API 7-1 X Over Downhole Drilling Tools Drill Pipe Crossover Sub

Drill Pipes Crossover Sub Downhole Drilling Tools API Spec 7-1 X-Over Sub

Crossover Sub Description of Downhole Drilling Tools

Crossover sub is mainly used to connect upper and lower drill tools in different connectors in drilling operations. Also it can be used to protect other tooling in drill stem (called saver sub) or be used to deliver outgoing air to the bit face just above the bit (called bit sub).

The length of crossover subs is generally measured from shoulder to shoulder. Typical lengths range from 6" - 28" long going up in increments of 2 inches with AISI 4145H, AISI 4145H Mod, AISI 4340, AISI 4140-4142 and Non-magnetic material. All connections are phosphate-coated or copper plated to improve resistance to corrosion. Crossover subs come in three basic types: A Pin (male) * Box (female); B Pin (male) * Pin (male); C Box (female) * Box (female)

Cross-over sub acts for conversion and connection and is the basic component in downhole work. It is divided into drill string cross-over sub and tubing Cross-over sub. Drill string Cross-over sub is divided into type A, type B and type C.

Crossover Sub Datasheet of Downhole Drilling Tools

Mechanical properties

A type is straight OD sub, B type is reduced section sub, C type is left hand.

Crossover subs are available with:

· box x pin

· box x box or

· pin x pin connections.

Crossover Subs are manufactured from 4145M or 4140HT alloy steel.

The connections are protected by a phosphate surface coating that minimizes galling on initial make-up.

When ordering, please specify:

· Identify sub use. Example: Kelly Sub, crossover drill pipe to drill collar, drill collar to drill collar, bit sub, etc

· Overall length

· Largest diameter

· Bore ID

· Size and type of upper and lower connections, indicating pin or box

· Cast or pressed-steel thread protectors

· For Reduced Section Subs, add: diameter of reduced section

· Length of reduced section: 8", 12", 18" or 24" For Bit Subs, add: float bore size and type if desired

FAQ

1. Who are we?
Topland is an integrated supplier established in 2008. We are a global group of oilfield supplies with excellent teams in more than 5 countries. such as UAE, Kuwait, Iran and Saudi Arabia. We cooperated with ADES, ECDE, EDC, SOCAR-AQS, PDL, SAKSON, ONGC etc.

2. How can we guarantee quality?
Always a double requirements and drawing checking before the production;
Always final Inspection before shipment;

3. What can you buy from us?
Drilling rig equipment and the related spares for the oil and natural gas industries. Like Rig Components, Drawworks Spare parts and Mud Pump Spare parts, Hydraulic Disc Brake,Solids Control Equipment, Drilling and Fishing Tools,Wellhead Control Equipment,Drilling Accessories, Cementing Equipment and Tools etc.

4. Why should you choose us?
4-1. Professional & Efficient, Customer Focus, Win-win Cooperation

4-2. Fast Quote, Competitive price & within shortest lead time

4-3. Complete Range of products, like spare parts which are interchangeable with most of the well-known OEM equipment.

4-2. Order tracking service

5. How is the packing?

All the packing will meet the strict export packing requirement, we surely know how important the beautiful and firm packaging to the goods.

6. What is your terms of payment?

A: Generally by T/T, 30% advance payment, the balance 70% payment should be paid before delivery. We support EXW, FOB, FCA, CFR, CIF, CIP, DAP, DDU and DDP INCO Terms.

Topland is an integrated supplier specializing in businesses related to the oil and natural gas industries, which was established in 2008. From its birth to the present day, we maintain our status as one of the world’s largest distributors, producers and traders. With a long track record of supplying premium equipment and components with superior quality, we have positioned ourselves as the preferential choice for clients who want access to Chinese manufacturing with proven integrity and value-added service. Now we are a global group of oilfield supplies with excellent teams in more than 4 countries, such as UAE, Kuwait,Egypt and Saudi Arabia.

We are the exclusive distributor of many top-rated manufacturers. We provide a complete range of product categories. In order to serve our customers better, improve their shopping experience, and facilitate buyers in the oil industry to choose the products they need more securely, conveniently and efficiently, we created the Topland online mall:

          Online Mall Entrance: www.toplandoil.com

          ♦ Provide Complete Categories & Multiple Brands.

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          ♦ Download the introduction or data sheet of the listed products

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           ......

Topland constantly strives to provide the excellent products and best service to achieve customers' satisfaction.

Our Vision

Topland works with over 390 oilfield suppliers. We are the exclusive distributor of many top-rated manufacturers. Our focus is on manufacturing, supplying oilfield onshore drill equipment and rig components.We are committed to being a leader in oil and gas industry.

Our Mission

Providing services which exceed our customers' expectations;

Maintaining a work environment that is satisfying to our employees;

Conducting our business in accordance with the highest ethical standards;

HSE

TOPLAND strives to create a favorable working environment for the health, well-being and improvement of its employees; to ensure no accidents and no harm to people; to conduct the company's activities in a manner that, consistent with HSE goals, is environmentally responsible with the aspiration of "no damage to the environment", by using energy efficiently.

Quality Policy

Topland Oilfield Supplies Ltd. is committed to QUALITY, ON-TIME DELIVERY and COST-EFFECTIVENESS, and will:

Provide products and services which meet or exceed customer needs and expectations:

      Strive to meet customer's target values.

      Monitor customer satisfaction.

      Deliver on-time.

      Ship on the date required by the customer.

      Monitor on-time delivery performance.

      Reduce all costs to the lowest possible level.

      Establish Cost Reduction Programs.

      Monitor the Cost of Quality

      Manufacture products which meet customer specifications.