CN204386475U - A kind of double-wall drill pipe counterflush drilling jet pump drill bit - Google Patents
A kind of double-wall drill pipe counterflush drilling jet pump drill bit Download PDFInfo
- Publication number
- CN204386475U CN204386475U CN201420649290.8U CN201420649290U CN204386475U CN 204386475 U CN204386475 U CN 204386475U CN 201420649290 U CN201420649290 U CN 201420649290U CN 204386475 U CN204386475 U CN 204386475U
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- drill bit
- double
- pipe
- outer tube
- landwaste
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Abstract
The utility model discloses a kind of double-wall drill pipe counterflush drilling jet pump drill bit, it is characterized in that comprising double-walled drill bit, and the two-tube runner of the bridge-type being arranged on double-walled drill bit internal, jet pump, sand flushing device.The two-tube runner of described bridge-type replaces the flow transition joint on Bottom Hole Assembly (BHA) top in double-wall drill pipe counterflush drilling, achieve drilling fluid and landwaste directly to enter in double-wall drill pipe from the landwaste suction pipe of double-wall drill pipe counterflush drilling jet pump drill bit and manage, thus improve the clear rock efficiency in shaft bottom; Described jet pump suction well fluids downhole, reduces bottom hole pressure difference, and impel shaft bottom landwaste to depart from shaft bottom on the one hand and accelerate to return, at the bottom of winding shaft, clear rock efficiency, on the other hand, realizes underbalance and improve rate of penetration.
Description
Technical field
The utility model belongs to drilling well and oil gas engineering field, is specifically related to a kind of double-wall drill pipe counterflush drilling jet pump drill bit.
Background technology
Double-wall drill pipe counterflush drilling (Reel Well drilling well) technology is a new drilling technology, it is based on double-wall drill pipe, drilling fluid pumps in well and bottom-hole cleaning from double-wall drill pipe annular space, and from inner drill rods, cutting carring returns to ground, thus realizes drilling fluid closed loop cycle.Double-wall drill pipe counterflush drilling technology puts forward to solve well cleaning problem in continuous-tube drilling well at first.Since double-wall drill pipe counterflush drilling technology created from 2004, theoretical research, the research and development of corollary equipment and test are carried out primarily of Den Norske Stats Oljeselskap a.s. (Statoil Group), Science Research Council of Norway.Within 2005, start to launch feasibility analysis and investigation to double-wall drill pipe counterflush drilling technology; Within 2006, complete research and development and the test of crucial corollary equipment, the same year, Shell company also added the research to this technology; Full-scale model was investigated on " Ullrigg " rig in 2007; Within 2008, physical device is tested on " Ullrigg " rig; The probing having carried out test well for 2009 by land with sea is tested and obtains successfully; OTC meeting in 2013 is proposed double-wall drill pipe reacting cycle without marine riser boring method.Double-wall drill pipe counterflush drilling technology managed pressure drilling, extended reach well drilling, deepwater drilling and have the challenging stratum of pressure creep in there is great advantage, mainly there is following features: (1) drilling fluid reacting cycle in tube-in-tube, realize without marine riser drilling well; (2) double-wall drill pipe serves as electric power and data transmission channel; (3) overall process controlled pressure drilling is realized.But due in drilling process, drilling fluid enters in double-wall drill pipe from the flow transition joint on Bottom Hole Assembly (BHA) top to manage, flow direction changes suddenly, make shaft bottom landwaste on return efficiency reduce, shaft bottom landwaste can not get timely cleaning, thus cause the repetition of part landwaste broken, affect efficiency of breaking rock.
Summary of the invention
The purpose of this utility model is to provide a kind of double-wall drill pipe counterflush drilling jet pump drill bit, by the two-tube runner of the bridge-type of double-walled drill bit internal, realizes drilling fluid and directly enters pipe in double-wall drill pipe from drill bit, improve the clear rock efficiency in shaft bottom; Aspirate well fluids downhole by jet pump, reduce bottom hole pressure difference, impel shaft bottom landwaste to depart from shaft bottom on the one hand and accelerate to return, at the bottom of winding shaft, clear rock efficiency, on the other hand, realizes underbalance and improves rate of penetration.
For achieving the above object, the technical scheme that adopts of the utility model is as follows:
A kind of double-wall drill pipe counterflush drilling jet pump drill bit, comprises double-walled drill bit, and the two-tube runner of the bridge-type being arranged on double-walled drill bit internal, jet pump, sand flushing device.
Double-walled drill bit comprises outer tube joint, inner pipe joint, outer tube, interior pipe, drill bit; Outer tube joint is connected with outer tube, and outer tube is connected with drill bit; Inner pipe joint is connected with interior pipe, and interior pipe is connected with drill bit, and inner pipe joint and interior pipe are positioned at outer tube joint and outer tube; Outer tube joint, inner pipe joint, outer tube, interior pipe, drill bit are as a whole; Double-walled drill bit is the working portion of double-wall drill pipe counterflush drilling jet pump bit cutting rock.
The two-tube runner of bridge-type comprises annular space, flow transition runner, pressure chamber, landwaste suction pipe; Annular space is managed between outer tube in described, and annular space is communicated with pressure chamber by flow transition runner; Landwaste suction pipe and flow transition runner arranged in a crossed manner, run through described outer tube and interior pipe; Landwaste suction pipe outer end is connected with the outer wall of drill bit; The two-tube runner of bridge-type replaces the flow transition joint on Bottom Hole Assembly (BHA) top in double-wall drill pipe counterflush drilling, achieve drilling fluid and landwaste directly to enter in double-wall drill pipe from the landwaste suction pipe of double-wall drill pipe counterflush drilling jet pump drill bit and manage, thus substantially increase the clear rock efficiency in shaft bottom.
Jet pump comprises on backward jet nozzle, suction chamber, trunnion, anemostat, drilling fluid and backflowing; Backward jet nozzle entrance is communicated with described pressure chamber, and the outlet of backward jet nozzle is positioned at suction chamber; Suction chamber and trunnion are docked and connected, and the side of suction chamber is connected with the inner of landwaste suction pipe; Trunnion and anemostat are docked and connected; Anemostat and drilling fluid backflow and is docked and connected; Suction chamber, trunnion, anemostat, drilling fluid backflow and is all contained in described interior pipe; Jet pump realizes underbalance, improves the key mechanism of the clear rock efficiency in shaft bottom and rate of penetration.
Sand flushing device comprises shaft bottom landwaste and stirs and cleaning runner, bit nozzle; Shaft bottom landwaste stirs and is communicated with described pressure chamber with the entrance of cleaning runner, and shaft bottom landwaste stirs and cleaning runner exit place is provided with bit nozzle; Bit nozzle and backward jet nozzle are oppositely arranged, and bit nozzle outlet is connected with drill bit end.
In sum, compared with prior art, the utility model has following good result:
(1) the two-tube runner of bridge-type of the present utility model, instead of the flow transition joint on Bottom Hole Assembly (BHA) top in double-wall drill pipe counterflush drilling, realize drilling fluid and landwaste directly to enter in double-wall drill pipe from drill bit and manage, shaft bottom landwaste is eliminated in time, improves the clear rock efficiency in shaft bottom.
(2) jet pump suction well fluids downhole of the present utility model, reduces bottom hole pressure difference, and impel shaft bottom landwaste to depart from shaft bottom on the one hand and accelerate to return, at the bottom of winding shaft, clear rock efficiency, on the other hand, realizes underbalance and improve rate of penetration.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of double-wall drill pipe counterflush drilling jet pump drill bit;
Fig. 2 is that double-wall drill pipe counterflush drilling jet pump drill bit is along Fig. 1 schematic top plan view;
Fig. 3 is the cross-sectional schematic of double-wall drill pipe counterflush drilling jet pump drill bit along A-A in Fig. 1;
Fig. 4 is the cross-sectional schematic of double-wall drill pipe counterflush drilling jet pump drill bit along B-B in Fig. 1;
Fig. 5 is the backward jet nozzle schematic diagram of double-wall drill pipe counterflush drilling jet pump drill bit;
Fig. 6 is the bit nozzle schematic diagram of double-wall drill pipe counterflush drilling jet pump drill bit.
In figure: 1, double-walled drill bit, 2, the two-tube runner of bridge-type, 3, jet pump, 4, sand flushing device; 101, outer tube joint, 102, inner pipe joint, 103, outer tube, 104, interior pipe, 105, drill bit; 201, annular space, 202, flow transition runner, 203, pressure chamber, 204, landwaste suction pipe; 301, backward jet nozzle, 302, suction chamber, 303, trunnion, 304, anemostat, 305, drilling fluid backflows; 401, shaft bottom landwaste stirs and cleaning runner, and 402, bit nozzle.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention, structure, feature and the effect thereof that the utility model proposes are described, are described in detail as follows:
A kind of double-wall drill pipe counterflush drilling jet pump drill bit, comprises double-walled drill bit 1 and is arranged on the two-tube runner 2 of bridge-type, jet pump 3, the sand flushing device 4 of double-walled drill bit internal.
Double-walled drill bit 1 comprises outer tube joint 101, inner pipe joint 102, outer tube 103, interior pipe 104, drill bit 105; Outer tube joint 101 is connected with outer tube 103, and outer tube 103 is connected with drill bit 105; Inner pipe joint 102 is connected with interior pipe 104, and interior pipe 104 is connected with drill bit 105, and inner pipe joint 102 and interior pipe 104 are positioned at outer tube joint 101 and outer tube 103 is inner; Outer tube joint 101, inner pipe joint 102, outer tube 103, interior pipe 104, drill bit 105 are as a whole; Double-walled drill bit 1 is the working portion of double-wall drill pipe counterflush drilling jet pump bit cutting rock.
The two-tube runner 2 of bridge-type comprises annular space 201, flow transition runner 202, pressure chamber 203, landwaste suction pipe 204; Annular space 201 is in described between pipe 104 and outer tube 103, and annular space 201 is communicated with pressure chamber 203 by flow transition runner 202; Landwaste suction pipe 204 is arranged in a crossed manner with flow transition runner 202, runs through described outer tube 103 and interior pipe 104; Landwaste suction pipe 204 outer end is connected with the outer wall of drill bit 105; The two-tube runner 2 of bridge-type replaces the flow transition joint on Bottom Hole Assembly (BHA) top in double-wall drill pipe counterflush drilling, achieve drilling fluid and landwaste directly to enter in double-wall drill pipe from the landwaste suction pipe 204 of double-wall drill pipe counterflush drilling jet pump drill bit and manage, thus substantially increase the clear rock efficiency in shaft bottom.
Jet pump 3 comprises on backward jet nozzle 301, suction chamber 302, trunnion 303, anemostat 304, drilling fluid and backflows 305; Backward jet nozzle 301 entrance is communicated with described pressure chamber 203, and the outlet of backward jet nozzle 301 is positioned at suction chamber 302; Suction chamber 302 and trunnion 303 are docked and connected, and the side of suction chamber 302 is connected with the inner of landwaste suction pipe 204; Trunnion 303 and anemostat 304 are docked and connected; Anemostat 304 and drilling fluid backflow and 305 to be docked and connected; Suction chamber 302, trunnion 303, anemostat 304, drilling fluid backflow and 305 is all contained in described interior pipe 104; Jet pump 3 realizes underbalance, improves the key mechanism of the clear rock efficiency in shaft bottom and rate of penetration.
Sand flushing device 4 comprises shaft bottom landwaste and stirs and cleaning runner 401, bit nozzle 402; Shaft bottom landwaste stirs and is communicated with described pressure chamber 203 with the entrance of cleaning runner 401, and shaft bottom landwaste stirs and cleaning runner 401 exit is provided with bit nozzle 402; Bit nozzle 402 and backward jet nozzle 301 are oppositely arranged, and bit nozzle 402 outlet is connected with drill bit 105 end, and bit nozzle 402 quantity is determined according to drill bit structure.
The course of work of double-wall drill pipe counterflush drilling jet pump drill bit of the present utility model is as follows:
In drilling process, double-wall drill pipe counterflush drilling jet pump bit, rock cutting produces landwaste.Simultaneously the outer tube joint 101 of double-walled drill bit 1 and inner pipe joint 102 connect the outer tube of double-wall drill pipe and interior pipe respectively, cleaner for high-pressure drilling fluid is entered by the annular space 201 between outer tube 103 and interior pipe 104, then enters pressure chamber 203 by the flow transition runner 202 of the two-tube runner 2 of bridge-type.A cleaner for high-pressure drilling fluid part in pressure chamber 203 is sprayed by backward jet nozzle 301, form high-speed jet, high-speed jet produces negative pressure in suction chamber 302, negative pressure is aspirated by landwaste suction pipe 204 pairs of well fluids downhole and landwaste, thus reduction bottom hole pressure difference, reduce the chip hold down effect of landwaste, create the insufficient balance condition in shaft bottom, improve rate of penetration.The shaft bottom landwaste that another part drilling fluid enters sand flushing device 4 stirs with in cleaning runner 401, is then sprayed by bit nozzle 402.Shaft bottom landwaste is impacted into the turbulent flow of high concentration by the asymmetric high-speed jet that bit nozzle 402 sprays, and shaft bottom landwaste is efficiently sucked in suction chamber 302 under the castering action of shaft bottom drilling fluid with under the swabbing action of landwaste suction pipe 301.The backward jet nozzle ejection high-speed jet of jet pump 3, produce negative pressure at suction chamber 302 and entrainment landwaste and drilling fluid, shaft bottom landwaste and drilling fluid are imported high-speed jet at suction chamber 302 and trunnion 303 place, then the landwaste in jet and drilling fluid mixed thing enter anemostat 304 by trunnion 303, in anemostat 304, the kinetic energy part of jet converts pressure energy to, enters on drilling fluid and backflow 305 after its speed lowers.
Claims (1)
1. a double-wall drill pipe counterflush drilling jet pump drill bit, is characterized in that comprising double-walled drill bit, and the two-tube runner of the bridge-type being arranged on double-walled drill bit internal, jet pump, sand flushing device;
Described double-walled drill bit comprises outer tube joint, inner pipe joint, outer tube, interior pipe, drill bit; Outer tube joint is connected with outer tube, and outer tube is connected with drill bit; Inner pipe joint is connected with interior pipe, and interior pipe is connected with drill bit, and inner pipe joint and interior pipe are positioned at outer tube joint and outer tube; Outer tube joint, inner pipe joint, outer tube, interior pipe, drill bit are as a whole;
The two-tube runner of described bridge-type comprises annular space, flow transition runner, pressure chamber, landwaste suction pipe; Annular space is managed between outer tube in described, and annular space is communicated with pressure chamber by flow transition runner; Landwaste suction pipe and flow transition runner arranged in a crossed manner, run through described outer tube and interior pipe; Landwaste suction pipe outer end is connected with the outer wall of drill bit;
Described jet pump comprises on backward jet nozzle, suction chamber, trunnion, anemostat, drilling fluid and backflowing; Backward jet nozzle entrance is communicated with described pressure chamber, and the outlet of backward jet nozzle is positioned at suction chamber; Suction chamber and trunnion are docked and connected, and the side of suction chamber is connected with the inner of landwaste suction pipe; Trunnion and anemostat are docked and connected; Anemostat and drilling fluid backflow and is docked and connected; Suction chamber, trunnion, anemostat, drilling fluid backflow and is all contained in described interior pipe;
Described sand flushing device comprises shaft bottom landwaste and stirs and cleaning runner, bit nozzle; Shaft bottom landwaste stirs and is communicated with described pressure chamber with the entrance of cleaning runner, and shaft bottom landwaste stirs and cleaning runner exit place is provided with bit nozzle; Bit nozzle and backward jet nozzle are oppositely arranged, and bit nozzle outlet is connected with drill bit end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420649290.8U CN204386475U (en) | 2014-11-03 | 2014-11-03 | A kind of double-wall drill pipe counterflush drilling jet pump drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420649290.8U CN204386475U (en) | 2014-11-03 | 2014-11-03 | A kind of double-wall drill pipe counterflush drilling jet pump drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204386475U true CN204386475U (en) | 2015-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420649290.8U Expired - Fee Related CN204386475U (en) | 2014-11-03 | 2014-11-03 | A kind of double-wall drill pipe counterflush drilling jet pump drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204386475U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10975664B2 (en) | 2018-08-17 | 2021-04-13 | Ancor-Loc (Nz) Limited | Well or bore clearing tool |
-
2014
- 2014-11-03 CN CN201420649290.8U patent/CN204386475U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10975664B2 (en) | 2018-08-17 | 2021-04-13 | Ancor-Loc (Nz) Limited | Well or bore clearing tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150610 Termination date: 20161103 |