High Quality API Certified Downhole Equipment Mechanical Drilling Jar for Jarring Operation

• Customization: Available
• Customized: Customized
• Certification: ISO, API
• Model NO.: Mechanical Drilling Jar
• Transport Package: Wooden Box
• Specification: NC26
• Trademark: Tianhe
• Origin: China
• HS Code: 8431431000
• Production Capacity: 50000PC/Year

Product Description

Product Description

QJZ Mechanical Drilling Jar
QJZ mechanical drilling jar is fully mechanically operated and is an integrated unit that provides both up and down jarring operation. As part of the drill stem, it is used to free drill string components from sticking incidents and increase drilling efficiency by providing instantaneous jarring action without delay. The mechanical drilling jar relies on a trip and friction sleeve to activate jarring action. The jar is designed to trigger the jarring action when a sufficient amount of force (jar trip load) is applied to the jar in either up or down direction.

Working principle

• Up Jarring

Up Jarring is achieved by pulling the drill string until it reaches the jar trip  load. The jar trip load will cause the internal spring unit to deform, allowing  the trip sleeve to engage the friction sleeve. When this happens, the mandrel is suddenly freed to release the jarring force. To reset the jar, remove the pull load by lowering the drill string.
 

• Down Jarring

There is another set of internal spring sleeve located at the top of the slips. Down Jarring is achieved by lowering(pushing) the drill string until it reaches the jar trip load. The jar trip load will cause the internal spring unit to deform, allowing the trip sleeve to engage the friction sleeve. When this happens, the mandrel is suddenly freed to release the jarring force. To reset the jar, remove the downward load by pulling the drill string.

Product Parameters

Specification-QJZ mechanical drilling jar

Model	QJZ95	QJZ108	QJZ121	QJZ159	QJZ165	QJZ178	QJZ203	QJZ229
Product Code	1603000	1605000	1608000	1610000	1611000	1613000	1615000	1616000
O.D. (mm)	95	108	121	159	165	178	203	229
I.D. (mm)	28	38	51	57	57	57	71.4	76.2
Total Length (mm)	6000	6000	6000	6970	6970	6468	7310	7820
Upper Stroke (mm)	200	200	200	142	142	149	145	203
Lower Stroke (mm)	200	200	200	172	172	168	178	203
Max.Up Jarring Force (kN)	200	300	430	620	620	700	800	800
Max.Down Jarring Force (kN)	100	150	300	360	360	420	450	450
Max.Tension Load (kN)	600	800	1400	2200	2200	2200	2500	3000
Max.Work Torque (kN.m)	4	8	10	15	15	15	20	25
Connection	NC26	NC31	NC38	NC46	NC50	NC50	6 5/8 Reg	7 5/8 Reg
Flexion Connection Length (mm)	3398	3370	3347	3456	3456	3476	3048	2580
Pumping Area (cm2)	33	44	50	100	100	133	176	193
Weight (kg)	360	432	573	1150	1240	1350	1780	2375

Detailed Photos

Photos-QJZ mechanical drilling jar

Certifications

Packaging & Shipping

Company Profile

 Established in 1973 as a state-owned Mudanjiang Petroleum Machinery Factory. After 50 years a new private company(Tianhe) was registered and established in 2006.   At present, Tianhe Group has 5 sales companies, including Chengdu, Beijing, Shanghai, Yanan, Mudanjiang branches. 2 large factories, in cluding Mudanjiang and Shanghai factory, controlling the important sales territories in China. The company is also actively expanding its business overseas. Currently, more than 50 countries and regions around the world, as well as over 200 well-known oil companies and service company customers, are using products under the Tianhe brand. Tianhe has become one of the most popular Asian oil brands.

Our Advantages

1.The company has over 50 years of professional production experience and is capable of independently manufacturing a complete range of downhole tools, including: drill pipes, drill collars, stabilizers, jars, fishing tools, etc.

2. We have a strict quality control system, conducting strict quality checks from raw materials to finished products.

3.The company has obtained ISO9001 quality system certification and holds API certificates such as 5CT, 5DP, 7-1, Q1, etc.

4.The minimum order quantity is 1, and the delivery cycle can be strictly controlled.

5.Our export products have been recognized by customers in more than 50 countries and regions.

FAQ

1.Q:Are you a factory or trading company?
We are a factory and the Top 3 of oildrilling equipment manufacturer.

2.Q:Where is your factory located? 
We locate in Heilongjiang Province, China.

3. Q:What do your factory do regarding quality control?
From material to products, we inspect each process to keep good quality.
And SGS inspection can be accepted.

4.Q:How about MOQ ?
We have stock of common sizes at hand, so even few ton is accepted.

5.Q:How about payment ?
Both T/T and L/C can be accepted.

6.Q: How long does your warranty?
We can assured the quality within 90 days after receiving the cargoes.