follow-up for impact.

Therefore, how increasing the internal diameter of the secondary patching tube of patching tube, is the technical problem that those skilled in the art is badly in need of solving at present.

Summary of the invention

The object of this invention is to provide a kind of reexpansion patch device crossing patching tube, when this reexpansion patch device carried out the subsidy of patching tube secondary, the internal diameter of secondary patching tube was larger.

In order to realize above-mentioned technical purpose, the invention provides a kind of reexpansion patch device crossing patching tube, comprise hydraulic system, expansion tube and expansion cone, the external diameter of expansion cone described in three is maximum, described expansion cone comprises swollen cone and lower swollen cone, and described swollen cone is relative with the conical surface of described lower swollen cone, and the coning angle of described swollen cone is less than the coning angle of described lower swollen cone, described expansion tube is positioned at therebetween, and described hydraulic system can drive described swollen cone and described lower swollen cone relative motion.

Preferably, described hydraulic system comprises central tube and is sleeved on the slip cap on described central tube, and during the two relative sliding, its bonding surface has the hydraulic cavities of variable volume, and described central tube has the intercommunicating pore of described hydraulic cavities; The lower end of described central tube connects described lower swollen cone, and described swollen tapered sleeve is contained in outside described central tube, supports the lower end of described slip cap.

Preferably, described hydraulic system is two-stage hydraulic system, comprising: the lower hydraulic pressure chamber that upper hydraulic cavities, lower center tube and the lower slider cover that upper center tube and upper slip cap are formed is formed; The lower end of described upper center tube connects the upper end of described lower center tube, and the lower end of described lower center tube connects described lower swollen cone; Described swollen cone supports the lower end of described lower slider cover, and the lower end of described upper slip cap is supported in the upper end of described lower slider cover.

Preferably, the upper end of described upper center tube connects top connection, the external diameter of described top connection is greater than the external diameter of described upper center tube, the inner ring of described upper slip cap is stepped, form described upper hydraulic cavities with the outer ring of described top connection and described upper center tube, described upper center tube has the first intercommunicating pore of described upper hydraulic cavities.

Preferably, the upper end of described lower center tube is greater than body, the internal thread of its upper end is threaded with the lower end of described upper center tube, and the described inner ring of lower slider cover and the outer ring of described lower center tube form described lower hydraulic pressure chamber, and described lower center tube has the second intercommunicating pore of described lower hydraulic pressure chamber.

Preferably, the aperture of the centre bore of described upper center tube and described lower center tube is equal, the external diameter of described upper slip cap and described lower slider cover is equal, and is all less than the maximum outside diameter of described swollen cone, and the maximum outside diameter of described swollen cone is less than the maximum outside diameter of described lower swollen cone.

Preferably, the maximum outside diameter of described swollen cone is less than the maximum outside diameter 0.5 millimeter of described lower swollen cone, and the coning angle of described swollen cone is less than the coning angle 10 degree of described lower swollen cone.

Preferably, also comprise pull bar, the lower end of described lower center tube connects the upper end of described pull bar, and described lower swollen cone is installed in the lower end of described pull bar, and described pull bar is arranged in the through hole of described expansion tube.

Preferably, described upper slip cap and described lower slider cover both one of there is pressure relief vent, when described swollen cone and described lower swollen cone relative movement predetermined stroke, described pressure relief vent can be described upper hydraulic cavities or described lower hydraulic pressure chamber release.

Preferably, the predetermined stroke of described swollen cone and described lower swollen cone relative movement is more than or equal to 50 millimeters.

The reexpansion patch device crossing patching tube provided by the invention, comprise hydraulic system, expansion tube and expansion cone, in three, the external diameter of expansion cone is maximum, expansion cone comprises swollen cone and lower swollen cone, upper swollen cone is relative with the conical surface of lower swollen cone, the coning angle of upper swollen cone is less than the coning angle of lower swollen cone, and expansion tube is positioned at therebetween, and hydraulic system can drive swollen cone and lower swollen cone relative motion.

During the work of reexpansion patch device, the position needing secondary to subsidize first is arrived by former patching tube, then primer fluid pressing system drives upper swollen cone and lower swollen cone relative motion, upper swollen cone is relative with the conical surface of lower swollen cone, during the two relative motion, the conical surface extrusion expansion pipe in opposite directions of the two, the coning angle of upper swollen cone is less than the coning angle of lower swollen cone, upper swollen cone is than being easier to get into expansion tube, after going up swollen cone and lower swollen cone relative motion one segment distance, the upper end of expansion tube is by the upper swollen cone expansion one section horn mouth identical with upper swollen cone external diameter, then this device is carried on, expansion tube will be up along with this device, after horn mouth upper surface contacts with former patching tube lower surface, expansion tube is anchored, continuation is carried this device, lower swollen cone will be drawn into expansion tube, after lower swollen cone pulls out expansion tube completely, subsidy completes.

In this device, the external diameter of expansion cone is maximum, and the external diameter of expansion cone is slightly less than the internal diameter of former patching tube can smoothly by former patching tube, and the external diameter of expansion cone is the internal diameter of secondary patching tube, then the internal diameter of secondary patching tube is substantially identical with the internal diameter of former patching tube.When this reexpansion patch device carried out the subsidy of patching tube secondary, the internal diameter of secondary patching tube is comparatively large, is of value to follow-up oil extraction operation.

Concrete, hydraulic system comprises central tube and is sleeved on the slip cap on central tube, and during the two relative sliding, its bonding surface has the hydraulic cavities of variable volume, and central tube has the intercommunicating pore of hydraulic cavities; The lower end of central tube connects lower swollen cone, and upper swollen tapered sleeve is contained in outside central tube, supports the lower end of slip cap.

Hydraulic system is filled with highly pressurised liquid by the intercommunicating pore of central tube in hydraulic cavities, when hydraulic cavities volume increases, slip cap is along central tube slide downward, promote upper swollen cone to move down simultaneously, when upper swollen cone and lower swollen cone relative motion, the taper seat extrusion expansion pipe in opposite directions of the two, the coning angle of upper swollen cone is less first can be got into expansion tube, after the mobile segment distance of upper swollen cone, above carry this device and complete secondary subsidy.

Further, hydraulic system is two-stage hydraulic system, comprising: the lower hydraulic pressure chamber that upper hydraulic cavities, lower center tube and the lower slider cover that upper center tube and upper slip cap are formed is formed; The lower end of upper center tube connects the upper end of lower center tube, and the lower end of lower center tube connects lower swollen cone; Upper swollen cone supports the lower end of lower slider cover, and the lower end of slip cap is supported in the upper end of lower slider cover.

The relative motion of upper swollen cone and lower swollen cone also can be driven by two-stage hydraulic system, and when the volume of upper hydraulic cavities and lower hydraulic pressure chamber increases, upper slip cap and lower slider cover promote upper swollen cone simultaneously and move down.

In a kind of preferred mode, the maximum outside diameter of upper swollen cone is less than the maximum outside diameter 0.5 millimeter of lower swollen cone, and the coning angle of upper swollen cone is less than the coning angle 10 degree of lower swollen cone, then the maximum outside diameter of lower swollen cone is the maximum outside diameter of whole device.

Further, upper slip cap and lower slider cover both one of there is pressure relief vent, when upper swollen cone and lower swollen cone relative movement predetermined stroke, pressure relief vent can be upper hydraulic cavities or lower hydraulic pressure chamber release.

Expansion tube upper end is by after upper swollen cone expansion one section of horn mouth, and pressure relief vent is upper hydraulic cavities or lower hydraulic pressure chamber release, carries this device then, lower swollen cone is drawn into expansion tube, make expansion tube generation expanded radially, lower swollen cone by after expansion tube, completes secondary subsidy work completely.

Accompanying drawing explanation

Fig. 1 is a kind of structural representation of typical expandable casing patching device;

Fig. 2 is the structural representation crossing a kind of detailed description of the invention of reexpansion patch device of patching tube provided by the present invention;

Fig. 3 is the structural representation of the hydraulic system of the reexpansion patch device shown in Fig. 2;

Fig. 4 is the first working state schematic representation of the reexpansion patch device shown in Fig. 2;

Fig. 5 is the second working state schematic representation of the reexpansion patch device shown in Fig. 2.

Wherein, the Reference numeral in Fig. 1 is as follows:

Connecting rod 1'; Expansion cone 2'; Expansion arc 3'; Expansion tube 4'; Pressure cylinder 5'; End socket 6'; Groove 7'; Pressure chamber 8';

Reference numeral in Fig. 2 to Fig. 5 is as follows:

Central tube 11; Upper center tube 111; Lower center tube 112;

Slip cap 12; Upper slip cap 121; Lower slider cover 122;

Hydraulic cavities 13; Upper hydraulic cavities 131; Lower hydraulic pressure chamber 132;

First intercommunicating pore 161; Second intercommunicating pore 162;

Pull bar 14; Top connection 15; Pressure relief vent 17;

Expansion cone 3; Upper swollen cone 31; Lower swollen cone 32;

Expansion tube 2; Former patching tube 4; Down-hole casing 5; Secondary patching tube 6.

Detailed description of the invention

Core of the present invention is to provide a kind of reexpansion patch device crossing patching tube, and when this reexpansion patch device carried out the subsidy of patching tube secondary, the internal diameter of secondary patching tube was larger.

In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.

Please refer to Fig. 2 to Fig. 5, Fig. 2 is the structural representation crossing a kind of detailed description of the invention of reexpansion patch device of patching tube provided by the present invention, Fig. 3 is the structural representation of the hydraulic system of the reexpansion patch device shown in Fig. 2, Fig. 4 is the first working state schematic representation of the reexpansion patch device shown in Fig. 2, and Fig. 5 is the second working state schematic representation of the reexpansion patch device shown in Fig. 2.

In a kind of concrete embodiment, the invention provides a kind of reexpansion patch device crossing patching tube, comprise hydraulic system, expansion tube 2 and expansion cone 3, in three, the external diameter of expansion cone 3 is maximum, expansion cone 3 comprises swollen cone 31 and lower swollen cone 32, and upper swollen cone 31 is relative with the conical surface of lower swollen cone 32, and the coning angle of upper swollen cone 31 is less than the coning angle of lower swollen cone 32, expansion tube 2 is positioned at therebetween, and hydraulic system can drive swollen cone 31 and the relative motion of lower swollen cone 32.

During the work of this reexpansion patch device, first arrive by former patching tube 4 position that down-hole casing 5 needs secondary to subsidize, then primer fluid pressing system drives upper swollen cone 31 and the relative motion of lower swollen cone 32, upper swollen cone 31 is relative with the conical surface of lower swollen cone 32, and expansion tube 2 is positioned at therebetween, during the two relative motion, the conical surface extrusion expansion pipe 2 in opposite directions of the two, coning angle due to upper swollen cone 31 is less than the coning angle of lower swollen cone 32, and upper swollen cone 31 gets into expansion tube 2 than being easier to; After upper swollen cone 31 and lower swollen cone 32 relative motion one segment distance, the upper end of expansion tube 2 is by the upper swollen cone 31 expansion one section horn mouth identical with upper swollen cone 31 external diameter; Then carry whole device on, expansion tube 2 will be up along with this device, and after horn mouth upper surface contacts with former patching tube 4 lower surface, expansion tube 2 is anchored; Continuation is carried this device, lower swollen cone 32 will be drawn into expansion tube 2, make expansion tube 2 that expanded radially occur, and lower swollen cone 32 is completely by after expansion tube 2, and secondary has been subsidized.

In this device, the external diameter of expansion cone 3 is maximum, when the external diameter of expansion cone 3 is slightly less than the internal diameter of former patching tube 4, whole device can pass through former patching tube 4 smoothly, and the external diameter of expansion cone 3 is the internal diameter of secondary patching tube 6, then the internal diameter of secondary patching tube 6 is substantially identical with the internal diameter of former patching tube 4.When this reexpansion patch device carried out the subsidy of patching tube secondary, the internal diameter of secondary patching tube 6 is larger, be of value to normally carrying out of the operations such as follow-up oil recovery, volume increase, because secondary patching tube internal diameter can realize substantially identical with former patching tube internal diameter, ensure that the downhole tool of the original dimension series of oil-water well still can continue normal use after the subsidy of enforcement secondary.

Concrete, hydraulic system comprises central tube 11 and is sleeved on the slip cap 12 on central tube 11, and during the two relative sliding, its bonding surface has the hydraulic cavities 13 of variable volume, and central tube 11 has the intercommunicating pore of hydraulic cavities 13; The lower end of central tube 11 connects lower swollen cone 32, and upper swollen cone 31 is sleeved on outside central tube 11, supports the lower end of slip cap 12.

During the work of this reexpansion patch device, hydraulic system is filled with highly pressurised liquid by the intercommunicating pore of central tube 11 in hydraulic cavities 13, when the volume of hydraulic cavities 13 increases, slip cap 12, along central tube 11 slide downward, promotes upper swollen cone 31 simultaneously and moves down, when upper swollen cone 31 and lower swollen cone 32 relative motion, the taper seat extrusion expansion pipe 2 in opposite directions of the two, the coning angle of upper swollen cone 31 is less first can be got into expansion tube 2, after upper swollen cone 31 moves a segment distance, above carries this device and completes secondary subsidy.

One preferred embodiment in, the relative motion of upper swollen cone 31 and lower swollen cone 32 also can be driven by two-stage hydraulic system, also can be multistage hydraulic system, wherein, a kind of concrete structure of two-stage hydraulic system comprises: the lower hydraulic pressure chamber 132 that upper hydraulic cavities 131, lower center tube 112 and the lower slider cover 122 that upper center tube 111 and upper slip cap 121 are formed is formed; The lower end of upper center tube 111 connects the upper end of lower center tube 112, and the lower end of lower center tube 112 connects lower swollen cone 32; Upper swollen cone 31 supports the lower end of lower slider cover 122, and the lower end of slip cap 121 is supported in the upper end of lower slider cover 122.

During two-stage hydraulic work system, when the volume of upper hydraulic cavities 131 and lower hydraulic pressure chamber 132 increases, upper slip cap 121 and lower slider cover 122 promote upper swollen cone 31 simultaneously and move down, and two-stage hydraulic system can produce larger active force.

In embodiment concrete further, the upper end of upper center tube 111 connects top connection 15, the external diameter of top connection 15 is greater than the external diameter of upper center tube 111, the inner ring of upper slip cap 121 is stepped, form upper hydraulic cavities 131 with the outer ring of top connection 15 and upper center tube 111, upper center tube 111 has the first intercommunicating pore 161 of upper hydraulic cavities 131.

The inner ring of upper slip cap 121 can arrange a step, also can arrange two steps, as shown in Figure 3, arranges sealing ring, hydraulic cavities 131 in sealing at upper slip cap 121 with the bonding surface of top connection 15 and upper center tube 111.Highly pressurised liquid can enter upper hydraulic cavities 131 by the first intercommunicating pore 161, and when the volume of upper hydraulic cavities 131 increases, upper slip cap 121 moves down along upper center tube 111.

In further concrete embodiment, the upper end of lower center tube 112 is greater than body, the internal thread of its upper end is threaded with the lower end of upper center tube 111, the lower slider cover inner ring of 122 and the outer ring of lower center tube 112 form lower hydraulic pressure chamber 132, and lower center tube 112 has the second intercommunicating pore 162 of lower hydraulic pressure chamber 132.

The outer ring of lower center tube 112 can arrange a step, also can arrange two steps, as shown in Figure 3, arranges sealing ring at lower slider cover 122 with the bonding surface of lower center tube 112, sealing lower hydraulic pressure chamber 132.Highly pressurised liquid can enter lower hydraulic pressure chamber 132 by the second intercommunicating pore 162, and when the volume of lower hydraulic pressure chamber 132 increases, lower slider cover 122 moves down along lower center tube 112.

Concrete, the aperture of the centre bore of upper center tube 111 and lower center tube 112 is equal, and the external diameter of upper slip cap 121 and lower slider cover 122 is equal, and is all less than the maximum outside diameter of swollen cone 31, and the maximum outside diameter of upper swollen cone 31 is less than the maximum outside diameter of lower swollen cone 32.

During two-stage hydraulic work system, highly pressurised liquid enters upper hydraulic cavities 131 and lower hydraulic pressure chamber 132 respectively by the first intercommunicating pore 161 and the second intercommunicating pore 162, and upper slip cap 121 and lower slider cover 122 move down simultaneously, and the upper swollen cone 31 of promotion moves down.

In another kind of concrete embodiment, the maximum outside diameter of upper swollen cone 31 can be less than the maximum outside diameter 0.5 millimeter of lower swollen cone 32, and the coning angle of upper swollen cone 31 can be less than the coning angle 10 degree of lower swollen cone 32.

The maximum outside diameter of this device is the face of cylinder of lower swollen cone 32, the face of cylinder of lower swollen cone 32 is less than former patching tube 4 internal diameter 0.5 millimeter ~ 1 millimeter, the length on this face of cylinder is no more than 100 millimeters, this device is easily via former patching tube 4, arrive down the precalculated position of down-hole casing 5, the internal diameter of secondary patching tube 6 is less than the internal diameter 0.5 millimeter ~ 1 millimeter of former patching tube 4.In order to avoid overlapping with former patching tube 4, when calculating precalculated position, a segment distance can be reserved.

Hydraulic system produce active force make swollen cone 31 and lower swollen cone 32 in opposite directions extrusion expansion pipe 2 time, the angle of upper swollen cone 31 coning angle is less, and external diameter is also smaller, makes swollen cone 31 more easily be got into expansion tube 2.

Concrete, reexpansion patch device can also comprise pull bar 14, the upper end of the lower end cylinder lever connecting rod 14 of lower center tube 112, and lower swollen cone 32 is installed in the lower end of pull bar 14, and pull bar 14 is arranged in the through hole of expansion tube 2.As shown in Figure 2, lower center tube 112 installs lower swollen cone 32 by pull bar 14, and can shorten the length of lower center tube 112, the length of lower center tube 112 meets the stroke of upper swollen cone 31.

In another preferred embodiment, upper slip cap 121 and lower slider cover 122 both one of there is pressure relief vent 17, when upper swollen cone 31 and lower swollen cone 32 relative movement predetermined stroke, pressure relief vent 17 can be upper hydraulic cavities 131 or lower hydraulic pressure chamber 132 release.

When upper swollen cone 31 and lower swollen cone 32 relative movement predetermined stroke, pressure relief vent 17 is through the sealing ring of upper hydraulic cavities 131 or lower hydraulic pressure chamber 132, the pressure of upper hydraulic cavities 131 or lower hydraulic pressure chamber 132 declines suddenly, now expansion tube 2 upper end is by the upper swollen cone 31 expansion horn mouth identical with predetermined stroke, after pressure is laid down, on carry this device, complete secondary subsidy.

As shown in Figure 3, pressure relief vent 17 is positioned on lower slider cover 122, and when pressure relief vent 17 is after the sealing ring on the upside of lower hydraulic pressure chamber 132, the pressure of lower hydraulic pressure chamber 132 can decline suddenly.

Concrete, the predetermined stroke of upper swollen cone 31 and the relative movement of lower swollen cone 32 can be 50 millimeters, also can be greater than 50 millimeters.When the stroke of upper swollen cone 31 reaches the predetermined stroke of design, upper hydraulic cavities 131 or lower hydraulic pressure chamber 132 release, then, on carry this device.

Above the reexpansion patch device crossing patching tube provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.

Claims (10)

1. cross the reexpansion patch device of patching tube for one kind, comprise hydraulic system, expansion tube (2) and expansion cone (3), it is characterized in that, the external diameter of expansion cone described in three (3) is maximum, described expansion cone (3) comprises swollen cone (31) and lower swollen cone (32), described swollen cone (31) is relative with the conical surface of described lower swollen cone (32), the coning angle of described swollen cone (31) is less than the coning angle of described lower swollen cone (32), described expansion tube (2) is positioned at described swollen cone (31), between described lower swollen cone (32), described hydraulic system can drive described swollen cone (31) and the relative motion of described lower swollen cone (32).
2. the reexpansion patch device crossing patching tube as claimed in claim 1, it is characterized in that, described hydraulic system comprises central tube (11) and is sleeved on the slip cap (12) on described central tube (11), during the two relative sliding, its bonding surface has the hydraulic cavities (13) of variable volume, and described central tube (11) has the intercommunicating pore of described hydraulic cavities (13); The lower end of described central tube (11) connects described lower swollen cone (32), and described swollen cone (31) is sleeved on described central tube (11) outside, supports the lower end of described slip cap (12).
3. the reexpansion patch device crossing patching tube as claimed in claim 2, it is characterized in that, described hydraulic system is two-stage hydraulic system, comprising: the lower hydraulic pressure chamber (132) that the upper hydraulic cavities (131) that upper center tube (111) and upper slip cap (121) are formed, lower center tube (112) and lower slider cover (122) are formed; The lower end of described upper center tube (111) connects the upper end of described lower center tube (112), and the lower end of described lower center tube (112) connects described lower swollen cone (32); Described swollen cone (31) supports the lower end of described lower slider cover (122), and the lower end of described upper slip cap (121) is supported in the upper end of described lower slider cover (122).
4. the reexpansion patch device crossing patching tube as claimed in claim 3, it is characterized in that, the upper end of described upper center tube (111) connects top connection (15), the external diameter of described top connection (15) is greater than the external diameter of described upper center tube (111), the inner ring of described upper slip cap (121) is stepped, form described upper hydraulic cavities (131) with the outer ring of described top connection (15) and described upper center tube (111), described upper center tube (111) has first intercommunicating pore (161) of described upper hydraulic cavities (131).
5. the reexpansion patch device crossing patching tube as claimed in claim 3, it is characterized in that, the upper end of described lower center tube (112) is greater than body, the internal thread of its upper end is threaded with the lower end of described upper center tube (111), the inner ring of described lower slider cover (122) and the outer ring of described lower center tube (112) form described lower hydraulic pressure chamber (132), and described lower center tube (112) has second intercommunicating pore (162) of described lower hydraulic pressure chamber (132).
6. the reexpansion patch device crossing patching tube as described in any one of claim 3 to 5, it is characterized in that, the aperture of the centre bore of described upper center tube (111) and described lower center tube (112) is equal, the external diameter of described upper slip cap (121) and described lower slider cover (122) is equal, and being all less than the maximum outside diameter of described swollen cone (31), the maximum outside diameter of described swollen cone (31) is less than the maximum outside diameter of described lower swollen cone (32).
7. the reexpansion patch device crossing patching tube as claimed in claim 6, it is characterized in that, the maximum outside diameter of described swollen cone (31) is less than the maximum outside diameter 0.5 millimeter of described lower swollen cone (32), and the coning angle of described swollen cone (31) is less than the coning angle 10 degree of described lower swollen cone (32).
8. the reexpansion patch device crossing patching tube as claimed in claim 7, it is characterized in that, also comprise pull bar (14), the lower end of described lower center tube (112) connects the upper end of described pull bar (14), described lower swollen cone (32) is installed in the lower end of described pull bar (14), and described pull bar (14) is arranged in the through hole of described expansion tube (2).
9. the reexpansion patch device crossing patching tube as described in any one of claim 3 to 5, it is characterized in that, described upper slip cap (121) and described lower slider cover (122) the two one of there is pressure relief vent (17), when described swollen cone (31) and described lower swollen cone (32) relative movement predetermined stroke, described pressure relief vent (17) can be described upper hydraulic cavities (131) or described lower hydraulic pressure chamber (132) release.
10. the reexpansion patch device crossing patching tube as claimed in claim 8, it is characterized in that, the predetermined stroke of described swollen cone (31) and the relative movement of described lower swollen cone (32) is more than or equal to 50 millimeters.
CN201310228800.4A 2013-06-08 2013-06-08 A kind of reexpansion patch device crossing patching tube CN103291238B (en)

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CN103790537B (en) * 2014-01-22 2016-06-29 胜利油田现河工贸有限责任公司 Liner tubing repair tension device and renovation technique thereof
CN104831112B (en) * 2015-05-19 2017-08-25 无锡源创机械科技有限公司 A kind of copper-based memory alloy patching tube and preparation method thereof, subsidy method and purposes
CN108104754B (en) * 2017-05-09 2020-06-09 中国石油天然气股份有限公司 Casing patching device and method

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CN102996089A (en) * 2012-11-24 2013-03-27 西南石油大学 Multi-stage hydraulic expansion tail pipe suspension system with reducing expansion cone for horizontal well for thermal recovery of heavy oil
CN203362089U (en) * 2013-06-08 2013-12-25 华鼎鸿基石油工程技术(北京)有限公司 Secondary expansion patching device passing patching tube

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