GB2027817A – Reduction in wear of contacting surfaces
– Google Patents
GB2027817A – Reduction in wear of contacting surfaces
– Google Patents
Reduction in wear of contacting surfaces
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Info
Publication number
GB2027817A
GB2027817A
GB7927445A
GB7927445A
GB2027817A
GB 2027817 A
GB2027817 A
GB 2027817A
GB 7927445 A
GB7927445 A
GB 7927445A
GB 7927445 A
GB7927445 A
GB 7927445A
GB 2027817 A
GB2027817 A
GB 2027817A
Authority
GB
United Kingdom
Prior art keywords
diamonded
friction device
concretions
diamond
bearings
Prior art date
1978-08-11
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.)
Granted
Application number
GB7927445A
Other versions
GB2027817B
(en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Total Compagnie Francaise des Petroles SA
Original Assignee
Compagnie Francaise des Petroles SA
Priority date (The priority date 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 date listed.)
1978-08-11
Filing date
1979-08-07
Publication date
1980-02-27
1979-08-07
Application filed by Compagnie Francaise des Petroles SA
filed
Critical
Compagnie Francaise des Petroles SA
1980-02-27
Publication of GB2027817A
publication
Critical
patent/GB2027817A/en
1982-08-11
Application granted
granted
Critical
1982-08-11
Publication of GB2027817B
publication
Critical
patent/GB2027817B/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
F16C33/02—Parts of sliding-contact bearings
F16C33/04—Brasses; Bushes; Linings
F16C33/24—Brasses; Bushes; Linings with different areas of the sliding surface consisting of different materials
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
E21B4/00—Drives for drilling, used in the borehole
E21B4/02—Fluid rotary type drives
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
F16C17/00—Sliding-contact bearings for exclusively rotary movement
F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
F16C33/02—Parts of sliding-contact bearings
F16C33/04—Brasses; Bushes; Linings
F16C33/043—Sliding surface consisting mainly of ceramics, cermets or hard carbon, e.g. diamond like carbon [DLC]
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
F16C17/00—Sliding-contact bearings for exclusively rotary movement
F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S384/00—Bearings
Y10S384/90—Cooling or heating
Y10S384/91—Powders
Description
1 GB2027817A 1
SPECIFICATION
Improvements in and relating to the reduction in wear of contacting surfaces The invention relates to means for reducing the wear of surfaces and to an anti-friction device for example for guiding or supporting two relatively moving components, regardless or their relative speed, and particularly but not exclusively for receiving the high axial thrusts of a drilling turbine rotor.
The very large number of known types of bearings do not make it possible efficiently to avoid wear of the compartments which are in contact. This wear must be avoided particularly when the bearings for example support the rotor of a drilling turbine. Such wear can in fact have grave consequences because of the resulting reduction in the play between the vanes of the stator and of the rotor the elmination of this play leading to tieir destruction.
It is thus not possible to use solutions in which one of the components in contact is a wear component intended to be replaced, because this wear would result in the vanes coming closer together. Also known antifriction coatings are only effective under well- defined conditions which do not correspond to the substantial loads which the drilling turbines have to withstand.
In order to avoid the disadvantage of smooth bearing surfaces, one can use roller bearings, but here again the conditions for effective use cannot always be maintained, since the roller bearings are attacked by the drilling sludge, and their leaktightness cannot be maintained.
The invention relates to a process which 105 makes it possible to reduce the wear of the surfaces in contact virtually to zero over all temperatures and pressures outside those at which diamond is converted to graphite. Ac cording to one aspect of the invention there is 110 provided a method of producing wear resis tant surfaces to be in continuous or intermit tent contact, comprising providing surfaces comprising diamonds and lapping the sur- faces.
Preferably the surfaces are lapped against each other at least in the final stages of lapping.
Experience has shown that, regardless of the types of diamonded surfaces, which may be surfaces of diamond- containing concretions or of diamonds, used, after lapping the two surfaces against one another, an anti-friction device constituted by the surfaces not only resists high pressures and high speeds, but also shows virtually no wear once lapping has been completed.
Furthermore, experience has shown that it is possible not only to use a great variety of such smooth diamonded surfaces of identical compositions, but that the anti-friction device thus produced can be applied to all the known types of bearings, one of the surfaces playing the role of the actual bearing and the other surface sliding or rolling on the bearing surface. In particular, when the pressure stresses are high and the speed is high, it is possible to use a bearing consisting of a contact ring provided with a diamonded surface bearing on surfaces of shoes of the same nature as the ring, after lapping the diamonded surfaces which are in contact. This has the advantage that it is possible to reduce the temperature of the surfaces by circulating a cooling fluid between the shoes, so as to keep the conditions further away from the conditions under which diamond is transformed into graphite.
The invention also relates to the application of such diamonded surfaces, after lapping, to bearings of any type and especially to fluid bearings where the surfaces of the bearings are separated, at high speeds, by a liquid or gaseous fluid film, these various bearings each being connected with a diamonded sur- face which forms with the diamonded surface of the bearing, an anti- friction device which avoids all wear.
Extensive experiments with surfaces of diamond-containing concretions of various com- positions proved such surfaces equally effective, regardless of whether the diamonds incorporated were of natural or artificial origin, and from the instant at which lapping has been completed.
It is thus possible to use rings of diamonds which serve as shoes on which a track or surface of a diamond-containing concretion bears.
An anti-friction device may thus comprise surfaces of which one is constituted by at least one track of a diamond-containing concretion, and of which another consists of a series of diamonds, the track having been lapped by the said diamonds.
All the types of diamonded surfaces, whether of diamond-containing concretions or of diamonds, used, whether of a similar nature or of a different nature, in respect of the compositions of the metal powders used or in respect of the sizes of the diamonds included in the diamond-containing concretions or the sizes of the diamonds used as shoes, have proved not to suffer from wear once the surfaces have been lapped together.
The invention is applicable to any antifriction device and especially to all types of bearings, including thrust bearings, step-bearings and fluidfilm bearings which serve to guide and support another diamonded surface permanently or intermittently.
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawing.
In the drawing, the single Figure shows schematically an axial part-section of part of a 2 GB2027817A 2 stator and a rotor of a drilling turbine, includ ing a bearing employing an embodiment of an anti-friction device according to the present invention.
The stator shown in the drawing comprises a cylindrical part 1 of which the axis 3 coincides with the axis of a central rotor 4.
The rotor 4 includes a circular support 5 below which is fixed, or incorporated, a ring 8 made of a diamond-containing concretion.
The lower surface 6 of the ring bears on the surfaces 7 of a series of shoes 9 fixed to the stator 1.
The shoes 9, made of a diamond-containing concretion identical to that of the ring 8, are 80 fixed to, or incorporated in, an annular sup port 2 of the stator 1.
In this example, only the axial forces are high and therefore the bearing 10, mounted at the periphery of the support 2, can be of any type and may be a bearing having a diamonded surface which is lapped against a diamonded cylindrical surface of the rotor 4.
The compositions of the ring 8 of diamond containing concretion and of the shoes 9 may, for example, be one of the diamond-contain ing concretions used in drilling tools.
The surfaces 6 and 7 are lapped by, for example, rubbing the surfaces against one another until any detectable trace of wear has disappeared. It is in fact found, as has been explained above, that, as from the moment that lapping has been completed, wear ceases.
the diamond-containing concretions commonly used in high-output drilling tools have been mentioned as examples of diamondcontaining concretions, it will be appreciated that the invention is not intended to be limited to these examples, and that all diamonded compositions can prove suitable provided that one surface of such a composition can be lapped against another surface of the same nature in order to arrive at the absence of wear. It is furthermore possible to carry out a part of the lapping on surfaces of different compositions, lapping between the surfaces of a bearing of the same nature or of different nature having taken place by finishing the lapping or by effecting the actual lapping.
Thus, as a generality, while the two diamonded surfaces are lapped against one another in the final stages of lappng, in the initial stages of lapping the surfaces may be lapped independently of one another or may be lapped against one another.
By way of example, the diamond-containing concretions referred to in French Patent No.
2029963 may be used for one or both of the diamonded surfaces.
Claims (13)
1. A method of producing wear resistant surfaces to be in continuous or intermittent contact, comprising providing surfaces comprising diamonds and lapping the surfaces.
2. An anti-friction device comprising two connected surfaces made using a method as Though in general lapping is achieved more 100 claimed in claim 1. rapidly if the compositions of the concretions are identical and if the concretions contain diamond of small particle size, it is possible to obtain lapped surfaces which do not wear further when the particle sizes are different and when the concretions correspond to different compositions.
In particular, in the application of the surfaces to the bearings of a drilling turbine, it is found that contrary to the destructive effect which the drilling sludge has on roller bearings when the drilling sludge is used as a cooling fluid, the sludge has no harmful effect on the diamonded friction surfaces. The sludge which circulates between the shoes 9 and the ring 8 only has the effect of cooling the surfaces 7, 6 of the shoes and ring. The absence of deterioration of the diamonded and lapped surfaces 6 and 7 is remarkable and is also one of the factors in the absence of wear.
Where it is desired to produce fluid bearings, one proceeds in the same manner to effect lapping of the diamonded surfaces of the cylindrical bearings and the diamonded surfaces of components which delimit the fluid films.
Even though only a single example of an anti-friction device, for a welldefined applica- tion, has been described, and even though
3. An anti-friction device as claimed in claim 2, wherein each of the diamonded surfaces is made of a diamond-containing concretion.
4. An anti-friction device as claimed in claim 3, wherein the diamondcontaining concretions are identical.
5. An anti-friction device as claimed in claim 3, wherein the particle sizes of the diamonds in the diamond-containing concretions of the two surfaces are different.
6. An anti-friction device as claimed in any one of claims 2 to 5 for a drilling turbine, wherein one of the surfaces is provided on a ring fixed to the rotor and the other surface is fixed to the stator, the diamonded surface of one of the rings resting against the diamonded surface of the other ring.
7. An anti-friction device as claimed in claim 6, wherein the diamonded surface of the stator is provided by shoes made of a diamond-containing concretion.
8. An anti-friction device as claimed in claim 2, wherein the diamonded surfaces are separated by a fluid or gaseous film.
9. An anti-friction device as claimed in claim 2, wherein one of the surfaces is provided by at least one track of a lapped diamonded surface, the other surface comprising at least one series of diamonds sliding on the 3 GB2027817A 3 track.
10. A bearing for guiding and/or supporting a diamonded surface, comprising a guide and/or support surface for the diamonded surface which forms, with the said surface, an anti-friction device as claimed in any one of claims 2 to 9.
11. A method of producing wear resistant surfaces as claimed in claim 1 substantially as 10 herein described.
12. An anti-friction device as claimed in claim 2 substantially as herein described.
13. A bearing as claimed in claim 10 substantially as herein described.
Printed for Her Majesty’s Stationery Office by Burgess Et Son (Abingdon) Ltd-1 980. Published at The Patent Office, 25 Southampton Buildings, London, WC2A I AY, from which copies may be obtained.
GB7927445A
1978-08-11
1979-08-07
Reduction in wear of contacting surfaces
Expired
GB2027817B
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR7823809A
FR2433130A1
(en)
1978-08-11
1978-08-11
ANTIFRICTION DEVICE, PARTICULARLY FOR A TURBINE, AND METHOD FOR THE PRODUCTION THEREOF
Publications (2)
Publication Number
Publication Date
GB2027817A
true
GB2027817A
(en)
1980-02-27
GB2027817B
GB2027817B
(en)
1982-08-11
Family
ID=9211810
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB7927445A
Expired
GB2027817B
(en)
1978-08-11
1979-08-07
Reduction in wear of contacting surfaces
Country Status (17)
Country
Link
US
(1)
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JP
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JPS6029013B2
(en)
AR
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CA
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CA1135313A
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CH
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ES
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FR
(1)
FR2433130A1
(en)
GB
(1)
GB2027817B
(en)
IT
(1)
IT1122462B
(en)
NL
(1)
NL178025C
(en)
NO
(1)
NO792592L
(en)
RO
(1)
RO78961A
(en)
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1978-08-11
FR
FR7823809A
patent/FR2433130A1/en
active
Granted
1979
1979-08-03
BE
BE0/196593A
patent/BE878068A/en
not_active
IP Right Cessation
1979-08-07
GB
GB7927445A
patent/GB2027817B/en
not_active
Expired
1979-08-08
NL
NLAANVRAGE7906058,A
patent/NL178025C/en
not_active
IP Right Cessation
1979-08-08
NO
NO792592A
patent/NO792592L/en
unknown
1979-08-08
CH
CH728779A
patent/CH635908A5/en
not_active
IP Right Cessation
1979-08-09
DE
DE19792932416
patent/DE2932416A1/en
active
Granted
1979-08-09
IT
IT25035/79A
patent/IT1122462B/en
active
1979-08-10
JP
JP54102136A
patent/JPS6029013B2/en
not_active
Expired
1979-08-10
AR
AR277675A
patent/AR221892A1/en
active
1979-08-10
BR
BR7905161A
patent/BR7905161A/en
unknown
1979-08-10
CA
CA000333527A
patent/CA1135313A/en
not_active
Expired
1979-08-10
ES
ES483318A
patent/ES483318A1/en
not_active
Expired
1979-08-10
AU
AU49799/79A
patent/AU525076B2/en
not_active
Ceased
1979-08-10
DD
DD79214919A
patent/DD145556A5/en
not_active
IP Right Cessation
1979-08-11
RO
RO7998434A
patent/RO78961A/en
unknown
1981
1981-04-28
US
US06/258,258
patent/US4345798A/en
not_active
Expired – Lifetime
Also Published As
Publication number
Publication date
CA1135313A
(en)
1982-11-09
FR2433130B1
(en)
1983-01-21
DD145556A5
(en)
1980-12-17
ES483318A1
(en)
1980-09-01
FR2433130A1
(en)
1980-03-07
US4345798A
(en)
1982-08-24
JPS5524899A
(en)
1980-02-22
IT7925035D0
(en)
1979-08-09
NO792592L
(en)
1980-02-12
GB2027817B
(en)
1982-08-11
BE878068A
(en)
1979-12-03
IT1122462B
(en)
1986-04-23
NL7906058A
(en)
1980-02-13
BR7905161A
(en)
1980-05-06
RO78961A
(en)
1982-04-12
CH635908A5
(en)
1983-04-29
JPS6029013B2
(en)
1985-07-08
DE2932416C2
(en)
1987-08-27
AU4979979A
(en)
1980-02-14
AU525076B2
(en)
1982-10-21
NL178025C
(en)
1986-01-02
DE2932416A1
(en)
1980-02-21
AR221892A1
(en)
1981-03-31
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Legal Events
Date
Code
Title
Description
1995-04-05
PCNP
Patent ceased through non-payment of renewal fee
Effective date:
19940807
