EP0046651A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and apparatus for obtaining selected samples of formation fluids
Assignee: BP Corp North America Inc
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Filing: 1981-08-18
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Granted: —
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Expires: 2001-08-18
Abstract
Abstract A method and apparatus operable on a wireline logging cable for sampling and testing bore hole fluids, transmitting the results obtained from such testing to the surface for determination whether or not the particular sample undergoing testing should be collected and brought to the surface. The apparatus comprises a downhole tool having an inflatable double packer for isolating an interval of the bore hole coupled with a hydraulic pump, the pump being utilized sequentially to inflate the double packer and isolate an interval of the bore hole and to remove fluids from the isolated interval to test chamber means where resistivity, redox potential (Eh) and acidity (pH) are determined, and finally to dispose of selected samples to one or more sample container chambers within said tool or to reject them into the bore hole if not selected.
Inventors
- 👤 Alfred Henry Jageler
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 05:59
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/087; E21B33/00; E21B33/10; E21B33/12; E21B33/124; E21B33/1243; E21B47/00; E21B47/10; E21B47/103; E21B47/113; E21B49/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
124 words
A method for obtaining formation fluid samples from a bore hole which method comprises: a) lowering a tool into said bore hole to a preselected level; b) expanding a pair of packers carried by said tool into sealing contact with said bore hole to isolate an interval of said bore hole,; c) collecting fluid entering said isolated interval and measuring a property thereof; d) determining on the basis of the measured property whether it is desired to retain a sample of said collected fluid and, if the determination is positive, transferring said fluid to a sample collection chamber within said tool; e) contracting said packers to free said tool for vertical movement; and f) raising the tool and the collected sample to the surface.
Claim 2
Independent Claim
124 words
A method for obtaining formation fluid samples from a bore hole which method comprises: a) lowering a tool into said bore hole to a preselected level; b) expanding a pair of packers carried by said tool into sealing contact with said bore hole to isolate an interval of said bore hole,; c) collecting fluid entering said isolated interval and measuring a property thereof; d) determining on the basis of the measured property whether it is desired to retain a sample of said collected fluid and, if the determination is positive, transferring said fluid to a sample collection chamber within said tool; e) contracting said packers to free said tool for vertical movement; and f) raising the tool and the collected sample to the surface.
Claim 3
Dependent Claim
74 words
A method according to Claim 1 wherein the fluid is collected by withdrawing fluid from said isolated interval to a first test chamber, a property of the withdrawn fluid is measured in said test chamber, and when said measured property indicates that formation fluid is being withdrawn into said tool, the withdrawn fluid is directed to a second test chamber where the property on the basis of which said determination is made is measured.
Claim 4
Dependent Claim
53 words
A method according to Claim 2, wherein said first test chamber is a resistivity test chamber, the resistivity of the withdrawn fluid is measured therein and the withdrawn fluid is directed to the second test chamber when the resistivity of the withdrawn fluid indicates that formation fluid is being withdrawn into said tool.
Claim 5
Independent Claim
74 words
A method according to any preceding claim wherein is step (d), the fluid is transferred to one of a plurality of sample collection chambers if said determination is positive and if the determination is negative the fluid is returned to the bore hole,in step (e) said tool is moved to another preselected location, and then steps (b) to (e) are repeated until a desired number of the sample chambers in said tool contain samples.
Claim 6
Independent Claim
22 words
A method according to any preceding claim wherein said packers are expanded by inflating them with fluid pumped from said isolated interval.
Claim 7
Dependent Claim
249 words
A method for obtaining formation fluid samples from a bore hole according to Claim 1 which method comprises: a) lowering a tool suspended by a wireline into said bore hole to a preselected level; b) utilizing a pair of packers carried by said tool to isolate an interval of said bore hole by inflating said packers to expand them into sealing contact with said bore hole; c) withdrawing fluid from said isolated interval and measuring its resistivity in a resistivity test chamber within said tool and sending the resistivity measurement to the surface via said wireline; d) when the resistivity becomes constant, indicating that formation fluid uncontaminated by drilling mud components is being withdrawn into said tool, directing the withdrawn fluid into a second test chamber and measuring therein the redox potential, acidity and temperature of said fluid and sending results thereof to the surface by said wireline; e) determining from the thus transmitted results whether it is desired to retain a sample and, if the determination is positive, pumping said fluid to one of a plurality of sample collection chambers within said tool, if the determination is negative returning said fluid to said bore hole; f) deflating said packers to free said tool for vertical movement and moving said tool to another preselected location; g) repeating steps (b) through (f) until the sample chambers in said tool are filled with desired samples; and h) retracting said wireline to return the tool and the collected samples to the surface.
Claim 8
Dependent Claim
234 words
A method for obtaining formation fluid samples from a bore hole according to Claim 1 which method comprises: a) lowering a tool suspended by a wireline into said bore hole to a preselected level; b) utilizing a pair of packers carried by said tool to isolate an interval of said bore hole by inflating said packers to expand them into sealing contact with said bore hole; c) withdrawing fluid from said isolated interval and measuring its resistivity in a resistivity test chamber within said tool; d) when the resistivity becomes constant; indicating that formation fluid uncontaminated by drilling mud components is being withdrawn into said tool, directing the withdrawn fluid into a second test chamber and measuring therein properties of said fluid and sending results thereof to the surface by said wireline; e) determining from the thus transmitted results whether it is desired to retain a sample and, if the determination is positive, pumping said fluid to one of a plurality of sample collection chambers within said tool and if the determination is negative returning said fluid to said bore hole; f) deflating said packers to free said tool for vertical movement and moving said tool to another preselected location; g) repeating steps (b) through (f) until the sample chambers in said tool are filled with desired samples; and h) retracting said wireline to return the tool and the collected samples to the surface.
Claim 9
Dependent Claim
241 words
A method for obtaining formation fluid samples from a bore hole according to Claim 1-which method comprises: a) lowering a tool suspended by a wireline into said bore hole to a preselected level; b) utilizing a pair of packers carried by said tool to isolate an interval of said bore hole by inflating said packers to expand them into sealing contact with said bore hole; c) withdrawing fluid from said isolated interval and measuring its resistivity in a resistivity test chamber within said tool and sending the resistivity measurement to the surface via said wireline; d) when the resistivity measurement indicates that formation fluid is being withdrawn into said tool, directing the withdrawn fluids into a second test chamber and measuring therein the redox potential, acidity and temperature of said fluids, sending results thereof to the surface by said wireline; e) determining from the thus transmitted results whether it is desired to retain a sample and, if the determination is positive, pumping said fluid to one of a plurality of sample collection chambers within said tool, if the determination is negative returning said fluid to said bore hole; f) deflating said packers to free said tool for vertical movement and moving said tool to another preselected location; g) repeating steps (b) through (f) until the sample chambers in said tool are filled with desired samples; and h) retracting said wireline to return the tool and the collected samples to the surface.
Claim 10
Dependent Claim
205 words
A method for obtaining formation fluid samples from a bore hole according to Claim 1 which method comprises: a) lowering a tool suspended by a wireline into said bore hole to a preselected level; b) utilizing a pair of packers carried by said tool to isolate an interval of said bore hole by inflating said packers to expand them into sealing contact with said bore hole; c) withdrawing fluid from said isolated interval and measuring its resistivity in a resistivity test chamber within said tool and sending the resistivity measurement to the surface via said wireaine; d) when the resistivity becomes constant, indicating that formation fluid uncontaminated by drilling mud components is being withdrawn into said tool, directing the withdrawn fluid into a second test chamber and measuring therein selected physical properties of said fluid and sending results thereof to the surface by said wireline; e) determining from the thus transmitted results whether it is desired to retain a sample and, if the determination is positive, pumping said fluid to a sample collection chamber- associated with said tool; f) deflating said packers to free said tool for vertical movement; and g) retracting said wireline to return the tool and the collected sample to the surface.
Claim 11
Dependent Claim
121 words
Apparatus for sampling and testing bore hole formation fluids, said apparatus comprising a downhole tool having: a) a pair of expandable packers for isolating an interval of the bore hole; b) means for expanding the packers; c) means for withdrawing fluid from the space between the packers; d) a.test chamber for receiving fluid withdrawn from said interval; e) means for measuring a property of fluid located in said test chamber; f) a sample collection chamber arranged to receive fluid from said test chamber; g) signal transmission means for transmitting a data signal representative of said measured property; and h) means operable in response to said data signal for controlling flow of fluid from the test chamber to the sample collection chamber.
Claim 12
Dependent Claim
121 words
Apparatus for sampling and testing bore hole formation fluids, said apparatus comprising a downhole tool having: a) a pair of expandable packers for isolating an interval of the bore hole; b) means for expanding the packers; c) means for withdrawing fluid from the space between the packers; d) a.test chamber for receiving fluid withdrawn from said interval; e) means for measuring a property of fluid located in said test chamber; f) a sample collection chamber arranged to receive fluid from said test chamber; g) signal transmission means for transmitting a data signal representative of said measured property; and h) means operable in response to said data signal for controlling flow of fluid from the test chamber to the sample collection chamber.
Claim 13
Independent Claim
202 words
An apparatus operable on a wireline logging cable for sampling and testing bore hole formation fluids said apparatus comprising a downhole tool adapted to be connected to said wireline, said tool having: a) a pair of inflatable packers for isolating an interval of the bore hole when inflated; b) an electrically driven hydraulic pump for withdrawing fluids from the space between said packers and conduit means interconnecting the outlet of said pump to said packers whereby inflation thereof may be accomplished to isolate said interval of said bore hole; c) a resistivity test chamber through which said withdrawn fluids are conducted; d) a second test chamber in communication with the outlet of said pump and adapted to measure properties of said withdrawn fluids; e) a sample collection chamber adapted to be in communication with the outlet of said pump; f) signal transmission means for transmitting to the surface the results of resistivity and other properties measured in said second test chamber; and g) valve means controlled from the surface through said wireline for controlling the flow of said withdrawn fluids, initially to inflate - said packers and subsequently to direct said fluids to said second test chamber and said sample collection chamber.
Claim 14
Independent Claim
202 words
An apparatus operable on a wireline logging cable for sampling and testing bore hole formation fluids said apparatus comprising a downhole tool adapted to be connected to said wireline, said tool having: a) a pair of inflatable packers for isolating an interval of the bore hole when inflated; b) an electrically driven hydraulic pump for withdrawing fluids from the space between said packers and conduit means interconnecting the outlet of said pump to said packers whereby inflation thereof may be accomplished to isolate said interval of said bore hole; c) a resistivity test chamber through which said withdrawn fluids are conducted; d) a second test chamber in communication with the outlet of said pump and adapted to measure properties of said withdrawn fluids; e) a sample collection chamber adapted to be in communication with the outlet of said pump; f) signal transmission means for transmitting to the surface the results of resistivity and other properties measured in said second test chamber; and g) valve means controlled from the surface through said wireline for controlling the flow of said withdrawn fluids, initially to inflate - said packers and subsequently to direct said fluids to said second test chamber and said sample collection chamber.
Claim 15
Dependent Claim
20 words
Apparatus according to Claim 11 in which the second test chamber is suitable to test acidity, redox potential and temperature.
Claim 16
Dependent Claim
21 words
Apparatus according to any one of Claims 10 to 12 in which a plurality of sample collection chambers are ' provided.
References Cited (Backward Citations)
No citation records indexed.
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