US20100147596A1 - Drillable Bit Nozzle Retainer with Interchangeable Nozzle Capability - Google Patents
Drillable Bit Nozzle Retainer with Interchangeable Nozzle Capability Download PDFInfo
- Publication number
- US20100147596A1 US20100147596A1 US12/336,241 US33624108A US2010147596A1 US 20100147596 A1 US20100147596 A1 US 20100147596A1 US 33624108 A US33624108 A US 33624108A US 2010147596 A1 US2010147596 A1 US 2010147596A1
- Authority
- US
- United States
- Prior art keywords
- bit
- nozzle
- housing
- retainer
- nozzle housing
- 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.)
- Abandoned
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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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
Definitions
- the field of the invention is drillable nozzles in bits and more particularly a holder that is softer than the nozzle insert and further has the capability of accepting different nozzle sizes in the field.
- Drill bits typically contain hardened nozzles that circulate fluid to remove the cuttings and bring them to the surface with the circulating mud or other drilling fluid. The circulating fluid also keeps the bit components cool to counteract the heat created from the drilling process.
- Drillable inserts have been used before as illustrated in U.S. Pat. No. 6,848,517 where the assembly of a soft body 3 with a layer of hardened material 5 inside is threaded to the bit at thread 2 .
- the nozzle size 4 a , 4 b is predetermined for a given body 3 .
- a drillable bit nozzle assembly can be used on a casing drilling bit and features a support housing preferably of the same material as the bit crown.
- the housing is preferably attached by welding and contains a groove for a seal and internal threads for an insert retainer.
- a landing shoulder for the hardened inserts allows different sizes to be inserted in the housing and retained by a hardened or carbide ring holder that engages the internal threads.
- the insert and the retainer are sufficiently thin walled to break during mill out while the housing is softer and easily milled out.
- the FIGURE is a part section through the bit body showing the housing secured to the body with an insert held in position by a threaded retainer.
- a portion of the bit 10 is illustrated with a passage 12 into which a housing 14 preferably made from the same material of the crown (not shown) of the bit 10 such as 1018 steel, for example.
- a weld 16 joins the housing 14 to the bit 10 after a shoulder 18 on the housing 14 lands on a mating shoulder 20 formed in passage 12 .
- the housing 14 has an outlet 22 and a seal groove 24 above.
- An o-ring or some other type of seal 26 is inserted into groove 24 after weld 16 is made to secure the position of the housing 14 and the weld 16 is cleaned up, as needed.
- a nozzle 28 having a tapered passage 30 of predetermined dimensions can be dropped in and secured with retainer 32 at thread 34 .
- the nozzle 28 and the retainer 32 are harder than the material for the housing 14 and carbide is the preferred material for both. Carbide for these two items will still mill out easily because the wall thickness of these parts is fairly small causing these parts to fragment and fall apart during milling. Passage 36 in the retainer 32 and the continuation into passage 30 provides a hardened surface against the bulk of the flowing mud or other drilling fluid that passes through while at the same time keeping the bulk of the internal wall of the housing 14 protected from erosive fluid flow.
- a spring loaded bayonet connection can be used to hold the retainer to the housing 14 .
- a J-slot mechanism is another way. The two can be made in an interference fit and simply pressed together or some flexible retainer engaging a groove such as a snap ring can be used. As another option the retainer 32 can be eliminated and the nozzle 28 can be pressed into contact with inner wall such as 42 in an interference fit.
- Nozzle bodies 28 having similar outside dimensions so as to land on shoulder 38 with a flange 40 can be selected with different dimensions for the passage 30 so that the same housing 14 can accommodate drop in inserts 28 that have different flow or pattern characteristics and this can be done in a field location.
- This is to be compared to the prior designs that used a soft body for each nozzle passage size so that changing nozzles in the field required the entire assembly of the soft outer housing and the lined passage of hardened material unique to a given body to all be replaced for every nozzle opening in the bit.
- a housing 14 is secured with a weld 16 to the bit 10 and thereafter an array of different nozzles can be lowered through opening 22 and have a flange 40 that lands on shoulder 38 .
- the same retainer 32 works for every different nozzle 28 that is inserted in housing 14 .
- housing 14 is preferably welded into position at 16 other ways to secure it are contemplated such as an interference fit and pressing in the housing 14 until it shoulders on bit shoulder 20 as one example.
- Groove 24 can be eliminated and a seal can be placed on top of shoulder 38 to reduce production cost for a separate groove 24 .
- a separate seal between the insert 28 and the housing 14 can be eliminated altogether.
Abstract
A drillable bit nozzle assembly can be used on a casing drilling bit and features a support housing preferably of the same material as the bit crown. The housing is preferably attached by welding and contains a groove for a seal and internal threads for an insert retainer. A landing shoulder for the hardened inserts allows different sizes to be inserted in the housing and retained by a hardened or carbide ring holder that engages the internal threads. The insert and the retainer are sufficiently thin walled to break during mill out while the housing is softer and easily milled out.
Description
- The field of the invention is drillable nozzles in bits and more particularly a holder that is softer than the nozzle insert and further has the capability of accepting different nozzle sizes in the field.
- In some applications the bit is not recovered to the surface and must be drilled out to further extend a well. One example of such an application is a bit secured to the lower end of a casing string and the string is advanced as more hole is made. To extend the well further after the casing is delivered, the bit at the bottom of the casing needs to be removed, usually by drilling out. Drill bits typically contain hardened nozzles that circulate fluid to remove the cuttings and bring them to the surface with the circulating mud or other drilling fluid. The circulating fluid also keeps the bit components cool to counteract the heat created from the drilling process.
- Drillable inserts have been used before as illustrated in U.S. Pat. No. 6,848,517 where the assembly of a soft body 3 with a layer of hardened material 5 inside is threaded to the bit at thread 2. The nozzle size 4 a, 4 b is predetermined for a given body 3. There are similar designs that use a different nozzle size for a given body of a softer exterior and a passage lined with a hardened material but instead secure the assembly to the bit with a snap ring. Examples of this design with the snap ring identified in brackets are U.S. Pat. No. 3,111,179 (16); 4,392,534 (6) and 2,855,182 (11), note this reference has no hardened liner.
- What is lacking and provided by the present invention is a holder preferably compatible with the bit crown material that can accommodate a variety of nozzle sizes to avoid having to keep an inventory of different nozzle sizes in similar sized bodies. An easier way of attaching the holder is also provided. Those skilled in the art will better understand the invention from a review of the description of the preferred embodiment and the associated FIGURE while understanding that the claims, including their literal and equivalent scope, are the full measure of the invention.
- A drillable bit nozzle assembly can be used on a casing drilling bit and features a support housing preferably of the same material as the bit crown. The housing is preferably attached by welding and contains a groove for a seal and internal threads for an insert retainer. A landing shoulder for the hardened inserts allows different sizes to be inserted in the housing and retained by a hardened or carbide ring holder that engages the internal threads. The insert and the retainer are sufficiently thin walled to break during mill out while the housing is softer and easily milled out.
- The FIGURE is a part section through the bit body showing the housing secured to the body with an insert held in position by a threaded retainer.
- A portion of the
bit 10 is illustrated with apassage 12 into which ahousing 14 preferably made from the same material of the crown (not shown) of thebit 10 such as 1018 steel, for example. Aweld 16 joins thehousing 14 to thebit 10 after ashoulder 18 on thehousing 14 lands on amating shoulder 20 formed inpassage 12. Thehousing 14 has anoutlet 22 and aseal groove 24 above. An o-ring or some other type ofseal 26 is inserted intogroove 24 afterweld 16 is made to secure the position of thehousing 14 and theweld 16 is cleaned up, as needed. Afterseal 26 is in groove 24 anozzle 28 having atapered passage 30 of predetermined dimensions can be dropped in and secured withretainer 32 atthread 34. Thenozzle 28 and theretainer 32 are harder than the material for thehousing 14 and carbide is the preferred material for both. Carbide for these two items will still mill out easily because the wall thickness of these parts is fairly small causing these parts to fragment and fall apart during milling.Passage 36 in theretainer 32 and the continuation intopassage 30 provides a hardened surface against the bulk of the flowing mud or other drilling fluid that passes through while at the same time keeping the bulk of the internal wall of thehousing 14 protected from erosive fluid flow. - Those skilled in the art will appreciate that while the preferred mode of securing the
retainer 32 isthreads 34 that other ways of fixating theretainer 32 are contemplated. A spring loaded bayonet connection can be used to hold the retainer to thehousing 14. A J-slot mechanism is another way. The two can be made in an interference fit and simply pressed together or some flexible retainer engaging a groove such as a snap ring can be used. As another option theretainer 32 can be eliminated and thenozzle 28 can be pressed into contact with inner wall such as 42 in an interference fit. -
Nozzle bodies 28 having similar outside dimensions so as to land onshoulder 38 with aflange 40 can be selected with different dimensions for thepassage 30 so that thesame housing 14 can accommodate drop ininserts 28 that have different flow or pattern characteristics and this can be done in a field location. This is to be compared to the prior designs that used a soft body for each nozzle passage size so that changing nozzles in the field required the entire assembly of the soft outer housing and the lined passage of hardened material unique to a given body to all be replaced for every nozzle opening in the bit. As illustrated in the FIGURE with the present invention ahousing 14 is secured with aweld 16 to thebit 10 and thereafter an array of different nozzles can be lowered through opening 22 and have aflange 40 that lands onshoulder 38. Thesame retainer 32 works for everydifferent nozzle 28 that is inserted inhousing 14. - While
housing 14 is preferably welded into position at 16 other ways to secure it are contemplated such as an interference fit and pressing in thehousing 14 until it shoulders onbit shoulder 20 as one example. Groove 24 can be eliminated and a seal can be placed on top ofshoulder 38 to reduce production cost for aseparate groove 24. Optionally, a separate seal between theinsert 28 and thehousing 14 can be eliminated altogether. - While the preferred embodiment has been set forth above, those skilled in art will appreciate that the scope of the invention is significantly broader and as outlined in the claims which appear below.
Claims (18)
1. A downhole drill bit with a drillable nozzle assembly, comprising:
a body having at least one passage;
at least one nozzle housing in said passage, said housing accepting one of a plurality of nozzle bodies that have differing flow paths therethrough.
2. The bit of claim 1 , wherein:
said nozzle housing is made of a softer material than said nozzle body.
3. The bit of claim 1 , wherein:
said nozzle housing is welded to said passage
4. The bit of claim 1 , wherein:
said passage comprises a landing shoulder and said nozzle housing has a radial surface that lands on said shoulder to locate said nozzle housing in said passage.
5. The bit of claim 1 , wherein:
said nozzle housing further comprises an internal landing shoulder;
said nozzle bodies are all adapted to land on said shoulder.
6. The bit of claim 5 , further comprising:
a retainer removably mounted within said nozzle housing to secure a nozzle body to said shoulder.
7. The bit of claim 6 , wherein:
said retainer is made of the same material as said nozzle body.
8. The bit of claim 6 , wherein:
said retainer is held by threads.
9. The bit of claim 6 , further comprising:
an outlet opening in said nozzle housing, all of said nozzle bodies configured to extend through said outlet opening when landed on said shoulder;
a seal between said mounted nozzle body and said nozzle housing.
10. The bit of claim 6 , wherein:
said nozzle bodies comprise an exterior flange located on an end thereof having an outer dimension that allows landing on said shoulder.
11. The bit of claim 10 , wherein:
said retainer and said nozzle bodies are made of carbide.
12. The bit of claim 1 , wherein:
said nozzle body is held to said nozzle housing by an interference fit.
13. The bit of claim 1 , wherein:
said nozzle housing is held to said body by an interference fit.
14. The bit of claim 6 , wherein:
said retainer is held to said nozzle housing by an interference fit.
15. The bit of claim 6 , wherein:
said retainer comprises a ring shape with a through passage aligned with the flow path of a nozzle body that it secures.
16. The bit of claim 15 , wherein:
said ring has an exterior thread for engagement to said nozzle housing.
17. The bit of claim 15 , wherein:
said ring is retained to said nozzle housing with a snap ring.
18. The bit of claim 15 , wherein:
said ring is retained to said nozzle housing with a pin and slot assembly.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/336,241 US20100147596A1 (en) | 2008-12-16 | 2008-12-16 | Drillable Bit Nozzle Retainer with Interchangeable Nozzle Capability |
PCT/US2009/067966 WO2010077838A2 (en) | 2008-12-16 | 2009-12-15 | Drillable bit nozzle retainer with interchangeable nozzle capability |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/336,241 US20100147596A1 (en) | 2008-12-16 | 2008-12-16 | Drillable Bit Nozzle Retainer with Interchangeable Nozzle Capability |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100147596A1 true US20100147596A1 (en) | 2010-06-17 |
Family
ID=42239187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/336,241 Abandoned US20100147596A1 (en) | 2008-12-16 | 2008-12-16 | Drillable Bit Nozzle Retainer with Interchangeable Nozzle Capability |
Country Status (2)
Country | Link |
---|---|
US (1) | US20100147596A1 (en) |
WO (1) | WO2010077838A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140216823A1 (en) * | 2013-02-01 | 2014-08-07 | Varel Europe S.A.S. | Non-cylindrical nozzle socket for drill bits |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2022210285A1 (en) | 2021-01-20 | 2023-08-10 | Baker Hughes Oilfield Operations Llc | Removable nozzle for a downhole valve |
AU2022220598A1 (en) * | 2021-02-11 | 2023-09-07 | Baker Hughes Oilfield Operations Llc | Fully shrouded nozzle removed by shear |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3220754A (en) * | 1963-08-26 | 1965-11-30 | Christensen Diamond Prod Co | Replaceable drill bit nozzles |
US3826789A (en) * | 1971-12-09 | 1974-07-30 | Fujikura Ltd | Process for producing hydrocarbon composition |
US4082015A (en) * | 1976-01-30 | 1978-04-04 | Dresser Industries, Inc. | Removable drill bit nozzle |
US4603750A (en) * | 1984-10-02 | 1986-08-05 | Hughes Tool Company - Usa | Replaceable bit nozzle |
US4687067A (en) * | 1986-05-01 | 1987-08-18 | Smith International, Inc. | Crossflow rotary cone rock bit with extended nozzles |
US4711311A (en) * | 1986-11-20 | 1987-12-08 | Smith International, Inc. | Vibration and erosion resistant nozzle |
US4793426A (en) * | 1986-11-26 | 1988-12-27 | Millsapps Jr Stuart C | Drill bit with covered ring nozzle retainer |
US6290006B1 (en) * | 1998-09-29 | 2001-09-18 | Halliburton Engrey Service Inc. | Apparatus and method for a roller bit using collimated jets sweeping separate bottom-hole tracks |
US7188682B2 (en) * | 2000-12-14 | 2007-03-13 | Smith International, Inc. | Multi-stage diffuser nozzle |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE8605202D0 (en) * | 1986-01-31 | 1986-12-03 | Hughes Tool Co | MOUNTAIN DRILL CHRONICLE WITH DIRECT, SWEATING NOZZLE |
-
2008
- 2008-12-16 US US12/336,241 patent/US20100147596A1/en not_active Abandoned
-
2009
- 2009-12-15 WO PCT/US2009/067966 patent/WO2010077838A2/en active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3220754A (en) * | 1963-08-26 | 1965-11-30 | Christensen Diamond Prod Co | Replaceable drill bit nozzles |
US3826789A (en) * | 1971-12-09 | 1974-07-30 | Fujikura Ltd | Process for producing hydrocarbon composition |
US4082015A (en) * | 1976-01-30 | 1978-04-04 | Dresser Industries, Inc. | Removable drill bit nozzle |
US4603750A (en) * | 1984-10-02 | 1986-08-05 | Hughes Tool Company - Usa | Replaceable bit nozzle |
US4687067A (en) * | 1986-05-01 | 1987-08-18 | Smith International, Inc. | Crossflow rotary cone rock bit with extended nozzles |
US4711311A (en) * | 1986-11-20 | 1987-12-08 | Smith International, Inc. | Vibration and erosion resistant nozzle |
US4793426A (en) * | 1986-11-26 | 1988-12-27 | Millsapps Jr Stuart C | Drill bit with covered ring nozzle retainer |
US6290006B1 (en) * | 1998-09-29 | 2001-09-18 | Halliburton Engrey Service Inc. | Apparatus and method for a roller bit using collimated jets sweeping separate bottom-hole tracks |
US7188682B2 (en) * | 2000-12-14 | 2007-03-13 | Smith International, Inc. | Multi-stage diffuser nozzle |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140216823A1 (en) * | 2013-02-01 | 2014-08-07 | Varel Europe S.A.S. | Non-cylindrical nozzle socket for drill bits |
Also Published As
Publication number | Publication date |
---|---|
WO2010077838A2 (en) | 2010-07-08 |
WO2010077838A3 (en) | 2010-09-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BAKER HUGHES INCORPORATED,TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MCCLAIN, ERIC E.;REEL/FRAME:022301/0587 Effective date: 20090105 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |