Drilling Jar Intensifiers
Drilling Bumper Subs
105
Unbalanced Drilling Bumper Sub
Series
394
347
348
349
456
376
Nominal Size
inches
3.12
4.25
4.75
6.25
6.50
8.00
(+API Drill Collar Toler.)
(mm)
(79)
(108)
(121)
(159)
(165)
(203)
Max. Recommended
Hole Diameter
inches
6
6 3/4
7 7/8
9 7/8
9 7/8
17 1/2
Hole openers not
(mm)
(152)
(171)
(200)
(251)
(251)
(445)
recommended
ID
inches
1.00
1.94
2.00
2.25
2.25
3.00
(mm)
(25)
(49)
(51)
(57)
(57)
(76)
Length
feet
8.0
9.2
9.7
9.7
19.7
20.4
(m)
(2.4)
(2.8)
(3.0)
(3.0)
(6.0)
(6.2)
Weight
lbs
190
300
410
690
1,550
2,600
(kg)
(86)
(136)
(186)
(313)
(703)
(1 180)
Standard Stroke
inches
18
18
20
20
60
60
(mm)
(457)
(457)
(508)
(508)
(1 520)
(1 520)
Max Tensile Load
lb
142,000
162,000
394,000
577,000
577,000
853,000
(kN)
(630)
(720)
(1 750)
(2 570)
(2 570)
(3 790)
Max Torsional Load
lb-ft
3,500
10,000
14,000
34,000
34,000
66,000
(To Yield Body Conn.)
(Nm)
(4 700)
(14 000)
(19 000)
(46 000)
(46 000) (89 000)
To order: specify O.D., connections, bottom hole temperature.
Specifications subject to change without notice.
Double Acting Drilling Jar Intensifiers
Series
408
434
414
Nominal Size
inches
6.5
8.0
9.5
(+API Drill Collar Tolerance)
(mm)
(165)
(203)
(241)
Max. Recommend Hole Dia.
inches
9 7/8
17 1/2
26
Hole openers not recommended
(mm)
(251)
(445)
(660)
ID
inches
2.25
2.81
3.00
(mm)
(57)
(71)
(76)
Length
ft
20
20
20
(m)
(6.1)
(6.1)
(6.1)
Weight
lbs
1,750
3,000
4,000
(kg)
(790)
(1 360)
(1 810)
Stroke Up
inches
8
8
8
(mm)
(203)
(203)
(203)
Stroke Down
inches
8
8
8
(mm)
(203)
(203)
(203)
Axial Load To Fully Ext.
lb
70,000
84,000
86,000
(kN)
(310)
(370)
(380)
Axial Load To Fully Compress
lb
70,000
84,000
86,000
(kN)
(310)
(370)
(380)
Max Tensile Load
lb
755,000
1,050,000
1,225,000
(kN)
(3 400)
(4 700)
(5 400)
Max Torsional Load
lb-ft
37,000
70,000
117,000
(To Yield Body Connections)
(Nm)
(50 000)
(95 000)
(159 000)
To order: specify O.D., connections, bottom hole temperature.
Specifications subject to change without notice.
DRILLING JAR INTENSIFIER
The Griffith • Vector Drilling Jar Intensifier is designed to ensure
max. jarring efficiency in directional or crooked holes where wall
drag is a problem, or in shallow holes where pipe stretch is insufficient.
The Intensifier is positioned in the bottom hole assembly several drill
collars above the jar. As tension is applied, the Intensifier will extend,
storing the energy of the applied tension. This stored energy
is released when the jar fires, accelerating the drill collars upward.
Drilling Jar Intensifiers
Series
382
387
457
390
451
Nominal Size
inches
4.75
6.25
6.50
8.00
9.50
(+API Drill Collar Tolerance)
(mm)
(121)
(159)
(165)
(203)
(241)
Max. Recommend Hole Dia.
inches
7 7/8
9 7/8
9 7/8
17 1/2
26
Hole openers not advise
(mm)
(200)
(251)
(251)
(445)
(660)
ID
inches
1.50
2.25
2.25
2.81
3.00
(mm)
(38)
(57)
(57)
(71)
(76)
Length
ft
13.9
14.7
14.7
14.9
16.2
(m)
(4.2)
(4.5)
(4.5)
(4.5)
(4.9)
Weight
lbs
585
1,100
1,100
1,800
3,500
(kg)
(270)
(500)
(500)
(820)
(1590)
Stroke
inches
7
8
8
8
8
(mm)
(178)
(203)
(203)
(203)
(203)
Axial Load To Fully Ext.Tool
lb
55,000
75,000
75,000
82,000
86,000
(kN)
(240)
(330)
(330)
(360)
(380)
Max Tensile Load
lb
608,000
820,000
820,000
942,000
1,225,000
(kN)
(2 700)
(3 600)
(3 600)
(4 200)
(5 400)
Max Torsional Load
lb-ft
13,600
34,000
34,000
80,000
145,000
(To Yield Body Connection)
(Nm)
(18 000)
(46 000)
(46 000)
(108 000)
(197 000)
Fully sealed and lubricated, the Intensifier will provide dependable
operation in continuous drilling service.
DOUBLE ACTING DRILLING JAR INTENSIFIER
The Double Acting Intensifier operates in a manner similar to the
Intensifier but in both the up and down directions.
DRILLING JAR INTENSIFIER
To order: specify O.D., connections, bottom hole temperature.
Specifications subject to change without notice.
DRILLING BUMPER SUB:
The Griffith • Vector Drilling Bumper sub is designed to be used for
continuous service during fishing, workover, and drilling operations.
The fully sealed and lubricated spline drive is capable of withstanding
high torque loads and sustaining bumping action up or down.
The tool is completely balanced to hydrostatic pressure and is
designed to minimize pump open force ensuring free movement of the
tool.
These bumper subs are available as unbalanced, semi-balanced, or
fully balanced tools. The unbalanced tool will be pumped open by the
differential pressure across the tool acting over the effective pump open
area. Semi-balanced and fully balanced tools incorporate additional
chambers to create a closing force in the tools. The amount of closing
force is controlled by the effective area in chamber to create the net
required effect.
Fully balanced bumper subs have been used as motion compensation,
and unbalanced and semi-balanced bumpers have had applications as
thrusters.
• UNBALANCED
• SEMI-BALANCED
• FULLY BALANCED
