Dog Leg(DL) Reamer

The tool is slightly eccentric reaming tools, using two groups of reverse spiral blade. Its reaming and redressing function not only can drill while expanding the slightly bigger than the drill hole diameter, but also can effectively eliminate the undergr

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Description

Introduction
The tool is slightly eccentric reaming tools, using two groups of reverse spiral blade. Its reaming and redressing function not only can drill while expanding the slightly bigger than the drill hole diameter, but also can effectively eliminate the underground slight dog leg and level, improving the tripping, electric logging, smoothness of the casing and other assignments.
Improved drill bit efficiency and durability has reduced the number of trips made in each hole section, which can frequently deteriorate wellbore quality. As a result, weight-transfer issues can occur during drilling operations, as well as increased tight spots, backreaming during trips, and difficulty running casing or liners.
Our DL Reamer has a unique design that enables it to marginally increase the wellbore diameter while still rotating concentrically. Our proprietary Placement Program ensures optimal tool placement in the BHA, guaranteeing not only maximum tool efficiency but also ensuring there are no negative effects on the bending stresses or contact forces.

Features & Benefits

One-piece construction

Manufactured from a single piece of steel containing material properties that optimally match the connection tool requirements. This ensures a strong, robust design that is properly paired with the adjacent drill-string components.

Eccentric design

By slightly enlarging the wellbore, this significantly improves the efficiency of the tool while also ensuring that the bit will be able to pass through without the need for backreaming. The borehole can be slightly expanded during drilling without affecting the tool's smooth passage through the hole formed by the bit during sliding drilling.

Proprietary placement program

This unique in-house developed software enables DL Reamer placement in the BHA where it is most beneficial from a borehole conditioning perspective while ensuring there are no negative effects on the bending stresses or contact forces.

Low-torque cutting structure

Designed so that the tool will generate less than 5% of the reactive torque generated by the bit with which it is used. In most applications, this results in reduced surface torque when compared to similar offset runs without the DL Reamer in the BHA.

Bi-directional cutting structures

Ensures that the tool is actively improving the wellbore when drilling ahead but also whenever the string is rotating and moving in either direction. The upper and lower cutting blades can realize the normal ream and side redressing while pulling out of the hole.

Unique blade layout

The front spiral blade is arranged to protect the cutting components from impact damage. Designed to offer maximum protection to the cutting structure during drillout and increase the efficiency of the blades to agitate cuttings on the low side of the wellbore in high-angle directional applications.

Large selection of premium PDC cutters

Cutter type and geometry can be optimized to suit the demands of each specific application.

Specifications

Model	Wellbore size(mm)	Thread type	Diameter after expansion(mm)	Body Diameter (mm)
DLR-118	118	211x210	128	105
DLR-152	6’’(152.4)	311x310	158	121
DLR-165	6 1/2’’(165.1)	311x310	175	127
DLR-216	8 1/2’’(215.9)	411x410	226	168
DLR241	9 1/2’’(241.3)	411x410	253	168
DLR-311	12 1/4’’(311.2)	411x410	326	178
DLR-320	320	411x410	336	168