Patent EP0811747A2 successfully refreshed from Google Patents.
EP0811747A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Downhole tool and method for use of the same
Assignee: Halliburton Energy Services Inc
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Filing: 1997-05-19
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Granted: —
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Expires: 2017-05-19
Abstract
Abstract A downhole tool (38) comprises a housing (42) having a fluid passageway (84), a mandrel (44) having an interior volume (50), the mandrel (44) being slidably disposed within the housing (42), and the mandrel (44) having a plurality of axial positions relative to the housing (42). The mandrel (44) is slidably operated responsive to the fluid pressure within the interior volume (50) such that the mandrel (44) cycles through the plurality of positions. A retractor sleeve (64) is operably associated with the housing (42) and the mandrel (44) for engaging the mandrel (44) and slidably urging the mandrel (44) relative to the housing (42). The retractor sleeve (64) is slidably operated responsive to the fluid pressure within the interior volume (50). A seal assembly (72) is slidably disposed around the housing (42), the seal assembly (72) including a floating piston, the housing (42) and the floating piston defining a chamber (84) therebetween. The chamber (84) is in communication with the fluid passageway (84) of the housing (42) such that the fluid pressure within the interior volume (50) enters the chamber (84) and slidably urges the seal assembly (72) to stretch the seal assembly (72).
Inventors
- 👤 Paul D. Ringgenberg
- 👤 Roger L. Schultz
- 👤 Neal G. Skinner
- 👤 Margaret C. Waid
- 👤 Curtis E. Wendler
- 👤 Robert W. Srubar
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 02:55
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B34/102; E21B23/00; E21B23/004; E21B23/006; E21B33/00; E21B33/10; E21B33/12; E21B33/128; E21B33/1285; E21B49/00; E21B49/08; E21B49/081; E21B49/0815
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
A downhole tool (38) comprising: a housing (42); and a mandrel (44) having an interior volume (50), said mandrel (44) slidably disposed within said housing (42), said mandrel (44) having a plurality of positions relative to said housing (42), said mandrel (44) slidably operated responsive to a fluid pressure within said interior volume (50) such that said mandrel (44) cycles through said plurality of positions.
Claim 2
Dependent Claim
74 words
A downhole tool (38) according to claim 1, wherein said mandrel (44) further includes an upset (128) and wherein said housing (42) further includes a load spring (70) having a first upset (124) which interferes with said upset of said mandrel (44) for supporting said mandrel (44) and allowing said mandrel (44) to slide axially relative to said housing (42) when said fluid pressure within said interior volume (50) reaches a first predetermined level.
Claim 3
Dependent Claim
86 words
A downhole tool (38) comprising: a housing (42) having a fluid passageway (84) and an interior volume; and a seal assembly (72) slidably disposed around said housing (42), said seal assembly (72) including a floating piston (80), said housing (42) and said floating piston (80) defining a chamber (82) therebetween, said chamber (82) in communication with said fluid passageway (84) such that when a fluid pressure within said interior volume enters said chamber (82), said fluid pressure urges said seal assembly (72) in a first direction.
Claim 4
Dependent Claim
22 words
A downhole tool (38) according to claim 3, wherein said seal assembly (72) further comprises first (74) and second (78) seal elements.
Claim 5
Dependent Claim
73 words
A downhole tool (38) comprising: a housing (42); a mandrel (44) having an interior volume (50) and slidably disposed within said housing (42); and a retractor sleeve (64) operably associated with said housing (42) and said mandrel (44), said retractor sleeve (64) engageable with said mandrel (44) for slidably urging said mandrel (44) relative to said housing (42), said retractor sleeve (64) slidably operated responsive to said fluid pressure within said interior volume.
Claim 6
Dependent Claim
25 words
A downhole tool (38) according to claim 5, wherein said retractor sleeve (64) is slidably rotatable relative to said housing (42) and said mandrel (44).
Claim 7
Dependent Claim
188 words
A downhole tool (38) comprising: a housing (42) having a fluid passageway (84); a mandrel (44) having an interior volume (50), said mandrel (44) slidably disposed within said housing (42), said mandrel (44) having a plurality of positions relative to said housing (42), said mandrel slidably operated responsive to a fluid pressure within said interior volume (50) such that said mandrel (44) cycles through said plurality of positions; a retractor sleeve (64) operably associated with said housing (42) and said mandrel (44), said retractor sleeve (64) engageable with said mandrel (44) for slidably urging said mandrel (44) relative to said housing (42), said retractor sleeve (64) slidably operated responsive to said fluid pressure within said interior volume (50); and a seal assembly (72) slidably disposed around said housing (42), said seal assembly (72) including a floating piston (80), said housing (42) and said floating piston (80) defining a chamber (82) therebetween, said chamber (82) in communication with said fluid passageway (84) such that when said fluid pressure within said interior volume (50) enters said chamber (82), said fluid pressure urges said seal assembly (72) in a first direction.
Claim 8
Dependent Claim
73 words
A downhole tool (38) according to claim 7, wherein said mandrel (44) further includes an upset (128) and wherein said housing (42) further includes a load spring (70) having first (124) and second (126) upsets which interfere with said upset (128) of said mandrel (44) for supporting said mandrel (44) and allowing said mandrel (44) to slide axially relative to said housing (42) responsive to said fluid pressure within said interior volume (50).
Claim 9
Independent Claim
164 words
A method of operating a downhole tool (38) comprising the steps of: running the downhole tool (38) into a wellbore (40), the downhole tool (38) having a housing (42), a mandrel (44) slidably disposed within said housing (42) and a retractor sleeve (64) operably associated with said housing (42) and said mandrel (44); increasing the fluid pressure inside the downhole tool (38); axially sliding said mandrel (44) relative to said housing (42) in a first direction; increasing the pressure inside the downhole tool (38); axially sliding said retractor sleeve (64) relative to said housing (42) in said first direction; rotatably sliding said retractor sleeve (64) relative to said housing (42); engaging said retractor sleeve (64) with said mandrel (44); decreasing the pressure inside the downhole tool (38); axially sliding said retractor sleeve (64) and said mandrel (44) relative to the housing (42) in a second direction; decreasing the pressure inside the downhole tool (38); and disengaging said retractor sleeve (64) from said mandrel (44).
Claim 10
Dependent Claim
35 words
A method according to claim 9 further including the steps of connecting the downhole tool (38) proximate the lower end of a drill string (30) above a drill bit (32) and drilling said wellbore (40).
References Cited (Backward Citations)
No citation records indexed.
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