High Quality API Spec 7-1 Qjz Type Full Mechanical Drilling Jar

• Customization: Available
• Standard: API
• Usage: Oil Mining, Well Drilling
• Model NO.: QJZ Type Full Mechanical Drilling Jar
• Material: Alloy
• Operation Pressure: Atmospheric Pressure
• Surface Treatment: Spray-Paint
• Product Name: Qjz Type Full Mechanical Drilling Jar
• Others: See The Product Description
• Transport Package: Standard
• Specification: O. D 95mm-229mm
• Trademark: Tianhe
• Origin: China
• HS Code: 8431431000
• Production Capacity: 50000

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

Specifications - 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

 Detail Photoes- QJZ mechanical drilling jar

Certifications

Packaging & Shipping

Company Profile

Tianhe Oil Group is an integrated corporation engaged in petroleum equipment design, manufacture, sale, rental, and maintenance, oil engineering services and oilfield exploration and development.Tianhe Oil Group has 5 business scopes throughout 50 countries and regions as follows:

1. Drilling Tools Scope :

The first scope supports the design, manufacture, sale, rental and maintenance of drilling tools such as drill pipe, heavy weight drill pipe, drill collar, kelly, stabilizers, downhole motors, jars, absorbers, fishing tools, milling tools and valves etc.
 

       2.Rigs and Offshore Services Scope :
 

This division supports the design, manufacture, sale, rental, maintenance and other engineering services for skid-
mounted rigs, mobile drilling rigs, workover rigs, offshore drilling platforms and platform cranes etc.
 

      3.Oilfield Engineering Services Scope:
 

This division provides an integrated oilfield engineering support for drilling engineering services, downhole operation services, logging services, directional drilling services, cooperative cementing services and cooperative well completion services etc.
 

      4.Oilfield Exploration and Development Scope :
 

This scope sources, acquires and manages oilfield exploration and development projects, via wholly owned, joint ventures or profit sharing company.
 

      5.Processing Trade with Provided Materials Scope:

Taking advantage of the geographical logistics of Shanghai Free Trade Zone and Yangshan Port, Shanghai Tianhe undertakes processing on giving materials or samples, seeking the common development of diversified forms such as cooperation or joint venture, both domestically and internationally.
Over the years, Tianhe Oil Group, regarding "people-oriented, technology first, continuous improvement, casting brand" as our management guidance, continuously strives to innovate and improve our products and expand business related to oilfield. Meanwhile, The company also increases investment in technology research and development, always takes providing the global customers with the best technical products and services as our company's mission.
Tianhe Oil Group strongly believes and promotes Total Quality Management, implement the ISO quality management system and HSE management system and API Standard, which has been deeply implanted into every person's thought and carried out into every aspect of work.
Our manufacturing facilities are well equipped with four automated induction heat treatment lines and dozens of other types of heat treatment ovens and well furnaces to ensure full coverage of heat treatment requirements by different products to achieve the required mechanical properties.
In order to ensure the quality consistency and interchangeability of high precision components, Tianhe has introduced WFL 5-axis Linkage Turning & Milling Machining Center from Austria, Mazak's turn milling machining center from Japan and the Haas vertical machining center from USA. These processes are facilitated with precise quality inspection equipment such as the Brunker OES Metal Analyzers from Germany, Ultrasonic and Magnetic Powder Flaw Detector and high precision Hexagon Three Coordinate Measuring Machine and Farco Portable Three Coordinate Measuring Machine.
So far, Tianhe Oil Group has established strong business relationships with over 200 international oil & gas companies in supporting the top 50 oil producing countries.

 

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.