Petroleo
Por: madureira22 • 25/5/2015 • Relatório de pesquisa • 1.396 Palavras (6 Páginas) • 191 Visualizações
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POSITION:- Sub Sea Engineer
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TYPE OF MAINTENANCE Inspection strip down
FREQUENCY By Calculation
Precautions and Warnings
Read data sheets on all products to be used on job and ensure all protective measures are taken and that all related safety equipment is in place and checked to ensure it is in operable condition.
Check and conform to all of the company’s safety procedures and instructions including this document.
Do not attempt field repair of flex joint parts.
This procedure covers only detection and replacement of defective parts. Cameron does not recommend field repair of any flex joint parts.
Hold work site meeting prior to starting job
Special Tools & Equipment Required
Power wrenches, crane and slings hand tools
References to other documentation relating to the task and the equipment
Read MSDS sheets for cleaning products
Procedure
Inspection Data book for riser joint Sn No
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Data on main tube
Data on 15k lines
Data on 5k line
Data on hydraulic lines
Data on riser flange bolts
Data on riser flange nuts
Data on jewellery
Main tube inspection
Description of work
Stripped riser joint of all buoyancy and auxiliary lines and jewellery.
Removed seal sub and all riser bolts and nuts.
1. Inspected the riser box connector at each end of the main tube plus any welds around the tube in addition to the flange attachment welds and repaired as necessary.
2. Cleaned the inside of the box thoroughly with solvent and fresh water.
3. Inspected inside the RF riser connector for damage to the sealing area and
the running tool lock-ring groove area. Remove any small burrs using
#150 emery cloth.( see separate fig showing brinel points)
4. Used dye penetrant testing method and inspected for cracks in the area shown in the following figure. ( The main tube welds were x-rayed; not dye pen tested)
5. Ground out any suspect cracks to determine the depth of the crack.
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6. Cracks greater than.030" (0.76 mm) in depth repaired using Cameron welding specifications
7. Cracks less that .030" (0.76 mm) in depth were not weld-repaired. Blended the ground-out area into the original surface.
8. Lightly coated all internal surfaces and components with a water-resistant
mineral grease.
9. Inspected the seal sub for any signs of damage. Removed any burrs near
the seal groove area using #150 emery cloth.
10. Lightly greased the seals and the grooves with a water-resistant mineral
grease and installed new seals on the seal sub.
11 All main tube welds were x-rayed and films coded and cross referenced to this document.
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X-RAY RESULTS FOR MAIN TUBE WELDS | ||||
POSITION | PASS | FAIL | REPAIR | X-RAY I.D. Number |
BOX END | ||||
PIN END | ||||
MAIN TUBE (BE) | ||||
MAIN TUBE (PE) |
CHECKED FOR SIGNS OF BRINELLING IN THE LOCK RING GROOVE AND DAMAGE TO THE LOAD SHOULDER
PASS | FAIL | DAMAGE |
ACTION | ||
RESULT | ||
RE-INSPECT |
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PERFORMED DIMENSIONAL INSPECTION AS SHOWN IN FIG BELOW
REF TABLE 2
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TABLE 2 | ALLOWABLE BORE WEAR | ||||||||
DUE TO DRILL PIPE OR TOOL WEAR | |||||||||
Connection size Ins 21 X 0.688 | Min pipe wall Ins A | Max bore InsA | Max bore Ins B | Max bore Ins C | Max bore Ins D | ||||
BOX END | 0.619 | 1 | 19. | 1 | 19. | 1 | 19. | 1 | 19. |
BOX END | 0.619 | 2 | 19. | 2 | 19. | 2 | 19. | 2 | 19. |
PIN END | 0.619 | 1 | 19. | 1 | 19. | 1 | 19. | 1 | 19. |
PIN END | 0.619 | 2 | 19. | 2 | 19. | 2 | 19. | 2 | 19. |
Comment |
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THICKNESS CHECK ON MAIN TUBE
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Ser. No | Horizon | A | A1 | B | B1 | C | C1 | D | D1 |
S1 WELD | |||||||||
29-4639-02 | 1 | ||||||||
2 | |||||||||
3 | |||||||||
4 | |||||||||
5 | |||||||||
6 | |||||||||
7 | |||||||||
S2 WELD | |||||||||
8 | |||||||||
9 | |||||||||
10 | |||||||||
11 | |||||||||
12 | |||||||||
13 | |||||||||
14 | |||||||||
S3 WELD | |||||||||
THICKNESS CHECK ON 15K LINE No1 CHOKE
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