Clamped detector
阅读：200发布：2023-07-11
专利汇可以提供Clamped detector专利检索，专利查询，专利分析的服务。并且A composite detector particularly useful in seismic exploration is disclosed, with means to clamp the detector in a borehole so that a vertical traverse can be made. The tool includes the features of a moveable clamping system, a dual hydraulic system to protect delicate components from the pressure of the borehole fluid, a fail-safe interposed between the final hydraulic system and the clamping pistons, and a jettisonable weight to facilitate downward motion of the tool into the borehole.，下面是Clamped detector专利的具体信息内容。
1. In a geophysical exploration tool, the combination comprising a generally elongated body member to facilitate movement of said tool in a borehole in the earth, a pair of piston assemblies mounted one piston assembly in closely spaced relation to each end of said elongated body member, means for supplying hydraulic fluid under pressure to said piston assemblies, open conduit means for said hydraulic fluid interconnecting said piston assemblies, whereby said pistons operate in a differential mode of operation, and disconnect means for connecting the assemblage of said piston assemblies and said conduit means into said tool body member, whereby the assemblage of said two piston assemblies and said conduit means may be readily moved from one tool to another.
2. The combination of claim 1, each of said piston assemblies comprising a piston housing block having a cross-sectional shape similar to the cross-sectional shape of said elongated body member, a piston member slidably mounted in said housing block on an axis disposed generally perpendicular to the axis of said elongated body member, said piston member comprising a hollow piston shaft having a flanged inner end communicating with said open conduit means, whereby said piston shaft may have a length substantially equal to the diameter of said elongated body member and access may be had by said hydraulic fluid to said piston shaft via said flanged inner end in the retracted position of said piston.
3. The combination of claim 2, and a bead around the outside end surface of said flanged inner end to define the limit of extent of said piston out of said piston housing block.
4. The combination of claim 1, and spring means biasing said piston to the retracted position of said piston within said elongated body.
5. The combination of claim 1, and spring means disposed inside said hollow piston shAft for biasing said piston to the retracted position within said housing block.
6. The combination of claim 1, and a second hollow piston shaft nested within said first mentioned piston shaft, whereby a telescoping piston shaft is provided to extend the reach of said piston assemblies in a borehole.
7. The combination of claim 1, failsafe means interposed in said hydraulic fluid supply means for retracting said pistons in the event of a power failure in said hydraulic fluid supply means.
8. The combination of claim 7, said failsafe means comprising a piston member mounted on a hollow shaft, means to mount said elongated body member on one end of said hollow shaft, means to normally flow said hydraulic fluid through said hollow shaft from said supply to said piston assemblies, said mounting means including selectively destructible means, means to move said hollow shaft with said piston member thereon upon destruction of said destructible mounting means to create a vacuum pressure at the second end of said hollow shaft opposite said one end, whereby hydraulic fluid is drawn away from said piston assemblies through said failsafe hollow shaft by said vacuum pressure.
9. The combination of claim 8, said moving means comprising a failsafe body member comprising a chamber in which said piston member is mounted for axial motion with respect to said hollow shaft, a closure member secured to said body member defining said chamber, and means to vent said chamber from that side of said piston member associated with said one end of said hollow shaft, whereby the motion of said hollow shaft and piston member from the side of said second end to the side of said one end to create said vacuum pressure is facilitated.
10. The combination of claim 8, wherein said selectively destructible means comprises an array of overlapping flanges mounted partly on said hollow shaft and partly on said failsafe, whereby said destructible means may be destroyed by pulling on the cable attached to the upper end of said borehole tool in the event said tool should become stuck in said borehole.
11. The combination of claim 1, and jettisonable weight means removably attached to the lower end of said elongated body, said jettisonable weight means including spring means having a portion adapted to grasp cooperating portions in said geophysical exploration tool, and said spring means including a portion cooperable with the lower one of said pair of piston assemblies, whereby extension of said lower piston assembly acts on the associated portion of said spring means to cause said grasping portion of said spring means to release and disengage said jettisonable weight means from said geophysical exploration tool.
12. A system for generating pressurized hydraulic fluid in an elongated geophysical exploration tool for use in a borehole, the combination comprising a fluid and pressure tight bay of said tool and an open bay of said tool, a bulkhead separating said bays, an electrical motor in said fluid and pressure tight bay, rotational to translational motion transducer means driven by said motor in said fluid and pressure tight bay, a first dual acting hydraulic piston in said fluid and pressure tight bay driven by said transducer means, means to pass the hydraulic lines from said first piston through said bulkhead in said tool separating said fluid and pressure tight bay and said open bay, a second dual acting hydraulic piston in said open bay directly driven from said hydraulic lines from said first piston, and a pressure chamber in said open bay driven by said second piston to supply hydraulic fluid to a portion of said tool being serviced, whereby the hydraulic fluid from said pressure chamber is in a hydraulic system separate from the hydraulic system which includes said first and second dual acting pistons.
13. The combination of claim 12, and bypassing means interconnecting the hydraulic lines between said first and second dual acting hydraulic pistons, said bypassing means including a mAnually operable on-off valve and being located in said fluid and pressure tight bay, whereby said second dual acting piston and said pressure chamber may be cut off from said electric motor and said first dual acting hydraulic piston.
14. The combination of claim 12, said pressure chamber including a piston assembly therein, said piston assembly comprising a portion of predetermined area exposed to the environment in said open bay, whereby the hydrostatic pressures on that side of said pressure chamber having said portion of predetermined area in said open bay is substantially equal to the hydrostatic pressures on the moving parts of said tool serviced from the other side of said chamber to thereby equalize said hydrostatic pressures and eliminate the need to supply energy from said motor to overcome any difference in said pressures.
15. Th combination of claim 12, wherein said portion of said tool being serviced comprises piston means located below said first and second hydraulic systems, and failsafe means interconnecting said pressure chamber and said piston means.
16. The combination of claim 15, wherein said failsafe means comprises a piston member mounted on a hollow shaft, a body member defining a closed chamber for movement of said piston member therein, means to normally flow pressurized hydraulic fluid from said pressure chamber to the upper end of said hollow shaft and through said hollow shaft and to said piston means, destructible mounting means interconnecting said hollow shaft and said piston means, means to vent the space normally below said piston member to said fluid and pressure tight bay through said bulkhead, whereby a failure in at least one of said hydraulic systems and destruction of said mounting means and concommitant motion of said piston member from the upper end towards the lower end of said chamber will create a vacuum pressure at the upper end of said hollow shaft to thereby relieve the hydraulic pressure on said piston means.
17. The combination of claim 15, said piston means comprising a pair of piston assemblies mounted in tandem in said exploration tool in closely spaced relation one to each end of said tool, an open conduit for said pressurized hydraulic fluid from said pressure chamber interconnecting said piston assemblies, and rapid disconnect means hydraulically connecting the assemblage of said pair of piston assemblies and said conduit into said tool.
18. The combination of claim 17, each of said piston assemblies comprising a piston housing block having a cross-sectional shape similar to the cross-sectional shape of said elongated body member, a piston member slidably mounted in said housing block on an axis disposed generally perpendicular to the axis of said elongated body member, said piston member comprising a hollow piston shaft having a flanged inner end communicating with said open conduit, whereby said piston shaft may have a length substantially equal to the diameter of said elongated body member and access may be had by said hydraulic fluid to said piston shaft via said flanged inner end in the retracted position of said piston.
19. The combination of claim 18, and spring means disposed inside said hollow piston shaft for biasing said piston to the retracted position within said housing block.
20. A failsafe for use in a hydraulic system between a source of pressurized hydraulic fluid and a utility being serviced by said hydraulic fluid, the combination comprising a piston member mounted on a hollow shaft, means to mount the utility being serviced on one end of said hollow shaft, said mounting means comprising selectively destructible means, means to normally flow the hydraulic fluid through said hollow shaft from said source to said utility, means to move said hollow shaft with said piston member thereon upon destruction of said destructible mounting means to create a vacuum pressure at the second end of said hollow shaft opposite said one end, whereby hydraulic fluid is drawn away from the utility bEing serviced by said vacuum pressure.
21. The combination of claim 20, said moving means comprising a failsafe body member comprising a chamber in which said piston member is mounted for axial motion with respect to said hollow shaft, a closure member secured to said body member defining said chamber, and means to vent said chamber from that side of said piston member associated with said one end of said hollow shaft, whereby the motion of said hollow shaft and piston member from the side of said second end to the side of said one end to create said vacuum pressure is facilitated.
22. The combination of claim 20, wherein said hollow shaft is oriented substantially vertically, said utility being serviced comprises a cable mounted borehole geophysical exploration tool, said hydraulic fluid source comprises a portion of said tool located above said failsafe, said utility being serviced comprises a portion of said tool mounted below said failsafe, and said selectively destructible means comprises an array of overlapping flanges mounted partly on said hollow shaft and partly on said failsafe, whereby said destructible means may be destroyed by pulling on the cable attached to the upper end of said borehole tool in the event said tool should become stuck in said borehole.
23. The combination of claim 22, said array of overlapping flanges comprising an outwardly extending annular flange mounted on said hollow shaft adjacent the lower end thereof, an outwardly extending annular flange mounted on a portion of said failsafe, and an intermediate member and a flange sleeve nested together and interconnecting said hollow shaft flange and failsafe flange, and said destructible means further comprising a plurality of shear members interconnecting said nesting portions of said intermediate member and said flanged sleeve.
24. The combination of claim 23, said intermediate member and said flanged sleeve being of axially split construction, a cage retainer member on said intermediate member and said flanged sleeve to hold the split halves of said intermediate member and said flanged sleeve together, said cage retainer member having an open bottom end, and means to hold said cage retainer member on said failsafe, whereby said flanged sleeve is free to fall out of the open bottom end of said cage retainer member upon destruction of said shear members.
25. A jettisonable weight for use with a borehole tool having a portion which can be selectively extended radially outwardly of the tool, the combination comprising an adapter member having connection means at its lower end for connecting weight increasing thereto, the upper end of said adapter member having an internal cross-sectional shape adapted to receive the lower end of said tool, spring means on said adapter member having a portion adapted to grasp cooperating portions in said tool, and said spring means including a portion cooperable with said selectively extensible means, wherein extension of said extensible means acts on the associated portion of said spring means to cause said grasping portion of said spring means to release said adapter member with said weight increasing means thereon from said tool.
26. The combination of claim 25, said extensible means comprising a hydraulic piston located closely adjacent the lower end of said tool, said spring means comprising a pair of elongated flat springs mounted in suitably formed slots in said adapter member, said grasping portion of said spring means comprising a pair of blocks extending radially inwardly from the upper ends of said flat springs, and said cooperating portion in said tool comprising openings adapted to receive said blocks.
27. The combination of claim 25, said weight increasing means comprising weighted conduit means.
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