Welded Blade Stabilizers

OTI’s Welded Blade Stabilizers is used in the BHA for drilling soft to medium hard formation holes and are available in three types namely Spiral Blade, Straight Blade and Straight Blade Offset.

All Stabilizer bodies are manufactured from modified AISI 4145H chromium molybdenum alloy steel that conform to ASTM A-370 requirements. All the mechanical and chemical properties meet the requirements of Addendum 3 of API Spec. 7-1 (latest edition). Stabilizer bodies are precision bored and drifted to API specifications.

Mild steel blades are welded onto the body using strictly controlled pre-heating, post-weld heat treatment and validated weld application techniques.

All areas that are affected by the process of welding are subject to full non-destructive examination to assure the mechanical integrity of the joint.

Standard Welded Blade Stabilizers are available in 3 or 4 blade configuration with the “Spiral” type available with Open or Tight spiral.

STANDARD DIMENSIONS

A

6 1/2

12 1/4

17 1/2 26 36

B

3/4 1/2

8

1/2 1/2 1/2-11

C

28 28

28

28

28 28

D

12 14

16

18

20 20

E

60 66

71

74

84 94

F

1/2 2

2

1/2

3 3

G

1/4  

 

3

3 3

H

1/2 IF 1/2 IF 5/8

5/8

5/8 5/8-8 5/8

Note: All dimensions are in inches unless stated otherwise. Other stabilizer sizes are available on request

SPECIAL OPTIONAL FEATURES:

Stress Relief Features: API Stress Relief Features like Relief Groove on Pin Connections and Bore Back on Box Connections are optional features that the customer can specify.

Cold Rolled Thread Roots: Cold Rolling of Thread Roots is another optional feature that is available to the customer.

Hardfacing: Hardfacing is applied on the leading edge as an additional protection (optional). OTI HF 1000 or HF 2000 are most commonly applied to Welded Blade Stabilizers. Information on OTI’s Hardfacings can be found on the appropriate data sheet.

Ordering Instruction:
When ordering or requesting quotations for Welded Blade Stabilizers, please specify the following:
  1. Hole size.
  2. Drill Collar Size / Fishing Neck Diameter and ID.
  3. Type of Stabilizer – String or Near Bit.
  4. Size, type and location of connections, Eg: NC 50 BOX Up x NC 50 PIN Down.
  5. Blade Type – Spiral (also specify Open or Tight Spiral) / Straight / Straight Offset.
  6. Cast or Pressed Steel Thread Protectors.
  7. Special Optional Features as desired – Stress Relief Features & Cold Rolled Threads.
Welded Blade Stabilizers Oil Tools