CN201184295Y

CN201184295Y - Novel plunger type water injection pump hydraulic end valve seat

Info

Publication number: CN201184295Y
Application number: CNU200820063099XU
Authority: CN
Inventors: 祝效华; 邓福成; 童华
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2008-04-18
Filing date: 2008-04-18
Publication date: 2009-01-21
Anticipated expiration: 2018-04-18

Abstract

The utility model relates to a novel hydraulic end valve seat of a plunger water injection pump, which can change the flow channel of inlet holes to enable the flow field to be uniform, improve the force bearing condition on a pump spring and improve the utilization efficiency of the pump. The novel valve seat is characterized in that the inlet holes of the valve seat have equal diameter along the hole depth, and are uniformly distributed around the central axis of the valve seat at an equal angle; and the radius of the inlet holes of the hydraulic end valve seat gradually increases from bottom to top along the valve seat shaft at a liquid suction end. The valve seat can reduce non-uniform loads on suction valve discs, improve the force bearing condition on the spring, prolong the service life of the hydraulic end valve seat, and improve the work efficiency, and has the advantages of simple structure, easy assembly and high reliability. The hydraulic end valve seat can be used for the plunger water injection pump for water injection and oil production of wells.

Description

A kind of novel plunger-type water injection pump fluid end valve seat

Technical field

The utility model relates to a kind of novel plunger-type water injection pump fluid end valve seat that is used for the petroleum industry water flood recovery.

Background technique

Along with the continuous increase of oilfield exploitation time, many oil fields have entered the exploitation later stage.In order to realize the stable high yield of crude oil, need to adopt the water flooding regime exploitation mostly.Along with the increase gradually of water injection rate, more and more higher to the requirement of water injection pump stability.The most frequently used structural type of water injection pump fluid end is in the petroleum industry: pump head, supported flange, valve seat, suction spring, suction spring seat, suction valve disc, discharge spring, discharge spring seat, discharge valve block, guide spiro rod etc.In the plunger type water injection pump, the easiest inefficacy is to suck spring, operating time only maintains between several days to 40 days, behind the spring failure, often need to drop into great amount of manpower and material resources and carry out irregular maintenance, sometimes even need the after sales service personnel of producer arrive on-the-spot installation specially, both increase the after sales service expense, incured loss through delay the normal operation of pump again.Through a large amount of hydrodynamic analysis research, recognize that sucking spring is subjected to unbalanced reciprocal alternate load effect, and early failue easily takes place.Lost efficacy for spring reduces, and then the inlet hole runner was improved, uniform flow field, balance fluid reduce the spring failure that causes owing to fluid impact in the suction process to the impact of suction valve disc, prolong the working life of spring, improve the utilization efficiency of pump.

Summary of the invention

The purpose of this utility model is: in order to overcome existing plunger type water injection pump fluid end valve seat non-symmetrical load owing to uneven fluid impact causing spring in suction process, prolong spring working life, improve the utilization efficiency of pump, a kind of novel plunger-type water injection pump fluid end valve seat of special proposition.

In order to achieve the above object, the utility model is by the following technical solutions: a kind of novel plunger-type water injection pump fluid end valve seat, be fixed on valve seat in the pump head by supported flange, its structure characteristic is: the single inlet hole 11 of fluid end valve seat 5 is along the hole depth equal diameters, and distributes around the even equal angles of the central axis of valve seat 5; Valve seat 5 inlet holes 11 radiuses axially increase along valve seat 5 from bottom to top gradually at the liquid sucting port end.

The beneficial effects of the utility model are: changed the inlet hole runner, made even flow fieldization; Reduce the uneven load on the suction valve disc, improve the force-bearing situation on the spring, prolong the working life of fluid end, increase work efficiency; The utility model is simple in structure, assembling is easy, reliability is high, can be used in the plunger type water injection pump of flushing oil recovery.

Description of drawings

Fig. 1 is the structural representation of the utility model plunger type water injection pump fluid end.

Among Fig. 1: 1 pump head; 2 suck spring; 3 inhalation valve spring seats; 4 suction valve discs; 5 valve seats; 6 discharge valve block; 7 discharge spring; 8 expulsion valve spring seats; 9 guide spiro rods; 10 supported flanges; 14 liquid sucting ports.

Fig. 2 is the utility model plunger type water injection pump fluid end valve seat schematic representation.

Among Fig. 2: 11 inlet holes; 12 tap holes; The inlet hole of 13 diameter minimums.

Fig. 3 is a known plungers formula water injection pump fluid end valve seat schematic representation.

Embodiment

As shown in Figure 1, the utility model plunger type water injection pump fluid end device is made up of pump head 1, suction spring 2, inhalation valve spring seat 3, suction valve disc 4, valve seat 5, discharge valve block 6, discharge spring 7, expulsion valve spring seat 8, guide spiro rod 9, supported flange 10.Inhalation valve spring seat 3, valve seat 5 are fixed in the pump head 1 by supported flange 10; In the suction side, suck spring 2 and connecting suction valve disc 4, and make suction valve disc 4 rely on pump valve 5 suction end faces by elastic force, the other end that sucks spring 4 withstands on the inhalation valve spring seat 3; At exhaust end, discharge spring 7 and connecting discharge valve block 6, and make discharge valve block 6 rely on pump valve 5 discharge end faces by elastic force, discharge spring 7 the other ends and withstand on the guide spiro rod 9.

As shown in Figure 2, the single inlet hole 11 of the utility model plunger type water injection pump fluid end valve seat device 5 is along the hole depth equal diameters, and distribute around the even equal angles of the central axis of valve seat 5, inlet hole 11 dwindles to liquid sucting port 14 direction internal orifice dimension equal difference from the hole, and wherein the inlet hole 13 of valve-seat diameter minimum is placed in from water injection pump fluid end liquid sucting port 14 nearest.

When imbibition, under the constant situation of flow, liquid effects is on the valve seat of this patent, the inlet hole near from liquid sucting port is little, has slowed down the inflow of liquid, makes liquid ring increase inlet hole around the liquid container of valve seat gradually from radius from bottom to top and flows into, flow velocity is milder, even flow fieldization; Make the power relative equilibrium that acts on the suction valve disc, be not partial to, valve block moves along the inner chamber pressure spring of inhalation valve spring seat, makes the spring pressurized even.

Claims

1. novel plunger-type water injection pump fluid end valve seat, be fixed on valve seat in the pump head by supported flange, it is characterized in that: the single inlet hole (11) of fluid end valve seat (5) is along the hole depth equal diameters, and distributes around the even equal angles of the central axis of valve seat (5); Valve seat (5) inlet hole (11) radius axially increases along valve seat (5) from bottom to top gradually at the liquid sucting port end.