Drill Pipe

Drill Pipe

What is Drill Pipe?
Drill pipe, is hollow, thin-walled, steel or aluminium alloy piping that is used on drilling rigs. It is hollow to allow drilling fluid to be pumped down the hole through the bit and back up the annulus. It comes in a variety of sizes, strengths, and wall thicknesses, but is typically 27 to 32 feet in length . Longer lengths, up to 45 feet, exist .
How to Work with Drilling Pipe?
The drilling tool is connected drill rod for transferring power. The drill string is usually part are: drill, drill collars, drilling pipe, stabilizers, special connectors and Kelly. The basic role of the drill string are: (1)control the drill bit; (2) imposed WOB; (3) transmission of power; (4) transporting drilling fluid; (5) special operations: extrusion of cement, handling underground accidents.

We offer:

Pipe Type:Drill pipe，API 5DP Drill pipe； Heavy Weight Drill Pipe (HWDP),Down Hole Drill Rod,Drill Pipe, Square and Hexagonal Kelly

Size: 2-3/8"--6-5/8"
Standard: API 5DP
Grade: E75, G105, S135, SS-105, X95, X57, X75, X39
Length: Range 1, Range 2, Range 3

Range 1 (R1) is shortest in length, more common for sizing production tubing or casing, and ranges from 18 to 22 ft.
Range 2 (R2) is considered the standard length for drill pipe and ranges from 27 to 31 ft.
Range 3 (R3) is common in casing and also deployed in deep water drilling applications. The increased length decreases the number of tool joints in each stand of drill pipe. The fall back being that the load exerted on each tool joint is greater increasing wear and reducing the expected life of the drill pipe. R3 ranges from 38 to 45 ft.

Thread/Connection Types of Drill Pipe
NC26, NC31, NC38, NC40, NC46, NC50, 5-1/2 FH, 6-5/8 FH
XT Connection of Drill Pipe
XT connections facilitate the use of larger drill pipe in a set hole size, such as 5⅞ in. drill pipe with XT 57 in an 8½ in. hole size.

Chemical Composition(%):

Mechanical Properties:

Diameter
The outer diameter (OD) of the drill pipe is offered in nominal sizes ranging from 2 3/8\" to 6 5/8\". The diameter of pipe is selected based on the borehole diameter. In order to effectively circulate drilling mud and minimize pressure losses, the ratio of drill pipe outside diameter to borehole diameter should be about 0.6.

Upset

 

The upset (thread-end finish) refers to the wall of the tool joint at the threaded connection. Drill pipe is offered with an internal upset (IU), an external upset (EU), or an internal-external upset (IEU).

IU

IU - In an internal upset increased thickness along the inside walls compensate for the metal removed in threading with a uniform, straight outside wall.

EU

EU - In an external upset the increased thickness along the outside diameter of the tubing compensates for the metal removed in threading with a straight bore.

IEU

IEU - In an internal-external upset thickness is increased along both the inside and outside walls of the pipe to compensate for the metal removed in threading.

 

Tool Joint
Each end of the pipe incorporates a tool joint, and is differentiated by the male threaded connection referred to as the "pin" and the female threaded connection which is referred to as the "box". They are pre-fabricated and welded onto the pipe. The tool joints provide high-strength, threaded connections. They are heat treated to a higher strength than the steel of the tube body in order to survive the rigors of drilling and numerous cycles of tightening and loosening of threads. Tool joints are specified by upset and thread type.
Threaded Connection
Tool joints incorporate threaded connections. They include standard API threads as well as proprietary threads. Each type of threaded connection is specified by threads per inch (TPI) and it's taper. Common API tool joints include regular (REG), full-hole (FH), and internal-flush (IF).

DRILL PIPE PRODUCTION PROCESS

APPLICATION

Drill pipe is a steel pipe with a thread at the end. It is mainly used to connect the surface equipment of the drilling rig to the drilling and grinding equipment or bottom hole device at the bottom of the drilling well. Its main application areas include:

Oil and Gas Exploration

 

rill pipe plays an important role in oil and gas exploration, especially in drilling and completion operations, being able to withstand tremendous stress, heat and loads.

Coal mines

 

Drill pipes are also widely used in drilling operations in coal mines.

How to maintain drill pipe?
1. Regular maintenance: Drill pipe should be maintained regularly. The maintenance cycle should be determined according to the use environment and air humidity, and anti-rust oiling and dust-proof treatment should be carried out regularly.
2. Reasonable use: Drill pipe should be used within the rated drilling distance of the drilling rig. According to the drilling distance and the technical parameters of the drilling rig model, select the matching drill pipe.
3. Inspection and replacement: When the bend of the drill pipe exceeds the standard requirements or the thread is damaged and cannot work normally after use, it should be scrapped or returned to the factory for repair in time.
4. Pay attention to the drilling process: During the drilling process, you should always pay attention to the condition of the drilling rig and drill pipe. If drill sticking or locking occurs, drilling should be stopped immediately or drilled back and then drilled slowly to ensure that the drill pipe does not bend or deform.
5. Acid and alkali environment treatment: When operating in acid and alkali areas, attention should be paid to the corrosion of drill pipes. After drilling is completed, the surface of the rod body should be cleaned with clean water in time to remove the corrosion layer.
How to store drill pipe?
1. Storage location: The storage location should be flat, well-drained, and avoid accumulation of water, direct sunlight, and moisture from rain and snow. A fence should be set up on site with a height of no less than 2 meters to prevent outsiders from entering and to protect the drill pipe.
2. Storage method: When storing the drill pipe, it should be placed vertically on the ground and try to avoid the drill pipe falling sideways or horizontally. This reduces bending rates and facilitates inspection of drill pipe length, diameter and shape.
3. Storage conditions: The drill pipe needs to be stored in a dry place, and the bottom should be supported at multiple points to prevent deformation. Drill pipe should be maintained regularly during long-term storage.
4. Handling of seals: If the drill pipe has seals (such as O-rings), special attention should be paid to the use of seals. When damage, corrosion, etc. occur, seals must be replaced in time. After drilling is completed, the seal must be maintained and cleaned.
5. Avoid heavy pressure: Drill pipes must not be used as a support platform for heavy-duty tail stacking, and drill pipes must not be placed under piles of gravel or coal or stacked randomly.

OUR FACTORY

GNEE has 50 steel production lines, 30 processing equipment for processing, bending, painting, heat treatment, cutting, drilling, beveling, tempering, and surface treatment. It has complete testing equipment and strong technical force.

When purchasing drill pipe, here are some suggestions for reference:
1. Understand the needs: First, clarify the specific needs for purchasing drill pipes, including usage scenarios, working environment, drilling capacity, hole diameter and other parameters, so as to select the appropriate drill pipe type and specifications.
2. Consider the material: The material of the drill pipe has an important impact on its performance and service life. According to specific needs, select suitable materials, such as alloy steel, steel, stainless steel, carbon steel, titanium alloy, carbon fiber, silicone steel, etc.
3. Consider torque: When the drill pipe transmits torque, it is necessary to consider whether its design torque is greater than the design torque of the drilling rig to ensure the stability and safety of the drill pipe during the drilling process.
4. Consider weight: The weight of the drill pipe is also an important consideration, especially when it comes to lifting systems. Make sure that the weight of the drill pipe is compatible with the maximum pulling force of the lifting system to avoid unexpected situations during the lifting process.
5. Consider price: The prices of drill pipes of different brands, materials and specifications may be different. When purchasing, choose cost-effective products based on your budget and actual needs.

We're well-known as one of the leading drill pipe manufacturers and suppliers in China. If you're going to buy discount drill pipe in stock, welcome to get quotation and free sample from our factory. Also, customized service is available.