UST978002I4 - Technique for cementing casing in deviated boreholes - Google Patents

Technique for cementing casing in deviated boreholes Download PDF

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Publication number
UST978002I4
UST978002I4 US05/850,125 US85012577A UST978002I4 US T978002 I4 UST978002 I4 US T978002I4 US 85012577 A US85012577 A US 85012577A US T978002 I4 UST978002 I4 US T978002I4
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US
United States
Prior art keywords
centralizers
casing string
borehole
deviated
interest
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Pending
Application number
US05/850,125
Inventor
Joseph U. Messenger
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Publication date
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Priority to US05/850,125 priority Critical patent/UST978002I4/en
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Publication of UST978002I4 publication Critical patent/UST978002I4/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/14—Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

this specification discloses a well completion method for deviated boreholes and in particular a schedule for placing wipers and centralizers along a casing string to be cemented in a deviated borehole to facilitate the reciprocation and cementing thereof in the borehole. A plurality of wipers spaced a first selected distance one from the other are positioned on a portion of the casing string to be located adjacent a zone of interest in the deviated portion of the borehole. A first plurality of centralizers are also positioned on the casing string on the portion to be located adjacent the zone of interest and a second plurality and a third plurality of centralizers are positioned on the casing string, respectively, below and above the zone of interest. The centralizers of the first, second and third pluralities are all spaced a second selected distance, one from the other. Above the third plurality of centralizers other centralizers are positioned on the casing string and the spacing thereof is increased in such a way as to provide for a gradual slope down of the casing string from the centralized portion of the borehole to the lower side thereof. Thereafter, the casing string is characterized by an absence of centralizers along the portion thereof which rests on the lower side of the deviated portion of the borehole. Centralizers are again located on the casing string through the transition from the deviated portion of the borehole to a vertical portion thereof.
US05/850,125 1977-11-10 1977-11-10 Technique for cementing casing in deviated boreholes Pending UST978002I4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/850,125 UST978002I4 (en) 1977-11-10 1977-11-10 Technique for cementing casing in deviated boreholes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/850,125 UST978002I4 (en) 1977-11-10 1977-11-10 Technique for cementing casing in deviated boreholes

Publications (1)

Publication Number Publication Date
UST978002I4 true UST978002I4 (en) 1979-01-02

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ID=25307324

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/850,125 Pending UST978002I4 (en) 1977-11-10 1977-11-10 Technique for cementing casing in deviated boreholes

Country Status (1)

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US (1) UST978002I4 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291193A1 (en) * 1987-05-13 1988-11-17 Cherrington Corporation Method for cementing a production conduit within an underground arcuate bore

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291193A1 (en) * 1987-05-13 1988-11-17 Cherrington Corporation Method for cementing a production conduit within an underground arcuate bore

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UST978002I4 (en) Technique for cementing casing in deviated boreholes