Oilfield API Double-Acting Fully Hydraulic Drilling Jar for Drilling Operation

• Customization: Available
• After-sales Service: Yes
• Warranty: 1year
• Model NO.: QYZ121
• Manufacturing Process: Casting
• Surface Treatment: Galvanized
• Operation Pressure: Atmospheric Pressure
• Material: Alloy
• Transport Package: Wooden Case
• Specification: 114
• Trademark: zx
• Origin: China
• Production Capacity: 200

Product Description

Oilfield API Double-Acting Fully Hydraulic Drilling Jar for Drilling Operation

Product Description

QYZ hydraulic drilling jar integrates upward jarring with downward jarring. It is a hydraulic type drilling jar, which is used in all kirds of well condition, it generates up and down jarring force by lifting and releasing drill stems when the drilling tools were stuck and make sure drilling operation can go smoothly. This type drilling jar has some advantages like easy operation, stable property, safety and reliability maintenance etc.

Working principle

*Up Jarring
Lower the drill stem to ensure that drilling jar is closed completely (in locking position). Up jarring is achieved by slowly increasing the lifting force on the drill stem, until there is sufficient pull force to overcome the spring resistance and initial hydraulic time delay. During the time delay, the overpull at surface can  be adjusted to vary the desired impact force. When the mandrel reaches the trigger position, there is a sudden release in resistance, the elastic potential energy stored within the drill string will be transmitted to forward up jarring impact energy. After impact, apply a downward force sufficient to close jar in locking position, then repeat the jarring cycle as required.

*Down Jarring
Lift and lower the drill stem to ensure that the drilling jar is closed completely (in locking position). Down Jarring is achieved by applying sufficient downward force to compress the spring and store elastic potential energy. When the pressure of the jar is greater than the desired unlocking force, the grapple will slide away from the mandrel to release the locking, performing down jarring action.  Repeat the procedures to produce continuous down jarring action.

 

Product Parameters

Normal Size mm(in)	ID d/mm	Connection API	O. D. of Drill Pipe mm(in)	O. D of End Elevate (mm)
73.0(2-7/8)	31.8	NC23	79.4(3-1/8)	111.1
	44.5	NC26	88.9(3-1/2)
88.9	54	NC31	104.8(4-1/8)	127
	50.8	NC35	120.7(4-3/4)
(3-1/2)	68.3	NC38	127.0(5)
127.0(5)	71.4	NC44	152.4(6)	168.3
			158.9(6-1/4)
		NC46	158.9(6-1/4)
	82.6		165.1(6-1/2)
			171.5(6-3/4)
		NC50	177.8(7)
			184.2(7-1/4)
		NC56	196.8(7-3/4)
			203.2(8)
	95.3	6-5/8REG	209.6(8-1/4)
		NC61	228.6(9)
		7-5/8REG	241.3(9-1/2)
		NC70	247.7(9-3/4)
			254.0(10)
		NC77	279.4(11)

Packaging & Shipping

Company Profile

Dongying Zhaoxin Industry and Trade Co.,Ltd is an ISO-9001, ISO-14001, OHSAS-18001 certified company and has all the quality systems in place for design, planning,manufacturing and quality monitoring & traceability to ensure that Dongying Zhaoxin Industry and Trade Co.,Ltd products match the highest quality & reliability Standards similar to any International major in this field.

Dongying Zhaoxin Industry and Trade Co.,Ltd with perfect attitude, product and service, is going to make further development together with customers at home and abroad .