CN2688926Y - Fracturing and acidizing well cementing pumps - Google Patents

Abstract

The utility model discloses a fracturing and acidizing well cementing pump, chiefly comprises a power end and a fluid end. The utility model is characterized in that a retarding mechanism of the power end is arranged at the external side of the pump case. By adopting a gear pair to reduce the speed, the pump case structure is simplified, the pump volume is reduced, and the fracturing and acidizing well cementing pump is adapted for the arrangement of the vehicle table. The oil ports on the two ends of the bent axle of the power end are provided with filings sucking sleeves. The tiny iron filings in the fluid oil can be removed, and the abrasion of the lubricating component is reduced. A valve body at the fluid end adopts an integral type. A sealing element is sulfurized with the valve body into integration. The weight and the effective force of the motion of the valve body are lightened. The action of the pump valve is flexible, and the service life of the pump valve is further improved. The utility model is especially adapted for the fracturing and acidizing well cementing work of the arrangement of the vehicle table of the oil filed, which can be also used for conveying other liquid.

Description

Fracture acidizing well cementation pump

Technical field:

The utility model relates to industrial reciprocating pump, particularly pressure break, acidifying, the well cementation pump of oilfield use.

Background technique:

Pressure break, acidifying, well cementation pump that oilfield uses, generally include power end and fluid end, the power that transmits from motor, after the reducing gear of power end slows down, to rotatablely move by connecting rod and to become the plunger that to-and-fro motion passes to fluid end, to-and-fro motion by plunger makes the pump valve of fluid end open or close, and finishes the suction and the discharge work of liquid.The reducing gear majority of the pressure break of oil field use at present, acidifying, well cementation pump places pump housing inside, thereby the volume of pump is bigger, be not suitable for particularly two-shipper double pump ride layout of ride, and the pump case manufacturing process is also complicated; The pump valve valve body is a composite structure, with links such as screw-nuts they is fixed together after promptly valve body and Sealing are made respectively, and the structure heaviness, inertia impact is big, and the pump valve life-span is short; In addition, in the operation process of parts, owing to reasons such as wearing and tearing, often make impurity such as there being some iron filings in the lubricant oil, these impurity will increase the wearing and tearing of lubricated part conversely, reduce the working life of parts.

Summary of the invention:

The purpose of this utility model is in order to overcome the above-mentioned deficiency of this pump, and it is less to propose a kind of volume, is convenient to manufacturing, is fit to ride is arranged, the life-span is long pressure break, acidifying, well cementation pump.

For achieving the above object, the technical solution adopted in the utility model is: pressure break, acidifying, well cementation pump still mainly are made up of power end (2) and fluid end (1), the crosshead (9) that power end (2) mainly comprises pump case (12), reducing gear (6), bent axle (4) and the connecting rod (3) that links with it, links with connecting rod (3); Fluid end (1) mainly comprises plunger (10), clack box (13), suction valve (18) and the expulsion valve (19) that links with crosshead (9); Between power end (2) and fluid end (1), isolating seal device (11) is arranged; Of the present utility model being characterised in that: reducing gear (6) is to place outside the pump case (12), it realizes slowing down by the gear pair on driving shaft (14) and the driven shaft (15), driving shaft (14) links by the flange plate (7) of spline and line shaft, driven shaft (15) connects with bent axle (4) by spline, reducing gear (6) places casing (8), and casing (8) is fixed together by the pump case (12) of bolt (5) with power end (2); The suction valve (18) of fluid end (1) and expulsion valve (19) are formed by integrated type valve body (20) and valve seat (22), and Sealing (21) vulcanizes in one with valve body (20); Lubricating oil duct mouth at bent axle (4) two ends is provided with inhales bits covers (16), and it is fixed on the end of bent axle (4) with snap ring (17).

The utility model has the advantages that:

1. power end adopts pump to slow down outward, makes pump structure obtain simplifying, and has simplified the manufacturing process of pump case, and the volume of pump reduces, and is suitable for ride and arranges.

2. reducing gear adopts gear transmission, and bearing capacity is strong, the mechanical efficiency height.

3. the crank lubricating oil duct junction is provided with and inhales the bits cover, can remove the small iron filings in the lubricant oil, reduces the wearing and tearing of each lubricated part, has improved the working life of parts.

4. the valve body of pump valve adopts integrated type, and Sealing and valve body are sulfided into one, have deducted the mounting fixing parts of valve disc and Sealing, alleviated valve weight and to the impact of valve seat, and reduced the inertial force that valve disc moves, and make the pump valve flexible movements, further improved the working life of pump valve.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the utility model power end reducing gear schematic representation;

Fig. 3 is a power end crankshaft structure schematic representation;

Fig. 4 is the utility model fluid end structural representation;

Fig. 5 is a fluid end pump valve structural representation.

Embodiment:

Pressure break, acidifying, well cementation pump mainly are made up of power end (2) and fluid end (1), the crosshead (9) that power end (2) mainly comprises pump case (12), reducing gear (6), bent axle (4) and the connecting rod (3) that links with it, links with connecting rod (3); Fluid end (1) mainly comprises plunger (10), clack box (13) and suction valve (18) and the expulsion valve (19) that links with crosshead (9); Between power end (2) and fluid end (1), there is isolating seal device (11) that driving part and waterpower are partly separated.Reducing gear (6) places outside the pump case (12), and it realizes slowing down by the helical gear pair on driving shaft (14) and the driven shaft (15).Power is imported from flange plate (7), be delivered to driving shaft (14) by the rectangular spline on the flange plate (7), after the helical gear pair on driving shaft (14) and the driven shaft (15) slows down, by the involute splines on the driven shaft (15) power is passed to bent axle (4) and the connecting rod (3) that links with it, the straight line motion that the crosshead (9) that links with connecting rod (3) is converted rotatablely moving of bent axle (4) passes to plunger (10).The oil duct junction at bent axle (4) two ends is equipped with the suction bits covers (16) that are used for removing the tiny iron filings that deoil, and this is inhaled bits covers (16) and adopts the magnet manufacturing, is fixed in bent axle (4) two ends with snap ring (17).The casing (8) of reducing gear (6) is fixed together by the pump case (12) of bolt (5) with power end (2).Pump case (12) and casing (8) all adopt the steel plate assembly welding to form, and bent axle (4) adopts forging structure, and the gross weight of pump is alleviated.The spray coating alloy processing is carried out on plunger (10) surface, to improve the wear resistance and the corrosion resistance on surface.The suction valve (18) of fluid end (1) is identical with expulsion valve (19) structure, all is made up of valve body (20) and valve seat (22), and valve body (20) adopts integrated type, and promptly Sealing (21) is sulfided into one with valve body (20).When plunger (10) when moving right, expulsion valve (19) cuts out, and suction valve (18) is opened, and liquid is inhaled in the cylinder, and when plunger (10) during to left movement, expulsion valve (19) is opened, and suction valve (18) cuts out, and highly pressurised liquid is discharged from.

Claims (3)

1. fracture acidizing well cementation pump, mainly form by moved end (2) and fluid end (1), power end (2) mainly comprises pump case (12), reducing gear (6), bent axle (4) and the connecting rod (3) that links with it, the crosshead (9) that links with connecting rod (3), fluid end (1) mainly comprises the plunger (10) that links with crosshead (9), clack box (13), suction valve (18) and expulsion valve (19), between power end (2) and fluid end (1), isolating seal device (11) is arranged, it is characterized in that: reducing gear (6) is to place outside the pump case (12), it realizes slowing down by the gear pair on driving shaft (14) and the driven shaft (15), driving shaft (14) links by the flange plate (7) of spline and line shaft, driven shaft (15) connects with bent axle (4) by spline, reducing gear (6) places casing (8), and casing (8) is fixed together by the pump case (12) of bolt (5) with power end (2).

2. fracture acidizing well cementation pump according to claim 1, it is characterized in that: the suction valve (18) of fluid end (1) and expulsion valve (19) are formed by integrated type valve body (20) and valve seat (22), and Sealing (21) is sulfided into one with valve body (20).

3. fracture acidizing well cementation pump according to claim 1 is characterized in that: the oil duct junction at bent axle (4) two ends is provided with inhales bits covers (16), and it is fixed on the end of bent axle (4) by snap ring (17).