Optimax Damaged Bore Safety Valve

Contact

Restores safety-valve functionality in wells with damaged safety-valve landing nipples or hone bores

Applications 

  • Wells with groove- or gouge-damaged  safety-valve landing nipples
  • Wells with groove- or gouge-damaged  hone bores in tubing-retrievable subsurface safety valves (TRSSV)
  • Wells in which hone-bore debris or corrosion prevents conventional wireline-retrievable or insert-valve sealing
  • Sour- and critical-well applications

Features and Benefits 

  • Restores safety-valve functionality without a major workovers, which saves operational time and costs 
  • Seals hone bores with damage of to up to 0.039 in. (1 mm) to American Petroleum Institute (API) standards 
  • Installs without additional accessory tools or special procedures, and the packing stacks do not energize until they are seated in the nipple 
  • Enables optimal production with a larger through-bore and flow area and does not reduce ID or restrict flow when installed 
  • Provides a metal-to-metal, through-the-flapper equalizing technology that effectively seals the wellbore 
  • Offers compatibility with third-party lock profiles
  • Includes a dynamic seal system that includes a rod piston, proprietary Viton® elastomeric T-seal, and moly-filled Teflon® bearing backup rings
  • Provides a reliable low-pressure seal with the Viton flapper soft seal

Tool Description 

The Weatherford Optimax Model WDB WRSSV restores safety valve functionality in wells with damaged safety valve systems, including those with damaged landing nipples or hone bores, without a major workover. Caused by running tools through the nipple and operations such as snubbing, hone-bore damage (including grooves, gouges, debris, and corrosion) can prevent conventional wireline and insert valves from functioning properly. This can result in well control loss, intermittent service, or possible damage to other insert equipment in the completion.  

The tool features a standard valve-and-lock assembly and a patented packing mandrel, which provides effective sealing in damaged landing nipples. Applied force to the packing stacks significantly improves the sealing capabilities. Floating pistons energize the packing stacks and are activated by tubing pressure from one side and control-line pressure from the other. The Model WDB exceeds API 14A requirements and operates up to 10,000-psi (68.9-MPa) gas-differential pressure at 300°F (149°C).  

Specifications

Size
2-7/8 × 2.313 in.
(73.0 × 58.75 mm)
3-1/2 × 2.813 in.
(89.9 × 71.45 mm)
4-1/2 × 3.437 in.
(114.3 × 87.30 mm)
4-1/2 × 3.813 in.
(114.3 × 96.85 mm)
5-1/2 × 4.562 in.
(139.7 × 115.90 mm)
Nipple profile
X B DB-6 B RRQ DB-6 RRQ
Maximum lock OD
2.281 in.
(57.94 mm)
2.868 in.
(72.85 mm)
3.488 in.
(88.60 mm)
3.860 in.
(98.04 mm)
3.858 in.
(97.00 mm)
3.860 in.
(98.04 mm)
4.620 in.
(117.35 mm)
Minimum flowing ID
1.180 in.
(29.97 mm)
1.433 in.
(36.40 mm)
1.630 in.
(41.40 mm)
2.165 in.
(55.00 mm)
2.465 in.
(62.61 mm)
Overall length
47.50 in.
(120.6 mm)
57.70 in.
(146.6 mm)
55.35 in.
140.5 mm
59.05 in.
(150.0 mm)
64.00 in.
(162.6 mm)
59.05 in.
(150.0 mm)
62.50 in.
(158.7 mm)
Working temperature
30° to 300°F
(–1° to 149°C)
Working pressure
10,000 psi
(68.9 MPa)
Operating pressure
(full open)
2,000 psi
(13.8 MPa)
Operating pressure
(full closed)
1,000 psi
(6.9 MPa)
Test pressure
9,750 psi
(67.2 MPa)
9,000 psi
(62.1 MPa)
9,750 psi
(67.2 MPa)
7,500 psi
(51.7 MPa)
Fail-safe setting depth
2,000 ft
(610 m)

 

Actuation system
Rod piston, Viton elastomeric T-seal, and moly-filled Teflon bearing backup rings
verified to 10,000 psi (68.9 MPa) gas differential pressure at 300°F (149°C)
Flapper soft material
Viton seal
Lock and majority of safety-valve components
Minimum 13Cr, 80,000 psi (551.6 MPa) MYS, heat treated
Rod piston, flapper, seat
INCOLOY® 925, heat treated
Power spring, flapper pin, torsion spring
MP35N, heat treated
Design compliance
API 14A
Manufacturing compliance
API Q1 and API 14A
Class of service
3S2

Options

  • The WDB(E) model includes a through-the-flapper self-equalizing feature.