CN109083616A - A kind of solvable bridge plug - Google Patents
A kind of solvable bridge plug Download PDFInfo
- Publication number
- CN109083616A CN109083616A CN201811302360.1A CN201811302360A CN109083616A CN 109083616 A CN109083616 A CN 109083616A CN 201811302360 A CN201811302360 A CN 201811302360A CN 109083616 A CN109083616 A CN 109083616A
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- China
- Prior art keywords
- slips
- mandrel
- bridge plug
- wedge
- sphenoid
- Prior art date
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- 238000012856 packing Methods 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 241000239290 Araneae Species 0.000 claims description 26
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 15
- 241000237509 Patinopecten sp. Species 0.000 claims description 7
- 235000020637 scallop Nutrition 0.000 claims description 7
- 238000005336 cracking Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 33
- 238000000034 method Methods 0.000 description 11
- 230000000007 visual effect Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000009335 monocropping Methods 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The application provides a kind of solvable bridge plug, including mandrel, one end of the mandrel is provided with limiting section, crossover sub is slidably fitted in the other end of the mandrel, packing element and sphenoid are successively set between the limiting section and crossover sub, it is arranged with the first slips band and the second slips band respectively at the both ends of the sphenoid, the crossover sub along the direction where mandrel to limiting section for moving, so that the first slips band and the second slips band move radial dilatation and Expansion And Fracture along sphenoid, the packing element, which is compressed axially, to be radially expanded to realize sealing.The application is by being slidably mounted on mandrel far from limiting section one end for crossover sub, so that crossover sub moves in setting operation along the direction where mandrel to limiting section, so that mandrel in setting operation and subsequent fracturing work only by unidirectional pressure, greatly ensure that the reliability of mandrel.
Description
Technical field
This application involves oil-gas field development technical field, in particular to a kind of solvable bridge plug.
Background technique
Bridge plug be can be divided into for blocking the conventional tool of wellbore by post-processing mode in oil field development can bore bridge plug and
Retrieval bridge plug, the application of horizontal well stage fracturing technology in recent years, fractured interval of individual well is more, and the dosage of bridge plug is very big, general
The brill mill of logical bridge plug is salvaged treatment process and is all unable to satisfy from time efficiency and economic benefit.With horizontal well multilayer multistage pressure
The technique requirement split, has expedited the emergence of compound fast-turn construction bridge plug and the solvable bridge plug of the solvable bridge plug of metal, especially metal is completed after constructing not
Need to do any post-processing, and junk is not stayed in underground, be used for perforating and fracturing continuous cropping technique achieve economic effect well and
Social benefit.But solvable bridge plug structure used at present and the difference of original cast iron bridge plug are less, and solvable bridge plug structure does not have
Breakthrough sexually revises, and performance test is also not sufficiently stable, can not scale application, do not form achievement.
Summary of the invention
The defect for aiming to overcome that the prior art of the application provides a kind of reliable and stable, easy for construction, pressure-bearing index
Higher solvable bridge plug.
To achieve the above object, the application adopts the technical scheme that
A kind of solvable bridge plug, including mandrel 1 are provided with limiting section 101 in one end of the mandrel 1, in the mandrel 1
The other end is slidably fitted with crossover sub 13, is successively set with packing element 3 and wedge between the limiting section 101 and crossover sub 13
Body 9 is arranged with the first slips band 81 and the second slips band 82, the first slips band at the both ends of the sphenoid 9 respectively
81 include multiple the first slips 851 being arranged around mandrel 1, is existed between first slips 851 by the limit of slips lantern ring 83
On the sphenoid 9, the second slips band 82 includes multiple the second slips 852 being arranged around mandrel 1, second slips
Between 852 through the limit of slips lantern ring 83 on the sphenoid 9, the crossover sub 13 is used for along mandrel 1 to limiting section 101
The direction at place moves so that the first slips band 81 and the second slips band 82 moved along sphenoid 9 it is respectively that slips lantern ring 83 is swollen
Disconnected, first slips 851 and 852 radial dilatation of the second slips are locking by solvable bridge plug, and the packing element 3 is compressed axially radial swollen
It is swollen to realizing sealing.
It optionally, further include expansion loop 5, tapered sleeve 6 and slip spider 12, the expansion loop 5 is stacked with tapered sleeve 6 in packing element
3 and first between slips band 81, the slip spider 12 be arranged between the second slips band 82 and crossover sub 13 and with the second card
Watt band 82 is abutted against with slip spider 12.
Optionally, the sphenoid 9 includes first wedge-shaped part 91, the second wedge-shaped part 92 and changeover portion 93, the first wedge
The two sides that shape portion 91 and the second wedge-shaped part 92 are separately positioned on changeover portion 93 form both-end sphenoid structure, in first wedge-shaped part 91
With on the second wedge-shaped part 92 distinguish the multiple wedge grooves 94 of radial equipartition, pacify respectively on each wedge groove 94 of first wedge-shaped part 91
Equipped with first slips 851, second slips 852 is separately installed on each wedge groove 94 of the second wedge-shaped part 92.
Optionally, first slips 851 is arc-shaped, is equipped with inner arc surface 853 in the side of first slips 851
With inclined-plane 854, the inclined-plane 854 is matched with the wedge groove 94, is equipped with external arc in the other side of first slips 851
Face 855 is set on the exterior arc surface 855 there are two arc groove 856 and multiple first block teeth 84, described two arc grooves 856
The both ends of the first slips 851 are located at, the multiple first block teeth 84 are radially arranged along the side wall of the first slips 851, more
The institute on the sphenoid 9 is limited by the slips lantern ring 83 being mounted in two arc grooves 856 between a first slips 851
The structure for stating the second slips 852 is identical as the structure of the first slips 851.
Optionally, the expansion loop 5 is cirque structure, and coniform inner cone is equipped on the inner wall of the expansion loop 5
Face 51 is evenly distributed with multiple fan grooves 52 on the inner conical surface 51, and sets respectively between each fan groove 52
There is a cracking slot 53.
Optionally, the tapered sleeve 6 is truncated cone-shaped structure, and coniform male cone (strobilus masculinus) 61 is equipped on the side wall of the tapered sleeve 6,
The male cone (strobilus masculinus) 61 is protruded into the inner wall of the expansion loop 5 and is matched with the inner conical surface 51, and in the male cone (strobilus masculinus) 61
It goes up and is evenly distributed with multiple dovetail grooves 62.
Optionally, the cross section of the mandrel 1 is T-shaped, including spindle body 103, and the protrusion of limiting section 101 is set
It sets on the side wall of described 103 one end of spindle body, the other end of the spindle body 103 forms multiple fan-shaped knots along mandrel 1
The fan-shaped pawl 105 of structure is provided with centre bore 102 along axially penetrating through for the spindle body 103, and the centre bore 102 is close to limit
The end of 101 one end of position portion is equipped with the sealing surface 104 of bell mouth shape, and the end of 13 one end of the crossover sub is located at center
In hole 102.
Optionally, the crossover sub 13 includes the pedestal 131 and interconnecting piece 132 that are connected, the interconnecting piece 132 it is straight
It is T-shaped to stand upside down that the diameter that diameter is less than pedestal 131 makes the cross section of the crossover sub 13, and the interconnecting piece 132 is located at
It is matched in centre bore 102 and with the inner wall of the centre bore 102, and is equipped with threaded hole 133 in interconnecting piece 132,
The middle part of the pedestal 131 is equipped with the central through hole 134 being connected with the threaded hole 133, in the outer of the central through hole 134
Side is uniformly surrounded with multiple scallop holes 135 matched with the fan-shaped pawl 105.
Optionally, helmet 2 is separately installed at the both ends of the packing element 3, the helmet 2 is bowl structure and by packing element 3
Both ends cladding.
Optionally, the slip spider 12 be cirque structure, the both ends of the slip spider 12 respectively with the second slips band 82
The second slips 852 and crossover sub 13 abut against, retaining ring 11 is provided between the slip spider 12 and mandrel 1, it is described
The internal diameter and outer diameter of retaining ring 11 respectively with 1 clearance fit of slip spider 12 and mandrel.
Optionally, tooth button 111 and opening 112 are equipped in retaining ring 11, the tooth button 111 is distributed in the interior of retaining ring 11
It is arranged on wall and outer wall and in equidirectional Unequal distance, the opening 112 is cut along bus so that retaining ring 11 has by retaining ring 11
Standby circumferential elasticity.
It optionally, further include the first safety pin 71, the second safety pin 72 and third safety pin 73, first safety pin 71
Be arranged in tapered sleeve 6 and with 1 interference engagement of mandrel, second safety pin 72 is arranged in sphenoid 9 and matches with the interference of mandrel 1
Close, the third safety pin 73 be arranged in slip spider 12 and with 1 interference engagement of mandrel.
The solvable bridge plug of the application is by being slidably mounted on mandrel far from limiting section one end, so that conversion connects for crossover sub
Head moves in setting operation along the direction where mandrel to limiting section, so that mandrel is setting operation and subsequent pressure break
Only by unidirectional pressure in operation, the reliability of mandrel greatly ensure that, and not having in fracturing work central axis
The process for having opposite packing element to move down avoids mandrel and damages to the scratch of packing element and to the vibration of slips band.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the solvable bridge plug of the embodiment of the present application；
Fig. 2 is the structural schematic diagram of the mandrel of the embodiment of the present application；
Fig. 3 is the structural schematic diagram at another visual angle of mandrel of the embodiment of the present application；
Fig. 4 is the structural schematic diagram of the crossover sub of the embodiment of the present application；
Fig. 5 is the structural schematic diagram at another visual angle of crossover sub of the embodiment of the present application；
Fig. 6 is the structural schematic diagram of the fixed pin of the embodiment of the present application；
Fig. 7 is the structural schematic diagram of the packing element of the embodiment of the present application；
Fig. 8 is the structural schematic diagram of the helmet of the embodiment of the present application；
Fig. 9 is the structural schematic diagram of the expansion loop of the embodiment of the present application；
Figure 10 is the structural schematic diagram at another visual angle of expansion loop of the embodiment of the present application；
Figure 11 is the structural schematic diagram of the plain cushion of the embodiment of the present application；
Figure 12 is the structural schematic diagram of the tapered sleeve of the embodiment of the present application；
Figure 13 is the structural schematic diagram at another visual angle of tapered sleeve of the embodiment of the present application；
Figure 14 is the structural schematic diagram of the sphenoid of the embodiment of the present application；
Figure 15 is the structural schematic diagram at another visual angle of sphenoid of the embodiment of the present application
Figure 16 is the structural schematic diagram at another visual angle of sphenoid of the embodiment of the present application；
Figure 17 is the structural schematic diagram of first slips of the embodiment of the present application；
Figure 18 is the structural schematic diagram at another visual angle of the first slips of the embodiment of the present application；
Figure 19 is the structural schematic diagram at another visual angle of the first slips of the embodiment of the present application；
Figure 20 is the structural schematic diagram of the slips lantern ring of the embodiment of the present application；
Figure 21 is the structural schematic diagram of second slips of the embodiment of the present application；
Figure 22 is the structural schematic diagram of the slips seat ring of the embodiment of the present application；
Figure 23 is the structural schematic diagram of the first slips band of the embodiment of the present application；
Figure 24 is the structural schematic diagram of the second slips band of the embodiment of the present application；
Figure 25 is the structural schematic diagram of the slip spider of the embodiment of the present application；
Figure 26 is the structural schematic diagram of the retaining ring of the embodiment of the present application；
Figure 27 is the structural schematic diagram of the tooth button of the embodiment of the present application；
Figure 28 is the structural schematic diagram of the safety pin of the embodiment of the present application；
Figure 29 is the course of work schematic diagram of the solvable bridge plug of the embodiment of the present application；
Figure 30 is the course of work schematic diagram of the solvable bridge plug of the embodiment of the present application；
Figure 31 is the course of work schematic diagram of the solvable bridge plug of the embodiment of the present application；
Figure 32 is the course of work schematic diagram of the solvable bridge plug of the embodiment of the present application；
Figure 33 is the course of work schematic diagram of the solvable bridge plug of the embodiment of the present application.
Appended drawing reference
1- mandrel, 101- limiting section, 102- centre bore, 103- spindle body, 104- sealing surface, 105- sector pawl, 2- shield
Cap, 3- packing element, 4- plain cushion, 5- expansion loop, 51- inner conical surface, 52- fan groove, 53- cracking slot, 6- tapered sleeve, 61- male cone (strobilus masculinus), 62-
Dovetail groove, the first safety pin of 71-, the second safety pin of 72-, 73- third safety pin, 81- the first slips band, 82- the second slips band,
83- slips lantern ring, the first block teeth of 84-, the first slips of 851-, the second slips of 852-, 853- inner arc surface, the inclined-plane 854-, 855-
Exterior arc surface, 856- arc groove, 857- notch, 9- sphenoid, 91- first wedge-shaped part, the second wedge-shaped part of 92-, 93- changeover portion,
94- wedge groove, 10- slips seat ring, 11- retaining ring, 111- tooth button, 112- opening, 12- slip spider, 13- crossover sub, 131-
Pedestal, 132- interconnecting piece, 133- threaded hole, 134- central through hole, 135- scallop hole, 14- fixed pin, 15- casing, 16- are solvable
Ball sealer, the second block teeth of 17-.
Specific embodiment
The specific embodiment of the application is described with reference to the accompanying drawing.
Herein, "upper", "lower", "front", "rear", "left", "right" etc. are only used for indicating opposite between relevant portion
Positional relationship, and the absolute position of these non-limiting relevant portions.
Herein, " first ", " second " etc. are only used for mutual differentiation, rather than indicate significance level and sequence and
Existing premise etc. each other.
Herein, the limitation in " equal ", " identical " etc. and non-critical mathematics and/or geometry meaning also includes
It will be appreciated by those skilled in the art that and the error that the permissions such as makes or uses.
Unless otherwise indicated, numberical range herein not only includes the entire scope in two endpoint, also includes containing
In several subranges therein.
This application discloses a kind of solvable bridge plugs, as shown in Figure 1, including mandrel 1, are provided in one end of the mandrel 1
Limiting section 101 is slidably fitted with crossover sub 13 in the other end of the mandrel 1, in the limiting section 101 and crossover sub 13
Between be successively set with packing element 3 and sphenoid 9, be arranged with the first slips band 81 and second respectively at the both ends of the sphenoid 9
Slips band 82, the first slips band 81 includes multiple the first slips 851 being arranged around mandrel 1, first slips 851
Between by slips lantern ring 83 limit on the sphenoid 9, the second slips band 82 include it is multiple around mandrel 1 be arranged
Second slips 852, between second slips 852 through the limit of slips lantern ring 83 on the sphenoid 9, the crossover sub
13 along the direction where mandrel 1 to limiting section 101 for moving, so that the first slips band 81 and the second slips band 82 are along sphenoid
9 movements are swollen disconnected by slips lantern ring 83 respectively, and first slips 851 and 852 radial dilatation of the second slips are locking by solvable bridge plug,
The packing element 3, which is compressed axially, to be radially expanded to realize sealing.
The application is by being slidably mounted on mandrel 1 far from 101 one end of limiting section, so that crossover sub 13 for crossover sub 13
It is moved along mandrel 1 to the direction where limiting section 101 in setting operation, so that mandrel 1 is setting operation and subsequent
Only by unidirectional pressure in fracturing work, avoids prior art central axis 1 and pressed when setting operation by pulling force
The case where splitting in operation by pressure, greatly ensure that the reliability of mandrel 1, and make in fracturing work central axis 1 without phase
To the process that packing element 3 moves down, avoid mandrel 1 and damaged to the scratch of packing element 3 and to the vibration of slips band, meanwhile, pass through by
Packing element 3 and two slips bands are separately positioned on the both ends of mandrel 1, so that the opposite hollow section that mandrel 1 occurs after setting is located at
At the position of two slips bands of 3 lower end of packing element, so as to avoid in fracturing work pressure act directly on the opposite of mandrel 1
Hollow section improves the stress of mandrel 1, so that stress danger section of the mandrel 1 in pressure break high pressure disappears.
As shown in Figures 2 and 3, one embodiment provided by the present application, the cross section of the mandrel 1 are T-shaped, including
Spindle body 103, the limiting section 101 are provided projectingly on the side wall of described 103 one end of spindle body, the spindle body
103 other end forms the fan-shaped pawl 105 of multiple sector structures along mandrel 1, axially penetrates through setting along the spindle body 103
There is centre bore 102, the centre bore 102 is equipped with the sealing surface 104 of bell mouth shape close to the end of 101 one end of limiting section, and
The end of described 13 one end of crossover sub is located in centre bore 102.
As shown in Figures 4 to 6, one embodiment provided by the present application, the crossover sub 13 include the pedestal being connected
131 and interconnecting piece 132, the diameter that the diameter of the interconnecting piece 132 is less than pedestal 131 makes the cross section of the crossover sub 13
T-shaped to stand upside down, the interconnecting piece 132 is located in centre bore 102 and matches with the inner wall of the centre bore 102, and
The threaded hole 133 being equipped with for being connected with delivery setting tool in interconnecting piece 132, sets at the middle part of the pedestal 131
Have the central through hole 134 being connected with the threaded hole 133, the central through hole 134 wrap around be provided with it is uniformly more
A scallop hole 135 matched with the fan-shaped pawl 105, enables crossover sub 13 to slide with respect to mandrel 1.
Optionally, the quantity of the fan-shaped pawl 105 can be four, and corresponding on the pedestal of crossover sub 13 131
If each scallop hole 135 is matched with a fan-shaped pawl 105 respectively there are four scallop hole 135.
Optionally, one group of second cylindrical block teeth 17 is equipped on the side wall of the pedestal 131 for preventing conversion from connecing
First 13 abrasion, second block teeth 17 can be high-strength ceramic column.
Optionally, distribution is provided with multiple fixed pins 14 on the side wall of the pedestal 131.
As shown in Figure 7 and Figure 8, one embodiment provided by the present application is separately installed with helmet at the both ends of the packing element 3
2, the helmet 2 is bowl structure and is used for the both ends of packing element 3 cladding to protect packing element 3.
As shown in Figure 1, one embodiment provided by the present application, the solvable bridge plug of the application further includes expansion loop 5, tapered sleeve 6
With slip spider 12, the expansion loop 5 and tapered sleeve 6 are stacked between packing element 3 and the first slips band 81, and the slip spider 12 is set
It sets between the second slips band 82 and crossover sub 13 and is abutted against with the second slips band 82 with slip spider 12.
As shown in Figures 9 to 11, one embodiment provided by the present application is set between the expansion loop 5 and packing element 3
Plain cushion 4 for playing a protective role；The expansion loop 5 is cirque structure, and circular cone is equipped on the inner wall of the expansion loop 5
The inner conical surface 51 of shape, is evenly distributed with multiple fan grooves 52 on the inner conical surface 51, and each fan groove 52 it
Between be respectively equipped with a cracking slot 53；
As shown in Figure 12 to Figure 13, one embodiment provided by the present application, the tapered sleeve 6 is truncated cone-shaped structure, described
The side wall of tapered sleeve 6 is equipped with coniform male cone (strobilus masculinus) 61, the male cone (strobilus masculinus) 61 protrude into the inner wall of the expansion loop 5 and with it is described
Inner conical surface 51 matches, and on the male cone (strobilus masculinus) 61 and is evenly distributed with multiple dovetail grooves 62.
Optionally, fan groove 52 there are four being uniformly distributed on the inner conical surface 51, uniformly divides on the male cone (strobilus masculinus) 61
There are four dovetail grooves 62 for cloth.
As shown in Figure 14 to Figure 16, one embodiment provided by the present application, the sphenoid 9 include first wedge-shaped part 91,
Second wedge-shaped part 92 and changeover portion 93, the first wedge-shaped part 91 and the second wedge-shaped part 92 are separately positioned on the two sides of changeover portion 93
Both-end sphenoid structure is formed, the multiple wedge grooves 94 of radial equipartition are distinguished in first wedge-shaped part 91 and the second wedge-shaped part 92,
First slips 851 is separately installed on each wedge groove 94 of first wedge-shaped part 91 so as to form the first slips band 81,
Second slips 852 is separately installed on each wedge groove 94 of the second wedge-shaped part 92 so as to form the second slips band
82；
As shown in Figure 17 to Figure 20, one embodiment provided by the present application, first slips 851 is arc-shaped, in institute
The side for stating the first slips 851 is equipped with inner arc surface 853 and inclined-plane 854, and the inclined-plane 854 is matched with the wedge groove 94,
It is equipped with exterior arc surface 855 in the other side of first slips 851, is set on the exterior arc surface 855 there are two arc groove 856
With multiple first block teeth 84, described two arc grooves 856 are located at the both ends of the exterior arc surface 855, and the multiple first
Block teeth 84 are radially arranged along exterior arc surface 855, by being mounted in two arc grooves 856 between multiple first slips 851
Slips lantern ring 83 limits on the sphenoid 9.
Optionally, first block teeth 84 can be high-strength ceramic column.
Optionally, the angle of the axis of the inclined-plane 854 and the first slips 851 is not more than 20 °.
The structure of second slips 852 is identical as the structure of the first slips 851, and details are not described herein.
Optionally, as shown in figure 21 and figure, on each side wall of second slips 852 far from 854 one end of inclined-plane
Equipped with one for accommodating the notch 857 of slips seat ring 10, the internal diameter of the slips seat ring 10 is sleeved in mandrel 1, the card
The outer diameter of watt seat ring 10 is matched with each second slips 852.
As shown in figs. 23 and 24, one embodiment provided by the present application, the first slips band 81 include four first cards
Watts 851, the second slips band 82 includes eight the second slips 852, and on first slips 851 and the second slips 852
First block teeth 84 to inlay angle all identical, since the first slips band 81 is for helping out, therefore the first slips
Number with 81 the first slips 851 is relatively fewer, and the second slips band 82 is used to bear the pressure of large force, therefore second
The number of second slips 852 of slips band 82 is relatively more.
As shown in Figure 1, Figure 25 to shown in Figure 27, and one embodiment provided by the present application, the slip spider 12 is cirque structure,
The both ends of the slip spider 12 are abutted against with the second slips 852 and crossover sub 13 of the second slips band 82 respectively, in the card
Watt be provided with retaining ring 11 between seat 12 and mandrel 1, the internal diameter and outer diameter of the retaining ring 11 respectively with slip spider 12 and mandrel 1
Clearance fit, and tooth button 111 and opening 112 are equipped in retaining ring 11, the tooth button 111 is distributed in the inner wall of retaining ring 11
It is arranged on outer wall and in equidirectional Unequal distance, the opening 112 is cut along bus so that retaining ring 11 has by retaining ring 11
Circumferential elasticity.
As shown in Fig. 1 and Figure 28, one embodiment provided by the present application, the solvable bridge plug of the application further includes the first safety
Pin 71, the second safety pin 72 and third safety pin 73, first safety pin 71 are arranged in tapered sleeve 6 and match with the interference of mandrel 1
Close, second safety pin 72 be arranged in sphenoid 9 and with 1 interference engagement of mandrel, the third safety pin 73 is arranged in card
In watt seat 12 and with 1 interference engagement of mandrel.
The assembling process of the solvable bridge plug of the application is, successively in the lower section of limiting section 101 suit helmet 2, packing element 3, flat
Pad 4, expansion loop 5, tapered sleeve 6 and sphenoid 9, after the axial position for adjusting each part, each wedge at 9 both ends of sphenoid
Corresponding first slips 851 or the second slips 852 are respectively packed into shape slot 94, in each first slips 851 and the second card
Enough fire resistant anaerobic adhesives are painted into watts 852 two arc grooves 856, are inserted in after the saw kerf of the slips lantern ring 83 swells
In the arc groove 856 of first slips 851 and the second slips 852 and slips lantern ring 83 is made to restore to the original state, guarantee slips lantern ring 83 with
The arc groove 856 of each first slips 851 or the second slips 852 is bonded securely, then installs slips seat ring 10 and slip spider 12,
Retaining ring 11 is screwed in slip spider 12 and limited with third safety pin 73 by the opening 112 of retaining ring 11, and by slip spider
12 and 11 integral assembling of retaining ring in mandrel 1 and hold the second slips 852, the interconnecting piece 132 of the crossover sub 13 is right
Scallop hole 135 on the pedestal 131 of crossover sub 13 is directed at the fan-shaped pawl 105 of mandrel 1 and inserted by the centre bore 102 of quasi- mandrel 1
Enter, fixed pin 14 is installed and is fixed with anaerobic adhesive, the first safety pin 71, the second safety pin 72 and third safety pin 73 are finally installed
And fixed with anaerobic adhesive and make being limited to axial with radial motion between each part, to complete entire solvable bridge plug
Assembly.
The course of work of the solvable bridge plug of the application, which is divided into, sets operation and fracturing work:
For the process for setting operation as shown in Figure 29 to Figure 31, the mandrel 1 and crossover sub 13 pass through spindle body
103 and centre bore 102 and deliver setting tool (cable deliver or hydraulic dropping feeder, individually use available hydraulic dropping feeder, as point
Section pressure break etc. is with multiple bridge plugs then with cable dropping feeder) it is connected, it goes into the well and is shipped to design position, it is accurately fixed by positioning device
Position forms pull-up crossover sub 13 under the action of external force (fuel combustion generates or hydraulic generation) and pushes the one of mandrel 1
To contrary active force equal in magnitude, which makes crossover sub 13 with respect to 1 uplink of mandrel, by fixed pin 14, the
One safety pin 71, the second safety pin 72 and third safety pin 73 are cut, and crossover sub 13 continues uplink with respect to 1 uplink of mandrel, are pushed away
Dynamic first slips band 81 and the second slips band 82 are drawn close along respective 854 radial dilatation of inclined-plane and axially, the first slips band
81 and the whole opposite mandrel 1 of the second slips band 82 move upwards, watt lantern ring 83 is broken during uplink is drawn close, crossover sub 13
Opposite 1 uplink of mandrel continues uplink, and the first slips 851 and the second slips 852 continue to draw close expansion along respective inclined-plane 854, the
The first block teeth 84 occlusion on one slips 851 and the second slips 852, which is embedded in the inner wall of construction casing 15, completes locking work
With；Meanwhile tapered sleeve 6 is also pushed to exercise expansion loop 5 and radially crack according to the divisural line set and is divided into equal portions and along tapered sleeve 6
Side wall radial dilatation, expansion loop 5 is in contact to playing rigid protective to the lower end of packing element 3 with the inner wall of casing 15 after expanding
Effect, and in setting operation, the axially compressed radial dilatation of the packing element 3 is to seal the outer diameter and casing 15 of mandrel 1
The annular space formed between internal diameter, when the active force is more than 13 preset pull-off force of crossover sub, the solvable bridge of the application
Plug is detached from realization with the setting tool and gives up, and completes to set, it is to be dissolved that the crossover sub 13 falls into pit shaft etc..
The process of the fracturing work is as shown in Figure 32 and Figure 33, risen after completing perforation take out underground tool string (including
Bridge plug delivery tool, perforation is robbed and its measurement and positioning tool), putting into solvable ball sealer 16 makes the solvable ball sealer 16 and center
The sealing surface 104 in hole 102 abuts against to seal 102 one-way sealing of centre bore to entire construction well shaft, subsequent
Carry out fracturing work.During fracturing work carries out, the solvable bridge plug seal shaft of the application protects the lower layer of pit shaft and pressure break
The upper layer of pit shaft, entire solvable bridge plug bear downward pressure, and the pressure is by the first block teeth 84 of the first slips 851 and the second card
Insertion frictional force undertakes between watts 852 the first block teeth 84 and casing 15, while the pressure can make the mandrel 1 of solvable bridge plug living
Plug compresses packing element 3, that is, the pressure conversion that will act in mandrel 1 sets power, the more high secondary seat of the pressure of pressure break at secondary
Envelope power is bigger, and the locking ability of insertion friction between the first slips 851 and the second slips 852 and casing 15 is stronger,
Ensure that solvable bridge plug bearing capacity and locking ability so that the retaining ring 11 is without being subjected to any power in fracturing work
Effect, avoid retaining ring 11 and destroyed due to excessive by pressure.
The application changes the position of retaining ring 11 in the prior art, by the way that slips band is arranged in the retaining ring 11
Lower section, so that basic change occurs for the effect of retaining ring 11, the retaining ring 11 is subjected only to dropping feeder connection after completing to set
The frictional force of the mandrel 1 of bar and solvable bridge plug, in fracturing work, retaining ring 11 loses any effect, will not be excessive because of stress
And it destroys.
The processing of pit shaft after pressure break within the set time may be used after the solvable bridge plug of the application completes full well section pressure break
With completely it is water-soluble, do not stay any junk, only need well-flushing is anti-dissolved matter is discharged.
The solvable bridge plug of the application is suitable for the multistage fracturing operation of multilayer multistage, especially suitable for fractured horizontal well perforation
Complete well continuous cropping technique is completed after constructing, and bores mill processing without salvaging, solving existing solvable bridge plug, there are retaining rings when pressure break to slide
De- bridge plug failure and 1 setting fracture stress of mandrel are different to cause its piston type folding process to cause solvable bridge plug failure, Yi Ji
When pressure break high pressure the problem of the compression overload of the dangerous section of mandrel 1 of 3 top of packing element of solvable bridge plug, solvable bridge plug pressure-bearing is improved
Index improves the reliability and success rate of solvable bridge plug.
The application preferred embodiment and embodiment are explained in detail above in conjunction with attached drawing, but the application
It is not limited to the above embodiment and embodiment can also not take off within the knowledge of those skilled in the art
It is made a variety of changes under the premise of from the application design.
Claims (12)
1. a kind of solvable bridge plug, which is characterized in that including mandrel (1), one end of the mandrel (1) is provided with limiting section
(101), crossover sub (13) are slidably fitted in the other end of the mandrel (1), in the limiting section (101) and crossover sub
(13) it is successively set with packing element (3) and sphenoid (9) between, is arranged with the first slips respectively at the both ends of the sphenoid (9)
Band (81) and the second slips band (82), the first slips band (81) include multiple the first slips around mandrel (1) setting
(851), second slips on the sphenoid (9) is limited by slips lantern ring (83) between first slips (851)
Band (82) includes multiple the second slips (852) around mandrel (1) setting, passes through slip sleeve between second slips (852)
Ring (83) limits on the sphenoid (9), and the crossover sub (13) is used for where mandrel (1) to limiting section (101)
Direction movement, so that the first slips band (81) and the second slips band (82) are moved along sphenoid (9) respectively by slips lantern ring (83)
Swollen disconnected, first slips (851) and the second slips (852) radial dilatation are locking by solvable bridge plug, and the packing element (3) is axially pressed
Contracting is radially expanded to realize sealing.
2. solvable bridge plug according to claim 1, which is characterized in that further include expansion loop (5), tapered sleeve (6) and slip spider
(12), the expansion loop (5) and tapered sleeve (6) are stacked between packing element (3) and the first slips band (81), the slip spider
(12) it is arranged between the second slips band (82) and crossover sub (13) and offsets with the second slips band (82) with slip spider (12)
It connects.
3. solvable bridge plug according to claim 1 or 2, which is characterized in that the sphenoid (9) includes first wedge-shaped part
(91), the second wedge-shaped part (92) and changeover portion (93), the first wedge-shaped part (91) and the second wedge-shaped part (92) are separately positioned on
The two sides of changeover portion (93) form both-end sphenoid structure, radial respectively in first wedge-shaped part (91) and the second wedge-shaped part (92)
Uniformly distributed multiple wedge grooves (94), are separately installed with first slips on each wedge groove (94) of first wedge-shaped part (91)
(851), second slips (852) is separately installed on each wedge groove (94) of the second wedge-shaped part (92).
4. solvable bridge plug according to claim 3, which is characterized in that first slips (851) is arc-shaped, described
The side of first slips (851) is equipped with inner arc surface (853) and inclined-plane (854), the inclined-plane (854) and the wedge groove (94)
It matches, is equipped with exterior arc surface (855) in the other side of first slips (851), is equipped on the exterior arc surface (855)
Two arc grooves (856) and multiple first block teeth (84), described two arc grooves (856) are located at the first slips (851)
Both ends, the multiple first block teeth (84) are radially arranged along the side wall of the first slips (851), multiple first slips (851) it
Between limited on the sphenoid (9) by the slips lantern ring (83) that is mounted in two arc grooves (856)；
The structure of second slips (852) is identical as the structure of the first slips (851).
5. solvable bridge plug according to claim 2, which is characterized in that the expansion loop (5) is cirque structure, described
The inner wall of expansion loop (5) is equipped with coniform inner conical surface (51), is evenly distributed with multiple sectors on the inner conical surface (51)
Slot (52), and a cracking slot (53) is respectively equipped between each fan groove (52).
6. solvable bridge plug according to claim 5, which is characterized in that the tapered sleeve (6) is truncated cone-shaped structure, in the cone
The side wall for covering (6) is equipped with coniform male cone (strobilus masculinus) (61), and the male cone (strobilus masculinus) (61) is protruded into the inner wall of the expansion loop (5) simultaneously
It is matched with the inner conical surface (51), and on the male cone (strobilus masculinus) (61) and is evenly distributed with multiple dovetail grooves (62).
7. solvable bridge plug according to claim 1, which is characterized in that the cross section of the mandrel (1) is T-shaped, packet
It includes spindle body (103), the limiting section (101) is provided projectingly on the side wall of the spindle body (103) one end, the heart
The other end of shaft body (103) forms the fan-shaped pawl (105) of multiple sector structures along mandrel (1), along the spindle body (103)
Axially penetrate through and be provided with centre bore (102), the centre bore (102) is equipped with loudspeaker close to the end of limiting section (101) one end
The sealing surface (104) of mouth shape, and the end of the crossover sub (13) one end is located in centre bore (102).
8. solvable bridge plug according to claim 7, which is characterized in that the crossover sub (13) includes the pedestal being connected
(131) and changeover portion (132), the diameter that the diameter of the changeover portion (132) is less than pedestal (131) make the crossover sub
(13) cross section be stand upside down it is T-shaped, the changeover portion (132) be located at centre bore (102) it is interior and with the centre bore (102)
Inner wall match, and on changeover portion (132) be equipped with threaded hole (133), the middle part of the pedestal (131) be equipped with and institute
State the central through hole (134) that threaded hole (133) is connected, the central through hole (134) wrap around be uniformly arranged it is more
A scallop hole (135) matched with the fan-shaped pawl (105).
9. solvable bridge plug according to claim 1, which is characterized in that be separately installed with shield at the both ends of the packing element (3)
Cap (2), the helmet (2) are bowl structure and coat the both ends of packing element (3).
10. solvable bridge plug according to claim 2, which is characterized in that the slip spider (12) is cirque structure, described
The both ends of slip spider (12) are abutted against with the second slips (852) of the second slips band (82) and crossover sub (13) respectively, in institute
State and be provided between slip spider (12) and mandrel (1) retaining ring (11), the internal diameter and outer diameter of the retaining ring (11) respectively with card
Watt seat (12) and mandrel (1) clearance fit.
11. solvable bridge plug according to claim 10, which is characterized in that on retaining ring (11) be equipped with tooth button (111) and
It is open (112), the tooth button (111) is distributed on the inner and outer wall of retaining ring (11) and is arranged in equidirectional Unequal distance, institute
It states opening (112) and is cut along bus so that retaining ring (11) has circumferential elasticity by retaining ring (11).
12. solvable bridge plug according to claim 2, which is characterized in that further include the first safety pin (71), the second safety pin
(72) and third safety pin (73), the first safety pin (71) setting in tapered sleeve (6) and with mandrel (1) interference engagement, institute
The second safety pin (72) setting is stated in the sphenoid (9) and with mandrel (1) interference engagement, third safety pin (73) setting exists
In slip spider (12) and with mandrel (1) interference engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811302360.1A CN109083616B (en) | 2018-11-02 | 2018-11-02 | Soluble bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811302360.1A CN109083616B (en) | 2018-11-02 | 2018-11-02 | Soluble bridge plug |
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| Publication Number | Publication Date |
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| CN109083616A true CN109083616A (en) | 2018-12-25 |
| CN109083616B CN109083616B (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811302360.1A Active CN109083616B (en) | 2018-11-02 | 2018-11-02 | Soluble bridge plug |
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| CN110513075A (en) * | 2019-08-16 | 2019-11-29 | 中国石油集团长城钻探工程有限公司 | A kind of solvable bridge plug and accelerate bridge plug dissolution can dissolving device |
| CN112761606A (en) * | 2021-01-26 | 2021-05-07 | 西安费诺油气技术有限公司 | FDC all-metal soluble fracturing nipple |
| CN113090227A (en) * | 2020-01-09 | 2021-07-09 | 中国石油天然气股份有限公司 | Multilayer quick-dissolving fracturing string |
| CN113107413A (en) * | 2020-01-09 | 2021-07-13 | 中国石油天然气股份有限公司 | Split type all-metal sealing device |
| CN113216899A (en) * | 2021-06-07 | 2021-08-06 | 大庆市晟威机械制造有限公司 | High-pressure-resistant soluble bridge plug |
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| CN113107413A (en) * | 2020-01-09 | 2021-07-13 | 中国石油天然气股份有限公司 | Split type all-metal sealing device |
| CN113107413B (en) * | 2020-01-09 | 2022-06-03 | 中国石油天然气股份有限公司 | Split type all-metal sealing device |
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| CN112761606A (en) * | 2021-01-26 | 2021-05-07 | 西安费诺油气技术有限公司 | FDC all-metal soluble fracturing nipple |
| CN113216899A (en) * | 2021-06-07 | 2021-08-06 | 大庆市晟威机械制造有限公司 | High-pressure-resistant soluble bridge plug |
| CN113216899B (en) * | 2021-06-07 | 2021-11-16 | 大庆市晟威机械制造有限公司 | High-pressure-resistant soluble bridge plug |
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| CN109083616B (en) | 2024-01-12 |
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