CN202091159U

CN202091159U - High-pressure mechanical sealing ground driving device of screw pump

Info

Publication number: CN202091159U
Application number: CN201120199820XU
Authority: CN
Inventors: 韩全伟; 陈维良
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-15
Filing date: 2011-06-15
Publication date: 2011-12-28
Anticipated expiration: 2021-06-15

Abstract

The utility model discloses a high-pressure mechanical sealing ground driving device of a screw pump and relates to the high-pressure mechanical sealing ground driving device of the screw pump, which is used in oil fields. The high-pressure mechanical sealing ground driving device is designed mainly for solving the problems that the traditional screw pump ground driving device has poor pressure resistance, and the mechanical sealing is easy to damage. The high-pressure mechanical sealing ground driving device of the screw pump comprises a supporting body, wherein the supporting body is provided with an oil outlet; a mechanical seal with double end surfaces is arranged above the supporting body; a motor reducer is arranged above the mechanical seal with the double end surfaces; the hollow shaft of the reducer extends into the sleeve gasket of the mechanical seal with the double end surfaces and is fixed with the sleeve gasket by nuts and keys; the supporting body is provided with a shunting body; the shunting body is provided with a pressure gage; the shunting body is provided with an oil pipe communicated with the inner cavity of the supporting body; the shunting body is also provided with a crude oil pipe communicated with the lower-pressure cavity of a pressurization jar; the oil pipe is provided with a stop valve; the pressurization jar is provided with a pressure gage; a high-pressure cavity of the pressurization jar is provided with a lubricating oil pipe communicated with a lubricating oil cavity of the mechanical seal with the double end surfaces; and the lubricating oil pipe is provided with a lubricating oil inlet. The high-pressure mechanical sealing ground driving device has good sealing effect and can resist pressure of 10MPa.

Description

Screw pump high-pressure mechanical seal surface drive

Technical field:

The utility model relates to a kind of oil field screw pump high-pressure mechanical seal surface drive.

Background technique:

At present, in the field produces operation, the support upper fixed of screw pump surface drive has single mechanical end face seal, since single mechanical end face seal can only anti-3MPa pressure, increase in case down-hole pressure is instantaneous, will cause the mechanical seal of screw pump surface drive to damage crude oil leakage, befouling environment, this screw pump surface drive more can not be applied in the offshore oilfield manufacturing operation.

Summary of the invention:

Technical problem to be solved in the utility model provides the pressure that a kind of mechanical seal can anti-10MPa, good sealing effect, safe and reliable screw pump high-pressure mechanical seal surface drive.

Above-mentioned purpose is achieved in that it comprises support, oil outlet is arranged on the support, the support upper fixed has double mechanical seal, the double mechanical seal upper fixed has motor reducer, the hollow shaft of speed reducer extend in the stuffing box gland of double mechanical seal, and be connected and fixed by the stuffing box gland of nut and key and double mechanical seal, the stuffing box gland of double mechanical seal and the hollow shaft of speed reducer rotate synchronously, the branch fluid is housed on the support, divide on the fluid pressure gauge is arranged, divide fluid to have oil pipe to be communicated with the support inner chamber, divide fluid to also have the crude oil oil pipe to be communicated with, on this crude oil oil pipe stop valve is arranged, pressure gauge is also arranged on the booster jar with the low-pressure cavity of booster jar, the hyperbaric chamber of booster jar has the lubricant oil oil pipe to be communicated with the lubricant reservoir of double mechanical seal, and the lubricant oil filler opening is arranged on the lubricant oil oil pipe.

Motor reducer can be replaced with direct driving motor.

Working principle of the present utility model and advantage are: the transmission polished rod with screw pump during work is connected with the hollow shaft of motor reducer or direct driving motor by the moment of torsion clamp, motor reducer or direct driving motor work drive screw pump work, after entering the support inner chamber, the crude oil of underground extraction enters oil transport pipeline from oil outlet, under the effect of support internal pressure, crude oil enters the branch fluid, enter the low-pressure cavity of booster jar through the crude oil oil pipe by stop valve, promote the booster jar inner carrier, make the lubricant oil supercharging of booster jar hyperbaric chamber, lubricant oil enters the lubricant reservoir of mechanical seal through the lubricant oil oil pipe, make lubricant reservoir produce pressure, the rotating ring that promotes the mechanical seal zone of high pressure is to the stationary ring application of force, with joint efforts stationary ring is compressed with spring, guarantee sealing, prevent crude oil leakage.Advantage is because it has used double mechanical seal and booster jar, by the supercharging of booster jar, make the pressure of double mechanical seal rotating ring be higher than the pressure of stationary ring all the time, so this device good sealing effect, withstand voltage, pressure that can anti-10MPa can be used in the offshore oilfield manufacturing operation; In addition, because the rotating ring and the stationary ring of this device double mechanical seal all are immersed in the lubricant oil, rotating ring and stationary ring lubricate, thus not easy to wear, long service life.

Description of drawings:

Accompanying drawing is a structural representation of the present utility model.

Embodiment:

With reference to accompanying drawing, it comprises support 1, oil outlet is arranged on the support, the support upper fixed has double mechanical seal 4, the double mechanical seal upper fixed has motor reducer 6, the hollow shaft 7 of speed reducer extend in the stuffing box gland 5 of double mechanical seal, and be connected and fixed by the stuffing box gland of nut and key and double mechanical seal, the stuffing box gland of double mechanical seal and the hollow shaft of speed reducer rotate synchronously, branch fluid 2 is housed on the support, dividing on the fluid has pressure gauge 3, divides fluid to have oil pipe to be communicated with the support inner chamber, divides fluid to also have crude oil oil pipe 10 to be communicated with the low-pressure cavity of booster jar 8, on this crude oil oil pipe stop valve 11 is arranged, pressure gauge 3 is also arranged on the booster jar, and the hyperbaric chamber of booster jar has lubricant oil oil pipe 9 to be communicated with the lubricant reservoir of double mechanical seal, and the lubricant oil filler opening is arranged on the lubricant oil oil pipe 9.

Described motor reducer can be replaced with direct driving motor, that is: it comprises support 1, oil outlet is arranged on the support, the support upper fixed has double mechanical seal 4, the double mechanical seal upper fixed has direct driving motor 6, the hollow shaft 7 of direct driving motor extend in the stuffing box gland 5 of double mechanical seal, and be connected and fixed by the stuffing box gland of nut and key and double mechanical seal, the stuffing box gland of double mechanical seal and the hollow shaft of direct driving motor rotate synchronously, branch fluid 2 is housed on the support, divide on the fluid pressure gauge 3 is arranged, divide fluid to have oil pipe to be communicated with the support inner chamber, divide fluid to also have crude oil oil pipe 10 to be communicated with the low-pressure cavity of booster jar 8, on this crude oil oil pipe stop valve 11 is arranged, pressure gauge 3 is also arranged on the booster jar, and the hyperbaric chamber of booster jar has lubricant oil oil pipe 9 to be communicated with the lubricant reservoir of double mechanical seal, and the lubricant oil filler opening is arranged on the lubricant oil oil pipe 9.

Claims

1. screw pump high-pressure mechanical seal surface drive, comprise support (1), oil outlet is arranged on the support, it is characterized in that: the support upper fixed has double mechanical seal (4), the double mechanical seal upper fixed has motor reducer (6), the hollow shaft of speed reducer (7) extend in the stuffing box gland (5) of double mechanical seal, and be connected and fixed by the stuffing box gland of nut and key and double mechanical seal, branch fluid (2) is housed on the support, divide on the fluid pressure gauge (3) is arranged, divide fluid to have oil pipe to be communicated with the support inner chamber, divide fluid to also have crude oil oil pipe (10) to be communicated with the low-pressure cavity of booster jar (8), stop valve (11) is arranged on this crude oil oil pipe, pressure gauge (3) is also arranged on the booster jar, the hyperbaric chamber of booster jar has lubricant oil oil pipe (9) to be communicated with the lubricant reservoir of double mechanical seal, and the lubricant oil oil pipe has the lubricant oil filler opening on (9).

2. screw pump high-pressure mechanical seal surface drive, comprise support (1), oil outlet is arranged on the support, it is characterized in that: the support upper fixed has double mechanical seal (4), the double mechanical seal upper fixed has direct driving motor (6), the hollow shaft of direct driving motor (7) extend in the stuffing box gland (5) of double mechanical seal, and be connected and fixed by the stuffing box gland of nut and key and double mechanical seal, branch fluid (2) is housed on the support, divide on the fluid pressure gauge (3) is arranged, divide fluid to have oil pipe to be communicated with the support inner chamber, divide fluid to also have crude oil oil pipe (10) to be communicated with the low-pressure cavity of booster jar (8), stop valve (11) is arranged on this crude oil oil pipe, pressure gauge (3) is also arranged on the booster jar, the hyperbaric chamber of booster jar has lubricant oil oil pipe (9) to be communicated with the lubricant reservoir of double mechanical seal, and the lubricant oil oil pipe has the lubricant oil filler opening on (9).