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Symmetric Overburden Drilling Equipment

Symmetric Overburden DrillingEquipment

Symmetric Casing Drilling System is designed to drill holes of many sizes, ranging from 108 to 863mm (4 1/4 to 34 in), at any angle (including horizontal), to any depth (beyond 100 meters) through unconsolidated formations simultaneously with casing. The internal flushing grooves together with the built-in casing shoes gives a good seal to the button of the drilling hole, and thus minimizing the disruption of the surrounding of the drill hole. It makes the casing follow easy and the equipment and operation simple, and is recommended to a multitude of applications, such as micro-piling, underpinning, anchoring, marine work and horizontal drilling etc.

Product DescriptionSpecification

Advantages of Symmetric Drilling

Vertical holes can be drilled in all strata, such as gravel, sand and pebble, and drilling speed is fast. This is based on the principle of work.

A smooth and steady drilling may be achieved using ring bit on all conditions and create big hole even if a small drilling rig is used.

When the system needs to be unlocked during drilling, it is easier to unlock than eccentric drilling without opening and closing eccentric components in the hole.

Symmetric drilling can shape the hole at any angle.

The gas used for slag discharge in the center drilling rises along the casing immediately after it is ejected from the guide bit, so the damage to the hole wall is small and the slag discharge effect is good.

Drilling workers are relieved of the need to maintain their continuous and constant attention on drilling process since symmetric drilling can carry on smoothly.

The structure and principle of operation of symmetric drilling system can guarantee considerable reduction in downtime,fewer consumable and lower operation costs.

Drilling steps for core heel pipe

12

the first stepFirst, ring drill and tube boots are welded with sleeves. Then lock the guide head and the ring bit to ensure that the guide bit is engaged with the pipe boots.The impact of the impactor can be spread to the guide bit and the ring bit to start the rock breaking, and driving the casing downward.the second step

34

the third stepCompleted task, the drill is retrieved by a lightly reverse transfer port and unlocked. The ring bit is left in the hole, and when the hole is finished, we can take out it with casing.If you want to continue to drill in bedrock,please replace drill bit with suitable standard bit.the forth step

Specification of Symmetric Overburden Drilling Equipment

Product model

Casing OD(mm)

Casing wall max (mm)

Ring bit OD(mm)

Pilot bte OD(mm)

hammer

Ring bit OD

(mm)

NSOD114

6/10

91/78

128/124

100/92.5

ND35

NSOD127

7

99

140

110

ND35

NSOD140

7/10

116/94

154/150

124/117.5

ND45/NQL4

NSOD168

8/12.7

142/121

182/178

150/140

ND55/NQL5

NSOD178

10

145

195

156

ND55/NQL5

NSOD194

6/12.7

167/148

212/203

180/167

ND65/NQL6

NSOD219

7/12.7

186/167

234

203/191

ND65/NQL6

NSOD273

273

8/12.7

232/219

292

255/246

ND85/NQL8

NSOD325

8/12.7

281/270

342/342

306/297

ND85/NQL8

NSOD406

328

419

374

NSD10/N125

NSOD508

508

15

412

526

470

ND475/SD15

NSOD609

15

513

637

570

ND525/SD18

Anbit Drilling Equipment Co., Ltd. Is a professional oil drilling equipment manufacturers. We mainly provide mobile air compressors, cheap air compressors, crushers, underground water detector. We are your trustworthy partner.



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