New equipment

PNShT 70-1.9-31.5

Drives of the PNSh (Russian abbreviation for "sucker rod pump drive") and PNShT ("sucker rod pump drive with a three-stage gearbox") are used as individual balancing drives in downhole sucker rod pumps for oil production.
Unlike the similar PNSh 60 sucker rod pump drive, the PNShT 70-1.9-31.5 sucker rod pump has a wider range of lengths of travel of the polished rod.
For improved operational safety of the drive, it is provided with a special-purpose 2-meter high barrier that restricts access to both the sucker rod pump and the wellhead. An additional housing is provided to protect the electric motor. The lid of the gearbox hatch and the drain plug are protected against tampering and unauthorized draining of oil.

Technical specs of the DP70 drive:

Parameter description

PNShT 70-1.9-31.5

Maximum load on the wellhead rod, kN (lbf)

70 (15736)

Nominal lengths of travel of the wellhead rod, m (in)

1,9 (74); 1,6 (64); 1,2 (48);
0,9 (36); 0,5 (20); 0,3 (12)

Gearbox

2-stage RP450-28

- nominal transmission ratio of the gearbox

40

- inter-axial distance between stages, mm (inches)

280 (11); 450 (17  3/4)

- nominal torsional moment on the driven shaft of the gearbox, kN*m (lbf*in)

31,5 (278800)

- type of engagement of gear stages:           
Input
Output

Herringbone (double-helical) gears of the Novikov system

- approximate volume of oil in the crankcase, L (gal)

85 (22,45)

- gearbox dimensions, mm (in):
- length
- width
- height


1450 (57)
1542 (60 3/4)
958 (37 3/4)

- gearbox weight (without oil), kg (lbs)

2210 (4872)

Brake

Drum-type

Transmission

Poly-V belt

- belt type


20PL4051 (1595L20)
(4,051 mm (159.5 in) – effective length, L – belt type, 20 – number of fins)

- pulley diameter:
Gearbox pulley, mm (in)
Motor pulley, mm (in)


900 (35  1/2)
200 (7  3/4); 250 (9 3/4); 280 (11); 315 (12  1/2)

- Rocking frequency, мин-1 (at motor revolutions of 900 RPM)

5; 6,2; 7; 7,9

Dimensions of the sucker rod pump (with the horse head in horizontal position), mm (in):
length 
width (without the barrier)
height



6450 (253  15/16)
2050 (80  3/4)
5425 (213  5/8)

Sucker rod pump weight, kg (lbc)

10000 (22050)

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