KXJ Fishing Bumper Sub

Product Code : KXJ Fishing Bumper Sub

Description

KXJ type bumper jar (hereinafter called as bumper jar )is a mechanical jarring tool . It can make jar repeatedly the stuck drill stem to free from stuck point. When stuck drill stem can not be released by lifting and jarring, the bumper jar can be rotated to make releasable fishing tool to release fish. When used with mechanical internal cutter, it can provide an expected feeding force to the internal cutter so as to cutting steadily. When used with reversing unit , it can compensate the rising stroke for threads after reversing.

Working mechanism

● Energy conversion in jarring operation

Jarring downward is made by means of energy conversion. Raising drill stem shall make bumper jar to be pull down at a certain height to produce potential energy. Go on raising drill stem, the drill stem has a strain energy due to spring strain. When drill stem is lowered suddenly , the energy stored in drill stem force the drill stem to move downward in acceleration.When bumper jar reach a closed position, the above two energies at this instant change into large downward jarring force.

● Main factors having influence on jarring force

The bigger hanging weight on top drill stem of bumper jar makes a bigger jarring force;

The longer the spring extension of drill stem is when raising drill stem, the bigger the jarring force is;

The longer the stroke of the bumper jar is , the bigger the jarring force of jar is .

Specifications - KXJ Fishing Bumper Sub

Parameter/Model	KXJ31B	KXJ34B	KXJ36B	KXJ42B	KXJ44B	KXJ46B	KXJ62B	KXJ64B	KXJ70B	KXJ76B	KXJ80B	KXJ85B	KXJ90B
O.D. (mm)	79	89	95	108	114	121	159	165	178	197	203	219	229
I.D. (mm)	25.4	28	32	38	38	38	51	51	70	70	70	76	76
Sealing pressure (MPa)	20	20	20	20	20	20	20	20	20	20	20	20	20
Max.tensile load (kN)	300	400	500	700	1120	1200	1430	1430	1530	1630	1630	1630	2200
Max.work torque (kN.m)	3	3.5	4	6	7	8	13	13	15	20	20	20	25
Work stroke (mm)	508	508	508	508	1000	1000	1400	1400	1400	1500	1500	508	1500
Connection	NC23	NC26	NC26	NC31	NC31	NC38	NC50	NC50	NC50	6 5/8 REG	6 5/8 REG	6 5/8 REG	7 5/8REG
closed length (mm)	1410	1438	1410	1608	2100	2110	2604	2604	2650	2730	2730	1769	2760
Weight	45kg	50kg	58kg	95kg	130kg	146kg	240kg	285kg	330kg	430kg	455kg	383kg	660KG

KXJ Fishing Bumper Sub

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