dsdp technical note 3 - deep sea drilling

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TECHNICAL NOTE NO. 3

RE-ENTRY CONE/TRIPLE CASING HANGER DESIGN

Prepared for theNATIONAL SCIENCE FOUNDATION

National Ocean Sediment Coring ProgramUnder Contract C-482

by the

UNIVERSITY OF CALIFORNIAScripps Institution of OceanographyPrime Contractor for the Project

June 1984

W. A. Nierenberg, Director M. N. A. PetersonScripps Institution of Oceanography Principal Investigator and

Project ManagerDeep Sea Drilling ProjectScripps Institution of Oceanography

iii

INTRODUCTION

Concept development and design of the "Triple Casing Hanger" system beganin October 1976. William Fischer, a consultant with many years of exper-ience in the oil industry was contracted to develop the original conceptbased on the successful "dual casing hanger1* system already in use aboardthe GLOMAR CHALLENGER drill ship.

The triple casing hanger design allowed for deployment of two distinctcasing strings (16" and 11-3/4"), in addition to the 20" conductor pipewashed in with the re-entry cone itself.

Machine drawings and hardware requirements for the system were developedat Deep Oil Technology (now part of Fluor Drilling Services).

A Prototype assembly was fabricated in the fall of 1978. Latch-in andacuation testing of the system was begun but not completed. Additionaltesting should be performed prior to actual sea trials of the system.

INDEX

RE-ENTRY CONE/TRIPLE CASING HANGER SYSTEM

I. OPERATIONAL SEQUENCE DRAWINGS

II. PARTS LIST & MACHINE DRAWINGS

vii

TRIPLE CASING STRING SYSTEM

o SONAR REFLECTORS

DRILL STRING

RE-ENTRYCONE

RE-ENTRY CONE& 20" CASING"JETTED-IN"10-50 METERS

16" CASINGCEMENTED50-300 meters

I

11 3/4" CASINGCEMENTED

300-1000 METERS

18 7/8" HOLE

14 7/8" HOLE

9 7/8" HOLE

TRIPLE CASING STRING

OPERATIONAL SEQUENCE

DRAWINGS 1 THROUGH 4

R-1071-00R-l072-00R-l073-00R-1074-00

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ITEM

OH 4700

OH 4701

OH 4702

OH 4703

OH 4704

OH 4705

OH 4706

OH 4707

OH 4708

OH 4709

OH 4710

OH 4711

OH 4712

OH 4713

OH 4714

OH 4715

OH 4716

OH 4717

OH 4718

OH 4719

OH 4720

OH 4721

i

INDEX - OPERATIONS - DEEP SEA DRILLING PROJECT

DESCRIPTIONTRIPLE CASING SYSTEM

Assembly - Re-entry Cone & 20" x 16" x 11 3/4" Casing Hangers

Assembly - 20" x 16" x 11 3/4" Casing Hanger

Landing Assembly - Re-entry Cone & 20" Casing

Assembly - 20" Casing Hanger

Body - 20" Casing Hanger

Transition Sub - 20" Casing Hanger

Latch Groove Ring - 20" Casing Hanger

Landing Assembly - 16" Casing

Assembly - 16" Casing Hanger

Body - 16" Casing Hanger

Transition Sub - 16" Casing Hanger

16" Latch Retaining Ring - 20" x 16" Assembly

Landing Assembly - 11 3/4" Casing

16" Hex-Kelly Landing Tool Assembly

16" Bushing - 11 3/4" Hex-Kelly

Assembly - .20" Paddle Type Landing Tool

Latch Sleeve - 20" Paddle Type Landing Tool

20" Paddle Actuation

Paddles - 20" Landing Tool Assembly

15 7/8" O.D. Modified Butt Gage

Ribs - 16" Casing Hanger Assembly

Re-entry/Triple Casing String System Assembly

-

DRWG. NO.

D-OH470O

D-OH4701

D-OH4702

D-OH4703

D-OH47O4

C-OH4705

C-OH4706

D-OH4707

D-OH4708

D-OH4709

C-OH4710

C-OH4711

D-OH4712

D-OH4713

D-OH4714

D-OH4715

D-OH4716

D-OH4717

C-OH4718

D-OH4719

B-OH4720

D-OH4721

-9-

DATE August 8, 1983 PAGE 1 OF 1

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