WO2008148412A1 - Dispositif de pompage et procédé d'essai à horizon de test dans des conduites d'eau - Google Patents

Dispositif de pompage et procédé d'essai à horizon de test dans des conduites d'eau Download PDF

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Publication number
WO2008148412A1
WO2008148412A1 PCT/EP2007/005086 EP2007005086W WO2008148412A1 WO 2008148412 A1 WO2008148412 A1 WO 2008148412A1 EP 2007005086 W EP2007005086 W EP 2007005086W WO 2008148412 A1 WO2008148412 A1 WO 2008148412A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill string
pump
water
pumping device
drill
Prior art date
Application number
PCT/EP2007/005086
Other languages
German (de)
English (en)
Inventor
Manfred Bernardi
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
Priority to PCT/EP2007/005086 priority Critical patent/WO2008148412A1/fr
Publication of WO2008148412A1 publication Critical patent/WO2008148412A1/fr

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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling
    • 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
    • E21B49/084—Obtaining fluid samples or testing fluids, in boreholes or wells with means for conveying samples through pipe to surface

Definitions

  • the invention relates to a pumping device with an underwater pump for conveying water from a drill string, wherein the underwater pump is lowered in a drill pipe of the drill string and connected to a pump riser leading in the direction of surface.
  • the present invention relates to a method for testing a water-carrying Verprüungsungshorizontes means of a pumping device, wherein a drill string is sunk to the depth of the Verprüungsungshorizontes, wherein a submersible pump of the pumping device in a drill pipe of the drill string under a pending in the drill string Oxfordwasserhorizont or a Beharrungswasserapt in Drill strand is lowered and wherein the underwater pump via a pump riser a stream of water from the drill string taken and promoted in the direction of overground.
  • a drill bit arranged at the end of a drill string is first driven into the ground in a drilling operation.
  • the drill string has a drill string and a filter tube connected to the drill bit.
  • the drill head has at least one drilling tool.
  • a drilling fluid is led to the bottom of the borehole through an inner drill pipe channel and the filter pipe so that the boring tool passes and partly also directly over the filter pipe the drilling fluid exits into the annular gap and thereby absorb the cuttings and can dispense over the annular gap to surface.
  • the drilling fluid Through the drilling fluid the formation of a filter cake on the borehole wall is effected which stabilizes the borehole.
  • the drill drive is disconnected from the drill string and an underwater pump is lowered into the drill string or inner drill pipe channel.
  • filter gravel or a similar filter material is introduced until just above the filter tube into the annulus between the borehole wall and the drill string.
  • the negative pressure caused after the underwater pump has been operated results in the formation of a barrier layer at the separation level between the filter gravel and the drilling fluid, the barrier layer being comparable to the filter cake formed on the borehole wall during the drilling process. This separates the drill hole into two sections, whereby the test horizon in the area of the filter tube is exactly separated from the overlying drill hole.
  • the drilling fluid purged in the drill pipe and in the filter pipe after a drilling operation is conveyed together with a stream of water from the testing horizon in the direction of above ground, finally forming a still water horizon or a water level in the drill pipe, the height of which depends on the Preloading the water horizon or the pressure in the water-bearing soil layer and the flow rate, which is conveyed by means of the underwater pump from the drill string to the surface.
  • the resting water horizon is lowered, with the necessary post-flow time determining the delivery rate, which can be taken from the testing horizon.
  • the drilling process can be resumed, wherein in the known method first the underwater pump is retrieved from the drill string and the drill drive is fixed again to the drill string. Subsequently, drilling mud from overground is conveyed through the inner drill pipe channel in the direction of underground. The drilling fluid passes in the region of the filter tube and past the drill head in the annular gap between the borehole wall and the drill string, so that the barrier layer is broken at the separation level and the filter gravel is discharged from the annulus together with the drilling fluid after days.
  • a disadvantage of the method described above is that the resting water horizon in the drill pipe can fall below the Ansaubiee the underwater pump in the water production, provided that the flowing from the Verprobungs- horizon in the drill string water quantity is smaller than the delivery volume of the underwater pump. If the resting water horizon drops below the intake level of the underwater pump, the delivery is interrupted and, if necessary, the underwater pump must be lowered further into the drill string, which, however, is only possible to a limited extent. In the known method is also a disadvantage that for a continuation of the drilling process after a removal of water from the drill string, the underwater pump must be recovered from the drill string, which is time-consuming and labor-intensive.
  • Object of the present invention is to provide a pumping device and a method for testing a water-carrying Verprümiesungshorizontes each of the aforementioned type, a multiple-sample in a wellbore should be feasible in a simple manner and inexpensively.
  • a arranged between the pump riser and the underwater pump medium exchanger unit is provided that the medium exchanger unit has at least one connecting the pump riser with the underwater pump Mediumtrauschleirung that in the medium thinning line at least a delivery valve which blocks the passage in the direction of flow from the pump riser to the underwater pump is provided, that at least one purge line connected to the medium exchanger line in the conveying direction to the pump riser above the delivery valve and opening into the drill string is provided in the purge line Flow direction from the flushing line into the medium - A -
  • the underwater pump does not have to be recovered from the drill string, but remains in the drill string.
  • the drilling process can be resumed immediately after a sampling, which allows simple and cost-effective multiple testing of different water-carrying test horizons.
  • the drilling fluid in the area of the underwater pump is introduced into the drill string or into the inner drill rod channel via the pump riser, which causes the drill string or the inner drill string channel to fill up with the drilling fluid from below in the direction of above ground.
  • the pump riser causes the drill string or the inner drill string channel to fill up with the drilling fluid from below in the direction of above ground.
  • the water in the drill string is discharged within the drill string in the direction of above ground.
  • the exchange of water for drilling fluid is carried out by pumping back via the pump riser with a correspondingly increased pressure until all the water is pressed out of the drill string.
  • the drill string When the drill string is completely filled with drilling mud, the drill string is sealed off with a preventer so that further backwashing of drilling mud via the pump riser into the drill string causes the drilling mud to pass through the drill string into the annulus between the well wall Bohrstrang is discharged. This then leads as in the known method to a destruction of the barrier layer and to a discharge of the filter bed from the annulus out. Then the drilling can be continued.
  • the invention thus makes it possible to replace the remaining after a sampling in the drill string water with a flushing medium, without the stability of the continuing bore is compromised. As a result, a controlled Mehrfachverprobung a well in different depths readily possible.
  • the delivery valve may preferably be a non-releasable check valve and the backwash valve may be a spring-loaded check valve.
  • the spring force of the backwash valve is chosen so that upon reaching a predetermined pressure level, the valve opens in the locked direction and can be flowed through.
  • the delivery valve serves to determine the direction of the flow within the medium exchanger line and allows the passage of water from the underwater pump to the pump riser, but automatically blocks the passage of drilling fluid from the pump riser in the direction of the underwater pump.
  • the backwash valve may preferably be releasable at a pressure in the medium exchanger line of greater than 25 bar, in particular of approximately 30 bar. It is assumed that the delivery pressure of the underwater pump is usually a maximum of 25 bar.
  • the drilling fluid can be conveyed at a pressure of about 40 bar from above the pump riser in the direction of underground, so that there is an unlocking of the backwash valve. The drilling fluid then exits through the flushing line into the drill string or into the inner drill pipe channel.
  • the differential pressure between the pressure required to unlock the backwash valve and the pressure in the medium thawing line should be at least 5 bar.
  • the pumping device to be arranged a surface measuring and control device for measuring the height of a pending at a water extraction from the drill string in the drill string Oxfordwasserhorizontes and to control the flow rate of the underwater pump in dependence from the measured height of the Oxfordwasserhorizontes has.
  • at least one water level measuring device is provided for measuring the level of the quiescent water horizon, wherein, preferably, the water level measuring device can be arranged on the medium exchanger unit.
  • the water level measuring device may have a correspondingly formed ultrasonic sensor system, which allows monitoring of the water horizon up to a distance of 200 m.
  • a display device arranged above it is provided for displaying the measured height of the quiescent water horizon. This makes it possible to continuously measure, monitor and optionally record the level of the quiescent water horizon in the drill pipe while pumping water. In from- Dependent on the measured height of the resting water horizon in the drill pipe, the delivery rate of the underwater pump is then adjusted or controlled. Thereby, a lowering of the Oxford volleyballhorizontes be prevented in the drill string below the Ansaubiee the underwater pump.
  • the pump riser can be connected to a flushing pump.
  • the flushing pump should preferably be designed for conveying the drilling fluid at a pressure of about 35 to 50 bar, preferably of about 40 bar. It is understood that the flushing pump may have appropriate means to adjust the pressure of the drilling fluid on the one hand and / or the purge flow on the other hand, if necessary.
  • the underwater pump can be operated in a floating manner, wherein the underwater pump is lowered below the resting water horizon in the drill string. In this case, however, the underwater pump is not connected to the filter tube provided at the lower end of the drill string. In cases where the filter tube is immersed in a drilled water horizon, however, it may also be provided that the underwater pump can be connected in a fluid-tight manner with respect to the inner drill pipe channel with a filter tube arranged at the lower end of the drill string, which results in direct delivery of water allows the filter tube from a borehole. It can thereby be ensured that an uninterrupted fluid-communicating connection between the water-conducting sampling horizon and the underwater pump is ensured. As a result, the underwater pump directly sucks the water in the test horizon via the filter tube.
  • FIGURE of the drawing shows a partial cross-sectional view of a drill string 1 introduced into a borehole for testing a water-bearing soil layer.
  • the drill string 1 has at its lower end a filter tube 2 with a plurality of Filteröffhungen 3.
  • the filter tube 2 is connected at one end to a drill pipe 4 of the drill string 1.
  • the filter tube 2 is connected to a drilling tool (not shown).
  • An underwater pump 5, which is connected to a pump riser 6, is lowered into the drill string 4.
  • a medium exchanger unit 7 is provided which has a medium thawing line 8.
  • the medium exchanger line 8 connects the pump riser 8 to a suction line 9 of the underwater pump 5.
  • the medium exchanger unit 7 is provided to replace the water remaining in the drill pipe 4 by a drilling fluid 10 after a sampling of water and thereby to ensure the stability of the continuing bore. This will be discussed in more detail below.
  • the medium exchanger unit 7 has a delivery valve 11 which blocks the passage in the flow direction from the pump riser 6 to the underwater pump 5.
  • the medium exchanger line 8 is connected in the conveying direction to the pump riser 6 above the delivery valve 11 with a purge line 12, which opens into an inner drill pipe 13 of the drill pipe 4.
  • a backwash valve 14 blocking the passage in the flow direction from the scavenging line 12 into the medium exchanger line 8 is arranged, wherein the backwash valve 14 can be unlocked as a function of the pressure in the medium exchanger line 8.
  • the drill string 1 is lowered with the drill head provided at the end of the filter tube 2 until the filter tube 2 is arranged in the region of the test horizon 15.
  • an annular gap 16 between an inner borehole wall 17 and the drill string 1 is formed.
  • the drilling fluid 10 is introduced into the annular gap 16 via the drill pipe channel 13 and the filter openings 3 and via the drilling tool, not shown, in the region of the borehole bottom.
  • the drilling fluid 10 rises in the annular gap 16 in the direction of the surface, wherein together with the drilling fluid 10 dissolved drill cuttings are applied to overground.
  • the drilling fluid 10 causes the formation of a filter cake on the inner borehole wall 17, which stabilizes the borehole.
  • a drill drive not shown, separated from the drill string 1 and the underwater pump 5 is lowered into the drill pipe 4.
  • a filter material is filled until just above the filter tube 2 into the annulus 16 of above ground.
  • the submersible pump 5 has been lowered into the drill string 1, it is put into operation, wherein the pending in the drill string 1 drilling fluid 10 is sucked together with a nachströmenden from the Verkoustungshorizont 15 water flow 18.
  • a barrier layer is formed at the separation plane between the filter material and the drilling fluid 10 present in the annular gap 16 above the filter material.
  • the bias of the backwash valve 14 preferably corresponds to a pressure in the medium exchanger line 8 of about 30 bar, which ensures at a maximum discharge pressure of 25 bar that no water flows back through the purge line 12 in the drill pipe channel 13 during conveying.
  • drilling fluid 10 is conveyed by means of a pump-down line 6, not shown, in the direction of underground, whereby the delivery pressure may be about 40 bar.
  • the delivery pressure of the drilling fluid 10 leads to an unlocking of the backwash valve 14 so that the drilling fluid 10 on the Flushing line 12 exits into the drill pipe channel 13 and the pending in BohrgestCodeekanal 13 water is displaced from the BohrgestMinekanal 13 in the direction of surface.
  • the drilling fluid 10 is introduced as a result in the area of the underwater pump 5 in the drill string 1 and fills the drill string 1 from bottom to top.
  • the drill string 1 is closed with a preventer (not shown). Further promotion of drilling fluid 10 in the drill string 1 causes the drilling fluid 10 exits through the Filteröffhungen 3 of the filter tube 2 into the annular gap 16 and there causes an expansion of the barrier layer and the filter bed. Since the remaining after a sampling in the drill string 1 water is not discharged through the annular gap 16, but at least substantially over the drill string 1 after surface, it comes in connection with the continuation of the drilling process not to destabilization of the borehole.
  • a supply line 20 for the medium exchanger unit 7 and the underwater pump 5 is provided.
  • a measuring and control device is arranged in order to ensure, when removing water from the drill string 1, that the quiescent water horizon 19 or the water level in the drill rod channel 13 does not fall below an intake level of the underwater pump 5.
  • the medium exchanger unit 7 has for this purpose a water level measuring device 21, which is designed to measure the height of the quiescent water horizon 19.
  • the measuring and control device has a display device, which is likewise arranged above ground, for displaying the measured height of the quiescent water horizon. This makes it possible to adjust the delivery rate of the underwater pump 5 as a function of the bias of the Verismeshorizontes 15. This can be ensured that only the amount of water from the drill string 1 is always removed, which flows from the Verko touchungshorizont 15 in the drill string 1.
  • the medium exchanger unit 7 is a fixed component of the underwater pump 5 and flanged to the upper part of the underwater pump 5.
  • the underwater pump 5 is operated floating, wherein the underwater pump 5 is disposed above the filter tube 2 and not connected to this.
  • the underwater pump 5 and the filter tube 2 substantially ge compared to the drill pipe channel 13 can be connected to each other liquid-tight.
  • the underwater pump 5 has a cone-shaped connection region 22 with sealing means and the filter tube 2 has a corresponding counterpart 23 which is integrated in a connecting thread of the filter tube 2.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (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)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un dispositif de pompage comprenant une pompe submersible (5) de refoulement d'un courant d'eau (18) à partir d'un tubage (1), la pompe submersible (5) pouvant être abaissée dans un tube de forage (4) du tubage (1) et étant connectée avec une conduite ascendante (6) de la pompe. L'invention est caractérisée en ce qu'il est prévu une unité échangeuse de milieu (7), disposée entre la conduite ascendante (6) de la pompe et la pompe submersible (5), l'unité échangeuse de milieu 87) présente au moins une conduite échangeuse de milieu (8) raccordant la conduite ascendante (6) de la pompe avec la pompe submersible (5); il est prévu dans la conduite échangeuse de milieu 88), au moins une soupape de refoulement (11) bloquant le passage en direction de l'écoulement de la conduite ascendante (6) de la pompe vers la pompe submersible (5); il est prévu au moins une conduite de balayage (12) raccordée avec la conduite échangeuse de milieu (8), en amont de la soupape de refoulement (11), dans le sens du transport vers la conduite ascendante (6) de la pompe, et débouchant dans le tubage (4), et il est prévu dans la conduite de balayage (12), au moins une vanne de lavage à contre-courant (14) qui bloque le passage en direction de l'écoulement à partir de la conduite de balayage (12) vers la conduite échangeuse de milieu (8), et la vanne de lavage à contre-courant (14) peut être débloquée en fonction de la pression régnant dans la conduite échangeuse de milieu (8).
PCT/EP2007/005086 2007-06-08 2007-06-08 Dispositif de pompage et procédé d'essai à horizon de test dans des conduites d'eau WO2008148412A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/005086 WO2008148412A1 (fr) 2007-06-08 2007-06-08 Dispositif de pompage et procédé d'essai à horizon de test dans des conduites d'eau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/005086 WO2008148412A1 (fr) 2007-06-08 2007-06-08 Dispositif de pompage et procédé d'essai à horizon de test dans des conduites d'eau

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WO2008148412A1 true WO2008148412A1 (fr) 2008-12-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109269842A (zh) * 2018-11-07 2019-01-25 中国矿业大学(北京) 用于获取不同层位胶结充填料浆的取样装置及其工作方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968256A (en) * 1957-04-29 1961-01-17 Clifford C Williams Pump adapter
DE3147935A1 (de) * 1981-12-03 1983-06-30 Klaus Dipl.-Ing. 4300 Essen Esters Verfahren und vorrichtung zur herstellung von grundwasserbrunnen und zur grundwasserabsenkung
DE4133790A1 (de) * 1991-10-11 1993-04-15 Josef Grotendorst Verfahren zur erprobung von grundwaessern, insbesondere auch von kontaminierten grundwaessern und vorrichtung
DE202004013350U1 (de) * 2004-08-20 2004-10-21 Gfi Grundwasserforschungsinstitut Gmbh Dresden Vorrichtung zur verfälschungsfreien teufenbezogenen Entnahme von Grundwasserproben
WO2006117008A1 (fr) * 2005-04-28 2006-11-09 Edi Exploration Drilling International Gmbh 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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968256A (en) * 1957-04-29 1961-01-17 Clifford C Williams Pump adapter
DE3147935A1 (de) * 1981-12-03 1983-06-30 Klaus Dipl.-Ing. 4300 Essen Esters Verfahren und vorrichtung zur herstellung von grundwasserbrunnen und zur grundwasserabsenkung
DE4133790A1 (de) * 1991-10-11 1993-04-15 Josef Grotendorst Verfahren zur erprobung von grundwaessern, insbesondere auch von kontaminierten grundwaessern und vorrichtung
DE202004013350U1 (de) * 2004-08-20 2004-10-21 Gfi Grundwasserforschungsinstitut Gmbh Dresden Vorrichtung zur verfälschungsfreien teufenbezogenen Entnahme von Grundwasserproben
WO2006117008A1 (fr) * 2005-04-28 2006-11-09 Edi Exploration Drilling International Gmbh 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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109269842A (zh) * 2018-11-07 2019-01-25 中国矿业大学(北京) 用于获取不同层位胶结充填料浆的取样装置及其工作方法
CN109269842B (zh) * 2018-11-07 2023-10-27 中国矿业大学(北京) 用于获取不同层位胶结充填料浆的取样装置及其工作方法

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