EP0370606A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Downhole well fluid sampling tool
Assignee: Halliburton Co
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Filing: 1989-09-01
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Granted: —
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Expires: 2009-09-01
Abstract
Abstract A downhole tool for sampling well fluids comprises a sampler (18), an actuator cylinder (68) positioned above a packer (20) and a valve body (110) below the packer. An operating mandrel (50) opens a valve below the packer (20) to allow fluid to flow from a well annulus defined below the packer, to a sampling chamber (60) in the sampler (18) above the packer (20). The operating mandrel (50) is movable in response to a pressure differential between the well annulus above the packer and the tool. A second packer may be positioned below the first packer to sealingly engage the well bore below the well formation.
Inventors
- 👤 Gary D. Zunkel
- 👤 Harold Kent Beck
- 👤 Jon B. Christensen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 12:04
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B34/00; E21B34/06; E21B34/10; E21B34/102; E21B34/103; E21B43/1185; E21B43/11852; E21B49/00; E21B49/001; E21B49/08; E21B49/081; E21B49/0813
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A downhole tool (10;10′) for use in a well bore (16), said tool comprising housing means (38) for attaching to a tool string (12); packer means (20) for sealingly engaging said well bore (16) such that a well annulus portion is defined above (138) and below (136;136′) said packer means (20); sampler means (18) disposed above said packer means (20) for receiving a well fluid sample without flowing well fluids into said tool string; and activator means (50) for providing fluid communication between said sampler means (18) and said well annulus portion (136;136′) below said packer means, said activator means (50) being movable in response to a pressure in said well annulus portion (138) above said packer means.
Claim 2
Dependent Claim
118 words
A downhole tool (10;10′) for use in a well bore (16), said tool comprising housing means (38) for attaching to a tool string (12); packer means (20) for sealingly engaging said well bore (16) such that a well annulus portion is defined above (138) and below (136;136′) said packer means (20); sampler means (18) disposed above said packer means (20) for receiving a well fluid sample without flowing well fluids into said tool string; and activator means (50) for providing fluid communication between said sampler means (18) and said well annulus portion (136;136′) below said packer means, said activator means (50) being movable in response to a pressure in said well annulus portion (138) above said packer means.
Claim 3
Dependent Claim
36 words
A tool according to claim 1, wherein said activator means (50) is movable from a first closed position (Fig. 3A,3B) to an open position and from said open position to a second closed position (Fig. 4A,4B).
Claim 4
Dependent Claim
22 words
A tool according to claim 2, further comprising shear means (90) for shearably holding said activator means in said first closed position.
Claim 5
Dependent Claim
24 words
A tool according to claim 2 or 3, further comprising locking means (94) for locking said activator means (50) in said second closed position.
Claim 6
Dependent Claim
42 words
A tool according to any of claims 1 to 4, wherein said packer means is a first packer means (20); and said tool further comprises a second packer means (32) for sealingly engaging said well bore below said first packer means (20).
Claim 7
Dependent Claim
34 words
A tool according to claim 5, wherein said activator means (50) provides communication between said sampler means (18) and a well annulus portion (136′) defined between said first (20) and second packer means (32).
Claim 8
Dependent Claim
42 words
A tool according to any of claims 1 to 6, further comprising passageway means (106) in said housing means (38) for communicating between said sampler means (18) and a portion (110) of said housing means (38) below said (first) packer means (20).
References Cited (Backward Citations)
No citation records indexed.
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