Patent EP0077275A2 successfully refreshed from Google Patents.
EP0077275A2
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EP
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Pump-down stinger assembly method and apparatus
Assignee: SLB NV
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Filing: 1982-10-13
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Granted: —
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Expires: 2002-10-13
Abstract
Abstract A pump-down stinger assembly method for use with a well-logging tool or well bore perforator suspended from a well-logging cable utilizes a stinger adaptor which releasably attaches a length of well-logging cable to the lower end of the stinger adapter and allows the well-logging cable to be retrieved and pulled upwardly through a plurality of sections of stinger, or tubing.
Inventors
- 👤 Joachim Hoppe
- 👤 Ralph Simmons
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 17:38
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/08; E21B17/00; E21B17/003; E21B23/14; E21B43/00; E21B43/11; E21B43/119
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
147 words
A pump-down stinger assembly method for use with a well tool suspended from a well-logging cable in a borehole characterized by: lowering a well tool and well-logging cable through a length of drill pipe disposed in the borehole; terminating the well-logging cable proximate the upper end of the borehole to provide a first length of well-logging cable; releasably attaching the first length of well-logging cable to a lower end of a length of stinger; lowering the length of stinger into the drill pipe; retrieving the first length of well-logging cable attached to the lower end of the stinger; raising the first length of well-logging cable through the stinger until the upper end of the first length of well-logging cable is disposed proximate the upper end of the borehole; and securing the upper end of the first length of well-logging cable to a second length of well-logging cable.
Claim 2
Dependent Claim
147 words
A pump-down stinger assembly method for use with a well tool suspended from a well-logging cable in a borehole characterized by: lowering a well tool and well-logging cable through a length of drill pipe disposed in the borehole; terminating the well-logging cable proximate the upper end of the borehole to provide a first length of well-logging cable; releasably attaching the first length of well-logging cable to a lower end of a length of stinger; lowering the length of stinger into the drill pipe; retrieving the first length of well-logging cable attached to the lower end of the stinger; raising the first length of well-logging cable through the stinger until the upper end of the first length of well-logging cable is disposed proximate the upper end of the borehole; and securing the upper end of the first length of well-logging cable to a second length of well-logging cable.
Claim 3
Dependent Claim
30 words
The method of claim 1, characterized by the step of lowering at least a portion of the stinger and the well tool through the drill pipe and into the borehole.
Claim 4
Dependent Claim
54 words
The method of claim 1 or 2, characterized by the step of attaching a locomotive to the stinger and pumping a fluid into the drill pipe into contact with the locomotive to cause at least a portion of the stinger and the well tool to be lowered through the drill pipe into the borehole.
Claim 5
Dependent Claim
60 words
The method of claim 2 or 3, characterized by the steps of raising the upper end of the stinger through the drill pipe and proximate the upper end of the borehole, disassociating the portion of the well-logging cable disposed above the upper end of the borehole from the well tool, and removing the stinger and well-logging tool from the borehole.
Claim 6
Dependent Claim
44 words
The method of claim 4, characterized in that the well-logging cable is disassociated from the well tool by breaking a weak-point associated with the well tool, whereby the well-logging cable may be removed from the stinger by raising the well-logging cable through the stinger.
Claim 7
Independent Claim
40 words
The method of any one of claims 1-4 characterized by the steps of raising at least a portion of the well tool into the lower end of the stinger and securing said portion of the well tool to the stinger.
Claim 8
Dependent Claim
26 words
The method of claim 6 characterized in that the upper end of the well tool is raised and latched into the lower end of the stinger.
Claim 9
Dependent Claim
40 words
The method of claim 7, characterized by the step of providing the lower end of the stinger with a stinger adapter which allows the upper end of the well tool to be latched into the lower end of the stinger.
Claim 10
Independent Claim
42 words
The method of any one of claims 1-4 characterized by the step of placing a spearhead and torpedo on the upper end of the first length of well-logging cable after the well-logging cable is terminated proximate the upper end of the borehole.
Claim 11
Dependent Claim
49 words
The method of claim 9, characterized by the steps of utilizing a stinger adapter at the lower end of the stinger; and the upper end of the first length of well-logging cable is releasably attached to the stinger adapter by the seating of the torpedo within the stinger adapter.
Claim 12
Independent Claim
66 words
The method of any previous claim characterized by the steps of utilizing a spearhead on the upper end of the first length of well-logging cable; utilizing a spearhead overshot on the lower end of the second length of well-logging cable; and retrieving the first length of well-logging cable by lowering the second length of well-logging cable and spearhead overshot until the spearhead overshot engages the spearhead.
Claim 13
Dependent Claim
117 words
The method of claim 1 characterized by the steps of: securing a stinger adapter to the top of a length of drill pipe disposed in the borehole; and in that the lowering of the well-logging cable and the well tool into the length of drill pipe disposed in the borehole is through the stinger adapter; the well-logging cable is terminated proximate the stinger adapter to provide the first length of well-logging cable; the first length of well-logging cable is releasably attached to the stinger adapter to which at least one length of stinger is attached; and the step of lowering the length of stinger into the drill pipe includes releasing the stinger adapter from the drill pipe;
Claim 14
Dependent Claim
30 words
The method of claim 12, characterized by the steps of lowering at least a portion of said stinger and said well tool through the drill pipe and into the borehole.
Claim 15
Dependent Claim
52 words
The method of claim 13, characterized by the step of attaching a locomotive to said stinger and pumping a fluid into the drill pipe into contact with the locomotive to cause at least a portion of the stinger and the well tool to be lowered through said drill pipe into the borehole.
Claim 16
Dependent Claim
60 words
The method of claim 13 or 14 characterized by the steps of raising the upper end of the stinger through the drill pipe and proximate the upper end of the borehole, disassociating the portion of the well-logging cable disposed above the upper end of the borehole from the well tool, and removing the stinger and well tool from the borehole.
Claim 17
Dependent Claim
44 words
The method of claim 15, characterized in that the well-logging cable is disassociated from the well tool by breaking a weak-point associated with the well tool, whereby the well-logging cable may be removed from the stinger by raising the well-logging cable through the stinger.
Claim 18
Independent Claim
38 words
The method of any one of claims 12-16 characterized by the steps of raising at least a portion of said well tool into the stinger adapter and securing said portion of the well tool to said stinger adapter.
Claim 19
Dependent Claim
27 words
The method of claim 17 characterized in that the upper end of said well tool is raised and latched into the lower end of the stinger adapter.
Claim 20
Independent Claim
39 words
The method of any one of claims 12-18 characterized by the step of placing a spearhead and torpedo on the upper end of the first length of well-logging cable after the well-logging cable is terminated proximate the stinger adapter.
Claim 21
Dependent Claim
35 words
The method of claim 19, characterized in that the upper end of the first length of well-logging cable is releasably attached to the stinger adapter by the seating of the torpedo within the stinger adapter.
Claim 22
Independent Claim
68 words
The method of any one of claims 12-18 characterized by the steps of utilizing a spearhead on the upper end of the first length of well-logging cable; utilizing a spearhead overshot on the lower end of the second length of well-logging cable; and retrieving the first length of well-logging cable by lowering the second length of well-logging cable and spearhead overshot until the spearhead overshot engages the spearhead.
Claim 23
Independent Claim
16 words
The method of any previous claim characterized in that the well tool is a well-logging tool.
Claim 24
Independent Claim
28 words
The method of any one of claims 1-21 characterized in that the well tool is a well bore perforator and in that the borehole is a cased borehole.
Claim 25
Dependent Claim
43 words
The method of claim 23, characterized by the steps of lowering at least a portion of the stinger and the well bore perforator through the length of drill pipe and into the cased borehole whereby a desired portion of said borehole is perforated.
Claim 26
Dependent Claim
96 words
A stinger adapter, for use with a length of stinger and a well tool suspended from a well-logging cable in a borehole, characterized by: a length of tubing having first and second ends; means for attaching the length of stinger to said first end of the tubing; means for securing at least a portion of the well tool within the second end of said tubing; means for releasably securing said well-logging cable within said tubing; and means for positioning the tubing above the borehole, said positioning means being disposed on the outer surface of said tubing.
Claim 27
Dependent Claim
96 words
A stinger adapter, for use with a length of stinger and a well tool suspended from a well-logging cable in a borehole, characterized by: a length of tubing having first and second ends; means for attaching the length of stinger to said first end of the tubing; means for securing at least a portion of the well tool within the second end of said tubing; means for releasably securing said well-logging cable within said tubing; and means for positioning the tubing above the borehole, said positioning means being disposed on the outer surface of said tubing.
Claim 28
Dependent Claim
38 words
The stinger adapter of claim 25 characterized in that the means for attaching is a plurality of screw threads disposed at the first end of said tubing for cooperation with mating screw threads on said length of stinger.
Claim 29
Dependent Claim
21 words
The stinger adapter of claim 26 characterized in that said screw threads are disposed on the interior surface of said tubing.
Claim 30
Dependent Claim
28 words
The stinger adapter of claim 25, 26 ot 27 characterized in that the tubing has substantially the same outer cross-sectional configuration and size as the length of stinger.
Claim 31
Dependent Claim
49 words
The stinger adapter of claim 25, 26, 27 or 28 characterized in that the means for securing the well tool is an internal chamber formed in the second end of the tubing, said chamber having an entry passageway into said tubing disposed at the second end of said tubing.
Claim 32
Dependent Claim
26 words
The stinger adapter of claim 29 characterized in that said entry passageway flares inwardly toward said chamber and has a reduced neck portion adjacent said chamber.
Claim 33
Dependent Claim
37 words
The stinger adapter of claim 25, characterized in that the means for securing the well tool is a tube having an outside diameter compatible with the diameter of barbs of a grapple attached to the well tool.
Claim 34
Dependent Claim
34 words
The stinger adapter of any one of claims 25-31 characterized in that the means for releasably securing the well-logging cable is a seating surface disposed within the tubing intermediate the first and second ends.
Claim 35
Dependent Claim
47 words
The stinger adapter of claim 32, characterized in that said seating surface has an opening therein for allowing a portion of the well-logging cable to pass therethrough, the opening being smaller than the cross-sectional configuration of a second portion of the well-logging cable and the well tool.
Claim 36
Dependent Claim
55 words
The stinger adapter of any one of claims 25-33 characterized in that the means for positioning the tubing is a radial groove formed in the outer surface of the tubing and disposed intermediate the first and second ends of the tubing, and a removable plate member for selective insertion into, and removal from, the groove.
Claim 37
Dependent Claim
19 words
The stinger adpater of any one of claims 25-34 characterized in that said well tool is a well-logging tool.
Claim 38
Dependent Claim
20 words
The stinger adapter of any one of claims 25-34 characterized in that said well tool is a well bore perforator.
References Cited (Backward Citations)
No citation records indexed.
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