CN114575782A - Ash squeezing well repairing pipe column and ash squeezing well repairing method - Google Patents
Ash squeezing well repairing pipe column and ash squeezing well repairing method Download PDFInfo
- Publication number
- CN114575782A CN114575782A CN202011383402.6A CN202011383402A CN114575782A CN 114575782 A CN114575782 A CN 114575782A CN 202011383402 A CN202011383402 A CN 202011383402A CN 114575782 A CN114575782 A CN 114575782A
- Authority
- CN
- China
- Prior art keywords
- packer
- ash
- squeezing
- cement
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000004568 cement Substances 0.000 claims abstract description 80
- 239000002002 slurry Substances 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 10
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B33/138—Plastering the borehole wall; Injecting into the formation
Abstract
The invention provides an ash squeezing workover string and an ash squeezing workover method, belonging to the field of petroleum exploitation mechanical equipment, wherein the ash squeezing workover string comprises an oil pipe and a plurality of connecting pipes which are sequentially connected in series from top to bottom: the circulating valve is used for controlling the communication and the partition of the oil pipe and the oil sleeve annulus; the packer is a packer capable of being repeatedly set; and the pen point is used for injecting cement slurry into the underground and pressing. The cement squeezing workover string and the cement squeezing workover method provided by the invention can carry out cement plugging operation on a jetted layer by one time of string, and are simple, convenient, efficient and low in cost.
Description
Technical Field
The invention relates to the field of petroleum exploitation mechanical equipment, in particular to a cement squeezing well repairing pipe column and a cement squeezing well repairing method for shaft cement squeezing and plugging operation.
Background
In the oil field production process, in order to recognize the oil-gas condition of the stratum and achieve the aim of geological resource exploration to the maximum extent, a plurality of perforation layers are often arranged in a shaft of a test oil well or a shaft of an old well. During production, a perforated layer with oil and gas production value needs to be reserved, and meanwhile, cementing is needed to plug a perforated layer without oil and gas display or industrial exploitation value.
The construction (squeezing construction) of the conventional cement plugging operation at present comprises the following steps: generally, a first layer of a jetted layer is plugged (from top to bottom), and a cement extruding pipe column is put down to the depth of a layer needing plugging (the plugging layer at the uppermost part); cement is injected into the plugging layer through a cement extruding pipe column, then the cement extruding pipe column is lifted up and excess cement slurry is washed out in a reverse circulation mode, and the cement is extruded into the open layer through the whole well barrel in a pressurized mode; then, waiting for setting of cement paste, deepening the position of the oil pipe column, which is detected by the cement plug surface, and pressurizing and checking the cement plug after waiting for setting; then the drilling plug pipe column is lowered to drill through the cement plug, and then the drilling plug pipe column is taken out; and finally, a tubular column with a packer is put in, the packer is seated on the lower part of the ash squeezing layer, annular pressurization is carried out on the plugging layer for pressure test, and the next operation is carried out after the pressure test is qualified. And after the first layer of the penetrated layer is plugged, the second layer of the penetrated layer can be plugged, and the squeezing and plugging construction of the lower layer is continued.
In the existing cement plugging operation, due to the fact that pressure difference among all layers is large, stratum suction capacity is inconsistent and the like, the required plugging pressure difference is large when each layer is plugged, the problem that the conventional construction method has certain difficulty is solved, meanwhile, the conventional construction method is limited by the pressure bearing capacity of the upper stratum (the lower stratum ash squeezing pressure cannot exceed the pressure test pressure of the upper stratum), in order to ensure the lower stratum plugging construction effect, a cement retainer is required to be selected for lower plugging operation, after the plugging operation is completed, a cement retainer needs to be drilled, production operation can be carried out, the operation period of drilling and grinding the cement retainer (made of metal materials) is long, the operation cost is high, and a pipe column needs to be taken down for multiple times and a pressure well is washed circularly, so that damage is easily caused to the production layer.
In view of the above, the inventor designs an ash squeezing well repairing pipe column and an ash squeezing well repairing method through repeated experiments according to production design experiences of the field and related fields for many years, so as to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide an ash squeezing workover string and a method, which can carry out cement plugging operation on a jetted layer by one trip of the string.
In order to achieve the purpose, the invention provides an ash squeezing workover string, wherein the ash squeezing workover string comprises an oil pipe and a plurality of connecting pipes which are sequentially connected in series from top to bottom:
the circulating valve is used for controlling the communication and the partition of the oil pipe and the oil sleeve annulus;
the packer is a packer capable of being repeatedly set;
and the pen point is used for injecting cement slurry into the underground and pressing.
The pipe string for ash squeeze workover treatment as described above, wherein the circulation valve is a pump-out circulation valve.
The ash squeeze workover string as described above, wherein the packer is a Y211 type packer.
The ash squeezing workover string is characterized in that the pen point is also connected with the oil pipe through a safety joint.
The invention also provides an ash squeezing well repairing method, which is used for carrying out ash squeezing well repairing operation on a layer to be plugged below a plugged layer, wherein the ash squeezing well repairing method comprises the following steps:
step 1, setting the ash squeezing workover string according to claim 1 and injecting cement slurry into the layer to be plugged by using the ash squeezing workover string so as to wash out excess cement;
step 2, lifting the ash squeezing workover string to enable the packer to be between the layer to be plugged and the plugged layer, and setting the packer;
step 3, pressing the pipe column for the ash squeezing well workover to the underground, and then waiting for setting until cement paste forms a cement plug;
step 4, unsealing the packer and finding out the position of the cement plug through the pen point;
step 5, re-setting the packer and checking the sealing performance of the cement plug;
and 6, opening the circulating valve and performing circulating well washing operation.
The cement squeezing well repairing method comprises the following steps that in the step 1, the cement squeezing well repairing tubular column is firstly lowered to 15 meters below the layer section to be plugged, and cement paste is squeezed to the layer to be plugged through the oil pipe and the pen point; and then lifting the ash squeezing workover string to a second preset height to wash out the redundant cement slurry.
The method for squeezing out the ash to repair the well, wherein in the step 5, the string for squeezing out the ash to repair the well is lifted upwards, the packer is lifted up again between the layer to be blocked and the blocked layer, and the packer is set again.
The method for squeezing out cement to repair a well is characterized in that in the step 5, after the packer is set again, the oil pipe is pressed by 12-15 MPa, and the sealing performance of the cement plug is verified by positive pressure.
The method for repairing the well by squeezing out the ash comprises the following steps that in the step 5, if the sealing needs to be checked by negative pressure, a test tree is installed at the well mouth, the negative pressure is generated in the shaft by adopting a suction mode, and the sealing performance of the cement plug is checked by the negative pressure.
The ash squeezing well repairing method further comprises a step 7 of unsealing the packer and taking out the ash squeezing well repairing pipe column of the well inner pipe after the well washing is qualified in the step 6.
The ash squeezing well repairing pipe column and the ash squeezing well repairing method provided by the invention have the following characteristics and effects:
the invention provides an ash squeezing well repairing pipe column and an ash squeezing well repairing method, which aim at performing ash squeezing well repairing operation on a shaft with a plurality of shot layers, and realize ash squeezing, cement paste washing, artificial well bottom detection and positive and negative pressure seal-checking cement plug operation on one shot layer (to-be-plugged layer) by utilizing a one-time pipe column. Compared with the conventional tubular column, the ash squeezing well repairing tubular column structure integrates a circulating valve, a packer and a pen point and can realize various operation tasks; especially, a packer capable of repeatedly setting is arranged above the pen point, so that the squeezing and sealing test processes of each sealing layer in the shaft are mutually independent, and the influence and damage to the sealing quality and effect of the sealed layer due to pressure difference between layers are avoided.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.
FIG. 1 is a schematic structural diagram of a pipe string for squeezing ash and repairing a well according to the present invention;
FIG. 2 is a flow chart of the method for repairing a well by squeezing ash according to the present invention.
Description of reference numerals:
100. performing ash squeezing and well repairing on the pipe column; 10. An oil pipe;
20. a circulation valve; 30. A packer;
40. a pen point; 50. A safety joint;
300. the blocking layer is sealed. 200. A layer to be plugged;
Detailed Description
The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and should not be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may be present.
As shown in fig. 1 and fig. 2, the ash squeezing workover string 100 provided by the present invention comprises a tubing 10, and a circulating valve 20, a packer 30 and a pen tip 40 sequentially connected in series on the tubing 10 from top to bottom, wherein the circulating valve 20 is used for controlling the communication and the isolation between the tubing 10 and an oil casing annulus; the packer 30 is a packer that can be set repeatedly; the nib 40 is used to inject cement slurry downhole and to pressurize.
The invention also provides an ash squeezing well repairing method, which is used for carrying out ash squeezing well repairing operation on the layer 200 to be plugged which is positioned below the plugged layer 300, and the ash squeezing well repairing method comprises the following steps: step 1, the ash squeezing workover string 100 is put into a downhole layer to be plugged 200, a circulating valve 20 is closed, cement slurry is injected into the layer to be plugged 200 through an oil pipe 10 and a pen point 40, and then excess cement is washed out;
step 2, lifting the ash squeezing workover string 100 to lift the packer 30 to a designed setting position, wherein the designed setting position is located between the layer to be plugged 200 and the plugged layer 300, and setting the packer 30 at the designed setting position;
step 3, pressing the well by the ash squeezing well repairing pipe column 100, and then waiting for setting until cement paste forms a cement plug;
step 4, unsealing the packer 30 and finding the position of the cement plug through a pen point 40;
step 5, re-setting the packer 30 and checking the sealing performance of the cement plug;
and 6, opening the circulating valve 20 and performing circulating well washing operation.
The invention provides an ash squeezing well repairing pipe column 100 and an ash squeezing well repairing method, which aim at performing ash squeezing well repairing operation on a shaft with a plurality of shot layers, and realize ash squeezing, cement paste washing, artificial well bottom detection and positive and negative pressure seal cement plug operation on one shot layer (to-be-plugged layer) by utilizing a one-time pipe column. Compared with the conventional tubular column, the structure of the ash squeezing well repairing tubular column 100 integrates the circulating valve 20, the packer 30 and the pen point 40 to realize various operation tasks; particularly, the packer 30 capable of being repeatedly set is arranged above the pen point 40, so that the extrusion and sealing test processes of each sealing layer in the shaft can be mutually independent, and the influence and damage to the sealing quality and effect of the sealed layer due to pressure difference between layers can be avoided.
The cement extruding workover string 100 and the cement extruding workover method are particularly suitable for the condition that a sealed layer 300 and a layer 200 to be sealed exist in a shaft, the layer 200 to be sealed is positioned below the sealed layer 300, and the packer 30 is set between the sealed layer 300 and the layer 200 to be sealed, so that the condition that the plugging effect of the sealed layer 300 is influenced and even the plugging is lost due to overhigh extrusion pressure and plugging testing pressure when the layer 200 to be sealed is avoided.
The ash squeezing well repairing pipe column 100 and the ash squeezing well repairing method provided by the invention do not need matched tools, have the characteristics of simple and convenient operation, short construction period, low cost and high efficiency, have good adaptability in multilayer plugging operation of a test oil well and an old well, and particularly aim at a new well with large stratum heterogeneity or an old well which is developed for many years and has serious stratum energy attenuation, and the ash squeezing well repairing pipe column 100 and the ash squeezing well repairing method have wide application prospects in adaptability.
In an alternative embodiment of the present invention, in step 1, the ash-squeezing workover string 100 is first lowered to about 15 meters below the layer to be plugged 200 (a first predetermined height), and cement slurry is squeezed to the layer to be plugged 200 through the tubing 10 and the pen point 40; the squeeze string 100 is then lifted to a second predetermined height to wash out excess cement slurry. The second predetermined height may be determined according to the density and volume of the injected cement slurry, and may be obtained by calculation in the prior art, which is not described herein again.
Furthermore, in the step 1, the cement mortar section density of the cement paste is required to be consistent, no muddy mortar exists, and the cement setting strength reaches the standard.
In an alternative embodiment of the present invention, in step 5, the cement squeeze workover string 100 is raised, the packer 30 is raised again to the design set position, and the packer 30 is set again at the design set position.
Further, in the step 5, after the packer 30 is set again, 12-15 MPa (according to the cement plug seal checking standard) is pressed into the oil pipe 10, and positive pressure checking is carried out on the tightness of the cement plug.
And further, if the seal is tested under negative pressure, a test tree is installed at the wellhead, the negative pressure is generated in the shaft in a pumping mode, and the tightness of the cement plug is further tested under the negative pressure.
In an alternative embodiment of the present invention, the circulation valve 20 is a pump-out circulation valve, and in step 6, the circulation valve 20 is opened by pressing the oil casing annulus, so that the oil pipe and the oil casing annulus are communicated, thereby ensuring that the subsequent circulation well-flushing operation is performed smoothly.
In the present invention, the circulation valve 20 can be an existing pump-out circulation valve, which is used to establish a circulation channel between the tubing 10 and the oil casing annulus before the packer 30 is unset, so as to realize circulation and kill. The circulation valve 20 is opened by the phase oil ring being pressed empty.
In an optional embodiment of the invention, the method for performing the ash squeeze workover treatment further comprises a step 7 of unsealing the packer 30 and taking out the ash squeeze workover string 100 in the well pipe after the well washing is qualified in the step 6.
In an alternative embodiment of the invention, the packer 30 is a Y211 type packer, and setting and unsetting of the packer 30 may be accomplished by raising and lowering the string.
In an alternative embodiment of the invention, the nib 40 is connected to the tubing 10 by a safety joint 50. When the squeeze workover string 100 is stuck in the wellbore, it may be backed off from the safety joint 50, thereby lifting the upper portion of the squeeze workover string 100 (tubing 10 and packer 30).
Referring to fig. 1 and fig. 2, an embodiment of the present invention will now be described in detail with reference to the following drawings:
the embodiment aims at the condition that the plugged layer 300 and the layer to be plugged 200 exist in the well, and influences, even causes the condition of sealing failure, on the plugging effect of the plugged layer 300 due to overhigh squeezing pressure and sealing testing pressure when the layer to be plugged 200 is plugged are avoided.
First, the oil pipe 10, the circulation valve 20, the packer 30, the setting sub 50, and the pen point 40 are connected to the ground according to the construction work purpose and the design of the well string, and the assembly of the ash squeeze workover string 100 is completed.
Then, performing ash squeezing workover operation on the to-be-plugged layer 200 by using the assembled ash squeezing workover string 100:
step 1, a cement-squeezing workover string 100 is lowered to about 15 meters below a layer to be plugged 200 (a first preset height); after the ash squeezing workover string 100 reaches a first preset height, squeezing cement slurry to the layer to be blocked 200 through the oil pipe 10 and the pen point 40, then lifting the ash squeezing workover string 100 to the first preset height, and washing out excessive cement slurry;
step 2, lifting the ash-extruding workover string 100 to enable the packer 30 to be at a designed setting position, and setting the Y211 type packer 30 by lifting and lowering the string;
step 3, pressing and squeezing the oil pipe 10 to the designed squeezing amount or the designed setting-waiting pressure (protecting the sealed layer 300), observing the setting-waiting pressure after the squeezing and plugging construction is finished, and setting-waiting until cement paste forms a cement plug;
step 4, after waiting for the setting, lifting the pipe column to unseal the packer 30, then lowering the pipe column to probe the artificial well bottom by using a pen point 40, and then implementing the position of the cement plug surface;
step 5, lifting the pipe column to enable the packer 30 to reach a designed setting position, re-setting the packer 30 by lifting and lowering the pipe column, and pressurizing 12-15 MPa (according to the cement plug seal inspection standard) in the oil pipe 10 to perform positive pressure verification on the sealing performance of the cement plug; if the seal needs to be tested under negative pressure, a test tree is installed at the wellhead, negative pressure is generated in the shaft in a pumping mode, and the tightness of the cement plug is further verified under negative pressure;
step 6, after the pressure test of the cement plug is qualified, pressurizing the oil sleeve annulus, opening a circulating valve 20, and performing circulating pressure washing well operation;
and 7, after the well is washed to be qualified, unsealing the packer 30, and taking out the packer from the well to lift and squeeze the ash well repairing pipe column 100.
According to the ash squeezing well repairing operation process, the ash squeezing well repairing pipe column 100 and the ash squeezing well repairing method provided by the invention can complete plugging, slurry replacing, slurry washing, cement plug surface detecting and pressure testing operations of a layer to be plugged by one time of pipe column, and can carry out the next construction.
The foregoing embodiments are described in detail for the purpose of illustrating the invention and are not to be construed as limiting the invention in any way, but for the purpose of limiting the invention in any way, and in particular, various features described in different embodiments can be combined with one another as desired to form other embodiments, unless explicitly stated to the contrary, which features are to be understood as being applicable to any one embodiment and not limited to only the described embodiments.
Claims (10)
1. The utility model provides a crowded grey workover tubular column, its characterized in that, crowded grey workover tubular column includes oil pipe and from top to bottom order series connection is in on the oil pipe:
the circulating valve is used for controlling the communication and the partition of the oil pipe and the oil sleeve annulus;
the packer is a packer capable of being repeatedly set;
and the pen point is used for injecting cement slurry into the underground and pressing.
2. The ash squeeze workover string of claim 1, wherein the circulation valve is a pump-out circulation valve.
3. The ash squeeze workover string of claim 1, wherein the packer is a Y211-type packer.
4. The squeeze cementing string of claim 1, wherein the pen tip is further connected to the tubing via a safety joint.
5. A method for performing squeeze cementing operation on a layer to be plugged which is positioned below a plugged layer, which is characterized by comprising the following steps:
step 1, setting the ash squeezing workover string according to claim 1 and injecting cement slurry into the layer to be plugged by using the ash squeezing workover string so as to wash out excess cement;
step 2, lifting the ash squeezing workover string to enable the packer to be between the layer to be plugged and the plugged layer, and setting the packer;
step 3, pressing the pipe column for the ash squeezing well workover to the underground, and then waiting for setting until cement paste forms a cement plug;
step 4, unsealing the packer and finding out the position of the cement plug through the pen point;
step 5, re-setting the packer and checking the sealing performance of the cement plug;
and 6, opening the circulating valve and performing circulating well washing operation.
6. The squeeze cementing method according to claim 5, wherein in step 1, the squeeze cementing string is firstly lowered to 15 meters below the interval to be plugged, and cement slurry is squeezed to the interval to be plugged through the oil pipe and the pen point; and then lifting the ash squeezing workover string to a second preset height to wash out the redundant cement slurry.
7. The method of claim 5, wherein in step 5, the pipe string is lifted up, the packer is lifted up again between the layer to be plugged and the plugged layer, and the packer is set again.
8. The method for repairing a well by squeezing ash in accordance with claim 7, wherein in the step 5, after the packer is set again, the oil pipe is pressed by 12-15 MPa, and the tightness of the cement plug is verified by positive pressure.
9. The method for squeeze cementing of claim 8, wherein in step 5, if a negative pressure seal is required, a test tree is installed at the wellhead, a negative pressure is created in the wellbore by suction, and the negative pressure verifies the sealing performance of the cement plug.
10. The method of claim 5, further comprising step 7 of unsetting the packer and tripping the ash squeeze workover string out of the well casing after the well wash of step 6 is passed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011383402.6A CN114575782A (en) | 2020-12-01 | 2020-12-01 | Ash squeezing well repairing pipe column and ash squeezing well repairing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011383402.6A CN114575782A (en) | 2020-12-01 | 2020-12-01 | Ash squeezing well repairing pipe column and ash squeezing well repairing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114575782A true CN114575782A (en) | 2022-06-03 |
Family
ID=81766686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011383402.6A Pending CN114575782A (en) | 2020-12-01 | 2020-12-01 | Ash squeezing well repairing pipe column and ash squeezing well repairing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114575782A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1563663A (en) * | 2004-04-16 | 2005-01-12 | 辽河石油勘探局 | Technique for plugging high penetrative water-yielding stratum in oil well by using superfine cement |
| CN201650197U (en) * | 2010-04-26 | 2010-11-24 | 中国石油集团川庆钻探工程有限公司 | Packer extruding and sealing device |
| CN102678098A (en) * | 2012-06-01 | 2012-09-19 | 中国石油天然气股份有限公司 | Lamellar water logging exhausted oil well blocking and dredging combined tapping potential production increase method |
| US20150267501A1 (en) * | 2014-03-20 | 2015-09-24 | Saudi Arabian Oil Company | Method and apparatus for sealing an undesirable formation zone in the wall of a wellbore |
| CN207776833U (en) * | 2017-10-26 | 2018-08-28 | 陕西鼎和源瑞环境工程有限公司 | A kind of multifunctional squeezing ash bridge plug |
-
2020
- 2020-12-01 CN CN202011383402.6A patent/CN114575782A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1563663A (en) * | 2004-04-16 | 2005-01-12 | 辽河石油勘探局 | Technique for plugging high penetrative water-yielding stratum in oil well by using superfine cement |
| CN201650197U (en) * | 2010-04-26 | 2010-11-24 | 中国石油集团川庆钻探工程有限公司 | Packer extruding and sealing device |
| CN102678098A (en) * | 2012-06-01 | 2012-09-19 | 中国石油天然气股份有限公司 | Lamellar water logging exhausted oil well blocking and dredging combined tapping potential production increase method |
| US20150267501A1 (en) * | 2014-03-20 | 2015-09-24 | Saudi Arabian Oil Company | Method and apparatus for sealing an undesirable formation zone in the wall of a wellbore |
| CN207776833U (en) * | 2017-10-26 | 2018-08-28 | 陕西鼎和源瑞环境工程有限公司 | A kind of multifunctional squeezing ash bridge plug |
Non-Patent Citations (3)
| Title |
|---|
| "封隔器卡封注灰在濮城油田的应用", 《化工设计通讯》, vol. 43, no. 4, pages 3 - 4 * |
| 贾正发: "侧钻井小井眼内事故处理技术", 《石油钻采工艺》, vol. 33, no. 5, pages 1 * |
| 陈惟国: "提高分压选压效果技术研究", 《石油钻采工艺》, vol. 25, no. 4, pages 1 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0586223B1 (en) | Method of perforating a new zone | |
| US4694903A (en) | Flapper type annulus pressure responsive tubing tester valve | |
| CN108625830B (en) | Ball throwing type layering sand prevention process pipe column and method thereof | |
| CN110410021B (en) | Well completion testing string and method for gas well | |
| CN101975041B (en) | Well cementing method for avoiding coal bed and device thereof | |
| CN112012667B (en) | Oil testing and well completion integrated pipe string combined with fine pressure control technology | |
| US8807227B2 (en) | Method and apparatus for pressure testing a tubular body | |
| CN111577257B (en) | Horizontal well subsection setting type flow metering water exploration pipe column and water exploration method thereof | |
| US9624764B2 (en) | Method and apparatus for testing a tubular annular seal | |
| CN202788741U (en) | Completion tool free of drilling and plugging | |
| CN111706305A (en) | Selective segmented well cementation process and well body structure of double-target-layer coal bed gas well | |
| CN210134883U (en) | Injection-production integrated pipe column in same well | |
| CN114575782A (en) | Ash squeezing well repairing pipe column and ash squeezing well repairing method | |
| CN216008464U (en) | Reverse layering fracturing string based on temporary plugging soluble sieve tube | |
| US11719072B2 (en) | Well sealing tool with isolatable setting chamber | |
| CN111911144B (en) | Double-seal straddle test pipe column | |
| CN111485852B (en) | Oil-gas well casing liquid resin plugging squeezing tool and construction process | |
| CN115853471A (en) | Horizontal well blocking, filling and commingling production process pipe column and method | |
| CN113803016A (en) | Well cementation segmented reconstruction pipe column and method | |
| CN114109298A (en) | Method for cementing lost-circulation zone well section | |
| CN112065296A (en) | Well completion operation method combining fine pressure control technology | |
| CN219262336U (en) | Casing damage underground long-acting packing device for petroleum exploitation | |
| CN112593894B (en) | Multi-purpose multi-stage discontinuous well cementation method for preventing pollution of production layer | |
| CN213016310U (en) | Multifunctional well completion and fracturing integrated pipe column | |
| CN213775327U (en) | Drifting and casing inspection integrated tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |