Down-hole tool filter and method for protecting such tools from fluid entrained debris
First Claim
1. A down-hole tool joint filter assembly comprising tubular sleeve having a disk member attached internally at one end having a plurality of radial slots arranged in expanding concentric circles with said slots in alignment and a pair of parallel slots central to said radial slots said sleeve having a plurality of internal notches located at an end opposite the disk member.
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Accused Products
Abstract
An improved apparatus for filtering down-hole drilling fluids, insertable at any point in the drill string, i.e.: tool joints or within instrument subs. The filter element is a disk insertable between the two threadably connected ends of any two lengths of the drill string or adaptively placed within a tool joint containing down-hole tools such as data gathering instruments. The filter is essentially a disk having a series of expanding concentric radial slots and may be used in combination with an X collar support ring insert, combined with a sleeve having a landing ring or provided with a retrieval means.
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Citations
15 Claims
- 1. A down-hole tool joint filter assembly comprising tubular sleeve having a disk member attached internally at one end having a plurality of radial slots arranged in expanding concentric circles with said slots in alignment and a pair of parallel slots central to said radial slots said sleeve having a plurality of internal notches located at an end opposite the disk member.
- 6. A down-hole tool joint filter assembly comprising a disk member having a plurality of radial slots arranged in expanding concentric circles with said slots in alignment a pair of parallel slots central to said radial slots and a plurality of peripheral notches the assembly further comprising a centralized landing ring having a plurality of support legs cooperative with and insertable within said peripheral notches.
- 8. A down-hole tool joint filter assembly comprising a disk member having a plurality of radial slots arranged in expanding concentric circles with said slots in alignment a pair of parallel slots central to said radial slots and a ring member attached peripherally thereto said ring having equivalent to a beveled portion consistent with a thread relief groove commonly located within internally threaded tubular tool joints.
- 12. A method for intercepting damaging debris entrained within the drilling fluid stream down-hole in oil and gas drilling operations comprising the steps of installing a tool-joint filter disk comprising a plurality of radial slots arranged in expanding concentric circles with said slots in alignment and a pair of parallel slots central to said radial slots within the confines of a thread relief groove commonly located within internally threaded tubular tool joints.
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15. A method for intercepting damaging debris entrained within a drilling fluid stream down-hole in oil and gas drilling operations comprising the steps of:
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a) fabricating a tool-joint filter disk assembly comprising a disk member having a plurality of radial slots arranged in expanding concentric circles with said slots in alignment and a pair of parallel slots central to said radial slots attached within a tubular sleeve having a centralized tubular landing ring supported by a plurality of legs attached internally to said sleeve; and b) locating said filter disk assembly upstream and adjacent to a tubular sub-joint containing an electronic instrument.
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Specification