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DOUBLE PACKERS IZ TYPE (STAR PACKERS) 28 - 170 MM

 

 

Sometimes, it is evident that users fail to select an appropriate type of Packer with respect to given technical data at worksite use such as : working pressure in relation with borehole diameter.

Cement is the most common type of grout used however other types are used such as bentonite, epoxy and other special agents used for waterproofing and greater penetrability etc. Grout may be pumped at low, medium or high pressures also other factors such as fluid used, ground conditions, injection depth will determine the pressure required and the type of grout used.

Deployment of the inflatable packer is simple through the use of drill rods with an appropriate crossover thread to the packer. A wireline or crane may be used in conjunction with a grout hose (instead of rods) however; you are limited to shallow depths, grouting pressures, how self-supportive the hose/ fittings are. Using drill rods or rigid pipe is a slower process but offers support for the running gear, push down force on the packers, support for the inflation tube and in most cases this is the most suitable option. 

Single star packer systems employ one packer and once lowered to the desired depth and inflated grout can then be pumped through the centre of the packer. Grout exits out the bottom with no restriction or through a TAM valve to prevent back flow. Star packer is then retrieved or abandoned down hole, this is completely application specific. earthnails optStraddle packer systems sometimes referred to as a ‘double packer’ are a useful tool suitable for targeting specific zones downhole, high pressure grouting applications and casing installation in medium to deep bores. The zone between two packers is known as the ‘straddle zone’.The straddle zone is typically 1m in length ranging up to 6m, however all lengths may be manufactured for specific applications or on request.
 

 

double packer

Name

Outer

Diameter

OD

mm

Length

L

mm

Innes

Diameter

ID

mm

Top

Connection

TC

inch

Injection

Zone

IZ

mm

Nozzle

A

inch

Weigtht

kg

34

34-55

300

8

3/8"

340

2x1/8

2,6

34

34-55

500

8

3/8"

500

2x1/8

3,2

44

44-98

300

17

3/4"

350

2x1/8

5,0

44

44-98

500

17

3/4"

500

2x1/8

6,5

44

44-98

1000

17

3/4"

1000

2x1/8

9,5

54

54-115

500

23

1"

500

2x1/8

11,5

54

54-115

500

23

1"

1000

2x1/8

12,5

54

54-115

1000

23

1"

1000

2x1/8

15,0

               
               

74

74-160

500

30

1"

500

2x1/8

16,0

74

74-160

500

30

1"

1000

2x1/8

18,0

74

74-160

1000

30

1"

1000

2x1/8

23,0

               
               

84

84-185

500

30

1"

500

2x1/8

23,0

84

84-185

500

30

1"

1000

2x1/8

24,8

84

84-185

1000

30

1"

1000

2x1/8

26,5

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