WDD550 Quintuplex HDD Pump

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The Weatherford model WDD550 is a single-acting triplex piston pump rated at 550 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 removing the fluid cylinder or even the 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 providing proper lubrication even at low speeds and non-level operating locations
  • Premium extension-rod oil seal with four seals to 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)
550
410
Stroke length (in., mm)
5
127
Maximum discharge pressure (psi, bar)
2,000
138
Rated rod load (lb, kg)
21,000
9,525
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
12
46
   Reducer
3.5 to 6.5
13 to 25
Estimated weight (lb, kg)
   Pump
7,800
3,538
   Bolt-on reducer
1,100
499
Mechanical efficiency
90%

 

Discharge Connection Sizes (in., mm)
Suction Connection Sizes (in., mm)
4 (101.6) API 2000 RJ
8 (203.2) 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
0.7650
2,000
19.1
656
76.5
2,623
153.0
5,246
191.2
6,557
229.5
7,869
267.7
9,180
3.5
1.0412
2,000
26.0
892
104.1
3,570
208.2
7,140
260.3
8,925
312.4
10,710
364.4
12,495
4
1.3600
1,670
34.0
1,166
136.0
4,663
272.0
9,326
340.0
11,657
408.0
13,989
476.0
16,320
4.5
1.7212
1,320
43,9
1,475
172.1
5,901
344.2
11,803
430.3
14,754
516.4
17,704
602.4
20,655


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
2.8955
138
72.4
4.3
289.6
17.4
579.1
34.7
723.9
43.4
868.7
52.1
1,013.4
60.8
3.5
3.9411
138
98.5
5.9
394.1
23.6
788.2
47.3
985.3
59.1
1,182.3
70.9
1,379.4
82.8
4
5.1476
115
128.7
7.7
514.8
30.9
1,029.5
61.8
1,286.9
77.2
1,544.3
92.7
1,801.7
108.1
4.5
6.5149
91
162.9
9.8
651.5
39.1
1,303.0
78.2
1,628.7
97.7
1,954.5
117.3
2,280.2
136.8

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.