CN101082333A

CN101082333A - Different diameter

Info

Publication number: CN101082333A
Application number: CN 200710013459
Authority: CN
Inventors: 韩明胜
Original assignee: YOU SHOUHENG
Current assignee: YOU SHOUHENG
Priority date: 2007-01-31
Filing date: 2007-01-31
Publication date: 2007-12-05

Abstract

The invention discloses a different diameter twin cylinder soft piston discharge fluid pump. It includes doff pairs body and under pump barrel which contains under pump barrel, upper oil out valve, under oil inlet valve, under oil out valve, pump under joint and center tube. It has characteristics as that, an upper pump body set above under pump body, upper pump body and under pump body have different diameter. Doff pairs body fixed above upper pump body. Seal capsule body set between upper oil out valve and under oil out valve of under pump body. Upper and lower pump oil joint are set above upper oil out valve. Upper pump body contains upper pump barrel, connecting rod upper joint, pump upper joint, upper piston, soft seal ring and upper oil inlet valve. Soft seal ring is between upper oil inlet valves and pumps upper joint, and set on piston. Upper pump barrel connects to upper oil inlet valve being one body.

Description

Different diameter

Technical field the present invention relates to the positive displacement pump in the pumping unit of a kind of oil field, particularly a kind of different diameter.

Disclosed positive displacement pump in the background technique prior art, generally be to constitute by parts such as pump barrel, plunger, last outlet valve, pump lower contact, following oiling valve, center tubes, because plunger cooperates by interval area with pump barrel and realizes less gap leaking loss, thereby the Spielpassung leakage is big, very easily cause leakage, thereby influenced oil extraction, and has only upstroke lifting liquid in the prior art, pump efficiency is low, also owing to do not possess the sand control function, pump is easy to cause sand holddown phenomenon in the course of the work, its maintenance cost height, and working life is short.

Summary of the invention the objective of the invention is to want to overcome above-mentioned the deficiencies in the prior art, and a kind of improved positive displacement pump is provided, this positive displacement pump pump efficiency height, long service life.

For realizing that the technological scheme that above-mentioned purpose of the present invention adopts is: a kind of different diameter, comprise taking off body is reached by following pump barrel, goes up the lower pump body that outlet valve, following oiling valve, following outlet valve, pump lower contact and center tube constitute, its structural feature is provided with a upper pump casing above lower pump body, upper pump casing is different with the lower pump body internal diameter, takes off the top that body is installed in upper pump casing; Be provided with the sealing utricule between outlet valve on the lower pump body and following outlet valve, pump was crossed oily joint about the top of last outlet valve was provided with; Upper pump casing is by last pump barrel, connecting rod upper connection, pump upper connection, upper plug, soft seal ring and goes up oiling valve and constitute, and the soft seal ring is between last oiling valve and pump upper connection and be enclosed within on the upper plug, and last pump barrel and last oiling valve are connected as a single entity.

Most preferred embodiment of the present invention is to be provided with anti-sand body between upper pump casing and the lower pump body.

Described anti-sand body is to be made of filter screen upper shield, filter screen lower shield, filter screen and fixation clamp, and filter screen set is on filter screen upper shield and filter screen lower shield, and fixation clamp is installed on the lower end of filter screen lower shield.

It is described that to take off body be by taking off box cupling, take off pipe nipple, take off the device upper connection, take off pawl, taking off bar and take off that lower contact constitutes to device, take off box cupling is installed in and take off on the body pipe nipple, take off the device upper connection, take off, take off bar and take off to device lower contact and be positioned at and take off, take off to device lower contact and be installed in and take off on the bar to pipe nipple to pawl.

Another most preferred embodiment of the present invention is that the last oiling valve of upper pump casing is connected on the following pump barrel of lower pump body, the upper plug of upper pump casing is crossed oily joint with the pump up and down of lower pump body and is connected, the sand control body is positioned between upper pump casing and the lower pump body, the filter screen upper shield of its upper end is stuck on the last oiling valve of upper pump casing, the fixation clamp of lower end is fixed on the following pump barrel of lower pump body, take off taking off of body is connected with the pump upper connection of upper pump casing to pipe nipple, take off taking off of body is connected with the connecting rod upper connection of upper pump casing to the device lower contact.

Outlet valve had constituted the lower plunger of lower pump body under pump up and down in the lower pump body was crossed oily joint, upward outlet valve, sealing utricule, center tube reach, the present invention adopts the upper pump casing (also being upper cylinder half) and lower pump body (also promptly playing cylinder) combination of different inner diameters, the last lower plunger series connection of different inner diameters, generally speaking, upper plug is ∮ 38 in the upper pump casing, lower plunger in the lower pump body is ∮ 57, makes that up-down stroke can both the interior liquid of lifting pit shaft.Its working principle is: after positive displacement pump is lowered into oil field pit shaft design attitude, sucker rod connects the disjointed device pawl, in oil pipe, be lowered into assigned position, after the upper end disjointed device success of the interior positive displacement pump of butt shaft, when the lower plunger in sucker rod drives lower pump body is descending, last oiling valve oil-feed, following oiling valve cuts out, last outlet valve cuts out, and following outlet valve is fuel-displaced; When sucker rod drives lower plunger when up, last oiling valve cuts out, following oiling valve oil-feed, and last outlet valve is fuel-displaced, and following outlet valve cuts out, and the to-and-fro motion by lower plunger makes that liquid constantly gives rise to ground in the well thus.When descending, the following oiling valve of lower plunger cuts out, last oiling valve is opened, because the pressure dependence that the heavy foam degree of liquid and pump is set up, can give the descending certain function of lower plunger compensation, overcome the descending resistance between descending oiling valve at present of lower plunger and the following outlet valve, force the liquid between two valves, enter the lower pump body inner chamber, cross oily joint through pump up and down and enter upper plug and import oil pipe into by following outlet valve.

Up, the following oiling valve of lower plunger is under the effect of the up suction of lower plunger, open wide oil-feed, under the effect of compressed liquid gravity between upper plug and the lower plunger, last oiling valve cuts out, last outlet valve is opened under the effect of annular space pressure reduction, and liquid imports oil pipe into by upper plug.

Because positive displacement pump adopts two-part up and down, top is that last pump barrel cooperates with upper plug, the bottom is that pump barrel cooperates with lower plunger down, last lower plunger reducing series connection all-in-one-piece structure, solved the Spielpassung problem of pump barrel and plunger, upper pump casing has designed the ring type soft seal ring that compensates automatically and has cooperated with upper plug in the pump housing, make the sealing compensation system of upper pump casing reach gapless sealing state; Lower pump body designed self-sealed compensated with let out the soft seal utricule that carries function and cooperate with long pump barrel, thereby moment seal when having reached up, improved pump efficiency.

Advantage of the present invention and effect are:

1, pump efficiency height.Owing to adopted the new technology of gap-free sealed and self-styled automatic compensation, its up-down stroke all can lifting liquid, under identical parameters situations such as fluid supply capacity, can improve pump efficiency 10-20%.

2, long service life, user cost is low.Because upper pump casing and lower pump body have been taked the compensation mechanism of soft tissue seal, its wear resistance is good, and can repeat to repair and use, thereby life cycle is long, because of having reduced maintenance frequency,, can make positive displacement pump reach for a long time running state efficiently so reduced user cost.

3, has sand control capability.Conventional pumps is because the difference of Spielpassung, shake out in impurity that operating tool string carries and the well and be easy to cause holddown, the present invention has played good sand control effect because all corresponding soft sealing structure of having taked of last lower pump body has been created the good condition of strike-ofing for positive displacement pump.

4, the present invention has practicability widely, can use in various types of wells.

Description of drawings Fig. 1 is the structural representation of the embodiment of the invention.

Fig. 2 takes off the body structure schematic representation among Fig. 1.

Fig. 3 is the structural representation of upper pump casing among Fig. 1.

Fig. 4 is a sand control body structure schematic representation among Fig. 1.

Fig. 5 is a lower pump body structural representation among Fig. 1.

Fig. 6 is the enlarged view of sealing utricule among Fig. 5.

Embodiment is described below in conjunction with the concrete example of implementing for describing the present invention in detail.

As seen from Figure 1, the present invention contains lower pump body 4, takes off body 1, upper pump casing 2, and upper pump casing 2 is positioned at the top of lower pump body 4, and upper pump casing 2 is different with lower pump body 4 internal diameters, take off the top that body 1 is installed in upper pump casing 2, between upper pump casing 2 and lower pump body 4, also be provided with anti-sand body 3.

It is shown in Figure 2 that to take off body 1 be by taking off box cupling 5, take off pipe nipple 6, take off device upper connection 7, take off pawl 9, taking off bar 12 and take off device lower contact 14 is constituted, take off box cupling 5 is installed in and take off on the body pipe nipple 6, take off device upper connection 7, take off, take off bar 12 and take off device lower contact 14 is positioned at and take off pipe nipple 6 to pawl 9, taking off outside to pawl 9 is with and takes off pawl sheath 8, take off stop collar 10 also is housed on the bar 12, be used for limiting and take off pawl 9, take off device lower contact 14 is installed in and take off, stage clip 11 also is housed and on taking off bar 12 by cap 13 on the bar 12.

Upper pump casing 2 shown in Figure 3 is by last pump barrel 18, connecting rod upper connection 15, pump upper connection 16, upper plug 17, soft seal ring 21 reaches goes up oiling valve 28 formations, soft seal ring 21 is between last oiling valve 28 and pump upper connection 16 and be enclosed within on the upper plug 17, last pump barrel 18 is connected as a single entity with last oiling valve 28, the outside of seal ring 21 also is provided with spacer ring 20 and sealing sheath 19, last oiling valve 28 is by last oiling valve body 22, last oiling valve ball 23, last oiling valve seat 24, last oiling valve seat pressure cap 25, last oiling valve guard shield 27 constitutes, and will go up oiling valve guard shield 27 with connecting screw 26 and connect together with last oiling valve body 22.

Anti-sand body 3 shown in Figure 4 is to be made of filter screen upper shield 29, filter screen 30, filter screen lower shield 31 and fixation clamp 33, filter screen 30 is enclosed within on filter screen upper shield 29 and the filter screen lower shield 31, fixation clamp 33 is installed on the lower end of filter screen lower shield 31, is fixed on the filter screen lower shield 31 with fixing bolt 32.

Lower pump body 4 shown in Figure 5 be by following pump barrel 34, go up outlet valve 56, down oiling valve 53, down outlet valve 54, down pump joint 48, center tube 40, sealing utricule 55 and up and down pump cross oily joint 35 and constitute, pump is crossed the top that oily joint 35 is located at outlet valve 56 up and down, sealing utricule 55 is located between the last outlet valve 56 and following outlet valve 54 of lower pump body 4, constitute by sealing capsule 43, soft seal ring 42 and capsule guard shield 41, capsule guard shield 41 is fixed on seal ring 42 and sealing capsule 43 on the center tube 40, as shown in Figure 6.Last outlet valve 56 is to be made of last oil-release valve cover 36, valve ball 37, valve seat 38, last outlet valve fixed base 39, following outlet valve 54 is to be made of oil pump outlet valve seat pressure cap 47 under oil pump outlet valve cover 44, following oil pump outlet valve ball 45, following oil pump outlet valve seat 46 reach down, and following oiling valve 53 is to be made of oil pump inlet valve seat pressure cap 52 under oil pump inlet valve cover 49, following oil pump inlet valve ball 50, following oil pump inlet valve seat 51 reach down.Pump is crossed oily joint 35 up and down, upward outlet valve 56, sealing utricule 55, following outlet valve 54 and center tube 40 have constituted the lower plunger assembly.

The last oiling valve 28 of upper pump casing 2 is connected on the following pump barrel 34 of lower pump body 4, the upper plug 17 of upper pump casing 2 is connected with the oily joint 35 of crossing up and down of lower pump body 4, anti-sand body 3 is between upper pump casing 2 and lower pump body 4, the filter screen upper shield 29 of its upper end is stuck on the last oiling valve 28 of upper pump casing 2, the fixation clamp 33 of lower end is fixed on the following pump barrel 34 of lower pump body 4, take off taking off of body 1 is connected with the pump upper connection 16 of upper pump casing 2 to pipe nipple 6, take off taking off of body 1 is connected with the connecting rod upper connection 15 of upper pump casing 2 to device lower contact 14.

Claims

1, a kind of different diameter, comprise and take off to body (1) and by following pump barrel (34), go up outlet valve (56), oiling valve (53), the lower pump body (4) that constitutes of outlet valve (54), pump lower contact (48) and center tube (40) down down, it is characterized in that being provided with a upper pump casing (2) in the top of lower pump body (4), upper pump casing (2) is different with lower pump body (4) internal diameter, takes off the top that body (1) is installed in upper pump casing (2); Be provided with sealing utricule (55) between the last outlet valve (56) of lower pump body (4) and following outlet valve (54), pump was crossed oily joint (35) about the top of last outlet valve (56) was provided with; Upper pump casing (2) is by last pump barrel (18), connecting rod upper connection (15), pump upper connection (16), upper plug (17), soft seal ring (21) and goes up oiling valve (28) formation, soft seal ring (21) is positioned between oiling valve (28) and the pump upper connection (16) and is enclosed within on the upper plug (17), and last pump barrel (18) is connected as a single entity with last oiling valve (28).

2,, it is characterized in that between upper pump casing (2) and lower pump body (4), being provided with anti-sand body (3) according to the described different diameter of claim 1.

3, according to the described different diameter of claim 2, it is characterized in that anti-sand body (3) is to be made of filter screen upper shield (29), filter screen lower shield (31), filter screen (30) and fixation clamp (33), filter screen (30) is enclosed within on filter screen upper shield (29) and the filter screen lower shield (31), and fixation clamp (33) is installed on the lower end of filter screen lower shield (31).

4, according to claim 1 or 2 described different diameters, the last oiling valve (28) that it is characterized in that upper pump casing (2) is connected on the following pump barrel (34) of lower pump body (4), the upper plug (17) of upper pump casing (2) is crossed oily joint (35) with the pump up and down of lower pump body (4) and is connected, the filter screen upper shield (29) of anti-sand body (3) upper end is stuck on the last oiling valve (28) of upper pump casing (2), the fixation clamp of lower end (33) is fixed on the following pump barrel (34) of lower pump body (4), take off taking off of body (1) is connected with the pump upper connection (16) of upper pump casing (2) to pipe nipple (6), take off taking off of body (1) is connected with the connecting rod upper connection (15) of upper pump casing (2) to device lower contact (14).