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    Your Position:Home>Products>Cutter>Mechanical Internal Cutter
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    Mechanical Internal Cutter

    Product Detail

      QQ截圖20150430084808_副本.jpg

      Mechanical Internal Cutter

      Technical Features

      The ND-J type internal cutter is a down-hole cutting tool designed to cut casings, tubings and drill pipes mechanically. It owns some advantages of simple structure, reliable performance, high cutting efficiency. In order not to cut casings, tubing couplings, before run in hole, the cutter shall be kept away from collar position, if condition is allowed, it can be used with collar finder. It can be used with releasing spear, the cut off pipe strings can be either pulled out of hole with cutter or caught out by fishing tools alone.

      Working principle

      When internal cutter is run in estimated depth down-hole, right to rotate mandrel of cutter for three circles so that sliding sleeve separates off sliding sheet. At the time, the friction block closes against pipe wall due to the function of spring, the parts on centralizing body and slips don't rotate in pace with mandrel but move up due to engagement of sliding sleeve and sliding sheet, also at the time, down the drill string the slip diameter is expanded due to sloping function of slip cone-shaped body, the slip bites the inner wall of pipe, then cutter is anchor bolted on pipe wall. In this case, lift up mandrel about 10mm, then lower and rotate mandrel slowly, so that three cutters radial open up depending on cutter push block, cutting operation can be done. The cutting operation is not finished until mandrel press against end Face of thrust ring. When lift up mandrel, under double functions of blade spring and its self-weight, three cutters separate off inclined Face and take back blade edges, additionally, sliding sleeve and slip sheet come back to original engagement depending on slip sheet spring and structure of tooth threads. Meanwhile, the slip cone moves up in pace with mandrel so that slip looses cutting tools bolted on pipe wall and continues to move up until upper cone-shaped face of guide nut with draw against tooth face of locking ring before pull out of tools cut.

      When ordering please specify:

      ● Pipe size and weight to be cut.

      ● top connection.

      Technical parameters

      Model

      Product Code

      O.D.

      (mm)

      Connection

      BOX

      ID

      (mm)

      ID of cut pipe

      (mm)

      OD of cut pipe

      (in)

      ND-J73×55

      X04-73000

      55

      1.9NU

      8

      59-62

      2 7/8

      ND-J89×67

      X04-89000

      67

      1.9EU

      13

      70-78

      3 1/2

      ND-J114×91

      X04-114000

      91

      NC26

      16

      97-104

      4 1/2

      ND-J127×102

      X04-127000

      102

      NC26

      18

      107-115

      5

      X04-127100

      2 7/8REG

      ND-J140×112

      X04-140000

      112

      NC31

      15

      118-128

      5 1/2

      X04-140100

      2 7/8REG

      ND-J178×145

      X04-178000

      145

      NC38

      38

      150-166

      7

      X04-178100

      NC31

      X04-178200

      3 1/2REG

      ND-J245×210

      X04-245000

      210

      NC50

      50

      216-228

      9 5/8

       

       

    Shaanxi BRJ Petroleum Machinery Equipment Co.,Ltd
    Add: Room 2-1014,3rd building,Deyi international center,No.6 Changqing 2nd road,
    Economic and technological development zone,Xi'an,china
    Tel/Fax: 0086-29-89612241   Email: Sales@brj-oiltools.com  http://www.tofa3ghtds.com  
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