CN113123753A - Soluble easy-to-drill open hole packer and using method thereof - Google Patents
Soluble easy-to-drill open hole packer and using method thereof Download PDFInfo
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- CN113123753A CN113123753A CN201911407152.2A CN201911407152A CN113123753A CN 113123753 A CN113123753 A CN 113123753A CN 201911407152 A CN201911407152 A CN 201911407152A CN 113123753 A CN113123753 A CN 113123753A
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- mandrel
- open hole
- packer
- hole packer
- rubber cylinder
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005553 drilling Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000004873 anchoring Methods 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 238000004073 vulcanization Methods 0.000 claims 2
- 238000007789 sealing Methods 0.000 abstract description 12
- 239000002253 acid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002343 natural gas well Substances 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000576 Laminated steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- 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
-
- 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
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
- E21B33/1265—Packers; Plugs with fluid-pressure-operated elastic cup or skirt with mechanical slips
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)
Abstract
The invention aims to provide a soluble easy-drilling open hole packer and a using method thereof, which improve the working state of the packer in a complex environment, are not easy to damage and have high sealing reliability, and solve the technical problems of low sealing reliability, high sealing losing probability, poor unsealing property and the like of the existing open hole packer in a high-temperature and high-pressure environment; a soluble, easy-to-drill open hole packer comprising: the device comprises a mandrel, an upper joint, a lower joint and an elastic rubber cylinder; the mandrel is structurally a stepped cylindrical tube with the middle outer diameter larger than the outer diameters of the two ends, a channel communicated with the inside and the outside is arranged in the middle to serve as a pressure transmission hole, the upper portion of the mandrel is connected with the inner hole of the upper connector through threads, the lower portion of the mandrel is connected with the inner hole of the lower connector through threads, and the elastic rubber cylinder is located outside the mandrel.
Description
Technical Field
The invention relates to the field of petroleum and natural gas well completion and oil extraction, in particular to a soluble easy-drilling open hole packer and a using method thereof.
Background
Along with the rolling external expansion of oil field development, the grade of a reservoir gradually becomes poor, the benefit of the general transformation and development of a vertical well and a horizontal well becomes poor, and the single-well productivity of part of wells needs to be improved through a layered fracturing technology. The open hole layered acid fracturing is used as a mature technology and is one of important yield increasing measures for carbonate reservoir development, effective packing between layers is realized by putting an open hole packer in an open hole section, and fixed-point fracturing is carried out on a dominant reservoir displayed by logging, wherein the fracturing mode can make a contribution to improving the flow conductivity of the reservoir, increasing the yield of a production well or the injection amount of an injection well. The open hole layered acid fracturing generally adopts a seal-up and press-down mode, and the common open hole packer mainly adopts a compression packer, an oil/water self-expansion packer, an expansion open hole packer and the like.
The conventional open hole packer has poor high temperature resistance and corrosion resistance, and the arrangement of the process pipe column does not pay attention to the anchoring of the open hole packer, so that the probability of acid fracturing and sealing losing in a complex well is high.
In addition, due to the reasons that mudstone at the open hole section of the carbonate reservoir is exposed, the production differential pressure is improperly controlled and the like, abnormal conditions such as open hole collapse, underground falling objects and the like exist in the production process, the packer deblocking reliability in the later period is low, the well completion pipe string cannot be lifted, and only fishing or milling can be carried out after releasing the packer. Because the conventional open hole packer is generally made of carbon steel, the milling difficulty is high. Therefore, in the technical field of oil and natural gas exploitation, a well completion open hole packer which can resist high temperature and high pressure, adapt to severe underground environment and is convenient to set and unseal is urgently needed. The technical requirements of pressure bearing in the acid fracturing stage and easy unsealing in the later stage are met.
201420822483.9 discloses an expanding anchoring packer rubber cylinder, which is provided with lining metal parts at two ends of the rubber cylinder, external threads are arranged on the outer circumference of the outer end part of the metal part, an annular anchor sheet is arranged in the middle of the rubber cylinder, anchor teeth are arranged on the anchor sheet, and the expanding anchoring packer rubber cylinder is anchored when being set through the rubber cylinder and is recovered when being unsealed. However, the packer still does not solve the problem that the steel sheets of the packer are hard to bend under the pressure-bearing state, and only the anchoring capability of the packer is improved.
201320644364.4 discloses an expanding packer, which is a small-diameter expanding fracturing packer, and adopts three-layer structure of inner rubber cylinder, laminated steel sheet and outer rubber cylinder, although the high temperature resistance is improved, the problem of insufficient anchoring force and low unsealing reliability is not solved fundamentally.
US 8474524 discloses a packer, which is referred to as a packer to improve the outburst prevention performance of the packer mainly from the aspect of rubber bonding, and does not fundamentally solve the problems of insufficient anchoring force and low unsealing reliability.
Therefore, the open hole packer which does not need to be specially unpacked to operate a lifting pipe column is provided for the field of petroleum and natural gas well completion and oil production in a targeted manner, and the technical problem to be solved is urgent.
Disclosure of Invention
The invention aims to provide a soluble easy-drilling open hole packer and a using method thereof, which improve the working state of the packer in a complex environment, are not easy to damage and have high sealing reliability, and solve the technical problems of low sealing reliability, high sealing losing probability, poor unsealing property and the like of the existing open hole packer in a high-temperature and high-pressure environment.
In order to achieve the purpose, the solution of the invention is to provide a soluble easy-to-drill open hole packer, which comprises: the device comprises a mandrel, an upper joint, a lower joint and an elastic rubber cylinder; the mandrel is structurally a stepped cylindrical tube with the middle outer diameter larger than the outer diameters of the two ends, an internally and externally communicated channel is arranged in the middle of the mandrel to serve as a pressure transmission hole, the upper part of the mandrel is connected with the inner hole of the upper connector through threads, the lower part of the mandrel is connected with the inner hole of the lower connector through threads, and the elastic rubber cylinder is positioned outside the mandrel;
connecting sleeves are respectively arranged at two ends of the mandrel, the upper end of the connecting sleeve positioned at the upper end of the mandrel is fixedly connected with the upper joint through threads and sleeved on the mandrel, and the connecting sleeve positioned at the lower end of the mandrel is sleeved on the mandrel through a deblocking sleeve;
and two ends of the elastic rubber cylinder are respectively provided with an end ring, the end ring positioned at the upper part of the elastic rubber cylinder is connected with the connecting sleeve positioned at the upper part of the mandrel, the end ring positioned at the lower part of the elastic rubber cylinder is connected with the sleeve opening positioned at the lower part of the mandrel, and the elastic rubber cylinder is wedged and fixed in the end ring through two support rings.
Furthermore, the elastic sleeve comprises a deformation layer, a supporting layer and a contact layer which are sequentially sleeved from inside to outside, wherein the deformation layer and the contact layer are made of elastic materials, and the supporting layer is made of metal materials.
Furthermore, a protective bowl is sleeved in the end ring.
Furthermore, the geometric shape of the protective bowl is horn-shaped, and the outer wall of the protective bowl is provided with a toothed slip structure which can expand along with the steel sheet and the rubber cylinder and is wedged into the stratum after being expanded, so that the anchoring effect is achieved.
Furthermore, two ends of the elastic rubber cylinder are respectively vulcanized into an upper vulcanizing head and a lower vulcanizing head.
Further, the deformation layer and the contact layer are made of a dissolvable rubber material.
Furthermore, the supporting layer is composed of an alloy framework, and the alloy framework comprises a plurality of layers of overlapped metal sheets which are arranged in an involute shape.
Furthermore, the mandrel structure is made of an easily-drilled and-ground alloy material.
Further, a use method of the soluble easy-to-drill open hole packer comprises the following steps:
when the seat is sealed, the mandrel is internally pressurized, liquid enters the pressure transfer hole, the deformation layer is expanded under the action of hydraulic pressure, the support layer drives the contact layer to expand to a certain degree to be attached to the well wall, the internal pressure of the deformation layer is increased along with the increase of the liquid entering the pressure transfer hole, and finally the protective bowl is opened to finish the whole seat sealing action;
when the elastic sleeve is unsealed, only the pumping of the pressure in the mandrel is needed to be stopped and the pressure is released, and the deformation layer naturally contracts under the action of rubber elasticity, so that the unsealing of the whole elastic sleeve is realized;
the invention has the advantages that:
1. according to the invention, the flexible steel bowl in a bell mouth shape is added in a form of realizing contact sealing after expansion of the rubber sleeve, so that the problems of insufficient anchoring force and hard bending under the pressure bearing effect of the steel sheet layer after expansion sealing of the packer are solved, the rubber sleeve has high pressure bearing and deformation resistance after being seated and sealed through transition protection of the flexible steel bowl, and the pressure difference resistance of the packer under the high-temperature and high-pressure working condition is improved;
2. when the rubber sleeve is unsealed, the rubber sleeve can be naturally contracted, the sealing failure phenomenon caused by the damage of the shoulder part of the rubber sleeve is avoided, and the safety and the reliability in the testing, fracturing and other processes are improved.
Drawings
FIG. 1 is a schematic illustration of a soluble free-drilling open hole packer provided by the present invention;
as shown in the figure, the device comprises a 1-upper joint, a 2-connecting sleeve, a 3-mandrel, a 4-end ring, a 5-protecting bowl, a 6-deformation layer, a 7-supporting layer, an 8-contact layer, a 9-unsealing sleeve, a 10-supporting ring, a 11-lower joint and an a-pressure transmission hole.
Examples
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1, a soluble, easy-to-drill open hole packer comprises: the device comprises a mandrel 3, an upper joint 1, a lower joint 11 and an elastic rubber cylinder; the mandrel 3 is a stepped cylindrical tube with the middle outer diameter larger than the outer diameters of the two ends, a channel communicated with the inside and the outside is arranged in the middle to serve as a pressure transmission hole a, the upper portion of the mandrel 3 is connected with the inner hole of the upper connector 1 through threads, the lower portion of the mandrel 3 is connected with the inner hole of the lower connector 11 through threads, and the elastic rubber cylinder is located outside the mandrel 3.
The two ends of the mandrel 3 are respectively provided with a connecting sleeve 2, the upper end of the connecting sleeve 2 positioned at the upper end of the mandrel 3 is fixedly connected with the upper joint 1 through threads and sleeved on the mandrel 3, and the connecting sleeve 2 positioned at the lower end of the mandrel 3 is sleeved on the mandrel 3 through an unsealing sleeve 9.
Two ends of the elastic rubber cylinder are respectively provided with an end ring 4, the end ring 4 positioned at the upper part of the elastic rubber cylinder is connected with a connecting sleeve 2 positioned at the upper part of the mandrel 3, the end ring 4 positioned at the lower part of the elastic rubber cylinder is connected with an unpacking sleeve 9 positioned at the lower part of the mandrel 3, and the elastic rubber cylinder is wedged and fixed in the end ring 4 through two support rings 10; the elastic sleeve part comprises a deformation layer 6, a supporting layer 7 and a contact layer 8 which are sequentially sleeved from inside to outside, wherein the deformation layer 6 and the contact layer 8 are made of a soluble rubber material, the supporting layer 7 is composed of an alloy framework, and the alloy framework comprises a plurality of layers of overlapped metal sheets and is arranged in an involute shape; and two ends of the elastic rubber cylinder are respectively vulcanized into an upper vulcanizing head and a lower vulcanizing head.
The end ring 4 is internally sleeved with a protective bowl 5, the protective bowl 5 is horn-shaped, and the outer wall of the protective bowl is provided with a toothed slip structure which can expand along with the steel sheet and the rubber cylinder and is wedged into the ground after being expanded, so that the anchoring effect is achieved.
A use method of the soluble easy-to-drill open hole packer comprises the following steps:
suppress in the dabber 3, liquid gets into and passes pressure hole a, and hydraulic pressure force effect makes the 6 inflation of deformation layer, and the 6 inflation of deformation layer makes the alloy skeleton drive contact layer 8 inflation, expands to the certain degree and just laminates with the wall of a well, and along with passing the liquid that pressure hole a got into and increasing, the 6 internal pressure in deformation layer also increases thereupon, finally struts the protective bowl 5, accomplishes the action of whole seat sealing.
During the deblocking, only need stop the pump notes of intraductal pressure to the pressure release, deformation layer 6 returns the natural shrinkage under the elastic effect of rubber, realizes whole elastic sleeve's deblocking.
If the later-stage deblocking of the packer is difficult due to the collapse of the well wall, the falling objects in the well and other reasons, the whole structure of the packer is made of an easily drilling and grinding alloy material, and a milling shoe or a drill bit can be put into the packer for drilling and grinding operation without overhaul construction.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Claims (9)
1. A soluble, easy-to-drill open hole packer, comprising: the device comprises a mandrel (3), an upper joint (1), a lower joint (11) and an elastic rubber cylinder; the mandrel (3) is structurally a stepped cylindrical tube with the middle outer diameter larger than the outer diameters of two ends, an internally and externally communicated channel is arranged in the middle to serve as a pressure transmission hole (a), the upper part of the mandrel (3) is connected with an inner hole of the upper joint (1) through threads, the lower part of the mandrel (3) is connected with an inner hole of the lower joint (11) through threads, and the elastic rubber tube is positioned outside the mandrel (3);
two ends of the mandrel (3) are respectively provided with a connecting sleeve (2), the upper end of the connecting sleeve (2) positioned at the upper end of the mandrel (3) is fixedly connected with the upper joint (1) through threads and sleeved on the mandrel (3), and the connecting sleeve (2) positioned at the lower end of the mandrel (3) is sleeved on the mandrel (3) through an unsealing sleeve (9);
two ends of the elastic rubber cylinder are respectively provided with an end ring (4), the end ring (4) positioned at the upper part of the elastic rubber cylinder is connected with a connecting sleeve (2) positioned at the upper part of the mandrel (3), the end ring (4) positioned at the lower part of the elastic rubber cylinder is connected with an unpacking sleeve (9) positioned at the lower part of the mandrel (3), and the elastic rubber cylinder is wedged and fixed in the end ring (4) through two support rings (10).
2. The soluble easy-drilling open hole packer as claimed in claim 1, wherein the elastic sleeve comprises a deformation layer (6), a support layer (7) and a contact layer (8) which are sequentially sleeved from inside to outside, the deformation layer (6) and the contact layer (8) are made of elastic materials, and the support layer (7) is made of metal materials.
3. The soluble free-drilling open hole packer as claimed in claim 1, characterized in that the end ring (4) is internally sleeved with a retaining bowl (5).
4. The soluble easy-drilling open hole packer as claimed in claim 3, wherein the geometry of the retaining bowl (5) is trumpet-shaped, and the outer wall of the retaining bowl is provided with a toothed slip structure which can expand together with the steel sheet and the rubber cylinder and then be wedged into the stratum after expansion to play a role in anchoring.
5. The soluble free-drilling open hole packer of claim 1, wherein both ends of the elastomeric sleeve are vulcanized into an upper vulcanization head and a lower vulcanization head, respectively.
6. The dissolvable free-drilling open hole packer according to claim 2, wherein the deformation layer (6) and contact layer (8) are made of a dissolvable rubber material.
7. The soluble free-drilling open hole packer as claimed in claim 2, characterized in that the support layer (7) consists of an alloy skeleton comprising a plurality of overlapping metal sheets in an involute arrangement.
8. The soluble free-drilling open hole packer as claimed in claim 1, characterized in that the mandrel (3) structure is made of a free-drilling and wear alloy material.
9. A method of using the dissolvable free-drilling open hole packer according to claims 1-8, wherein:
when the seat seal is carried out, the mandrel (3) is internally pressurized, liquid enters the pressure transfer hole (a), the deformation layer (6) is expanded under the action of hydraulic pressure, the deformation layer (6) is expanded to enable the supporting layer (7) to drive the contact layer (8) to expand, the expansion is carried out to a certain degree, the deformation layer is attached to the well wall, the internal pressure of the deformation layer (6) is increased along with the increase of the liquid entering the pressure transfer hole (a), and finally the protective bowl (5) is expanded to complete the whole seat seal action;
when deblocking, only need stop the pump notes and the pressure release of dabber (3) internal pressure, deformation layer (6) return the natural shrinkage under the effect of rubber elasticity, realize whole elastic sleeve's deblocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911407152.2A CN113123753A (en) | 2019-12-31 | 2019-12-31 | Soluble easy-to-drill open hole packer and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911407152.2A CN113123753A (en) | 2019-12-31 | 2019-12-31 | Soluble easy-to-drill open hole packer and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113123753A true CN113123753A (en) | 2021-07-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911407152.2A Pending CN113123753A (en) | 2019-12-31 | 2019-12-31 | Soluble easy-to-drill open hole packer and using method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN113123753A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756776A (en) * | 2021-09-27 | 2021-12-07 | 中煤科工集团重庆研究院有限公司 | Large-inclination-angle multi-media component pipe column system for segmented fracturing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009150461A1 (en) * | 2008-06-12 | 2009-12-17 | Flotech Holdings Limited | Hole packer and seal |
| US20120217010A1 (en) * | 2009-11-20 | 2012-08-30 | Exxonmobil Upstream Research Company | Open-Hole Packer For Alternate Path Gravel Packing, and Method For Completing An Open-Hole Wellbore |
| CN103184848A (en) * | 2011-12-29 | 2013-07-03 | 安东石油技术（集团）有限公司 | Hydraulic seat seal permanent open hole packer and open hole well-completion packing method |
| CN103670326A (en) * | 2013-12-31 | 2014-03-26 | 安东石油技术（集团）有限公司 | Naked eye packer |
| CN104847301A (en) * | 2015-04-28 | 2015-08-19 | 中国石油天然气股份有限公司 | Open hole packer |
| CN206376808U (en) * | 2016-12-12 | 2017-08-04 | 中国石油天然气股份有限公司 | Completion open hole packer |
-
2019
- 2019-12-31 CN CN201911407152.2A patent/CN113123753A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009150461A1 (en) * | 2008-06-12 | 2009-12-17 | Flotech Holdings Limited | Hole packer and seal |
| US20120217010A1 (en) * | 2009-11-20 | 2012-08-30 | Exxonmobil Upstream Research Company | Open-Hole Packer For Alternate Path Gravel Packing, and Method For Completing An Open-Hole Wellbore |
| CN103184848A (en) * | 2011-12-29 | 2013-07-03 | 安东石油技术（集团）有限公司 | Hydraulic seat seal permanent open hole packer and open hole well-completion packing method |
| CN103670326A (en) * | 2013-12-31 | 2014-03-26 | 安东石油技术（集团）有限公司 | Naked eye packer |
| CN104847301A (en) * | 2015-04-28 | 2015-08-19 | 中国石油天然气股份有限公司 | Open hole packer |
| CN206376808U (en) * | 2016-12-12 | 2017-08-04 | 中国石油天然气股份有限公司 | Completion open hole packer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756776A (en) * | 2021-09-27 | 2021-12-07 | 中煤科工集团重庆研究院有限公司 | Large-inclination-angle multi-media component pipe column system for segmented fracturing |
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Application publication date: 20210716 |