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Drill Collar

API SPEC 7-1 drill collar is made with rolling or forging AISI4145H chromium molybdenum alloy steel. Therefore, it needs to control chemical composition and the content of trace elements effectively.

keyword:

Oil country tubular goods

PRODUCT DETAILS

API SPEC 7-1 drill collar is made with rolling or forging AISI4145H chromium molybdenum alloy steel. Therefore, it needs to control chemical composition and the content of trace elements effectively.

Drill collar is a specialized tool used in the drilling of oil and gas wells. It is a heavy and thick-walled tube that is made of high-strength steel. The drill collar is attached to the drill string and is located directly above the drill bit. Its primary function is to provide weight on the drill bit, which helps to maintain a consistent rate of penetration and prevent deviation of the borehole.

One of the key advantages of drill collars is their ability to provide directional control during drilling. By adding more weight to the drill bit, the drill collar helps to keep the bit aligned with the desired direction of the borehole. This is especially important in directional drilling, where precise control of the wellbore trajectory is required.

Drill collars also play an essential role in the transmission of drilling torque from the drilling rig to the drill bit. The heavy weight of the drill collar helps to transfer the rotational force from the drill string to the drill bit, enabling efficient and effective drilling.

In addition to its primary functions, the drill collar can also be equipped with additional tools and accessories to enhance its capabilities. For example, stabilizers can be attached to the drill collar to help maintain the stability of the drill string and prevent it from deviating from the desired path.

Overall, drill collars are crucial components in the drilling of oil and gas wells. Their ability to provide weight, directional control, and torque transmission makes them essential tools for efficient and effective drilling operations. With their high-strength construction and versatility, drill collars are widely used in the oil and gas industry to achieve optimal drilling results.

Specification

Standard

Number

OD
(in.)

ID
(in.)

Length
(ft)

Weight
(lb/ft)

Typical Bending
Strength Ratio

SY5144-2007/API7-1

NC 23-31

3-1/8

1-1/4

30

22

2.57:1

NC 26-35 (2-3/8 IF)

3-1/2

1-1/2

30

27

2.42:1

NC 31-41 (2-7/8 IF)

4-1/8

2

30 or 31

34

2.43:1

NC 35-47

4-3 /4

2

30 or 31

47

2.58:1

NC 38-50 (3-1/2 IF)

5

2-1/4

30 or 31

54

2.38:1

NC 44-60

6

2-1/4

30 or 31

83

 

 

Warehouse Storage

Shandong Juhuo Special Steel Co., Ltd. is a comprehensive enterpriseintegrating steel supply and processing. The company has a large inventory ofvarious metal materials such as stainless steel, galvanized, profiles, aluminum.copper, lead, etc, which can meet the needs of customers in different fields.The company has strong strength and has a professional and technical teamwith excellent technology and rich experience.The company has also introduced advanced production equipment andprocessing technology, which can provide customers with steel products ofvarious specifications and processing requirements.

 

 

Packing and shipping

Thecompany has also established a complete after-sales service system to providecustomers with first-class services.In the company's business philosophy, customer first, integrity-based, qualityfirst. 

 

 

Customer conversation

We provide the products consultation , purchase plan suggestion , logistic service ( including the shipment service , custom works ,etc ).

 

 

Application field

Taking technology as the guide, quality as the guarantee, and service asthe purpose, the company actively explores the market, expands the scale ofoperation, and constantly improves enterprise management to ensure productquality and service quality.

 

 

Customer visit

 

 

Certificate

 

Partners

OUR PROMISES:
Reasonable Price, Reliable Quality,Considerate Service

图片名称
shrn steel
shiheng speclal steel
ansteel
ansteel
Hangzhou Iron and Steel
Benxi Steel
Tianjin Iron and Steel
Wuhan Iron and Steel
Shagang Group
Panzhihua Steel
Tangshan Iron and Steel
Baotou Steel
Maanshan Iron and Steel Group
Guangzhou Iron and Steel
Valin Steel

Q:What is your working time?

A:In general, our online service time is Beijing time: 8:00-22:00, after 22:00, we will reply to your inquiry during the next working day.

Q:How to pack the products?

A:The inner layer has a waterproof paper outer layer with iron packaging and is fixed with a fumigation wooden pallet. It can effectively protect products from corrosion during ocean transportation.

Q:Can you send samples?

A:Of course, we can send samples to all parts of the world, our samples are free, but customers need to bear the courier costs.

Q:What product information do I need to provide?

A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase.

Q:What are the shipping ports?

A:Under normal circumstances, we ship from Shanghai, Tianjin, Qingdao, Ningbo ports, you can choose other ports according to your needs.

Q:About product prices?

A:Prices vary from period to period due to cyclical changes in the price of raw materials.

Q:What are the certifications for your products?

A:We have ISO 9001, SGS, EWC and other certifications.

Q:How long does your delivery time take?

A:In general, our delivery time is within 30-45 days, and may be delayed if the demand is extremely large or special circumstances occur.

Q:Can I go to your factory to visit?

A:Of course, we welcome customers from all over the world to visit our factory. However, some of the plants are not open to the public.

Q:Does the product have quality inspection before loading?

A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.

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