| Customization: | Available |
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| Customized: | Customized |
| Certification: | ISO, API |
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Mechanical External Cutter
The ND-J type internal cutter is a down-hole mechanical cutting tool designed to cut casings, tubings and drill pipes. The main advantages are its simple structure, reliable performance and high cutting efficiency. In order not to cut the casing and tubing couplings, the cutter shall be kept away from these couplings during operation. 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. Alternatively, a separate fishing tool can be used to remove cut pieces.
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:
| 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 | 1.9 NU | 8 | 59-62 | 2 7/8 |
| ND-J89×67 | X04-89000 | 67 | 1.9 EU | 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 7/8 REG | |||||
ND-J140×112 |
X04-140000 | 112 |
NC31 | 15 |
118-128 |
5 1/2 |
| X04-140100 | 2 7/8 REG | |||||
ND-J178×145 |
X04-178000 | 145 |
NC38 | 38 |
150-166 |
7 |
| X04-178100 | NC31 | |||||
| X04-178200 | 3 1/2 REG | |||||
| ND-J245×210 | X04-245000 | 210 | NC50 | 50 | 216-228 | 9 5/8 |
Established in 1973 as a state-owned Mudanjiang Petroleum Machinery Factory. After 50 years a new private company(Tianhe) was registered and established in 2006. At present, Tianhe Group has 5 sales companies, including Chengdu, Beijing, Shanghai, Yanan, Mudanjiang branches. 2 large factories, in cluding Mudanjiang and Shanghai factory, controlling the important sales territories in China. The company is also actively expanding its business overseas. Currently, more than 50 countries and regions around the world, as well as over 200 well-known oil companies and service company customers, are using products under the Tianhe brand. Tianhe has become one of the most popular Asian oil brands.
1.The company has over 50 years of professional production experience and is capable of independently manufacturing a complete range of downhole tools, including: drill pipes, drill collars, stabilizers, jars, fishing tools, etc.
2. We have a strict quality control system, conducting strict quality checks from raw materials to finished products.
3.The company has obtained ISO9001 quality system certification and holds API certificates such as 5CT, 5DP, 7-1, Q1, etc.
4.The minimum order quantity is 1, and the delivery cycle can be strictly controlled.
5.Our export products have been recognized by customers in more than 50 countries and regions.
1.Q:Are you a factory or trading company?
We are a factory and the Top 3 of oildrilling equipment manufacturer.
2.Q:Where is your factory located?
We locate in Heilongjiang Province, China.
3. Q:What do your factory do regarding quality control?
From material to products, we inspect each process to keep good quality.
And SGS inspection can be accepted.
4.Q:How about MOQ ?
We have stock of common sizes at hand, so even few ton is accepted.
5.Q:How about payment ?
Both T/T and L/C can be accepted.
6.Q: How long does your warranty?
We can assured the quality within 90 days after receiving the cargoes.
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