US3107730A - Sample taking apparatus - Google Patents

Sample taking apparatus Download PDF

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US3107730A
US3107730A US83263959A US3107730A US 3107730 A US3107730 A US 3107730A US 83263959 A US83263959 A US 83263959A US 3107730 A US3107730 A US 3107730A
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conduit
bore
sample
valve
piston
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Maurice P Lebourg
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Schlumberger Well Surveying Corp
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Schlumberger Well Surveying Corp
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00Testing 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
    • E21B49/08Obtaining fluid samples or testing fluids, in boreholes or wells
    • E21B49/10Obtaining fluid samples or testing fluids, in boreholes or wells using side-wall fluid samplers or testers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7722Line condition change responsive valves
    • Y10T137/7781With separate connected fluid reactor surface
    • Y10T137/7793With opening bias [e.g., pressure regulator]
    • Y10T137/7796Senses inlet pressure

Definitions

  • a pack-off device with a sealing member which is brought into engagement with a portion of the sidewall of the bore so as to isolate a portion of the formation from the usual Huid in the bore.
  • a sample-admitting port in the sealing member is opened, for example, by perforating means to permit fluids from the formation to ow via the sample-admitting port into .
  • a sample-receiving chamber in the apparatus After a suitable period of time during which the formation fluids are collected, the sample-receiving chamber is closed, Vthe pack-o device and sealing member retracted and the apparatus withdrawn from the bore so .that a sample may be measured and analyzed.
  • a fluid sampling apparatus having a sample-admitting port ⁇ and sample-receiving chamber coupled for fluid communication is provided with a valve in the fluid sample flow line which is held open by the hydrostatic pressure of bore iluid so -that the fluid may ow from between the sample-admitting port and sample chamber uninterrupted as long as the pressure of the borehole fluids exceeds the pressure of the formation iiuid.
  • Meansare provided to close the valve and thereby block the fluid conduit whenever the pressure of the formationuids approaches the hydrostatic pressure of the bore fluid.
  • FIG. 1 is a diagrammatic view in elevation of fluid sampling apparatus embodying the present invention and shown disposed in a borehole;
  • FIG. 2 is a diagrammatic illustration of operating portions of the iluid sampling apparatus which are arranged for lowering into a Well;
  • FIG. 3 is a cross-sectional view of a safety valve embodying the present invention.
  • FIG. 4 is a cross-sectional View of another embodiment of the present invention.
  • FIG. 1 of the drawings a Iformation sampling apparatus 10 is shown disposed in a smooth-walled bore 11 such as those found in hard rock formations, the bore 11 traversing earth formations 12. Bore 11 contains aizid 13 to provide a 'hydrostatic control pressure for the well in a conventional manner.
  • apparatus 10 is the same as that described in the copending application Serial No. 833,356, filed Aug. 12, 1959, by Frank R. Whitten and reference may be made thereto for the detailed description. It will be appreciated, however, that the present invention may be employed in other uid sampling apparatuses, for example, las disclosed, in co- Ypending application Serial No. 817,769, filed June 3, 1959, by F. Whitten or the aforesaid Chambers patent.
  • Apparatus V10 is suspended in the bore 11 by a cable 14 connected to a winch (not shown) located at the surface fof the earth, the winch and cable serving to lower and raise the apparatus in a customary manner.
  • Apparatus 10 is provided with spaced sample-admitting means 15, 16 which are adapted to engage and seal with the portions of the borehead wall.
  • sample-admitting means 15, 16 Diametrically opposed from the sample-admitting means 15, 16 is a wall-engaging member 17 mounted so as to move between a retracted posit-ion and an extended position, the Lretracted position permitting movement of the apparatus through the bore wth-ile the extended position places the sampleadrnitting means in sealing engagement with the bore wall.
  • an expanding and reracting mechanism 18 is provided to manipulate the movement of the wall-engaging member 17 between the extended and retracted positions by means of a piston 19 secured to the member 17 and a hydraulic cylinder 2d.
  • the sampleadmitting means include seal. pads 21, 22 which have normally-closed central ports 23, 24 (shown in ⁇ an open condition).
  • Perforating means (not shown) in the apparatus Vare adapted upon detonation to prod-ucc perforating jets extending along perforating axes 25, 26 when the sealing pads are inV sealing engagement with portions of the borehole wall to open the ports 23, 24 as shown in the drawing.
  • thev formation fluids may flow throughthe ports Z3, 24,"sample flow conduit 28, safety valve'29, and seal valve 3i) to a' sample chamber 31 which collects the iiuid from the formati-on.
  • a pressureV recording device 32 may be connected to the sample flow conduit 28 to record the pressures of the uids in the conduit..
  • the seal valve 3) is adapted, upon actuation, to close off the sample chamber and thereby entrap a collected fluid sample.
  • safety valve 29 is disposed ybetween an upper conduit section 28a which Vis coupled to the sample-admitting means 15, 16 (FIG. 2) and a lower conduit section 28h which is coupled to the sample-receiving chamber 31 (FIG. 2).
  • Apparatus 10 is generally lcylindrical and valve 29 Vis generally arranged transversely to the longitudinal axisV of the apparatus.
  • /alve 29V includes rst ⁇ and second bores 35, 36 of equal diameter separated by section having a 'bore 37 of smaller diameter, the respective junctions ott the bores forming seats 38, 39 -which are beveled inwardly towards the bore 37.
  • Adjoining .bore 36 is an enlarged bore 40 which threadedly receives a cap member 4i.
  • Cap member 4l has a tubular extension 42 which has an outside diameter less than the diameter of bore iti and an inside diameter similar to the diameter of vbores 35, 36.
  • Conduit 28a opens into bore 40 while conduit 2317 opens into bore 37, the terminal end of cap extension 42 being spaced from the junction of bores 36 and 4@ to permit iluidl flow between conduit sections 28a, 28h.
  • a spool-type piston arrangement 44 which includes pistons 44a, 44]: rigidly spaced from one another by a member 44C of smaller diameter than bore 37, the piston 44a being slidably and sealingly received ⁇ by bore 35 Awhile piston 44! is arranged to be slidably and sealingly received by lbore 36. ln the position of the piston arrangement 44 shown, piston 4417 is slidably received Within the cap extension 42 while piston 44a abuts seat 3% whenever the pressure of the bore iluid exceeds the pressure of the fluid in the conduit 28 by a certain amount.
  • cap ⁇ member 4l and piston 44b have aligned and similar cylindrical recesses 47, 43 which receive a spring 49.
  • Spring 49 is normally under compression when the piston arrangement 44 is in position show-n to permit fluid ilow through conduit 2S.
  • Extension 42 is also provided with iluid access ports 150 suitably located to prevent a iluid lock of piston 44b in extension 42.
  • An O ring in piston 44b is arranged to seal with the bore 36 insuring the interruption of lluid communication between conduit sections 28a, 28h;
  • Piston 4417 'and 'bore 36 of the housing constitute cooperating valve elements such as a valve seat and valve me-mber which are relatively movable between a position permitting fluid flow through conduit sections 28a, -ZSb and a position blocking fluid ilow between sections 28a, ZSb.
  • the piston 44a in bore 35 i-n the housing - is subject to a pressure idiierential between the pressure in the well bore ⁇ and the pressure in the conduit sections 28a, 23h Piston 44a is coupled to piston 4412 thereby providing relative movement between the valve elements in response to a pressure differential across piston 44a.
  • vPistons 6l, 62 and 63 are arranged to be sealbe preserved by virtue of the fact that valve 291will automatically close whenever the bore fluid gains access ⁇ to the flow conduit.
  • valve 50 is disposed in an apparatus lil between an Vupper conduit 28a lfrom a sample-admitting port and a lower conduit 28h to a sample-receiving chamber.
  • Valve 50 includes first and second bores 51, v52 of equal diameter separated by a section having a bore 53 of smaller diameter, the respective junctions of the bores forming seats 54, 54'.
  • Adjoining bore 52 is an enlarged bore 55 -which is threaded at one end to receive a cap member 56.
  • Adjoining bore 51 is an enlarged threaded bore which threadedly receives a tubular sleeve 58 having a central bore S9 of smaller diameter than lbore 5l.
  • Conduit 28a opens into bore 53 while conduit ZSb opens into enlarged bore VS5.
  • a spool-type piston arrangement 60 includes pistons ingly received by bores 59, Si and 52 respectively.
  • piston d3 is disposed within enlarged -bore 55 thereby permitting iluid flow ⁇ between conduits 28a, 2812 while piston 62 in bore 5l abuts seat 54 and piston 6l is Kin bore S9.
  • pistonrl has a smaller area than piston e2 or 63, the pistons 62, 63 having equal areas.
  • the area of piston 6l multiplied by the hydrostatic pressure of the bore fluid will have a greater value than the area of piston 62 multiplied by the formation iluid pressure so that the valve will stay open while a sample is being taken.
  • a iluid sample taking apparatus for use in a fluidfilled well bore including sample-receiving means for collecting a sample of fluids from earth formations, sample ⁇ admitting means for isolating a section of earth formations from the fluids in the well bore to pass formation iluids to said sample-receiving means, and flow conduit means providing a fluid communication path between said sample-receiving means and said sample-admitting means, the improvement in said apparatus comprising a valve having a valve seat and a valve member disposed in saidconduit means and cooperative upon relative movement to move between positions to open and close said conduit means, said apparatus further having a bore extending between said conduit means and the exterior l of said apparatus, a piston in said bore exposed on one side -to the fluids in said llow conduit means and exposed on an opposite side to fluids exterior of said apparatus, said valve member being coupled to said piston and resilient means normally urging said valve member towards a position for closing said conduit means.
  • a iluid sample taking apparatus for use in a fluidlled well bore including sample-receiving means for collecting a sample of iluids from earth formations, sample-admitting means for isolating a section of earth formations from the fluids in the well bore to pass formation iluids to said sample-receiving means, and ilow conduit means providing a lluid communication path between said sample-receiving means and said sample-admitting means, the improvement in said apparatus comprising a valve having Ia valve seat and a valve member disposed in to the fluids in said ilow conduit means and exposed on' an opposite side to lluids exterior of said apparatus,Y a
  • a fluid sample taking apparatus for use in Aa fluidlled well bore including sample-receiving means for collecting a sample of fluids from earth formations, sample-adrnitting means for isolating a section of earth formations from the fluids in the Iwell bore to pass formation fluids to said sample-receiving means, and flow conduit means providing a fluid communication path between said sample-receiving means and said sample-admitting means, the improvement in said apparatus comprising a valve having a valve seat and a valve member disposed in said conduit means and cooperative upon relative movement to move between positions to open and close said conduit means, said apparatus further having a bore extending between said conduit means and the exterior of said apparatus, said bore having sections of different diameters, a piston in said bore having sections of different diameters to correspond to said bore and being exposed on one side to the fluids in said flow conduit means and exposed on an opposite side to -uids exterior of said apparatus, said piston being coupled to said valve member and functioning together to operate said valve.
  • a fluid sample taking apparatus for use in a fluidfilled well bore including sample-receiving means for collecting a sample of fluids from earth formations, sampleadmitting means for isolating a section of earth formations from the fluids in the well bore to pass Iformation fluids to said sample-receiving means, and conduit means providing a fluid communication path between said sample-receiving means and said sample-admitting means, the improvement in said apparatus comprising a valve having a valve seat and a valve member disposed in said conduit means and cooperative -upon relative movement to move between positions to open or close said conduit means, said apparatus further having a bore extending between said conduit means and the exterior of said apparatus, said bore having sections of different diameters wherein the larger diameter section is intermediate of the smaller diameter section and said conduit means, a piston in said bore having sections of ⁇ different diameters to correspond to said bore, said piston being coupled to said valve member and functioning together to Operate said valve.
  • valve means for opening or closing said conduit dependent upon the pressure dilferential between fluids within the conduit and fluids in the well bore, said valve means including a valve seat and a valve member disposed in said conduit and cooperative upon relative movement therebetween to either open or close said conduit, said apparatus further having a bore extending between said conduit and the exterior of said apparatus, a piston in said bore, said piston being coupled to said valve member and functioning together to operate said valve, said piston and valve members having an effective area in fluid communication with the pressure of fluids in said conduit which is greater than the effective area in fluid communication with the yfluid in the well bore.
  • a cable supported well tool apparatus for use in a ffuid-illed well bore wherein such apparatus has an internally contained conduit for fluid flow only in said apparatus and wherein the pressure of fluids in said conduit are different from the pressure of the fluids in the therebetween -to eitheropen or close said conduit, said apparatus further having a bore extending between said conduit and the exterior of said apparatus, a piston in said bore, said piston being coupled to said valve member and functioning together to operate said valve, and a spring operative upon said valve member to urge said valve member towands a vposition to close said conduit said piston and valve member having a first effective area in fluid communication with the pressure of fluids in said conduit providing a force acting in one direction and having a second effective area in fluid communication with the pressure of the fluids in the well bore providing a force acting in 'an opposite direction, said valve closing whenever the combined force acting in-one direction and force of said spring exceed the force acting in the opposite direction.
  • Fluid sample-taking apparatus for use in a well bore containing a fluid comprising: a support adapted for passage through a borehole and having sample-admitting means adapted for sealing engagement with the wall of a borehole, sample-receiving means for receiving a fluid sample, a flow line conduit providing a fluid communication path between said sample-admitting means and said sample-receiving means, and a valve having relatively movable valve elements operable to permit or block fluid flow through said flow -line conduit and including differential pressure-responsive means, and means providing a pressure communication path between said differential pressure-responsive means and the exterior of said support and :between said differential pressure-responsive means and said flow line conduit whereby a pressure differential across said differential pressure-responsive means controls the operative condition of said valve.
  • Fluid sample-taking apparatus for use in a well bore containing a fluid comprising: a support adapted for passage through a borehole and having Isample-admitting means adapted for sealing engagement with the wall. of a borehole, sample-receiving means for receiving a fluid sample, and a flow line conduit providing a fluid communication path between said sample-admittin-g means and said sample-receiving means; a valve including relatively movable valve elements carried b-y said support arranged to close or open said flow line conduit and control fluid flow therethrough, and slidable piston means in a cylinder in said support, said cylinder extending on one side of said piston means to the exterior of said support and extending on the other side of said piston means to said flow line conduit, the effective pressure area to the one side of said piston means being greater than the effective area to the other side of said piston means so that a pressure differential between the fluids in the well bore and the fluids in said flow line conduit acting on said piston means and valve elements effects an operation of said valve.
  • Fluid sample-taking apparatus for use in a well bore containing a fluid comprising: a support adapted for passage through a borehole and having sample-admitting means adapted for sealin-g engagement with the wall of a borehole, sample-receiving means for receiving a fluid sample, and a flow line conduit providing a fluid comrnnnication path between said sample-admitting means and -said sample-receiving means; a valve ⁇ including relatively movable valve elements carried by said support arranged to close or open said flow line conduit and control fluid flow therethrough, and slidable piston means in a cylinder in said support, said cylinder extending on one side of said piston means to the exterior of said support and extending on the other side of said pis-ton means to said flow line conduit whereby effective pressure areas are provided on opposite sides of said piston means, and spring means acting on said piston means and one valve element for normally urging said one valve element toward a position closing said flow line conduit so that when the force of said spring combined wit-h the force
  • a cable-supported Well tool apparatus for use in a fluid-filled Well bore wherein such apparatus has an internally-contained conduit for Huid iiow only in said apparatus and wherein the pressure of uids in said com duit are different from the pressure of the fluid in the Well bore exterior of said apparatus, the improvement in said apparatus comprising a valve for said conduitrhaving Valve elements arranged 4for relative movement to ⁇ open or close said conduit relative to uid flow therethrough and including differential pressure-responsive means, said differential pressure-responsive means including a piston 8 slidably received in a cyiinder, said cylinder extending on one side of said piston to the exterior of the apparatus and extending on an opposite side of said piston to said conduit whereby a pressure differential across said differential pressure-responsive means controls the operative condition of said valve.

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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)

Description

Oct. 22, 1963 Filed Aug. l0, 1959 M. P. LEBOURG 3,107,730 SAMPLE TAKING APPARATUS 2 Sheets-Sheel l JAFE'Y VAL VE .SEAL VAL VE :AMPM CHAMBER Maar/ce /D. scu/y INVENTOR.
RM1/mw@ Oct. 22, 1963 M. P'. LEBOURG 3,107,730
SAMPLE TAKING APPARATUS Filed Aug. lO, 1959 2 Sheets-Sheet 2 Fla/ FLOW 7'0 JAM/CZE /PECE/l//NG CHAMBER k l; 2.9@ l
IN VEN TOR.
MM5/a Arron/VE y 3,167,739 SAMELE TAKiNG APPARATUS Maurice P. Lebourg, Houston, Tex., assigner to Schiumberger Weil Surveying Corporation, Houston, Tex., a corporation of Texas Filed Ang. 1), 1959, Ser. No. 332,639
1!) Saints. (Si. 16e-109) he present invention relates to iluid sampling apparatus and, more particularly, to new and improved uid sampling apparatus which reduces the possibility of contamination by bore fluid of a formation fluid sample obtained by the liuid sampling apparatus.
Generally, commercial formation uid sample taking apparatus in present use employs a pack-off device with a sealing member which is brought into engagement with a portion of the sidewall of the bore so as to isolate a portion of the formation from the usual Huid in the bore. Thereafter, a sample-admitting port in the sealing member is opened, for example, by perforating means to permit fluids from the formation to ow via the sample-admitting port into .a sample-receiving chamber in the apparatus. After a suitable period of time during which the formation fluids are collected, the sample-receiving chamber is closed, Vthe pack-o device and sealing member retracted and the apparatus withdrawn from the bore so .that a sample may be measured and analyzed. For further details of formation fluid samplers `as above-described, reference may be made -to Patent No. 2,674,313 by Lawrence S. Chambers, or to copending application Serial No. 817,769 by Frank R. Whitten, filed lune 3, 1959, or copending application Serial No. 833,356 by Frank R. Whitten, filed Aug. 12, 1959.
In apparatus, as above described, occasionally it has been found that the seal of the sealing member with respect to the formation may fail or the 4apparatus other-` paratus to prevent or eliminate substantial contamination or escapement of a collected formation uid sample by bore fluid which is both simple and economical to manufacture and reliable in operation; Y
In accordance with the present invention, a fluid sampling apparatus having a sample-admitting port `and sample-receiving chamber coupled for fluid communication is provided with a valve in the fluid sample flow line which is held open by the hydrostatic pressure of bore iluid so -that the fluid may ow from between the sample-admitting port and sample chamber uninterrupted as long as the pressure of the borehole fluids exceeds the pressure of the formation iiuid. Meansare provided to close the valve and thereby block the fluid conduit whenever the pressure of the formationuids approaches the hydrostatic pressure of the bore fluid. Hence, a collected formation fluid sample will be preserved should the bore uid gain access tothe iiuid sample ow line.
The novel features of the present invention are set forth in the appended claims. both .as to its organization and manner of operation tgether with further objects ad advantages thereof may best be understood by way of illustration and example taken in conjunction with the accompanying drawings in which:
The present invention,
3=,l@7,73 Ifatented Oct. 22, 1963 FIG. 1 is a diagrammatic view in elevation of fluid sampling apparatus embodying the present invention and shown disposed in a borehole;
FIG. 2 is a diagrammatic illustration of operating portions of the iluid sampling apparatus which are arranged for lowering into a Well;
FIG. 3 is a cross-sectional view of a safety valve embodying the present invention; and
FIG. 4 is a cross-sectional View of another embodiment of the present invention.
In FIG. 1 of the drawings, a Iformation sampling apparatus 10 is shown disposed in a smooth-walled bore 11 such as those found in hard rock formations, the bore 11 traversing earth formations 12. Bore 11 contains a luid 13 to provide a 'hydrostatic control pressure for the well in a conventional manner.
For convenience of explanation and illustration, apparatus 10 is the same as that described in the copending application Serial No. 833,356, filed Aug. 12, 1959, by Frank R. Whitten and reference may be made thereto for the detailed description. It will be appreciated, however, that the present invention may be employed in other uid sampling apparatuses, for example, las disclosed, in co- Ypending application Serial No. 817,769, filed June 3, 1959, by F. Whitten or the aforesaid Chambers patent.
Apparatus V10 is suspended in the bore 11 by a cable 14 connected to a winch (not shown) located at the surface fof the earth, the winch and cable serving to lower and raise the apparatus in a customary manner.
Apparatus 10 is provided with spaced sample-admitting means 15, 16 which are adapted to engage and seal with the portions of the borehead wall. Diametrically opposed from the sample-admitting means 15, 16 is a wall-engaging member 17 mounted so as to move between a retracted posit-ion and an extended position, the Lretracted position permitting movement of the apparatus through the bore wth-ile the extended position places the sampleadrnitting means in sealing engagement with the bore wall.
AsV shown in FIG. 2, an expanding and reracting mechanism 18 is provided to manipulate the movement of the wall-engaging member 17 between the extended and retracted positions by means of a piston 19 secured to the member 17 and a hydraulic cylinder 2d. The sampleadmitting means include seal. pads 21, 22 which have normally-closed central ports 23, 24 (shown in `an open condition). Perforating means (not shown) in the apparatus Vare adapted upon detonation to prod-ucc perforating jets extending along perforating axes 25, 26 when the sealing pads are inV sealing engagement with portions of the borehole wall to open the ports 23, 24 as shown in the drawing. After perforation of the formations by the jets, ,thev formation fluids may flow throughthe ports Z3, 24,"sample flow conduit 28, safety valve'29, and seal valve 3i) to a' sample chamber 31 which collects the iiuid from the formati-on. A pressureV recording device 32 may be connected to the sample flow conduit 28 to record the pressures of the uids in the conduit.. The seal valve 3) is adapted, upon actuation, to close off the sample chamber and thereby entrap a collected fluid sample.
With the above general explanation of sample taking apparatus, reference may no w be made to FIG. 3 for an understanding of the safety valve 29 in' relation to the sample taking apparatus. In FIGS, safety valve 29 is disposed ybetween an upper conduit section 28a which Vis coupled to the sample-admitting means 15, 16 (FIG. 2) and a lower conduit section 28h which is coupled to the sample-receiving chamber 31 (FIG. 2).
Apparatus 10 is generally lcylindrical and valve 29 Vis generally arranged transversely to the longitudinal axisV of the apparatus. /alve 29V includes rst `and second bores 35, 36 of equal diameter separated by section having a 'bore 37 of smaller diameter, the respective junctions ott the bores forming seats 38, 39 -which are beveled inwardly towards the bore 37. Adjoining .bore 36 is an enlarged bore 40 which threadedly receives a cap member 4i. Cap member 4l has a tubular extension 42 which has an outside diameter less than the diameter of bore iti and an inside diameter similar to the diameter of vbores 35, 36. Conduit 28a opens into bore 40 while conduit 2317 opens into bore 37, the terminal end of cap extension 42 being spaced from the junction of bores 36 and 4@ to permit iluidl flow between conduit sections 28a, 28h.
In the valve 29 is a spool-type piston arrangement 44 which includes pistons 44a, 44]: rigidly spaced from one another by a member 44C of smaller diameter than bore 37, the piston 44a being slidably and sealingly received `by bore 35 Awhile piston 44!) is arranged to be slidably and sealingly received by lbore 36. ln the position of the piston arrangement 44 shown, piston 4417 is slidably received Within the cap extension 42 while piston 44a abuts seat 3% whenever the pressure of the bore iluid exceeds the pressure of the fluid in the conduit 28 by a certain amount.
The adjacent end surfaces of cap` member 4l and piston 44b have aligned and similar cylindrical recesses 47, 43 which receive a spring 49. Spring 49 is normally under compression when the piston arrangement 44 is in position show-n to permit fluid ilow through conduit 2S. Extension 42 is also provided with iluid access ports 150 suitably located to prevent a iluid lock of piston 44b in extension 42.
From the foregoing described apparatus, it will be apparent that the hydrostatic pressure of the bore iluid acts on one side of the piston 44a while the pressure of the formation fluid plus the spring force act on the other side of piston 44a to oppose the hydrostatic pressure. Thus, Whenever the pressure of the iluids in conduit 2S approaches the hydrostatic pressure of the bore fluid, for example, if a seal should fail or a substantial leak in the apparatus occur, the fluid pressure in conduit 2S plus the spring force will exceed the hydrostatic bore iluid pressure on 44a so that the piston 44a is moved to the left moving piston 4411 into bore 36 to abut seat 391 and block the conduit Zlib. An O ring in piston 44b is arranged to seal with the bore 36 insuring the interruption of lluid communication between conduit sections 28a, 28h; Piston 4417 'and 'bore 36 of the housing constitute cooperating valve elements such as a valve seat and valve me-mber which are relatively movable between a position permitting fluid flow through conduit sections 28a, -ZSb and a position blocking fluid ilow between sections 28a, ZSb. The piston 44a in bore 35 i-n the housing -is subject to a pressure idiierential between the pressure in the well bore `and the pressure in the conduit sections 28a, 23h Piston 44a is coupled to piston 4412 thereby providing relative movement between the valve elements in response to a pressure differential across piston 44a. Hence, iluid sample collected prior to the seal failure or leakage will v pistons. vPistons 6l, 62 and 63 are arranged to be sealbe preserved by virtue of the fact that valve 291will automatically close whenever the bore fluid gains access` to the flow conduit.
Referring now to FIG. 4, in another embodiment of the present invention, a valve 50 is disposed in an apparatus lil between an Vupper conduit 28a lfrom a sample-admitting port and a lower conduit 28h to a sample-receiving chamber. Valve 50 includes first and second bores 51, v52 of equal diameter separated by a section having a bore 53 of smaller diameter, the respective junctions of the bores forming seats 54, 54'. Adjoining bore 52 is an enlarged bore 55 -which is threaded at one end to receive a cap member 56. Adjoining bore 51 is an enlarged threaded bore which threadedly receives a tubular sleeve 58 having a central bore S9 of smaller diameter than lbore 5l. Conduit 28a opens into bore 53 while conduit ZSb opens into enlarged bore VS5.
A spool-type piston arrangement 60 includes pistons ingly received by bores 59, Si and 52 respectively. In
the position shown of the piston arrangement oil, piston d3 is disposed within enlarged -bore 55 thereby permitting iluid flow `between conduits 28a, 2812 while piston 62 in bore 5l abuts seat 54 and piston 6l is Kin bore S9. By construction, pistonrl has a smaller area than piston e2 or 63, the pistons 62, 63 having equal areas. The area of piston 6l multiplied by the hydrostatic pressure of the bore fluid will have a greater value than the area of piston 62 multiplied by the formation iluid pressure so that the valve will stay open while a sample is being taken. However, if the bore fluid enters the ilow line, the area of piston 62 being larger than the area of piston di will cause the pistons to shift to the left so that piston 63 enters bore 52 to abut shoulder 54 thereby blocking the cond-uit 28h fand preserving the collected lluid sample.
In addition to the foregoing evident advantages, it will also be appreciated that should the seal valve 30 fail to close at the end of a test, the separation of the seal pads 23, 24 from the bore wall will admit -bore fluid and thus the safety valve will close to preserve the collected sample from contamination and the sample cannot escape through conduit 23a.
While particular embodiments of the present invention have been shown and described, it is apparent that changes and modifications may be made without departing from this invention in its broader aspects, and therefore the aim in the appended claims is to cover all such changes and modiilcations as fall within the true spirit and scope of this invention.
What is claimed is:
fl. A iluid sample taking apparatus for use in a fluidfilled well bore including sample-receiving means for collecting a sample of fluids from earth formations, sample`` admitting means for isolating a section of earth formations from the fluids in the well bore to pass formation iluids to said sample-receiving means, and flow conduit means providing a fluid communication path between said sample-receiving means and said sample-admitting means, the improvement in said apparatus comprising a valve having a valve seat and a valve member disposed in saidconduit means and cooperative upon relative movement to move between positions to open and close said conduit means, said apparatus further having a bore extending between said conduit means and the exterior l of said apparatus, a piston in said bore exposed on one side -to the fluids in said llow conduit means and exposed on an opposite side to fluids exterior of said apparatus, said valve member being coupled to said piston and resilient means normally urging said valve member towards a position for closing said conduit means. v
' 2. A iluid sample taking apparatus for use in a fluidlled well bore including sample-receiving means for collecting a sample of iluids from earth formations, sample-admitting means for isolating a section of earth formations from the fluids in the well bore to pass formation iluids to said sample-receiving means, and ilow conduit means providing a lluid communication path between said sample-receiving means and said sample-admitting means, the improvement in said apparatus comprising a valve having Ia valve seat and a valve member disposed in to the fluids in said ilow conduit means and exposed on' an opposite side to lluids exterior of said apparatus,Y a
lshoulder in said bore limiting movement of saidpiston Y in one direction when said conduit means is open, said piston being coupled to said valve member, and spring means operating on said valve member tending to close said conduit means.
3. A fluid sample taking apparatus for use in Aa fluidlled well bore including sample-receiving means for collecting a sample of fluids from earth formations, sample-adrnitting means for isolating a section of earth formations from the fluids in the Iwell bore to pass formation fluids to said sample-receiving means, and flow conduit means providing a fluid communication path between said sample-receiving means and said sample-admitting means, the improvement in said apparatus comprising a valve having a valve seat and a valve member disposed in said conduit means and cooperative upon relative movement to move between positions to open and close said conduit means, said apparatus further having a bore extending between said conduit means and the exterior of said apparatus, said bore having sections of different diameters, a piston in said bore having sections of different diameters to correspond to said bore and being exposed on one side to the fluids in said flow conduit means and exposed on an opposite side to -uids exterior of said apparatus, said piston being coupled to said valve member and functioning together to operate said valve.
4. A fluid sample taking apparatus for use in a fluidfilled well bore including sample-receiving means for collecting a sample of fluids from earth formations, sampleadmitting means for isolating a section of earth formations from the fluids in the well bore to pass Iformation fluids to said sample-receiving means, and conduit means providing a fluid communication path between said sample-receiving means and said sample-admitting means, the improvement in said apparatus comprising a valve having a valve seat and a valve member disposed in said conduit means and cooperative -upon relative movement to move between positions to open or close said conduit means, said apparatus further having a bore extending between said conduit means and the exterior of said apparatus, said bore having sections of different diameters wherein the larger diameter section is intermediate of the smaller diameter section and said conduit means, a piston in said bore having sections of `different diameters to correspond to said bore, said piston being coupled to said valve member and functioning together to Operate said valve.
5. In a cable supported well tool apparatus for use in a fluid-filled well bore wherein such apparatus has an internally contained conduit for fluid flow only in said apparatus and wherein the pressure of fluids in said conduit are different from the pressure of the fluids in the well bore, the improvement in said apparatus comprising valve means for opening or closing said conduit dependent upon the pressure dilferential between fluids within the conduit and fluids in the well bore, said valve means including a valve seat and a valve member disposed in said conduit and cooperative upon relative movement therebetween to either open or close said conduit, said apparatus further having a bore extending between said conduit and the exterior of said apparatus, a piston in said bore, said piston being coupled to said valve member and functioning together to operate said valve, said piston and valve members having an effective area in fluid communication with the pressure of fluids in said conduit which is greater than the effective area in fluid communication with the yfluid in the well bore.
`6. In a cable supported well tool apparatus for use in a ffuid-illed well bore wherein such apparatus has an internally contained conduit for fluid flow only in said apparatus and wherein the pressure of fluids in said conduit are different from the pressure of the fluids in the therebetween -to eitheropen or close said conduit, said apparatus further having a bore extending between said conduit and the exterior of said apparatus, a piston in said bore, said piston being coupled to said valve member and functioning together to operate said valve, and a spring operative upon said valve member to urge said valve member towands a vposition to close said conduit said piston and valve member having a first effective area in fluid communication with the pressure of fluids in said conduit providing a force acting in one direction and having a second effective area in fluid communication with the pressure of the fluids in the well bore providing a force acting in 'an opposite direction, said valve closing whenever the combined force acting in-one direction and force of said spring exceed the force acting in the opposite direction.
7. Fluid sample-taking apparatus for use in a well bore containing a fluid comprising: a support adapted for passage through a borehole and having sample-admitting means adapted for sealing engagement with the wall of a borehole, sample-receiving means for receiving a fluid sample, a flow line conduit providing a fluid communication path between said sample-admitting means and said sample-receiving means, and a valve having relatively movable valve elements operable to permit or block fluid flow through said flow -line conduit and including differential pressure-responsive means, and means providing a pressure communication path between said differential pressure-responsive means and the exterior of said support and :between said differential pressure-responsive means and said flow line conduit whereby a pressure differential across said differential pressure-responsive means controls the operative condition of said valve.
8. Fluid sample-taking apparatus for use in a well bore containing a fluid comprising: a support adapted for passage through a borehole and having Isample-admitting means adapted for sealing engagement with the wall. of a borehole, sample-receiving means for receiving a fluid sample, and a flow line conduit providing a fluid communication path between said sample-admittin-g means and said sample-receiving means; a valve including relatively movable valve elements carried b-y said support arranged to close or open said flow line conduit and control fluid flow therethrough, and slidable piston means in a cylinder in said support, said cylinder extending on one side of said piston means to the exterior of said support and extending on the other side of said piston means to said flow line conduit, the effective pressure area to the one side of said piston means being greater than the effective area to the other side of said piston means so that a pressure differential between the fluids in the well bore and the fluids in said flow line conduit acting on said piston means and valve elements effects an operation of said valve.
9. Fluid sample-taking apparatus for use in a well bore containing a fluid comprising: a support adapted for passage through a borehole and having sample-admitting means adapted for sealin-g engagement with the wall of a borehole, sample-receiving means for receiving a fluid sample, and a flow line conduit providing a fluid comrnnnication path between said sample-admitting means and -said sample-receiving means; a valve `including relatively movable valve elements carried by said support arranged to close or open said flow line conduit and control fluid flow therethrough, and slidable piston means in a cylinder in said support, said cylinder extending on one side of said piston means to the exterior of said support and extending on the other side of said pis-ton means to said flow line conduit whereby effective pressure areas are provided on opposite sides of said piston means, and spring means acting on said piston means and one valve element for normally urging said one valve element toward a position closing said flow line conduit so that when the force of said spring combined wit-h the force provided by the fluids in the flow line acting on one of said pressure yareas exceeds the force provided by the uids in the Well bore acting on the remaining pressure area, the valve will close.
10. 1n a cable-supported Well tool apparatus for use in a fluid-filled Well bore wherein such apparatus has an internally-contained conduit for Huid iiow only in said apparatus and wherein the pressure of uids in said com duit are different from the pressure of the fluid in the Well bore exterior of said apparatus, the improvement in said apparatus comprising a valve for said conduitrhaving Valve elements arranged 4for relative movement to` open or close said conduit relative to uid flow therethrough and including differential pressure-responsive means, said differential pressure-responsive means including a piston 8 slidably received in a cyiinder, said cylinder extending on one side of said piston to the exterior of the apparatus and extending on an opposite side of said piston to said conduit whereby a pressure differential across said differential pressure-responsive means controls the operative condition of said valve.
Y References Cited in the iile of this patent UNTTED STATES PATENTS 2,612,346 Nelson Sept. 30, 1952 2,718,265 Conrad Sept. 20', 1955 2,846,015 Pittman Aug. 5,'1958 2,847,074 Maly et al Aug. 12, 1958

Claims (1)

  1. 5. IN A CABLE SUPPORTED WELL TOOL APPARATUS FOR USE IN A FLUID-FILLED WELL BORE WHEREIN SUCH APPARATUS HAS AN INTERNALLY CONTAINED CONDUIT FOR FLUID FLOW ONLY IN SAID APPARATUS AND WHEREIN THE PRESSURE OF FLUIDS IN SAID CONDUIT ARE DIFFERENT FROM THE PRESSURE OF THE FLUIDS IN THE WELL BORE, THE IMPROVEMENT IN SAID APPARATUS COMPRISING VALVE MEANS FOR OPENING OR CLOSING SAID CONDUIT DEPENDEND UPON THE PRESSURE DIFFERENTIAL BETWEEN FLUIDS WITHIN THE CONDUIT AND FLUIDS IN THE WELL BORE, SAID VALVE MEANS INCLUDING A VALVE SEAT AND A VALVE MEMBER DISPOSED IN SAID CONDUIT AND COOPERATIVE UPON RELATIVE MOVEMENT THEREBETWEEN TO EITHER OPEN OR CLOSE SAID CONDUIT, SAID APPARATUS FURTHER HAVING A BORE EXTENDING BETWEEN SAID
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3452592A (en) * 1966-12-01 1969-07-01 Schlumberger Technology Corp Methods and apparatus for determining effectiveness of sidewall engagement with well bore walls
US3628569A (en) * 1969-12-12 1971-12-21 Schlumberger Technology Corp Control valves for well tools
US3656508A (en) * 1970-06-15 1972-04-18 Ingersoll Rand Canada Water valve for rock drills
US4091832A (en) * 1976-03-29 1978-05-30 U.S. Industries, Inc. Valve
US6162095A (en) * 1998-11-11 2000-12-19 Smiths Industries Public Limited Company Electrical connection
US20020100585A1 (en) * 2001-01-29 2002-08-01 Spiers Christopher W. Slimhole fluid tester
US20090255671A1 (en) * 2008-04-09 2009-10-15 Baker Hughes Incorporated Methods and apparatus for collecting a downhole sample
US20090255729A1 (en) * 2008-04-09 2009-10-15 Baker Hughes Incorporated Methods and apparatus for collecting a downhole sample
DE102009026032A1 (en) * 2009-06-25 2011-01-05 Dammann Gmbh Herbert Method for cleaning interior space of empty reservoir and/or for stirring reservoir fluid in reservoir in e.g. field sprayer, involves rotating tube around rotation axis between supports, where tube is rotatably supported between supports

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2612346A (en) * 1951-06-27 1952-09-30 Standard Oil Dev Co Device for obtaining samples from well bores
US2718265A (en) * 1950-11-25 1955-09-20 Baker Oil Tools Inc Apparatus for automatically filling well casing
US2846015A (en) * 1957-05-10 1958-08-05 Halliburton Oil Well Cementing Self fill differential collar
US2847074A (en) * 1955-11-14 1958-08-12 Halliburton Oil Well Cementing Well casing fill-up device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2718265A (en) * 1950-11-25 1955-09-20 Baker Oil Tools Inc Apparatus for automatically filling well casing
US2612346A (en) * 1951-06-27 1952-09-30 Standard Oil Dev Co Device for obtaining samples from well bores
US2847074A (en) * 1955-11-14 1958-08-12 Halliburton Oil Well Cementing Well casing fill-up device
US2846015A (en) * 1957-05-10 1958-08-05 Halliburton Oil Well Cementing Self fill differential collar

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3452592A (en) * 1966-12-01 1969-07-01 Schlumberger Technology Corp Methods and apparatus for determining effectiveness of sidewall engagement with well bore walls
US3628569A (en) * 1969-12-12 1971-12-21 Schlumberger Technology Corp Control valves for well tools
US3656508A (en) * 1970-06-15 1972-04-18 Ingersoll Rand Canada Water valve for rock drills
US4091832A (en) * 1976-03-29 1978-05-30 U.S. Industries, Inc. Valve
US6162095A (en) * 1998-11-11 2000-12-19 Smiths Industries Public Limited Company Electrical connection
US20020100585A1 (en) * 2001-01-29 2002-08-01 Spiers Christopher W. Slimhole fluid tester
US6722432B2 (en) * 2001-01-29 2004-04-20 Schlumberger Technology Corporation Slimhole fluid tester
US20090255671A1 (en) * 2008-04-09 2009-10-15 Baker Hughes Incorporated Methods and apparatus for collecting a downhole sample
US20090255729A1 (en) * 2008-04-09 2009-10-15 Baker Hughes Incorporated Methods and apparatus for collecting a downhole sample
US7836951B2 (en) * 2008-04-09 2010-11-23 Baker Hughes Incorporated Methods and apparatus for collecting a downhole sample
US7841402B2 (en) * 2008-04-09 2010-11-30 Baker Hughes Incorporated Methods and apparatus for collecting a downhole sample
DE102009026032A1 (en) * 2009-06-25 2011-01-05 Dammann Gmbh Herbert Method for cleaning interior space of empty reservoir and/or for stirring reservoir fluid in reservoir in e.g. field sprayer, involves rotating tube around rotation axis between supports, where tube is rotatably supported between supports

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