Techcore Oil Tools Co.,Ltd,
Professional Provider & Manufacture of DST tools, Coiled Tubing Tools & Wireline Tools
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Cased Hole Big John Jar For Drill Stem Testing High Pressure Hydraulic Jar
The Big John Jar is a kind of hydraulic jar which is Halliburton type. The Big John Jar is used as a safety tool in the well downhole testing operation and TCP operation. The Big John Jar helps free a stuck tool or tool string by resisting a pull on the workstring, when the workstring is stretched by the pull, tension in the jar is released and an upward impact is delivered to the stuck tool. The pulling strength of 5” Hydraulic Jar is 222.2kN.
Features of Hydraulic Jar
* The Big John Jar is designed with the hydraulic system, which is made it esay to operate.
* During the operation, the Big John jar reduce the rig time.
* The big john jar can be recoked rapidly.
* The jar time delay is adjustable.
Technical parameter of Hydraulic Jar
| No | Specification | 5” |
| 1 | O.D. | 127.5mm |
| 2 | Bore Diameter | 57mm |
| 3 | Length | 1695mm |
| 4 | Working pressure | 105Mpa |
| 5 | Internal pressure strength | 149Mpa |
| 6 | External pressure strength | 138Mpa |
| 7 | Tensile strength | 1406KN |
| 8 | Torque strength | 22KN.m |
| 9 | Service | H2S,NACE MR0175(>175oF) |
| 10 | Working temperature | -29oC+204oC |
| 11 | Connection thread | 3 7/8CAS. BXP or 3 1/2 IF.BXP |
Advantage of Techcore Oil Tools
Techcore Oil Tools expertise in manufacture of the Drill Stem Testing Tools for more than Ten years, the professional Reserch and Development (R&D) department improves the advanced technology in design of the Drill stem testing tools for well testing service.
Techcore designs and chooses the raw material of DST tools according to the customers' oil well condition, and make all our effort to supply the cost effective well testing tools to satisfy the customer, and improve the test tools to meet the industry’s demand for ultra-high pressure and temperature downhole operation.
Product Scope
RTTS Serires: Full bore retrievable packer, full bore retrievable circulating valve, full bore retrievable safety joint,
Tester Valve: downhole tester valve, select tester valve, LPR- N Valve, Tubing String Tester Valve
Circulating valve: omni valve, multi-cycle circulating valve, RD Circulating valve, RD safety Circulating Valve, Hydraulic Circulating Valve
Other DST string tools: hydraulic jar, vertical shock absorber, radial shock absorber, RD safety circulating valve, high pressure retrievable packer with bypass, CHAMP packer, IPO valve, sleeve type drain valve, rupture disk sampler, super safety valve with control panel, BOP safety valve for downhole operation and so on.