What is a back reamer?

Back reamers are used in Horizontal Directional Drilling (HDD) operations primarily for enlarging the pilot bore to accommodate the carrier pipe. Once the pilot bore is drilled, the drill string is attached with a reamer, and the reamer is pulled back through the hole. The purpose of the reamer is to enlarge the hole.

What is the purpose of reaming in a lathe?

Overview of Lathe Reamers A reamer is a type of cutting tool used in lathes that’s designed to enlarge an existing hole in a workpiece and/or remove scrap material from inside the hole. If you’re familiar with turning process, you probably know that most lathes use a single-bladed cutting tool for turning.

What is reaming in milling?

The process of enlarging the hole is called reaming. There are many different types of reamer and they may be designed for use as a hand tool or in a machine tool, such as a milling machine or drill press.

What is back reaming in drilling?

Backreaming is the practice of pumping and rotating the drillstring while simultaneously pulling out of the hole.

What is the purpose of reaming?

The primary purpose of reaming is simply to create smooth walls in an existing hole. Manufacturing companies perform reaming using a milling machine or drill press.

What type of reamer has a back taper?

Rose reamers are heavy bodied fluted reamers, which incorporate back taper or longitudinal relief on diameter with a chamfer of 45° and no radial relief on the periphery. Rose reamers are used for roughing and for reaming thin stock.

How much material can a reamer remove?

A reamer will not make the original hole; it will only enlarge a previously drilled or bored hole. It will cut to within +0.0005 inches of tool size and give finishes to 32 micro inches. Reamers are usually made of High Speed Steel, although solid carbide and carbide tipped reamers are made in many sizes and styles.

What is back-reaming and how does it work?

During the back-reaming process, the main objective is to mix the cuttings from the back reamer with the drilling fluid to create a slurry that can be displaced to the side of, or discharged out of, the bore hole to allow room for the product. The back-reaming process is critical to the successful completion of the bore.

What is a back reamer used for?

Keep in mind that the back reamer is not only designed to further cut and expand the pilot hole, but also to grind and suspend cuttings to help them efficiently flow out of the bore hole. A good reamer is designed to form and secure the hole for additional reaming or the pullback of product pipe.

Why is back reaming a high risk operation?

Uncontrolled or poorly managed back reaming can be a high risk operation that can lead to a stuck BHA, a packed off hole, hole and formation damage and hole collapse. LinkedIn Chris Ely Expand search Jobs People Learning

Can back reaming cause a stuck BHA?

Back reaming should be avoided if possible. Uncontrolled or poorly managed back reaming can be a high risk operation that can lead to a stuck BHA, a packed off hole, hole and formation damage and hole collapse. Back reaming should be avoided if possible.