CN220101247U - Well completion structure with well bore toe communicated with strong leakage layer - Google Patents
Well completion structure with well bore toe communicated with strong leakage layer Download PDFInfo
- Publication number
- CN220101247U CN220101247U CN202321556969.8U CN202321556969U CN220101247U CN 220101247 U CN220101247 U CN 220101247U CN 202321556969 U CN202321556969 U CN 202321556969U CN 220101247 U CN220101247 U CN 220101247U
- Authority
- CN
- China
- Prior art keywords
- well
- section
- wellbore
- toe
- shaft
- 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.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 claims abstract description 34
- 238000004891 communication Methods 0.000 claims abstract description 11
- 238000012856 packing Methods 0.000 claims description 68
- 239000002245 particle Substances 0.000 claims description 46
- 230000000977 initiatory effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 40
- 239000007788 liquid Substances 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 10
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 24
- 238000005553 drilling Methods 0.000 description 12
- 235000019198 oils Nutrition 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000008961 swelling Effects 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- CHRJZRDFSQHIFI-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;styrene Chemical compound C=CC1=CC=CC=C1.C=CC1=CC=CC=C1C=C CHRJZRDFSQHIFI-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000017488 activation-induced cell death of T cell Effects 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
A completion structure for a well toe in communication with a high loss zone, comprising: the well wall extends from the well head to a strong leakage section of the production interval, and the well wall defines and forms the well shaft; the shaft production section comprises a first shaft section, a second shaft section and a third shaft section which are sequentially communicated from a start end to a toe end; a screen disposed in a first wellbore section of the wellbore; a continuous packer disposed in an annulus between the screen and a wall of the first wellbore section and in a wellbore of the second wellbore section. The continuous packer is arranged in the second shaft section, so that the first shaft section is isolated from the bottom water of the strong leakage layer, and the water content of the produced liquid is effectively reduced; secondly, the method has the advantages of short time consumption in the well completion operation process, good sealing and isolating effect after production, long duration of action, no pollution to the underground reservoir, recovery of the continuous sealing and isolating body and the like.
Description
Technical Field
The utility model belongs to the technical field of oil and gas exploitation, and relates to a well completion structure of a well bore toe communicated with a high-leakage layer.
Background
In the drilling construction process of the offshore reef limestone oil field production layered oil and gas well, once the drilling front encounters a strong leakage section (such as a strong leakage layer with larger space or communicated bottom water, a large crack communicated with bottom water and the like), the drilling operation is difficult to continue. The reason is that in the drilling process, drill bits are required to drill rock formation to form rock scraps which are carried back out of a shaft by drilling fluid such as mud; once the drilling front is communicated with the strong leakage layer, a great amount of drilling fluid is leaked into the strong leakage layer, so that the rock debris can not realize flowback, and accidents such as well wall collapse, drill sticking and the like can occur. In actual work, once the drilling direction is communicated with the strong leakage layer, continuous drilling can be selected to be stopped, well completion construction operation is carried out on a well bore which is formed currently, the well bore is required to be sealed at the toe part or the front end position of the toe part of the well bore, and therefore the isolation between the inner space of the well bore and the strong leakage section is achieved, and the phenomenon that the water content of produced fluid is too high due to the fact that water of the strong leakage layer enters the well bore after casting is avoided.
In the prior art, the packing operation is generally carried out by adopting methods such as a liquid swelling packer, a chemical packing and the like. However, by adopting the method, firstly, the construction process is complex, the forming time is long, for example, the liquid swelling packer usually needs 7-30 days to reach the optimal working state; secondly, the packing effect is generally poor, and is influenced by the size, shape, well wall structure and other aspects of the well bore, gaps are easy to remain between the packer and the well bore after the packer is inflated when in contact with liquid, so that water in the strong leakage layer enters the well bore through the gaps; thirdly, the effective action duration is short, the sealing effect is obviously reduced after 3-5 years due to the influence of factors such as material denaturation and the like; fourthly, the chemical packing method has the problems of reservoir blockage and the like; fifthly, after completion of the well by adopting methods such as a liquid swelling packer, a chemical packing and the like, the packing body is difficult to take out.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a well completion structure with a well bore toe communicated with a high leakage layer.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a completion structure for a well toe in communication with a high loss zone, comprising: the well wall extends from the well head to a strong leakage section of the production interval, and the well wall defines and forms the well shaft; the shaft production section comprises a first shaft section, a second shaft section and a third shaft section which are sequentially communicated from a start end to a toe end; a screen disposed in a first wellbore section of the wellbore, one end of the screen proximate a production section initiation end being seated in the wellbore, the other end extending in the wellbore toward a wellbore toe to an end of the first wellbore section; a continuous packer disposed in an annulus between the screen and a wall of the first wellbore section and in a wellbore of the second wellbore section.
Further, an end of the third wellbore section is in communication with the strongly lost layer.
Further, the third wellbore section has a length less than 20% of the length of the production section wellbore.
Further, the second wellbore section has a length of not less than 2 meters.
Further, the starting end of the screen pipe is communicated to a wellhead through a blind pipe.
Further, the continuous packing body is formed by filling packing particles, and the steps are as follows: filling packing fluid carrying the packing particles into the production section wellbore annulus; the packing fluid is returned to a wellhead through the screen pipe, and the packing particles are blocked in the annular space of the first well bore section, the second well bore section and the third well bore section by the screen mesh of the screen pipe; after casting, the packer particles in the third wellbore section flow back to the annular space of the first wellbore section and the second wellbore section under the action of the fluid in the wellbore, so that the continuous packer is formed.
Further, in the step of filling the production zone wellbore annulus with the packing fluid carrying the spacer particles: the concentration of the packing particles in the pack fluid is greater than 30% (volume ratio); the packing fluid carrying the packing particles has a packing rate of less than 1 cubic meter/minute.
Further, the density of the pack particles is 0.9 to 1.2 g/cc (true density).
Further, the packing particles are of a spherical structure.
Further, the packing particles are one or more of polyethylene, high-density polyethylene, polypropylene, polyvinyl chloride and styrene divinylbenzene crosslinked copolymer materials.
The utility model has at least the following advantages: the continuous packing body arranged in the second shaft section realizes the isolation of the first shaft section and the bottom water of the strong leakage layer, and effectively reduces the water content of the produced liquid; compared with the traditional methods such as a liquid swelling packer, a chemical packing and the like, the method has the advantages of short time consumption in the well completion operation process, good packing effect after production, long duration, no pollution to a downhole reservoir, recovery of a continuous packing body and the like.
Drawings
FIG. 1 is a schematic of the overall construction of a well completion with a well toe in communication with a high loss zone in accordance with example 1 of the present utility model;
FIG. 2 is a schematic view showing the overall flow of the continuous packing body formed by filling the packing particles in example 1 of the present utility model.
Detailed Description
An embodiment of a well completion structure of the present utility model in which the toe of the wellbore communicates with a high loss zone is further described below with reference to fig. 1. The completion structure of the present utility model in which the toe of the wellbore communicates with the high loss zone is not limited to the description of the following embodiments.
The terms used herein are defined as follows: screen, also known in the industry as a downhole filter, or sand control tube. A water control screen, a specific structure of the screen, also known in the industry as a downhole flow control filter, or a flow control sand control pipe, a flow control screen, or a water control sand control pipe; the water control screen having an additional flow resistance function to water relative to oil is called AICD, and the water control screen having no additional flow resistance function to water is called ICD, both AICD and ICD belong to the category of water control screens. Annulus refers to the annular space between the screen (or water control screen) and the well wall. The ends of the sieve tube are all closed structures, for example, the ends of the sieve tube are closed by adopting parts such as plugs and the like. The density or volume of the spacer particles refers to the true density or volume, not the bulk density or volume. The wellbore continuous packer water control technology refers to a technology for controlling water by adopting the combined action of a wellbore inner water control screen pipe and an annular continuous packer. The filling rate, the production rate and the rate at which fluid is pumped through the well bore are all the volumes of filling fluid flowing through the well head per unit time. The wells described herein include horizontal wells, directional wells, vertical wells, water injection wells, oil wells, gas wells, and the like.
Currently, the continuous packer water control and oil increasing technology has been substantially developed and applied, for example, in chinese patent nos. 2021111193667 and 2019100846588, and by arranging the continuous packer in the annular space of the wellbore, the effects of preventing fluid from flowing through the wellbore axially in the wellbore direction and preventing fluid (particularly produced fluid) from entering the screen pipe radially are achieved, so that the technical effects of water control and oil increasing are achieved simultaneously. However, for a well bore with a toe in communication with a high-loss zone, if a screen pipe is run down to the position of the high-loss zone at the toe of the well bore, when packing particles are filled, the packing particles will leak out of the high-loss zone in a large amount, and cannot be accumulated in the well bore annulus to form a continuous packing body filling the whole annulus, and the end of the screen pipe is still in communication with the high-loss zone, so that effective well completion operation cannot be completed. Obviously, the prior art does not provide technical teaching of how to perform well completion operation for the continuous packer water control and oil enhancement technology aiming at a well bore with a well bore toe communicated with a strong leakage layer.
Example 1:
this embodiment provides a well completion structure with a well toe connected to a high-leakage layer, as shown in fig. 1, the well completion structure with a well toe connected to a high-leakage layer includes: a well wall 1, wherein the well wall 1 extends from a wellhead to a strong leakage section of a production interval, and the well wall 1 defines and forms the well bore; the well shaft production section comprises a first well shaft section, a second well shaft section and a third well shaft section which are sequentially communicated from a start end to a toe end (namely well shaft sections with lengths of L1, L2 and L3 respectively corresponding to those in the figure 1 in the specification); a screen 3, the screen 3 being disposed in a first section of the wellbore, one end of the screen 3 near the beginning of a production zone being seated in the wellbore, the other end extending in the wellbore towards the toe of the wellbore to the end of the first section; a continuous packer 5, the continuous packer 5 being disposed in an annulus between the screen 3 and the wall 1 of the first wellbore section and in a wellbore of the second wellbore section.
Specifically, the strong leakage layer 2 is, for example, a large karst cave, a large crack communicating with bottom water, or the like. When the well shaft toe is communicated with the strong leakage layer 2, the strong leakage layer 2 is often communicated with bottom water, after the oil well is put into operation, the bottom water flows and is produced along the well shaft under the action of a well bottom pressure difference due to the fact that the fluidity of the bottom water is obviously higher than that of oil in a matrix, and finally the water content in the produced liquid is very high. In this embodiment, the first wellbore section, the second wellbore section, and the third wellbore section are not well sections preset before completion operations, but well section names defined according to downhole conditions after completion operations are completed. The first shaft section is a horizontal well production section provided with a screen pipe 3, one end of the screen pipe 3, which is close to the beginning end of the production section, is provided with a top packer 6 or a similar device, and is set in the shaft, and the other end of the screen pipe extends into the shaft to the tail end of the first shaft section. The second wellbore section is provided with a continuous packer 5 after completion, and the continuous packer 5 axially isolates the first wellbore section from the third wellbore section, which is based on the principle that the continuous packer 5 has a larger length (e.g. 1-5 meters) in the axial direction of the wellbore, and the third wellbore section still communicates with the bottom water of the strongly lost layer 2, but the bottom water will face a very large resistance if it flows to the first wellbore section through the continuous packer 5 of the second wellbore section. Therefore, after the screen pipe 3 in the first shaft section is put into production, the screen pipe 3 can be free from the influence of the bottom water of the strong leakage layer 2 along the shaft channeling, and the production efficiency is improved. Meanwhile, the well completion structure of the first shaft section is the well completion structure adopting the continuous packer 5 water control and oil increase technology, and has the technical effect of water control and oil increase.
In this embodiment, the end of the third wellbore section communicates with the high leak-off layer 2.
Specifically, in actual drilling operation, the drilling front edge stops continuously drilling after encountering the strong leakage layer 2, at this time, the tail end of the third well section is already communicated with the strong leakage layer 2, and the well is required to be sealed at the toe or the toe front end of the well in the subsequent well completion process, so that the isolation between the inner space of the well and the strong leakage section is realized, and the phenomenon that the water content of produced liquid is too high due to the fact that water of the strong leakage layer 2 enters the well after casting is avoided.
In this embodiment, the third wellbore section has a length less than 20% of the length of the production section wellbore.
In particular, by employing the completion structures formed by the methods described in this example, the smaller the length of the third wellbore section, the better is expected. However, since the third wellbore section is already in communication with the strong leak-off layer 2, the packing fluid will carry the packer particles away from the strong leak-off layer 2 during packing of the packer particles, and thus will not form an integral, complete continuous packer 5 throughout the wellbore. According to the filling method described below, the packing particles retained in the third wellbore section during the filling process may be backfilled into the annulus of the first wellbore section and the second wellbore section under the drive (pushing) of the downhole fluid after production. For optimal production, it is desirable that the length of the first wellbore section is as large as possible and the length of the third wellbore section is as small as possible.
The estimation can be performed by the following method: recording device
Production zone wellbore radius: r is R
Screen 3 radius: r is (r)
Production section wellbore length: l (L)
Wellbore first section length corresponding to screen 3: l (L) 1
Second wellbore section length without screen 3 and with continuous packer 5: l (L) 2
Second wellbore section length without screen 3 and without continuous packer 5: l (L) 3
Wherein l=l1+l2+l3; then
The volume of the packer particles in the wellbore after completion of the pack (packed volume) V is at least:
V＝π(R 2 -r 2 )·L 1 +πR 2 ·L 2
during the actual packing operation, the number of packing particles packed into the wellbore (converted to a packed volume) may be determined to be 1.2-1.5 times the above-mentioned packed volume V.
In this embodiment, the second wellbore section has a length of not less than 2 meters.
Specifically, the purpose of the continuous packer 5 disposed in the second wellbore section is to realize axial isolation between the first wellbore section and the third wellbore section, so as to avoid bottom water communicated with the third wellbore section from entering the first wellbore section. It is therefore necessary to ensure that the continuous packing 5 provided in the second wellbore section is of sufficient length. Generally, the continuous packing body 5 has a length of more than 2 meters, and thus has a good anti-channeling effect.
In this embodiment, the beginning of the screen 3 is connected to the wellhead via a blind pipe 7.
Specifically, the beginning end (i.e. the end near the seat sealer) of the screen 3 is communicated to the wellhead through a blind pipe 7 for delivering the production fluid in the screen 3 to the surface. The pressure inside the screen pipe 3 is lower than the pressure of the stratum, and oil or oil-water mixture in the matrix outside the well bore enters the screen pipe 3 through the pressure difference inside and outside the screen pipe 3, and finally a wellhead is produced.
In this embodiment, the continuous packing body 5 is formed by filling packing particles, and the steps are as follows:
s1: filling packing liquid carrying packing particles into the annulus of the well bore of the production section;
the seat sealer is provided with a filling valve which can be controlled to be opened or closed, and filling liquid carrying packing particles is filled into a shaft ring space of a first shaft section of the shaft and shafts of a second shaft section and a third shaft section through the filling valve. The specific filling liquid components, filling method, and the like are the same as in the prior art.
S2: the filling liquid is returned to a wellhead through the screen pipe 3, and the packing particles are blocked in the annular space of the first well bore section, the second well bore section and the third well bore section by the screen 4 of the screen pipe 3;
in the filling process, the filling liquid in the annulus middle section is returned to a wellhead through the screen pipe 3, and packing particles are gradually accumulated at the position of the screen 4 outside the screen pipe 3; meanwhile, part of filling liquid continuously flows to the deep well bore through the annular space, passes through the second well bore section and the third well bore section and flows to the strong leakage stratum. At this time, the filling rate of the filling liquid should be controlled, and the flow-back rate should be appropriately increased. Preferably, the packing rate may be equal to or slightly greater than the flowback rate, to ensure as much packing particles remain in the wellbore as possible, while avoiding carry over of the packed fluid into the strongly lost circulation layer 2.
S3: after casting, the packer particles in the third wellbore section flow back to the annulus of the first wellbore section and the second wellbore section under the action of the fluid in the wellbore, so as to form the continuous packer 5.
Wherein, when the production is just put into operation, the second shaft section is not completely filled with the packing particles, and the continuous packing body 5 is not completely established yet. At this time, the bottom water communicated in the third well section flows to the first well section through the second well section, and synchronously carries the packing particles in the third well section to move to the second well section and synchronously carries the packing particles in the second well section to move to the well annulus of the first well section. As production proceeds, a continuous pack 5 is formed until the wellbore annulus of the first wellbore section and the second wellbore section are completely filled with pack-off particles.
In this embodiment, the step of filling the production zone wellbore annulus with a packing fluid carrying packing particles comprises: the concentration of the packing particles in the pack fluid is greater than 30% (volume ratio); the packing fluid carrying the packing particles has a packing rate of less than 1 cubic meter/minute.
Specifically, after the packer particles are carried by the packing fluid to the high loss zone 2, the portion of the packer particles may be considered to be almost impossible to backfill into the wellbore to form the continuous packer 5. In order to reduce the carry-over of the packer particles by the pack fluid to the strongly lost layer 2, it may be optimised in two ways: firstly, the concentration of the packing particles in the filling liquid is increased, and the concentration is set to be more than 30 percent (volume ratio), so that the packing particles with the same volume are filled, the consumption of the filling liquid can be reduced, and the quantity of the filling liquid carrying particles entering the strong leakage layer 2 is reduced; secondly, the filling rate of the filling liquid carrying the packing particles is reduced, so that the volume of the filling liquid flowing into the high-leakage layer 2 can be directly reduced, and the packing particles can be promoted to be adsorbed on the screen 4 of the screen 3 or to be remained in the second well bore section or the third well bore section as soon as possible, so that the possibility of being carried to the high-leakage layer 2 is further reduced.
In this embodiment, the density of the spacer particles is 0.9-1.2 g/cc (true density); the packing particles are of spherical structures; the packing particles are one or more of polyethylene, high-density polyethylene, polypropylene, polyvinyl chloride and styrene divinylbenzene crosslinked copolymer materials.
The embodiment has at least the following technical effects: firstly, through the continuous packing body 5 arranged in the second shaft section, the isolation of the first shaft section and the bottom water of the strong leakage layer 2 is realized, and the water content of the produced liquid is effectively reduced; compared with the traditional methods such as a liquid swelling packer, a chemical packing and the like, the method has the advantages of short time consumption in the well completion operation process, good packing effect after production, long duration, no pollution to a downhole reservoir, recovery of the continuous packing body 5 and the like.
The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.
Claims (7)
1. A completion structure for a well toe in communication with a high loss zone, comprising:
the well wall extends from the well head to a strong leakage section of the production interval, and the well wall defines and forms the well shaft; the shaft production section comprises a first shaft section, a second shaft section and a third shaft section which are sequentially communicated from a start end to a toe end;
a screen disposed in a first wellbore section of the wellbore, one end of the screen proximate a production section initiation end being seated in the wellbore, the other end extending in the wellbore toward a wellbore toe to an end of the first wellbore section;
a continuous packer disposed in an annulus between the screen and a wall of the first wellbore section and in a wellbore of the second wellbore section.
2. The well completion structure of claim 1, wherein the well toe communicates with the high loss zone, wherein: the end of the third wellbore section is in communication with the high leakage layer.
3. The well completion structure of the well bore toe communication high loss zone of claim 2, wherein: the third wellbore section has a length less than 20% of the length of the production section wellbore.
4. A well completion structure for a well bore toe communication high loss zone according to claim 3, wherein: the second wellbore section has a length of not less than 2 meters.
5. The well completion structure of claim 4, wherein the well toe communicates with the high loss zone, wherein: and the starting end of the screen pipe is communicated to a wellhead through a blind pipe.
6. The well completion structure of claim 5, wherein the well toe communicates with the high loss zone, wherein: the continuous packing body is of a packing particle stacking and forming structure.
7. The well completion structure of claim 6, wherein the well toe communicates with the high loss zone, wherein: the packing particles are of a spherical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321556969.8U CN220101247U (en) | 2023-06-19 | 2023-06-19 | Well completion structure with well bore toe communicated with strong leakage layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321556969.8U CN220101247U (en) | 2023-06-19 | 2023-06-19 | Well completion structure with well bore toe communicated with strong leakage layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220101247U true CN220101247U (en) | 2023-11-28 |
Family
ID=88864934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321556969.8U Active CN220101247U (en) | 2023-06-19 | 2023-06-19 | Well completion structure with well bore toe communicated with strong leakage layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220101247U (en) |
-
2023
- 2023-06-19 CN CN202321556969.8U patent/CN220101247U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101864921B (en) | Well completion and oil production string of horizontal well and well completion and oil production processes thereof | |
| CN110118073B (en) | Multi-section plug grading plugging method suitable for fractured stratum | |
| CN109653707B (en) | Method for dewatering and increasing oil by filling packing body particles in oil and gas well of fractured oil and gas reservoir | |
| CN107620582B (en) | Bilayer sleeve sand control completion technique and double-layer anti-sand completion tubular column | |
| CA2226928C (en) | Multiple zone well completion method and apparatus | |
| CN110424912B (en) | Method for replacing filling layer without changing pipe column, flowback service device and well completion structure | |
| CN105134141B (en) | A kind of process pipe string | |
| GB2376486A (en) | A gravel-inflatable element for sealing wells | |
| CN210685949U (en) | Well completion structure for injection and production in same well | |
| CN103688015A (en) | Wellbore apparatus and methods for multi-zone well completion, production and injection | |
| CN201705276U (en) | Well completion and flow string of horizontal well | |
| WO2021004163A1 (en) | Packing method for injection and production in same well and well completion structure | |
| CN101705808A (en) | Sectional flow control method for flow control filter pipe column of oil-gas well with bushing outside channel | |
| CN110159239B (en) | Vertical well large-scale hydraulic fracturing oil jacket co-injection fracturing method | |
| CN104080999B (en) | The method that pressure break is carried out while drilling well | |
| US3228470A (en) | Method of mitigating the production of undesirable gas or water in oil wells | |
| CN101338660B (en) | Horizontal production-injection well completion structure possessing flow control function | |
| CN106223898B (en) | Two horizontal well cementing and completion integrated pipe column devices that open | |
| CN220101247U (en) | Well completion structure with well bore toe communicated with strong leakage layer | |
| CN111706305A (en) | Selective segmented well cementation process and well body structure of double-target-layer coal bed gas well | |
| CN109138932A (en) | A kind of chemical packer segmentation control water completion method of straight well filling combination | |
| WO2022183898A1 (en) | Method for operating water injection well, and water injection well | |
| CN113006750B (en) | Construction tool and method for improving recovery ratio of low-permeability reservoir horizontal well | |
| CN215672154U (en) | Water injection well | |
| CN216950311U (en) | Packer and well completion structure for improving axial packing effect of continuous packing body along shaft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |