CN202882857U - Self-controlled oil well casing gas recovery device - Google Patents
Self-controlled oil well casing gas recovery device Download PDFInfo
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- CN202882857U CN202882857U CN 201220509199 CN201220509199U CN202882857U CN 202882857 U CN202882857 U CN 202882857U CN 201220509199 CN201220509199 CN 201220509199 CN 201220509199 U CN201220509199 U CN 201220509199U CN 202882857 U CN202882857 U CN 202882857U
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Abstract
Disclosed is a self-controlled oil well casing gas recovery device. The self-controlled oil well casing gas recovery device comprises a combined type valve body and a self-pumping-and-draining air piston, wherein the combined type valve body comprises a left valve body and a right valve body, a double-valve-port pressure control regulating valve is arranged inside an inner cavity of the left valve body, a self-vibrating spring is arranged inside an inner cavity of the right valve body, a liquid inlet elbow is arrange at the bottom end of the left valve body, the liquid inlet elbow is connected with a crude oil outlet of an X-mas tree through pipes, a liquid outlet elbow is arranged at the bottom of the right valve body, the liquid outlet elbow is connected with an upstream port of an inlet pipeline through a check valve, the upper end of the left valve body and the upper end of the right valve body are communicated with each other through a cylindrical gap bridging passageway, a single-valve-port pressure control regulating valve is arranged in the gap bridging passageway, a gas-guide pipe is arranged on the lower portion of the right valve body, and the gas-guiding pipe is connected with a casing gas outlet of the X-mas tree through a valve. The self-pumping-and-draining air piston comprises a steel barrel, a steel barrel cap, a pressing plate, a rubber air bag, a booster spring and a rocker arm assembly. The self-controlled oil well casing gas recovery device is capable of conducting self-pump and self-drainage in a micro-low-pressure oil well and achieving a one-hundred-percent recovery of the oil well casing gas.
Description
Technical field
The utility model belongs to oil field well casing gas and reclaims the field, relates to the retracting device of low pressure, minute-pressure well casing gas, specifically a kind of " self-control type oil well casing ".
Background technology
In oilfield development process, the oil gas field oil-bearing structure that a lot of hyposmosis are arranged, production capacity is low, sleeve pipe tolerance is few, pressure is low, be difficult to recycle, in process of production, often use straight single current vent valve to solve casing gas and reclaim, this practice can cause casing gas (natural gas) to build the pressure for a long time, cause the producing fluid level of oil well to descend, directly affect oil well output.And can't reclaim and utilize for hypobaric casing gas, the mode of having to adopt emptying or igniting to burn is processed hypobaric casing gas, not only caused atmosphere pollution, the more important thing is has wasted non-renewable combustion gas resource, formed vicious circle, therefore be badly in need of that research and development are a kind of can to solve atmosphere pollution, can solve again the casing gas problem that builds the pressure for a long time, the device that again natural gas resource of preciousness is absolutely reclaimed simultaneously.
The utility model content
The purpose of this utility model is to provide a kind of self-control type oil well casing, can solve atmosphere pollution, can solve the problem that casing gas builds the pressure for a long time again, simultaneously again the hundred-percent recovery of the natural gas resource of preciousness, realize the oil and gas development purpose of safety, green, environmental protection.
For achieving the above object, the utility model is by the following technical solutions:
A kind of self-control type oil well casing, consist of by the combined type valve body with from the pump drainage air slide, it is characterized in that: described combined type valve body is comprised of left valve barrel and right valve barrel, be provided with the voltage-controlled control valve of bivalve mouth in the inner chamber of left valve barrel, be provided with in the right valve barrel inner chamber from shaking spring, the bottom of left valve barrel is equipped with the feed liquor elbow, the feed liquor elbow is connected with the crude exports of production tree by pipeline, the bottom of right valve barrel is equipped with the fluid elbow, the fluid elbow is connected by the upstream port of one way valve with the pipeline that enters the station, the upper end of left valve barrel and right valve barrel is by columnar gap bridge channel connection, the two ends of gap bridge passage are bolted with plug, the middle part of gap bridge passage is provided with the voltage-controlled control valve of single valve mouth, the left valve barrel upper end is provided with screen pack with gap bridge passage joining place, the bottom of right valve barrel is provided with wireway, wireway is connected with the casing gas outlet of production tree by a valve, from the pump drainage air slide by steel drum, the steel drum cap, pressing plate, rubber pneumatic bag, power assistant spring and rocker arm assembly consist of, rubber pneumatic bag is installed in the steel drum, rubber pneumatic bag is bellows form, power assistant spring is installed in the inside of rubber pneumatic bag, the steel drum cap is screwed onto the top of steel drum, pressing plate is arranged in the top of rubber pneumatic bag, the top of pressing plate is provided with montant, montant is stretched out by the centre bore of steel drum cap, the bottom of rubber pneumatic bag is provided with admission valve, outlet valve, admission valve, outlet valve is communicated with air inlet pipe and the stack of steel drum below respectively, air inlet pipe is connected with the casing gas outlet of production tree by No. two valves, stack is connected with the wireway of right valve barrel bottom; rocker arm assembly is by rocking arm; pull bar and push rod form; the montant at described pressing plate top is hinged by the rear portion of bearing pin and rocking arm; pull bar and push rod are separately positioned on afterbody and the middle part of rocking arm; the bottom of pull bar and push rod is set in respectively in the sleeve; the top of pull bar and push rod is overlapped respectively back-moving spring; the top of pull bar is hinged by the afterbody of bearing pin and rocking arm; the top of push rod is hinged by the middle part of bearing pin and rocking arm; the front end of rocking arm is equipped with a pressure block; pressure block is arranged on the displacement stroke of sucker rod; at sucker rod the locking clamp is housed, and the locking clamp is positioned at the top of pressure block.
The voltage-controlled control valve of described bivalve mouth has greatly, little two valve ports, on the large valve port big valve core is installed, on the little valve port small valve core is installed, big valve core, the small valve core structure is identical, each spool is by valve plug, valve rod, back-moving spring, anti-return nut consists of, valve plug is fixed in the head of valve rod, be provided with annular groove on the end face of valve plug, be provided with sealing ring in this annular groove, valve plug is resisted against on the valve port outer rim, and valve rod is stretched in the valve chamber by valve port, back-moving spring is sleeved on the valve rod, described anti-return nut is screwed onto the afterbody of valve rod, and an end of back-moving spring is resisted against on the valve port inner edge, and the other end of back-moving spring is resisted against on the anti-return nut.
The voltage-controlled control valve of described single valve mouth is by housing, valve plug, back-moving spring, the top nut, the tail nut forms, the rear portion of valve plug is provided with columnar spring base, one end of back-moving spring stretches in the spring base, be resisted against on the inner surface of spring base, the other end of back-moving spring is resisted against on the tail nut external surface, the top nut is screwed onto the top of housing, the tail nut is screwed onto the afterbody of housing, all be provided with pod apertures on spring base and the tail nut, be provided with valve port on the nut of top, the surface of valve plug is provided with annular groove, and sealing ring is housed in the annular groove, and the sealing circle is with sealing valve port.
The middle part of described left and right valve body is respectively arranged with bypass pipe, and pressure meter is housed on the bypass pipe.
The utility model has following positive beneficial effect:
This device adopts the combined type valve body, broken the nonadjustable technology drawback of traditional ball-and-seat pressure, in use can accomplish adjustable flexibly according to different oil well pressure operating modes, be provided with functional air slide from exhaust device, can in the low pressure well of small 0.001Mpa, accomplish to have guaranteed the recovery of low pressure well casing gas and little low pressure well casing gas from taking out from row.This device can be realized the hundred-percent recycling of all Oil/gas Well casing gas (natural gas).
Description of drawings
Fig. 1 is the structural representation of the utility model one embodiment.
Fig. 2 is the lateral view of Fig. 1.
Fig. 3 is the partial enlarged drawing of Fig. 1.
Fig. 4 is the partial enlarged drawing of Fig. 2.
Fig. 5 is the partial enlarged drawing of Fig. 3.
Fig. 6 is the partial enlarged drawing of Fig. 4.
Fig. 7 is from the rack-mount structural representation of pump drainage air slide.
Fig. 8 is the lateral view of Fig. 7.
Fig. 9 is the structural representation from the pump drainage air slide.
Figure 10 is the side-looking partial sectional view of Fig. 9.
Figure 11 is the structural representation of steel drum inside.
Figure 12 is the structural representation of removing power assistant spring among Figure 11.
Figure 13 is the structural representation of combined type valve body.
Figure 14 is the partial sectional view of Figure 13.
Figure 15 is the partial sectional view of Figure 14.
Figure 16 is the operating principle schematic diagram of combined type valve body, shows that large and small valve port all is in closed condition.
Figure 17 is the operating principle schematic diagram of combined type valve body, shows that large and small valve port all is in opening.
Figure 18 is the operating principle schematic diagram of combined type valve body, shows that large valve port is closed, little valve port opening.
Figure 19 is the structural representation of spool.
Figure 20 is the upward view of Figure 19.
Figure 21 is the structural representation of the voltage-controlled control valve of single valve mouth.
The specific embodiment
Number in the figure:
Voltage-controlled control valve 4 spools of 1 left valve barrel, 2 right valve barrels, 3 bivalve mouths
5 spools 6 are from shaking spring 7 feed liquor elbows 8 fluid elbows
12 No. two valves of No. 11 valves of 9 one way valves, 10 valve bodies
13 No. three valve 14 gap bridge passages 15 plugs 16 plugs
Voltage-controlled control valve 18 screen packs of 17 single valve mouths 19 wireways
20 from the pump drainage air slide
21 steel drums, 22 steel drum caps, 23 pressing plates, 24 rubber pneumatic bags
25 power assistant spring, 26 top pressure closures, 27 sealing bottoms, 28 montants
The outlet of 29 centre bores, 30 production trees, 31 crude exports, 32 casing gas
33 pipelines, 34 admission valves, 35 outlet valves, 36 air inlet pipe
37 stacks, 38 flange, 39 flange, 40 supports
41 Rocker arm 4s, 2 pull bars, 43 push rods, 44 sleeves
45 sleeves, 46 back-moving springs, 47 back-moving springs, 48 pressure blocks
49 clamps, 50 sucker rods, 51 bearing pins, 52 bearing pins
53 bearing pins, 54 bypass pipes, 55 valves, 56 pressure meters
57 bypass pipes, 58 valves, 59 pressure meters
60 oil pumpers, 61 valve plugs, 62 valve rods, 63 back-moving springs
64 anti-return nuts, 65 housings, 66 valve plugs, 67 back-moving springs
68 top nuts, 69 tail nuts, 70 sealing rings
73 threeways of 71 pipelines, 72 pipelines
74 large valve port 75 little valve port 76 spring bases
77 pod apertures, 78 valve ports, 79 pod apertures
80 annular grooves, 81 upstream ports, 82 negative pressure hollow area
83 pipelines, 84 pipelines, 85 pipelines, 86 suspension rods
Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13, the utility model is a kind of self-control type oil well casing, consist of by combined type valve body 10 with from pump drainage air slide 20, combined type valve body 10 is comprised of left valve barrel 1 and right valve barrel 2, please refer to Figure 14, Figure 15, Figure 16, Figure 17, Figure 18, be provided with the voltage-controlled control valve 3 of bivalve mouth in the inner chamber of left valve barrel 1, the voltage-controlled control valve 3 of bivalve mouth has greatly, little two valve ports, on the large valve port 74 big valve core 4 is installed, on the little valve port 75 small valve core 5 is installed, big valve core 4 is different with the pressure that small valve core 5 is opened valve port, the top of right valve barrel 2 is provided with suspension rod 86, be equipped with on the suspension rod 86 from shaking spring 6, please refer to Fig. 5, Fig. 6, the bottom of left valve barrel 1 is equipped with feed liquor elbow 7, feed liquor elbow 7 is connected with the crude exports 31 of production tree 30 by pipeline 33, the bottom of right valve barrel 2 is equipped with fluid elbow 8, fluid elbow 8 is by No. four pipelines 84, one way valve 9 is connected with the upstream port 81 of the pipeline that enters the station, please refer to Figure 14, Figure 15, Figure 16, Figure 17, Figure 18, the upper end of left valve barrel 1 and right valve barrel 2 is communicated with by columnar gap bridge passage 14, the left side of gap bridge passage 14, right two ends are bolted with respectively plug 15,16, the middle part of gap bridge passage 14 is provided with the voltage-controlled control valve 17 of single valve mouth, left valve barrel 1 upper end and gap bridge passage joining place are provided with screen pack 18, the bottom of right valve barrel 2 is provided with wireway 19, wireway 19 is connected as shown in Figure 6 with a valve 11 by threeway 13, No. one valve 11 is connected with threeway 73 by a pipeline 71, and threeway 73 is connected with the casing gas outlet 32 of production tree 30 by No. five pipelines 85.
Please refer to Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, from pump drainage air slide 20 by steel drum 21, steel drum cap 22, pressing plate 23, rubber pneumatic bag 24, power assistant spring 25 and rocker arm assembly consist of, steel drum 21 is installed on the support 40, rubber pneumatic bag 24 is installed in the steel drum 21, rubber pneumatic bag 24 is bellows form, top and bottom are separately installed with top pressure closure 26 and sealing bottom 27, power assistant spring 25 is installed in the inside of rubber pneumatic bag 24, steel drum cap 22 is screwed onto the top of steel drum 21, pressing plate 23 is arranged in the top of rubber pneumatic bag 24, the top of pressing plate 23 is provided with montant 28, montant 28 is stretched out by the centre bore 29 of steel drum cap, the bottom of rubber pneumatic bag 24 is provided with admission valve 34, outlet valve 35, admission valve 34, outlet valve 35 is communicated with air inlet pipe 36 and the stack 37 of steel drum below respectively.Air inlet pipe 36 is connected with No. two pipelines 72 by No. two valves 12, and No. two pipeline 72 is connected with the casing gas outlet 32 of production tree 30 by threeway 73, No. five pipelines 85.Stack 37 is connected with the flange 39 of No. three pipeline 83 lower ends by flange 38, and the upper end of No. three pipelines 83 is communicated with wireway 19 by threeway 13.
please refer to Fig. 9, Figure 10, rocker arm assembly is by Rocker arm 41, pull bar 42 and push rod 43 form, the montant 28 at pressing plate top is hinged with the rear portion of Rocker arm 41 by bearing pin 51, pull bar 42 and push rod 43 are separately positioned on afterbody and the middle part of Rocker arm 41, the bottom of pull bar 42 and push rod 43 is set in respectively sleeve 44, in 45, thereby can more than, lower flexible, the top of pull bar 42 and push rod 43 is overlapped respectively back-moving spring 46, 47, back-moving spring 46 consists of extension spring, its elastic force trend is to produce downward pulling force, back-moving spring 47 consists of the top spring, its elastic force trend is to produce thrust upwards, the top of pull bar 42 is hinged with the afterbody of Rocker arm 41 by bearing pin 52, the top of push rod 43 is hinged with the middle part of Rocker arm 41 by bearing pin 53, the front end of Rocker arm 41 is equipped with a pressure block 48, pressure block 48 is arranged on the displacement stroke of sucker rod 50, locking clamp 49 is housed on sucker rod 50, locking clamp 49 is positioned at top such as Fig. 3 of pressure block 48, shown in Figure 4, when oil pumper 60 moves to down stroke, locking clamp 49 drops on pressure block 48 with sucker rod 50 is descending, Rocker arm 41 is to lower swing, montant 28 moves down, 23 pairs of rubber pneumatic bags 24 of pressing plate are exerted pressure, rubber pneumatic bag 24 is compressed, intake valve 34 cuts out, air bleeding valve 35 is opened, casing gas in rubber pneumatic bag 24 is through No. three pipelines 83, threeway 13 enters in wireway 19, through wireway 19, enter in the negative pressure hollow area 82 of right valve barrel 2 inside.Admission valve 34, outlet valve 35 all are made of one way valve, but the installation direction of its spool is opposite, thereby realize air inlet and exhaust, and admission valve 34, outlet valve 35 adopt prior art.
When oil pumper 60 moves to upstroke, sucker rod 50 rises, locking clamp 49 is up with sucker rod 50, leave pressure block 48, under the effect of pull bar 42 and push rod 43, Rocker arm 41 upwards swings, and moves on the pressing plate 23, no longer rubber pneumatic bag 24 is exerted pressure, under the elastic force effect of power assistant spring 25, compressed rubber pneumatic bag 24 trails again, rubber pneumatic bag 24 volume expansions, produce the vacuum suction effect, admission valve 34 is opened, and outlet valve 35 is closed, and casing gas is through No. five pipelines 85, threeway 73, No. two pipelines 72, No. two valves 12, air inlet pipe 36, enter in the rubber pneumatic bag 24, when oil pumper 60 moves to down stroke again, realize the minute-pressure exhaust.When 20 work of pump drainage air slide, No. one valve 11 is in closed condition, and No. two valve 12 is in opening.
Please refer to Figure 13, Figure 14, Figure 15, Figure 16, Figure 17, Figure 18, the middle part of left valve barrel 1 is provided with bypass pipe 54, and valve 55 and pressure meter 56 are housed on the bypass pipe 54.The middle part of right valve barrel 2 is provided with bypass pipe 57, and valve 58 and pressure meter 59 are housed on the bypass pipe 57.
Big valve core 4, small valve core 5 structures are identical, its structure now is described as an example of small valve core 5 example, please refer to Figure 19, Figure 20, small valve core 5 is by valve plug 61, valve rod 62, back-moving spring 63, anti-return nut 64 consists of, valve plug 61 is fixed in the head of valve rod 62, be provided with annular groove on the end face of valve plug 61, be provided with sealing ring 70 in this annular groove, valve plug 61 is resisted against on the valve port outer rim, valve rod 62 is stretched in the valve pocket by valve port, and back-moving spring 63 is sleeved on the valve rod 62, and anti-return nut 64 is screwed onto the afterbody of valve rod 62, one end of back-moving spring 63 is resisted against on the valve port inner edge, and back-moving spring 63 other ends are resisted against on the anti-return nut 64.Valve rod 62 and anti-return nut 64 all are the gaily decorated basket shapes of hollow out, the advantage of this structure is lightweight, flow resistance to crude oil is low, pressure sensitive to crude oil, pressure automatic control by crude oil is opened valve port, open the pressure of valve port by the elastic force decision of back-moving spring 63, the elastic force of back-moving spring 63 is determined that by its compression degree the compression degree of back-moving spring 63 can be regulated by rotation anti-return nut 64.
Please refer to Figure 21, the voltage-controlled control valve 17 of single valve mouth is by housing 65, valve plug 66, back-moving spring 67, top nut 68, tail nut 69 forms, the rear portion of valve plug 66 is provided with columnar spring base 76, the top of spring base 76 is provided with pod apertures 77, one end of back-moving spring 67 stretches in the spring base 76, be resisted against on the inner surface of spring base 76, the other end of back-moving spring 67 is resisted against on tail nut 69 external surfaces, top nut 68 is screwed onto the top of housing 65, tail nut 69 is screwed onto the afterbody of housing 65, the benefit of this structure is simple in structure, is convenient to adjust the compression degree of back-moving spring 67.By rotation top nut 68, tail nut 69 can change the compression degree of back-moving spring 67, be provided with pod apertures 79 on the tail nut 69, be provided with valve port 78 on the top nut 68, the surface of valve plug 66 is provided with annular groove 80, in the annular groove 80 sealing ring is housed, by sealing ring valve port 78 is sealed, the pressure that valve port 78 is opened is determined by the compression degree of back-moving spring 67, in the present embodiment, the pressure that valve port 78 is opened is 0.4Mpa, and the fluid pressure of crude oil is applied on the valve plug 66, when pressure during greater than 0.4Mpa, just can overcome the elastic force of back-moving spring 67, valve port 78 is opened.
This device can be accomplished the hundred-percent recovering effect of all Oil/gas Well casing gas (natural gas), the operating principle of oil pumper 60 is to pump, upstroke discharge opeing, well head pressure height, down stroke feed liquor, well head pressure are low, but the well head band hydraulic coupling of having a surplus when down stroke, this device has utilized the pressure of up-down stroke to change dexterously, the orderly unlatching of voltage-controlled control valve with combination produces a well head pipeline negative pressuren zone, makes casing gas reach the effect of without hindrance recovery.The voltage-controlled control valve 3 of bivalve mouth is housed in the left valve barrel 1 of this device, the voltage-controlled control valve 3 of bivalve mouth has large and small two valve ports, on the large valve port 74 big valve core 4 is installed, on the little valve port 75 small valve core 5 is installed, the pressure that big valve core 4 is opened large valve port 74 is 0.5Mpa, the pressure that small valve core 5 is opened little valve port 75 is 0.3Mpa, is provided with the voltage-controlled control valve 17 of single valve mouth in the gap bridge passage, and the work opening pressure of the voltage-controlled control valve 17 of single valve mouth is 0.4Mpa.
When the casing gas tolerance of oil well does not drop to little low pressure, when casing gas can be arranged certainly, open valve 11, valve-off 12, when oil pumper 60 moves to the upstroke discharge opeing, left valve barrel 1 interior big valve core 4, small valve core 5 is opened respectively valve port 74,75 as shown in figure 17, simultaneously discharge opeing, when the upstroke end of run, go to well mouth of oil well pressure drop in the process of down stroke, big valve core 4 is closed large valve port 74, small valve core 5 continues to open little valve port 75 as shown in figure 18, liquid enters the top of left valve barrel 1 more than the space that sucker rod 50 bodies occupy when down stroke by small valve core 5, because of voltage-controlled control valve 17 opening pressures of single valve mouth in the gap bridge passage 14 higher than small valve core 5 pressure in the left valve barrel, the voltage-controlled control valve 17 of single valve mouth can't be opened, so liquid more than the fraction is stayed in the top of left valve barrel, the downstream liquid outlet pressure that makes right valve barrel 2 is zero, at fluid elbow 8 and enter the station an one way valve 9 is installed between the pipeline upstream port 81, so formed a negative pressure hollow area 82 in the inside of right valve barrel 2, this negative pressure hollow area also comprises fluid elbow 8, the inside of No. four pipelines 84, casing gas is without hindrance to be discharged in the negative pressure hollow area, having realized that wellhead sleeve gas is without hindrance enters in the wellhead manifold, when oil pumper 60 moves to next upstroke, casing gas in the wellhead manifold is discharged in the production trunk line with oil mixing with water, enter multi-purpose station and concentrate use, for guaranteeing that the voltage-controlled control valve 17 of single valve mouth in the combined type valve body is not stopped up by the impurity in the oil well, in left valve barrel 1 upper end and gap bridge passage 14 entrance joining places a screen pack 18 is housed, guaranteed that the impurity in the middle of the crude oil can not result in blockage to the voltage-controlled control valve 17 of single valve mouth, at two ends, gap bridge passage 14 left and right sides plug 15 is housed respectively, 16, plug 15 is set, 16 purpose is to be convenient to keep in repair aborning and the voltage-controlled control valve 17 of single valve mouth in the gap bridge passage 14 is done the pressure adjustment, on a left side, right valve barrel 1, on 2 the bypass pipe pressure meter is housed, so that according to a left side, the pressure condition of right valve barrel is adjusted the pressure size of the voltage-controlled control valve 17 of single valve mouth, has realized the purpose that low pressure oil gas well casing gas reclaims.
When the casing gas tolerance of oil well drops to little low pressure, when casing gas can not be arranged certainly, install pressure block 48 at the front end of Rocker arm 41, install locking clamp 49 at sucker rod 50, when oil pumper 60 moves to down stroke, locking clamp 49 is with sucker rod 50 descending dropping on the pressure block 48; Rocker arm 41 is to lower swing; make the pressing plate 23 on air slide top descending; compressing rubber air bag 24, admission valve 34 cuts out, outlet valve 35 is opened; the casing gas in the rubber pneumatic bag 24 is through No. three pipelines 83; threeway 13 enters in the wireway 19, enters in the negative pressure hollow area 82 of right valve barrel 2 inside through wireway 19.Admission valve 34, outlet valve 35 all are made of one way valve, but the installation direction of its spool is opposite, thereby realize air inlet and exhaust, and admission valve 34, outlet valve 35 adopt prior art.
When oil pumper 60 moves to upstroke, sucker rod 50 rises, locking clamp 49 is up with sucker rod 50, leave pressure block 48, under the effect of pull bar 42 and push rod 43; Rocker arm 41 upwards swings; move on the pressing plate 23; no longer rubber pneumatic bag 24 is exerted pressure, under the elastic force effect of power assistant spring 25, compressed rubber pneumatic bag 24 trails again; rubber pneumatic bag 24 volume expansions; produce the vacuum suction effect, admission valve 34 is opened, outlet valve 35 is closed; casing gas is through No. five pipelines 85; threeway 73; No. two pipelines 72; No. two valves 12; air inlet pipe 36; enter in the rubber pneumatic bag 24; the realization minute-pressure is bled, when oil pumper 60 moves to down stroke again, realize the minute-pressure exhaust.The operating principle of air slide is compression exhaust, it is air-breathing to reset, and for guaranteeing resetting of rubber pneumatic bag 24, power assistant spring 25 arranged in that rubber pneumatic bag 24 is in-built, guaranteed that air slide has enough energy and air-breathing energy and can in time reset of resetting.The casing gas that is advanced in the air slide inner chamber by rubber pneumatic bag 24 suctions is forced to enter in the negative pressure hollow area of well mouth of oil well manifold, when oil pumper runs to next stroke, air-fuel mixture is discharged in the defeated main line of collection together, has realized that the casing gas of little low pressure oil gas well reclaims.This device can be realized minute-pressure and the hundred-percent recycling of low pressure oil gas well natural gas, has reached the result of use of low-cost high production, has widely actual application prospect.
Claims (4)
1. self-control type oil well casing, consist of by the combined type valve body with from the pump drainage air slide, it is characterized in that: described combined type valve body is comprised of left valve barrel and right valve barrel, be provided with the voltage-controlled control valve of bivalve mouth in the inner chamber of left valve barrel, be provided with in the right valve barrel inner chamber from shaking spring, the bottom of left valve barrel is equipped with the feed liquor elbow, the feed liquor elbow is connected with the crude exports of production tree by pipeline, the bottom of right valve barrel is equipped with the fluid elbow, the fluid elbow is connected by the upstream port of one way valve with the pipeline that enters the station, the upper end of left valve barrel and right valve barrel is by columnar gap bridge channel connection, the two ends of gap bridge passage are bolted with plug, the middle part of gap bridge passage is provided with the voltage-controlled control valve of single valve mouth, the left valve barrel upper end is provided with screen pack with gap bridge passage joining place, the bottom of right valve barrel is provided with wireway, wireway is connected with the casing gas outlet of production tree by a valve, from the pump drainage air slide by steel drum, the steel drum cap, pressing plate, rubber pneumatic bag, power assistant spring and rocker arm assembly consist of, rubber pneumatic bag is installed in the steel drum, rubber pneumatic bag is bellows form, power assistant spring is installed in the inside of rubber pneumatic bag, the steel drum cap is screwed onto the top of steel drum, pressing plate is arranged in the top of rubber pneumatic bag, the top of pressing plate is provided with montant, montant is stretched out by the centre bore of steel drum cap, the bottom of rubber pneumatic bag is provided with admission valve, outlet valve, admission valve, outlet valve is communicated with air inlet pipe and the stack of steel drum below respectively, air inlet pipe is connected with the casing gas outlet of production tree by No. two valves, stack is connected with the wireway of right valve barrel bottom; rocker arm assembly is by rocking arm; pull bar and push rod form; the montant at described pressing plate top is hinged by the rear portion of bearing pin and rocking arm; pull bar and push rod are separately positioned on afterbody and the middle part of rocking arm; the bottom of pull bar and push rod is set in respectively in the sleeve; the top of pull bar and push rod is overlapped respectively back-moving spring; the top of pull bar is hinged by the afterbody of bearing pin and rocking arm; the top of push rod is hinged by the middle part of bearing pin and rocking arm; the front end of rocking arm is equipped with a pressure block; pressure block is arranged on the displacement stroke of sucker rod; at sucker rod the locking clamp is housed, and the locking clamp is positioned at the top of pressure block.
2. a kind of self-control type oil well casing as claimed in claim 1, it is characterized in that: the voltage-controlled control valve of described bivalve mouth has greatly, little two valve ports, on the large valve port big valve core is installed, on the little valve port small valve core is installed, big valve core, the small valve core structure is identical, each spool is by valve plug, valve rod, back-moving spring, anti-return nut consists of, valve plug is fixed in the head of valve rod, be provided with annular groove on the end face of valve plug, be provided with sealing ring in this annular groove, valve plug is resisted against on the valve port outer rim, valve rod is stretched in the valve chamber by valve port, and back-moving spring is sleeved on the valve rod, and described anti-return nut is screwed onto the afterbody of valve rod, one end of back-moving spring is resisted against on the valve port inner edge, and the other end of back-moving spring is resisted against on the anti-return nut.
3. a kind of self-control type oil well casing as claimed in claim 1, it is characterized in that: the voltage-controlled control valve of described single valve mouth is by housing, valve plug, back-moving spring, the top nut, the tail nut forms, the rear portion of valve plug is provided with columnar spring base, one end of back-moving spring stretches in the spring base, be resisted against on the inner surface of spring base, the other end of back-moving spring is resisted against on the tail nut external surface, the top nut is screwed onto the top of housing, the tail nut is screwed onto the afterbody of housing, all be provided with pod apertures on spring base and the tail nut, be provided with valve port on the nut of top, the surface of valve plug is provided with annular groove, sealing ring is housed in the annular groove, and the sealing circle is with sealing valve port.
4. a kind of self-control type oil well casing as claimed in claim 1, it is characterized in that: the middle part of described left and right valve body is respectively arranged with bypass pipe, and pressure meter is housed on the bypass pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220509199 CN202882857U (en) | 2012-09-29 | 2012-09-29 | Self-controlled oil well casing gas recovery device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220509199 CN202882857U (en) | 2012-09-29 | 2012-09-29 | Self-controlled oil well casing gas recovery device |
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| CN202882857U true CN202882857U (en) | 2013-04-17 |
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| CN 201220509199 Expired - Fee Related CN202882857U (en) | 2012-09-29 | 2012-09-29 | Self-controlled oil well casing gas recovery device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074494A (en) * | 2014-07-16 | 2014-10-01 | 檀长江 | Combined-type oil well casing gas recovery device |
| CN107605437A (en) * | 2017-09-30 | 2018-01-19 | 周美凤 | A kind of intelligent oil production pump |
| CN109538169A (en) * | 2018-12-10 | 2019-03-29 | 胜利油田森诺胜利工程有限公司 | A kind of simple oil field shaft mouth associated gas collection device and method |
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2012
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104074494A (en) * | 2014-07-16 | 2014-10-01 | 檀长江 | Combined-type oil well casing gas recovery device |
| CN104074494B (en) * | 2014-07-16 | 2016-06-22 | 檀长江 | Combination type well casing gas recovery device |
| CN107605437A (en) * | 2017-09-30 | 2018-01-19 | 周美凤 | A kind of intelligent oil production pump |
| CN107605437B (en) * | 2017-09-30 | 2019-06-25 | 山东华冠能源技术有限公司 | A kind of intelligent oil production pump |
| CN109538169A (en) * | 2018-12-10 | 2019-03-29 | 胜利油田森诺胜利工程有限公司 | A kind of simple oil field shaft mouth associated gas collection device and method |
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