GB2152235A - Armoured optical fibre cable for use in an optical communication system for drill hole logging - Google Patents
Armoured optical fibre cable for use in an optical communication system for drill hole logging Download PDFInfo
- Publication number
- GB2152235A GB2152235A GB08502296A GB8502296A GB2152235A GB 2152235 A GB2152235 A GB 2152235A GB 08502296 A GB08502296 A GB 08502296A GB 8502296 A GB8502296 A GB 8502296A GB 2152235 A GB2152235 A GB 2152235A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cable
- fibres
- optical fibre
- armoured
- helix
- 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.)
- Granted
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 11
- 230000003287 optical effect Effects 0.000 title claims abstract description 10
- 238000004891 communication Methods 0.000 title description 4
- 239000004033 plastic Substances 0.000 claims abstract description 14
- 229920003023 plastic Polymers 0.000 claims abstract description 14
- 239000004593 Epoxy Substances 0.000 claims abstract description 7
- 238000005260 corrosion Methods 0.000 claims abstract description 5
- 230000007797 corrosion Effects 0.000 claims abstract description 5
- 229920000642 polymer Polymers 0.000 claims abstract description 5
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 5
- 239000004945 silicone rubber Substances 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 3
- 239000003365 glass fiber Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 3
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 3
- 239000011248 coating agent Substances 0.000 claims 2
- 238000003618 dip coating Methods 0.000 claims 1
- 239000011521 glass Substances 0.000 abstract description 5
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 9
- 239000000523 sample Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 239000012267 brine Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- 229920006362 Teflon® Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
- E21B47/135—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency using light waves, e.g. infrared or ultraviolet waves
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
- D07B1/147—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising electric conductors or elements for information transfer
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Mining & Mineral Resources (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Geophysics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Optical Communication System (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Earth Drilling (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
An armoured optical fibre cable is formed with a core construction comprising three glass clad optical fibres 51 twisted into a long pitch helix, a sort plastic buffer coat 52 around the fibres 51, and a hard jacket 53 of low diffusivity encasing the buffer coat 52. The sort buffer coat can be formed from silicone rubber and the hard jacket can be formed from a metal tube or a glass filled epoxy polymer. In the latter case, the epoxy polymer jacket is preferably surrounded by a corrosion resistant layer 54 e.g. of a fluorinated hydrocarbon. <IMAGE>
Description
1 GB 2 152 235A 1
SPECIFICATION
Armoured optical fibre cable for use in an optical communication system for drill hole logging This invention relates to drill hole logging equipment, whereby data are transmitted from a downhole instrumentt probe to the surface at a high rate.
The fastest bit rate transmittable through electromechanical cables from the deepest oil wells (10,000 metres) is a few tens of kilohertz. In contrast, the ever more sophisticated multiple- sensor probes under development have created a need for higher transmission rates. The well10 known broad band characteristics of optical fibres, together with the long lengths transmissable without repeaters, make this possible. The fibre, of course, must be incorporated into an armoured cable without adding significant light loss due to perturbations of the fibre (microbends").
The problem of implementing an optical fibre transmission system arises from the very hostile 15 environment encountered in deep drill holes. They are filled with corrosive brine, often with dissolved hydrogen suffide. The pressure in drilling mud may be as high as 30,000 PSI (2070 bar). The temperature may be as high as 25WC. Other limitations are that electrical power and space are at a premium in the downhole probe. It must be convenient to connect and disconnect the cable and probe. Finally, the probes are often lost downhole. Thus the transmitter cannot be inordinately expensive.
No component of the conventional optical transmission systems can function satisfactorily in the downhole environment without cooling. Semiconductor lasers and LEDs (light emitting diodes) do not operate above 1 OWC. High pressure connectors which provide a make/break optical pathway from cable-head to probe do not exist. Ail plastics lose their integrity in the extreme downhole environment. Even fluorinated compounds, which are chemically inert, tend to flow under stress. An additional problem is that water penetrates plastics and promotes stress corrosion of the glass fibre.
According to one aspect of the invention, there is provided an armoured optical fibre cable for use in an optical communication system for drill hole logging, characterised in that the cable has 30 a core comprising at least three clad optical fibres twisted into a long pitch helix, a soft plastic buffer coat about and between the clad fibres, and a hard jacket of low diffusivity about the clad fibres and the soft plastic buffer coat.
An optical communication system for drill hole logging in which the armoured optical fibre cable of the invention can be used is described in out copending Application No. 8219942 35 (Serial No. 2104752).
For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawing, which is a cross-section of an armoured optical fibre cable designed in accordance with the invention.
The drawing depicts the cross-section of a cable designed in accordance with the invention. In 40 this embodiment, three glass clad fibres 51, are encased in a jacket 53, which has the following essential properties:
A. It must be hard and stiff to protect the fibres against bending during the subsequent cabling manufacture operations, such as the laying on of the outer armour 58d. This is essential since---microbending- allows light to leak out of the fibre-cladding-that is the attenuation is increased thereby. Any bubbles or voids in the first soft plastic -buffer- coat 52, around the fibres 51, will be compressed and thereby induce microbends, unless the jacket is sufficiently incompressible that the ambient pressure is not transmitted.
B. The jacket 53 must be pinhole free and resist diffusion of the ambient liquid. This is not only to keep down the pressure, but to protect the fibre and its plastic buffer against chemical 50 attack. The microcracks in the surface of a glass clad fibre under tension will propagate in the presence of moisture and cause the fibre to break.
The three fibres are dip-coated with silicone rubber elastomer 52 to form a symmetric buffered core. Additional buffering may be provided by an additional plastic sheath. During this coating process the fibres are twisted into a helix of long pitch g. 1.5 inches (38.1 mm) long. Besides easing the bending of the core, this helix has the additional advantage that, as the completed cable undergoes a tensile strain, the fibres will tend to straighten out, compressing the elastomer, and the core will lengthen, without the glass fibres themselves undergoing as great a strain as the overall cable. This reduces the chance of breakage.
The buffered core 52 is encased in a hard jacket capable of withstanding the pressure, and of 60 low diffusivity to protect the inner components from attack by the brine. The jacket may comprise more than one layer. For example, a layer 53 may be hard and crush resistant, while a second layer 54 is of low diffusivity and resistent to corrosive attack. Thus, the two layers, 53 and 54, in combination provide the required jacket qualities. Illustratively, layer 53 may be a high temperature epoxy polymer filled with longitudinal glass fibre strands. This jacket material, 65 2 GB 2 152 235A 2 applied by the well-known---pultrusiontechnique, has been found to add very little to the light loss in the fibres due to microbends, even at high pressure or tension. As the liquid epoxy is cured or polymerized, it conforms precisely to the buffered fibres without causing microbends.
Also, if it is cured thermally, it contracts and compresses the fibre longitudinally. This tends to counter the effect of a tensile strain and thermal expansion in the cable armour. Layer 54 may 5 be a fluorinated hydrocarbon compound, such as a polytetrafluoroethylene, e.g. one of Dupont's Teflons. The word---Teflon-is a registered Trade Mark. These plastics are chemically inert and of low diffusivity. Alternatively, and preferably for highest temperature operation, the jacket layer, 53, may be a metal tube, impervious to water. For example, a welded nickel-steel alloy tube with 0.095" (2.41 mm) O.D. and 0.0083" (0.21 mm) wall thickness has been tested to 10 15,000 PSI (1034 bar) without being crushed.
In order to provide power downhole, the fibre protecting jacket, 53 and 54, is surrounded by an annular ring of conductors 55, divided into groups insulated from each other by spacers 56.
Alternatively, the bundles of wires can each have their own insulation. The conductors in turn are covered by an extruded insulating plastic layer 57d, which again is preferably a fluorinated 15 n,,,--lrocarbon compound to resist chemical attack at high pressure and temperature. In an a Iternative design, the layer 57d can be constructed like the jacket, 53 and 54. That is, both the fibers 51 and the conductors 55 can be contained within the hard, pressure resistant and low-diffusivity jacket.
The layer 57d, besides being a brine barrier, also serves as bedding for the double-layer, 20 counterhelical, torque-balanced armour 58d. This armour must be on the outside of any working drill hole logging cable to resist the abrasion resulting from raising and lowering the instrument probe.
Without in any way affecting the generality of the foregoing description, Table 1 below presents the dimensions of the various elements of the armoured optical fibre cable made for 25 drill hole logging data transmission, which is depicted in the drawing.
TABLE 1 Glass clad fibre 51, diameter, each of 3 140gm 30 Silicone rubber buffer, 52 0.032 inch O-D. (0.813 mm) Glass fibre filled epoxy, 53 0.054 inch O.D. (1.37 mm) Dupont PFA Teflon, 54 0.064 inch O.D. (1.63 mm) 4 groups of Cu wires, 55, diameters 0.0089 inch (0.23mm) 35 PFA insulation and armour bed, 57d 2 layers of steel armour, 58d 0. 114 inch O.D. (2.90 mm) 0.185 inch O.D. (4.7 mm)
Claims (13)
1. An armoured optical fibre cable having a core comprising at least three clad optical fibres twisted into a long pitch helix, a soft plastic buffer coat about and between the clad fibres, and a hard jacket of low diffusivity about the clad fibres and the soft plastic buffer coat.
2. A cable as claimed in Claim 1, wherein the soft plastic buffer coat comprises silicone rubber.
3. A cable as claimed in Claim 1 or 2, wherein the hard jacket comprises an epoxy polymer filled with glass fibre strands.
4. A cable as claimed in Claim 1 or 2, wherein the hard jacket comprises a metal tube.
5. A cable as claimed in Clairn 4, wherein the metal tube is formed from a steel alloy.
6. A cable as claimed in Claim 3 and further comprising a low diffusivity, corrosion resistant 50 layer about the epoxy polymer layer.
7. A cable as claimed in Claim 6, wherein the corrosion resistant layer is formed from a fluorinated hydrocarbon compound.
8. A cable as claimed in Claim 7, polytetrafluoroethylene.
9. A cable as claimed in any preceding claim, wherein the pitch length of the helix is 1.5 inches (38.1 mm).
10. A method of constructing a core for an armoured optical fibre cable comprising the steps of:
(1) twisting at least three clad fibres into a long pitch helix and at the same time coating said 60 fibres with a soft plastic buffer; and (2) providing the coated twisted fibres with a hard jacket of low diffusivity.
11. A method according to Claim 10, wherein the coating step comprises dip-coating with a silicone rubber elastomer.
wherein the corrosion resistant layer is formed from a
12. A method according to Claim 10 or 11, wherein in the twisting step the fibres are 65 3 GB 2 152 235A 3 twisted to provide a pitch length for the helix of 1.5 inches (38.1 mm).
13. An armoured optical fibre cable substantially as hereinbefore described with reference to, and as shown in, the accompanying drawing.
Printed in the United Kingdom for Her Majesty's Stationery Office, Dd 8818935, 1985, 4235. Published at The Patent Office, 25 Southampton Buildings, London, WC2A 'I AY, from which copies may be obtained.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US28514681A | 1981-07-20 | 1981-07-20 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8502296D0 GB8502296D0 (en) | 1985-02-27 |
| GB2152235A true GB2152235A (en) | 1985-07-31 |
| GB2152235B GB2152235B (en) | 1986-03-05 |
Family
ID=23092929
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08219942A Expired GB2104752B (en) | 1981-07-20 | 1982-07-09 | Optical communication system for drill hole logging |
| GB08502296A Expired GB2152235B (en) | 1981-07-20 | 1985-01-30 | Armoured optical fibre cable for use in an optical communication system for drill hole logging |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08219942A Expired GB2104752B (en) | 1981-07-20 | 1982-07-09 | Optical communication system for drill hole logging |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5866196A (en) |
| CA (1) | CA1202081A (en) |
| DE (1) | DE3227083A1 (en) |
| ES (1) | ES8401565A1 (en) |
| FR (1) | FR2513307B1 (en) |
| GB (2) | GB2104752B (en) |
| IT (1) | IT1207302B (en) |
| NO (1) | NO160955C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2169095A (en) * | 1984-12-19 | 1986-07-02 | Telephone Cables Ltd | Optical cables |
| EP0231581A2 (en) * | 1985-12-27 | 1987-08-12 | Conax Buffalo Corporation | Metal-encased light conductor |
| US4867527A (en) * | 1987-03-31 | 1989-09-19 | Societa' Cavi Pirelli S.P.A. | Combined electrical power and optical fiber cable |
| GB2226270A (en) * | 1988-12-22 | 1990-06-27 | Stc Plc | Moulding optical fibre cables |
| US4974926A (en) * | 1989-04-06 | 1990-12-04 | At&T Bell Laboratories | Underwater optical fiber cable |
| FR2664327A1 (en) * | 1990-07-04 | 1992-01-10 | Clot Andre | Device for logging in a clear zone |
| GB2333610A (en) * | 1998-01-23 | 1999-07-28 | Western Atlas Int Inc | Fibre optic well logging cable |
| WO2009099332A1 (en) * | 2008-02-07 | 2009-08-13 | Tecwel As | Data communication link |
| US7920765B2 (en) * | 2005-06-09 | 2011-04-05 | Schlumberger Technology Corporation | Ruggedized optical fibers for wellbore electrical cables |
| AT13841U1 (en) * | 2013-06-13 | 2014-10-15 | Teufelberger Seil Ges M B H | Wire rope for stationary applications and method for producing such a wire rope |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4523804A (en) * | 1982-08-17 | 1985-06-18 | Chevron Research Company | Armored optical fiber cable |
| US4696542A (en) * | 1982-08-17 | 1987-09-29 | Chevron Research Company | Armored optical fiber cable |
| US4522464A (en) * | 1982-08-17 | 1985-06-11 | Chevron Research Company | Armored cable containing a hermetically sealed tube incorporating an optical fiber |
| GB2137040B (en) * | 1983-03-23 | 1986-11-19 | Smiths Industries Plc | Tyre pressure sensing system |
| US4596050A (en) * | 1984-04-26 | 1986-06-17 | Rogers Gordon W | Information processing system using optically encoded signals |
| DE3422271C2 (en) * | 1984-06-15 | 1987-01-15 | Bergwerksverband Gmbh, 4300 Essen | Borehole investigation procedures |
| US4721355A (en) * | 1984-06-22 | 1988-01-26 | Chevron Research Company | Optical cable connector assembly including breakable link and process using same |
| US4849753A (en) * | 1984-08-15 | 1989-07-18 | Chevron Research Company | Electro optic high temperature well bore modulator |
| DE3444309A1 (en) * | 1984-12-05 | 1986-06-19 | Heinrich Wüst KG, 7536 Ispringen | Mains adaptor with automatic matching to the mains voltage |
| NO158039C (en) * | 1985-03-01 | 1988-06-29 | Standard Tel Kabelfab As | Well logging CABLE. |
| US4759601A (en) * | 1985-06-24 | 1988-07-26 | Schlumberger Technology Corporation | Fiber optic connector assembly |
| JPS622412A (en) * | 1985-06-28 | 1987-01-08 | 株式会社フジクラ | Optical fiber compound aerial wire |
| GB2196809B (en) * | 1986-10-23 | 1991-05-22 | Plessey Co Plc | Optical communication system |
| GB2197066B (en) * | 1986-11-05 | 1990-11-21 | Plessey Co Plc | Improvements relating to bathythermographs |
| CA1297157C (en) * | 1987-07-13 | 1992-03-10 | Geoffrey Nelson Bowling | Closed loop, programmable power and communication system |
| US5140319A (en) * | 1990-06-15 | 1992-08-18 | Westech Geophysical, Inc. | Video logging system having remote power source |
| US5202944A (en) * | 1990-06-15 | 1993-04-13 | Westech Geophysical, Inc. | Communication and power cable |
| US5428961A (en) * | 1992-07-21 | 1995-07-04 | Sanyo Electric Co., Ltd. | Micromachines |
| FR2745847B1 (en) * | 1996-03-08 | 2000-09-15 | Inst Francais Du Petrole | MEASUREMENT TRANSMISSION SYSTEM COMPRISING AN OPTOELECTRIC CONVERTER |
| DE19705920C2 (en) * | 1997-02-17 | 1999-12-02 | Schott Glas | Process for the production of coated glass bundles |
| DE19807891A1 (en) | 1998-02-25 | 1999-08-26 | Abb Research Ltd | Fiber-laser sensor for measurement of elongation, temperature or especially isotropic pressure in oil well |
| FR2820593B1 (en) | 2001-02-02 | 2003-05-23 | Schlumberger Services Petrol | OPTICAL PATH |
| GB2417627B (en) * | 2002-07-18 | 2006-07-19 | Pgs Americas Inc | Fiber-optic seismic array telemetry system, and method |
| US6850461B2 (en) | 2002-07-18 | 2005-02-01 | Pgs Americas, Inc. | Fiber-optic seismic array telemetry, system, and method |
| US6980714B2 (en) * | 2003-09-26 | 2005-12-27 | Moog Components Group Inc. | Fiber optic rotary joint and associated reflector assembly |
| DE10344875A1 (en) * | 2003-09-26 | 2005-04-28 | Siemens Ag | Data transmission method and optical rotary transformer with implementation |
| US7515774B2 (en) | 2004-12-20 | 2009-04-07 | Schlumberger Technology Corporation | Methods and apparatus for single fiber optical telemetry |
| US8571368B2 (en) * | 2010-07-21 | 2013-10-29 | Foro Energy, Inc. | Optical fiber configurations for transmission of laser energy over great distances |
| RU2759729C1 (en) * | 2020-11-03 | 2021-11-17 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военный учебно-научный центр Военно-Морского Флота "Военно-морская академия имени Адмирала флота Советского Союза Н.Г. Кузнецова" | Transceiver optical apparatus |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2021282A (en) * | 1978-05-22 | 1979-11-28 | Post Office | Submarine optical fibre cable |
| US4239335A (en) * | 1978-08-28 | 1980-12-16 | Sea-Log Corporation | Fiber reinforced optical fiber cable |
| GB2052092A (en) * | 1979-06-28 | 1981-01-21 | Cables De Lyon Geoffroy Delore | Underwater optical fibre cable |
| EP0034286A1 (en) * | 1980-02-06 | 1981-08-26 | COMPAGNIE LYONNAISE DE TRANSMISSIONS OPTIQUES Société anonyme dite: | Process and device for manufacturing a waterproof fibre-optical cable |
| GB2082790A (en) * | 1980-08-29 | 1982-03-10 | Nippon Telegraph & Telephone | Optical fibre in grooved central member type cable and manufacture |
| EP0048674A2 (en) * | 1980-09-22 | 1982-03-31 | Schlumberger Limited | A method for preparing a fiber optic core assembly for a logging cable and such fibre optic core assembly |
| GB2085188A (en) * | 1980-09-26 | 1982-04-21 | Bicc Ltd | An improved optical cable |
| GB2089520A (en) * | 1980-11-20 | 1982-06-23 | Cables De Lyon Geoffroy Delore | A method of manufacturing an optical fibre cable |
| EP0060061A1 (en) * | 1981-03-06 | 1982-09-15 | Bridon Limited | Strain cables |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7241689U (en) * | 1966-02-03 | 1973-07-05 | Bbc Ag | Device for the transmission of the measured value of a periodically variable measured variable from a measuring location at high voltage potential to a display location by means of light beams |
| DE1954643A1 (en) * | 1968-11-05 | 1970-06-25 | Lehoczky Dipl Ing Kalman | Device for the transmission of measured values between counter-rotating systems |
| DE2230658B2 (en) * | 1972-06-22 | 1976-05-26 | Erwin Sick Optik-Elektronik, 7808 Waldkirch | DEVICE FOR TRANSMISSION OF MESSAGES BY LIGHT |
| US3905010A (en) * | 1973-10-16 | 1975-09-09 | Basic Sciences Inc | Well bottom hole status system |
| US3903496A (en) * | 1974-06-14 | 1975-09-02 | Morton Stimler | Opto-acoustic hydrophone |
| FR2292294A1 (en) * | 1974-11-20 | 1976-06-18 | Dassault Electronique | Contact free signal transmission between rotating systems - using light modulated signals and optical fibres arranged in ring formations to transmit continuous (NL240576) |
| GB1538485A (en) * | 1976-01-07 | 1979-01-17 | Rank Organisation Ltd | Opto-electric device |
| US4162400A (en) * | 1977-09-09 | 1979-07-24 | Texaco Inc. | Fiber optic well logging means and method |
| US4156104A (en) * | 1977-10-11 | 1979-05-22 | Bell Telephone Laboratories, Incorporated | Submarine cable for optical communications |
| US4189705A (en) * | 1978-02-17 | 1980-02-19 | Texaco Inc. | Well logging system |
| DE3030361C2 (en) * | 1979-08-20 | 1984-04-19 | Sumitomo Electric Industries, Ltd., Osaka | Device for the transmission of signals between a movable and a stationary unit by means of an optical multi-core cable wound onto a drum |
| US4389645A (en) * | 1980-09-08 | 1983-06-21 | Schlumberger Technology Corporation | Well logging fiber optic communication system |
-
1982
- 1982-07-09 GB GB08219942A patent/GB2104752B/en not_active Expired
- 1982-07-13 FR FR8212274A patent/FR2513307B1/en not_active Expired
- 1982-07-16 IT IT8222431A patent/IT1207302B/en active
- 1982-07-17 DE DE19823227083 patent/DE3227083A1/en active Granted
- 1982-07-19 JP JP57125603A patent/JPS5866196A/en active Granted
- 1982-07-19 NO NO822483A patent/NO160955C/en unknown
- 1982-07-19 ES ES514133A patent/ES8401565A1/en not_active Expired
- 1982-07-20 CA CA000407637A patent/CA1202081A/en not_active Expired
-
1985
- 1985-01-30 GB GB08502296A patent/GB2152235B/en not_active Expired
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2021282A (en) * | 1978-05-22 | 1979-11-28 | Post Office | Submarine optical fibre cable |
| US4239335A (en) * | 1978-08-28 | 1980-12-16 | Sea-Log Corporation | Fiber reinforced optical fiber cable |
| GB2052092A (en) * | 1979-06-28 | 1981-01-21 | Cables De Lyon Geoffroy Delore | Underwater optical fibre cable |
| EP0034286A1 (en) * | 1980-02-06 | 1981-08-26 | COMPAGNIE LYONNAISE DE TRANSMISSIONS OPTIQUES Société anonyme dite: | Process and device for manufacturing a waterproof fibre-optical cable |
| GB2082790A (en) * | 1980-08-29 | 1982-03-10 | Nippon Telegraph & Telephone | Optical fibre in grooved central member type cable and manufacture |
| EP0048674A2 (en) * | 1980-09-22 | 1982-03-31 | Schlumberger Limited | A method for preparing a fiber optic core assembly for a logging cable and such fibre optic core assembly |
| GB2085188A (en) * | 1980-09-26 | 1982-04-21 | Bicc Ltd | An improved optical cable |
| GB2089520A (en) * | 1980-11-20 | 1982-06-23 | Cables De Lyon Geoffroy Delore | A method of manufacturing an optical fibre cable |
| EP0060061A1 (en) * | 1981-03-06 | 1982-09-15 | Bridon Limited | Strain cables |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2169095A (en) * | 1984-12-19 | 1986-07-02 | Telephone Cables Ltd | Optical cables |
| EP0231581A2 (en) * | 1985-12-27 | 1987-08-12 | Conax Buffalo Corporation | Metal-encased light conductor |
| EP0231581A3 (en) * | 1985-12-27 | 1988-03-16 | Conax Buffalo Corporation | Metal-encased light conductor |
| US4867527A (en) * | 1987-03-31 | 1989-09-19 | Societa' Cavi Pirelli S.P.A. | Combined electrical power and optical fiber cable |
| US5007703A (en) * | 1988-12-22 | 1991-04-16 | Stc Plc | Method of making optical fibre cables |
| GB2226270A (en) * | 1988-12-22 | 1990-06-27 | Stc Plc | Moulding optical fibre cables |
| GB2226270B (en) * | 1988-12-22 | 1992-05-13 | Stc Plc | Optical fibre cables |
| US4974926A (en) * | 1989-04-06 | 1990-12-04 | At&T Bell Laboratories | Underwater optical fiber cable |
| FR2664327A1 (en) * | 1990-07-04 | 1992-01-10 | Clot Andre | Device for logging in a clear zone |
| GB2333610A (en) * | 1998-01-23 | 1999-07-28 | Western Atlas Int Inc | Fibre optic well logging cable |
| GB2333610B (en) * | 1998-01-23 | 2002-04-24 | Western Atlas Int Inc | Fiber optic well logging cables |
| US7920765B2 (en) * | 2005-06-09 | 2011-04-05 | Schlumberger Technology Corporation | Ruggedized optical fibers for wellbore electrical cables |
| WO2009099332A1 (en) * | 2008-02-07 | 2009-08-13 | Tecwel As | Data communication link |
| AT13841U1 (en) * | 2013-06-13 | 2014-10-15 | Teufelberger Seil Ges M B H | Wire rope for stationary applications and method for producing such a wire rope |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3227083C2 (en) | 1992-10-08 |
| CA1202081A (en) | 1986-03-18 |
| FR2513307A1 (en) | 1983-03-25 |
| GB2104752B (en) | 1986-02-19 |
| GB2152235B (en) | 1986-03-05 |
| JPS5866196A (en) | 1983-04-20 |
| GB2104752A (en) | 1983-03-09 |
| NO822483L (en) | 1983-01-21 |
| NO160955C (en) | 1989-06-14 |
| IT1207302B (en) | 1989-05-17 |
| ES514133A0 (en) | 1983-12-16 |
| JPH0259519B2 (en) | 1990-12-12 |
| NO160955B (en) | 1989-03-06 |
| ES8401565A1 (en) | 1983-12-16 |
| FR2513307B1 (en) | 1986-10-10 |
| GB8502296D0 (en) | 1985-02-27 |
| IT8222431A0 (en) | 1982-07-16 |
| DE3227083A1 (en) | 1983-04-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19970709 |