CN110242243A - A kind of separate type pressure-bearing blanking plug and its application method for down-hole string - Google Patents
A kind of separate type pressure-bearing blanking plug and its application method for down-hole string Download PDFInfo
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- CN110242243A CN110242243A CN201910491268.2A CN201910491268A CN110242243A CN 110242243 A CN110242243 A CN 110242243A CN 201910491268 A CN201910491268 A CN 201910491268A CN 110242243 A CN110242243 A CN 110242243A
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- blanking plug
- plug
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 83
- 238000012856 packing Methods 0.000 claims abstract description 76
- 238000006073 displacement reaction Methods 0.000 claims description 69
- 229920001971 elastomer Polymers 0.000 claims description 35
- 239000005060 rubber Substances 0.000 claims description 35
- 239000007787 solid Substances 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 23
- 239000000956 alloy Substances 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 31
- 230000000694 effects Effects 0.000 abstract description 18
- 230000004888 barrier function Effects 0.000 abstract description 8
- 230000002441 reversible effect Effects 0.000 abstract description 8
- 238000005065 mining Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 12
- 230000002708 enhancing effect Effects 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 5
- 239000013618 particulate matter Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction 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
- E21B33/12—Packers; Plugs
-
- 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
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
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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)
- Details Of Valves (AREA)
Abstract
The invention discloses a kind of separate type pressure-bearing blanking plugs and its application method for down-hole string, belong to oil-gas mining technical field, a kind of separate type pressure-bearing blanking plug and its application method for down-hole string, including down-hole string ontology, down-hole string body interior is equipped with pressure-bearing blanking plug, top upper prop chock is equipped on the upside of pressure-bearing blanking plug, pressure-bearing blanking plug upper end, which is dug, hydroslatic joint slot, it may be implemented to improve to inside pressure-bearing blanking plug, separate spool filter disc can under formation fluid impact with fixed pivot piece, while realization sets effect, reversed barrier formation fluid enters blanking plug, mitigate formation fluid during fluid channel internal flow, damage to the spool filter disc of blanking plug, the service life of lifting blockage device, to the pressure of spool filter disc when passing through formation fluid reverse flow simultaneously, reduce particle Object obstructs between spool and mandrel, so that blanking plug be made to continue to keep packing effect.
Description
Technical field
The present invention relates to oil-gas mining technical fields, hold more specifically to a kind of separate type for down-hole string
Press blanking plug and its application method.
Background technique
Oil gas drilling special equipment is primarily present damage class and aging pine in the failure problems that winning apparatus occurs
Four kinds of failures of performance failure caused by de- class failure and imbalance class and blocking leakage, the erosion of splitting in terms of performance is respectively part are asked
The problems such as inscribing and pull deformation and cracking and impression, and the rotten aging in terms of aging class problem is mainly reflected in material and abrasion
Secondly phenomena such as peeling is the failure for loosening aspect, then be mainly reflected in the loosening etc. that falls off in terms of components.
In the drilling process that oil gas carries out before drilling, Technology of Directional Drilling is generally used, realizes " Quito hole, a hole
More, a Kong Duoyong " reduces board quantity and resettlement.Using Technology of Directional Drilling, multiple drillings can be carried out in a base station
Or the drilling of multiple branched holes is carried out in a hole, to reduce the quantity of base station, constructing road and goods and materials relocating work, it is
The effective technology means that green is reconnoitred are realized in medium-length hole drilling.The multinomial achievements such as the continuous whipstock of the machinery succeeded in developing are expert at
It is applied in industry.In nearly 2 years implementation " plateau eco-environment vulnerable areas comprehensive drilling technology Applied D emonstration " projects, use
There is cable with brill/screw motor directional technology, the drilling of 2 branched holes is respectively completed in 1 drilling and across the three of exploration line
Dimension orientation, drilling results are significant.
Many oil fields generally use pitching into blanking plug during completion practice at present, to be sealed by hydraulic setting
Every device, can have with safeguards containment device higher set success rate in this way.But existing technique come with some shortcomings place, such as to
The buffer brake that the ball put into blanking plug cannot bear formation fluid application in this way can be right especially in high-pressure oil-gas well
There are security risk, Chinese invention publication numbers when top operation (such as opening sliding sleeve, replacement annular protective liquid etc.) is operated
" a kind of down-hole string pressure-bearing blanking plug " is disclosed for CN106988704A, comprising: ontology has first end, the second end
And it is formed in the fluid channel between the first end and the second end；Mandrel is arranged in the fluid channel；Sealing
Valve is arranged in the fluid channel with the mandrel connect, can insulate the fluid channel.Downhole tubular according to the present invention
Column pressure-bearing blanking plug comprising intrinsic mandrel is arranged in and with the close of sealing function in the ontology that is connected with oil pipe
Seal valve.The down-hole string pressure-bearing blanking plug for being connected with the embodiment of the present invention is being transferred in well and after pitching, blanking plug is not only
It can complete packer setting work and be capable of the sealing valve in packer fluids channel due to having, to also have reverse pressure-bearing
Effect, avoid formation fluid from entering blanking plug, guarantee the safety of work progress, improve construction efficiency, reduce construction cost.
Above-mentioned technical proposal can not only complete packer setting work and be capable of packer fluids channel due to having
Sealing valve avoids formation fluid from entering blanking plug to also have the function of reverse pressure-bearing, guarantees the safety of work progress,
But due to play the role of packing mainly by the spool inside sealing valve, spool moves under the promotion of internal transport materials
It is dynamic, from blanking plug lower end to it is mobile close to mandrel one end when, spool easily collides with mandrel lower end, with using the time
Increase, deformation occurs easily under pressure and collision for spool top edge and mandrel joint, to make spool upper end can not be to mandrel
It is insulated completely, the packing effect failure of blanking plug is in turn resulted in, simultaneously because the head of spool is hemispherical, to mandrel
When being insulated, when spool and mandrel joint, spool is kept completely separate the barrier of partial particulate object with mandrel, is equally easily caused stifled
The failure for filling in device function, can not obstruct formation fluid and enter inside blanking plug.
Summary of the invention
1. technical problems to be solved
Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a kind of separate types for down-hole string
Pressure-bearing blanking plug and its application method, it may be implemented to improve to inside pressure-bearing blanking plug, make spool filter disc and branch solid point
Stator can be separated under formation fluid impact, and while realization sets effect, the reversed formation fluid that obstructs enters blanking plug,
Mitigate formation fluid during fluid channel internal flow, the damage to the spool filter disc of blanking plug, lifting blockage device makes
Particulate matter barrier is reduced in spool and mandrel to the pressure of spool filter disc with the service life, while when passing through formation fluid reverse flow
Between, so that blanking plug be made to continue to keep packing effect.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of separate type pressure-bearing blanking plug and its application method for down-hole string, including down-hole string ontology, it is described
Down-hole string body interior is equipped with pressure-bearing blanking plug, and top upper prop chock, the pressure-bearing blocking are equipped on the upside of the pressure-bearing blanking plug
Device upper end, which is dug, hydroslatic joint slot, and the pressure-bearing blanking plug is matched by hydroslatic joint slot and top upper prop chock lower end, institute
It states pressure-bearing blanking plug lower end and is fixedly connected with outer edge packing snap ring, the outer edge packing snap ring outer end and down-hole string ontology
Inner wall fits closely, and interior pressure-bearing is equipped with inside the outer edge packing snap ring and insulates snap ring, the interior pressure-bearing insulates snap ring or more
Both ends are bonded with outer edge packing snap ring inner segment are fixedly connected respectively, are equipped with fluid conduit systems on the inside of the interior pressure-bearing packing snap ring,
The fluid conduit systems upper end is fixedly connected with driven displacement plunger ring, and the driven displacement plunger ring upper end is connected with displacement packing
Plug, the pressure-bearing blanking plug centre, which is dug, fluid channel, and the fluid in the displacement wiper plug upper end and pressure-bearing blanking plug is logical
Road matches, and may be implemented to improve to inside pressure-bearing blanking plug, makes spool filter disc and fixed pivot piece can be in formation fluid
It is separated under impact, while realization sets effect, the reversed formation fluid that obstructs enters blanking plug, mitigates formation fluid and is flowing
In body channel interior flow process, damage to the spool filter disc of blanking plug, the service life of lifting blockage device, while passing through ground
To the pressure of spool filter disc when layer fluid reverse flow, particulate matter barrier is reduced between spool and mandrel, to make blanking plug
It is lasting to keep packing effect.
Further, the displacement wiper plug upper end is fixedly connected with clamping protrusion, is socketed in the upper clamping protrusion
There is single leaf point to turn excluder ring, the list leaf point turns excluder ring upper end and is bonded with pressure-bearing blanking plug close to displacement wiper plug one end, and
Dan Yefen turns excluder ring lower end and is slidably connected with displacement wiper plug upper end, passes through the upper clamping protrusion added on displacement wiper plug
Turn excluder ring with single leaf point, convenient for enhancing displacement wiper plug to the barriering effect of pressure-bearing blanking plug fluid channel.
Further, it is equipped with pressure-bearing deformation ring between the interior pressure-bearing packing snap ring and outer edge packing snap ring, it is described to hold
Swaging becomes ring upper end and is bonded with interior pressure-bearing packing snap ring inner wall, and the outer edge packing snap ring upper end and pressure-bearing deformation ring inner end are solid
Fixed connection, the pressure-bearing deformation ring lower end are fixedly connected with outer edge packing snap ring lower end, by interior pressure-bearing insulate snap ring with
The pressure-bearing deformation ring added between outer edge packing snap ring, convenient for insulating shape between snap ring and interior pressure-bearing packing snap ring in outer edge
At gap, reduce the gouging abrasion of outer edge packing snap ring and interior pressure-bearing packing snap ring after subtle flow under external pressure.
Further, interior pressure-bearing packing snap ring lower end is fixedly connected with round bearing plate, under the circle bearing plate
End is interference fitted with pressure-bearing deformation ring inner wall, by insulating the round bearing plate that snap ring lower end is added in interior pressure-bearing, within making
Pressure-bearing packing snap ring is fitted closely with pressure-bearing deformation ring inner wall.
Further, the top upper prop chock lower end, which is dug, engagement annular groove, and sealing is equipped in the combination annular groove
Welt cushion rubber, the sealing welt cushion rubber outer end and pressure-bearing blanking plug upper end are interference fitted, the sealing welt cushion rubber inner end and
Gel layer is coated between the upper prop chock outer wall of top, the sealing welt cushion rubber is fixedly connected with top upper prop chock by gel layer,
Subtracted by the sealing welt cushion rubber added in plunger block on top convenient for making to push up upper prop chock and the engagement of pressure-bearing blanking plug upper end
Small top upper prop chock is connected to the sliding of pressure-bearing blanking plug upper end back side edge.
Further, it is equipped on the upside of the displacement wiper plug and accepts internal projecting ring, the undertaking internal projecting ring upper end and fluid are logical
Road lower end wall is fixedly connected, and the list leaf, which point turns excluder ring upper end, which to be dug, card and annular groove, the undertakings internal projecting ring by card with
Annular groove turns excluder ring with single leaf point and matches, stifled convenient for enhancing pressure-bearing by the undertaking internal projecting ring added on displacement wiper plug
Device lower end wall is filled in the fastening effect of displacement wiper plug, reduces leakage when formation fluid passes through fluid channel.
Further, the fluid conduit systems are socketed with internal pressure protection tube far from displacement wiper plug one end, and the internal pressure is anti-
It is equipped between protecting pipe and driven displacement plunger ring and consolidates collateral ring, described to consolidate collateral ring and be fixedly connected with fluid conduit systems, institute
Internal pressure protection tube outer end and interior pressure-bearing packing snap ring inner wall is stated to fit closely, it is collateral by consolidating of being socketed on fluid conduit systems
Ring and internal pressure protection tube reduce formation fluid in well convenient for stability of the enhancing fluid conduit systems in interior pressure-bearing packing snap ring
Impact in lower tubular column ontology when flowing to fluid conduit systems.
Further, the displacement wiper plug lower end is fixedly connected there are two the solid block of side pressure positioning, and two sides pressures are fixed
The solid block lower end in position and driven displacement plunger ring are interference fitted, and it is internal filled with multiple wrought alloys that the side, which presses and positions solid block,
Item positions solid block by the two sides pressure added in displacement wiper plug lower end, convenient for enhancing displacement wiper plug and driven displacement post
Plug ring engagement, while the mobile drive for reducing displacement wiper plug presses positioning solid when the movement that pressure positions solid block in turn results in
Block deformation.
Further, the wrought alloy material is two-way memory alloy, and multiple two-way memory alloys are pressed on side
Longitudinal arrangement in solid block is positioned, is positioned inside solid block by selecting two-way memory alloy to be filled in side pressure, convenient for making side pressure positioning
Gu block restores after pressure distortion.
Further, it is equipped with interference on the downside of the round bearing plate and fills a rubber ring, outer edge packing snap ring lower end is opened
It is carved with annular sheet-hold groove, the interference is filled a rubber ring and is horizontally disposed in annular sheet-hold groove, the annular sheet-hold groove inner wall and mistake
It is full of and fills a rubber ring clamping, a rubber ring is filled by the interference added on the downside of round bearing plate, convenient for mitigates pressure-bearing blanking plug and well
Collision when other component is installed in lower tubular column ontology extends the service life of pressure-bearing blanking plug.
3. beneficial effect
Compared with the prior art, the present invention has the advantages that
(1) this programme may be implemented to improve to inside pressure-bearing blanking plug, make spool filter disc and fixed pivot piece can be
It is separated under formation fluid impact, while realization sets effect, the reversed formation fluid that obstructs enters blanking plug, mitigates stratum
Fluid is during fluid channel internal flow, damage to the spool filter disc of blanking plug, the service life of lifting blockage device, together
When by the pressure of spool filter disc, reducing particulate matter barrier when formation fluid reverse flow between spool and mandrel, thus
Blanking plug is set to continue to keep packing effect.
(2) displacement wiper plug upper end is fixedly connected with clamping protrusion, is socketed with single leaf point in upper clamping protrusion and turns packing
Ring, single leaf point turns excluder ring upper end and is bonded with pressure-bearing blanking plug close to displacement wiper plug one end, and single leaf point turns excluder ring lower end
It is slidably connected with displacement wiper plug upper end, excluder ring is turned by the upper clamping protrusion and single leaf point added on displacement wiper plug,
Convenient for enhancing displacement wiper plug to the barriering effect of pressure-bearing blanking plug fluid channel.
(3) be equipped with pressure-bearing deformation ring between interior pressure-bearing packing snap ring and outer edge packing snap ring, pressure-bearing deformation ring upper end with
Interior pressure-bearing packing snap ring inner wall fitting, outer edge packing snap ring upper end are fixedly connected with pressure-bearing deformation ring inner end, pressure-bearing deformation ring
Lower end is fixedly connected with outer edge packing snap ring lower end, is added between snap ring and outer edge packing snap ring by insulating in interior pressure-bearing
Pressure-bearing deformation ring, form gap between snap ring and interior pressure-bearing packing snap ring convenient for insulating in outer edge, reduce outer edge packing
The gouging abrasion of snap ring and interior pressure-bearing packing snap ring after subtle flow under external pressure.
(4) interior pressure-bearing packing snap ring lower end is fixedly connected with round bearing plate, round bearing plate lower end and pressure-bearing deformation ring
Inner wall interference fit, by insulating the round bearing plate added of snap ring lower end in interior pressure-bearing, convenient for make interior pressure-bearing packing snap ring with
Pressure-bearing deformation ring inner wall fits closely.
(5) top upper prop chock lower end, which is dug, engagement annular groove, seals welt cushion rubber, sealing paste in conjunction with being equipped in annular groove
Side cushion rubber outer end and pressure-bearing blanking plug upper end are interference fitted, and are coated between sealing welt cushion rubber inner end and top upper prop chock outer wall solidifying
Glue-line, sealing welt cushion rubber are fixedly connected with top upper prop chock by gel layer, and the sealing added in plunger block on top is passed through
Welt cushion rubber reduces top upper prop chock and is connected to pressure-bearing blanking plug convenient for making to push up upper prop chock and the engagement of pressure-bearing blanking plug upper end
The sliding of upper end back side edge.
(6) equipped with internal projecting ring is accepted on the upside of displacement wiper plug, internal projecting ring upper end and the fixed company of fluid channel lower end wall are accepted
It connects, single leaf point, which turns excluder ring upper end, which to be dug, card and annular groove, accepts internal projecting ring by card and annular groove and turns excluder ring phase with single leaf point
Matching, by the undertaking internal projecting ring added on displacement wiper plug, convenient for enhancing pressure-bearing blanking plug lower end wall to displacement wiper plug
Fastening effect, reduce leakage when formation fluid passes through fluid channel.
(7) fluid conduit systems are socketed with internal pressure protection tube, internal pressure protection tube and driven shifting far from displacement wiper plug one end
Position plunger ring between be equipped with consolidate collateral ring, consolidate collateral ring and be fixedly connected with fluid conduit systems, internal pressure protection tube outer end with it is interior
Pressure-bearing packing snap ring inner wall fits closely, and consolidates collateral ring and internal pressure protection tube by what is be socketed on fluid conduit systems, is convenient for
Enhance stability of the fluid conduit systems in interior pressure-bearing packing snap ring, reduces convection current when formation fluid flows in down-hole string ontology
The impact of body canal.
(8) displacement wiper plug lower end, which is fixedly connected, positions solid block there are two side pressure, two sides pressures position solid block lower ends with from
Dynamic displacement plunger ring interference fit, it is internal filled with multiple wrought alloy items that side, which presses and positions solid block, by displacement wiper plug
Two sides pressure that lower end is added positions solid block, engages convenient for enhancing displacement wiper plug with driven displacement plunger ring, while reducing shifting
The solid block deformation of positioning is pressed in the mobile drive of position wiper plug when the movement that pressure positions solid block in turn results in.
(9) wrought alloy material is two-way memory alloy, and multiple two-way memory alloys position longitudinal in solid block in side pressure
Arrangement is positioned inside solid block by selecting two-way memory alloy to be filled in side pressure, convenient for making side pressure position solid block in pressure distortion
After restore.
(10) it is equipped with interference on the downside of round bearing plate and fills a rubber ring, outer edge packing snap ring lower end, which is dug, has annular to hold piece
Slot, interference are filled a rubber ring and are horizontally disposed in annular sheet-hold groove, and annular sheet-hold groove inner wall and interference are filled a rubber ring and be clamped, by
A rubber ring is filled in the interference added on the downside of round bearing plate, is pacified convenient for mitigating other component in pressure-bearing blanking plug and down-hole string ontology
Collision when dress extends the service life of pressure-bearing blanking plug.
Detailed description of the invention
Fig. 1 is longitdinal cross-section diagram of the invention；
Fig. 2 is the structural schematic diagram in Fig. 1 at A；
Fig. 3 is the structural schematic diagram of present invention displacement packing plug portion.
Figure label explanation:
1 down-hole string ontology, 2 pressure-bearing blanking plugs, 3 top upper prop chocks, 4 outer edges packing snap ring, 5 pressure-bearing deformation rings, in 6
Pressure-bearing packing snap ring, 7 round bearing plates, 8 fluid conduit systems, 9 consolidate collateral ring, 10 internal pressure protection tubes, 11 driven displacement plungers
Ring, 12 interference fill a rubber ring, 13 displacement wiper plugs, 14 sides pressure position solid block, clamping protrusion, 16 sealing welt cushion rubbers, 17 on 15
Dan Yefen turns excluder ring, 18 undertaking internal projecting rings.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description；Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", " top/bottom end "
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understand
For indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is set
Be equipped with ", " be arranged/connect ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, be also possible to removable
Connection is unloaded, or is integrally connected, can be mechanical connection, is also possible to be electrically connected, can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements, for the ordinary skill in the art, can be specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
Embodiment 1:
Please refer to Fig. 1-3, a kind of separate type pressure-bearing blanking plug and its application method for down-hole string, including downhole tubular
Column ontology 1 is equipped with pressure-bearing blanking plug 2 inside down-hole string ontology 1, top upper prop chock 3, pressure-bearing is equipped on the upside of pressure-bearing blanking plug 2
2 upper end of blanking plug, which is dug, hydroslatic joint slot, and pressure-bearing blanking plug 2 is matched by hydroslatic joint slot and top 3 lower end of upper prop chock,
2 lower end of pressure-bearing blanking plug is fixedly connected with outer edge packing snap ring 4, and outer edge insulates in 4 outer end of snap ring and down-hole string ontology 1
Wall fits closely, and outer edge insulates and is equipped with interior pressure-bearing packing snap ring 6 inside snap ring 4, interior pressure-bearing packing 6 upper and lower ends of snap ring difference
It is bonded and is fixedly connected with outer edge packing 4 inner segment of snap ring, be equipped with fluid conduit systems 8, fluid conduit systems 8 on the inside of interior pressure-bearing packing snap ring 6
Upper end is fixedly connected with driven displacement plunger ring 11, and driven 11 upper end of displacement plunger ring is connected with displacement wiper plug 13, and pressure-bearing is stifled
Digging among plug device 2 has a fluid channel, and displacement 13 upper end of wiper plug matches with the fluid channel in pressure-bearing blanking plug 2, can be with
It realizes to being improved inside pressure-bearing blanking plug, divide spool filter disc and fixed pivot piece can under formation fluid impact
From while realization sets effect, the reversed formation fluid that obstructs enters blanking plug, mitigates formation fluid in fluid channel inside stream
During dynamic, the damage to the spool filter disc of blanking plug, the service life of lifting blockage device, while passing through formation fluid reverse flow
To the pressure of spool filter disc when dynamic, particulate matter barrier is reduced between spool and mandrel, so that blanking plug be made to continue to keep packing
Effect.
Referring to Fig. 2, displacement 13 upper end of wiper plug is fixedly connected with clamping protrusion 15, it is socketed in upper clamping protrusion 15
Dan Yefen turns excluder ring 17, and single leaf point turns 17 upper end of excluder ring and is bonded with pressure-bearing blanking plug 2 close to displacement 13 one end of wiper plug, and
Dan Yefen turns 17 lower end of excluder ring and is slidably connected with displacement 13 upper end of wiper plug, passes through the upper card added on displacement wiper plug 13
It connects protrusion 15 and single leaf point turns excluder ring 17, the barrier of 2 fluid channel of pressure-bearing blanking plug is imitated convenient for enhancing displacement wiper plug 13
Fruit.
Referring to Fig. 2, being equipped with pressure-bearing deformation ring 5, pressure-bearing shape between interior pressure-bearing packing snap ring 6 and outer edge packing snap ring 4
Become 5 upper end of ring to be bonded with interior pressure-bearing packing 6 inner wall of snap ring, outer edge insulates 4 upper end of snap ring and 5 inner end of pressure-bearing deformation ring and fixes and connect
It connects, 5 lower end of pressure-bearing deformation ring is fixedly connected with outer edge packing 4 lower end of snap ring, by insulating snap ring 6 and outer edge in interior pressure-bearing
The pressure-bearing deformation ring 5 added between packing snap ring 4 is formed between snap ring 4 and interior pressure-bearing packing snap ring 6 convenient for insulating in outer edge
Gap reduces the gouging abrasion of outer edge packing snap ring 4 and interior pressure-bearing packing snap ring 6 after subtle flow under external pressure.
Referring to Fig. 2, interior pressure-bearing packing 6 lower end of snap ring is fixedly connected with round bearing plate 7, round 7 lower end of bearing plate with
5 inner wall of pressure-bearing deformation ring interference fit, by insulating the round bearing plate 7 that 6 lower end of snap ring is added in interior pressure-bearing, convenient for making interior hold
Press seal is fitted closely every snap ring 6 and 5 inner wall of pressure-bearing deformation ring.
Referring to Fig. 1, top 3 lower end of upper prop chock, which is dug, engagement annular groove, welt glue is sealed in conjunction with being equipped in annular groove
Circle 16, sealing 16 outer end of welt cushion rubber and 2 upper end of pressure-bearing blanking plug are interference fitted, sealing 16 inner end of welt cushion rubber and top upper plug
Gel layer is coated between 3 outer wall of block, sealing welt cushion rubber 16 is fixedly connected with top upper prop chock 3 by gel layer, by pushing up
The sealing welt cushion rubber 16 added in upper prop chock 3 reduces top convenient for making to push up upper prop chock 3 and the engagement of 2 upper end of pressure-bearing blanking plug
Upper prop chock 3 is connected to the sliding of 2 upper end back side edge of pressure-bearing blanking plug.
Internal projecting ring 18 is accepted referring to Fig. 2, being equipped on the upside of displacement wiper plug 13, accepts 18 upper end of internal projecting ring and fluid channel
Lower end wall is fixedly connected, and single leaf, which point turns 17 upper end of excluder ring, which to be dug, card and annular groove, accept internal projecting ring 18 by card and annular groove and
Dan Yefen turns excluder ring 17 and matches, stifled convenient for enhancing pressure-bearing by the undertaking internal projecting ring 18 added on displacement wiper plug 13
2 lower end wall of device is filled in the fastening effect of displacement wiper plug 13, reduces leakage when formation fluid passes through fluid channel.
Referring to Fig. 1, fluid conduit systems 8 are socketed with internal pressure protection tube 10, internal pressure protection far from displacement 13 one end of wiper plug
It is equipped between casing 10 and driven displacement plunger ring 11 and consolidates collateral ring 9, consolidated collateral ring 9 and be fixedly connected with fluid conduit systems 8, it is interior
Pressure 10 outer end of protection tube and interior pressure-bearing insulate 6 inner wall of snap ring and fit closely, collateral by consolidating of being socketed on fluid conduit systems 8
Ring 9 and internal pressure protection tube 10 reduce formation fluid convenient for stability of the enhancing fluid conduit systems 8 in interior pressure-bearing packing snap ring 6
Impact when being flowed in down-hole string ontology 1 to fluid conduit systems 8.
Referring to Fig. 3, displacement 13 lower end of wiper plug is fixedly connected, there are two side pressures to position solid block 14, and two side pressure positioning are solid
14 lower end of block and driven displacement plunger ring 11 interference fit, it is that inside is filled with multiple wrought alloy items that side pressure, which positions solid block 14,
Solid block 14 is positioned by the two sides pressure added in displacement 13 lower end of wiper plug, convenient for enhancing displacement wiper plug 13 and driven displacement
Plunger ring 11 engages, while reducing the mobile drive of displacement wiper plug 13 when the movement that pressure positions solid block 14 in turn results in
Pressure positions solid 14 deformation of block.
Wrought alloy material is two-way memory alloy, and multiple two-way memory alloys are positioned in solid block 14 in side pressure and longitudinally arranged
Column are positioned inside solid block 14 by selecting two-way memory alloy to be filled in side pressure, are become convenient for making side pressure position solid block 14 in pressure
It is restored after shape.
Referring to Fig. 2, being equipped with interference on the downside of round bearing plate 7 fills a rubber ring 12, outer edge packing 4 lower end of snap ring, which is dug, to be had
Annular sheet-hold groove, interference are filled a rubber ring 12 and are horizontally disposed in annular sheet-hold groove, and a rubber ring is filled in annular sheet-hold groove inner wall and interference
12 clampings, fill a rubber ring 12 by the interference added on the downside of round bearing plate 7, convenient for mitigating pressure-bearing blanking plug 2 and downhole tubular
Collision when other component is installed in column ontology 1 extends the service life of pressure-bearing blanking plug 2.
The present invention may be implemented to improve to inside pressure-bearing blanking plug, make spool filter disc and fixed pivot piece can be on stratum
It is separated under fluid impact, while realization sets effect, the reversed formation fluid that obstructs enters blanking plug, mitigates formation fluid
During fluid channel internal flow, damage to the spool filter disc of blanking plug, the service life of lifting blockage device is led to simultaneously
To the pressure of spool filter disc when crossing formation fluid reverse flow, particulate matter barrier is reduced between spool and mandrel, to make to block up
Plug device persistently keeps packing to act on.
The foregoing is intended to be a preferred embodiment of the present invention；But scope of protection of the present invention is not limited thereto.
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
It improves design and is subject to equivalent substitution or change, should be covered by the scope of protection of the present invention.
Claims (10)
1. a kind of separate type pressure-bearing blanking plug and its application method for down-hole string, it is characterised in that: including down-hole string
Ontology (1), the down-hole string ontology (1) is internal to be equipped with pressure-bearing blanking plug (2), and top is equipped on the upside of the pressure-bearing blanking plug (2)
Upper prop chock (3), pressure-bearing blanking plug (2) upper end, which is dug, hydroslatic joint slot, and the pressure-bearing blanking plug (2) is connect by pressure-bearing
Mouth slot matches with top upper prop chock (3) lower end, and pressure-bearing blanking plug (2) lower end is fixedly connected with outer edge packing snap ring
(4), outer edge packing snap ring (4) outer end is fitted closely with down-hole string ontology (1) inner wall, and the outer edge insulates snap ring
(4) internal to be equipped with interior pressure-bearing packing snap ring (6), described interior pressure-bearing packing snap ring (6) upper and lower ends are insulated with outer edge respectively blocks
The fitting of ring (4) inner segment is fixedly connected, and is equipped with fluid conduit systems (8) on the inside of interior pressure-bearing packing snap ring (6), the fluid conduit systems
(8) upper end is fixedly connected with driven displacement plunger ring (11), and driven displacement plunger ring (11) upper end is connected with displacement packing
It fills in (13), digging among the pressure-bearing blanking plug (2) has fluid channel, the displacement wiper plug (13) upper end and pressure-bearing blanking plug
(2) fluid channel in matches.
2. a kind of separate type pressure-bearing blanking plug and its application method for down-hole string according to claim 1, special
Sign is: displacement wiper plug (13) upper end is fixedly connected with clamping protrusion (15), covers in the upper clamping raised (15)
It is connected to single leaf point to turn excluder ring (17), the list leaf point turns excluder ring (17) upper end and pressure-bearing blanking plug (2) and insulates close to displacement
The fitting of (13) one end is filled in, and single leaf point turns excluder ring (17) lower end and is slidably connected with displacement wiper plug (13) upper end.
3. a kind of separate type pressure-bearing blanking plug and its application method for down-hole string according to claim 1, special
Sign is: being equipped with pressure-bearing deformation ring (5), the pressure-bearing between interior pressure-bearing packing snap ring (6) and outer edge packing snap ring (4)
Deformation ring (5) upper end is bonded with interior pressure-bearing packing snap ring (6) inner wall, outer edge packing snap ring (4) upper end and pressure-bearing deformation
Ring (5) inner end is fixedly connected, and the pressure-bearing deformation ring (5) lower end is fixedly connected with outer edge packing snap ring (4) lower end.
4. a kind of separate type pressure-bearing blanking plug and its application method for down-hole string according to claim 3, special
Sign is: described interior pressure-bearing packing snap ring (6) lower end is fixedly connected with round bearing plate (7), described circle bearing plate (7) lower end
It is interference fitted with pressure-bearing deformation ring (5) inner wall.
5. a kind of separate type pressure-bearing blanking plug and its application method for down-hole string according to claim 1, special
Sign is: the top upper prop chock (3) lower end, which is dug, engagement annular groove, and sealing welt cushion rubber is equipped in the combination annular groove
(16), the sealing welt cushion rubber (16) outer end and pressure-bearing blanking plug (2) upper end are interference fitted, the sealing welt cushion rubber (16)
Gel layer is coated between inner end and top upper prop chock (3) outer wall, the sealing welt cushion rubber (16) passes through with top upper prop chock (3)
Gel layer is fixedly connected.
6. a kind of separate type pressure-bearing blanking plug and its application method for down-hole string according to claim 1 or 2,
It is characterized in that: being equipped on the upside of the displacement wiper plug (13) and accept internal projecting ring (18), the undertaking internal projecting ring (18) upper end and stream
Body channel lower end wall is fixedly connected, and the list leaf point, which turns excluder ring (17) upper end, which to be dug, card and annular groove, the undertaking internal projecting ring
(18) turn excluder ring (17) with single leaf point by card and annular groove to match.
7. a kind of separate type pressure-bearing blanking plug and its application method for down-hole string according to claim 3, special
Sign is: the fluid conduit systems (8) are socketed with internal pressure protection tube (10) far from displacement wiper plug (13) one end, and the internal pressure is anti-
It is equipped with and consolidates collateral ring (9) between protecting pipe (10) and driven displacement plunger ring (11), the collateral ring (9) that consolidates is led with fluid
Pipe (8) is fixedly connected, and internal pressure protection tube (10) outer end is fitted closely with interior pressure-bearing packing snap ring (6) inner wall.
8. a kind of separate type pressure-bearing blanking plug and its application method for down-hole string according to claim 1, special
Sign is: displacement wiper plug (13) lower end is fixedly connected to press there are two side and position solid block (14), two sides pressure positioning
Gu block (14) lower end and driven displacement plunger ring (11) are interference fitted, it is internal filled with multiple that the side pressure, which positions solid block (14),
Wrought alloy item.
9. a kind of separate type pressure-bearing blanking plug and its application method for down-hole string according to claim 8, special
Sign is: the wrought alloy material is two-way memory alloy, and multiple two-way memory alloys position solid block in side pressure
(14) interior longitudinal arrangement.
10. a kind of separate type pressure-bearing blanking plug and its application method for down-hole string according to claim 1 or 3,
It is filled a rubber ring (12) it is characterized by: being equipped with interference on the downside of the circle bearing plate (7), under outer edge packing snap ring (4)
End, which is dug, annular sheet-hold groove, and the interference is filled a rubber ring (12) and is horizontally disposed in annular sheet-hold groove, the annular sheet-hold groove
A rubber ring (12) clamping is filled in inner wall and interference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910491268.2A CN110242243A (en) | 2019-06-06 | 2019-06-06 | A kind of separate type pressure-bearing blanking plug and its application method for down-hole string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910491268.2A CN110242243A (en) | 2019-06-06 | 2019-06-06 | A kind of separate type pressure-bearing blanking plug and its application method for down-hole string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110242243A true CN110242243A (en) | 2019-09-17 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910491268.2A Pending CN110242243A (en) | 2019-06-06 | 2019-06-06 | A kind of separate type pressure-bearing blanking plug and its application method for down-hole string |
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| CN (1) | CN110242243A (en) |
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| US5413180A (en) * | 1991-08-12 | 1995-05-09 | Halliburton Company | One trip backwash/sand control system with extendable washpipe isolation |
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| CN106988704A (en) * | 2016-01-21 | 2017-07-28 | 中国石油化工股份有限公司 | A kind of down-hole string pressure-bearing blanking plug |
| CN208106375U (en) * | 2018-01-26 | 2018-11-16 | 中国石油化工股份有限公司 | A kind of down-hole string self-sealing blanking plug |
| WO2019050512A1 (en) * | 2017-09-06 | 2019-03-14 | Halliburton Energy Services, Inc. | Frac plug setting tool with triggered ball release capability |
| CN210977385U (en) * | 2019-06-06 | 2020-07-10 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Separated pressure-bearing blanking plug for underground pipe column |
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2019
- 2019-06-06 CN CN201910491268.2A patent/CN110242243A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5413180A (en) * | 1991-08-12 | 1995-05-09 | Halliburton Company | One trip backwash/sand control system with extendable washpipe isolation |
| CN106988704A (en) * | 2016-01-21 | 2017-07-28 | 中国石油化工股份有限公司 | A kind of down-hole string pressure-bearing blanking plug |
| CN205605160U (en) * | 2016-05-05 | 2016-09-28 | 中国石油集团川庆钻探工程有限公司 | Broken tail pipe blanking plug |
| WO2019050512A1 (en) * | 2017-09-06 | 2019-03-14 | Halliburton Energy Services, Inc. | Frac plug setting tool with triggered ball release capability |
| CN208106375U (en) * | 2018-01-26 | 2018-11-16 | 中国石油化工股份有限公司 | A kind of down-hole string self-sealing blanking plug |
| CN210977385U (en) * | 2019-06-06 | 2020-07-10 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Separated pressure-bearing blanking plug for underground pipe column |
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