The Original
LT SERIES

Open Bigger. Drill Smarter. Cut Torque.

The Original LT Series Hole Opener from Dynamic Downhole Innovations is built to deliver dependable performance in the toughest horizontal drilling applications. Its rugged single-body design allows operators to open multiple hole sizes using interchangeable, sealed-journal bearing cutters—all replaceable directly on the drill string to minimize downtime and keep operations moving.

Engineered specifically to reduce drill-string torque, the Original LT Series enables even smaller rigs to ream efficiently through formations ranging from soft soils to extremely hard rock. Cutter options include traditional milled tooth designs for softer formations, along with a full range of six specialized Tungsten Carbide Insert (TCI) cutters designed for varying hardness levels, impact resistance, and wear protection.

Each cutter is gauge-protected and optimized for durability, ensuring controlled penetration and consistent performance even as geological conditions change.

Available in both push and pull configurations, the Original LT Series Hole Opener features a streamlined body profile that reduces repairs and maintenance, delivering reliable, cost-effective performance on every job.

Tool Highlights

  • Low-Torque Design
  • Interchangeable Cutters
  • Multi-Formation Performance
  • Gauge-Protected Durability
  • Push or Pull Configurations

Robust Single-Body Design

Built from a solid, single-piece body, the DD Viper is engineered to withstand extreme torque and impact in the toughest rock. Fewer failure points mean greater strength, longer life, and confidence on every pass.

Made In-House. Made in America.

Dynamic Downhole is the only HDD supplier that designs, machines, and assembles every product in-house, in the USA—from start to finish.

QUALITY CONTROL: BUILT TO BE A WORKHORSE

Every downhole tool we build is the result of disciplined processes, constant checks, and hands-on accountability. Our manufacturing is monitored, measured, and reviewed regularly to ensure every component meets our exacting standards before it ever reaches the field.

Engineered Without Compromise

From cutter sizes to tool dimensions, every spec is built to handle extreme loads and demanding formations.

The Original LT Series V4 & V6 Sizes

Body

# of Cutters

Min Pilot Hole

Connection (Box x Box)

Body Weight

Length

A*

B*

C*

D*

E*

LT2
3
2.5"
2 IF B x P
16 lbs.
24"
6"
LT3
3
4.75"
2 3/8” IF or Reg
40 lbs.
29"
7"
8.5"
10"
12"
LT4
3
4.5"
2 7/8 IF B x P
160 lbs.
37.5"
8"
10"
12"
LT6
3
6.5"
3 1/2 IF B x P
304 lbs.
44"
12"
14"
16"
LT8
3
8.5"
4 1/2 IF B x P
628 lbs.
48.5"
16"
18"
20"
22"
24"
LT16
3
18"
7 5/8 reg B x P
1,194 lbs.
48.5"
24"
26"
28"
30"
32"
LT16-4
4
18"
7 5/8 reg B x P
1,252 lbs.
48.5"
24"
26"
28"
30"
32"

* Opening Range

The Original LT Series X Hole Opener Specifications

Body

# of Cutters

Min Pilot Hole

Connection (Box x Box)

Body Weight

Length

C*

D*

E*

E*

LTX10
3
10.5"
6 5/8 reg B x B
850 lbs.
61"
22"
24"
26"
28"
LTX12
3
12.25"
7 5/8 reg B x B
1,462 lbs.
61"
24"
26"
28"
30"
LTX18
3
20"
7 5/8 reg B x B
1,915 lbs.
58"
30"
32"
34"
36"
LTX18-4
4
20"
7 5/8 reg B x B
1,960 lbs.
58"
30"
32"
34"
36"
LTX24-5
5
26"
7 5/8 reg B x B
2,055 lbs.
58"
36"
38"
40"
42"
LTX30-5
5
32"
7 5/8 reg B x B
2,570 lbs.
58"
42"
44"
46"
48"
LTX36-6
6
38"
7 5/8 reg B x B
3,175 lbs.
58"
48"
50"
52"
54"
LTX42-6
6
44"
7 5/8 reg B x B
3,390 lbs.
58"
54"
56"
58"
60"
LTX48-6
6
50"
7 5/8 reg B x B
3,90 lbs.
58"
60"
62"
64"
66"
LTX48-7
7
50"
7 5/8 reg B x B
3,955 lbs.
58"
60"
62"
64"
66"
LTX54-7
7
56"
7 5/8 reg B x B
4,250 lbs.
58"
66"
68"
70"
72"

* Opening Range

Get the Right Tool for the Job

Talk with our experts to dial in the right setup for your formations, cutter sizes, and drilling goals.

Contact Us