CN109236229A - A kind of mixing bridge plug - Google Patents
A kind of mixing bridge plug Download PDFInfo
- Publication number
- CN109236229A CN109236229A CN201811173376.7A CN201811173376A CN109236229A CN 109236229 A CN109236229 A CN 109236229A CN 201811173376 A CN201811173376 A CN 201811173376A CN 109236229 A CN109236229 A CN 109236229A
- Authority
- CN
- China
- Prior art keywords
- mandrel
- bridge plug
- connector
- mixing bridge
- plug according
- 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.)
- Granted
Links
- 241000239290 Araneae Species 0.000 claims abstract description 24
- 238000012856 packing Methods 0.000 claims abstract description 18
- 239000002195 soluble material Substances 0.000 claims abstract description 15
- 239000002131 composite material Substances 0.000 claims description 11
- 241001074085 Scophthalmus aquosus Species 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 11
- 239000007788 liquid Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000009466 transformation Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229920000954 Polyglycolide Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002198 insoluble material Substances 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 239000004633 polyglycolic acid Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 240000005546 Piper methysticum Species 0.000 description 1
- 235000016787 Piper methysticum Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000004503 fine granule Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 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
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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)
- Earth Drilling (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The present invention relates to a kind of mixing bridge plugs, for temporary plugging oil gas pit shaft, including mandrel and packing element, packing element is slidably located on the outer surface medium position of mandrel, one end that the outer surface of mandrel is located at packing element is successively arranged with the first cone sleeve and the first slip spider position limiting structure, and one end of mandrel is provided with the first connector；The other end that the outer surface of mandrel is located at packing element is successively arranged with the second cone sleeve and throw-out collar, and the other end of mandrel is provided with the second connector；Mandrel includes the first mandrel and the second mandrel, and the second mandrel is abutted with the first connector, and the length of the second mandrel is less than or equal to the setting stroke of mixing bridge plug, and the second mandrel and the first connector are made for soluble material.Before oil/gas well production, after bridge plug brills whole in pit shaft are removed, the second mandrel and the first connector will be dissolved directly, almost without residue in shaft bottom.
Description
Technical field
The present invention relates to be segmented a kind of downhole tool technology that transformation temporary plug casing inner diameter is used in well fracturing
Field, especially a kind of mixing bridge plug.
Background technique
In the transformation operation of oil/gas well staged fracturing, it will usually use the work of composite bridge plug or cast iron bridge plug as segmentation
Tool.Both bridge plugs are each advantageous, such as composite bridge plug, have the characteristics that brill mill is fireballing, must after fracturing work terminates
These composite bridge plugs must be ground off by coiled tubing quick drill, form the wellbore of full-bore.
For traditional bridge plug, the both ends of bridge plug are provided with the first connector and the second connector, connect in the first connector and second
It is provided with intermeshing structure on head, in oil/gas well in the brill mill of multiple bridge plugs, the first connector of a upper bridge plug can fall off
To the second connector of next bridge plug；Due to being intermeshed structure, it is ensured that the first connector of a upper bridge plug bores mill by complete
Fall；But for the last one bridge plug in oil/gas well, the first connector or directly drops to oil/gas well bottom and remain in shaft bottom.
Meanwhile after the slips of bridge plug is drilled grind, the mandrel of bridge plug loses the limit of slips, and back segment mandrel can also take off
Drop down onto shaft bottom.
Above-mentioned the first connector and back segment mandrel remains in shaft bottom, seriously affects oil/gas well production.
Summary of the invention
The present invention provides a kind of mixing bridge plug, has a large amount of residues in shaft bottom in transformation process to solve existing bridge plug
Technical problem.
In order to solve the above technical problem, the present invention provides a kind of mixing bridge plugs, are used for temporary plugging oil gas pit shaft, including
Hollow mandrel and packing element, the packing element are slidably located on the outer surface medium position of the mandrel, the appearance of the mandrel
One end that face is located at the packing element is successively arranged with the first cone sleeve and the first slip spider position limiting structure, one end of the mandrel
It is arranged with the first connector；The other end that the outer surface of the mandrel is located at the packing element is successively arranged with the second cone sleeve and pushes away
Ring, the other end of the mandrel are arranged with the second connector；The mandrel, the first cone sleeve, first slip spider limit
Bit architecture, the throw-out collar, the second cone sleeve, first connector and second connector be all composite material production and
At；The mandrel includes the first mandrel and the second mandrel mutually abutted, and second mandrel is abutted with first connector, when
When the mixing bridge plug completes setting, the length that second mandrel is located at outside second mandrel of the slips be less than or
Equal to the setting stroke of the mixing bridge plug, second mandrel and first connector are made for soluble material.
The beneficial effects of the present invention are: setting two-part structure for bridge plug, the length of second mandrel is less than or waits
In the setting stroke of the mixing bridge plug；That is, second mandrel is located at except slip travel, is exactly after the completion of setting
Second mandrel exposes except slips.Simultaneously as second mandrel and first connector are made for soluble material, this
Sample is before oil/gas well needs to produce, and brill grinds off all bridge plugs in pit shaft, and the second mandrel and first connector will be directly molten
It takes off, almost without residue in shaft bottom.Further more, bridge plug is set as two-part structure, the length of second mandrel be less than or
Equal to the setting stroke of the mixing bridge plug；In the setting completion of bridge plug, the chucking power of slips is acted on the first mandrel,
Since the first mandrel is insoluble material, it is ensured that the reliability of bridge plug.
Further, the length of first connector is between the 1/5 to 1/6 of the mandrel length.
Beneficial effect using above-mentioned further scheme is: conventional bridge plug due to being engaged between two connectors to match,
Provided with engaging structure, entire first joint length can reach the 1/4 to 1/5 of mandrel length, and bridge plug is more heavy.Using solvable
First connector of material, hardness is higher, does not need the very long intensity requirement that can reach bridge plug of setting, reduces bridge plug
Weight and length improve the convenience of bridge plug.
Further, the second slip spider position limiting structure is arranged on the mandrel, the second slip spider position limiting structure is located at
Between the second cone sleeve and the throw-out collar；It is provided on second slip spider position limiting structure and the first slip spider position limiting structure
Limit slips.
Beneficial effect using above-mentioned further scheme is: simple using double limit kava structures, limit is reliable, stablizes.
Further, ring of giving up is provided in first connector, the ring of giving up is connect with first joint screw thread.
Beneficial effect using above-mentioned further scheme is: by the way that ring of giving up is separately provided, convenient for the setting operation of bridge plug,
Improve setting reliability.
Into one, the ring of giving up is made for soluble material.
Using the beneficial effect of above-mentioned further scheme is: giving up ring also as solvable material, further ensures that bridge plug component not
It can remain in shaft bottom.
Further, second mandrel is radially provided with through-hole.
Beneficial effect using above-mentioned further scheme is: product in actual use, have multiple bridge plugs together
It uses, in pressing crack construction process, one end of the mandrel in bridge plug can seal mandrel internal diameter by ball sealer, and when row of returning works as lower part
The ball sealer of bridge plug returns when be discharged to the bridge plug setting position, and ball sealer can be contacted with lower contact pipe nipple bottom, but not stifled
Through-hole is filled in, well liquid still has flow channel when the row of returning.
Further, the by-pass prot is multiple.
Beneficial effect using above-mentioned further scheme is: multiple through-holes avoid one of hole plug and influence well
Liquid returns row.
Further, multiple through-holes are evenly arranged in the circumferential direction of second mandrel.
Beneficial effect using above-mentioned further scheme is: being uniformly arranged for through-hole ensures to flow in bridge plug surrounding liquid
Smoothness.
Further, the end of first connector is planar structure.
Beneficial effect using above-mentioned further scheme is: conventional bridge plug due to being engaged between two connectors to match,
Provided with engaging structure.Setting engaging structure is not had to using the first connector of soluble material, reduces the weight and length of bridge plug,
Improve the convenience of bridge plug.
Further, the outer surface roughness Ra of first mandrel is less than 6.3.
Beneficial effect using above-mentioned further scheme is: using soluble material the first connector surface flatness compared with
Height, coefficient of friction is smaller, and setting procedure is more convenient.
Further, the other end of second connector is provided with interlocking structure.
Beneficial effect using above-mentioned further scheme is: the other end of the second connector is provided with interlocking structure, convenient for and
Conventional bridge plug matching, realization are integrally adapted to and are used with conventional bridge plug, improve the use scope and versatility of product.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of the embodiment of the present invention,
Fig. 2 is the schematic diagram of the section structure after the embodiment of the present invention is setting,
In attached drawing, parts list represented by the reference numerals are as follows:
1, the second connector, 2, mandrel, the 21, first mandrel, the 22, second mandrel, 3, throw-out collar, the 4, second slip spider limit knot
Structure, 5, limit slips, the 6, second cone sleeve, 7, packing element, the 8, first cone sleeve, the 9, first slip spider position limiting structure, 10, the
One connector, 11, ring of giving up, 12, interlocking structure, 13, oil gas pit shaft, 14, pressure break ball
Specific embodiment
The present invention is further illustrated with embodiment with reference to the accompanying drawing.
The diagrammatic cross-section of the mixing bridge plug of one embodiment of the present of invention is used for temporary plugging oil gas pit shaft referring to Fig. 1,
Including hollow mandrel 2 and packing element 7, packing element 7 is slidably located on the outer surface medium position of mandrel 2, the outer surface position of mandrel 2
It is successively arranged with the first cone sleeve 8 and the first slip spider position limiting structure 9 in one end of packing element 7, one end of mandrel 2 is arranged with
One connector 10；The other end that the outer surface of mandrel 2 is located at packing element 7 is successively arranged with the second cone sleeve 6 and throw-out collar 3, mandrel 2
The other end is arranged with the second connector 1；Mandrel 2, the first cone sleeve 8, the first slip spider position limiting structure 9, throw-out collar 3, the second cone
Sleeve 6, the first connector 10 and the second connector 1 are all made for composite material；Mandrel 2 includes the first mandrel 21 mutually abutted
With the second mandrel 22, the second mandrel 22 is abutted with the first connector 10, and the length of the second mandrel 22 is less than or equal to mixing bridge plug
Setting stroke, when mixing bridge plug completes setting, the second mandrel 22 is located at the outside of slips 9.Second mandrel 22 and the first connector
10 are made for soluble material.The second slip spider position limiting structure 4 is arranged on mandrel 2, the second slip spider position limiting structure 4 is located at
Between second cone sleeve 6 and throw-out collar 3；Limit is provided on second slip spider position limiting structure 4 and the first slip spider position limiting structure 9
Slips 5.
Composite material refers in the present embodiment: fibrous composite, interlayer composite material, and fine granule composite materials mix
The common material in the art such as composite material.
Soluble material refers in the present embodiment: solvable magnesium alloy, and polyglycolic acid (PGA) etc. is normal in the art
Material.
The working principle of the bridge plug are as follows: mixing bridge plug cooperation, which is set after adapter is connect with setting tool together, enters well,
It sets adapter and is adapted to connection with ring of giving up, after reaching design setting depth, so that it is generated one by triggering setting tool
Fixed thrust pushes throw-out collar 3 to move down, and packing element 7 will be squeezed and generate elastic deformation and contact shape with internal surface of sleeve pipe
At initial sealing；After thrust is greater than the bursting force of the first, second slip spider position limiting structure 4, slip spider position limiting structure will
Rupture, and moved along the conical surface of the first, second cone sleeve 6, until limit slips 5 is closely anchored with oil gas shaft in wall；
When the thrust that setting tool provides continues to increase, until setting, giving up greater than after setting the shear pin shearing force of adapter
Ring falls off with adapter is set, and bridge plug stays in design setting depth, then completes perforating job and recycles setting tool, in well head
Put into the solvable pressure break ball of correspondingly-sized.The mandrel 2 of mixing bridge plug can be fallen under the effect of gravity in the solvable pressure break ball of straight well section
On the ball seat at top, the ball at 2 top of mixing bridge plug mandrel can be fallen on by injecting the solvable pressure break ball of liquid-driving in net horizontal section
On seat.After pressure break ball is fallen on ball seat, ball can be realized by continuing through pressure break pump truck pump note fracturing liquid to ball application pressure
With the sealing of ball seat, then these fracturing liquids can enter stratum by the preforation tunnel on casing, start fracturing stratum, when setting
Meter proppant total amount is all pumped into stratum, then completes pressing crack construction, steps be repeated alternatively until that all layers of position transformation terminate.
In bridge plug technology field, setting stroke is exactly the slips distance mobile relative to mandrel, that is, slips movement
Afterwards, mandrel exposes the length of slips.
Mixing bridge plug in the present embodiment is located on the last one position of entire underground, after the completion of setting, second
Mandrel is located at except slip travel, as shown in Figure 2；Bridge plug, which stays in, designs setting depth in oil gas pit shaft 13, then complete perforation
Operation simultaneously recycles setting tool, in the solvable pressure break ball 14 of well head investment correspondingly-sized, then pushes mandrel mobile, so that second
Mandrel 22 is fully located at except the first slip spider position limiting structure 9.Simultaneously as the second mandrel 22 and the first connector 10 are solvable material
Material is made, and in this way when oil/gas well needs secondary transformation, the second mandrel 22 and the first connector will be dissolved directly,
Almost without residue in shaft bottom.Further more, bridge plug is set as two-part structure, the length of the second mandrel 22 is less than or equal to mixing
The setting stroke of bridge plug；In the setting completion of bridge plug, the chucking power of slips is acted on the first mandrel, due to the first mandrel
It is insoluble material, it is ensured that the reliability of bridge plug.
In the present embodiment, the length of the first connector 10 is the 1/5 of 2 length of mandrel.
Conventional bridge plug is provided with engaging structure, entire first joint length due to engaging between two connectors to match
The 1/4 to 1/5 of mandrel length can be reached, bridge plug is more heavy.Using the first connector of soluble material, hardness is higher, is not required to
The very long intensity requirement that can reach bridge plug is set, reduces the weight and length of bridge plug, improves the convenience of bridge plug.
In the present embodiment, ring 11 of giving up is made for soluble material；Ring of giving up in this way can be also dissolved, bridge plug portion
Part will not remain in shaft bottom.
In the present embodiment, the second mandrel 22 is radially provided with multiple through-holes, and multiple through-holes are evenly arranged on the second mandrel
In 22 circumferential direction.
Product in actual use, have multiple bridge plugs and be used together, the mandrel in pressing crack construction process, in bridge plug
One end can seal mandrel internal diameter by ball sealer, be discharged to the bridge plug setting position when the ball sealer of lower part bridge plug returns when the row of returning
When, ball sealer can be contacted with lower contact pipe nipple bottom, but not block through-hole, and well liquid still has flow channel when the row of returning；
Through-hole is uniformly arranged the smoothness for ensuring to flow in bridge plug surrounding liquid.Simultaneously as the second mandrel is soluble material, setting
Multiple through-holes improve the contact area of underground slurries also the second mandrel, improve the solution rate of the second mandrel.
In the present embodiment, the end of the first connector 10 is planar structure.
Conventional bridge plug is provided with engaging structure due to engaging between two connectors to match.Using the of soluble material
One connector does not have to setting engaging structure, reduces the weight and length of bridge plug, improves the convenience of bridge plug.
The outer surface roughness Ra of first mandrel 21 is 3.2.
Surface flatness using the first connector of soluble material is higher, and coefficient of friction is smaller, and setting procedure is more convenient.
In the present embodiment, the other end of the second connector 1 is provided with interlocking structure 12.
The other end of second connector 1 is provided with interlocking structure, convenient for matching with conventional bridge plug, realizes whole with conventional bridge plug
Adaptation and use, improve the use scope and versatility of product.
In the description of the present invention, it is to be understood that, term " center ", " length ", " width ", "upper", "lower", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner" is that orientation based on the figure or position are closed
System, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have
Specific orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be direct phase
Even, can also indirectly connected through an intermediary, the interaction that can be connection or two elements inside two elements is closed
System.For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood as the case may be
Meaning.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Mixing bridge plug of the invention is described in detail above, specific case used herein is to original of the invention
Reason and embodiment are expounded.The above description of the embodiments is only for helping to understand the core idea of the present invention；Meanwhile
For those of ordinary skill in the art, according to the thought of the present invention, has change in specific embodiments and applications
Become place, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of mixing bridge plug is used for temporary plugging oil gas pit shaft, which is characterized in that including hollow mandrel (2) and packing element
(7), the packing element (7) is slidably located on the outer surface medium position of the mandrel (2), the outer surface position of the mandrel (2)
The first cone sleeve (8) and the first slip spider position limiting structure (9), the mandrel are successively arranged in one end of the packing element (7)
(2) one end is arranged with the first connector (10)；The other end that the outer surface of the mandrel (2) is located at the packing element (7) successively covers
Equipped with the second cone sleeve (6) and throw-out collar (3), the other end of the mandrel (2) is arranged with the second connector (1)；The mandrel
(2), the first cone sleeve (8), the first slip spider position limiting structure (9), the throw-out collar (3), the second cone set
Cylinder (6), first connector (10) and second connector (1) are all made for composite material；The mandrel (2) includes phase
The first mandrel (21) and the second mandrel (22) mutually abutted, second mandrel (22) abut with first connector (10), institute
The length for stating the second mandrel (22) is less than or equal to the setting stroke of the mixing bridge plug, when mixing bridge plug completion is setting
When, second mandrel (22) is located at the outside of the slips (9), and second mandrel (22) and first connector (10) are
Soluble material is made.
2. mixing bridge plug according to claim 1, which is characterized in that the length of first connector (10) is the mandrel
(2) between the 1/5 to 1/6 of length.
3. mixing bridge plug according to claim 1 or 2, which is characterized in that be arranged with the second slip spider on the mandrel (2)
Position limiting structure (4), the second slip spider position limiting structure (4) be located at the second cone sleeve (6) and the throw-out collar (3) it
Between；Limit slips (5) is provided on second slip spider position limiting structure (4) and the first slip spider position limiting structure (9).
4. mixing bridge plug according to claim 3, which is characterized in that be provided with ring of giving up in first connector (10)
(11), the ring of giving up (11) is threadedly coupled with first connector (10).
5. mixing bridge plug according to claim 4, which is characterized in that the ring of giving up (11) be soluble material make and
At.
6. mixing bridge plug according to claim 1 or 2, which is characterized in that the radially setting of second mandrel (22)
There is through-hole.
7. mixing bridge plug according to claim 6, which is characterized in that the through-hole is multiple.
8. mixing bridge plug according to claim 7, which is characterized in that multiple through-holes are evenly arranged on second mandrel
(22) in circumferential direction.
9. mixing bridge plug according to claim 1 or 2, which is characterized in that the end of first connector (10) is plane
Structure.
10. mixing bridge plug according to claim 1 or 2, which is characterized in that the outer surface of first mandrel (21) is coarse
Ra is spent less than 6.3.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811173376.7A CN109236229B (en) | 2018-10-09 | 2018-10-09 | Mixed bridge plug |
| PCT/CN2018/110680 WO2020073349A1 (en) | 2018-10-09 | 2018-10-17 | Mixture bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811173376.7A CN109236229B (en) | 2018-10-09 | 2018-10-09 | Mixed bridge plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109236229A true CN109236229A (en) | 2019-01-18 |
| CN109236229B CN109236229B (en) | 2019-12-27 |
Family
ID=65055139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811173376.7A Active CN109236229B (en) | 2018-10-09 | 2018-10-09 | Mixed bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109236229B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109822792A (en) * | 2019-04-02 | 2019-05-31 | 阔丹凌云汽车胶管有限公司 | Rubber special pipe tube drawing tool |
| CN111779465A (en) * | 2020-04-22 | 2020-10-16 | 中国石油天然气股份有限公司 | Soluble fracturing ball seat |
| CN112576231A (en) * | 2021-02-24 | 2021-03-30 | 四川省威沃敦化工有限公司 | All-metal soluble fracturing sectionalizer |
| CN116122766A (en) * | 2021-11-15 | 2023-05-16 | 中国石油天然气集团有限公司 | Quick-release type soluble bridge plug |
| CN118346224A (en) * | 2024-04-30 | 2024-07-16 | 盐城市鑫源石化机械有限公司 | Anti-drop's soluble bridging plug |
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| CN206987777U (en) * | 2017-07-26 | 2018-02-09 | 成都维泰油气能源技术有限公司 | A kind of solvable bridging plug |
| CN108533214A (en) * | 2018-04-10 | 2018-09-14 | 重庆地质矿产研究院 | Degradable alloy and application thereof as single slip type soluble bridge plug |
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