CN2479249Y

CN2479249Y - Forced-production deep-pumping pump

Info

Publication number: CN2479249Y
Application number: CN 01220375
Authority: CN
Inventors: 蒋生健; 刘正华; 李勇; 孙宪利
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2001-04-29
Filing date: 2001-04-29
Publication date: 2002-02-27
Anticipated expiration: 2011-04-29

Abstract

The utility model relates to a deep-pumping pump is adopted to reinforce that is used for oil well production especially low liquid level oil well production, always holds, cup-shaped valve always holds and the butterfly valve always holds three major parts by the annular valve and constitutes. The oil well pump has the advantages that the valve cover (5) arranged on the annular valve assembly, the annular valve (4), the upper and lower righting rings (12) and (14) on the cup-shaped valve assembly and the umbrella-shaped cover (19) on the butterfly valve are respectively provided with the fluid circulation hole and the sand storage groove, so that the fluid flow resistance can be reduced, the air lock phenomenon and the sand prevention can be eliminated, and the filling degree and the pump efficiency of the pump are improved. The valve and valve seat of the oil well pump are made of hard alloy, and the oil well pump has high machining precision and long service life, and is especially suitable for low-liquid-level, high-oil-gas-ratio and low-yield oil wells and heavy oil wells.

Description

A kind of deep oil well pump of adopting by force

The utility model relates to a kind of particularly downhole hardware of low liquid level oil well production of oil well production that is used for.

At present, the most of oil fields of China have entered the exploitation middle and later periods, and along with the decline of stratum energy, formation pressure and well fluid level constantly reduce, and output descends significantly.For improving low liquid level stripper well rate of oil production, on-the-spot common employing is amplified producing pressure differential, is deepened measures such as pump is hung, raising lifting rate.Amplifying producing pressure differential can cause flowing bottomhole pressure (FBHP) to reduce on the one hand, the dissolving tolerance at Pump Suction Nozzle place is increased, the filling index of pump reduces, can form gas lock and liquid hit phenomenon when serious, also can cause the shaft bottom to shake out seriously on the other hand, make the leakage of oil well pump valve, pump detection period shortens, and cost of crude oil production increases.Deepen pump and hang then and can make radial deformation of barrel strengthen owing to fluid column weight increases, thereby the matching gap of pump barrel and plunger is increased, wastage increases, and pump efficiency reduces, and is helpless to the raising of oil well output and the improvement of production status.

The purpose of this utility model is to provide a kind of can effectively improve low liquid level stripper well production status, improve crude output adopt deep oil well pump by force.

The purpose of this utility model be achieved in that this kind oil well pump by annular valve assembly, piston and cup valve assembly and disc valve assembly three parts and reducer fitting, go up connecting rod and form.Wherein, the annular valve assembly is made of decompression pipe collar, annular valve, valve bonnet, " O " shape seal ring, elastic circlip, valve base sealing body; Piston and cup valve assembly are made of pump barrel, linkage connector, lower link, the upper and lower centering ring of piston, piston, cup valve valve seat, valve pocket, cup valve; The disc valve assembly is made of dish valve pipe collar, canopy hood, valve rod, spring, tube coupling, disc valve, disc valve valve seat, disc valve working barrel, sub-coupling.This oil pumping pump structure and assembling feature are as follows: annular valve assembly, " O " shape seal ring, elastic circlip are enclosed within on the seal section of annular valve seal, the valve bonnet cover annular valve and is tightened with valve base sealing body make-up, and the valve base sealing body is stuck in the pipe collar jump ring groove by jump ring and is connected with the decompression pipe collar; Piston and cup valve assembly, piston upper and lower end connect the upper and lower centering ring of piston respectively by screw thread, be provided with the cup valve valve seat in the valve seat groove of centering ring under the piston, and be threaded with valve pocket, the lower link upper end is threaded with back of the body cap and linkage connector, lower end and cup valve make-up are tightened, and above assembly parts is packed in the pump barrel; Disc valve assembly, valve rod and disc valve center hole make-up are tightened, disc valve working barrel lower end and sub-coupling make-up are tightened, the upper end is provided with disc valve valve seat, tube coupling and disc valve, valve rod, spring assembly successively, canopy hood and disc valve working barrel make-up are tightened, and dish valve pipe collar and disc valve working barrel upper end make-up are tightened; Pass the last connecting rod upper and lower end at annular valve assembly center and tighten with reducer fitting and linkage connector make-up respectively, decompression pipe collar lower end and pump barrel upper end make-up are tightened, and the disc valve pipe collar connects with pump barrel lower end make-up.During use, will connect docking adapter in the reducer fitting of this oil well pump upper end, with oil pump tubular column down to designed depth.In the pumping well production process, piston pumps with rod string in pump barrel.During down stroke, the km head of liquid acts on the annular valve on the oil pipe, annular valve cuts out, the while descent of piston, and the pump barrel space between piston and annular valve increases, the following pump barrel space of annular valve forms low pressure area, disc valve cuts out rapidly under the effect of elastic force, and toward descending, promptly open slightly by cup valve for connecting rod, linkage connector promotes descent of piston immediately, and the fluid in the pump barrel enters the space that piston is abdicated by cup valve rapidly.Because whole pump barrel space is in low-pressure state, and be in same pressure system, thereby reduced between piston and pump barrel greatly, the leakage between valve and valve seat, simultaneously, this mechanism can form gas channel rapidly, gas is discharged piston rapidly, avoids Piston Compression gas, eliminates the influence of gas to pump; During upstroke, connecting rod is up, and cup valve cuts out and be with piston stroking upward rapidly, pump barrel space between piston and annular valve reduces, and pressure increases, when pressure during greater than head of liquid, annular valve is opened, the above fluid of piston enters in the oil pipe more than the oil well pump by annular valve, simultaneously, because piston stroking upward, pump barrel space between piston and elastic force disc valve increases, pressure reduces, and fluid backs down the elastic force disc valve under the effect of oil jacket annular space pump intake pressure, enters in the space that piston abdicates.So move in circles, liquid (oil), gas fluid-mixing are constantly extracted ground out, thereby can prevent gas to be detained in pump and produce gas lock.In addition, because the canopy hood diameter is bigger, can block oil outlet, like this, if having sand setting to fall more than the elastic force dish valve, when running into canopy hood, canopy hood will change sand setting moving direction, sand setting is sunken to the canopy hood oil outlet with in the groove that forms with the valve working barrel of getting out of a predicament or an embarrassing situation, thereby unlikely sink in disc valve and the valve seat the and influence sealing of valve, thereby reaches the purpose of raising pump efficiency.

The utility model is owing to adopted ball valve, elastic valve, three kinds of pump valve structures of mechanical valve, switch is timely, sealing is reliable, have to adopt by force and take out function deeply, because its filler opening Flow area is big, and has unique gas flow channel and deposit the sand launder structure, flow resistance is little, and can eliminate gas lock phenomenon and sand control, improve the full level and the pump efficiency of pump.The valve of this kind oil well pump and valve seat all adopt cemented carbide to make and the machining accuracy height, and long service life is particularly suitable for using in low liquid level, high oil-gas ratio stripper well and thick oil well.

Fig. 1 is a general structure schematic representation of the present utility model; Fig. 2, Fig. 3 are respectively the front view and the A-A sectional drawing thereof of canopy hood.

Below in conjunction with accompanying drawing enforcement of the present utility model is described further.

As shown in Figure 1, the utility model is made of reducer fitting 1, upper and lower connecting rod 2,11, decompression pipe collar 3, annular valve 4, valve bonnet 5, " O " shape seal ring 6, elastic circlip 7, valve base sealing body 8, pump barrel 9, linkage connector 10, the upper and lower centering ring 12,14 of piston, piston 13, cup valve valve seat 15, valve pocket 16, cup valve 17, dish valve pipe collar 18, canopy hood 19, valve rod 20, spring 21, tube coupling 22, disc valve 23, disc valve valve seat 24, disc valve working barrel 25, sub-coupling 26.Wherein, decompression pipe collar 3 is the pipe that a upper and lower end is respectively equipped with box pipe thread made in Great Britain, and the upper end Gewindefreistiche is wide, and its below is a long inclined-plane, and the inclined-plane is following to be the cylndrical surface, and a square jump ring groove is arranged at the bottom, cylndrical surface.Annular valve 4 tops are cylindrical, and the bottom is isometrical sphere shape, and its center is the connecting rod through hole, and sidecar has the equidistant square sand launder of depositing of twice in the through hole.Valve bonnet 5 is the semicircle barrel shaped structure, and end face central authorities are drilled with tie rod holes, and side wall upper part mills out three square oil outlets that are uniformly distributed along the circumference, and a long inclined-plane is arranged at the bottom, worn-out mouthful of bottom surface, and sidecar has internal thread in it.Valve base sealing body 8 also is a heavy wall semicircle barrel shaped structure, worn-out mouthful of end face, a worn-out mouthful inboard is the circular arc chamfer surface, and grind out potted line, periphery upper end car has outside thread, the middle part is provided with two " O " shape seal grooves and a square jump ring groove, and the bottom is milled with three square oil inlet holes that are uniformly distributed along the circumference, and bottom surface central authorities are drilled with tie rod holes.Linkage connector 10 is for not isometrical cylindrical body, and is up big and down small, and there are two screws that communicate at the center, and last bore dia is bigger, and following bore dia is less.To be semicircle barrel-shaped for centering ring 12 on the piston, and end face central authorities are drilled with circular hole, and side wall upper part mills out three square oil outlets that are uniformly distributed along the circumference, and the bottom car has outside thread, and the bottom is worn-out mouthful.It is barrel-shaped that centering ring 14 also is semicircle under the piston, internal diameter is less relatively, and end face central authorities are provided with tie rod holes, the step surface that sidewall has four diameters not wait, top bar and be milled with three oil outlets that are uniformly distributed along the circumference on the periphery, second step periphery car has outside thread, and the 3rd step periphery diameter maximum is milled with on it and deposits sand launder together, the 4th step periphery diameter and second step periphery equal diameters, which is provided with outside thread, the bottom surface is worn-out mouthful, and inwall is milled with the valve seat groove.Cup valve 17 is beaker shape, and is up-small and down-big, and the center car has interior threaded hole.Canopy hood 19 is a rim of a cup double-deck cup-shaped structure (as shown in Figure 2) down, end face is umbrella shape, its internal portioning layer center is drilled with circular hole, and the center hole outside is milled with three and is communicated with subtriangular oil inlet hole with it, and three square oil outlets are uniformly distributed along the circumference on the interlayer upper side.Disc valve 23 is dish, and its bottom outer surface is a hemisphere, and the hemisphere top face is cylindric, is drilled with the interior threaded hole of certain depth from top to bottom along the cylindrical body center line.

Claims

1, a kind of deep oil well pump of adopting by force, by reducer fitting (1), on, lower link (2), (11), decompression pipe collar (3), annular valve (4), valve bonnet (5), " O " shape seal ring (6), elastic circlip (7), valve base sealing body (8), pump barrel (9), linkage connector (10), on the piston, following centering ring (12), (14), piston (13), cup valve valve seat (15), valve pocket (16), cup valve (17), dish valve pipe collar (18), canopy hood (19), valve rod (20), spring (21), tube coupling (22), disc valve (23), disc valve valve seat (24), disc valve working barrel (25), following sub-coupling (26) is formed, it is characterized in that: " O " shape seal ring (6), elastic circlip (7) is enclosed within on the seal section of annular valve seal (8), valve bonnet (5) is covering annular valve (4) and is tightening with valve base sealing body (8) make-up, valve base sealing body (8) is stuck in pipe collar (3) the jump ring groove by jump ring (7) and is connected with pipe collar (3): on the piston (13), the lower end connects on the piston respectively by screw thread, following centering ring (12), (14), be provided with cup valve valve seat (15) in the valve seat groove of centering ring under the piston (14), and be threaded with valve pocket (16), the lower link upper end is threaded with back of the body cap and linkage connector (10), and lower end and cup valve (17) make-up is tightened; Valve rod (20) is tightened with disc valve (23) center hole make-up, disc valve working barrel (25) lower end and sub-coupling (26) make-up are tightened, the upper end is provided with disc valve valve seat (24), tube coupling (22) and disc valve (23), valve rod (20), spring assembly successively, canopy hood (19) is tightened with disc valve working barrel (25) make-up, and dish valve pipe collar (18) is tightened with disc valve working barrel (25) upper end make-up; Tighten with reducer fitting (1) and linkage connector (10) make-up respectively last connecting rod (2) lower end, and decompression pipe collar (3) lower end and pump barrel (9) upper end make-up are tightened, and disc valve pipe collar (18) connects with pump barrel (9) lower end make-up.

2, the deep oil well pump of adopting by force according to claim 1, it is characterized in that: decompression pipe collar (3) is the pipe that a upper and lower end is respectively equipped with box pipe thread made in Great Britain, and the upper end Gewindefreistiche is wide, and its below is a long inclined-plane, the inclined-plane is following to be the cylndrical surface, and the square jump ring groove of a circle is arranged at the bottom, cylndrical surface.

3, the deep oil well pump of adopting by force according to claim 1 is characterized in that: annular valve (4) top is cylindrical, and the bottom is isometrical sphere shape, and its center is the connecting rod through hole, and sidecar has the equidistant square sand launder of depositing of twice in the through hole.

4, the deep oil well pump of adopting by force according to claim 1, it is characterized in that: valve base sealing body (8) is heavy wall semicircle barrel shaped structure, end face is uncovered, a worn-out mouthful inboard is the circular arc chamfer surface, and grind out potted line, and periphery upper end car has outside thread, and the middle part is provided with two " O " shape seal grooves and a square jump ring groove, the bottom is milled with three square oil inlet holes that are uniformly distributed along the circumference, and bottom surface central authorities are drilled with tie rod holes.

5, the deep oil well pump of adopting by force according to claim 1, it is characterized in that: centering ring under the piston (14) is the semicircle barrel shaped structure, internal diameter is less relatively, end face central authorities are drilled with tie rod holes, the step surface that sidewall has four diameters not wait, top bar and be milled with three oil outlets that are uniformly distributed along the circumference on the periphery, second step periphery car has outside thread, the 3rd step periphery diameter maximum, be milled with on it and deposit sand launder together, the 4th step periphery diameter and two step surface equal diameters, on it also car outside thread is arranged, the bottom surface is worn-out mouthful, and inwall is milled with the valve seat groove.

6, the deep oil well pump of adopting by force according to claim 1, it is characterized in that: canopy hood (19) is rim of a cup double-deck cup-shaped structure down, end face is umbrella shape, its internal portioning layer center is drilled with circular hole, the center hole outside be milled with three be communicated with it, subtriangular oil inlet hole, three square oil outlets are uniformly distributed along the circumference on the wall.