Oilfield Downhole Drill Rig Wellhead Tools Drilling Pipe

Product introduction
Great Petro anti-sulfur drill pipe is a special drill pipe independently developed by Great Petro to meet the needs of oil and gas exploration and drilling in areas with sulfur and high sulfur content, which has the stress corrosion resistance of hydrogen sulfide.
Product advantage
On the basis of the first generation of DT-S 95 and DT-S 105 antisulfur drill pipe suitable for use in moderate H2S corrosion environment, by optimizing the chemical composition of materials and heat treatment process, The second generation of DT-SS 75, DT-SS 95 and DT-SS 105 anti-sulfur drill pipe suitable for use in severe H2S corrosion environment has been developed. The performance indexes of the SS series of anti-sulfur drill pipe meet the requirements of IRP1.8, NACE MR0175 and ISO15156 standards.
Product specification
Product size: Covers all API standards from 2-3/8 "to 6-5/8"
Steel grade: DT-S 75, DT-S 95, DT-S 95, DT-S 105

		DT-S 75,	DT-S 95	DT-S 105	DT-SS 75	DT-SS  95	DT-SS 105
drill pipe	yield strength(MPa)	517-654	654-758	723-827	517-654	654-758	723-827
	Tensile Strength(MPa)	654-792	723-896	792-965	654-792	723-896	792-965
	ballistic work(J)3/4size,-20ºC	≥70	≥80	≥80	≥70	≥80	≥80
	Maximum single value of hardness(HRC)	24	27	29	24	27	29
	SSC Test	70%SMYS;Method A;720h			85%SMYS;Method A;720h
connection	yield strength(MPa)	758-861	758-861	758-861	758-861	758-861	758-861
	Tensile Strength(MPa)	861-999	861-999	861-999	861-999	861-999	861-999
	ballistic work(J)3/4size,-20ºC	≥89	≥89	≥89	≥89	≥89	≥89
	Maximum single value of hardness(HRC)	32	32	32	32	32	32
	SSC Test	-	-	-	65%SMYS;Method A;720h

Working principle

This large channel allows fluid to flow freely as the packer is run, recovered, and circulated, greatly reducing cartridge friction and avoiding ball-tooth collisions. The packer can be used in high pressure Wells where a hydraulic anchor can effectively prevent the packer from going up. At the same time, the pressure also acts on the balance piston, which moves down against the center pipe and the seal sleeve. This principle eliminates excess set load and keeps the packer's bypass balance channel closed.

 Characteristics

1, can be safely set in all levels of casing;

2, reliable sealing system, in the operation can withstand the pressure difference up and down;

3, ground control bypass channel and pressure balance valve;

4, balance piston structure to strengthen the stability of the tool under pressure;

5. Automatic J-type device can easily achieve setting and unsealing, and can be set several times after entering the well;

6. Lifting the tubing will first open the bypass valve to balance the pressure, to ensure the safety of unsealing operation;

7, can withstand high pressure, 7 "and below specifications can withstand up to 70MPa (10000psi) pressure difference.

Iv. Specifications and models

The packer is designed for a range of casing sizes from 4 1/2 "to 16" and features a large diameter, pressure-balancing valve that can be controlled at surface.