API 5CT P110 Pipe

P110 pipes shall be heat treated with full-body, full-length, as per API 5CT 10th edition quenched and tempered (simplified with Q) shall be adopted to the products. Normalized (N) or normalized and tempered (N&T) is not applicable for P110 casing and tubing.Special chemical requirements for ERW P110 pipe are specified in Table E.4 in API 5CT, and other requirements specified in A.6 SR11.

P110 Casing is installed downhole to provide structural integrity to the wellbore and must withstand external-collapse pressure from rock formations and internal-yield pressure from fluid and gas. It needs to bear its own weight and withstand the torque and transaxial pressure placed on it while running downhole. Casing is considered as a pipe pile that will stabilize the oil well.

Reference Inspection for P110 Casing and Tubing
Visual inspection for pipe surface
Dimension check
NDT test including Magnetic particle, Ultrasonic Test, Hydrostatic Test
Drift test
Chemical analysis
Mechanical test on tensile strength, yield strength and elongation
Charpy impact test
Flattening tests
Hardness test
Thread ends check with thread gauge and coupling check

API 5CT Gr. P110 Tubing Chemical Composition

Group	Grade	Type	C		Mn		Mo		Cr		Ni max.	Cu max.	P max.	S max.	Si max.
			min.	max.	min.	max.	min.	max.	min.	max.
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
1	H40	-	-	-	-	-	-	-	-	-	-	-	0.03	0.03	-
	J55	-	-	-	-	-	-	-	-	-	-	-	0.03	0.03	-
	K55	-	-	-	-	-	-	-	-	-	-	-	0.03	0.03	-
	N80	1	-	-	-	-	-	-	-	-	-	-	0.03	0.03	-
	N80	Q	-	-	-	-	-	-	-	-	-	-	0.03	0.03	-
	R95	-	-	0.45 c	-	1.9	-	-	-	-	-	-	0.03	0.03	0.45
2	M65	-	-	-	-	-	-	-	-	-	-	-	0.03	0.03	-
	L80	1	-	0.43 a	-	1.9	-	-	-	-	0.25	0.35	0.03	0.03	0.45
	L80	9Cr	-	0.15	0.3	0.6	0.9	1.1	8	10	0.5	0.25	0.02	0.01	1
	L80	13Cr	0.15	0.22	0.25	1	-	-	12	14	0.5	0.25	0.02	0.01	1
	C90	1	-	0.35	-	1.2	0.25 b	0.85	-	1.5	0.99	-	0.02	0.01	-
	T95	1	-	0.35	-	1.2	0.25 d	0.85	0.4	1.5	0.99	-	0.02	0.01	-
	C110	-	-	0.35	-	1.2	0.25	1	0.4	1.5	0.99	-	0.02	0.005	-
3	P110	e	-	-	-	-	-	-	-	-	-	-	0.030 e	0.030 e	-
4	Q125	1	-	0.35		1.35	-	0.85	-	1.5	0.99	-	0.02	0.01	-
a The carbon content for L80 may be increased up to 0.50 % maximum if the product is oil-quenched.  b The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the wall thickness is less than 17.78 mm.  c The carbon content for R95 may be increased up to 0.55 % maximum if the product is oil-quenched.  d The molybdenum content for T95 Type 1 may be decreased to 0.15 % minimum if the wall thickness is less than 17.78 mm.  e For EW Grade P110, the phosphorus content shall be 0.020 % maximum and the sulfur content 0.010 % maximum.  NL = no limit. Elements shown shall be reported in product analysis.

API 5CT P110 Casing Tubing Features
Any deformation such as crease, hairline, separation, crack or scab is not acceptable on both inner and outer surfaces of the product. All these defects should be completely removed, and the removed depth must not exceed 12.5% of nominal wall thickness.
The surface of thread of coupling and API 5CT P110 Casing Tubing should be smooth without any burr, tear or other defects that may have a negative impact on the strength and close connection.
Deformations which mentioned above are not allowed to appear on the outer surface of API 5CT P110 Casing Tubing coupling.
API 5CT P110 Casing Tubing is offered with a free length range from 8 to 13m on basis of the SY/T6194-96 norm. However, it is also available no less than 6m length and its quantity should be no more than 20%.
It's important for oil and gas operators to protect their production well casings from corrosion with cathodic protection & API 5CT P110 OilField Tubing primarily serves to transfer oil and gases.