Non-magnetic heavy weight drill pipe API Spec 7 and SY/T5144

Description

ELITE non-magnetic heavy-weight drill pipe and Non-magnetic compressive service drill pipe is made of self-developed low-carbon stainless stell. Which implements API specifcations and SY/TS146 standards. And an be cold rolled onthe thread. Which can process double shoulder threads and other special threads of other specifications. And can undertake a variety of non-standard products.

1. Materials and manufacturing process of non-magnetic weighted drill pipe

Core material: low magnetic permeability alloys such as austenitic stainless steel (316L, 304L), Monel or Inconel, the magnetic permeability is usually less than 1.005 (the magnetic permeability of ordinary steel is about 200-1000).

Heat treatment process: solution annealing is using to eliminate residual magnetism and ensure that the material remains stable under high temperature and high pressure.
Surface treatment: some designs will be hard chrome plated or sprayed with wear-resistant coating to enhance corrosion and wear resistance.

• Special structure of NMD HWDP：

Thickened pipe body: The wall thickness is significantly greater than that of conventional drill pipe, providing higher tensile strength and torsion resistance (such as the wa

ll thickness of NMDHWDP with an outer diameter of 4.5 inches can reach 1.25 inches).
Special joint design: double shoulder (DS) thread (such as API NC50, FH, etc.) is using to ensure high torque transmission capacity while reducing stress concentration.

2. Special functions and applicable scenarios

Directional drilling: Avoid geomagnetic azimuth measurement errors caused by magnetic interference of drill string in MWD (measurement while drilling) and LWD (logging while drilling) operations.
Geological guidance: Accurately identify reservoir boundaries, especially in horizontal wells and large displacement wells, to ensure the accuracy of wellbore trajectory control.

• Non-magnetic heavy weight drill pipe Replacement of some drill collar functions:

Weight and stiffness balance: The linear density of NMD HWDP is between the drill pipe and the drill collar (such as 50-70 lb/ft), which can replace some drill collars, reduce the total weight of the drill string, and reduce the risk of stuck drill.
Flexible transition: As a transition section in the drill string assembly, it relieves the fatigue stress at the connection between the drill collar and the drill pipe.

3. Applications in MWD and LWD.technical advantages of ELITE

• Improve measurement accuracy
• The magnetic permeability is less than 1.005, which makes the MWD tool less affected by the geomagnetic field, and the azimuth error can be controlled within ±0.5°.&lt;/li></li></li>
• En

hance the safety of drilling operations
High torsional strength (such as torsional strength of 40,000 lbf·ft) and tensile strength (such as minimum tensile strength of 1,500 kN) to adapt to complex formation conditions.
Reduce repeated logging caused by magnetic interference and reduce non-productive time (NPT).

Advantages of ElITE non-magnetic heavy weighted drill pipe:

Compared with the full drill collar combination, NMDHWDP can reduce the weight of the drill string by about 20-30%, reducing the load and fuel consumpt

ion of the drilling rig.
Extend service life: The wear-resistant coating design increases its service life in abrasive formations by more than 30%.
Using high-strength corrosion-resistant alloy, the coating can be customizing.

Click here to get a quote for Elite non-magnetic heavy-duty drill pipe

ELITE non-magnetic product recommendations: non-magnetic drill collars, non-magnetic stabilizers.

Non-magnetic HWDP often works together with Non-Magnetic Drill Collars and Stabilizers to form a complete BHA assembly.