WDD340 Triplex HDD Pump

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The Weatherford model WDD340 is a single-acting triplex piston pump rated at 340 hp for intermittent-duty service. This pump is offered with a high-strength, cast-ductile-iron fluid cylinder.

Standard Equipment

  • Cast-ductile-iron fluid cylinders for increased durability and extended life
  • Easy-to-remove pistons (through the front of the cylinder) that do not require removal of the fluid cylinder or liners
  • Chrome iron liners
  • Premium oilfield-style pistons
  • Fully supported crankshaft with double-taper main and cylindrical center roller bearings for long life and durability
  • Built-in power-end lube system that provides proper lubrication even at low speeds and non-level operating locations
  • Premium extension-rod oil seal with four seals that keep power-end oil clean
  • Abrasion-resistant valves

Optional Accessories

  • Weatherford bolt-on gear reducers (ratios)
    2.27 : 1
    2.89 : 1
    3.25 : 1
    3.36 : 1
    3.69 : 1
    4.38 : 1
    4.84 : 1
    5.56 : 1

Specifications

Rated (HP, kW)
340
254
Stroke length (in., mm)
5
127
Maximum discharge pressure (psi, bar)
2,000
138
Rated rod load (lb, kg)
20,750
9,412
Maximum speed (rpm)
350
Minimum speed (rpm)
25
Crankshaft dimensions (in., mm)
   Diameter
4.875
124
   Length (long)
11.69
297
   Length (short)
5.62
143
Keyway, width × depth (in., mm)
1.25 × .62
32 × 16
Oil capacity (gal, L)
   Pump
6.5
24.6
   Bo-on reducer (varies with ratio)
3.5 to 6.5
13 to 25
   Planetary gear reducer
Integral with pump
Estimated weight (lb, kg)
   Pump
4,500
2,041
   Bolt-on reducer
1,100
499
   Planetary gear reducer
80
37
Mechanical efficiency
90%

 

Discharge Connection Sizes (in., mm)
Suction Connection Sizes (in., mm)
3 (76.2) API 2,000 RJ
6 (152.4) ANSI 150 FF

 

Standard

Piston Size (in.)
Displacement (gal/rev)
Rated Pressure (psi)
Rated Capacity
25 rpm
100 rpm
200 rpm
250 rpm
300 rpm
350 rpm
GPM
BPD
GPM
BPD
GPM
BPD
GPM
BPD
GPM
BPD
GPM
BPD
3
0.4590
2,000
11.5
393
45.9
1,574
91.8
3,147
114.7
3,934
137.7
4,721
160.6
5,508
3.5
0.6247
2,000
15.6
535
62.5
2,142
124.9
4,284
156.2
5,355
187.4
6,426
218.7
7,497
4
0.8160
1,650
20.4
699
81.6
2,798
163.2
5,595
204.0
6,994
244.8
8,393
285.6
9,792
4.5
1.0327
1,300
25.8
885
103.3
3,541
206.5
7,082
258.2
8,852
309.8
10,623
361.5
12,393


Metric

Piston Size (in.)
Displacement (L/rev)
Rated Pressure (bar)
Rated Capacity
25 rpm
100 rpm
200 rpm
250 rpm
300 rpm
350 rpm
LPM
M3Hr
LPM
M3Hr
LPM
M3Hr
LPM
M3Hr
LPM
M3Hr
LPM
M3Hr
3
1.7373
138
43.4
2.6
173.7
10.4
347.5
20.8
434.3
26.1
521.2
31.3
608.1
36.5
3.5
2.3647
138
59.1
3.5
236.5
14.2
472.9
28.4
591.2
35.5
709.4
42.6
827.6
49.7
4
3.0886
114
77.2
4.6
308.9
18.5
617.7
37.1
772.1
46.3
926.6
55.6
1,081.0
64.9
4.5
3.9089
90
97.7
5.9
390.9
23.5
781.8
46.9
977.2
58.6
1,172.7
70.4
1,368.1
82.1

General Notes

  1. Capacities shown are based on 100% volumetric efficiency. Actual capacities are lower, based on discharge pressure and speed, typically 95%.
  2. Operating power required by the pump is calculated by the formula:
    HP = (psi × gpm)/1,543, where psi is the actual operating pressure in psi units and gpm is the actual pumping capacity in gpm.
  3. Maximum operating speeds are reduced for increased expendable life in HDD service.
  4. Standard piston sizes are shown; however, other sizes may be available on request. Consult Weatherford for performance and pressure ratings.
  5. Various power inlet options are available, including hydraulic adaptions, bolt-on gear reducer, and planetary gear reducer with SAE flange.