CN206987777U - A kind of solvable bridging plug - Google Patents
A kind of solvable bridging plug Download PDFInfo
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- CN206987777U CN206987777U CN201720910497.XU CN201720910497U CN206987777U CN 206987777 U CN206987777 U CN 206987777U CN 201720910497 U CN201720910497 U CN 201720910497U CN 206987777 U CN206987777 U CN 206987777U
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- bridging plug
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- pipe nipple
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Abstract
The utility model provides a kind of solvable bridging plug, it is related to downhole tool technical field, for temporary plugging oil gas pit shaft, it is described to be made up including mandrel, the packing element, the centrum sleeve, the slips and the lower contact pipe nipple of soluble material including mandrel, packing element, centrum sleeve, slips and lower contact pipe nipple；The anti-premature setting mechanism contacted with the termination of the other end of the mandrel is provided with one end inner surface of the lower contact pipe nipple.When setting, after the completion of pressing crack construction, recover with temperature in pit shaft, reached the condition of all parts dissolving in bridging plug, solvable bridging plug contacts generation dissolving reaction with the liquid in Oil/gas Well, is finally completely dissolved, realizes that oil gas wellbore tubular internal diameter is unobstructed；By setting anti-premature setting mechanism, even if maloperation, the pulling force on lower contact pipe nipple is less than the setting power of anti-premature setting mechanism, and will not also start bridging plug sets function；Improve the reliability of bridging plug.
Description
Technical field
It the utility model is related to a kind of downhole tool used in well fracturing segmentation transformation temporary plug casing inner diameter
Technical field, particularly a kind of solvable bridging plug.
Background technology
In Oil/gas Well staged fracturing transforms operation, it will usually use the work of composite bridge plug or cast iron bridging plug as segmentation
Tool.Both bridging plugs are each advantageous, and such as composite bridge plug, it, which has to bore, grinds fireballing feature, after fracturing work terminates, is
Higher oil and gas production is obtained, these composite bridge plugs can be ground off by coiled tubing quick drill, forms the well of full-bore, but
It is that brill mill operating cost is high, with the increase for boring mill depth, brill tribulation degree, relevant risk also increase, in the segmentation of some deep-wells
In fracturing reform, boring mill depth can be limited by coiled tubing length, so that can not use compound bridge in some deep-wells
Plug.
The cast iron bridging plug being used in staged fracturing transformation operation is usually big orifice bridging plug, is the characteristics of this bridging plug
Interior latus rectum is big, can be after the completion of pressure break, and directly the row of returning is gone into operation, while big orifice cast iron bridging plug is ground without boring, and eliminates brill mill
Relevant cost and risk.With the increase of Oil/gas Well productive life, the oil and gas production of Oil/gas Well also declines therewith, and the two of Oil/gas Well
The secondary important way for being transformed into increase oil gas well production, however, using the pit shaft of cast iron big orifice bridging plug staged fracturing, meeting exists
The internal diameter of undergauge, i.e. cast iron big orifice bridging plug is formed in pit shaft, limitation so is formed to the construction method of secondary transformation, to secondary
The effect of transformation impacts.
To sum up, although composite bridge plug can form the pit shaft of full-bore after mill is bored, it bores mill expense and risk is high；
Although cast iron big orifice bridging plug need not bore mill and can directly go into operation, it makes pit shaft undergauge, and the secondary transformation to Oil/gas Well causes
Limitation.
Utility model content
The utility model provides a kind of solvable bridging plug, needs to bore mill or shadow in actual use to solve above-mentioned existing bridging plug
Ring the technical problem of secondary transformation.
In order to solve the above-mentioned technical problem, the utility model provides a kind of solvable bridging plug, is set for oil gas pit shaft, including
Mandrel, packing element, centrum sleeve, slips and lower contact pipe nipple, the mandrel are hollow structure, and one end of the mandrel is provided with spacing
Boss, the packing element and the centrum sleeve are slidably located in the mandrel outer surface successively, and the small end of the centrum sleeve is remote
From the side of the packing element, one end of the packing element contacts with the positive stop lug boss；The slips is multiple, multiple slips
It is located at by radial direction position limiting structure on the conical surface of the centrum sleeve, one end of the lower contact pipe nipple is slidably located in the core
The other end of axle is simultaneously abutted with the slips, and the other end of the lower contact pipe nipple is connected with setting tool adapter, the bag
Mandrel, the packing element, the centrum sleeve, the slips and the lower contact pipe nipple is included to be made up of soluble material；Connect under described
The anti-premature setting mechanism contacted with the termination of the other end of the mandrel is provided with one end inner surface of head pipe nipple.
The beneficial effects of the utility model are：Due to described including mandrel, the packing element, the centrum sleeve, the card
Watt and the lower contact pipe nipple be soluble material, during setting, by one end of setting tool adapter and lower contact pipe nipple
The other end be fixedly connected, whole bridging plug is placed into oil gas pit shaft, then controls setting for solvable bridging plug；When pressure break is applied
After the completion of work, recover with temperature in pit shaft, reached the condition of all parts dissolving in bridging plug, in solvable bridging plug and Oil/gas Well
Liquid contact occur dissolving reaction, be finally completely dissolved, realize that oil gas wellbore tubular internal diameter is unobstructed；It is real that mill can need not be bored
The all-pass of existing pit shaft, while will not also cause pit shaft undergauge.In actual use, bridging plug is not placed into oil gas pit shaft also and set
Positioning is when putting, and operating personnel or equipment misoperation setting tool adapter, it is short that setting tool adapter will pull lower contact
Section, sets to start；By setting anti-premature setting mechanism, even if maloperation, the pulling force on lower contact pipe nipple is less than anti-carry
The setting power of preceding setting mechanism, will not also start bridging plug sets function；Improve the reliability of bridging plug.
Further, the anti-premature setting mechanism is the projective structure being arranged on the inner surface of the lower contact pipe nipple,
The projective structure is structure as a whole with the lower contact pipe nipple.
It is using the above-mentioned further beneficial effect of scheme：Directly by setting the anti-premature setting mechanism of projective structure,
Structure is reliable；Meanwhile boss is structure as a whole with the lower contact pipe nipple, is easy to the processing of product.
Further, it is provided with the spiral shell being connected with setting tool adapter on the other end inner surface of the lower contact pipe nipple
Line.
It is using the above-mentioned further beneficial effect of scheme：Lower contact pipe nipple is connected by screw thread and setting tool adapter
Connect, quantity, the tooth pitch of screw thread of screw thread can be adjusted, the specification of thread fits setting tool to realize by different pulling force
Orchestration comes off from lower contact pipe nipple；It is easy to set the spiral shell of different size in different use conditions and subsurface environment according to bridging plug
Line, the effect of the setting tool adapter shearing force different from lower contact pipe nipple is reached.
Further, being provided between the inner surface of the centrum sleeve and the mandrel prevents the centrum sleeve to described
The single direction locking mechanism of the other end of mandrel slidably.
It is using the above-mentioned further beneficial effect of scheme：During bridging plug is set, extruded and blocked by lower contact pipe nipple
Watt, centrum sleeve is then extruded by slips, and then make one end crimp of the packing element to mandrel so that packing element outer surface and well
Tube inner surface crush seal；By setting single direction locking mechanism, centrum sleeve would not be slided to the other end of mandrel, improved
Reliability of the bridging plug during setting.
Further, annular groove, the single direction locking mechanism bag are provided with the circumference of the inner surface of the centrum sleeve
Clamping block is included, the clamping block is engaged with the mandrel by unidirectional limiting tooth, and the clamping block is located in the annular groove
And can radially moving in annular groove.
It is using the above-mentioned further beneficial effect of scheme：Clamping block in single direction locking mechanism can be in the footpath of annular groove
Move up, during setting, unidirectional limiting tooth will not be worn, avoid influenceing the clamping block pass through with the mandrel it is unidirectional
Limiting tooth engages limit effect.
Further, it is provided with the diversion groove passed through for well liquid on the end face of the other end of the lower contact pipe nipple.
It is using the above-mentioned further beneficial effect of scheme：In product in actual use, multiple bridging plugs are had together
Use, one end of the mandrel in bridging plug can seal mandrel internal diameter by ball sealer, when the ball sealer of the solvable bridging plug in bottom returns row
When to the solvable bridging plug setting position, ball sealer can contact with lower contact pipe nipple bottom, but not seal diversion groove, no
The internal diameter of solvable bridging plug mandrel can be blocked.
Further, slips gap, the length direction in the slips gap and the axle of the mandrel are provided with the slips
Line is parallel, and the slips gap extends from the appearance of the slips towards its inside.
It is using the above-mentioned further beneficial effect of scheme：During the setting of bridging plug, slips is extruded by both ends
The outside dilatancy of meeting, by setting slips gap, helps the grappling on the internal diameter of pit shaft with slips.
Further, set the restricted slips on the shaft in wall to the mandrel on the outer surface of the slips
The other end slide the unidirectional anchoring structure of slips.
It is using the above-mentioned further beneficial effect of scheme：By setting the unidirectional anchoring structure of slips, it is ensured that slips is more
It is firmly anchored on shaft in wall, improves bridging plug and set the efficiency of construction and the reliability set.
Further, multiple slips are distributed in the outer surface circumference of the mandrel.
It is using the above-mentioned further beneficial effect of scheme：Multiple slips are distributed in the outer surface circumference of mandrel, make anchor
Determine that power is more balanced in shaft in wall, improve the stability of slips and shaft in wall grappling.
Further, one end termination of the mandrel is arranged to concave shape.
It is using the above-mentioned further beneficial effect of scheme：One end termination of mandrel is used to be tightly connected with ball sealer, its
Concave shape structure be easy to the good contact of ball sealer and sealing, realize the effect of the reliable and stable one-way bearing pressure of bridging plug.
Brief description of the drawings
Fig. 1 is the sectional structure chart of the solvable bridging plug embodiment of the utility model,
Fig. 2 is the local structural graph of A in Fig. 1,
Fig. 3 is the local structural graph of B in Fig. 1,
Fig. 4 is the local structural graph of C in Fig. 1,
Fig. 5 is solvable bridging plug entirety outer side view.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, slips, 2, centrum sleeve, 3, mandrel, 4, lower contact pipe nipple, 5, diversion groove, 6, packing element, 7, monodirectional locking machine
Structure, 8, anti-premature setting mechanism
Embodiment
The utility model is further described with embodiment below in conjunction with the accompanying drawings.
The sectional structure chart of the solvable bridging plug embodiment of the utility model is referring to Fig. 1, a kind of solvable bridging plug, for oil gas pit shaft
Set, including mandrel 3, packing element 6, centrum sleeve 2, slips 1 and lower contact pipe nipple 4, mandrel 3 is hollow structure, one end of mandrel 3
Provided with positive stop lug boss, packing element 6 and centrum sleeve 2 are slidably located in the outer surface of mandrel 3 successively, and the small end of centrum sleeve 2 is away from institute
The side of packing element 6 is stated, one end of packing element 6 contacts with positive stop lug boss；Slips 1 is multiple, and multiple slips 1 pass through radial direction position limiting structure
On the conical surface of centrum sleeve 2, one end of lower contact pipe nipple 4 be slidably located in mandrel 3 the other end and abutted with slips 1,
The other end of lower contact pipe nipple 4 is connected with setting tool adapter, including mandrel 3, packing element 6, centrum sleeve 2, slips 1 and under connect
Head pipe nipple 4 is made up of soluble material；It is provided with one end inner surface of lower contact pipe nipple 4 and is connect with the termination of the other end of mandrel 3
Tactile anti-premature setting mechanism 8.
Due to being 30 DEG C to 200 DEG C in temperature including mandrel 3, packing element 6, centrum sleeve 2, slips 1 and lower contact pipe nipple 4
Under be dissolved in the soluble material of the aqueous solution, during setting, by the another of one end of setting tool adapter and lower contact pipe nipple 4
End is fixedly connected, whole bridging plug is placed into oil gas pit shaft, then controls setting for solvable bridging plug；When pressing crack construction is completed
Afterwards, recover with temperature in pit shaft, reached the condition of all parts dissolving in bridging plug, solvable bridging plug and the liquid in Oil/gas Well
Dissolving reaction occurs for contact, is finally completely dissolved, realizes that oil gas wellbore tubular internal diameter is unobstructed；Mill can need not be bored and realize pit shaft
Full-bore, while will not also cause pit shaft undergauge.In actual use, bridging plug is not placed into oil gas pit shaft also and sets position
When putting, operating personnel or equipment misoperation setting tool adapter, setting tool adapter will pull lower contact pipe nipple 4,
Set to start；By setting anti-premature setting mechanism 8, even if maloperation, the pulling force on lower contact pipe nipple 4 is less than anti-shift to an earlier date
In the setting of setting mechanism 8, will not also start bridging plug sets function；Improve the reliability of bridging plug.
In the present embodiment, anti-premature setting mechanism 8 is the projective structure being arranged on the inner surface of lower contact pipe nipple 4,
Projective structure is structure as a whole with lower contact pipe nipple 4.
Directly by setting the anti-premature setting mechanism 8 of projective structure, structure is reliable；Meanwhile boss and lower contact
Pipe nipple 4 is structure as a whole, and is easy to the processing of product.
In a particular embodiment, anti-premature setting mechanism 8 can be arranged to different according to particular condition in use and environment
The size of shape and shear force, such as annular boss structure, or multiple boss structures are located at the week of the inner surface of lower contact pipe nipple 4
Upwards.
In the present embodiment, it is provided with what is be connected with setting tool adapter on the other end inner surface of lower contact pipe nipple 4
Screw thread.
Lower contact pipe nipple 4 is connected by screw thread with setting tool adapter, can adjust quantity, the tooth of screw thread of screw thread
Away from the specification of thread makes setting tool adapter be come off from lower contact pipe nipple 4 to realize by different pulling force；It is easy to root
The screw thread of different size is set according to bridging plug in different use conditions and subsurface environment, has reached setting tool adapter and has been connect with
The effect of the different shearing force of head pipe nipple 4.
In the present embodiment, being provided between the inner surface of centrum sleeve 2 and mandrel 3 prevents centrum sleeve 2 to mandrel 3
The single direction locking mechanism 7 of the other end slidably.
During bridging plug is set, slips is extruded by lower contact pipe nipple 4, centrum sleeve 2 is then extruded by slips, entered
And make one end crimp of the packing element 6 to mandrel 3 so that the outer surface of packing element 6 and pit shaft inner surface crush seal；It is single by setting
To locking mechanism 7, centrum sleeve 2 would not slide to the other end of mandrel 3, and it is reliable during setting to improve bridging plug
Property.
In the present embodiment, annular groove is provided with the circumference of the inner surface of centrum sleeve 2, single direction locking mechanism 7 wraps
Clamping block is included, clamping block is engaged with mandrel 3 by unidirectional limiting tooth, and clamping block is located in annular groove and can be in annular groove
Radially move.
Clamping block in single direction locking mechanism 7 can radially moving in annular groove, during setting, will not wear
Unidirectional limiting tooth, avoiding influences clamping block engages limit effect with mandrel 3 by unidirectional limiting tooth.
In the present embodiment, the diversion groove passed through for well liquid is provided with the end face of the other end of lower contact pipe nipple 4
5。
In product in actual use, have multiple bridging plugs to be used together, one end of the mandrel 3 in bridging plug can be by close
Blocking seals the internal diameter of mandrel 3, when the ball sealer of the solvable bridging plug in bottom, which returns, is discharged to the solvable bridging plug setting position when, sealing
Club contacts with lower contact pipe nipple bottom, but not seals diversion groove 5, will not block the internal diameter of solvable bridging plug mandrel.
In the present embodiment, slips gap is provided with slips 1, the axis of the length direction and mandrel 3 in slips gap is put down
OK, slips gap extends from the appearance of slips 1 towards its inside.
During the setting of bridging plug, slips by both ends extruding can outside dilatancy, by setting slips gap,
Help the grappling on the internal diameter of pit shaft with slips.
In the present embodiment, set restricted slips 1 on shaft in wall to the another of mandrel 3 on the outer surface of slips 1
Hold the unidirectional anchoring structure of slips slided.
By setting the unidirectional anchoring structure of slips, it is ensured that slips is tively firm anchored on shaft in wall, improves bridge
Plug sets the efficiency of construction and the reliability set.
In the present embodiment, multiple slips 1 are distributed in the outer surface circumference of mandrel 3.
Multiple slips are distributed in the outer surface circumference of mandrel 3, are made anchorage force more balanced in shaft in wall, are improved card
Stability watt with shaft in wall grappling.
In the present embodiment, one end termination of mandrel 3 is arranged to concave shape.
One end termination of mandrel 3 is used to be tightly connected with ball sealer, and its concave shape structure is easy to connect with the good of ball sealer
Touch and seal, realize the effect of the reliable and stable one-way bearing pressure of bridging plug.
When being set using solvable bridging plug, one end of the pull bar in setting tool adapter is another with lower contact pipe nipple 4
End is fixedly connected, and setting tool adapter sleeve abuts with the positive stop lug boss of mandrel 3, and during setting, setting tool applies
External force makes pull bar be moved towards with sleeve, and such lower contact pipe nipple 4 just drives slips 1 and centrum sleeve 2 to extrude packing element 6,
So that packing element 6 deforms, its outer surface is just in close contact with the inwall of oil gas pit shaft；When further applying external force, pull bar
Pulling force be more than lower contact pipe nipple 4 by pull bar attachment force in screw thread and setting tool adapter, pull bar is just and lower contact pipe nipple 4
Shearing comes off；At this moment, the inwall of packing element 6 and oil gas pit shaft is fully sealed, and slips 1 and the complete grappling of oil gas shaft in wall.When
After solvable bridging plug is set, setting tool is reclaimed, in the solvable pressure break ball of well head input correspondingly-sized.In the solvable pressure break of straight well section
Ball can be fallen on the ball seat at the top of solvable bridging plug mandrel 3 under gravity, can by injecting liquid-driving in net horizontal section
Molten pressure break ball is fallen on the ball seat at the solvable top of bridging plug mandrel 3.After pressure break ball is fallen on ball seat, pressure break pump truck is continued through
Infusion fracturing liquid applies pressure to ball can realize the sealing of ball and ball seat, and these fracturing liquids can be entered by preforation tunnel
Stratum, start fracturing stratum, be all pumped into stratum when designing total amount of liquid, then complete pressing crack construction.
Example is applied specific, slips 1, centrum sleeve 2, mandrel 3, lower contact pipe nipple 4, single direction locking mechanism 7, anti-is sat in advance
Sealing mechanism 8 is made for magnesium alloy；Packing element 6 typically uses solvable elastomeric material.Magnesium alloy is using aluminium alloy as matrix material
The element such as material, addition Mg, Sn, C, Zn, soluble material is prepared using electrochemical principle, and rare earth member is added in aluminum alloy materials
Element, destroy aluminum alloy materials and form dense oxidation film so that aluminum alloy materials No oxided film is protected, so that metal material reaches
It is solvable, the speed of Process on Aluminum Alloy Oxidation Film is destroyed by controlling the content of thulium to control, is finally reached control metal material
The rate of dissolution of material.The temperature of down-hole liquid is generally 30 DEG C to 200 DEG C, and in the liquid environment of the underground aqueous solution, magnalium closes
With chlorion electrochemical reaction occurs for gold, realizes dissolving.Can sol rubber and the underground aqueous solution high-temp liquid Long Term Contact after,
Lose intensity, disintegrate, be finally dissolved into pureed.
A local structural graph is provided with annular groove referring to Fig. 2 in the circumference of the inner surface of centrum sleeve 2 in Fig. 1, single
Include clamping block to locking mechanism 7, clamping block is engaged with mandrel 3 by unidirectional limiting tooth, and clamping block can be in the footpath of annular groove
Move up.Wherein, the clamping block in single direction locking mechanism 7 can be two semicircular structure parts, when 2 glue of centrum sleeve
During the movement extruding of 6 directions of cylinder, clamping block radially moves normal movement just as annular groove, mutual due to unidirectional limiting tooth
Engagement, clamping block just block spacing on direction to the right is illustrated, and will not move right, such centrum sleeve 2 also will not be to the right
It is mobile, centrum sleeve 2 and the positive stop lug boss of mandrel 3 is remained enough extruding forces to packing element 6, particularly set completion
Afterwards, packing element 6 will not influence its sealing property because of the dismounting of setting tool, substantially increase the reliability of solvable bridging plug.
In a particular embodiment, different quantity and structure can be set to improve lock in the clamping block in single direction locking mechanism 7
Fixed reliability；Meanwhile the intermeshing depth of unidirectional limiting tooth can be set to reach different more locking effects.
B local structural graph is referring to Fig. 3 in Fig. 1, is provided with the other end inner surface of lower contact pipe nipple 4 and setting tool
The screw thread of adapter connection.In actual use, different screw thread nominal diameters is set, the specification of different ridges,
Different screw thread quantity reaches different shearing forces.
Lower contact pipe nipple 4 is connected by screw thread with setting tool adapter, can adjust quantity, the tooth of screw thread of screw thread
Away from the specification of thread makes setting tool adapter be come off from lower contact pipe nipple 4 to realize by different pulling force；It is easy to root
The screw thread of different size is set according to bridging plug in different use conditions and subsurface environment, has reached setting tool adapter and has been connect with
The effect of the different shearing force of head pipe nipple 4.
C local structural graph sets restricted slips 1 on shaft in wall referring to Fig. 4 on the outer surface of slips 1 in Fig. 1
The unidirectional anchoring structure of slips slided to the other end of mandrel 3；The unidirectional anchoring structure of slips is unidirectional toothing, when slips 1 exists
When being moved to the left in direction as shown, unidirectional toothing can in direction as shown to the right with shaft in wall grappling so that slips can not
Enough move right；Improve bridging plug and set the efficiency of construction and the reliability set.
Solvable bridging plug entirety outer side view in the example shown, is provided with slips gap referring to Fig. 5 on slips 1, slips gap
The diameter parallel of length direction and mandrel 3, slips gap extend from the appearance of slips 1 towards its inside.Block in the present embodiment
Watt 1 quantity is 8.
During the setting of bridging plug, slips by both ends extruding can outside dilatancy, by setting slips gap,
Help the grappling on the internal diameter of pit shaft with slips.
In description of the present utility model, it is to be understood that term " " center ", " length ", " width ", " on ", " under ",
The orientation or position relationship of the instruction such as " vertical ", " level ", " top ", " bottom ", " interior " are based on orientation shown in the drawings or position
Relation, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Be joined directly together, can also be indirectly connected by intermediary, can be two element internals connection or two elements it is mutual
Interactively.For the ordinary skill in the art, it can understand that above-mentioned term is new in this practicality as the case may be
Concrete meaning in type.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it
" under " can directly be contacted including the first and second features, it is not directly to contact but lead to that can also include the first and second features
The other characterisation contact crossed between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the
One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.First is special
Sign second feature " under ", " lower section " and " below " including fisrt feature immediately below second feature and obliquely downward, or only
Represent that fisrt feature level height is less than second feature.
Solvable bridging plug of the present utility model is described in detail above, specific case used herein is to this practicality
New principle and embodiment is set forth.The explanation of above example is only intended to help and understands core of the present utility model
Thought is thought；Meanwhile for those of ordinary skill in the art, according to thought of the present utility model, in embodiment and answer
With there will be changes in scope, to sum up, this specification content should not be construed as to limitation of the present utility model.
Claims (10)
- A kind of 1. solvable bridging plug, for temporary plugging oil gas pit shaft, including mandrel (3), packing element (6), centrum sleeve (2), slips (1) and lower contact pipe nipple (4), the mandrel (3) are hollow structure, and one end of the mandrel (3) is provided with positive stop lug boss, the glue Cylinder (6) and the centrum sleeve (2) are slidably located in the mandrel (3) outer surface successively, and the small end of the centrum sleeve (2) is remote One end from packing element (6) described in the side of the packing element (6) contacts with the positive stop lug boss；The slips (1) is multiple to be multiple The slips (1) is located at by radial direction position limiting structure on the conical surface of the centrum sleeve (2), and the one of the lower contact pipe nipple (4) Hold the other end for the mandrel (3) that is slidably located in and abutted with the slips (1), the other end of the lower contact pipe nipple (4) Be connected with setting tool adapter, it is characterised in that it is described including mandrel (3), the packing element (6), the centrum sleeve (2), The slips (1) and the lower contact pipe nipple (4) are made up of soluble material；On one end inner surface of the lower contact pipe nipple (4) It is provided with the anti-premature setting mechanism (8) contacted with the termination of the other end of the mandrel (3).
- 2. solvable bridging plug according to claim 1, it is characterised in that the anti-premature setting mechanism (8) is is arranged on The projective structure on the inner surface of lower contact pipe nipple (4) is stated, the projective structure is integrated knot with the lower contact pipe nipple (4) Structure.
- 3. solvable bridging plug according to claim 1, it is characterised in that the other end inner surface of the lower contact pipe nipple (4) On be provided with the screw thread being connected with setting tool adapter.
- 4. the solvable bridging plug according to any one of claims 1 to 3, it is characterised in that the inner surface of the centrum sleeve (2) Being provided between the mandrel (3) prevents the other end slidably unidirectional of the centrum sleeve (2) to the mandrel (3) Locking mechanism (7).
- 5. solvable bridging plug according to claim 4, it is characterised in that in the circumference of the inner surface of the centrum sleeve (2) Annular groove is provided with, the single direction locking mechanism (7) includes clamping block, and the clamping block is with the mandrel (3) by unidirectional Limiting tooth engages, and the clamping block is located in the annular groove and can radially moving in annular groove.
- 6. the solvable bridging plug according to any one of claims 1 to 3, it is characterised in that the lower contact pipe nipple (4) it is another The diversion groove (5) passed through for well liquid is provided with the end face at end.
- 7. the solvable bridging plug according to any one of claims 1 to 3, it is characterised in that be provided with slips on the slips (1) Gap, the length direction in the slips gap and the diameter parallel of the mandrel (3), the slips gap is from the slips (1) Appearance internal extend towards it.
- 8. the solvable bridging plug according to any one of claims 1 to 3, it is characterised in that set on the outer surface of the slips (1) It is equipped with and limits the unidirectional grappling knot of slips that the slips (1) is slided on the shaft in wall to the other end of the mandrel (3) Structure.
- 9. the solvable bridging plug according to any one of claims 1 to 3, it is characterised in that multiple slips (1) are distributed on institute In the outer surface circumference for stating mandrel (3).
- 10. the solvable bridging plug according to any one of claims 1 to 3, it is characterised in that one end termination of the mandrel (3) It is arranged to concave shape.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720910497.XU CN206987777U (en) | 2017-07-26 | 2017-07-26 | A kind of solvable bridging plug |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720910497.XU CN206987777U (en) | 2017-07-26 | 2017-07-26 | A kind of solvable bridging plug |
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| CN206987777U true CN206987777U (en) | 2018-02-09 |
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Cited By (11)
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|---|---|---|---|---|
| CN109025898A (en) * | 2018-10-11 | 2018-12-18 | 天津市玛特瑞科技有限公司 | A kind of solvable bridge plug |
| CN109236229A (en) * | 2018-10-09 | 2019-01-18 | 成都维泰油气能源技术有限公司 | A kind of mixing bridge plug |
| CN109505559A (en) * | 2018-11-29 | 2019-03-22 | 成都铭鉴知源油田工程科技有限公司 | A kind of solvable bridge plug |
| CN110005369A (en) * | 2019-05-24 | 2019-07-12 | 广东立升行智能科技应用有限公司 | A kind of solvable bridge plug of metal sealing |
| CN110259413A (en) * | 2019-07-03 | 2019-09-20 | 中国石油天然气集团有限公司 | A kind of solvable bridge plug of integral type and preparation method thereof |
| CN111364939A (en) * | 2019-12-19 | 2020-07-03 | 大庆油田有限责任公司 | Double-conical-surface sealing module for downhole tool |
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| CN110259413A (en) * | 2019-07-03 | 2019-09-20 | 中国石油天然气集团有限公司 | A kind of solvable bridge plug of integral type and preparation method thereof |
| CN111364939A (en) * | 2019-12-19 | 2020-07-03 | 大庆油田有限责任公司 | Double-conical-surface sealing module for downhole tool |
| CN113944440A (en) * | 2020-07-15 | 2022-01-18 | 四川维泰科创石油设备制造有限公司 | Section hoop and clamping seat |
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| CN112727377A (en) * | 2021-01-08 | 2021-04-30 | 西安交通大学 | Sandstone heat storage three-throw geothermal well body structure and construction method |
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