GB2114629A - Downhole instrument and methods of manufacturing and using the same - Google Patents
Downhole instrument and methods of manufacturing and using the same Download PDFInfo
- Publication number
- GB2114629A GB2114629A GB08303623A GB8303623A GB2114629A GB 2114629 A GB2114629 A GB 2114629A GB 08303623 A GB08303623 A GB 08303623A GB 8303623 A GB8303623 A GB 8303623A GB 2114629 A GB2114629 A GB 2114629A
- Authority
- GB
- United Kingdom
- Prior art keywords
- payload
- flexible
- hole
- probe
- casing
- 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
- 238000000034 method Methods 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000523 sample Substances 0.000 claims abstract description 61
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000002360 explosive Substances 0.000 claims abstract description 11
- 239000004744 fabric Substances 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 12
- 239000004020 conductor Substances 0.000 claims description 6
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000004760 aramid Substances 0.000 claims description 2
- 229920003235 aromatic polyamide Polymers 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920004511 Dow Corning® 200 Fluid Polymers 0.000 description 1
- 230000005355 Hall effect Effects 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- -1 e.g. Substances 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229920000260 silastic Polymers 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
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
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
- E21B23/10—Tools specially adapted therefor
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/02—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground by explosives or by thermal or chemical means
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A bore hole instrument includes an elongated flexible probe (11) which is inserted into a bore hole and can travel freely around bends of relatively short radius in the hole. The probe (11) includes a plurality of sensors (23), explosive charges or the like which are spaced apart and embedded in a flexible body (36) comprising a mass of cushioning and material, with a flexible outercasing (32) of fabric having a high tensile strength. The probe (11) is driven into a bore hole in piston-like fashion, and the flexible body (36) enables the probe to travel freely around bends of relatively short radius. Instrumentation for processing signals from the probe is located at the surface of the earth, and a flexible cable (16) interconnects the instrumentation with the probe (11). <IMAGE>
Description
1 GB 2 114 629 A 1
SPECIFICATION Downhole instrument and methods of manufacturing and using the same
This invention pertains generally to bore hole drilling and surveying, and more particularly to a 70 downhole instrument and methods of manufacturing and using the same.
In the drilling of oil wells and other bore holes in the earth, it is at times necessary to determine the location of the drill or the precise location of the hole at a substantial distance below the surface of the earth. For this purpose, a surveying probe is inserted into the hole, and data from the probe is analyzed at the surface to determine the location of the probe. It is also desirable to determine the direction in which the drill is progressing and to control this direction.
In the downhole surveying equipment heretofore provided, the probe generally comprises an elongated, rigid body with an inflexible metal shell. Probes of this type are incapable of traveling around bends of relatively short radius (e.g., a 6-12 inch radius in a hole having a diameter of the order of 3/4-1 inch), and therefore, they cannot be used in some holes. 90 Tools have also been provided for cutting and severing tubing, drill pipe and casing in a bore hole. Such tools generally have one or more remotely detonated explosive charges mounted in an elongated, rigid housing. Tools of this type are 95 subject to the same limitations and disadvantages as the surveying and logging instruments heretofore provided in that they cannot travel around bends of relatively short radius and are not suitable for use in some holes.
It is in general an object of the invention to provide a new and improved downhole instrument and methods of manufacturing and using the same Another object of the invention is to provide an 105 instrument and method of the above character which can also be utilized in the guidance of a downhole drill.
Another object of the invention is to provide an instrument and method of the above character 110 which can be utilized in the cutting or severing of tubing, drill pipe and casing.
Another object of the invention is to provide an instrument and method of the above character which are suitable for use in holes having bends of 115 relatively short radius.
Another object of the invention is to provide an instrument of the above character which is economical to manufacture.
These and other objects are achieved in 120 accordance with the invention by providing an elongated flexible probe which is inserted into a bore hole and can travel freely around bends of relatively short radius in the hole.
The probe includes one or more sensors, explosive charges or the like which are spaced apart and embedded in a flexible body comprising a mass of cushioning material, with a flexible outer casing of fabric having a high tensile strength. The probe is driven into a bore hole in piston-like fashion by a pressurized fluid such as water or air, and the flexible body enables the probe to travel freely around bends of relatively short radius. Instrumentation for processing signals from the probe is located at the surface of the earth, and a flexible cable interconnects the in-trumentation with the probe.
Figure 1 is a schematic diagram of one embodiment of a bore hole surveying system incorporating the invention, with the flexible probe being inserted into a bore hole and passing around a bend. Figure 2 is a block diagram of the surveying system of Figure 1. 80 Figure 3 is an enlarged sectional view, partly broken away, of the flexible probe of the embodiment of Figure 1. As illustrated in Figure 1, the surveying system - includes an elongated, flexible probe 11 which is inserted into a hole 12 to be surveyed. The hold can be a bore hole in the earth, as illustrated, or any other elongated opening of limited diameter such as the opening in a pipe or tubing. The probe has a generally circular cross section, with an outer diameter slightly smaller than the inner diameter of the hole, e.g., for a hole diameter on the order of 3/4-1 inch, the probe would have a diameter on the order of.70-. 95 inch. The length of the probe is substantially greater than the diameter, and a probe having a diameter of.70 inch could, for example, have a length on the order of 48 inches.
A flexible logging cable 16 extends in an axial direction from one end of the probe and carries electrical power and signals between the probe and equipment at the surface of the earth. This cable is of conventional design and has a plurality of flexible electrical conductors interleaved with a plurality of reinforcing strands of suitable material such as stainless steel. The cable is stored on a cable reel 18 at the surface of the earth, and the amount of cable fed into the hole is monitored by a cable length indicator 19 connected to the reel.
At the surface of the earth, the probe is interfaced with a microcomputer 21 by a suitable interface unit 22. The computer processes the signals from the probe and the cable depth indicator to determine the location and/or orientation of the hole in the region where the probe is located.
As illustrated in Figure 2, probe 11 includes a payload such as three orientation sensors 21-23 which provide electrical signals corresponding to the orientations of the sensors relative to orthogonal reference axes. In this embodiment, the reference axis of sensor 21 is aligned with the axis of the probe, and the axes of sensors 22, 23 are aligned in perpendicular radial directions. Sensors 21-23 can be any suitable sensors of known design, including fluxgate compasses and other magnetometers. As used herein, the term magnetometer includes any instrument capable of detecting natural or artificial flux lines, two common types of magnetometers being Hall effect 2 GB 2 114 629 A 2 devices and flux gate transformer systems. Other suitable sensors include gyroscopes and other inertia] devices. Sensors 21-23 are connected to cable 16 through an electrical power and signal conditioning module 26 in the probe. The probe also includes a inclinometer 27 which provides a signal corresponding to the orientation of the probe about a pitch axis. If desired, additional inclinometers can be included to provide additional information such as dip angle of the tool. Suitable inclinometers include accelerometers, electrolytic levels, and pendulous devices. Electrical connections between the cable, the power and signal conditioning module and the elements within the probe are made by a connector 28 of suitable known design.
Sensors 21-23, module 26, inclinometer 27 and connector 28 are spaced apart along the axis of probe 11 and are interconnected by flexible electrical conductors 3 1. Alternatively, the electrical components can be fabricated on a flexible circuit board, or on a board having a plurality of relatively short, rigid sections interconnected by one or more flexible sections.
These elements are encased within an elongated, flexible casing 32 of high tensile strength. The casing is closed and secured to a stainless steel nose piece 313 by a clamp 34 at the distal end of the probe, and at the proximal end the casing is affixed by a clamp 35 to connector 28 and thus to logging cable 16.
In one presently preferred embodiment, casing 32 comprises a fabric woven or braided of fibers having a high tensile strength, i.e., a tensile strength greater than that of stainless steel, 100 preferably 250,000 lb/in' or more. One presently preferred fabric is an aromatic polyamide fiber manufactured by DuPont under the trademark Keviar. This fiber has a tensile strength on the order of 400,000 Win'. Other suitable fibers of high tensile strength can also be employed, including graphite fibers, glass fibers, nylon fibers and boron fibers.
The interior of casing 32 is filled with a mass of flexible, electrically insulative material 36 which surrounds the sensors and other electrical components and provides cushioning for them. This material and the outer casing form a flexible body which can pass freely around bends of relatively short radius in the bore hole. Suitable materials include shicones and other synthetic rubber materials such as Devicon (trademark) polyurethane or a silicone rubber sold under the trademark Silastic. The flexible material can be either in a solid form or in a fluid form. Suitable fluid materials include silicones and fluorocarbons of high dielectric constant and low vapor pressure. The fluid can be in the form of a gel, and it preferably has a relatively high viscosity. One particularly suitable fluid material is a silane polymer known as Dow Corning 200 fluid. Alternatively, with a solid cushioning material, the fabric casing can be omitted, and axially extending fibers can be embedded in the mass of material to provide the desired tensile strength, in which case 130 it is desirable that the fibers be able to move axially within the mass of material to avoid collapsing of the body as it is bent.
The outer surface of casing 32 can be coated with a lubricious material such as polytetrafluoroethylene (Teflon) which facilitates the free passage of the probe through the bore hole. A flexible sealing ring 41 is affixed to the outer wall of the body toward the proximal end thereof to facilitate driving the probe through a bore hole, as discussed hereinafter. The outer diameter of the seal is chosen to provide sliding, sealing engagement with the inner wall of the opening in which the probe is to be used, and seals of different sizes and shapes can be mounted interchangeably for casings of different diameters. The seal can be bypassed with flow passageways (not shown) to prevent the formation of a vacuum behind the head of the probe as it is withdrawn from the hole.
In one presently preferred method of manufacture, the electrical components of the probe are connected together and suspended vertically from cable 16 in the desired spaced apart relationship. Casing 32 is positioned coaxially of these components, with the open end of the casing facing in an upward direction. The fluid silicone rubber material is then poured into the casing to form the flexible body. Connector 28 is installed and connected electrically to the leads in the probe and to the conductors of cable 16, the open end of the casing is drawn about the connector, and clamp 33 is installed.
With a solid cushioning material, the material can be formed about the electrical components in one or more successive layers, with adjacent ones of the layers being able to move somewhat relative to each other. The components and cushioning material are then inserted into the fabric casing as a unit.
In use, probe 11 is inserted into the upper portion of the hole to be surveyed or drilled, and pressurized fluid (e.g., water or air) is applied to the hole above the probe to drive the probe down through the hole in piston-like fashion, with seal 41 forming a seal between the body of the probe and the wall of the casing or other opening in which the probe is inserted. In the event that fluid is trapped in the hole ahead of the probe, it can be removed by any suitable means, e.g., by pumping it out of the hole, by withdrawing it from the hole by the cable, or by driving it into the formation surrounding the hole. When the probe reaches a bend in the hole, the body flexes, and the probe passes freely around the bend. As discussed above, the probe can travel around bends of relatively short radius, e.g., a bend having a radius of 6 inches in a hole having a diameter of 3/4-11 inch. The probe is withdrawn from the hole by drawing on the logging cable.
Because of its relatively small diameter, probe 11 is also suitable for use in the guidance of a downhole drilling system. In this application, the probe is mounted in the drill motor housing itself or in a fluid passageway near the drill head, and 1 1 J- 3 GB 2 114 629 A 3 v v cable 16 extends to the surface through the fluid passageway or another suitable passageway in the well casing. At the surface, the signals from the probe are processed and utilised to control the direction of the drill.
In addition to direction sensors, the payload or instrumentation within the probe can include other sensors for other logging functions, e.g., temperature, pressure, nuclear radiation, hydrogen ion concentration, and instruments for measuring the characteristics of the formation being drilled.
The invention is also useful in tools for cutting or severing drill pipes, tubing and/or casing in a bore hole. A tool of this type made in accordance with the invention is similar to the instrument of Figures 1 and 3, with electrically detonated explosive charges instead of sensore 21-23. The explosives can be any suitable explosives of known composition, e.g., pellets or plastic explosives, such as C3 or RDX. Electrical detonating signals are applied to the explosives by cable 16 and the electrical leads within the probe.
The charges can be arranged to provide any type of cutting action required, e.g., a concentrated 2-5 explosion for severing a drill head from the end of a tube, or a series of explosions for perforating a line as the probe passes through it.
It is apparent from the foregoing that a new and improved downhole probe and methods of 'manufacturing and using the same have been provided. While only certain presently preferred embodiments have been described in detail, as will be apparent to those familiar with the art, certain changes and modifications can be made without departing from the scope of the invention as defined by the following claims.
Claims (15)
1. In a package for carrying a payload in a bore hole in the earth: an axially elongated casing of 100 flexible material having a high tensile strength, an elongated mass of flexibie, cushioning material surrounding the payload and filling the casing to form a flexible body which can be propelled through the bore hole in piston-like fashion by 105 pressurized fluid and can travel around bends of relatively short radius in the bore hole, and a flexible cable extending axially from one end of the body and secured to the casing of flexible material for carrying signals between the payload and the surface of the earth.
2. The package of Claim 1 wherein the payload comprises a plurality of sensors spaced axially within the flexible body for providing electrical information signals.
3. The instrument of Claim 2 wherein at least one of the sensors is selected from the group consisting of magnetometers, accelerometers, gyroscopes and inertial devices.
4. The package of Claim 1 wherein the payload 120 comprises an explosive detonated by signals applied to the cable.
5. The package of Claim 1 wherein the casing is fabricated of fabric.
6. The package of Claim 1 wherein the casing is fabricated of a fabric comprising fibers selected from the group consisting of aromatic polyamide fibers, glass fibers, graphite fibers, boron fibers, nylon fibers, and combinations thereof.
7. The package of Claim 1 wherein the cushioning material comprises a silicone rubber.
8. The package of Claim 1 wherein the cushioning material is in a fluid state.
9. The package of Claim 1 wherein the outer surface of the casing is coated with a lubricious material.
10. In a method of manufacturing an instrument for use in a bore hole in the earth, the steps of: spacing a plurality of payload elements along an axis, interconnecting the payload elements with flexible electrical conductors, connecting a flexible cable to the payload elements for carrying signals between the payload elements and the surface of the earth, placing a casing of flexible, high tensile strength material around the payload elements and the conductors, affixing the cable to the flexible casing, and filling the casing with a mass of flexible cushioning material which surrounds the payload elements and the conductors to form a flexible probe capable of travelling around bends of relatively small radius in the bore hole.
11. In a method of transporting a payload into a hole having a limited diameter and at least one bend of relatively small radius, the steps of:
packaging the payload in an elongated, flexible body having a mass of cushioning material therein, introducing the body into the hole, passing the body along the hole and around the bend, the body flexing freely as the instrument passes around the bend, and. advancing the body along the hole until the payload is in a desired position.
12. The method of Claim 11 wherein the body is driven through the hole in piston-like fashion by introducing a pressurized fluid into the hole above the body.
13. The method of Claim 11 wherein the payload comprises a surveying instrument, and data from the surveying instrument is transmitted out of the hole.
14. The method of Claim 11 wherein the payload comprises an explosive cutting tool, the hold is formed in a tubing in a bore hole in the earth, and the explosive is detonated when the tool is in a predetermined position within the tubing to cut the tubing.
15. A package for carrying a payload substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
Printed for Her Majesty's Stationery Office by the Courier Press, Leamington Spa, 1983. Published by the Patent Office 25 Southampton Buildings, London, WC2A lAY, from which copies may be obtained.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US34730482A | 1982-02-09 | 1982-02-09 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8303623D0 GB8303623D0 (en) | 1983-03-16 |
| GB2114629A true GB2114629A (en) | 1983-08-24 |
| GB2114629B GB2114629B (en) | 1985-07-31 |
Family
ID=23363164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08303623A Expired GB2114629B (en) | 1982-02-09 | 1983-02-09 | Downhole instrument and methods of manufacturing and using the same |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0085989B1 (en) |
| JP (2) | JPS58193477A (en) |
| AU (1) | AU550360B2 (en) |
| BR (1) | BR8300651A (en) |
| CA (1) | CA1210449A (en) |
| DE (1) | DE3304462C2 (en) |
| FR (1) | FR2521210B1 (en) |
| GB (1) | GB2114629B (en) |
| IT (1) | IT1212697B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2311546A (en) * | 1996-03-29 | 1997-10-01 | Sensor Dynamics Ltd | Apparatus for the remote measurement of physical parameters |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO844838L (en) * | 1984-12-04 | 1986-06-05 | Saga Petroleum | PROCEDURE FOR REGISTERING A RELATIONSHIP BETWEEN OIL BROWN RESERVES. |
| GB2214638B (en) * | 1988-01-28 | 1991-11-13 | Coal Ind | Method of locating a member in a borehole |
| FR2712628B1 (en) * | 1993-11-15 | 1996-01-12 | Inst Francais Du Petrole | Measuring device and method in a hydrocarbon production well. |
| DE19837546C2 (en) * | 1998-08-19 | 2001-07-26 | Bilfinger Berger Bau | Measuring device for determining the alignment and the course of a drill pipe |
| US20020147187A1 (en) * | 2001-02-22 | 2002-10-10 | Schmidt Jonathan Martin | 1,2-diphenyl-1-naphthyl ethene derivatives, analogs and use thereof |
| US7351982B2 (en) * | 2005-05-24 | 2008-04-01 | Washington Savannah River Company Llp | Portable nuclear material detector and process |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1458925A (en) * | 1921-05-18 | 1923-06-19 | Hercules Powder Co Ltd | Detonator |
| US1860932A (en) * | 1930-01-17 | 1932-05-31 | Lamb Charles | Plumbing tool for oil-wells |
| US2036458A (en) * | 1934-08-04 | 1936-04-07 | Roy W Carlson | Telemetric device |
| US2690123A (en) * | 1950-09-11 | 1954-09-28 | Standard Oil Dev Co | Jet gun perforator for wells |
| US3052302A (en) * | 1960-07-25 | 1962-09-04 | Shell Oil Co | Tool carrier with by-pass |
| US3496998A (en) * | 1967-12-28 | 1970-02-24 | Pan American Petroleum Corp | Bearing means for reducing wireline friction in flow line loops |
| US3659649A (en) * | 1968-05-27 | 1972-05-02 | Atlantic Richfield Co | Method of stimulating oil or gas reservoirs by a subsurface nuclear explosion |
| GB1306781A (en) * | 1971-03-08 | 1973-02-14 | Texaco Development Corp | Method and apparatus for borehole directional logging |
| US3892274A (en) * | 1974-05-22 | 1975-07-01 | Halliburton Co | Retrievable self-decentralized hydra-jet tool |
| JPS5213762A (en) * | 1975-07-23 | 1977-02-02 | Hitachi Ltd | Multi-phase function generating circuit |
| US4031750A (en) * | 1976-09-02 | 1977-06-28 | Dresser Industries, Inc. | Apparatus for logging inclined earth boreholes |
| US4064939A (en) * | 1976-11-01 | 1977-12-27 | Dresser Industries, Inc. | Method and apparatus for running and retrieving logging instruments in highly deviated well bores |
| US4168747A (en) * | 1977-09-02 | 1979-09-25 | Dresser Industries, Inc. | Method and apparatus using flexible hose in logging highly deviated or very hot earth boreholes |
| US4279299A (en) * | 1979-12-07 | 1981-07-21 | The United States Of America As Represented By The United States Department Of Energy | Apparatus for installing condition-sensing means in subterranean earth formations |
| FR2473652A1 (en) * | 1979-12-20 | 1981-07-17 | Inst Francais Du Petrole | DEVICE FOR MOVING AN ELEMENT IN A CONDUIT COMPLETED WITH A LIQUID |
| FR2477285A1 (en) * | 1980-02-29 | 1981-09-04 | Schlumberger Prospection | DIAGRAPHY SENSOR ENVELOPE AND METHOD OF MANUFACTURING SAME |
-
1983
- 1983-02-08 AU AU11245/83A patent/AU550360B2/en not_active Ceased
- 1983-02-09 GB GB08303623A patent/GB2114629B/en not_active Expired
- 1983-02-09 FR FR8302039A patent/FR2521210B1/en not_active Expired
- 1983-02-09 JP JP58020522A patent/JPS58193477A/en active Pending
- 1983-02-09 BR BR8300651A patent/BR8300651A/en not_active IP Right Cessation
- 1983-02-09 EP EP83101245A patent/EP0085989B1/en not_active Expired
- 1983-02-09 CA CA000421208A patent/CA1210449A/en not_active Expired
- 1983-02-09 IT IT8319503A patent/IT1212697B/en active
- 1983-02-09 DE DE3304462A patent/DE3304462C2/en not_active Expired
-
1991
- 1991-10-14 JP JP1991083129U patent/JPH04113087U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2311546A (en) * | 1996-03-29 | 1997-10-01 | Sensor Dynamics Ltd | Apparatus for the remote measurement of physical parameters |
| GB2311546B (en) * | 1996-03-29 | 2000-12-06 | Sensor Dynamics Ltd | Apparatus for the remote measurement of physical parameters |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2521210A1 (en) | 1983-08-12 |
| IT1212697B (en) | 1989-11-30 |
| JPH0548144Y2 (en) | 1993-12-20 |
| EP0085989A3 (en) | 1985-07-03 |
| BR8300651A (en) | 1983-11-08 |
| JPS58193477A (en) | 1983-11-11 |
| EP0085989B1 (en) | 1989-09-20 |
| FR2521210B1 (en) | 1986-09-12 |
| DE3304462A1 (en) | 1983-08-18 |
| CA1210449A (en) | 1986-08-26 |
| DE3304462C2 (en) | 1985-09-19 |
| IT8319503A0 (en) | 1983-02-09 |
| EP0085989A2 (en) | 1983-08-17 |
| AU1124583A (en) | 1983-08-18 |
| GB2114629B (en) | 1985-07-31 |
| GB8303623D0 (en) | 1983-03-16 |
| AU550360B2 (en) | 1986-03-20 |
| JPH04113087U (en) | 1992-10-01 |
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| PCNP | Patent ceased through non-payment of renewal fee |