QJ Type Mechanical Drilling Jar
1.Products introduction
QJ type Mechanical Drilling Jar is a kind of mechanical drilling jar for downhole stuck freeing tool in drilling
operation . The drilling jar have both the up and down jarring effects,and can be used in dealing with the drilling
hard trip and sticking accidents.It is a first selected tool for directional well,complicated well and deep well.
2.Features
2.1These jars have a mechanical structure, the slips’s stored energy slippage composes its shock principle.
2.2A special flexible joint can effectively reduce the jar body’s bending stress.
2 .3There is not high pressur e i n t he hydraulic oil reservoir,the oil can be only used as lubrication,the
changing of the oil quanlity won’t affect the shock effects.
2.4The jarring force should be adjusted on surface,the force will keep still,so we can get a constant shock force.
2.5Reasonable structure,advanced manfacturing process can make our jar reliable.
2.6The outside cylinder of the jar are connected with taper thread,that can be easily operated.
Type |
O.D.
mm(in) |
I.D.
mm(in) |
Connectinon |
Max. Upward
jarring Force
kN |
Max.
Downward
jarring Force
kN |
Max.
Working
load
kN(tb) |
Max.working
Torgue
kN.m(ft.tbs) |
OAL
mm(in) |
| QJ121 |
121
(4-3/4) |
50.8(2) |
NC38 |
450
(10/250) |
250
(56000) |
1100
(247000) |
15
(11000) |
6350(250) |
| QJ165 |
165
(6-1/2) |
57.2
(2-1/4) |
NC50 |
650
(145000) |
350
(78000) |
2000
(450000) |
25
(18000) |
7265(286) |
| QJ178 |
178(7) |
71.4
(2-13/16) |
NC50 |
700
(160000) |
400
(90000) |
2400
(540000) |
30
(22000) |
7265(286) |
| QJ203 |
203(8) |
71.4
(2-13/16) |
6 5/8 REG |
820
(184500) |
480
(102222) |
2800
(630000) |
35
(25800) |
7062(278) |
| QJ229 |
229(9) |
76.2(3) |
7 5/8 REG |
1000
(225000) |
500
(112000) |
3000
(670000) |
35
(25800) |
7062(278) |
3.Our service
Test center:
Wet chemical analysis laboratory.
Automatic polishing machine: using for grinding, polishing samples before metallographic analysis.
Metallographic microscope: using to identify and analyze the metal interior structure.
Infrared carbon and sulfur analyzer: using to analyze the carbon sulfur content in the metal .
Hardness tester (Vickers-hardness, Brinell-hardness, Rockwell-hardness , Shore-hardness).
Mudanjiang Xinbeifang Petroleum Drilling Tool Co., Ltd. adheres to innovation and development, focuses on quality, creates the brand and supplies integrity service and sincere cooperation. We will continue to provide customers with the best quality products and services!
Mudanjiang Xinbeifang Petroleum Drilling Tool Co., Ltd.
Basic Information
Business Type:
Main Products:Drill String Tool,Directional Drilling Tool,Blowout Prevention Tool
Location:
Total Employees: 220
Year Established: 2003
Trade Information
Top 3 Markets:
Accepted Payment Currency:
Nearest Port:
Average Lead Time:
Overseas Office: No
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