CN113153207A - Packer driven by gas and packer setting method - Google Patents
Packer driven by gas and packer setting method Download PDFInfo
- Publication number
- CN113153207A CN113153207A CN202110651047.4A CN202110651047A CN113153207A CN 113153207 A CN113153207 A CN 113153207A CN 202110651047 A CN202110651047 A CN 202110651047A CN 113153207 A CN113153207 A CN 113153207A
- Authority
- CN
- China
- Prior art keywords
- packer
- gas
- driven
- setting
- anchoring
- 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 26
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 238000004873 anchoring Methods 0.000 claims description 33
- 238000007789 sealing Methods 0.000 claims description 20
- 238000003801 milling Methods 0.000 claims description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- 239000012071 phase Substances 0.000 abstract description 10
- 239000007791 liquid phase Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 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
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- 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
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
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)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a packer driven by gas and a packer setting method, wherein the packer is driven by the gas to be fed in through a drill rod under pressure, the one-trip midway test under the gas drilling condition is realized, the original liquid-phase medium replaces gas phase, well killing, the midway test and the gas-phase medium replaces liquid phase, the recovery of a dry shaft from gas drilling is simplified into the direct test of directly feeding the packer under pressure under the gas medium condition, and the gas drilling is directly recovered after the test. The drilling-logging-well completion efficiency is improved, the collapse of water-sensitive stratum and the sticking of mud bags to the drill are avoided, the reservoir pollution is reduced, the operation time and the cost are saved, the exploratory well can be directly converted into a production well, and the exploration and development pace of the oil and gas well is accelerated.
Description
Technical Field
The invention relates to a packer driven by gas and a packer setting method, and belongs to the field of gas drilling midway testing.
Background
An in-flight test is a process used to determine the completion method for a hydrocarbon reservoir found in drilling or at a formation of interest after completion of drilling. The midway test can timely and accurately know the specific conditions of reservoir performance, contained oil, gas and water yield and the like in the process of drilling.
Gas drilling technology is one of the most effective means for developing low permeability, low porosity, water sensitive hydrocarbon reservoirs. At present, gas drilling is widely applied to various oil fields such as Xinjiang, Sichuan and Qinghai, the drilling speed is greatly improved, and the drilling cost is saved. When oil and gas display is met in the gas drilling process, the oil and gas display needs to be immediately tested midway to know the properties, the yield and the reservoir physical property parameters of formation oil and gas, and the method has extremely important guiding significance for finding an oil and gas reservoir, improving the yield of a single well and completing and developing the later period of the reservoir.
At present, packers at home and abroad are designed aiming at the condition that a shaft is a liquid-phase medium and cannot be set and normally work under the condition of a gas-phase medium. When a gas layer is required to be tested halfway in drilling during gas drilling, a shaft gas-phase working medium needs to be converted into a liquid phase, after the testing is finished, shaft working liquid needs to be converted into gas again, and a shaft is dried. In order to solve the problems, a packer which is driven by gas to set is developed.
Disclosure of Invention
The invention aims to: the invention aims to overcome the problems in the prior art and provides a packer driven by gas and a packer setting method.
In order to achieve the above object, the present invention provides a gas-driven packer and a packer setting method, the method comprising the steps of:
s100, packer setting technology under the condition of a full well bore gas phase medium;
s101, a gas-driven packer setting technology is characterized in that: when an oil-gas layer is encountered in the drilling process of gas drilling, and a midway test is needed, a gas-phase medium in a shaft does not need to be replaced by a liquid phase, and after the test is finished, the liquid in the shaft does not need to be replaced by gas again, and the shaft is dried;
s200, gas drive sits and seals packer, takes off hand mechanism, packer body, mills deblocking mechanism, shear pin formula and sits blind stifled, its characterized in that including the anchoring:
s201, threads are arranged on the upper portion and the lower portion of a gas-driven setting packer main body, the threads at the upper end are connected with anchoring sealing threads, and the anchoring sealing threads are threads of a gas-tight oil pipe;
s202, a hydraulic cylinder pressure transfer hole of a gas-driven packer is designed on a mandrel, the lower end of the packer is connected with a shear pin type setting blind plug, and the packer is directly pressurized without throwing balls during setting;
s203, the packer slip is a telescopic thread slip mechanism, the outer diameter of the slip is smaller than that of the packer body, the vertex angle of a thread tooth is 60 degrees, the slip retracts into the packer body when the drill is put down, and the slip is opened when the drill is set. The packer can be applied to an operation well with pressure, and can be pressed into the well with pressure and drilled down with pressure by rotating a blowout preventer;
s204, the inner diameter of the gas-driven packer is a full drift diameter;
s205, the packer is provided with a special inner locking ring mechanism, and a rubber cylinder, an upper slip and a lower slip are fixed after setting;
s206, anchoring and sealing the packer and forming 4 teeth/inch sawtooth left-handed threads, releasing the hand of the pipe column by forward rotation, and pressing the pipe column downwards to realize tie-back;
s207, designing an anchoring releasing-tie-back mechanism and a milling-deblocking structure for the packer structure;
s300, the gas-driven setting method comprises the steps that a gas-driven setting packer presses into a well, the packer is pressurized and set in a pipe column under the condition of a full well casing gas-phase medium, blind plugs are removed, midway testing is carried out, anchoring is released, back plugging is carried out, and a milling and deblocking packer is used, and is characterized in that:
s301, the packers are provided with starting setting pins in different numbers, and starting setting pressure can be changed according to the number of the set different pins;
s302, the setting procedure of the gas-driven packer is pressurized and set in stages, wherein the first stage is pressurized for 15MPa and stabilized for 3 minutes, and the second stage is pressurized for 18MPa and stabilized for 15-20 minutes. In the third stage, 25MPa of pressurization is carried out to cut off blind plugs, and the full drift diameter in the pipe column is recovered;
s303, a packer releasing program driven by gas: lifting and rotating the pipe column (10-12 circles are required for right rotation on the underground anchoring seal), and the lifting tonnage is 3-5 tons, so that the anchoring seal assembly is separated from the packer body;
s304, a secondary tie-back program of the packer driven by gas: when the pipe string is lowered for the second time and the packer is connected back, along with the lowering weight of the pipe string, the thread of the anchoring sealing device is meshed into the thread at the top of the packer, and once the anchoring sealing device is meshed, the anchoring sealing device is safely locked with the packer.
Compared with the prior art, the invention has the following beneficial effects: (1) the designed high-thrust double-hydraulic-cylinder spring power-assisted structure can realize normal setting of the packer under the condition of a gas medium of the whole shaft; (2) the designed inner locking ring mechanism can lock the rubber cylinder, the upper slip and the lower slip in a setting state, so that the rubber cylinder is prevented from sliding when the packer bears pressure, and the sealing performance is ensured; (3) the designed pin shearing type blind plugging mechanism can shear the pin in a continuous pressurizing mode, so that blind plugging is broken, and the full drift diameter of the pipe column is kept.
Drawings
In the drawings:
FIG. 1 is a technical scheme of the method.
FIG. 2 is a diagram of a gas actuated set packer construction.
Wherein: 1 is a drill rod; 2 is an anchoring-releasing mechanism; 3 is a gas-driven setting packer main body; 4 is a milling-deblocking mechanism; and 5, a shear pin type setting blind plug.
Detailed Description
The present invention will be further described with reference to the following embodiments and drawings.
The invention provides a packer driven by gas and a packer setting method, and FIG. 1 is a technical route diagram of the method, and the method comprises the following steps:
s100, packer setting technology under the condition of a full well bore gas phase medium;
s101, a gas-driven packer setting technology is characterized in that: when an oil gas layer is encountered in the drilling process of gas drilling and a midway test is needed, a gas phase medium of a shaft does not need to be replaced by a liquid phase, and after the test is finished, the liquid in the shaft does not need to be replaced by gas again and the shaft is dried.
S200, the gas-driven setting packer comprises an anchoring-releasing mechanism 2, a gas-driven setting packer main body 3, a milling-releasing mechanism 4 and a shear pin type setting blind 5, and the figure 2 is a gas-driven setting packer structure diagram and is characterized in that:
s201, threads are arranged on the upper portion and the lower portion of a gas-driven setting packer main body, the threads at the upper end are connected with anchoring sealing threads, and the anchoring sealing threads are threads of a gas-tight oil pipe;
s202, a hydraulic cylinder pressure transfer hole of a gas-driven packer is designed on a mandrel, the lower end of the packer is connected with a shear pin type setting blind plug, and the packer is directly pressurized without throwing balls during setting;
s203, the packer slip is a telescopic thread slip mechanism, the outer diameter of the slip is smaller than that of the packer body, the vertex angle of a thread tooth is 60 degrees, the slip retracts into the packer body when the drill is put down, and the slip is opened when the drill is set. The packer can be applied to an operation well with pressure, and can be pressed into the well with pressure and drilled down with pressure by rotating a blowout preventer;
s204, the inner diameter of the gas-driven packer is a full drift diameter;
s205, the packer is provided with a special inner locking ring mechanism, and a rubber cylinder, an upper slip and a lower slip are fixed after setting;
s206, anchoring and sealing the packer and forming 4 teeth/inch sawtooth left-handed threads, releasing the hand of the pipe column by forward rotation, and pressing the pipe column downwards to realize tie-back;
s207, designing an anchoring releasing-tie-back mechanism and a milling-deblocking structure for the packer structure;
s300, the gas-driven setting method comprises the steps that a gas-driven setting packer presses into a well, the packer is pressurized and set in a pipe column under the condition of a full well casing gas-phase medium, blind plugs are removed, midway testing is carried out, anchoring is released, back plugging is carried out, and a milling and deblocking packer is used, and is characterized in that:
s301, the packers are provided with starting setting pins in different numbers, and starting setting pressure can be changed according to the number of the set different pins;
s302, the setting procedure of the gas-driven packer is pressurized and set in stages, wherein the first stage is pressurized for 15MPa and stabilized for 3 minutes, and the second stage is pressurized for 18MPa and stabilized for 15-20 minutes. In the third stage, 25MPa of pressurization is carried out to cut off blind plugs, and the full drift diameter in the pipe column is recovered;
s303, a packer releasing program driven by gas: lifting and rotating the pipe column (10-12 circles are required for right rotation on the underground anchoring seal), and the lifting tonnage is 3-5 tons, so that the anchoring seal assembly is separated from the packer body;
s304, a secondary tie-back program of the packer driven by gas: when the pipe string is lowered for the second time and the packer is connected back, along with the lowering weight of the pipe string, the thread of the anchoring sealing device is meshed into the thread at the top of the packer, and once the anchoring sealing device is meshed, the anchoring sealing device is safely locked with the packer.
Compared with the prior art, the invention has the following beneficial effects: (1) the designed high-thrust double-hydraulic-cylinder spring power-assisted structure can realize normal setting of the packer under the condition of a gas medium of the whole shaft; (2) the designed inner locking ring mechanism can lock the rubber cylinder, the upper slip and the lower slip in a setting state, so that the rubber cylinder is prevented from sliding when the packer bears pressure, and the sealing performance is ensured; (3) the designed pin shearing type blind plugging mechanism can shear the pin in a continuous pressurizing mode, so that blind plugging is broken, and the full drift diameter of the pipe column is kept.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (2)
1. A packer driven by gas and a packer setting method are characterized in that:
s100, lean on gas drive' S packer, set up packer main part (3), mill-deblocking mechanism (4), shear pin formula including anchoring-take off the hand mechanism (2), gas drive, set up blind stifled (5), its characterized in that:
s101, threads are arranged on the upper portion and the lower portion of a gas-driven setting packer main body (3), the threads at the upper end are connected with anchoring sealing threads, and the anchoring sealing threads are threads of a gas-tight oil pipe;
s102, a hydraulic cylinder pressure transfer hole of a gas-driven packer is designed on a mandrel, the lower end of the packer is connected with a shear pin type setting blind plug (5), and the packer is directly pressurized without throwing balls during setting;
s103, the packer slip is a telescopic threaded slip mechanism, the outer diameter of the slip is smaller than that of the packer body, the vertex angle of a thread tooth is 60 degrees, the slip retracts into the gas-driven setting packer main body (3) during drilling, and the slip opens during setting; the packer can be applied to an operation well with pressure, and can be pressed into the well with pressure and drilled down with pressure by rotating a blowout preventer;
s104, the inner diameter of the gas-driven packer is a full drift diameter;
s105, the packer is provided with a special inner locking ring mechanism, and a rubber cylinder, an upper slip and a lower slip are fixed after setting;
s106, anchoring and sealing the packer and forming 4 tooth/inch sawtooth left-hand threads, enabling the pipe column to rotate forwards to realize releasing, and pressing down the pipe column to realize tie-back;
s107, an anchoring-releasing mechanism (2) and a milling-releasing structure (4) are designed on the packer structure.
2. A packer driven by gas and a packer setting method are characterized in that:
s200, rely on gas drive' S packer and packer to sit and seal method, including gas drive sits and seals the packer area and press into the well, pressurize in the tubular column under the gaseous medium condition of full well bore section of thick bamboo and sit and seal the packer, beat blind stifled, test midway, the anchoring is taken off the hand, is inserted and is milled the deblocking packer, its characterized in that:
s201, the packers are provided with starting setting pins in different numbers, and starting setting pressure can be changed according to the number of the set different pins;
s202, the setting procedure of the gas-driven packer is pressurized and set in stages, wherein the first stage is pressurized at 15MPa and stabilized for 3 minutes, and the second stage is pressurized at 18MPa and stabilized for 15-20 minutes; in the third stage, 25MPa of pressurization is carried out to cut off blind plugs, and the full drift diameter in the pipe column is recovered;
s203, a packer releasing program driven by gas: lifting and rotating the tubular column rightwards, wherein the underground anchoring seal needs 10-12 circles rightwards, the lifting tonnage is 3-5 tons, and the anchoring seal assembly is separated from the gas-driven setting packer main body (3);
s204, a secondary tie-back program of the packer driven by gas: when the pipe string is lowered for the second time and the packer is connected back, along with the lowering weight of the pipe string, the thread of the anchoring sealing device is meshed into the thread at the top of the packer, and once the anchoring sealing device is meshed, the anchoring sealing device is safely locked with the packer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110651047.4A CN113153207A (en) | 2021-06-11 | 2021-06-11 | Packer driven by gas and packer setting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110651047.4A CN113153207A (en) | 2021-06-11 | 2021-06-11 | Packer driven by gas and packer setting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113153207A true CN113153207A (en) | 2021-07-23 |
Family
ID=76875838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110651047.4A Pending CN113153207A (en) | 2021-06-11 | 2021-06-11 | Packer driven by gas and packer setting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113153207A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO912676D0 (en) * | 1990-07-09 | 1991-07-08 | Baker Hughes Inc | BRIDGE DEVICES. |
| CN2364204Y (en) * | 1999-03-17 | 2000-02-16 | 辽河石油勘探局华油实业公司泵厂 | Vapour pressure drive thermal recovery packer |
| CN1818324A (en) * | 2006-03-01 | 2006-08-16 | 潘昌德 | Compressed high-temperature packer with gas propelling |
| CN2876319Y (en) * | 2005-09-02 | 2007-03-07 | 新疆石油管理局采油工艺研究院 | High pressure drillable bridge plug for preventing middle way seat sealing |
| CN1932429A (en) * | 2006-10-09 | 2007-03-21 | 中国兵器工业第二一三研究所 | Bridge stuffing hard connecting impact type ignitor |
| CN2900772Y (en) * | 2005-09-16 | 2007-05-16 | 潘昌德 | Compression type gas push high temperature packer |
| CA2819350A1 (en) * | 2010-12-17 | 2012-06-21 | Exxonmobil Upstream Research Company | Packer for alternate flow channel gravel packing and method for completing a wellbore |
| CN102587882A (en) * | 2012-03-18 | 2012-07-18 | 荆州市赛瑞能源技术有限公司 | Recoverable once pipe column fracture-acidizing well completion process and tool thereof |
| CN204357424U (en) * | 2014-12-09 | 2015-05-27 | 中国石油集团川庆钻探工程有限公司 | Pressure control type tripping closed tieback opening downhole tool |
| CN110541683A (en) * | 2019-09-29 | 2019-12-06 | 中国石油集团川庆钻探工程有限公司 | High-temperature and high-pressure resistant packer rubber sleeve and novel packer |
| CN110836104A (en) * | 2019-11-28 | 2020-02-25 | 中国石油集团川庆钻探工程有限公司 | Bidirectional slip hydraulic permanent packer |
| WO2020237454A1 (en) * | 2019-05-27 | 2020-12-03 | 成都英诺思科技有限公司 | Cement retainer |
| CN112554838A (en) * | 2020-12-11 | 2021-03-26 | 惟其信石油机械(天津)有限公司 | High-temperature and high-pressure resistant packer |
-
2021
- 2021-06-11 CN CN202110651047.4A patent/CN113153207A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO912676D0 (en) * | 1990-07-09 | 1991-07-08 | Baker Hughes Inc | BRIDGE DEVICES. |
| CN2364204Y (en) * | 1999-03-17 | 2000-02-16 | 辽河石油勘探局华油实业公司泵厂 | Vapour pressure drive thermal recovery packer |
| CN2876319Y (en) * | 2005-09-02 | 2007-03-07 | 新疆石油管理局采油工艺研究院 | High pressure drillable bridge plug for preventing middle way seat sealing |
| CN2900772Y (en) * | 2005-09-16 | 2007-05-16 | 潘昌德 | Compression type gas push high temperature packer |
| CN1818324A (en) * | 2006-03-01 | 2006-08-16 | 潘昌德 | Compressed high-temperature packer with gas propelling |
| CN1932429A (en) * | 2006-10-09 | 2007-03-21 | 中国兵器工业第二一三研究所 | Bridge stuffing hard connecting impact type ignitor |
| CA2819350A1 (en) * | 2010-12-17 | 2012-06-21 | Exxonmobil Upstream Research Company | Packer for alternate flow channel gravel packing and method for completing a wellbore |
| CN102587882A (en) * | 2012-03-18 | 2012-07-18 | 荆州市赛瑞能源技术有限公司 | Recoverable once pipe column fracture-acidizing well completion process and tool thereof |
| CN204357424U (en) * | 2014-12-09 | 2015-05-27 | 中国石油集团川庆钻探工程有限公司 | Pressure control type tripping closed tieback opening downhole tool |
| WO2020237454A1 (en) * | 2019-05-27 | 2020-12-03 | 成都英诺思科技有限公司 | Cement retainer |
| CN110541683A (en) * | 2019-09-29 | 2019-12-06 | 中国石油集团川庆钻探工程有限公司 | High-temperature and high-pressure resistant packer rubber sleeve and novel packer |
| CN110836104A (en) * | 2019-11-28 | 2020-02-25 | 中国石油集团川庆钻探工程有限公司 | Bidirectional slip hydraulic permanent packer |
| CN112554838A (en) * | 2020-12-11 | 2021-03-26 | 惟其信石油机械(天津)有限公司 | High-temperature and high-pressure resistant packer |
Non-Patent Citations (2)
| Title |
|---|
| 卢齐 等: "《永久式封隔器完井技术在龙王庙气藏开发井中的应用》", 《钻采工艺》 * |
| 张道鹏: "《永久式密封锚定完井封隔器》", 《石油机械》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6772839B1 (en) | Method and apparatus for mechanically perforating a well casing or other tubular structure for testing, stimulation or other remedial operations | |
| CN109236189B (en) | Underground reamer while drilling | |
| NO322414B1 (en) | Method of preparing a wellbore | |
| CN104080999B (en) | The method that pressure break is carried out while drilling well | |
| CN112012667B (en) | Oil testing and well completion integrated pipe string combined with fine pressure control technology | |
| CN104121001A (en) | Drilling-free cement injecting device for horizontal well | |
| CN104169514A (en) | Drill bit for use in boring wellbore and subterranean fracturing | |
| US2783026A (en) | Method for fracturing formations | |
| CN101307679A (en) | Thin interlayer steam injection thermal production well mixing-proof well completion process | |
| CN108547589B (en) | Method for producing tubular column without killing well by electric setting recoverable hanging packer | |
| CN116335579B (en) | Oil field well casing packer and non-cementing injection self-plugging staged fracturing method | |
| CN113153207A (en) | Packer driven by gas and packer setting method | |
| CN2888063Y (en) | Integrated bridge plug squeeze cementing tool | |
| US11988055B2 (en) | Controllable downhole drilling and completion tool separating device and their method of use | |
| CN201924878U (en) | Half-cementing well completion pipe string | |
| CN113123721A (en) | Liner drilling assembly for liner drilling | |
| CN114396243B (en) | Gas drilling high-pressure gas well completion method | |
| WO2016008339A1 (en) | Drill-free stage collar of through-bottom type | |
| CN201318157Y (en) | Oil-soluble impervious screen pipe | |
| CN112065296B (en) | Well completion operation method combining fine pressure control technology | |
| CN113073958B (en) | Recyclable bridge plug and using method | |
| CN211974878U (en) | Liner drilling assembly for liner drilling | |
| CN209483253U (en) | Can pressure control continuous cyclic drilling liquid remove drill system | |
| CN101403286A (en) | hydraulic cement umbrella | |
| CN220434732U (en) | Shaft pressure testing device for half-way casing well cementation process |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210723 |
|
| WD01 | Invention patent application deemed withdrawn after publication |