US20120024632A1 - Downhole seal and method of lubricating a downhole tool - Google Patents
Downhole seal and method of lubricating a downhole tool Download PDFInfo
- Publication number
- US20120024632A1 US20120024632A1 US13/191,045 US201113191045A US2012024632A1 US 20120024632 A1 US20120024632 A1 US 20120024632A1 US 201113191045 A US201113191045 A US 201113191045A US 2012024632 A1 US2012024632 A1 US 2012024632A1
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- US
- United States
- Prior art keywords
- downhole
- seal
- lubricant
- shells
- lubricating
- 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
Links
- 230000001050 lubricating effect Effects 0.000 title claims description 9
- 238000000034 method Methods 0.000 title claims description 9
- 239000000314 lubricant Substances 0.000 claims abstract description 25
- 239000011859 microparticle Substances 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000002041 carbon nanotube Substances 0.000 claims description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 4
- 239000002079 double walled nanotube Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 239000002109 single walled nanotube Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229910052582 BN Inorganic materials 0.000 claims description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 2
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical class C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 229910003472 fullerene Inorganic materials 0.000 claims description 2
- 229910021389 graphene Inorganic materials 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000010687 lubricating oil Substances 0.000 claims description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 description 7
- 239000003094 microcapsule Substances 0.000 description 7
- 229920001971 elastomer Polymers 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 239000002105 nanoparticle Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 235000019589 hardness Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/008—Pumps for submersible use, i.e. down-hole pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
- F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
- F04C2/1075—Construction of the stationary member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2230/00—Manufacture
- F04C2230/90—Improving properties of machine parts
- F04C2230/91—Coating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2203/00—Non-metallic inorganic materials
- F05C2203/08—Ceramics; Oxides
- F05C2203/0804—Non-oxide ceramics
Definitions
- Elastomeric parts such as downhole seals, for example, that are used to dynamically seal to other components located within a borehole of an earth formation often have durability issues. These durability issues are often due to wear resulting from frictional engagement between parts. Those who practice in downhole industries would welcome devices and methods to increase the useful life of downhole seals.
- the seal includes a body configured to dynamically seal to a portion of a downhole tool and a lubricant microencapsulated in a plurality of shells to form a plurality of micro particles dispersed within the body.
- the method includes, microencapsulating lubricant within a plurality of shells, distributing the plurality of shells micro encapsulating lubricant within at least one of a first component and a second component that dynamically seal to one another, rupturing at least some of the plurality of shells microencapsulating lubricant, and releasing the lubricant
- FIG. 1 depicts a sectioned view of a portion of a downhole mud motor with a downhole seal disclosed herein employed in the mud motor as a stator having two parts;
- FIG. 2 depicts a sectioned view of a portion of the downhole mud motor of FIG. 1 showing the downhole seal disclosed herein in relation to a rotor;
- FIG. 3 depicts a sectioned view of a mud motor having an alternate downhole seal disclosed herein having a single body
- FIG. 4 depicts a sectioned view of an alternate embodiment of a seal disclosed herein.
- an embodiment of a downhole seal disclosed herein is illustrated generally at 10 as a stator of a motor, such as a mud motor.
- the stator could also be employed in a pump while still remaining within the scope disclosed herein.
- the stator 10 in this embodiment includes, a plurality of parts with a first part 14 A being illustrated as a first layer 14 A and a second part 14 B being illustrated as a second layer, although alternate embodiments may have more layers or as few as one layer.
- the stator 10 is fixedly attached to a housing 16 and allows a rotor 18 engaged therewith to rotate relative thereto in response to fluid flowing between the stator 10 and the rotor 18 .
- This relative motion causes some points along the first layer 14 A of the stator 10 to repeatedly make and break contact with the rotor 18 while at other points the first layer 14 A slides tangentially relative to the rotor 18 .
- Dynamic sealing between the first layer 14 A and the rotor 18 at points of contact and sliding is desirable for improved operation of the motor.
- the repeated contacting and sliding causes wear of the components.
- the first layer 14 A as disclosed herein, is made primarily of an elastomer while the rotor 18 is made of metal. The difference in hardnesses of these materials typically causes the first layer 14 A to wear more quickly than the rotor 18 .
- Lubrication between a surface 28 of the first layer 14 A and a surface 29 of the rotor 18 can increase the useful life of the first layer 14 A, however, fluid flowing between the first layer 14 A and the rotor 18 tends to purge lubrication from the surfaces 28 , and 29 .
- a majority of the first layer 14 A is made of an elastomer 30 .
- embedded in the elastomer 30 is at least one lubricant 34 ; small quantities of which are microencapsulated within shells 38 .
- a multitude of microcapsules 42 filled with the lubricant 34 , are dispersed throughout a volume of the first layer 14 A. In this embodiment, the dispersion is accomplished by mixing the microcapsules 42 in with the elastomeric compound prior to molding the first layer 14 A.
- the lubricant 34 can be introduced as coated micro or nano particles of carbonaceous nanoparticles, for example, with the coating defining the shell 38 .
- the nanoparticles can include, carbon nanotubes (CNT), single-walled carbon nanotubes (SWCNT), double-walled carbon nanotubes (DWCNT), and non-nanotube configurations such as graphenes, fullerenes and diamonds, for example.
- the lubricant could also be molybdenum disulfide, hexagonal boron nitride, polytetrafluoroethylene (PTFE), or graphite.
- the shell 38 is constructed to sufficiently isolate the lubricant 34 from the elastomer 30 during manufacture to minimize degrading the material properties, such as, strength and thermal conductivity, for example, of the first layer 14 A. Yet the shell 38 is fractured when exposed to loads generated as the surfaces 28 , 29 contact and/or slide relative to one another. Upon fracturing of the shell 38 the lubricant 34 is released from the microcapsules 42 and is able to form a lubricating film 46 on one or both of the surfaces 28 and 29 .
- the downhole seal 60 differs from the downhole seal 10 primarily in that the seal 60 is a single body 64 , whereas the seal 10 is made of the first layer 14 A and the second layer 14 B. As such, the seal 60 has the microcapsules 42 of the lubricant 34 dispersed throughout the elastomer 30 of the entire seal 60 .
- the seal 60 may be less expensive to fabricate since it doesn't require assembly of two different portions.
- the seal 10 may have advantages in durability since the second layer 14 B can be made of a material having more robust mechanical properties and fluid chemical resistance while the first layer 14 A is made of material, as described above, that has better friction and wear properties due to the lubricant 34 dispersed therein.
- the mud motor 110 includes, a stator 114 with a contoured surface 118 configured to functionally engage with a complementary surface 122 of a rotor 126 .
- the rotor 126 has two parts, an outer layer 126 A and an inner layer 126 B, with at least the outer layer 126 A including a plurality of the microcapsules 42 .
- Alternate embodiments could have the entirety of the rotor 126 A and 126 B filled with the microcapsules 42 instead of just the outer layer 126 A and the structure could be a single part as opposed to being the two-part configuration illustrated herein.
- stator 114 can also be a single piece structure or a two-piece structure having the inner layer 114 A and the outer layer 114 B as is illustrated in this embodiment.
- the material of the stator 114 can vary with one embodiment being steel with an abrasion resistant coating on the surface 118 .
- the stator 114 is metal the part material configuration is essentially reversed to that of the embodiments illustrated in FIGS. 1 and 3 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Sealing Devices (AREA)
- Lubricants (AREA)
- Earth Drilling (AREA)
- Drilling And Boring (AREA)
- Gasket Seals (AREA)
- Sealing Material Composition (AREA)
Abstract
A downhole seal includes a body configured to dynamically seal to a portion of a downhole tool and a lubricant microencapsulated in a plurality of shells to form a plurality of micro particles dispersed within the body.
Description
- This application is a nonprovisional application of U.S. Provisional Patent Application No. 61/367,976 filed Jul. 27, 2010 and U.S. Provisional Patent Application 61/371,281 filed Aug. 6, 2010, the entire contents of which are incorporated herein by reference.
- Elastomeric parts such as downhole seals, for example, that are used to dynamically seal to other components located within a borehole of an earth formation often have durability issues. These durability issues are often due to wear resulting from frictional engagement between parts. Those who practice in downhole industries would welcome devices and methods to increase the useful life of downhole seals.
- Disclosed herein is a downhole seal. The seal includes a body configured to dynamically seal to a portion of a downhole tool and a lubricant microencapsulated in a plurality of shells to form a plurality of micro particles dispersed within the body.
- Further disclosed herein is a method of lubricating a downhole tool. The method includes, microencapsulating lubricant within a plurality of shells, distributing the plurality of shells micro encapsulating lubricant within at least one of a first component and a second component that dynamically seal to one another, rupturing at least some of the plurality of shells microencapsulating lubricant, and releasing the lubricant
- The following descriptions should not be considered limiting in any way. With reference to the accompanying drawings, like elements are numbered alike:
-
FIG. 1 depicts a sectioned view of a portion of a downhole mud motor with a downhole seal disclosed herein employed in the mud motor as a stator having two parts; -
FIG. 2 depicts a sectioned view of a portion of the downhole mud motor ofFIG. 1 showing the downhole seal disclosed herein in relation to a rotor; -
FIG. 3 depicts a sectioned view of a mud motor having an alternate downhole seal disclosed herein having a single body; and -
FIG. 4 depicts a sectioned view of an alternate embodiment of a seal disclosed herein. - A detailed description of one or more embodiments of the disclosed apparatus and method are presented herein by way of exemplification and not limitation with reference to the Figures.
- Referring to
FIG. 1 , an embodiment of a downhole seal disclosed herein is illustrated generally at 10 as a stator of a motor, such as a mud motor. Alternately, the stator could also be employed in a pump while still remaining within the scope disclosed herein. Thestator 10, in this embodiment includes, a plurality of parts with afirst part 14A being illustrated as afirst layer 14A and asecond part 14B being illustrated as a second layer, although alternate embodiments may have more layers or as few as one layer. Thestator 10 is fixedly attached to ahousing 16 and allows arotor 18 engaged therewith to rotate relative thereto in response to fluid flowing between thestator 10 and therotor 18. Since a number of lobes 22 (5 in the Figure) of thestator 10 is different than a number of lobes 26 (4 in the Figure) of therotor 18, rotation of therotor 18 results in one of thelobes 22 moving sequentially relative to one of thelobes 26 then to another and to another, and so on. This movement defines relative motion between thestator 10 and therotor 18. - This relative motion causes some points along the
first layer 14A of thestator 10 to repeatedly make and break contact with therotor 18 while at other points thefirst layer 14A slides tangentially relative to therotor 18. Dynamic sealing between thefirst layer 14A and therotor 18 at points of contact and sliding is desirable for improved operation of the motor. The repeated contacting and sliding, however, causes wear of the components. Thefirst layer 14A, as disclosed herein, is made primarily of an elastomer while therotor 18 is made of metal. The difference in hardnesses of these materials typically causes thefirst layer 14A to wear more quickly than therotor 18. Lubrication between asurface 28 of thefirst layer 14A and asurface 29 of therotor 18 can increase the useful life of thefirst layer 14A, however, fluid flowing between thefirst layer 14A and therotor 18 tends to purge lubrication from thesurfaces - Referring to
FIG. 2 , a majority of thefirst layer 14A is made of anelastomer 30. In one embodiment, embedded in theelastomer 30 is at least onelubricant 34; small quantities of which are microencapsulated withinshells 38. A multitude ofmicrocapsules 42, filled with thelubricant 34, are dispersed throughout a volume of thefirst layer 14A. In this embodiment, the dispersion is accomplished by mixing themicrocapsules 42 in with the elastomeric compound prior to molding thefirst layer 14A. In alternate embodiments thelubricant 34 can be introduced as coated micro or nano particles of carbonaceous nanoparticles, for example, with the coating defining theshell 38. In such an embodiment the nanoparticles can include, carbon nanotubes (CNT), single-walled carbon nanotubes (SWCNT), double-walled carbon nanotubes (DWCNT), and non-nanotube configurations such as graphenes, fullerenes and diamonds, for example. The lubricant could also be molybdenum disulfide, hexagonal boron nitride, polytetrafluoroethylene (PTFE), or graphite. Regardless of whether thelubricant 34 is solid or fluid, such as a liquid lubricant like oil, theshell 38 is constructed to sufficiently isolate thelubricant 34 from theelastomer 30 during manufacture to minimize degrading the material properties, such as, strength and thermal conductivity, for example, of thefirst layer 14A. Yet theshell 38 is fractured when exposed to loads generated as thesurfaces shell 38 thelubricant 34 is released from themicrocapsules 42 and is able to form alubricating film 46 on one or both of thesurfaces lubricating film 46 is washed away, thesurface 28 wears, andnew microcapsules 42 are exposed to loads that fracture theshells 38 thereby releasing additional quantities of thelubricant 34 thereby slowing the wear rate of thefirst layer 14A. - Referring to
FIG. 3 , an alternate embodiment of a downhole seal disclosed herein is illustrated at 60. Thedownhole seal 60 differs from thedownhole seal 10 primarily in that theseal 60 is asingle body 64, whereas theseal 10 is made of thefirst layer 14A and thesecond layer 14B. As such, theseal 60 has themicrocapsules 42 of thelubricant 34 dispersed throughout theelastomer 30 of theentire seal 60. Each of these two embodiments may have advantages over the other. For example, theseal 60 may be less expensive to fabricate since it doesn't require assembly of two different portions. Alternatively, theseal 10 may have advantages in durability since thesecond layer 14B can be made of a material having more robust mechanical properties and fluid chemical resistance while thefirst layer 14A is made of material, as described above, that has better friction and wear properties due to thelubricant 34 dispersed therein. - Referring to
FIG. 4 , a cross section of an embodiment of a mud motor disclosed herein is illustrated at 110. Themud motor 110 includes, astator 114 with acontoured surface 118 configured to functionally engage with acomplementary surface 122 of a rotor 126. In this embodiment the rotor 126 has two parts, an outer layer 126A and an inner layer 126B, with at least the outer layer 126A including a plurality of themicrocapsules 42. Alternate embodiments could have the entirety of the rotor 126A and 126B filled with themicrocapsules 42 instead of just the outer layer 126A and the structure could be a single part as opposed to being the two-part configuration illustrated herein. Additionally, thestator 114 can also be a single piece structure or a two-piece structure having the inner layer 114A and the outer layer 114B as is illustrated in this embodiment. The material of thestator 114 can vary with one embodiment being steel with an abrasion resistant coating on thesurface 118. In embodiments wherein thestator 114 is metal the part material configuration is essentially reversed to that of the embodiments illustrated inFIGS. 1 and 3 . - While the invention has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the claims. Also, in the drawings and the description, there have been disclosed exemplary embodiments of the invention and, although specific terms may have been employed, they are unless otherwise stated used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention therefore not being so limited. Moreover, the use of the terms first, second, etc. do not denote any order or importance, but rather the terms first, second, etc. are used to distinguish one element from another. Furthermore, the use of the terms a, an, etc. do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.
Claims (13)
1. A downhole seal comprising:
a body configured to dynamically seal to a portion of a downhole tool; and
a lubricant being microencapsulated in a plurality of shells to form a plurality of micro particles dispersed within the body.
2. The downhole seal of claim 1 , wherein the downhole seal is a stator or a rotor of a pump or a mud motor.
3. The downhole seal of claim 1 , wherein the downhole seal is a portion of a stator or a rotor of a pump or a mud motor.
4. The downhole seal of claim 1 , wherein the downhole seal is configured to be fixedly attached within a housing.
5. The downhole seal of claim 4 , wherein the plurality of shells are configured to fracture to thereby release the lubricant therefrom.
6. The downhole seal of claim 1 , wherein the lubricant is selected from the group consisting of, carbon nanotubes (CNT), single-walled carbon nanotubes (SWCNT), double-walled carbon nanotubes (DWCNT), graphenes, fullerenes, diamonds, molybdenum disulfide, hexagonal boron nitride, polytetrafluoroethylene (PTFE), graphite, and liquid lubricants.
7. The downhole seal of claim 1 , wherein the portion of the downhole tool is a rotor or a stator.
8. The downhole seal of claim 1 , wherein the body includes a plurality of parts and only one of the plurality of parts has the plurality of micro particles dispersed therein.
9. The downhole seal of claim 8 , wherein the plurality of parts includes at least two layers.
10. A method of lubricating a downhole tool, comprising
microencapsulating lubricant within a plurality of shells;
distributing the plurality of shells microencapsulating lubricant within at least one of a first component and a second component that dynamically seal to one another;
rupturing at least some of the plurality of shells microencapsulating lubricant; and
releasing the lubricant.
11. The method of lubricating a downhole tool of claim 10 , further comprising wearing at least one of the first component and the second component and rupturing additional shells microencapsulating lubricant.
12. The method of lubricating a downhole tool of claim 10 , further comprising lubricating a surface of at least one of the first component and the second component with the releasing of the lubricant.
13. The method of lubricating a downhole tool of claim 10 , wherein the microencapsulating includes coating.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/191,045 US20120024632A1 (en) | 2010-07-27 | 2011-07-26 | Downhole seal and method of lubricating a downhole tool |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US36797610P | 2010-07-27 | 2010-07-27 | |
US37128110P | 2010-08-06 | 2010-08-06 | |
US13/191,045 US20120024632A1 (en) | 2010-07-27 | 2011-07-26 | Downhole seal and method of lubricating a downhole tool |
Publications (1)
Publication Number | Publication Date |
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US20120024632A1 true US20120024632A1 (en) | 2012-02-02 |
Family
ID=45525576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/191,045 Abandoned US20120024632A1 (en) | 2010-07-27 | 2011-07-26 | Downhole seal and method of lubricating a downhole tool |
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US (1) | US20120024632A1 (en) |
BR (1) | BR112013002004A2 (en) |
CA (1) | CA2806109A1 (en) |
DE (1) | DE112011102497T5 (en) |
GB (1) | GB2496541A (en) |
NO (1) | NO20130119A1 (en) |
WO (1) | WO2012015927A2 (en) |
Cited By (10)
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US20140286808A1 (en) * | 2013-03-22 | 2014-09-25 | Wilhelm Kachele Gmbh | Eccentric Screw Machine |
WO2014182293A1 (en) * | 2013-05-08 | 2014-11-13 | Halliburton Energy Services, Inc. | Insulated conductor for downhole drilling |
WO2014197349A1 (en) * | 2013-06-07 | 2014-12-11 | Halliburton Energy Services, Inc. | Lubricants for oil-based and water-based fluids for use in subterranean formation operations |
WO2015030794A1 (en) * | 2013-08-30 | 2015-03-05 | Halliburton Energy Services, Inc. | High-temperature lubricants comprising elongated carbon nanoparticles for use in subterranean formation operations |
US20160222751A1 (en) * | 2013-11-27 | 2016-08-04 | Halliburton Energy Services, Inc. | Self-Lubricating Seal Element for Rotating Control Device |
CN106014969A (en) * | 2016-07-22 | 2016-10-12 | 潍坊盛德石油机械制造有限公司 | Screw pump/screw drill motor capable of improving lubricating performance |
US9528066B2 (en) | 2013-08-30 | 2016-12-27 | Halliburton Energy Services, Inc. | High-temperature lubricants comprising elongated carbon nanoparticles for use in subterranean formation operations |
US9605526B2 (en) | 2013-11-21 | 2017-03-28 | Halliburton Energy Services, Inc. | Friction and wear reduction of downhole tubulars using graphene |
US10240435B2 (en) | 2013-05-08 | 2019-03-26 | Halliburton Energy Services, Inc. | Electrical generator and electric motor for downhole drilling equipment |
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- 2011-07-27 DE DE112011102497T patent/DE112011102497T5/en not_active Withdrawn
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US20140286808A1 (en) * | 2013-03-22 | 2014-09-25 | Wilhelm Kachele Gmbh | Eccentric Screw Machine |
US9228585B2 (en) * | 2013-03-22 | 2016-01-05 | Wilhelm Kachele Gmbh | Eccentric screw machine with asymmetrical projections |
US10240435B2 (en) | 2013-05-08 | 2019-03-26 | Halliburton Energy Services, Inc. | Electrical generator and electric motor for downhole drilling equipment |
WO2014182293A1 (en) * | 2013-05-08 | 2014-11-13 | Halliburton Energy Services, Inc. | Insulated conductor for downhole drilling |
US9080391B2 (en) | 2013-05-08 | 2015-07-14 | Halliburton Energy Services, Inc. | Insulated conductor for downhole drilling equipment and method |
WO2014197349A1 (en) * | 2013-06-07 | 2014-12-11 | Halliburton Energy Services, Inc. | Lubricants for oil-based and water-based fluids for use in subterranean formation operations |
GB2529572A (en) * | 2013-06-07 | 2016-02-24 | Halliburton Energy Services Inc | Lubricants for oil-based and water-based fluids for use in subterranean formation operations |
WO2015030794A1 (en) * | 2013-08-30 | 2015-03-05 | Halliburton Energy Services, Inc. | High-temperature lubricants comprising elongated carbon nanoparticles for use in subterranean formation operations |
US9493723B2 (en) | 2013-08-30 | 2016-11-15 | Halliburton Energy Services, Inc. | High-temperature lubricants comprising elongated carbon nanoparticles for use in subterranean formation operations |
US9528066B2 (en) | 2013-08-30 | 2016-12-27 | Halliburton Energy Services, Inc. | High-temperature lubricants comprising elongated carbon nanoparticles for use in subterranean formation operations |
GB2533058A (en) * | 2013-08-30 | 2016-06-08 | Halliburton Energy Services Inc | High-temperature lubricants comprising elongated carbon nanoparticles for use in subterranean formation operations |
US9605526B2 (en) | 2013-11-21 | 2017-03-28 | Halliburton Energy Services, Inc. | Friction and wear reduction of downhole tubulars using graphene |
US20160222751A1 (en) * | 2013-11-27 | 2016-08-04 | Halliburton Energy Services, Inc. | Self-Lubricating Seal Element for Rotating Control Device |
CN106014969A (en) * | 2016-07-22 | 2016-10-12 | 潍坊盛德石油机械制造有限公司 | Screw pump/screw drill motor capable of improving lubricating performance |
CN112739627A (en) * | 2018-09-11 | 2021-04-30 | 阿普塔尔法国简易股份公司 | Valve seal and metering valve for fluid product dispenser |
Also Published As
Publication number | Publication date |
---|---|
BR112013002004A2 (en) | 2016-05-31 |
GB2496541A (en) | 2013-05-15 |
NO20130119A1 (en) | 2013-02-20 |
WO2012015927A2 (en) | 2012-02-02 |
DE112011102497T5 (en) | 2013-05-29 |
WO2012015927A3 (en) | 2012-04-05 |
GB201301278D0 (en) | 2013-03-06 |
CA2806109A1 (en) | 2012-02-02 |
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