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ND-J Type Mechanical Internal Cutter
Application:
The ND-J type internal cutter is a down-hole mechanical cutting tool designed to cut casings, tubings and drill pipes.Depending on drilling conditions, it can be used in conjunction with coupling locator to locate the position of the nearest coupling from the cutter. When the internal cutter is used with the releasing spear, it can cut and remove the cut tubing in one fishing operation.
Features:
simple structure, reliable performance and high cutting efficiency.
Working Principle:
Lower the internal cutter to a designated cutting depth, rotate (3 rounds) the cutter mandrel in the clockwise direction to separate the sliding sleeve and the sliding sheet. At this instance, with the spring effect, the friction block will be pressed against the pipe wall. In addition, due to the engagement of the sliding sleeve and sheet, the main center body and the slip portion is pushed upwards along the tapered slip cone, expanding the slip diameter. As the slip diameter expands, it bites on the internal wall of the drill pipe. At this moment, anchor the cutter on the pipe wall and lift the cutter mandrel by 10mm. After which, slowly lower and rotate mandrel, as the cutters (3 pcs) move down the tapered cutter block, it open up radially to cut the pipe wall.
The cutting operation is completed when the mandrel pressed against the end of the thrust ring. Lift the mandrel to release and reposition the cutters via its own weight and the function of the blade spring. As the mandrel is lifted, the sliding sleeve and sheet re-engage back to its original position. In addition, as the tapered slip cone moves upwards, the slip loses its grip on the pipe wall and the cutter releases its anchor on the wall. Continue to lift mandrel until the locating ring engages with the guide nut before pulling the tool out.
When ordering please specify:
●Pipe size and weight to be cut.
●Top connection.
Available model:
ND-J73×55 ND-J89×67 ND-J114×91 ND-J127×102 ND-J127×102 ND-J140×112 ND-J140×112 ND-J178×145 ND-J178×145 ND-J178×145 ND-J245×210
Specifications - Mechanical Internal Cutter
| NO. | Product Name | Model | O.D. (mm) | ConnectionBox | ID (mm) | ID of cut pipe (mm) | OD of cut pipe(in) |
| 1 | MechaNical INterNal Cutter | ND-J73×55 | 55 | 1.9 NU | 8 | 59-62 | 2 7/8 |
| 2 | MechaNical INterNal Cutter | ND-J89×67 | 67 | 1.9 EU | 13 | 70-78 | 3 1/2 |
| 3 | MechaNical INterNal Cutter | ND-J114×91 | 91 | NC26 | 16 | 97-104 | 4 1/2 |
| 4 | MechaNical INterNal Cutter | ND-J127×102 | 102 | NC26 | 18 | 107-115 | 5 |
| 5 | MechaNical INterNal Cutter | ND-J127×102 | 102 | 2 7/8 REG | 18 | 107-115 | 5 |
| 6 | MechaNical INterNal Cutter | ND-J140×112 | 112 | NC31 | 15 | 118-128 | 5 1/2 |
| 7 | MechaNical INterNal Cutter | ND-J140×112 | 112 | 2 7/8 REG | 15 | 118-128 | 5 1/2 |
| 8 | MechaNical INterNal Cutter | ND-J178×145 | 145 | NC38 | 38 | 150-166 | 7 |
| 9 | MechaNical INterNal Cutter | ND-J178×145 | 145 | NC31 | 38 | 150-166 | 7 |
| 10 | MechaNical INterNal Cutter | ND-J178×145 | 145 | 3 1/2 REG | 38 | 150-166 | 7 |
| 11 | MechaNical INterNal Cutter | ND-J245×210 | 210 | NC50 | 50 | 216-228 | 9 5/8 |
