CN108894749A - A kind of screw thread is given up solvable bridge plug - Google Patents
A kind of screw thread is given up solvable bridge plug Download PDFInfo
- Publication number
- CN108894749A CN108894749A CN201810803595.2A CN201810803595A CN108894749A CN 108894749 A CN108894749 A CN 108894749A CN 201810803595 A CN201810803595 A CN 201810803595A CN 108894749 A CN108894749 A CN 108894749A
- Authority
- CN
- China
- Prior art keywords
- slips
- bridge plug
- screw thread
- cone
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012856 packing Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 7
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims description 4
- 239000005871 repellent Substances 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000011149 active material Substances 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 2
- 238000004090 dissolution Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 229910001051 Magnalium Inorganic materials 0.000 description 1
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing 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
Landscapes
- 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)
- Coating Apparatus (AREA)
Abstract
The invention belongs to oil drilling and extracting equipment fields, a kind of screw thread is provided to give up solvable bridge plug, including central tube, central tube is axially hollow structure, center pipe outer wall is from top to bottom successively arranged slips and stops ring, upper slips, upper cone, upper back band, packing element, lower back band, lower cone, lower slips and guide shoe, the top of the central tube is equipped with the diameter-changing cavity for placing solvable ball, the central tube lower end is threadedly coupled with guide shoe, release ring is equipped with inside guide shoe, guide shoe is threadedly coupled with release ring, and release ring upper surface is bonded with central tube lower end surface；The release ring is threadedly coupled with releasing tool；The screw thread solvable bridge plug of giving up is dissolvable in water electrolyte solution.Screw thread of the present invention solvable bridge plug of giving up is given up mode using screw thread, and not only releasing gadget is simple and reliable, and force value of giving up is accurate, can also reduce the insoluble substance stayed in well.Meanwhile as long as the screw thread is given up solvable bridge plug temperature at 50 DEG C or more, so that it may meet the dissolution conditions of bridge plug.
Description
Technical field
The invention belongs to oil drilling and extracting equipment fields, and in particular to a kind of screw thread is given up solvable bridge plug.
Background technique
Currently, solvable bridge plug has more and more been applied in the staged fracturing construction of unconventional oil and gas, but mesh
Preceding solvable bridge plug or use release bolt in the market is given up, and giving up, structure is complicated, and assembled in situ is difficult or uses shear pin
Nail is given up, and shear force value is unstable, influences subsequent construction.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art described above, a kind of screw thread is provided and is given up solvable bridge plug, it should
Solvable bridge plug is given up mode using screw thread, and not only releasing gadget is simple and reliable, and force value of giving up is accurate, can also reduce and stay in well
Insoluble substance, meanwhile, as long as the screw thread is given up, solvable bridge plug temperature is at 50 DEG C or more, so that it may meet the molten of bridge plug
Solution condition.
The technical solution used to solve the technical problems of the present invention is that：A kind of screw thread is given up solvable bridge plug, including central tube,
Central tube be axially hollow structure, center pipe outer wall be from top to bottom successively arranged slips stop ring, upper slips, upper cone, upper back band,
Packing element, lower back band, lower cone, lower slips and guide shoe, cone are wedged in slips inner conical surface, and the top of the central tube, which is equipped with, to be used for
Place the diameter-changing cavity of solvable ball, the tapered conical surface for being 10 °~20 ° in the section of the diameter-changing cavity；Slips stops ring upper end medial and lateral point
Not She You a step, center pipe outer wall is equipped with another step for stopping inner side step matching in ring upper end with slips, and the slips stops
Ring is equipped with threaded hole at 3, and shear pin passes through the threaded hole and is fixed in the pipe outer wall of center, the central tube lower end and guide shoe
It is threadedly coupled, release ring is equipped with inside guide shoe, guide shoe is threadedly coupled with release ring, release ring upper surface and central tube lower end face paste
It closes；The release ring is threadedly coupled with releasing tool；The screw thread solvable bridge plug of giving up is dissolvable in water electrolyte solution.
In the above-mentioned technical solutions, bridge plug ontology, including central tube, slips stop ring, upper slips, upper cone, upper back band, under
Back band, lower cone, lower slips, guide shoe, release ring, be made of thermoplastic polymer, the thermoplastic polymer by almag,
Water-soluble di acid and dihydric alcohol are polymerized, and bridge plug ontology can be molten in the electrolyte solution of 50 DEG C or more the roots containing chlorine
Solution.
In the above-mentioned technical solutions, the upper slips are made of 8 slips, and 4 ceramic teeth are inlayed on every slips, on
2 slips rings are assembled on slips；The lower slips are identical as upper slips structure, reversed arrangement.
In the above-mentioned technical solutions, the slips ring surface is sprayed with water-repellent paint.
In the above-mentioned technical solutions, the upper cone has 8 planes, each plane and a piece of slips cone match, epicone
The cone angle of body is 10 °~20 °, and upper cone is equipped with starting pin；The lower cone is identical as upper cone structure, reversed arrangement.
In the above-mentioned technical solutions, for the packing element using a single packing element, packing element both ends are respectively equipped with back band and lower back
Circle, upper back band are made of inside and outside back band, are connected between inside and outside back band by bonding way.Lower back band and upper back band structure phase
Together, reversed arrangement.
In the above-mentioned technical solutions, the packing element is made of polyurethane material, and water-sensitive active material is added to elastomer
In, packing element can dissolve in 50 DEG C or more of water or aqueous solution.
In the above-mentioned technical solutions, the guide shoe lower end uses pyramidal structure, and guide shoe upper end is equipped with tightening pin.
In the above-mentioned technical solutions, the release ring inner hole top is thread surface, and thread surface is sprayed with water-repellent paint, releases
Ring inner hole bottom is put equipped with a boss, release ring lower end surface is equipped with a cruciform groove.
In the above-mentioned technical solutions, releasing tool is contacted with solvable bridge plug center inside pipe wall using "O"-ring.
The beneficial effects of the present invention are：Screw thread of the present invention solvable bridge plug of giving up is given up mode using screw thread, is not only given up
Mechanism is simple and reliable, and force value of giving up is accurate, can also reduce the insoluble substance stayed in well.Meanwhile the screw thread is given up
As long as solvable bridge plug temperature is at 50 DEG C or more, so that it may meet the dissolution conditions of bridge plug.
Detailed description of the invention
Fig. 1 is that screw thread of the present invention is given up solvable bridge plug assembly figure.
Fig. 2 is bridge plug of the present invention and setting tool connection schematic diagram.
Wherein：1 solvable ball, 2 central tubes, 3 slips stop ring, 4 shear pins, 5 upper slips rings, 6 upper slips, 7 upper cones, and 8
First starts pin, back band on 9,10 packing elements, 11 lower back bands, 12 second starting pins, 13 lower cones, 14 lower slips, 15 lower cards
Watt ring, 16 first tightening pins, 17 guide shoes, 18 release rings, 19 second tightening pins, 20 setting sleeves, 21 third tightening pins, 22
Adjust connector, 23 locking springs, 24 pull rods, 25 "O"-rings.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
As shown in Figure 1, giving up solvable bridge plug, including central tube 2 the present embodiment provides a kind of screw thread, central tube 2 is axial
Hollow structure, 2 outer wall of central tube be from top to bottom successively arranged slips stop ring 3, upper slips 6, upper cone 7, upper back band 9, packing element 10,
Lower back band 11, lower cone 13, lower slips 14 and guide shoe 17, cone are wedged in slips inner conical surface, and the top of the central tube 2 is equipped with
For placing the diameter-changing cavity of solvable ball, the tapered conical surface for being 10 °~20 ° in the section of the diameter-changing cavity；Slips stops in 3 upper end of ring,
Outside is respectively equipped with a step, and outside step plays centralizing function to setting sleeve, and 2 outer wall of central tube is equipped with to be stopped on ring 3 with slips
Another step for holding inner side step to match, the slips stops ring 3 and is equipped with threaded hole at 3, for filling shear pin 4, in bridge plug
Enter well prevents premature setting in the process；2 lower end of central tube is threadedly coupled with guide shoe 17, and release ring is equipped with inside guide shoe 17
18, guide shoe 17 is threadedly coupled with release ring 18, and release 18 upper surface of ring is bonded with 2 lower end surface of central tube；The screw thread is given up solvable
Bridge plug is dissolvable in water electrolyte solution.
Further, bridge plug ontology, including central tube 2, slips stop ring 3, upper slips 6（It does not include ceramic tooth）, upper cone
7, upper back band 9, lower back band 11, lower cone 13, lower slips 14（It does not include ceramic tooth）, guide shoe 17, release ring 18, closed by magnalium
The thermoplastic polymer that gold, water-soluble di acid and dihydric alcohol are polymerized is made, in the electrolysis of 50 DEG C or more the roots containing chlorine
It can be dissolved in matter solution.
Further, the upper slips 6 are made of 8 slips, inlay 4 ceramic teeth on every slips, on upper slips 6
Assemble 2 slips rings；The lower slips 14 are identical as 6 structure of upper slips, reversed arrangement.
Moreover, the slips ring, for preventing bridge plug premature setting during the well entry process, slips ring surface is sprayed with waterproof painting
Material, it is ensured that slips ring will not be reduced rupture force value in well by solution corrosion.
Further, the upper cone 7 has 8 planes, each plane and a piece of slips cone match, the cone angle of upper cone
It is 10 °~20 °, convenient for slips, when setting, radial dilatation, uniform anchor sleeve are additionally provided with starting pin on upper cone；It is described
Lower cone 13 is identical as 7 structure of upper cone, reversed arrangement.
Further, for the packing element 10 using a single packing element, 10 both ends of packing element are respectively equipped with back band 9 and lower back band
11, upper back band 9 is made of inside and outside back band, is connected between inside and outside back band by bonding way, for bridge plug when bearing high pressure
Protect packing element injury-free；Lower back band 11 is identical as upper 9 structure of back band, reversed arrangement.
Moreover, the packing element is made of polyurethane material, water-sensitive active material is added in elastomer, water destruct elasticity
In body in polymer chain the key of sensitive chain to help packing element hydrolytic degradation.Packing element can in 50 DEG C or more of water or aqueous solution
With dissolution.
Further, 17 lower end of guide shoe uses pyramidal structure, is easier to pass through well head during tripping in convenient for bridge plug
And at collar.17 upper end of guide shoe is additionally provided with tightening pin.
Further, the 18 inner hole top of release ring is thread surface, and release ring is threadedly coupled with releasing tool, screw thread
Surface is sprayed with water-repellent paint, prevents the etch of internal screw thread solution in well from declining low bridge plug and sets force value；Discharge bottom hole in ring
Portion is equipped with a boss, plays axial limiting when for connecting with releasing gadget；It is cross equipped with one to discharge ring lower end surface
Groove discharges ring for assembly and disassembly.
Further, releasing tool pull rod 24 is contacted with solvable 2 inner wall of bridge plug central tube using "O"-ring 25, is being pumped
When bridge plug, impurity can be hindered to enter solvable bridge plug and given up position, it is ensured that bridge plug reliable releasing.
As shown in Fig. 2, cable igniting, adjustment connector 22 connects setting tool and lock after pumping bridge plug to predetermined level
Tight spring 23, pull rod 24, pull rod 24, which is connected through a screw thread, discharges ring 18, on cable setting tool transmitting thrust to setting sleeve 20,
Setting sleeve 20 pushes slips to stop ring 3, cuts downlink after shear pin 4, squeezes upper slips 6, upper cone 7, cuts the first start pin
Nail 8 continues to squeeze back band 9, packing element 10, lower back band 11, cuts the second starting pin 12, continues to squeeze lower cone 13, lower card
Watts 14, and with a little blow-up, while upper slips 6 being driven to squeeze upper cone 7, lower cone 13 squeezes lower slips 14.On reaching
When the fracture pressure of slips ring 5 and lower slips ring 15, upper and lower slips is displaced outwardly respectively, is engaged casing, upper slips 6 and lower card
Watts 14 cooperation upper cones 7 form self-locking with lower cone 13, and 10 blow-up of packing element is bonded with internal surface of sleeve pipe.In the thrust of setting sleeve 20
Under, continue to squeeze packing element 10, when reaching the cutting force value of release 18 internal screw thread of ring, completes giving up for bridge plug and set.When need
When will be to bridge plug top payzone pressure break, pitching be pumped in ball 1 to the diameter-changing cavity on 2 top of central tube, and pressure break is carried out after sealing, is being pressed
During power is raised, the piston thrust that pressure generates central tube 2 pushes 2 downlink of central tube, until the upper end of central tube 2
It resists slips and stops 3 upper end of ring.After the completion of measure, returned in drain on the stratum containing a certain concentration electrolyte solution, certain
It can have been dissolved in time, leave pit shaft full-bore for subsequent production.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvement or deformation can also be made, these are improved or deformation is also answered
It is considered as protection scope of the present invention.
Claims (10)
- The solvable bridge plug 1. a kind of screw thread is given up, including central tube, central tube are axially hollow structure, and center pipe outer wall is from top to bottom It is successively arranged slips and stops ring, upper slips, upper cone, upper back band, packing element, lower back band, lower cone, lower slips and guide shoe, cone wedge Enter in slips inner conical surface, it is characterised in that：The top of the central tube is equipped with the diameter-changing cavity for placing solvable ball, the diameter-changing cavity The tapered conical surface for being 10 °~20 ° in section；Slips stops ring upper end medial and lateral and is respectively equipped with a step, sets in the pipe outer wall of center There is another step for stopping inner side step matching in ring upper end with slips, the slips stops ring and is equipped with threaded hole at 3, and shear pin is worn The threaded hole to be crossed to be fixed in the pipe outer wall of center, the central tube lower end is threadedly coupled with guide shoe, release ring is equipped with inside guide shoe, Guide shoe is threadedly coupled with release ring, and release ring upper surface is bonded with central tube lower end surface；The release ring and releasing tool screw thread Connection；The screw thread solvable bridge plug of giving up is dissolvable in water electrolyte solution.
- The solvable bridge plug 2. screw thread according to claim 1 is given up, it is characterised in that：Bridge plug ontology, including central tube, slips Only ring, upper slips, upper cone, upper back band, lower back band, lower cone, lower slips, guide shoe, release ring, by thermoplastic polymer system Be polymerized at, the thermoplastic polymer by almag, water-soluble di acid and dihydric alcohol, bridge plug ontology at 50 DEG C and with On the root containing chlorine electrolyte solution in can dissolve.
- The solvable bridge plug 3. screw thread according to claim 1 is given up, it is characterised in that：The upper slips are made of 8 slips, 4 ceramic teeth are inlayed on every slips, assemble 2 slips rings on upper slips；The lower slips are identical as upper slips structure, instead To arrangement.
- The solvable bridge plug 4. screw thread according to claim 3 is given up, it is characterised in that：The slips ring surface is sprayed with waterproof painting Material.
- The solvable bridge plug 5. screw thread according to claim 1 is given up, it is characterised in that：The upper cone has 8 planes, each Plane and a piece of slips cone match, the cone angle of upper cone are 10 °~20 °, and upper cone is equipped with starting pin；The lower cone It is identical as upper cone structure, reversed arrangement.
- The solvable bridge plug 6. screw thread according to claim 1 is given up, it is characterised in that：The packing element uses a single packing element, Packing element both ends are respectively equipped with back band and lower back band, and upper back band is made of inside and outside back band, pass through bonding side between inside and outside back band Formula connection；Lower back band is identical as upper back band structure, reversed arrangement.
- The solvable bridge plug 7. screw thread according to claim 6 is given up, it is characterised in that：The packing element is by polyurethane material system At water-sensitive active material being added in elastomer, packing element can dissolve in 50 DEG C or more of water or aqueous solution.
- The solvable bridge plug 8. screw thread according to claim 1 is given up, it is characterised in that：The guide shoe lower end uses taper knot Structure, guide shoe upper end are equipped with tightening pin.
- The solvable bridge plug 9. screw thread according to claim 8 is given up, it is characterised in that：The release ring inner hole top is screw thread Surface, thread surface are sprayed with water-repellent paint, and release ring inner hole bottom is equipped with a boss, and release ring lower end surface is equipped with a cross Type groove.
- The solvable bridge plug 10. screw thread according to claim 1 is given up, it is characterised in that：Releasing tool is adopted with center inside pipe wall It is contacted with "O"-ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810803595.2A CN108894749A (en) | 2018-07-20 | 2018-07-20 | A kind of screw thread is given up solvable bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810803595.2A CN108894749A (en) | 2018-07-20 | 2018-07-20 | A kind of screw thread is given up solvable bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108894749A true CN108894749A (en) | 2018-11-27 |
Family
ID=64351398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810803595.2A Pending CN108894749A (en) | 2018-07-20 | 2018-07-20 | A kind of screw thread is given up solvable bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108894749A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10914132B1 (en) | 2019-10-26 | 2021-02-09 | Petro-King Energy Technology (Huizhou) Co., Ltd. | Large-diameter soluble bridge plug |
| CN112576219A (en) * | 2020-12-04 | 2021-03-30 | 中石化石油工程技术服务有限公司 | Rubber-cylinder-free fully-soluble bridge plug, setting connection tool thereof and use method |
| CN112576220A (en) * | 2020-12-04 | 2021-03-30 | 中石化石油工程技术服务有限公司 | Large-drift-diameter expansion type fully-soluble bridge plug, setting connection tool thereof and use method |
| CN113107417A (en) * | 2020-01-13 | 2021-07-13 | 中国石油天然气股份有限公司 | Soluble releasing plug |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080190600A1 (en) * | 2004-02-27 | 2008-08-14 | Smith International, Inc. | Drillable bridge plug |
| CN206513345U (en) * | 2017-02-10 | 2017-09-22 | 四川省威沃敦化工有限公司 | A kind of solvable bridging plug |
| CN207268169U (en) * | 2017-09-22 | 2018-04-24 | 四机赛瓦石油钻采设备有限公司 | A kind of efficiently speed bores bridge plug |
| CN208749329U (en) * | 2018-07-20 | 2019-04-16 | 四机赛瓦石油钻采设备有限公司 | A kind of screw thread is given up solvable bridge plug |
-
2018
- 2018-07-20 CN CN201810803595.2A patent/CN108894749A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080190600A1 (en) * | 2004-02-27 | 2008-08-14 | Smith International, Inc. | Drillable bridge plug |
| CN206513345U (en) * | 2017-02-10 | 2017-09-22 | 四川省威沃敦化工有限公司 | A kind of solvable bridging plug |
| CN207268169U (en) * | 2017-09-22 | 2018-04-24 | 四机赛瓦石油钻采设备有限公司 | A kind of efficiently speed bores bridge plug |
| CN208749329U (en) * | 2018-07-20 | 2019-04-16 | 四机赛瓦石油钻采设备有限公司 | A kind of screw thread is given up solvable bridge plug |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10914132B1 (en) | 2019-10-26 | 2021-02-09 | Petro-King Energy Technology (Huizhou) Co., Ltd. | Large-diameter soluble bridge plug |
| CN113107417A (en) * | 2020-01-13 | 2021-07-13 | 中国石油天然气股份有限公司 | Soluble releasing plug |
| CN113107417B (en) * | 2020-01-13 | 2022-05-10 | 中国石油天然气股份有限公司 | Soluble releasing plug |
| CN112576219A (en) * | 2020-12-04 | 2021-03-30 | 中石化石油工程技术服务有限公司 | Rubber-cylinder-free fully-soluble bridge plug, setting connection tool thereof and use method |
| CN112576220A (en) * | 2020-12-04 | 2021-03-30 | 中石化石油工程技术服务有限公司 | Large-drift-diameter expansion type fully-soluble bridge plug, setting connection tool thereof and use method |
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