CN102477844A - Annular-space inflatable underbalanced drilling process - Google Patents
Annular-space inflatable underbalanced drilling process Download PDFInfo
- Publication number
- CN102477844A CN102477844A CN2010105589866A CN201010558986A CN102477844A CN 102477844 A CN102477844 A CN 102477844A CN 2010105589866 A CN2010105589866 A CN 2010105589866A CN 201010558986 A CN201010558986 A CN 201010558986A CN 102477844 A CN102477844 A CN 102477844A
- Authority
- CN
- China
- Prior art keywords
- annular space
- casing
- drilling
- gas
- annular
- 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
Images
Abstract
The invention relates to an annular-space inflatable underbalanced drilling process. Gas is injected into an annular space outside a technical casing. Drilling fluids in a drill pipe and a well below an inflating point are normal, so the use of a mud motor, measurement while drilling (MWD) and other downhole tools are not limited. And meanwhile, the erosion and potential corrosion of gas on the drill pipe and a drill bit are reduced. Since an inflating section is shorter, the required period of adjusting the bottom-hole unerbalanced differential pressure is shorter. The density of the fluid in the drill pipe is higher than that of the fluid in the annular space, so the required power of ground pumping equipment is reduced. According to the invention, a casing by-pass valve is used on the technical casing, and circulating channels between the drill pipe and the inner technical casing annular space as well as inner and outer technical casing annular spaces are built, so that the process flow that the gas injected from the inner and outer technical casing annular spaces returns from the drill pipe and the inner technical casing annular space through the casing valve is realized to achieve the purpose that the underbalanced drilling is realized by injecting the gas into the annular space.
Description
Technical field
Annular space aeration under balance pressure drilling technology is in the oilfield drilling development operation; A kind of employing is from protective casing outer ring space injecting gas; To reduce annular space bottom pressure in the well, the required Negative Pressure Difference of under balance pressure drilling at the bottom of foundation and the control well, the process of realization under balance pressure drilling.
Background technology
Present aeration under-balanced drilling technology; Be in drilling fluid, to charge into gas at well head; Drilling fluid with charge into gas in drilling rod in the process of flowing of down-hole, be mixed into gas-liquid two-phase fluid, through bit nozzle; The entering annular space carries drilling well rock clouds and returns ground, carries out separating of solid phase (rock clouds), liquid phase (drilling fluid) and gas phase (charging into gas) on ground.Potential problem below the under balance pressure drilling technology that adopts full pit shaft drilling fluid to inflate exists.1, because the drilling fluid in the drilling rod is a biphase gas and liquid flow, limited the use of MTR, MWD and some other downhole tool.2, because full well drilling fluid inflation causes the cycle of adjustment shaft bottom underbalance pressure reduction longer.3, gas washing away and potential corrosion for drilling rod, drill bit.4, the fluidised form that in drilling rod, forms is complicated.Adopting annular space aeration under balance pressure drilling technology, is through the outer annular space injecting gas of protective casing.Be normal drilling fluid in the interior well following of drilling rod at this moment, therefore, do not limit for use MTR, MWD and some other downhole tool with inflating point.Reduced gas washing away and potential corrosion simultaneously for drilling rod, drill bit.Because the inflation section is shorter, the cycle of required adjustment shaft bottom underbalance pressure reduction is shorter.Drilling rod inner fluid density is higher than annular fluid density, has reduced the power that required ground pumps into equipment.
Summary of the invention
The present invention is through using casing by-pass valve on protective casing; Set up the circulation canal of drilling rod and internal layer protective casing annular space and inside and outside layer protective casing annular space; Ensured the gas that injects from inside and outside protective casing annular space; Be achieved from the technological process that drilling rod and internal layer protective casing annular space return through casing valve, reached the target that the annular space injecting gas is realized under balance pressure drilling.
The process flow diagram of description of drawings annular space aeration under balance pressure drilling technology is seen Fig. 1.Wherein: 1, drilling rod.2, wellhead blowout preventer.3, internal layer protective casing.4, outer protective casing.5, drilling spool bypass.6, outer protective casing bypass.7, external packer of pipe.8, cement sheath.9, casing by-pass valve.10, go into the well drilling fluid.11, annular space drilling fluid.12, injecting gas.13, gas-liquid-solid three-phase fluid.
The specific embodiment inserts 9 casing by-pass valves and the 7 external packer of pipe position according to design the internal layer protective casing and scurries the lower going-into-well intraocular, carries out normal well cementing operation.After the cementing bruising; Keep well intake pressure to design load; Seat envelope 7 external packer of pipe continue to be pressurized to the design pressure value then earlier, open 9 casing by-pass valves; Set up the annular space of drilling fluid, get into the circulation canal of ground choke manifolds from 6 outer protective casing bypass through 9 casing by-pass valves entering internal layer and outer protective casing.According to the designing requirement of under balance pressure drilling, be lowered to 1 drilling rod, adjust 10 drilling mud performance to underbalance design loads.According to the design injecting gas, in 1 drilling rod, inject drilling fluid according to design from 6 outer protective casing bypass simultaneously, in pit shaft, form stable fluidised form, operation is normally crept in beginning.The underbalance pressure reduction in shaft bottom can be adjusted and control through the gas flow that adjustment is injected from 6 outer protective casing bypass.Closing of 9 casing by-pass valves is that special tool is connected on 1 drilling rod lower end, down to the design well depth, presses down 1 drilling tool and accomplishes.Can choose the right moment and carry out according to the actual conditions of completion practice.
Claims (2)
1. through the annular space injecting gas of internal layer, outer protective casing,, realize the technological process of annular space gas injection under balance pressure drilling through the annular space of casing by-pass valve entering drilling rod and internal layer protective casing.
2. use 9 casing by-pass valves to set up the method that drilling rod and internal layer protective casing annular space are communicated with inside and outside layer protective casing annular space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105589866A CN102477844A (en) | 2010-11-25 | 2010-11-25 | Annular-space inflatable underbalanced drilling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105589866A CN102477844A (en) | 2010-11-25 | 2010-11-25 | Annular-space inflatable underbalanced drilling process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102477844A true CN102477844A (en) | 2012-05-30 |
Family
ID=46090613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105589866A Pending CN102477844A (en) | 2010-11-25 | 2010-11-25 | Annular-space inflatable underbalanced drilling process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102477844A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047559A (en) * | 2014-06-13 | 2014-09-17 | 中国石油集团西部钻探工程有限公司 | Underbalance annulus gas injection joint |
| CN104632111A (en) * | 2014-12-19 | 2015-05-20 | 西南石油大学 | Device and method for transmitting downhole signal through using mud pulse under aerated drilling condition |
| CN106030024A (en) * | 2013-08-08 | 2016-10-12 | 兰德马克绘图国际公司 | Casing joint assembly for producing annulus gas cap |
| CN106837224A (en) * | 2017-02-22 | 2017-06-13 | 中国石油化工股份有限公司 | A kind of removing system of rock salt underground storage underground insoluble matter and its application |
| CN109853571A (en) * | 2019-01-04 | 2019-06-07 | 宁莎莎 | Local air lift reversing port bottom slag cleaning device and method before a kind of cast-in-situ bored pile concrete pouring |
| CN114396243A (en) * | 2022-01-18 | 2022-04-26 | 西南石油大学 | High-pressure gas well completion method for gas drilling |
| CN114718488A (en) * | 2022-04-21 | 2022-07-08 | 西南石油大学 | Jet type gas-liquid mixing device and method for inflating drilling |
-
2010
- 2010-11-25 CN CN2010105589866A patent/CN102477844A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106030024A (en) * | 2013-08-08 | 2016-10-12 | 兰德马克绘图国际公司 | Casing joint assembly for producing annulus gas cap |
| CN104047559A (en) * | 2014-06-13 | 2014-09-17 | 中国石油集团西部钻探工程有限公司 | Underbalance annulus gas injection joint |
| CN104632111A (en) * | 2014-12-19 | 2015-05-20 | 西南石油大学 | Device and method for transmitting downhole signal through using mud pulse under aerated drilling condition |
| CN104632111B (en) * | 2014-12-19 | 2017-02-22 | 西南石油大学 | Device and method for transmitting downhole signal through using mud pulse under aerated drilling condition |
| CN106837224A (en) * | 2017-02-22 | 2017-06-13 | 中国石油化工股份有限公司 | A kind of removing system of rock salt underground storage underground insoluble matter and its application |
| CN109853571A (en) * | 2019-01-04 | 2019-06-07 | 宁莎莎 | Local air lift reversing port bottom slag cleaning device and method before a kind of cast-in-situ bored pile concrete pouring |
| CN109853571B (en) * | 2019-01-04 | 2021-04-30 | 宁莎莎 | Device and method for removing slag at bottom of local gas lift reverse circulation hole before concrete pouring of cast-in-situ bored pile |
| CN114396243A (en) * | 2022-01-18 | 2022-04-26 | 西南石油大学 | High-pressure gas well completion method for gas drilling |
| CN114718488A (en) * | 2022-04-21 | 2022-07-08 | 西南石油大学 | Jet type gas-liquid mixing device and method for inflating drilling |
| CN114718488B (en) * | 2022-04-21 | 2023-06-02 | 西南石油大学 | Jet type gas-liquid mixing device and method for gas-filled drilling |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102477844A (en) | Annular-space inflatable underbalanced drilling process | |
| CN101942962B (en) | Well drilling method of through tubing of gas lift under-balanced coiled tubing | |
| CN103306634B (en) | A kind of Sliding-sleeve-type downhole blow-out preventer and application thereof | |
| CN108825125B (en) | Dynamic variable parameter well killing process method | |
| CN203257353U (en) | Novel pressure control drilled well system | |
| CN105178859B (en) | A kind of self-priming reacting cycle gas drilling system of full well section for oil/gas drilling | |
| CN111155929B (en) | Coal mine underground water hole prevention and control high-water-pressure water jacking directional drilling tool and drilling method | |
| CN110029938B (en) | Gas reverse circulation well drilling method | |
| CN101915059B (en) | Process method for well completion at equal borehole diameter | |
| CN102434135B (en) | Multi-layer discharge and mining device for multiple seam developed area | |
| CN207348834U (en) | One kind extracts and the compound gas production system of foaming water discharge | |
| CN101975041B (en) | Well cementing method for avoiding coal bed and device thereof | |
| CN103835677B (en) | A kind of horizontal well two-stage sealing bruising salvagable completion system | |
| CN205036295U (en) | Full well section is from inhaling anti - recycle gas drilling system of formula | |
| CN201705249U (en) | Continuous jet blockage-removing string for horizontal wells | |
| US10060210B2 (en) | Flow control downhole tool | |
| CN104653157A (en) | Multistage separated-layer water injection pipe column and working method thereof | |
| CN105178897A (en) | Gas drilling ground manifold connecting structure | |
| CN205036331U (en) | Anti - recycle gas well drilling drill tool combination structure | |
| CN106368607B (en) | Implement the method for kill-job using the system for implementing kill-job in deepwater dual gradient drilling | |
| CN103452531A (en) | Method for underbalanced tubing descending, non-well-killing gas lifting, rotary pumping, pump maintaining and tubing maintaining | |
| CN105134114A (en) | Reverse circulation gas drilling tool combination structure | |
| CN104563873A (en) | Downhole casing power guide device | |
| CN205036327U (en) | Gas drilling ground manifold connection structure | |
| CN207960579U (en) | A kind of preset tubing string pneumatic type drainage gas production tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120530 |