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API Spec 5CT Introduction

Date post: 27-Dec-2015
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Oil & Gas
37
UNDERSTANDING OF API Spec 5CT PRODUCTS
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Page 1: API Spec 5CT Introduction

UNDERSTANDING OF API Spec 5CT PRODUCTS

Page 2: API Spec 5CT Introduction

OIL COUNTRY TUBULARS GOODS

Page 3: API Spec 5CT Introduction

CASING &

TUBING

Page 4: API Spec 5CT Introduction

CASING

Casing is a Pipe run from the surface and intended to line the wall of a

drilled Wall.

It is a permanent part of the well in which bottom sections of casing are

cemented in place.

Page 5: API Spec 5CT Introduction

CASING

Casing is manufactured from a Seamless Pipe.

The casing is both end threaded and assembled with coupling at

one end

Page 6: API Spec 5CT Introduction

CASING

Casing will be SELECTED by (as a Minimum)

A) Size (OD) B) Weight (PPF) or Wall Thickness C) Grade D) End Connection

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CASING

4 ½

SIZES

8 5/8” 5 9 5/8” 5 5 ½” 6 5/8”

10 ¾” 11 ¾”

13 3/8” 7

7 5/8”

16” 18 5/8”

20”

Page 8: API Spec 5CT Introduction

CASING GRADES

H40 J55 K55 N80 R95 M65 L80 C90 T 95 C110 P110 Q125

Page 9: API Spec 5CT Introduction

CASING

TYPE OF END CONNECTIONS

1. PLAIN END (Beveled End)

2. ROUND CASING A) Short Round B) Long Round

3. BUTTRESS CASING

4. EXTREME-LINE CASING

Page 10: API Spec 5CT Introduction

TUBING Relatively small-diameter pipe that is run into a well to serve as a conduit for the passage of oil and gas to the surface.

The tubing may be isolated from casing by Production packer

Tubing is removed from the hole and at times is replaced.

Tubing is manufactured from a Seamless Pipe.

Page 11: API Spec 5CT Introduction

TUBING SELECTION OF TUBING

TUBING WILL BE SELECTED BY

1) Size 2) Weight 3) Grade 4) End preparation ( NUT or EUT)

Page 12: API Spec 5CT Introduction

TUBING SIZE (OD OF THE Tubing)

1. Ø 1.050 7. 2 3/8 2. Ø 1.315 8. 2 7/8 3. Ø 1.660 9. 3 ½ 4. Ø 1.900 10. 4

5. Ø 2.063 11. 4 ½”

Page 13: API Spec 5CT Introduction

TUBING

GRADE

1. H40 5. C90 2. J55 6. T95 3. L80 7. P110 4. N80

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TUBING

END PREPARATION

1. Non Upset End

2. External Upset End

Page 15: API Spec 5CT Introduction

TUBING

END CONNECTIONS 1. Non Upset Tubing

Ø1.050 to 3 1/2” – 10 TPI (Round Form) 4” & 4 ½” – 8 TPI (Round Form)

2. External upset Tubing Ø1.050 to 1.900” – 10 TPI (Round Form) Ø2 3/8” & 4 ½” – 8 TPI (Round Form)

Page 16: API Spec 5CT Introduction

LINE PIPE

Page 17: API Spec 5CT Introduction

LINE PIPE

Line pipe is used transfer the Hydrocarbons from one place to another.

These are may be manufactured as seamless or seam welded pipes

Page 18: API Spec 5CT Introduction

Gauging, Inspection of Casing, Tubing, Line pipe

threads

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Casing & Tubing

8 TPI ¾ TPF 10TPI ¾” TPF

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Round Thread – Thread Inspection

Taper : Taper is measured over the last perfect thread to end of pipe length for round thread casing.

The taper is designated in API spec 5B as ¾-in taper per ft of thread length. However, for inspection purposes this taper, including the appropriate tolerance, is rounded to the equivalent of 0.060 to 0.068 in. per in. The use of a ½-in. gauge length results in dividing tolerances by two or 0.030 to 0.034in. per

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Round Thread – Thread Inspection

Lead : Lead is usually measured at 1-inch. Intervals Cumulative lead is measured over the L4-g crested threads from the end of the pipe. Only perfect (full-crested) threads shall be included in the cumulative lead measurement. The thread should be provided with a longitudinal line divided into 1-in. (1/2”).

Page 22: API Spec 5CT Introduction

Round Thread – Thread Inspection Thread Height : Thread height (depth) is the measurement of the distance from the thread root to the thread crest normal to the thread axis. Place the tip of the thread height gauge in the thread groove and anvil of the gauge resting on top of full-crested threads. The anvil shall be held in firm contact with the thread crests. The gauge shall be aligned with the axis of threads by rocking the gauge about the longitudinal axis of the anvil. The thread height is indicated correctly when the dial indicator stops moving near the center of the rocking motion, the null point.

Page 23: API Spec 5CT Introduction

Round Thread – Thread Inspection

Stand-off : Standoff is the distance measured axially between the end of the pipe or coupling and the stand off position of the ring or plug gauge

Long Pin Threads

The distance the long pin extends beyond the short ring gauge is determined from Formula Distance = L1 (long) - L1(short) – P1 Where L1 (Long) = is the length from the end of long pin to hand-tight place. L1 (short) = is the length from the end of the short pin to hand-tight place. P1 = is the standoff between the short working ring gauge and the certified master plug gauge Values of L1(long) – L1 (short) have been determined The distance the long pin extends beyond the short ring gauge may not exceed the ‘distance”Formula ± 1 thread.

Page 24: API Spec 5CT Introduction

Round Thread Basic Hand tight Makeup

Page 25: API Spec 5CT Introduction

Round Thread – External threads

Total Thread Length: Total thread length, the L4 dimension is measured parallel to the thread axis from the end of the pipe to vanish point of the thread tool-mark. The measurement is made using a metal scale or caliper. Min Full Crest Thread Length: The length measured parallel to the thread axis from the end of the pipe to the first non-full-crested thread. In this length there should not be any Black Crested Threads.

Round Thread – Internal threads

Dia of Coupling Recess Depth of coupling recess Coupling Length

Page 26: API Spec 5CT Introduction

1.ThreadProfile: Buttrress Casing

Page 27: API Spec 5CT Introduction

BUTTRESS Thread – Thread Inspection

Taper : Taper is defined as the change in diameter along the minor cone of the external threads and the major cone of the internal threads. Unlike other threads, two areas of the buttress threads must be inspected: the perfect threads and the imperfect threads. The taper of the perfect threads is inspected at 1-in. intervals, overlapping as necessary to inspect the entire length. A similar procedure is applied to the imperfect thread up to the run-out. Only perfect thread tapers and tolerances are determined.

Page 28: API Spec 5CT Introduction

BUTTRESS Thread – Thread Inspection

Lead : The gauge should register zero when applied to the setting standard. The adjustment to establish the zero reading is the same as outlined. Pressure shall be applied against the gauge so the thread contact points are in contact with the load flank (3° flank) and thread root simultaneously. Lead is inspected over the perfect thread length. Cumulative lead is the lead measured starting with the first perfect thread over an interval which the largest multiple of 1 inch.

Page 29: API Spec 5CT Introduction

Buttress Thread – Thread Inspection Thread Height : Verification of buttress thread depth shall be performed at the first perfect thread (full – crested threads on either side of the root) and at 1-in. intervals along the pin until the first black-crested thread is encountered with the L7 length.

The coupling thread height inspection commences at J + 1 thread from the center of the coupling and progresses at 1-in. intervals to the first perfect thread

Page 30: API Spec 5CT Introduction

Butteress Thread – Thread Inspection Run-out : Thread run-out is the measurement of the abruptness with which the buttress thread is terminated at the triangle end of the thread. The run-out gauge is a three- point gauge having two fixed points and one movable point attached to a balanced-dial indicator. The run-out gauge indicator shall be set to zero using a flat surface as a setting standard. If the thread terminates before the apex of the triangle, the movable pointer is placed in the last thread groove 90 degree prior to the thread termination and the gauge transverse clockwise until the pointer exists the thread groove and rides on the pipe surface. The run-out is satisfactory if the dial indicator does not exceed +0.005in. during the traverse of the thread groove.

Page 31: API Spec 5CT Introduction

Buttress Thread Basic Hand tight Makeup

PLANE OF CENTER OF COUPLING

PLANE OF END OF PIPE (POWER TIGHT)

PLANE OF END OF PIPE (HAND TIGHT)

PLANE OF VANISH POINT

PLANE OFPERFECT THREAD LENGTH

PLANE OF FIRST CONTACT WITH TRAINGLE STAMP

Page 32: API Spec 5CT Introduction

Buttress Thread – External threads

Total Thread Length: Total thread length, the L4 dimension is measured parallel to the thread axis from the end of the pipe to vanish point of the thread tool-mark. The measurement is made using a metal scale or caliper. Min Full Crest Thread Length: The length measured parallel to the thread axis from the end of the pipe to the first non-full-crested thread. In this length there should not be any Black Crested Threads.

Buttress Thread– Internal threads

Coupling Length

Page 33: API Spec 5CT Introduction

LINE PIPE Thread – External threads

Page 34: API Spec 5CT Introduction

LINE PIPE Thread – External threads

Line Pipe Pitch:

Ø 1/8” 27 TPI Ø ¼” & 3/8” 18TPI Ø 1/2” – 3/4” 14 TPI Ø 1” – 2” 11 ½ TPI Ø 2 ½” – 20” 8 TPI

Page 35: API Spec 5CT Introduction

LINE PIPE Thread – External threads

All thread and linear measurements are same as round threads

Page 36: API Spec 5CT Introduction

Popular Premium threads :

1) VAM ( Vallourec & Mannesmann)

EX: VAM TOP, VAM FJL, DINO VAM

2) NS Technologies

NSCC & NSCT

Page 37: API Spec 5CT Introduction

3) JFE Technologies

FOX, Bear

4) Tennaris Hydril

Blue, Dopeless, Wedge series 500, STL, TCII. 5) Hunting Seal Lock HT, Seal Lock Boss


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