EP1875043A1 - Procede et dispositif de prelevement d'echantillon destines a l'extraction d'un fluide d'echantillon contenant de l'eau et/ou du petrole et/ou du gaz et/ou un solide a partir d'un trou de forage - Google Patents

Procede et dispositif de prelevement d'echantillon destines a l'extraction d'un fluide d'echantillon contenant de l'eau et/ou du petrole et/ou du gaz et/ou un solide a partir d'un trou de forage

Info

Publication number
EP1875043A1
EP1875043A1 EP05742312A EP05742312A EP1875043A1 EP 1875043 A1 EP1875043 A1 EP 1875043A1 EP 05742312 A EP05742312 A EP 05742312A EP 05742312 A EP05742312 A EP 05742312A EP 1875043 A1 EP1875043 A1 EP 1875043A1
Authority
EP
European Patent Office
Prior art keywords
medium
flushing medium
valve unit
sampling
unit
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Withdrawn
Application number
EP05742312A
Other languages
German (de)
English (en)
Inventor
Gerhard Grotendorst
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.)
EDI Exploration Drilling International GmbH
Original Assignee
EDI Exploration Drilling International GmbH
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.)
Filing date
Publication date
Application filed by EDI Exploration Drilling International GmbH filed Critical EDI Exploration Drilling International GmbH
Publication of EP1875043A1 publication Critical patent/EP1875043A1/fr
Withdrawn legal-status Critical Current

Links

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
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells

Definitions

  • the invention relates to a method for obtaining a water and / or oil and / or gas and / or solids-containing sample medium from a well with the aid of a above a drilling device arranged sampling device of a drill string, wherein during a drilling operation, a flushing medium via the sampling device in an annular gap is conveyed between a borehole wall of the borehole and an outer wall of a drill pipe of the drill string in the direction of above days, wherein during sampling a sample medium is taken from a sampling unit of the sampling device and conveyed via the drill string in the direction of above ground and wherein the drill string during sampling in the borehole remains.
  • the invention relates to a sampling device for removing a water and / or oil and / or gas and / or solids-containing sample medium from a wellbore.
  • a method of the aforementioned type is already known from DE 43 18 736 Al.
  • a drill bit provided with corresponding carbide parts which forms the forward end of a drill pipe, is driven into the ground by means of a drilling rig.
  • flushing is usually performed through the inner drill pipe channel to the bottom of the hole, so that the liquid can pick up the drill cuttings and bring them to surface on the bit or drill head. There, both are separated again, so that the drilling fluid can be used again.
  • the flushing medium causes the formation of a filter cake on the borehole wall which stabilizes the borehole.
  • Such holes are introduced into the ground, for example, to drill and win drinking water.
  • the wellbore is separated into a well removal section and a wellbore stabilization section.
  • the filter medium is introduced into the wellbore through an inlet filter section from top edge terrain via the annular gap.
  • the filter medium is preferably entered together with a flushing medium via the annular gap.
  • the filter medium settles in the annular gap and forms a filter bed in the borehole removal section, while the flushing medium is conveyed to the surface after settling of the filter medium via the drill string.
  • the flushing medium level is lowered in the drill string before and during the sampling operation with suitable conveying means, for example with an underwater pump or with compressed air, wherein the flushing medium is discharged to the upper edge of the terrain.
  • suitable conveying means for example with an underwater pump or with compressed air
  • the flushing medium is discharged to the upper edge of the terrain.
  • Fine particles of the mud suspension and minimal residual drillings in the annular gap penetrate by sedimentation and the delivery pressure of the flushing medium in the annular gap in the upper portion of the filter bed, wherein the pore volume of the filter medium fills and a ring seal or a separating plane is formed, which seals the wellbore stabilization section relative to the well removal section ,
  • the thickness of the parting line depends on the content of fines in the flushing medium and on the content of minimum residual drillings. Since the drill string and the annular gap surrounding the drill string are tubes communicating with one another, a differential pressure to the annular gap forms during the lowering of the flushing medium level in the drill string, which likewise influences the formation and the thickness of the parting plane.
  • the thickness of the parting line is controlled by the differential pressure and also depends on the period of sedimentation.
  • the thickness of the parting line can be approx. 0.4 m to 0.6 m.
  • the differential pressure between the drill string and the annular gap that forms in the drill string when the flushing medium level is lowered results in subsequent flow of sample medium in the area of the borehole removal portion.
  • the sample medium is conveyed through the filter bed and a sampling unit of the sampling device in the drill string.
  • a pressure equalization between the wellbore stabilization section and the drill string is not possible, since the filter bed in the region of the parting plane is completely added with fine and silty parts, and optionally with cellulose fractions of the flushing medium.
  • the bore is thus secured vertically by the formation of a filter cake on the borehole wall and horizontally by the clogging of the filter bed.
  • the drill string used which served as a delivery line for the sample medium, filled with the sample medium.
  • it is provided in the known from DE 43 18 736 Al method to initiate before resuming the Bohr worries from above into the pending in the drill string sample medium flushing medium or to press in.
  • the mixture of flushing medium and sample medium present in the drill string is pumped or conveyed through the drilling apparatus in the area of the borehole bottom into the annular space.
  • Object of the present invention is to develop a method of the type mentioned in such a way that it is possible to stop a drilling operation for sampling and to continue, without causing the aforementioned disadvantages, to perform a sampling in any well depths can ,
  • the invention is based on the basic idea that the formation of pressure differences between the drill string and the annular gap can be almost completely prevented by an exchange of the pending in the drill string sample medium by flushing medium. Another Abteuf ung the bore is therefore possible in a simple manner, without causing damage to the borehole as a result of pressure differences between the drill string and the annular gap.
  • the flushing medium usually has a higher density than the sample medium, the risk that it may lead to a piston-like drop in the separation level when ascending the flushing medium in the annular gap with the disadvantages described above for the wellbore according to the invention is very low.
  • the inventively provided essentially complete media exchange allows it if necessary, that even after the media exchange that sample medium in the drill string still pending over a length of 1 m to 5 m, preferably from 2 m to 3 m.
  • the sample medium is displaced from the drill string in the direction of overground starting from an area near the bottom hole in the media exchange.
  • the replacement of the sample medium by flushing medium thus takes place from bottom to top, with the sample medium being discharged to the top edge area.
  • the sample medium is displaced by rising in the drill string flushing medium, in such a way that there is essentially no mixing between the sample medium and the flushing medium.
  • the invention allows the sample medium to be pumped off in the upper region of the drill string. As a result, contamination of the flushing medium by sample medium is largely excluded.
  • the flushing medium above a dividing line preferably enters the drill string via a media exchanger unit of the sampling device and is conveyed in the direction of above ground within the drill string.
  • the parting line can in particular receive be by conveying the flushing medium together with a filter medium through the annular gap in the direction of the borehole bottom after completion of a drilling operation, wherein the filter medium settles in the region of the sampling device and forms a filter bed and the flushing medium is conveyed to the drill string after transfer and wherein by lowering the Medium level in the drill pipe in the upper region of the filter bed, the separation plane is formed, which separates the wellbore in a arranged below the parting plane well removal section and in a above the parting plane arranged well stabilization section.
  • the media exchanger unit can be shut off from the sampling unit by one or more valves, which ensures that it can not lead to a removal of the filter bed and the destruction of the separation level during the media exchange, as long as the sample still exists in the drill string.
  • flushing medium is conveyed through the drill string in the direction of the borehole, wherein the flushing medium enters the annular gap via the sampling device and wherein the flushing medium is conveyed in the annular gap to above ground. Due to the greater density of the flushing medium, a piston-like lowering of the parting plane is made more difficult during the subsequent discharge of the parting plane via the annular gap. Rather, it comes to the rise of the parting plane in the annular gap, together with parts of the filter bed.
  • the flushing medium is conveyed with a partial load flow rate of 20% to 60%, preferably 40%, of the volume flow delivered during the drilling process at full load. It is preferably begun with the destruction of the parting line as soon as the media exchange is completed, ie, as soon as substantially all of the sample medium in the drill string has been replaced by flushing medium.
  • a first partial flow of the rinsing medium can be conveyed into the annular gap via the media exchanger unit of the sampling device after the medium exchange above the parting plane.
  • the stabilization of the borehole removal section can be effected by a second partial flow of the flushing medium, wherein the flushing medium is conveyed via the sampling unit of the sampling device below the parting plane into the annular gap.
  • the second partial flow may be greater than the first partial flow, wherein the first partial flow is preferably conveyed with a partial load flow rate of 10% to 20%, in particular 15%, of the volume flow delivered during the drilling process at full load and wherein the second Partial flow preferably with a partial load flow rate of 20% to 30%, in particular 25%, is promoted.
  • the flushing circuit generates a countercurrent directed from the sampling device in the region of the media exchanger unit, which rises in the annular gap and carries parts of the parting plane.
  • the time-delayed conveying of the first partial flow and the second partial flow can preferably be valve-controlled.
  • no flushing medium is conveyed into the annular gap before the destruction of the parting plane and / or before the essentially complete removal of the parting plane in the region of the boring device.
  • the delivery volume flow of the flushing medium in the drill string is increased to the Vollast stiivolumenstrom during drilling and promoted the flushing medium, at least in the region of the drilling device in the annular gap.
  • the filter bed is then discharged. After adjusting the Vollast stiivolumenstroms the drilling process can be continued.
  • the amount of the supplied filter medium is set in the annular gap as a function of the pressure level of the flushing medium having the filter medium. It is so that with increasing height of the filter bed in the well removal section of the proportion of the purge medium, which preferably can be promoted via the annular gap and the sampling device in the drill string decreases. At constant flow rate, there is therefore an increase in pressure in the annular gap with increasing height of the filter bed. From a measurement of the pressure level in the annular gap can therefore be deduced a statement as to whether the filter bed has reached a sufficient height or whether a larger amount of the filter medium must be supplied to the borehole.
  • the amount of the supplied filter medium is adjusted such that it comes to the formation of the parting plane in a perforationless region of the sampling device, preferably above the sampling unit in the region of the media exchanger unit.
  • FIG. 1 shows a detail of a schematic cross-sectional view of a sampling device according to the invention and 2 - 6: a schematic representation of the method according to the invention for taking a sample medium from a borehole using the sampling device shown in FIG. 1.
  • the structure of the sampling device 1 partially shown in Fig. 1 will be explained and described below with reference to the inventive method shown in FIGS. 2 to 6.
  • the sampling device 1 is shown in the drilling process.
  • the sampling device 1 according to the invention has a sampling unit 3 having filter sections 2 and a media exchanger unit 4 provided above the sampling unit 3.
  • the media exchanger unit 4 likewise has filter sections 5 in the upper region of the sampling device 1, no filter sections 5 being provided in the closure region 6 adjacent to the sampling unit 3 are.
  • the sampling device 1 further has at least one first valve unit 7 in order to shut off the sampling unit 3 with respect to the media exchanger unit 4.
  • a first valve unit 7 may be provided a biased valve, preferably a check valve.
  • the first valve unit 7 is biased so that it comes during the drilling operation for opening the first valve unit 7 in the direction of the sampling unit 3 by the delivery pressure of a for stabilizing the borehole 8 via the media exchanger unit 4 in the direction of the sampling unit 3 funded purge medium 9.
  • a feed pump 10 is provided for conveying the flushing medium 9. This is shown in Fig. 2, wherein the flushing medium 9 is promoted during the drilling process to stabilize the borehole 8 via the sampling device 1 in an annular gap 11 between the borehole wall 12 and outer wall 13 of a drill string 14 of a drill string 15 after surface.
  • the stabilization is achieved by the formation of a filter cake 12a on the borehole wall 12 due to constituents contained in the flushing medium 9 and forming the filter cake 12a. Furthermore, it is shown in FIG. 2 that the flushing medium 9 is conveyed into the annular gap 11 both via a plurality of filter sections 5 of the media exchanger unit 4 and via the filter sections 2 of the sampling unit 3.
  • the media exchanger unit 4 has a first conveying region 16 and a second conveying region 17, wherein the second conveying region 17 is shut off from the first conveying region 16 by a second, preferably preloaded valve unit 18, in particular a non-return valve.
  • the first conveying region 16 has the filter sections 5 in order to allow a transfer of flushing medium 9 from the first conveying region 16 into the annular gap 11 and from the annular gap 11 into the first conveying region 16.
  • the first conveyor region 16 is connected to the drill pipe 14 via auxiliary lines 19 and the second conveyor region 17 to the drill pipe 14 via a main line 20, in particular screwed, which is not shown in detail in Fig. 1.
  • the first valve unit 7 and the second valve unit 18 are opened.
  • the flushing medium 9 flows via the drill pipe 14 and the auxiliary lines 19 into the first conveyor region 16.
  • the flushing medium 9 is conveyed into the annular gap 11.
  • a partial flow of the flushing medium 9 can be supplied from the first conveying region 16 when the valve unit 18 is open via the connecting line 20a to the flushing medium flow conveyed via the main line 20.
  • the second valve unit 18 has a passage opening for the flushing medium flow conveyed via the main line 20.
  • the sampling device 1 on the side facing a drilling device 21 on another valve unit 21a which separates the sampling unit 3 with respect to the borehole bottom, if necessary.
  • the flushing medium 9 is conveyed through the drill string 14 and the sampling device 1 partly to the borehole bottom of the borehole 8 and exits in the region of the boring device 21 through the further valve unit 21a into the annular gap 11.
  • the first valve unit 7 and the second valve unit 18 are preferably opened, wherein flushing medium 9 flows through the filter sections 2, 5 into the annular gap 11.
  • a suspension 23 consisting of the flushing medium 9 and a filter medium is conveyed via the annular gap 11 in the direction of flow. to the bottom of the hole. This is shown in FIG. In this case, the filter medium settles in the region of the sampling unit 3 to form the filter bed 22.
  • the second valve unit 18 is preferably biased such that it during the formation of the filter bed 22 for opening the second valve unit 18 in the direction of the second conveyor region 17 by the delivery pressure of the filter bed 22 during the construction of the filter bed through the annular gap and conveyed through the filter sections 5 in the media exchanger - Unit 4 entering flushing medium 9 comes.
  • the flushing medium 9 enters via the open second valve unit 18 in the second conveying area 17 and is discharged via the drill string 14 to above ground.
  • the annular gap 11 is completed by means of a preventer 31 accordingly.
  • a third valve unit 24 is provided for shutting off the media exchanger unit 4 with respect to the sampling unit 3, preferably a prestressed valve, in particular a check valve.
  • the third valve unit 24 is biased so that it during the formation of a filter bed 22 in the borehole removal portion for opening the third valve unit 24 toward the media exchanger unit 4 by the delivery pressure of the filter bed 22 in the construction of the annular gap 11 funded and the filter sections 2 of the Sampling unit 3 in the sampling device 1 entering flushing medium 9 comes. If the filter medium has settled in a sufficient amount on the borehole bottom and the filter bed 22 has reached a height sufficient to cover the filter sections 2 of the sampling unit 3, the pressure level in the annular gap 11 or for a constant volume flow of the flushing medium. 9 in the annular gap 11 necessary delivery pressure reaches a value at which the pumping operation ends and the feed pump 10 is disabled. The second valve unit 18 and the third valve unit 24 close automatically by bias.
  • the sampling device 1 is shown in the state of sampling. After it has come to the formation of a filter bed 22 in sufficient height, namely to cover preferably the entire filter sections 2 of the sampling unit 3, the flushing medium 9 in the drill pipe 14 initially via a conveyor unit 25 and a pump pensiereeiteitung 25 a promoted to above ground and lowered the flushing medium level in the drill string 14. In the annular gap 11 is above the filter bed 22 sample medium 9 at.
  • the delivery unit 25 is first put into operation at a small removal capacity, whereby the pore volume of the filter bed 22 is added.
  • sample medium 27 is conveyed through the filter bed 22 via the filter sections 2 of the sampling unit 3 into the sampling device 1. In the process, fines are entrained in the area of the borehole removal section.
  • the third valve unit 24 is biased so that it comes during a sampling for opening the third valve unit 24 in the direction of the media exchanger unit 4 by forming due to the lowering of the liquid column in the drill string 14 differential pressure.
  • a transfer of flushing medium 9 is prevented by the filter sections 5 of the media exchanger unit 4 in the second delivery area 17, characterized in that the second valve unit 18 is closed due to the predetermined bias in a sample of sample medium 27 and the annular gap 11 above the parting line 26 pending flushing medium 9 does not generate sufficient pressure force to open the second valve unit 18.
  • a transfer of the flushing medium 9 through the filter sections 5 through the auxiliary lines 19 in the above-arranged drill pipe 14 is prevented by a fourth valve unit 28.
  • the fourth valve unit 28 may be a non-return valve which holds the first delivery area 16 opposite the drilling unit. rod 14 or the overlying drill string 15 shuts off.
  • the fourth valve unit 28 is biased so that it comes during the drilling operation for opening the fourth valve unit 28 in the direction of the first conveying region 16 by the delivery pressure of the conveyed to stabilize the borehole 8 via the drill string 15 flushing medium 9.
  • a transfer from the flushing medium 9 via the fourth valve unit 28 in the direction of the drill pipe 14 is not possible.
  • the third valve unit 24 is biased with a biasing pressure depending on the drilling depth of 1 bar to 15 bar, preferably from 1 bar to 10, wherein it due to the pressure drop in the drill string 14 when lowering it in the drill string 14 pending medium at the sampling to a Opening of the third valve unit 24 comes, and the sample medium 27 is conveyed via the drill pipe 14 to above ground.
  • FIG. 5 shows the media exchange provided in the method according to the invention.
  • the sample medium 27 present in the drill string 15, in particular the sample medium 27 present in the drill string 14, is exchanged for flushing medium 9 before the bore is continued.
  • the annular gap 11 between a wellbore protection tube 29 and the drill string 14 is closed by a preventer 31, wherein the feed pump 10 is arranged to convey flushing medium 9 in a flushing tank 30 and connected via corresponding installations to the annular gap 11.
  • the feed pump 10 is put into operation to pump flushing medium 9 in the annular gap 11, metered in quantity and pressure.
  • the second valve unit 18 is biased so that it during a medium before the drilling process media exchange in the drill string 15 or in the drill string 14 sample medium 27 by flushing medium 9 for opening the second valve unit 18 toward the second conveyor region 17 by the delivery pressure of the media comes through the filter sections 5 of the Me- exchange unit 4 from the annular gap 11 in the first conveyor region 16 entering flushing medium 9.
  • the flushing medium 9 flows through the filter sections 5 of the media exchanger unit 4 into the second conveying region 17 in the direction of above ground, displacing the sample medium 27 pending in the drill pipe 14 to the upper edge terrain.
  • the first valve unit 7 is closed due to the bias, wherein the first valve unit 7 is preferably biased with a bias of 2.5 bar to 10 bar, in particular of 5 bar.
  • the filter sections 5 of the media exchanger unit 4 must be designed such that, on the one hand, the passage of the flushing medium 9 out of the annular gap 11 into the media exchanger unit 4 during the media exchange is ensured.
  • the filter sections 5 of the media exchanger unit 4 are designed such that a counterflow can be generated during the drilling process by the flushing medium flow emerging from the filter sections 5 in order to keep cuttings away from the filter sections 5.
  • the feed pump 10 is put into operation with a partial power of about 40% of the total power to promote flushing medium 9 via the drill pipe 14 in the first conveying region 16 and the second conveying region 17 of the media exchanger unit 4.
  • about 15% to 25%, in particular 20% of the conveyed flushing medium 9 can be conveyed into the first conveying area 16 via the auxiliary services 19, with a smaller proportion, preferably about 10% to 20%, in particular 15%, of the conveyed flushing medium 9 , is conveyed through the filter sections 5 of the media exchanger unit 4 from the first conveyor region 16 into the annular gap 11 and brings the rinsing circuit between the drill pipe 14 and the annular gap 11 in motion. Because not the whole in the first funding area
  • the second valve unit 18 is biased such that it comes to the opening of the second valve unit 18 during the generation of a rinsing cycle before destroying the parting plane 26 as soon as the pressure level in the first conveying region 16 certain compressive force on the valve unit 18 a predetermined biasing force of the valve unit 18 passes.
  • the difference in volume flow between the volume flow of the flushing medium 9 conveyed via the auxiliary lines 19 into the first conveying area 16 and the comparatively smaller volume flow of the flushing medium 9 through the filter sections 5 of the first conveying area 16 into the annular gap 11 is proportional to the height of the necessary prestressing force.
  • the overpressure arising in the first conveying region 16 with the structure of the rinsing cycle leads to an opening of the second valve unit 18, the portion of the rinsing medium 9 conveyed through the filter sections 5 into the annular gap 11 passing through the connecting line 20a when the second valve unit 18 is opened, it unites with the flushing medium 9 present in the second delivery area 17, which leads to an opening of the first valve unit 7.
  • preferably 25% of the amount of flushing medium 9 conveyed by the main pump 10 is present in quantity and pressure in the sampling device 1 above the first valve unit 7.
  • the 25% fraction of the flushing medium 9 delivered by the feed pump 10 during the removal of the parting plane 26 is conveyed through the filter sections 2 of the sampling unit 3 in the region of the borehole removal section through the filter bed 22 in the direction of the borehole wall 12 and penetrates partly into the boring wall , which has been freed from all fines in the process of sampling medium removal.
  • the flushing in of flushing medium 9 in this region of the borehole 8 leads to a stabilization of the borehole wall 12 through the filter cake 12a forming on the borehole wall 12.
  • the flushing medium 9 takes the path of least resistance and begins to ascend in the annular gap 11, wherein the filter bed 22 is broken or erected. loosens and the dividing plane 26 is destroyed.
  • the flushing medium 9 rises further in the annular space 11 and thereby takes parts of the filter bed 22 and parts of the separating plane 26 with the flow path in the direction of the surface.
  • the further valve unit 21a has a greater biasing force than the first valve unit 7 and is biased so that it does not come to an opening of the further valve unit 21a and leakage of flushing medium 9 in the bottom hole area during the stabilization of Bohrlocherit Spotifyabiteses.
  • the feed pump 10 With the rising of the flushing medium 9 in the annular gap 11 or after the destruction of the parting plane 26, the feed pump 10 is raised to 100% power, resulting in an opening of the other valve unit 21 a.
  • the now promoted at 100% overall performance of the pump 10 volumetric flow of the sample medium 9 causes the filter medium is discharged together with cuttings to top edge area in the annular channel 11.
  • the hole is now freed from cuttings and filter medium and is stabilized by the forming on the borehole wall 12 filter cake 12a over the entire length.
  • the comparatively smaller amount of the flushing medium 9 at the beginning of the destruction and Austragungsvorgangs the parting plane 26 is compensated by the opening of the other valve unit 21 a within a few minutes by the main purge of the flushing medium 9.
  • the 40% partial flow of the flushing medium 9 serves only the destruction of the parting plane 26 and the careful removal of the parting plane 26 from top to bottom, and the formation of a filter cake on the borehole wall 12 and thus the well stabilization in the area of the borehole removal section. Subsequently, the drilling process as shown in Fig. 2 can be continued. It is possible to perform one or more sampling at regular intervals, for example, every 100 m, or at any test horizon 31 of the bore.

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  • 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)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention concerne un procédé de prélèvement d'échantillon destiné à l'extraction d'un fluide d'échantillon (27) contenant de l'eau et/ou du pétrole et/ou du gaz et/ou un solide à partir d'un trou de forage (8) à l'aide d'un dispositif de prélèvement d'échantillon (1) d'un train de tiges (15), disposé au-dessus du dispositif de forage (21). Au cours du processus de forage, un fluide de lavage (9) est transporté par l'intermédiaire du dispositif de prélèvement d'échantillon (1) dans un espace annulaire (11) situé entre une paroi (12) du trou de forage (8) et une paroi extérieure (13) d'une tringlerie (14) du train de tiges (15), vers le jour. Au cours d'un prélèvement d'échantillon, un fluide d'échantillon (27) est prélevé par l'intermédiaire d'une unité de prélèvement d'échantillon (3) du dispositif de prélèvement d'échantillon (1), et transporté vers le jour par l'intermédiaire de la tringlerie (14), le train de tiges (15) restant dans le trou de forage (8) au cours du prélèvement d'échantillon. L'invention vise à améliorer un tel procédé de manière à permettre un prélèvement d'échantillon simple à diverses profondeurs de forage, sans risque d'effondrement du trou de forage (8). A cet effet, après le prélèvement d'échantillon, le fluide d'échantillon (27) restant dans le train de tiges (15) est remplacé essentiellement entièrement par le fluide de lavage (9) avant poursuite du processus de forage.
EP05742312A 2005-04-28 2005-04-28 Procede et dispositif de prelevement d'echantillon destines a l'extraction d'un fluide d'echantillon contenant de l'eau et/ou du petrole et/ou du gaz et/ou un solide a partir d'un trou de forage Withdrawn EP1875043A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2005/004581 WO2006117008A1 (fr) 2005-04-28 2005-04-28 Procede et dispositif de prelevement d'echantillon destines a l'extraction d'un fluide d'echantillon contenant de l'eau et/ou du petrole et/ou du gaz et/ou un solide a partir d'un trou de forage

Publications (1)

Publication Number Publication Date
EP1875043A1 true EP1875043A1 (fr) 2008-01-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05742312A Withdrawn EP1875043A1 (fr) 2005-04-28 2005-04-28 Procede et dispositif de prelevement d'echantillon destines a l'extraction d'un fluide d'echantillon contenant de l'eau et/ou du petrole et/ou du gaz et/ou un solide a partir d'un trou de forage

Country Status (2)

Country Link
EP (1) EP1875043A1 (fr)
WO (1) WO2006117008A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008145166A1 (fr) * 2007-05-31 2008-12-04 Edi Exploration Drilling International Gmbh Procédé de forage d'un trou de forage et unité de filtre
WO2008148412A1 (fr) * 2007-06-08 2008-12-11 Edi Exploration Drilling International Gmbh Dispositif de pompage et procédé d'essai à horizon de test dans des conduites d'eau
AU2010278662A1 (en) * 2009-07-28 2012-02-09 Ausdrill Ltd Drill apparatus

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
DE4133790A1 (de) * 1991-10-11 1993-04-15 Josef Grotendorst Verfahren zur erprobung von grundwaessern, insbesondere auch von kontaminierten grundwaessern und vorrichtung
DE4318736A1 (de) * 1993-06-05 1994-12-08 Gerhard Grotendorst Verfahren und Vorrichtung zur Entnahme von Gas- und/oder Öl- und/oder Wasser- und/oder Feststoffproben im Bohrbetrieb
NO309396B1 (no) * 1999-03-30 2001-01-22 Norske Stats Oljeselskap Fremgangsmåte og system for testing av et borehull ved bruk av en bevegelig plugg
GB0024378D0 (en) * 2000-10-05 2000-11-22 Expro North Sea Ltd Improved well testing system

Non-Patent Citations (1)

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See references of WO2006117008A1 *

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