CN203239273U - Down-hole packer based on shape memory materials - Google Patents
Down-hole packer based on shape memory materials Download PDFInfo
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- CN203239273U CN203239273U CN 201320120290 CN201320120290U CN203239273U CN 203239273 U CN203239273 U CN 203239273U CN 201320120290 CN201320120290 CN 201320120290 CN 201320120290 U CN201320120290 U CN 201320120290U CN 203239273 U CN203239273 U CN 203239273U
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Abstract
Provided is a down-hole packer based on shape memory materials. According to the down-hole packer based on the shape memory materials, a rubber cylinder made of shape memory polymer materials is sleeved on a pipe body, a telescopic spiral pipe is arranged in the rubber cylinder in an embedded mode, liquid inlet holes are formed in the side wall of the pipe body, a fixed end assembly is sleeved on the pipe body, is connected with the upper end of the rubber cylinder, and comprises a fixed end limiting ring and a center coupling which is connected with the rubber cylinder, a liquid inlet channel is formed in the center coupling, one end, penetrating out of the upper end of the rubber cylinder, of the telescopic spiral pipe is communicated with the liquid inlet channel in an opposite mode, a flow pass sliding sleeve is arranged in the fixed end limiting ring in a penetrating connection mode, the liquid inlet holes of the pipe body are opposite to the flow pass sliding sleeve, a floating end assembly comprises a floating end limiting ring, the floating end limiting ring is sleeved on the pipe body, and is connected with the lower end of the rubber cylinder, a liquid outlet channel is formed in the floating end limiting ring, and one end, penetrating out of the lower end of the rubber cylinder, of the telescopic spiral pipe is communicated with the liquid outlet channel in an opposite mode. The down-hole packer based on the shape memory materials can meet the requirements for well completion of complex wells with different conditions, and is controllable in setting, small in integral dimension and simple in structure.
Description
Technical field
The utility model is relevant for a kind of downhole packer, especially relevant for the downhole packer based on shape-memory material of a kind of natural petroleum gas field with Oil/gas Well.
Background technology
Along with the demand of national economy to the petroleum gas energy constantly increases, the petrol resources exploitation object is by turning to gradually conventional resource and unconventional resource to lay equal stress on take conventional resource as main.Simultaneously, the well type of exploitation oil-gas reservoir becomes increasingly complex, and such as extended horizontal well, multilateral well etc., these have all proposed very high requirement to the completion tool that comprises packer.Packer is the important down-hole zone isolation instrument of oil-gas mining, is widely used in the fields such as completion, oil recovery, water filling, reservoir reconstruction, underground work.
At present, packer mainly comprises two kinds of compression and expandings take mechanical type as main.Wherein, the operating principle of compression packer be by suppress, the mode such as pitching improves overpressure, makes central tube cut off pin and motion to strut slips, slips is bitten internal surface of sleeve pipe and is lived packer with seat, packing element is compressed simultaneously, reaches the purpose of sealing oil jacket annular space.The operating principle of inflatable packer is when overpressure rises to a certain value, the control valve of packer inside is opened, liquid enters in the space between packing element and the parent tube, packing element expands outwardly and touch internal surface of sleeve pipe under the effect of hydraulic pressure, sealing oil jacket annular space, under the effect of this packer internal locking mechanism, the packing element setting state of can remaining valid.Also there are a lot of deficiencies in existing mechanical packer: it is relatively poor to set reliability, and cost is higher, and size is larger, complex structure and cause the down-hole to enter difficulty, and construction risk is higher, the defectives such as open hole well bad adaptability.
Except mechanical packer, Self-expandable packer also has been used in a large scale gradually in recent years.This instrument does not have complicated frame for movement, the packing element oil suction or the imbibition that only depend on special rubber to make come setting, site construction technology is easy, still, this Self-expandable packer exist setting uncontrollable, setting, performance is subjected in the pit shaft shortcomings such as liquid property affects immediately.
Therefore, be necessary to provide a kind of new downhole packer, overcome defects.
The utility model content
The purpose of this utility model provides a kind of downhole packer based on shape-memory material, and it can satisfy the completion demand of the complex structural well of different well ' s conditions, and it sets controlled, and overall dimensions is little, and is simple in structure.
Above-mentioned purpose of the present utility model can adopt following technical proposal to realize:
The utility model provides a kind of downhole packer based on shape-memory material, and described downhole packer based on shape-memory material comprises:
Body, its outer cover is provided with the packing element of being made by shape memory polymer material, is embedded with the retractable spiral pipe in the described packing element, offers inlet opening on the upper end sidewall of described body;
The fixed end assembly, it is set on the described body and is connected to the upper end of described packing element, described fixed end assembly has fixed end spacing ring and the transition joint that links to each other with described fixed end spacing ring, described transition joint links to each other with described packing element, described transition joint has feed pathway, described retractable spiral pipe passes be communicated with relative with described feed pathway of an end of described packing element upper end, wear in the described fixed end spacing ring and be connected with the overcurrent sliding sleeve, the inlet opening of described body is relative with described overcurrent sliding sleeve;
The floating end assembly, it has the floating end spacing ring, described floating end spacing ring is set on the described body and is connected to the lower end of described packing element, and described floating end spacing ring has liquid outlet channel, and described retractable spiral pipe passes be communicated with relative with described liquid outlet channel of an end of described packing element lower end.
In preferred embodiment, be formed with the feed liquor ring cavity between described transition joint and the described body, described feed liquor ring cavity is connected with described feed pathway, is provided with one way valve in it, and described one way valve comprises:
Valve body, it is set on the described body, and described valve body has the feed liquor through hole, and described feed liquor through hole is connected with described feed pathway;
Valve seat, it is arranged on the bottom of described feed liquor through hole, offers through hole on the described valve seat, and described through hole is connected with described feed liquor through hole;
Valve ball, it is arranged on the top of described feed liquor through hole, is folded with spring between described valve ball and described valve seat, described valve ball by described spring contact on described valve body.
In preferred embodiment, the upper end of described valve body is provided with screen pack.
In preferred embodiment, described overcurrent sliding sleeve is connected on the described fixed end spacing ring by cutting off pin, described overcurrent sliding sleeve has flowing hole, be formed with the overcurrent chamber between described overcurrent sliding sleeve and the described body, described overcurrent chamber is connected with described inlet opening, cut off that pin is cut off and axial lower the shifting out under the state of described fixed end spacing ring of the flowing hole of described overcurrent sliding sleeve described, described inlet opening is connected with described feed pathway by the flowing hole of described overcurrent sliding sleeve.
In preferred embodiment, between described body and described floating end spacing ring, be provided with the opening baffle ring, described opening baffle ring is made by shape memory alloy material.
In preferred embodiment, the lower surface of described transition joint is provided with a plurality of dentation connecting portions, and described a plurality of dentation connecting portions are embedded in described packing element.
In preferred embodiment, the upper surface of described floating end spacing ring is provided with a plurality of dentation connecting portions, and described a plurality of dentation connecting portions are embedded in described packing element.
In preferred embodiment, between described fixed end spacing ring and the described body, between described overcurrent sliding sleeve and the described body, between described floating end spacing ring and the described body and be respectively equipped with a plurality of sealing rings between described overcurrent sliding sleeve and the described fixed end spacing ring.
In preferred embodiment, be respectively equipped with a plurality of sealing rings between described valve body and the described body and between described valve body and the described transition joint.
Characteristics and the advantage of the downhole packer based on shape-memory material of the present utility model are:
(1) the field operation risk is low: according to the characteristic of shape memory polymer material, the external diameter of the packing element that this shape memory polymer material makes is significantly reduced than conventional packer packing element, the down-hole annular gap increases, this for the down-hole trafficability characteristic that improves packer, avoid the jam accident of work progress significant;
(2) compliance is good: the transition temperature of shape memory polymer material and shape memory alloy material can be regulated according to different conditions down-hole, can satisfy the completion demand under the different well depth conditions, also be, the size of packing element can customize, according to actual borehole size, the packing element external diameter is reduced to enough little, with guarantee the process of going into the well smoothly;
(3) simple in structure: as not have machine structural parts complicated on the compression packer such as slips, make packing element deformation, setting by the intrinsic characteristic of shape-memory material itself, reduce many constructions accidents, the reliability height;
(4) setting controlled: shape memory polymer material and shape memory alloy material are only to responsive to temperature, insensitive to the fluid media (medium) in the pit shaft, control packing element deformation by triggering liquid from ground to pumped downhole high temperature, its setting process is controlled by ground, is not subjected to the impact of downhole fluid properties to avoid go into the well in process premature inflation or affected by high salinity and non-bloating problem of traditional Self-expandable packer fully;
(5) latus rectum is large: identical with the tubing and casing that is connected, be conducive to improve output, and be convenient to being lowered to of later stage power tool.
Downhole packer based on shape-memory material of the present utility model, overall dimensions is less, simple in structure, setting controlled, bore hole compliance is good, can satisfy the complex structural well of different well ' s conditions, such as horizontal well, high angle hole, multilateral well, extended reach well etc., and all kinds of on-the-spot down-holes technique, underground work such as completion, oil recovery, water filling, reservoir reconstruction.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the front view of the downhole packer based on shape-memory material of the present utility model.
Fig. 2 is that the master of the downhole packer based on shape-memory material of the present utility model looks sectional view.
Fig. 3 is that the master that the downhole packer based on shape-memory material of the present utility model removes packing element looks sectional view.
Fig. 4 is the A section enlarged drawing of Fig. 2.
Fig. 5 is the B section enlarged drawing of Fig. 2.
Fig. 6 is the stereogram of the transition joint of the downhole packer based on shape-memory material of the present utility model.
Fig. 7 is the side view cutaway drawing of the transition joint of the downhole packer based on shape-memory material of the present utility model.
Fig. 8 is the stereogram of the floating end spacing ring of the downhole packer based on shape-memory material of the present utility model.
The specific embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, 2, the utility model provides a kind of downhole packer based on shape-memory material, and it comprises body 1, fixed end assembly 2 and floating end assembly 3.Wherein: the outer cover of body 1 is provided with the packing element 11 of being made by shape memory polymer material, is embedded with retractable spiral pipe 12 in the described packing element 11, offers inlet opening 13 on the upper end sidewall of described body 1; Fixed end assembly 2 is set on the described body 1 and is connected to the upper end of described packing element 11, described fixed end assembly 2 has fixed end spacing ring 21 and the transition joint 22 that links to each other with described fixed end spacing ring 21, described transition joint 22 links to each other with described packing element 11, described transition joint 22 has feed pathway 221, described retractable spiral pipe 12 passes an end and described feed pathway 221 relative connections of described packing element 11 upper ends, wear in the described fixed end spacing ring 21 and be connected with overcurrent sliding sleeve 23, the inlet opening 13 of described body 1 is relative with described overcurrent sliding sleeve 23; Floating end assembly 3 has floating end spacing ring 31, described floating end spacing ring 31 is set on the described body 1 and is connected to the lower end of described packing element 11, described floating end spacing ring 31 has liquid outlet channel 311, and described retractable spiral pipe 12 passes an end and described liquid outlet channel 311 relative connections of described packing element 11 lower ends.
Specifically, body 1 is API oil pipe or sleeve pipe, and it is cylinder barrel shaped substantially, and the upper end of body 1 can link to each other with downhole tool by tubing coupling 4.In the present embodiment, the diameter of body 1 is about the 140mm(5.5 inch).
In the utility model, packing element 11 is made by shape-memory polymer (SMP) material.The characteristic of shape memory polymer material is, significantly shows as at normal temperatures elasticity, and on uniform temperature, significantly shows as plasticity, but random variation, this temperature is the transition temperature of shape memory polymer material.When shape memory polymer material being heated on its transition temperature, make it be deformed into required form to this shape memory polymer material imposed load, keep this load and reduce temperature to room temperature, form will keep after this material unloading, afterwards, temperature is heated on the transition temperature, shape memory polymer material will recover the initial configuration before the deformation again.The Deformation Law of this shape memory polymer material is, the volume of shape memory polymer material do not change (related data of relevant shape memory polymer material can reference: Zhang Sheng, the progress polymer material science of the thermotropic shape memory high molecule materials such as Luo Haiya and engineering 2008(8) in deformation process).
Please cooperate referring to Fig. 4, the fixed end spacing ring 21 of fixed end assembly 2 is set on the body 1, and the periphery wall of its upper end inside wall and body 1 closely cooperates, and is formed with annular chamber between its lower end and the body 1, and overcurrent sliding sleeve 23 is arranged in this annular chamber; The transition joint 22 of fixed end assembly 2 is threaded in the lower end of fixed end spacing ring 21, it is set on the body 1, the lower end of transition joint 22 is fixedly connected with packing element 11, feed pathway 221 is opened in the sidewall of transition joint 22, its lower end is relative with packing element 11, and this feed pathway 221 is connected with the inlet opening 13 of body 1 by overcurrent sliding sleeve 23.
In the utility model, overcurrent sliding sleeve 23 is connected on the fixed end spacing ring 21 by cutting off pin 211, is formed with overcurrent chamber 231 between itself and the body 1, offers flowing hole 232 on the overcurrent sliding sleeve 23, and flowing hole 232 is connected with overcurrent chamber 231.Cutting off under the state that pin 211 do not cut off, the be fixed inside wall of end spacing ring 21 of the flowing hole 232 of overcurrent sliding sleeve 23 blocks, can be from flowing hole 232 outflows from the liquid that body 1 inlet opening 13 flows in the overcurrent sliding sleeves 23 overcurrent chambeies 231; Pin 211 is cut off and the flowing hole of overcurrent sliding sleeve 23 232 axial lower shifting out under the state of fixed end spacing ring 21 when cutting off, also be, the flowing hole 232 of overcurrent sliding sleeve 23 no longer is subjected to stopping of fixed end spacing ring 21 inside walls, at this moment, behind the liquid process overcurrent chamber 231 of fluent cover 23 that body 1 inlet opening 13 injects, flow into transition joint 22 from the flowing hole 232 of overcurrent sliding sleeve 23, then the feed pathway 221 from transition joint 22 flows out.The retractable spiral pipe 12 that is embedded in packing element 11 passes an end and feed pathway 221 relative connections of packing element 11 upper ends, thereby can flow in the retractable spiral pipe 12 from the liquid of feed pathway 221 outflows.In the utility model, retractable spiral pipe 12 can be fixedly linked by the mode of welding with the feed pathway 221 of transition joint 22, certainly, in other embodiment, the upper end of retractable spiral pipe 12 also can be fixedly linked by the feed pathway 221 of the connectors such as union and transition joint 22.
Please cooperate referring to Fig. 5, the floating end spacing ring 31 of floating end assembly 3 is set on the body 1, in the present embodiment, is provided with opening baffle ring 312 between floating end spacing ring 31 and the body 1, and floating end spacing ring 31 is established by opening baffle ring 312 cards and is connected on the body 1.Opening baffle ring 312 is made by marmem (SMA) material, the characteristics of shape memory alloy material are, at its higher transition temperature point processing parts, oneself state when this temperature " is remembered " in the part meeting, after machining, part when normal temperature, may be deformed to required shape, when system works, ambient temperature reached the transition temperature of shape memory alloy material, part restPosed automatically.That is to say, opening baffle ring 312 is adding man-hour, temperature must rise to it more than transition temperature, so that it " remembers " original shape, after machining, at normal temperatures its external diameter is suitably dwindled, with when assembling opening baffle ring 312 can enter in the annular groove that body 1 periphery wall offers and get final product so that floating end spacing ring 31 is fixed with respect to body 1.In the utility model, shape memory alloy material comprises Ni-Ti base, Cu is basic and Fe is basic etc., and its transition temperature can be set according to the down-hole situation (particulars of relevant shape memory alloy material can reference: thunder bamboo virtue iron-base marmem and Material Used exploitation thereof and application 2000(4)).
The liquid outlet channel 311 of floating end spacing ring 31 is opened in floating end spacing ring 31 near in the sidewall of packing element 11, this liquid outlet channel 311 and the outside connected state that forms, be embedded an end and liquid outlet channel 311 relative connections that retractable spiral pipe 12 in packing element 11 passes packing element 11 lower ends, discharge outside the downhole packer based on shape-memory material of the present utility model behind liquid outlet channel 311 thereby can make from the liquid of retractable spiral pipe 12 interior outflows.In the utility model, retractable spiral pipe 12 can be fixedly linked by the mode of welding with the liquid outlet channel 311 of floating end spacing ring 31, certainly, in other embodiment, the lower end of retractable spiral pipe 12 also can be fixedly linked by the liquid outlet channel 311 of the connectors such as union and floating end spacing ring 31.
This field operation technique based on the downhole packer of shape-memory material is as follows: at first, packer is before going into the well, to be heated to by the packing element 11 that shape memory polymer material is made on the transition temperature of shape memory polymer material, packing element 11 imposed loads are made its distortion, also be, axial tension packing element 11, make the outside dimension of packing element 11 be fixed on the state that can make its smooth G.I.H, at this moment, the temperature that keeps this load and reduce packing element 11 is to room temperature, and the form after packing element 11 stretches will be maintained; Afterwards, the downhole packer based on shape-memory material that will have a packing element 11 after this stretching is gone into the well and is put in place, suppressed by ground water filling in the completion tubular column, injected water enters in the overcurrent sliding sleeve 23 from the inlet opening 13 of body 1, rising along with water injection pressure, when pressure rise to cut off pin 211 cut off pressure the time, cutting off pin 211 is cut off, overcurrent sliding sleeve 23 at the effect lower shaft of water injection pressure to moving down, until the flowing hole 232 of overcurrent sliding sleeve 23 shifts out the inside wall of fixed end spacing ring 21, at this moment, injected water passes through the overcurrent chamber 231 of fluent cover 23 from the flowing hole 232 inflow transition joints 22 of overcurrent sliding sleeve 23 from the inlet opening 13 of body 1, and then the feed pathway 221 from transition joint 22 flows in the retractable spiral pipe 12 that is embedded in packing element 11; Afterwards, change injected water into high temperature and trigger liquid, the temperature of this high temperature triggering liquid is higher than the transition temperature of shape memory polymer material and shape memory alloy material, in the utility model, it is that oil field operation (is for example used salt solution that high temperature triggers liquid, potassium chloride), high temperature triggers in the runner of liquid inflow retractable spiral pipe 12, its heat will evenly be passed to whole packing element 11, after packing element 11 temperature reach its transition temperature, packing element 11 begins to occur deformation, and packing element 11 radial dimensions constantly increase, and axial dimension constantly reduces, simultaneously, under high temperature action, shape also occurs and recovers in opening baffle ring 312, and it is large that its external diameter becomes, opening baffle ring 312 " is jumped out " in the groove of body 1, lose the location to floating end assembly 3, floating end assembly 3 begins to follow packing element 11 and moves on axially, until packing element 11 is with till the internal surface of sleeve pipe generation contacts and form effective sealing closely.
In an embodiment of the present utility model, the external diameter of packing element 11 after processing and manufacturing is finished in factory is about 190mm, and length is about 5 meters.The size of the form of packing element 11 after the down-hole is setting is: its external diameter is 254mm, and its length is about 1.5 meters.Should be used for the 216mm(8.5 inch based on downhole packer of shape-memory material) the completion construction of well.Be about 192mm based on the external diameter of the fixed end spacing ring 21 at the downhole packer two ends of shape-memory material and the external diameter of floating end spacing ring 31, the force value of cutting off of cutting off pin 211 is about 20MPa.
Downhole packer based on shape-memory material of the present utility model adopts the structure of " end is fixed, and the other end floats ", to adapt to axial elongation or the shortening of packing element 11 in deformation process.Should have the following advantages and characteristics based on the downhole packer of shape-memory material:
(1) the field operation risk is low: according to the characteristic of shape memory polymer material, the external diameter of the packing element 11 that this shape memory polymer material makes is significantly reduced than conventional packer packing element, the down-hole annular gap increases, this for the down-hole trafficability characteristic that improves packer, avoid the jam accident of work progress significant;
(2) compliance is good: the transition temperature of shape memory polymer material and shape memory alloy material can be regulated according to different conditions down-hole, can satisfy the completion demand under the different well depth conditions, also be, the size of packing element 11 can customize, according to actual borehole size, packing element 11 external diameters are reduced to enough little, with guarantee the process of going into the well smoothly;
(3) simple in structure: as not have machine structural parts complicated on the compression packer such as slips, make packing element 11 deformation, setting by the intrinsic characteristic of shape memory polymer material itself, reduce many constructions accidents, the reliability height;
(4) setting controlled: shape memory polymer material and shape memory alloy material are only to responsive to temperature, insensitive to the fluid media (medium) in the pit shaft, control packing element 11 deformation by triggering liquid from ground to pumped downhole high temperature, its setting process is controlled by ground, is not subjected to the impact of downhole fluid properties to avoid go into the well in process premature inflation or affected by high salinity and non-bloating problem of traditional Self-expandable packer fully;
(5) latus rectum is large: identical with the tubing and casing that is connected, be conducive to improve output, and be convenient to being lowered to of later stage power tool.
Downhole packer based on shape-memory material of the present utility model, overall dimensions is less, simple in structure, setting controlled, bore hole compliance is good, can satisfy the complex structural well of different well ' s conditions, such as horizontal well, high angle hole, multilateral well, extended reach well etc., and all kinds of on-the-spot down-holes technique, underground work such as completion, oil recovery, water filling, reservoir reconstruction.
According to an embodiment of the present utility model, be formed with feed liquor ring cavity 222 between described transition joint 22 and the described body 1, described feed liquor ring cavity 222 is connected with described feed pathway 221, is provided with one way valve 24 in it, and described one way valve 24 comprises valve body 241, valve seat 242 and valve ball 243.Wherein: valve body 241 is set on the described body 1, and described valve body 241 has feed liquor through hole 2411, and described feed liquor through hole 2411 is connected with described feed pathway 221; Valve seat 242 is arranged on the bottom of described feed liquor through hole 2411, offers through hole 2421 on the described valve seat 242, and described through hole 2421 is connected with described feed liquor through hole 2411; Valve ball 243 is arranged on the top of described feed liquor through hole 2411, is folded with spring 244 between described valve ball 243 and described valve seat 242, described valve ball 243 by described spring 244 contact on described valve body 241.
Specifically, valve body 241 is cylindrical tube shape substantially, it closely is set on the body 1 and is threaded in the transition joint 22, offer feed liquor through hole 2411 at valve body 241 sidewalls relative with the feed pathway 221 of transition joint 22, the upper end diameter of this feed liquor through hole 2411 is less than its lower end diameter, thereby at feed liquor through hole 2411 interior formation one taper surfaces; Valve seat 242 is threaded in the lower end of feed liquor through hole 2411, and its upper end is by spring 244 contact valve balls 243, and the upper end contact of valve ball 243 is on the taper surface of feed liquor through hole 2411, to be sealed into fluid through-hole 2411.Behind the feed liquor ring cavity 222 of liquid by the flowing hole 232 inflow transition joints 22 of overcurrent sliding sleeve 23, liquid can flow into from the feed liquor through hole 2411 of one way valve 24, contact valve ball 243 under the effect of hydraulic pressure, valve ball 243 Compress Springs 244, thereby conducting feed liquor through hole 2411, make liquid behind one way valve 24, flow out the feed pathway 221 of transition joint 22, and then flow in the retractable spiral pipe 12.
Further, the upper end of described valve body 241 is provided with screen pack 245, and screen pack 245 is set on the body 1, and screen pack 245 is used for entering the solid phase Impurity removal of the fluid in the one way valve 24, prevents solid phase impurity wearing and tearing important spare part.
See also shown in Fig. 6,7, according to an embodiment of the present utility model, the lower surface of described transition joint 22 is provided with a plurality of dentation connecting portions 223, and described a plurality of dentation connecting portions 223 are embedded in described packing element 11.Further, as shown in Figure 8, the upper surface of described floating end spacing ring 31 is provided with a plurality of dentation connecting portions 313, and described a plurality of dentation connecting portions 313 are embedded in described packing element 11.In the utility model, lower surface in transition joint 22 along the circumferential direction evenly is provided with four dentation connecting portions 223, upper surface in floating end spacing ring 31 along the circumferential direction evenly is provided with four dentation connecting portions 313, those dentation connecting portions 223 and dentation connecting portion 313 embed in the packing element 11 in the process of packing element 11 moulding respectively, thereby make fixed end assembly 2, floating end assembly 3 form reliable and stable being connected with packing element 11.
According to an embodiment of the present utility model, between described fixed end spacing ring 21 and the described body 1, between described overcurrent sliding sleeve 23 and the described body 1, between described floating end spacing ring 31 and the described body 1 and be respectively equipped with a plurality of sealing rings 5 between described overcurrent sliding sleeve 23 and the described fixed end spacing ring 21.Further, be respectively equipped with a plurality of sealing rings 5 between described valve body 241 and the described body 1 and between described valve body 241 and the described transition joint 22.
Those sealing rings 5 are used between sealing fixed end spacing ring 21 and the body 1, between overcurrent sliding sleeve 23 and the body 1, between floating end spacing ring 31 and the body 1, between overcurrent sliding sleeve 23 and the fixed end spacing ring 21, between valve body 241 and the body 1 and slit between valve body 241 and the transition joint 22, prevent the situation generation of filling liquid leakage.
The above only is several embodiment of the present utility model, and those skilled in the art can carry out various changes or modification to the utility model embodiment according to the disclosed content of application documents and not break away from spirit and scope of the present utility model.
Claims (9)
1. the downhole packer based on shape-memory material is characterized in that, described downhole packer based on shape-memory material comprises:
Body, its outer cover is provided with the packing element of being made by shape memory polymer material, is embedded with the retractable spiral pipe in the described packing element, offers inlet opening on the upper end sidewall of described body;
The fixed end assembly, it is set on the described body and is connected to the upper end of described packing element, described fixed end assembly has fixed end spacing ring and the transition joint that links to each other with described fixed end spacing ring, described transition joint links to each other with described packing element, described transition joint has feed pathway, described retractable spiral pipe passes be communicated with relative with described feed pathway of an end of described packing element upper end, wear in the described fixed end spacing ring and be connected with the overcurrent sliding sleeve, the inlet opening of described body is relative with described overcurrent sliding sleeve;
The floating end assembly, it has the floating end spacing ring, described floating end spacing ring is set on the described body and is connected to the lower end of described packing element, and described floating end spacing ring has liquid outlet channel, and described retractable spiral pipe passes be communicated with relative with described liquid outlet channel of an end of described packing element lower end.
2. the downhole packer based on shape-memory material as claimed in claim 1, it is characterized in that be formed with the feed liquor ring cavity between described transition joint and the described body, described feed liquor ring cavity is connected with described feed pathway, be provided with one way valve in it, described one way valve comprises:
Valve body, it is set on the described body, and described valve body has the feed liquor through hole, and described feed liquor through hole is connected with described feed pathway;
Valve seat, it is arranged on the bottom of described feed liquor through hole, offers through hole on the described valve seat, and described through hole is connected with described feed liquor through hole;
Valve ball, it is arranged on the top of described feed liquor through hole, is folded with spring between described valve ball and described valve seat, described valve ball by described spring contact on described valve body.
3. the downhole packer based on shape-memory material as claimed in claim 2 is characterized in that, the upper end of described valve body is provided with screen pack.
4. the downhole packer based on shape-memory material as claimed in claim 1, it is characterized in that, described overcurrent sliding sleeve is connected on the described fixed end spacing ring by cutting off pin, described overcurrent sliding sleeve has flowing hole, be formed with the overcurrent chamber between described overcurrent sliding sleeve and the described body, described overcurrent chamber is connected with described inlet opening, cut off that pin is cut off and axial lower the shifting out under the state of described fixed end spacing ring of the flowing hole of described overcurrent sliding sleeve described, described inlet opening is connected with described feed pathway by the flowing hole of described overcurrent sliding sleeve.
5. the downhole packer based on shape-memory material as claimed in claim 1 is characterized in that, is provided with the opening baffle ring between described body and described floating end spacing ring, and described opening baffle ring is made by shape memory alloy material.
6. the downhole packer based on shape-memory material as claimed in claim 1 is characterized in that, the lower surface of described transition joint is provided with a plurality of dentation connecting portions, and described a plurality of dentation connecting portions are embedded in described packing element.
7. the downhole packer based on shape-memory material as claimed in claim 1 is characterized in that, the upper surface of described floating end spacing ring is provided with a plurality of dentation connecting portions, and described a plurality of dentation connecting portions are embedded in described packing element.
8. the downhole packer based on shape-memory material as claimed in claim 1, it is characterized in that, between described fixed end spacing ring and the described body, between described overcurrent sliding sleeve and the described body, between described floating end spacing ring and the described body and be respectively equipped with a plurality of sealing rings between described overcurrent sliding sleeve and the described fixed end spacing ring.
9. the downhole packer based on shape-memory material as claimed in claim 2 is characterized in that, is being respectively equipped with a plurality of sealing rings between described valve body and the described body and between described valve body and the described transition joint.
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| CN 201320120290 CN203239273U (en) | 2013-03-15 | 2013-03-15 | Down-hole packer based on shape memory materials |
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| CN 201320120290 CN203239273U (en) | 2013-03-15 | 2013-03-15 | Down-hole packer based on shape memory materials |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206186A (en) * | 2013-03-15 | 2013-07-17 | 中国石油天然气股份有限公司 | Down-hole packer based on shape memory materials |
| CN104929561A (en) * | 2014-03-18 | 2015-09-23 | 中国石油化工股份有限公司 | Packer |
| CN114575779A (en) * | 2020-11-30 | 2022-06-03 | 中国石油天然气股份有限公司 | Casing cementing sliding sleeve |
-
2013
- 2013-03-15 CN CN 201320120290 patent/CN203239273U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206186A (en) * | 2013-03-15 | 2013-07-17 | 中国石油天然气股份有限公司 | Down-hole packer based on shape memory materials |
| CN104929561A (en) * | 2014-03-18 | 2015-09-23 | 中国石油化工股份有限公司 | Packer |
| CN104929561B (en) * | 2014-03-18 | 2017-07-07 | 中国石油化工股份有限公司 | Packer |
| CN114575779A (en) * | 2020-11-30 | 2022-06-03 | 中国石油天然气股份有限公司 | Casing cementing sliding sleeve |
| CN114575779B (en) * | 2020-11-30 | 2023-09-26 | 中国石油天然气股份有限公司 | Casing well cementation sliding sleeve |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 |