GB2276030A - Isotope injection substance, injection method and injector therefor - Google Patents
Isotope injection substance, injection method and injector therefor Download PDFInfo
- Publication number
- GB2276030A GB2276030A GB9301539A GB9301539A GB2276030A GB 2276030 A GB2276030 A GB 2276030A GB 9301539 A GB9301539 A GB 9301539A GB 9301539 A GB9301539 A GB 9301539A GB 2276030 A GB2276030 A GB 2276030A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plunger
- fluid
- substance
- cylinder
- injection
- 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.)
- Withdrawn
Links
- 239000000126 substance Substances 0.000 title claims abstract description 32
- 239000007924 injection Substances 0.000 title claims abstract description 27
- 238000002347 injection Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 9
- 239000012530 fluid Substances 0.000 claims abstract description 48
- 239000002245 particle Substances 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 19
- 230000002285 radioactive effect Effects 0.000 claims abstract description 16
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 3
- 239000011345 viscous material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003129 oil well 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/068—Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells
-
- 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
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/11—Locating fluid leaks, intrusions or movements using tracers; using radioactivity
-
- 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
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/11—Locating fluid leaks, intrusions or movements using tracers; using radioactivity
- E21B47/111—Locating fluid leaks, intrusions or movements using tracers; using radioactivity using radioactivity
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
Abstract
An isotope substance for injection into fluid, especially a well fluid, for the provision of radioisotope tracers in the fluid comprises radioactive solid particles suspended in a carrier comprising a gel or other semiviscous material. Injection of the substance is achieved by an extruding device, and this extruding device can comprise a plunger-in-cylinder apparatus (1) adapted to be fitted to a fluid conduit, for example at one leg (7A) of a T-piece (7) of the conduit. The apparatus preferably has a cone form discharge nozzle (5) for restricted discharge of the isotope substance from the apparatus into the fluid and discharge of the substance can be achieved by the supply of high pressure fluid to one side of the plunger within the cylinder (2) of the apparatus (1). <IMAGE>
Description
"ISOTOPE INJECTION SUBSTANCE, INJECTION METHOD AND INJECTOR
THEREFOR"
The present invention relates to the injection of radioisotopes (tracers) into a fluid especially a well fluid and more specifically to an isotope injection substance, and also to a method of injecting the substance and to an injector for carrying out the method.
Radioisotopes (sometimes referred to as tracers) have been injected into fluids placed in wells to enable these well fluids to be located accurately using suitable detection equipment for example by sensing devices run into the well hole by wireline at a later stage. For this purpose radioactive solids and liquids have been added to various fluids used in the oil industry, which fluids are then injected into the well under extremely high pressure.
Whereas it is fairly straightforward to add a radioactive liquid to a well fluid it is relatively difficult to inject radioactive solids into this fluid.
It is the principal object of the present invention to facilitate the injection of radioactive solids into a well fluid.
According to one aspect of the present invention an isotope injection substance for injection into a well fluid comprises radioactive solid particles suspended in a carrier comprising a gel or other semi-viscous material.
Preferably the radioactive solid particles are placed substantially uniformally in the carrier and in particular the particles can be located in a gel carrier so as to mitigate against substantial contact between the particles.
Preferably the radioactive solid particles have the consistency of sand. The carrier can be a gel of known type, for example the gel known as Swarfega.
According to another aspect of the present invention a method of injecting radioisotopes into a fluid comprises extruding the above isotope injection substance into a fluid under high pressure by means of an extruding device.
An appropriate high pressure is used for the injection and the pressure used will in general be dependent on the load rating of the portion (e.g. T-piece) of the fluid conduit to which the extruding device is attached: this operating pressure for example may be about 10,000 p.s.i.
(6895 x 104 KN/m2) but other operating pressures are possible.
According to a further aspect of the present invention apparatus for carrying out the above method comprises a cylinder/plunger device, a discharge means from the cylinder/plunger device for restricted discharge of substance from the device means for actuating the plunger of the device for discharge of substance from a storage zone on one side of the plunger via said discharge means, and means for fitting the cylinder/plunger device to a fluid conduit for the injection of substance into fluid flowing in said conduit.
Preferably the discharge means comprises a nozzle of cone form, and preferably the nozzle is removable for filling of said storage zone of the cylinded/plunger device with injection substance, the plunger being moved to an outer position in the cylinder by or for said filling.
Preferably the cylinder/plunger device is adapted for use with a pipe coupling to enable coupling of the device to said fluid conduit, and more especially the cylinder/plunger device includes a head part adapted for location on a branch inlet pipe portion (e.g. T-piece) of fluid conduit and including means for the fitting of a securing member to secure the device to said branch inlet pipe portion.
Preferably the other side of the plunger communicates with an inlet conduit for actuation of the plunger by a working fluid, and said working fluid can be at high pressure for high pressure operation of the device.
An embodiment of the present invention will now be described by way of example with reference to the accompanying drawings wherein Fig. 1 shows a cross-sectional elevation of a cylinder/plunger device according to the present invention for injecting isotope substance into a fluid of an oil well, Fig. 2 shows in part section the cylinder/plunger device secured to a branch of a T-piece fitted in a fluid conduit: and Fig. 3 is a modification in cross-sectional view.
Referring to Figs. 1 and 2 of the drawings, the cylinder/plunger device 1 shown is especially intended for injecting by extrusion isotope substance into a well fluid, which isotope substance comprises radioactive solid particles located in a gel carrier. The device 1 comprises a cylinder 2 with a plunger 3 movable therein, the cylinder 2 and plunger 3 being machined for operation as an effective piston-cylinder unit, while sealing rings 4 are present between the plunger 3 and the cylinder 2. A frusto-conical discharge nozzle 5 is removably secured to the outer end of the cylinder 2 by means of screws 6.
The device 1 is intended for fitting into a fluid pipeline carrying well fluid. Thus Fig. 2 shows a T-piece 7 intercalated by pipe couplings 9 in a fluid conduit 8 carrying well fluid, and the device 1 is shown fitted to a branch 7A of the T-piece 7 for injection of isotope substance into the fluid conduit 8. To facilitate fitting to the branch 7A, the device 1 includes a head 10 in the form of a male plug for location in a frusto-conical surface llA of the branch 7A, the head 10 limiting outward movement of the plunger 3. A frusto-conical surface llB of the head 10 mates accurately with the surface llA to enable high pressure operation of the device 1. A coupling nut 12 secures the head 10 (and the device 1) to the branch 7A such that the surfaces llA/llB are in tight sealing engagement.
A bore 13 in the head 10 comunicates with the outer side of the plunger 3 for the supply of high pressure working fluid to the plunger, while a ring 14 welded to the head 10 facilitates the fitting of a hose (not shown) supplying high pressure fluid to the bore 13. As stated, a solid isotope (i.e. radioactive solid particles) is used and this is suspended in a carrying medium in the form of a gel thereby facilitating the flow of the solid isotope (i.e.
proppant) when injected by the device 1. A suitable gel is the substance known as swarfega and advantageously the solid radioactive particles are suspended substantially uniformally in the gel and without substantial contact between the particles. The radioactive solid particles may have the consistency of fine sand.
OPERATION.
To use the device 1, the above isotope substance is placed in the cylinder 2 and against the inner side of the plunger 3, the nozzle 5 being removed to facilitate filling, and a maximum storage zone S (i.e. with the plunger 3 abutting the head 10) is preferably filled with the isotope substance: the nozzle 5 is then refitted by means of screws 6. The device 1 is fitted securely to the T-piece 7 by means of the coupling nut 12, and preferably the whole assembly is now pressure tested to an appropriate pressure e.g. to 10,000 p.s.i. (6.895 x 104 KN/m2) to check the integrity of the assembly. With the T-piece 7 fitted in the conduit 8, an hydraulic hose is connected to the top of the head 10 for the supply of working fluid to the plunger 3.When the isotope is required to be injected into the well fluid flow lines, i.e. conduit 8, hydraulic pressure is applied to the outer side (back) of the plunger 3 via the hose and the bore 13, for example, by means of a stroke on a hydraulic pump (not shown). Consequently the plunger 3 is displaced by a precise increment, and a precise amount of isotope substance is extruded through the nozzle 5 and into the flow line 8. Therefore, by means of the above isotope injecting system in accordsnce with the present invention, solid isotope particles can be injected conveniently and effectively into a well fluid as required.
By way of example, the device 1 for use with a T-piece having a branch bore of 1.75 ins (44.45 mm) could have a cylinder length of about 123 mm a cylinder 0/D of 43 mm and a cylinder I/D of 27 mm.
Modifications are of course possible. For example, the injecting device 1 could take some other form and in particular the isotope discharge 5 of the device could be changed but still be within the scope of the invention.
The device 1 may be fitted to a different branch of the Tpiece 7 i.e. so as to be located at an elbow of the flow line 8.
It would be possinle for the injection device 1 to be used purely with radioactive solid particles i.e. without the carrier gel, but for this use it may be preferable for the discharge 5 to take some other form. Thus in Fig. 3 instead of the discharge nozzle 5 a moveable closure plate 15 is used urged into closure by springs 16. Application of hydraulic pressure to the plunger 3 acting on stored particles in the zone S causes the plate 15 to open (shown dashed) against the springs 16 to release a quantity of solid particles for injection.
Claims (14)
1. An isotope injection substance for injection into a well fluid comprising radioactive solid particles suspended in a carrier comprising a gel or other semi-viscous material.
2, An isotope injection substance as claimed in claim 1, wherein the radioactive solid particles are placed substantially uniformally in the carrier.
3. An isotope injection substance as claimed in claim 2, wherein the particles are located in the carrier so as to mitigate against substantial contact between the particles.
4. An isotope injection substance as claimed in any one of the preceding claims, wherein the radioactive solid particles have the consistency of sand.
5. An isotope injection substance as claimed in claim 1 and substantially as hereinbefore described.
6. A method of injecting radioisotopes into a fluid comprising extruding an isotope injection substance as claimed in any one of the preceding claims into a fluid under high pressure by means of an extruding device.
7. Apparatus for carrying out the method of claim 5 comprising a cylinder/plunger device, a discharge means from the cylinder/plunger device for restricted discharge of substance from the device, means for actuating the plunger of the device for discharge of substance from a storage zone on one side of the plunger via said discharge means, and means for fitting the cylinder/plunger device to a fluid conduit for the injection of substance into fluid flowing in said conduit.
8. Apparatus as claimed in claim 7, wherein the discharge means comprises a nozzle of cone form.
9. Apparatus as claimed in claim 7 or 8, wherein the nozzle is removable for filling of said storage zone of the cylinder/plunger device with injection substance, the plunger being moved to an outer position in the cylinder by or for said filling.
10. Apparatus as claimed in any one of claims 7 to 9, wherein the cylinder/plunger device is adapted for use with a pipe coupling to enable coupling of the device to said fluid conduit.
11. Apparatus as claimed in claim 10, wherein the cylinder/plunger device includes a head part adapted for location on a branch inlet pipe portion (e.g. T-piece) of fluid conduit and including means for the fitting of a securing member to secure the device to said branch inlet pipe portion.
12. Apparatus as claimed in any one of claims 7 to 11, wherein the other side of the plunger communicates with an inlet conduit for actuation of the plunger by a working fluid of suitable pressure.
13. A method of injecting radioisotopes into a fluid as claimed in claim 6, and substantially as hereinbefore described.
14. Apparatus for injecting radioisotopes into a fluid substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9301539A GB2276030A (en) | 1993-01-27 | 1993-01-27 | Isotope injection substance, injection method and injector therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9301539A GB2276030A (en) | 1993-01-27 | 1993-01-27 | Isotope injection substance, injection method and injector therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9301539D0 GB9301539D0 (en) | 1993-03-17 |
| GB2276030A true GB2276030A (en) | 1994-09-14 |
Family
ID=10729361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9301539A Withdrawn GB2276030A (en) | 1993-01-27 | 1993-01-27 | Isotope injection substance, injection method and injector therefor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2276030A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015085855A1 (en) * | 2013-12-13 | 2015-06-18 | 中国工程物理研究院核物理与化学研究所 | Isotope labeling testing method at water outlet portion of high water-cut horizontal well |
| CN105735975A (en) * | 2013-12-13 | 2016-07-06 | 中国工程物理研究院核物理与化学研究所 | Isotope labeling test method for water outlet part of high-water-content horizontal well |
| WO2022122160A1 (en) * | 2020-12-10 | 2022-06-16 | Proserv Uk Ltd | Injection apparatus and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB253207A (en) * | 1925-03-13 | 1926-06-14 | Axel Rudolf Blomberg | Radio-active compresses and a preparation for use in the manufacture thereof |
| GB805385A (en) * | 1955-10-07 | 1958-12-03 | Bendix Aviat Corp | Preparation of radioactive oil with a radioactive halogen |
| US4799552A (en) * | 1987-07-09 | 1989-01-24 | Gulf Nuclear, Inc. | Method and apparatus for injecting radioactive tagged sand into oil and gas wells |
-
1993
- 1993-01-27 GB GB9301539A patent/GB2276030A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB253207A (en) * | 1925-03-13 | 1926-06-14 | Axel Rudolf Blomberg | Radio-active compresses and a preparation for use in the manufacture thereof |
| GB805385A (en) * | 1955-10-07 | 1958-12-03 | Bendix Aviat Corp | Preparation of radioactive oil with a radioactive halogen |
| US4799552A (en) * | 1987-07-09 | 1989-01-24 | Gulf Nuclear, Inc. | Method and apparatus for injecting radioactive tagged sand into oil and gas wells |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015085855A1 (en) * | 2013-12-13 | 2015-06-18 | 中国工程物理研究院核物理与化学研究所 | Isotope labeling testing method at water outlet portion of high water-cut horizontal well |
| CN105735975A (en) * | 2013-12-13 | 2016-07-06 | 中国工程物理研究院核物理与化学研究所 | Isotope labeling test method for water outlet part of high-water-content horizontal well |
| CN105735975B (en) * | 2013-12-13 | 2019-04-23 | 中国工程物理研究院核物理与化学研究所 | High water cut horizontal well outlet part Bit Parity element labeled test method |
| US10280736B2 (en) | 2013-12-13 | 2019-05-07 | Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics | Logging method for locating watered zone in horizontal well with high watercut problem by isotope labeling |
| WO2022122160A1 (en) * | 2020-12-10 | 2022-06-16 | Proserv Uk Ltd | Injection apparatus and method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9301539D0 (en) | 1993-03-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |