Drilling Tools
Shock absorber for drill string

     

    The shock absorber is an important downhole tool in drilling operation.It utilizes absorbing fitting to absorb and decrease the strcke load.shock load and torque load in drilling so as to protect the bit and BHA.decrease drill cost and increase drilling efficiency.BPMF mainly produces Hydraulic Shock Absorber.Bi-directional Shock Absorber and Mechanical Shock Absorber.Which have the following characters.

    The Hydraulic Shock Absorber is used to decrease and absorb the stroke load and shock load by hydraulic spring in order to protect the bit and the drill string.

    The Bi-directional Shock Absorber adds screw stucture compared with the Hydroulic Stock Absorber.So it can decrease and absorb not only longitudinal direction shock and impact of drilling string but also radial torsion shock and impact.Using this shock tool will realize the best adaptation of drilling pressure and totation speed in the operation of drilling or coring.

    The Mechanical Shock Absorber absorbs the shock load by stretch unit made of disc spring.It characters simple structures and stable performance.especially it can work in high temperature strata.

    The Air Shock Absorber is a kind of shock eliminator tool.which cooperates with the rollor bit and abrasive core bit while drilling.It can absorb and reduce the longitudinal shock and impulsive load during course.Thus it is able to keep the nomal drilling pressure.extend the useful life of drilling bit.protect the BHA and ground equipmnet.reduce the drilling cost and enhance the drilling efficiency.The Air Shock Absorber is different from the Hydraulic Shock Absorber that uses the silicon oil as medium.It adopts the disc spring as spring part and working condition cannot influence its operating characteristic.This Air Shock Absorber is a new kind of product designed on the base of researching the special working condition of air drlling.which characters in simple stuctures.stable operating.convenience maintenance.better shock absorb and long life.especially it adapts to the air drilling.

Description of type of shock absorber for drill string

Name

Type

 

Nominal outer diameter

(mm)

Nozzle diameter

(mm)

Length

(m)

Connecting thread

Maximum working pressure

(KN)

Maximum working tension

(KN)

Maximum working torque

(KN·m)

Elastic stiffness

(KN/mm)

Double-acting shock absorber

JZ-YS159-I

159

45

4.8

4 IF

300

1500

15

3.5~5.0

JZ-YS165-I

165

45

4.8

4 IF

300

1500

15

3.5~5.0

JZ-YS178-I

178

50

5.2

4 1/2 IF

350

1500

15

3.5~5.0

JZ-YS203-I

203

64

5.1

6 5/8 REG

480

2000

20

4.0~5.5

JZ-YS229-II

229

70

4.8

7 5/8 REG

540

2000

20

4.0~6.5

Hydraulic shock absorber

JZ-Y121

121

38

3.8

3 1/2 IF

250

1000

10

3.0~3.5

JZ-Y159-I

159

45

4.2

4 IF

300

1500

15

3.5~5.0

JZ-Y165-I

165

45

4.2

4 IF

300

1500

15

3.5~5.0

JZ-Y178-I

178

50

3.8

4 1/2 IF

350

1500

15

3.5~5.0

JZ-Y203

203

64

4.5

6 5/8 REG

480

2000

20

4.0~5.5

JZ-Y229

229

70

3.9

7 5/8 REG

540

2000

20

4.0~6.5

Mechanical shock absorber

JZ-H159-I

159

45

3.0

4 IF

300

1500

15

3.5~5.0

JZ-H165-I

165

45

3.0

4 IF

300

1500

15

3.5~5.0

JZ-H178-I

178

50

3.0

4 1/2 IF

350

1500

15

3.5~5.0

JZ-H203-I

203

64

3.0

6 5/8 REG

480

2000

20

4.0~5.5

JZ-H229

229

70

3.5

7 5/8 REG

540

2000

20

4.0~6.5

JZ-H279

279

80

4.5

8 5/8 REG

700

2500

25

5.0~7.5

 

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