New Higher Strength Coiled Tubing Developed to Extend Coiled Tubing - - PowerPoint PPT Presentation

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Sep 30, 2022 255 likes •433 views

New Higher Strength Coiled Tubing Developed to Extend Coiled Tubing Operating Envelopes W. D. (Don) Van Arnam The Need for Higher Strength Well depths are increasing, many with long horizontal sections. Operations cannot be performed

SLIDE 1

New Higher Strength Coiled Tubing Developed to Extend Coiled Tubing Operating Envelopes

W. D. (Don) Van Arnam

SLIDE 2

The Need for Higher Strength

Well depths are increasing, many with long

horizontal sections.

– Operations cannot be performed with existing coiled tubing grades due to axial load limitations.

Wellhead pressures are increasing

– Require significantly higher pumping pressure while cycling tubing from reel to well and back. – Existing grades dilate rapidly and encounter physical restrictions.

SLIDE 3

Design Requirements

130,000 psi min specified yield strength. Maximum difference between actual tensile and yield strengths. Consistently exceed fatigue cycle life of comparable size QT-1000.

SLIDE 4

High Strength Design Requirements

Be able to consistently manufacture and service with existing equipment. Strip-to-strip bias welds – must be weldable by current process. Tube-to-tube welds – must be weldable by current process.

SLIDE 5

High Strength Requirements

Physical Property Value Minimum Yield Strength 130,000 PSI (125,000 PSI @ Bias) Minimum Tensile to Yield Difference 4,000 PSI Minimum Elongation 750,000 A0.2/U0.9 Maximum Hardness Rockwell “C” 37 Notes on Elongation: A = Cross Sectional Area of Tubing U = Specified Minimum Tensile Strength of Tubing

SLIDE 6

Tubing Mechanical Properties

Diameter (in) Wall Thickness (in) Yield Strength (psi) Tensile Strength (psi) Elongation (%) 1.75 0.134 138,500 143,600 24.5 1.75 0.156 145,800 150,200 22.5 1.75 0.175 146,200 151,600 22.0 1.75 0.188 141,600 147,400 22.5 1.75 0.203 144,700 150,000 27.5 2.00 0.134 141,200 146,200 24.5 2.00 0.156 143,600 149800 23.5 2.00 0.188 134,700 140,500 22.5 2.00 0.203 140,500 149,600 24.5

SLIDE 7

Burst Testing

Diameter (in) Wall Thickness (in) Length (in) Estimated Burst (psi) Actual Burst (psi) 2.000 0.134 96.00 18,860 21,437 2.000 0.134 96.00 20,233 2.000 0.156 96.00 22,620 25,431 2.000 0.156 96.00 24,273 2.000 0.188 96.00 27,377 32,297 2.000 0.188 96.00 32,542

Estimated burst = Barlow’s formula using actual tensile strength No actual burst failures in the weld seam

SLIDE 8

Collapse Testing

Diameter (in) Wall Thickness (in) Calculated Ovality (%) Estimated Collapse (psi) Actual Collapse (psi) 2.000 0.134 0.650 11,200 16,790 2.000 0.134 0.400 11,900 16,641 2.000 0.156 0.299 17,500 22,008 2.000 0.156 0.150 18,600 22,338 2.000 0.188 0.399 22,100 28,923 2.000 0.188 0.448 21,800 28,937

Estimated collapse = API 5C3 using actual wall and zero axial load

SLIDE 9

Function Testing

Tubing has been successfully shear tested

– By Texas Oil Tools – Also by multiple customers

Tubing is currently being tested for behavior

in injectors

– By HydraRig – By Customer

SLIDE 10

Fatigue Performance Evaluation

Fatigue testing on Standard Fatigue test

Machine

– In excess of 350 samples tested over 72” radius – 36 samples tested over 48” radius

Standard set of ASTM E606 strain controlled

fatigue tests

Used to develop algorithm for Flexor and

Cerberus models

SLIDE 11

Fatigue Performance

200 400 600 800 1000 1200 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000

0.203

0.188 0.175 0.156 0.134 Wall Thickness (in)

Source: Cerberus

SLIDE 12

Fatigue Comparison to QT-1000

Source: Cerberus

100 200 300 400 500 600 700 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000

2.0 x 0.203 High strength

2.0 x 0.203 QT-1000 2.0 x 0.134 High strength 2.0 x 0.134 QT-1000

SLIDE 13

High Strength versus QT-1000 Diametrical Growth for 2.000" x 0.156"

0.05 0.1 0.15 0.2 0.25 0.3 2000 4000 6000 8000 10000 12000 Diametrical Growth (in) Internal Test Pressure (psi) QT-1000 High Strength

For 300 Cycles For 45 Cycles

SLIDE 14

Overpull Comparison of QT-1000 to High Strength

20,000
10,000

10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 5,000 10,000 15,000 20,000 25,000 30,000 35,000 Overpull (lbs) String Depth (feet) QT-1000 1.750 True-Taper High Strength 1.750 True-Taper

High Strength 1.750" Diameter String 0.203 10,000 ft 0.203 - 0.188 700 ft 0.188 2,000 ft 0.188 - 0.175 700 ft 0.175 4,000 ft 0.175 - 0.156 1,600 ft 0.156 6,000 ft 0.156 - 0.134 2,000 ft 0.134 4,000 ft Total 31,000 ft

Axial Overload

QT-1000

SLIDE 15

Internal Yield Pressure Comparison of QT-1000 and High Strength

5000 10000 15000 20000 25000 30000 35000 5,000 10,000 15,000 20,000 25,000 30,000 35,000 Internal Pressure (PSI) String Length (feet) QT-1000 1.750 True-Taper High Strength 1.750 True-Taper

1.750" Diameter String 0.203 10,000 ft 0.203 - 0.188 700 ft 0.188 2,000 ft 0.188 - 0.175 700 ft 0.175 4,000 ft 0.175 - 0.156 1,600 ft 0.156 6,000 ft 0.156 - 0.134 2,000 ft 0.134 4,000 ft Total 31,000 ft QT-1000 High Strength

SLIDE 16

Next Development Goals

Further develop the Bias Welding process to

capture a higher percentage of the parent material’s strength

Additional fatigue and mechanical properties

testing to verify product performance in additional sizes

Fully develop a tube-to-tube welding procedure

for the manufactured tubing

SLIDE 17