The tool joints are made of aisi 4145h premium alloy steel fully q&t with the ipsen furnace .
All the joints are inspected by florescence magnetic particle and the ultrasonic method. The pipe body goes under very serious inspection in conformance with api 5d.
The welding between the drill pipe an tool joint is accomplished with the friction welding machine, the welding process is swift & steady under computer control.
The weld zone is quenched and tempered through the induction process which is computer controlled in real time.
1. High precision in size and shape
2. Good low temperature toughness
3. Excellent comprehensive mechanical properties
4. High connection strength and sealability
5. Large inside diameter of tool joint
6. High torque resistance
7. High fatigue strength and long fatigue life
Iron shelves or others suited seashipment
The wall thickness of heavy weight drill pipe is between drill pipe and drill collar. Its structure is similar with drill pipe. It is made from premium alloyed steel. Its both tool joints and middle upset are welded hardbands. Technical parameters meet with API Spec7-1 standard.
This kind of product is made of aisi4145h alloy steel, mainly used between dill collar and dill pipe to ease transition stress concentration between dill collar and drill pipe and reduce the rate between contact area and outer wall wear. To avoid the wear and tear of dill pipe we add each 101m wide belt wear at the top and bottom of follow-welded joint and review 76m wide belt wear on the thickening of the central part of the governing body. To extend its life cycle we can also paint dpc spraying anti-corrosion coatings in the dill pipe wall. If order or inquiry please offer: 18pshoulder chamfer 90pshoulder chamfer It need to be discussed
Integral heavy weight drill pipes are manufactured from AISI 4142H-4145H modified drill collar material , thick-walled pipe called integral heavy weight drill pipe was developed to provid a gradual transition from the heavy weight drill collars to the relatively light weight drill pipe. This intermediate weight pipe has a wall thickness of approximately, and it helps prevent stress concentration at the� top of the drill collars. It also allows you to drill at higher pms, reducing torque and differential pressure sticking. It is intended primarily for directional drilling. Because it bends easily, it simplifies directional control and� minimizes connection fatigue problems common to high angle or horizontal drilling. The reduced number of pipe failures and increased drill stem service also make it appropriate for some straight hole applications. Specification OD ID connection Body Weight mm in mm in Style OD Inner and outer thread Upset mm in Mmd center area Mm � End area Type I� (Length is 9300mm for one piece) ZH-J66-6 5/8FH-I 168.3 6 5/8 114.3 4 1/2 6 5/8FH 209.6 8 1/4 195.70 184.2 176.21 965KG ZH-J55-5 1/2FH-I 139.7 5 1/2 92.1 3 5/8 5 1/2FH 177.8 7 170.7 152.4 144.5 730KG ZH-J50-NC50-I 127.0 5 76.2 3 NC50 168.3 6 5/8 154.0 139.7 130.2 700KG ZH-J45-NC46-I 114.3 4 1/2 71.4 2 13/16 NC46 158.8 6 1/4 145.3 127.0 117.5 585KG ZH-J35-NC38-I 88.9 3 1/2 52.39 2 1/16 NC38 120.7 4 3/4 116.3 101.6 92.1 370KG ZH-J29-NC31-I 73.03 2 7/8 50.8 2 NC31 104.8 4 1/8 100.4 84.1 81.0 220KG Type II� (Length is 13500mm for one piece) ZH-J50-NC50-II 127.0 5 76.2 3 NC50 168.3 6 5/8 154.0 139.7 130.2 945 ZH-J45-NC46-II 114.3 4 1/2 71.4 2 13/16 NC46 158.8 6 1/4 145.3 127.0 117.5 790
Supplier: Drill collars, integral heavy weight drill pipes, stabilizers, subs
Making of aisi 4145h alloy steel, this is a kind of dill collar which add three right out of spiral groove on the outer circle of ordinary drill collar when processing. The main effect is to reduce the drill collar wall in the area of contact and friction when working, maintain uniformity with the mud through spiral mobile, keep the balance of drill string and prevent pressure sticking. The single weight of spiral dill collar is 4% lighter than the same specification of ordinary dill collar , the two ends of the thread and the general shape are the same with drill collar. According to the form of spiral it is divided into type i and type ii. It need to be discuss.
It is made of high quality low-carbon-alloy steel. The raw material undergo a rigorous analysis of the chemical composition by forging, through the testing of mechanical properties of hardness, toughness , impact value and intergranular corrosion cracking performance in order to reach the requirement of standards, at the same time owning a good low permeability and mechanical processing performance . Magnetic permeability(mps=1íß105/4íta/m) Average¦u>r1.010 Magnetic field gradient¦í˜bín0.05ª8t It need to be discussed
Made of AISI4145H alloy steel, drill collar mainly used between the dill pipe and drill head and connected by conversion connector so that they can provide the pressure and weighting to dill head , in order to make the dill head to keep right trace . Api and iso standed
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