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      You are  >> All >> Cementing Tools >> Casing Scraper >> Casing Scraper
 
  

 
  The Casing Scraper is used to clean cement, mud, embedded bullets, rust, mill scale, paraffin, perforation burrs and other substances from the inside walls of casing. Maintaining a clean casing I.D. is important to the operation of all tools used in drilling the well. Likewise, packers and similar tools must have a clean surface to grip. Foreign materials on casing walls will frequently cause these tools to become difficult to operation.
  The Casing Scraper is manufactured from a solid piece of heat treated steel. The scraper blades fit into machined recesses and are securely held by a dovetail keeper and spacer. The scraper blades feature left hand helical grooves and are hard faced for maximum service. There are sufficient blades in the body to completely scrape the casing surface without rotating the tool.
  Standard connections on the Casing Scraper are API Reg., Box and Pin. This allows the scraper to be installed in the drilling string between the bit and the bit sub. The bit is run below the scraper to serve as a guide and prevent plugging the circulation hole through the scraper.
  Lake Petroleum's Casing Scrapers include common type and special type.

Technical Specification for common Scapers:


Type

Casing Size
(mm/inch)

Connection
(mm/inch)

Body O.D.
(mm/inch)

Length
(mm/inch)

Body I.D.
(mm/inch)

Quantity of Blades
(mm/inch)

GW01

4-1/2(114.3)

2-3/8REG

3-5/8(91)

38-1/4(971.2)

3/4(19)

23

GW02

5(127)

NC26

3-5/7(94)

38-1/4(971.2)

3/4(19)

23

GW03

5-1/2(139.7)

NC31

3-5/16(110)

44-5/16(1100)

1(25.4)

23

GW04

6-5/8(168)

3-1/2REG

4-7/64(130)

44-5/16(1100)

1(25.4)

23

GW05

7(177.8)

3-1/2REG

5-3/8(136)

44-5/16(1100)

1-13/16(30.2)

23

GW06

9-5/8(244.5)

4-1/2REG

8(1203)

52(1320)

2-1/4(57.2)

25

GW07

10-3/4(273)

6-5/8REG

9(228)

59(1500)

2-1/4(57.2)

25

GW08

13-3/8(339.7)

6-5/8REG

11-1/4(286)

59(1500)

2-13/16(71.4)

27

Specification of special Scrapers:


Casing Size
inch

dw

d2

d
mm

d
mm

Length
mm

Connection
API

Quantity of Blades

4-1/2"

92121

92

80

20

972

2-3/8 REG

23

5"

95118

94

80

20

972

NC 26

23

5-1/2"

110133

110

100

25

1100

NC 31

23

6-5/8"

136162

136

108

30

1100

3-1/2 REG

23

7"

142168

136

108

30

1100

3-1/2 REG

23

9-5/8"

209235

203

146

57

1320

4-1/2 REG

25

10-3/4"

240260

228

196

57

1727

6-5/8 REG

25

13-3/8"

290330

286

196

71

1500

6-5/8 REG

27

 
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