CN204572406U - A kind of rod pump equipment for coal-bed gas exploitation - Google Patents
A kind of rod pump equipment for coal-bed gas exploitation Download PDFInfo
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- CN204572406U CN204572406U CN201520182717.2U CN201520182717U CN204572406U CN 204572406 U CN204572406 U CN 204572406U CN 201520182717 U CN201520182717 U CN 201520182717U CN 204572406 U CN204572406 U CN 204572406U
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- sucker rod
- coal
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- bed gas
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Abstract
The utility model discloses a kind of rod pump equipment for coal-bed gas exploitation, comprise pumping unit, oil pipe, sucker rod and rod pump; Oil pipe is arranged in underground bushing, and rod pump comprises the pump barrel and plunger that match, and pump barrel is positioned at the lower end of oil pipe and is communicated with oil pipe, and the bottom of pump barrel and the bottom of plunger are equipped with traveling valve, and the upper shell of plunger has intercommunicating pore; Pumping unit rest on the ground, and plunger can be driven to move reciprocatingly by sucker rod; Sucker rod is hollow structure, and the joint of sucker rod and plunger is provided with openable plugging structure, so that blanked-off pipe cover annular space and rod tube annular space, when opening plugging structure, by the inner mining of sucker rod.This rod pump equipment can adopt two kinds of production schemes, select suitable production scheme according to the change of water yield, two kinds of production schemes can realize continuous conversion, carry out continuous, stable step-down draining to pit shaft, do not need workover eration, thus the continuous and stable production of coal bed gas well can be ensured.
Description
Technical field
The utility model relates to Coal-seam Gas Recovery Technologies field, particularly relates to a kind of rod pump equipment for coal-bed gas exploitation.
Background technique
Coal-seam gas refers to that being stored in coal seam take methane as main component, to be adsorbed on matrix of coal particle surface, part is free in coal hole or the hydrocarbon gas be dissolved in coal seam water, is the associated minerals resource of coal, belongs to Unconventional forage.
Coal-seam gas is formed in coalification course and composes a kind of Unconventional forage be stored in coal seam.Coal-seam gas first will discharge water a large amount of in coal seam before beginning aerogenesis, and in coal seam, natural fissure or hugger are usually by water saturation, and coal-seam gas is adsorbed on coal, extraction coal-seam gas, and it first will be allowed to desorb from coal.Only have and extract enough water out, after coal seam Pressure Drop to the desorption pressures of coal, the desorb of coal-seam gas just starts.When coal seam pressure is less than or equal to desorption pressures, gas is desorb from coal, flow to fracturing fracture, then flow in pit shaft, then exploit out by coal-seam gas from pit shaft along hugger.
At the initial stage of coal-seam gas ground drilling mining, water yield is comparatively large, substantially not aerogenesis, usually uses artificial lifting equipment to take shaft bottom liquid to ground, realizes drainage and step-down.Along with the discharge of mine water, near wellbore pressure drop, has gas desorption output gradually.Enter after date in mining, near wellbore pressure drop to a certain extent after, gas production raises gradually and keeps stable, and water yield is very low or do not produce water.
At present, conventional artificial lift equipment is rod pump equipment, is driven the oil well pump work of down-hole, the water in pit shaft is expelled to ground by ground pumping unit by sucker rod.Along with the reduction of water yield, there is the situations such as rod and tube partial-wear, power consumption be large in the rising of gas production.
In addition, because water yield is change, the water displacement excursion of rod pump equipment is little, be not suitable with the change of coal bed gas well formation water production in process of production, need frequent its running parameter of adjustment, and frequent well workover, not only Economy is bad, and be difficult to meet continuously, stablize the requirement of step-down draining, have impact on the production efficiency of coal-seam gas.
Therefore, when how to design the change of a kind of water yield, can continuously, stablize the rod pump equipment of step-down draining, be the technical problem that those skilled in the art are badly in need of solution at present.
Model utility content
The purpose of this utility model is to provide a kind of rod pump equipment for coal-bed gas exploitation, and the production efficiency of this rod pump equipment is higher, can adapt to water yield change, to pit shaft continuously, stablize step-down draining.
In order to realize above-mentioned technical purpose, the utility model provides a kind of rod pump equipment for coal-bed gas exploitation, comprises pumping unit, oil pipe, sucker rod and rod pump; The bottom of described oil pipe is positioned at underground bushing, forms pipe box annular space; The bottom of described sucker rod is positioned at described oil pipe, forms rod tube annular space; Described rod pump comprises the pump barrel and plunger that match, and described pump barrel is positioned at the lower end of described oil pipe and is communicated with described oil pipe, and the bottom of described pump barrel and the bottom of described plunger are equipped with traveling valve, and the upper shell of described plunger has intercommunicating pore; Described pumping unit rest on the ground, and described plunger can be driven to move reciprocatingly by described sucker rod; Described sucker rod is hollow structure, and the joint of described sucker rod and described plunger is provided with openable plugging structure, so that after closing described pipe box annular space and described rod tube annular space successively, when opening described plugging structure, by the inside mining of described sucker rod.
Preferably, the described intercommunicating pore of the upper shell of described plunger is provided with one-way valve, and described one-way valve is to unilaterally connected outside described plunger.
Preferably, described plugging structure comprises plugging plate and backplate, and described plugging plate and described backplate are fixedly arranged on the inwall at described sucker rod; Described plugging plate is provided with impact fracture portion, so that when dropping into weight to described sucker rod inside, described plugging plate can rupture along described impact fracture portion and come off; Described backplate is positioned at the downside of described plugging plate, and object can be avoided to fall into down-hole.
Preferably, described impact fracture portion is the fracture groove of the annular of described plugging plate perimembranous.
Preferably, the corresponding position of the upper and lower both sides of described plugging plate is equipped with described fracture groove.
Preferably, the interior welds of described plugging plate and/or described backplate and described sucker rod.
Preferably, described plugging structure is be arranged on the down-hole switch in described sucker rod, sucker rod described in shutoff when described down-hole switch is closed, and described down-hole switch can be triggered by weight and open or close.
Preferably, described down-hole switch comprises cock and cooperating structure thereof, and described cooperating structure is located at the inwall of described sucker rod, has the center hole coordinated with described cock; When described weight triggers described cock, described cock can turn an angle, to open or to close described down-hole switch.
Preferably, the downside of described cooperating structure has chisel teeth, and the downside of described cock has the projection coordinated with described chisel teeth, and when described weight triggers described cock, described projection can move along the inclined-plane of described chisel teeth, to make described cock rotate.
The rod pump equipment for coal-bed gas exploitation that the utility model provides, comprises pumping unit, oil pipe, sucker rod and rod pump; Oil pipe is arranged in underground bushing, and rod pump comprises the pump barrel and plunger that match, and pump barrel is positioned at the lower end of oil pipe and is communicated with oil pipe, and the bottom of pump barrel and the bottom of plunger are equipped with traveling valve, and the upper shell of plunger has intercommunicating pore; Pumping unit rest on the ground, and plunger can be driven to move reciprocatingly by sucker rod; Sucker rod is hollow structure, and the joint of sucker rod and plunger is provided with openable plugging structure, so that after blanked-off pipe overlaps annular space and rod tube annular space successively, when opening plugging structure, by the inside mining of sucker rod.
In this rod pump equipment, between underground bushing and oil pipe, form pipe box annular space, between oil pipe and sucker rod, form rod tube annular space.At this equipment work initial stage, the space of sucker rod inside is closed by plugging structure, and pumping unit drives plunger reciprocates by sucker rod.When plunger is up, the traveling valve of plunger base is in closed condition by head of liquid above plunger, and the liquid above oil pipe is discharged, and the pressure of plunger lower space reduces, and the traveling valve bottom pump barrel is opened by the effect of pit shaft ambient pressure, and pump barrel inside enters liquid; When plunger is descending, liquid pressurized in pump barrel, the traveling valve of plunger base is opened, and the traveling valve bottom pump barrel cuts out, and the liquid of plunger bottom enters plunger upper part space.During rod pump work, produce water by rod tube annular space, discharged by mine water, the water yield of this working stage is larger.Along with the discharge of mine water, the pressure in coal seam reduces gradually, coal seam Pressure Drop be low to moderate resolve pressure time, coal-seam gas start resolve, the gas flow parsed in underground bushing, by pipe box annular space aerogenesis.Enter after date in mining, to a certain extent, gas production raises and keeps stable the pressure drop in coal seam gradually, and water yield is very low or do not produce water, and water yield is unstable, there will be the phenomenon of rod and tube partial-wear, simultaneously larger to the power consumption of power equipment.Now, blanked-off pipe cover annular space and rod tube annular space successively, open plugging structure, change production scheme, then the water of down-hole and gas are by the space output all by sucker rod inside, and compare with rod tube annular space with pipe box annular space, the cross-section area in the space of sucker rod inside is less, do not need power, the pressure in coal seam can make the draining of sucker rod aerogenesis.
This rod pump equipment can adopt two kinds of production schemes, select suitable production scheme according to the change of water yield, two kinds of production schemes can realize continuous conversion, carry out continuous, stable step-down draining to pit shaft, do not need workover eration, thus the continuous and stable production of coal bed gas well can be ensured.
This equipment by the space mining of sucker rod inside, does not need power, the energy of coal-seam gas can be utilized to carry out draining after changing production scheme, without the need to increasing operating cost, and obvious energy conservation.During by sucker rod mining, do not need sucker rod to move, thus the phenomenon of rod and tube partial-wear can be avoided.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of rod pump equipment for coal-bed gas exploitation provided by the utility model;
Fig. 2 is the close-up schematic view of the underground bushing of the rod pump equipment shown in Fig. 1;
Fig. 3 is the working procedure schematic diagram of a kind of embodiment of rod pump equipment shown in Fig. 2;
Fig. 4 is the working procedure schematic diagram of the another kind of embodiment of the rod pump equipment shown in Fig. 2;
Fig. 5 is the structural representation of a kind of embodiment of plugging structure of sucker rod lower end in the rod pump equipment shown in Fig. 2;
The structural representation of the another kind of embodiment of the plugging structure that Fig. 6 is sucker rod lower end in the rod pump equipment shown in Fig. 2.
Wherein, the reference character in Fig. 1 to Fig. 6 and the corresponding relation between component names as follows:
Pumping unit 1; Oil pipe 2; Rod tube annular space 23; Pipe box annular space 25;
Sucker rod 3; Plugging structure 31; Plugging plate 32; Backplate 33; Fracture groove 34; Cock 35; Cooperating structure 36
Rod pump 4; Pump barrel 41; Plunger 42; One-way valve 43; Underground bushing 5.
Embodiment
Core of the present utility model is to provide a kind of rod pump equipment for coal-bed gas exploitation, and the production efficiency of this rod pump equipment is higher, can adapt to water yield change, to pit shaft continuously, stablize step-down draining.
In order to make those skilled in the art person understand the utility model scheme better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 1 to Fig. 6, Fig. 1 is the structural representation of a kind of embodiment of rod pump equipment for coal-bed gas exploitation provided by the utility model, Fig. 2 is the close-up schematic view of the underground bushing of the rod pump equipment shown in Fig. 1, Fig. 3 is the working procedure schematic diagram of a kind of embodiment of rod pump equipment shown in Fig. 2, Fig. 4 is the working procedure schematic diagram of the another kind of embodiment of the rod pump equipment shown in Fig. 2, Fig. 5 is the structural representation of a kind of embodiment of plugging structure of sucker rod lower end in the rod pump equipment shown in Fig. 2, the structural representation of the another kind of embodiment of the plugging structure that Fig. 6 is sucker rod lower end in the rod pump equipment shown in Fig. 2.
In a kind of concrete mode of execution, the utility model provides a kind of rod pump equipment for coal-bed gas exploitation, comprises pumping unit 1, oil pipe 2, sucker rod 3 and rod pump 4; The bottom of oil pipe 2 is positioned at underground bushing 5, forms pipe box annular space 25; The bottom of sucker rod 3 is positioned at oil pipe 2, forms rod tube annular space 23; Rod pump 4 comprises the pump barrel 41 and plunger 42 that match, and pump barrel 41 is positioned at the lower end of oil pipe 2 and is communicated with oil pipe 2, and the bottom of pump barrel 41 and the bottom of plunger 42 are equipped with traveling valve, and the upper shell of plunger 42 has intercommunicating pore; Pumping unit 1 rest on the ground, and plunger 42 can be driven to move reciprocatingly by sucker rod 3; Sucker rod 3 is hollow structure, and sucker rod 3 is provided with openable plugging structure 31 with the joint of plunger 42, so that after blanked-off pipe overlaps annular space 25 and rod tube annular space 23 successively, when opening plugging structure 31, by the inside mining of sucker rod 3.
Coal-seam gas first will discharge water a large amount of in coal seam before beginning aerogenesis.In coal seam, natural fissure or hugger are usually by water saturation, and coal-seam gas is adsorbed on coal, extraction coal-seam gas, and coal-seam gas first will be allowed to desorb from coal, and only have and extract enough water out, after coal seam Pressure Drop to the desorption pressures of coal, coal-seam gas just starts desorb.
As depicted in figs. 1 and 2, in this rod pump equipment, form pipe box annular space 25 between underground bushing 5 and oil pipe 2, form rod tube annular space 23 between oil pipe 2 and sucker rod 3, sucker rod 3 inside is hollow structure, has three passages in down-hole sleeve 5.
At this equipment work initial stage, this rod pump equipment adopts the first production scheme work, and the lower end of sucker rod 3 is closed by plugging structure 31, and pumping unit 1 drives plunger 42 to-and-fro motion by sucker rod 3.
Upstroke: plunger 42 is up, traveling valve bottom plunger 42 is in closed condition by head of liquid above plunger 42, and the liquid above oil pipe 2 is discharged, and the pressure of plunger 42 lower space reduces, traveling valve bottom pump barrel 41 is opened by the effect of pit shaft ambient pressure, and pump barrel 41 inside enters liquid;
Down stroke: plunger 42 is descending, liquid pressurized in pump barrel 41, the traveling valve bottom plunger 42 is opened, and traveling valve bottom pump barrel 41 cuts out, and the intercommunicating pore of traveling valve bottom plunger 42 of the liquid of plunger 42 bottom and upper shell enters plunger 42 upper space.
Along with the action of pumping unit 1, drive plunger 42 to repeat above-mentioned action, produce water by rod tube annular space 23 by sucker rod 3, discharged by mine water, the water yield of this working stage is larger.Along with the discharge of mine water, the pressure in coal seam reduces gradually, coal seam Pressure Drop be low to moderate resolve pressure time, coal-seam gas start resolve, the gas flow parsed in underground bushing 5, by pipe box annular space 25 aerogenesis.
Enter after date in mining, to a certain extent, gas production raises and keeps stable the pressure drop in coal seam gradually, and water yield is very low or do not produce water, and water yield is unstable, there will be the phenomenon of rod and tube partial-wear, simultaneously larger to the power consumption of power equipment.
Now, blanked-off pipe cover annular space 25 and rod tube annular space 23 successively, open plugging structure 31, change production scheme, then the water of down-hole and gas are by all by the space output of sucker rod 3 inside, and compare with rod tube annular space 23 with pipe box annular space 25, the cross-section area in the space of sucker rod 3 inside is less, do not need power, the pressure in coal seam can make the draining of sucker rod 3 aerogenesis.
Sucker rod 3 can be connected in sequence by short hollow rod, also can be coiled tubing and little oil pipe, or other roofbolts with inner passage are formed.
This rod pump equipment can adopt two kinds of production schemes, select suitable production scheme according to the change of water yield, two kinds of production schemes can realize continuous conversion, carry out continuous, stable step-down draining to pit shaft, do not need workover eration, thus the continuous and stable production of coal bed gas well can be ensured.
This equipment by the space mining of sucker rod 3 inside, does not need power, the energy of coal-seam gas can be utilized to carry out draining after changing production scheme, without the need to increasing operating cost, and obvious energy conservation.During by sucker rod 3 mining, do not need sucker rod 3 to move, thus the phenomenon of rod and tube partial-wear can be avoided.
Concrete, the intercommunicating pore of plunger 42 upper shell can arrange one-way valve 43, and one-way valve 43 is to unilaterally connected outside plunger 42.
Fig. 3 does not establish the schematic diagram in the plunger 42 upstroke process of one-way valve 43, and Fig. 4 is provided with the schematic diagram in the plunger 42 down stroke process of one-way valve 43, and wherein, Fig. 3 and Fig. 4 is and underground bushing 5 is shown.
During upstroke, sucker rod 3 is up with plunger 42, and one-way valve 43 is closed, and the liquid on the upside of plunger 42 can not enter plunger 42, and the traveling valve bottom pump barrel 41 is opened, and the liquid in shaft bottom is inhaled in pump barrel 41;
During down stroke, sucker rod 3 and plunger 42 descending, the traveling valve bottom plunger 42 and one-way valve 43 are opened, traveling valve bottom pump barrel 41 cuts out, the traveling valve of current in pump barrel 41 bottom plunger 42, the one-way valve 43 of upper shell enters plunger 42 inside, namely rod tube annular space 23.
Concrete, at the mining initial stage, need plugging structure 31 to make sucker rod 3 keep sealing, equipment works with the first production scheme, when needing to be converted to the second production scheme, open plugging structure 31, weight can be dropped into sucker rod 3 inside, by with certain velocity shock plugging structure 31 when weight falls, plugging structure 31 be opened, weight can be iron ball or crooked chisel, and plugging structure 31 can be following structure.
One preferred embodiment in, plugging structure 31 comprises plugging plate 32 and backplate 33, and plugging plate 32 and backplate 33 are fixedly arranged on the inwall of sucker rod 3; Plugging plate 32 is provided with impact fracture portion, so that when dropping into weight to sucker rod 3 inside, plugging plate 32 can rupture along impact fracture portion and come off; Backplate 33 is positioned at the downside of plugging plate 32, and object can be avoided to fall into down-hole.
This coal-bed gas exploitation equipment is with in the first production scheme working procedure, plugging plate 32 can seal sucker rod 3 lower end, when water yield reduces to a certain degree, when needing to change production scheme, weight can be dropped in sucker rod 3, plugging plate 32 is provided with impact fracture portion, weight does the movement of falling object, and when clashing into plugging plate 32 with certain speed, plugging plate 32 can rupture along impact fracture portion, and come off together with weight, open plugging structure 31.
The effect being positioned at the backplate 33 on the downside of plugging plate 32 prevents object from falling into down-hole, and can prevent plugging plate 32 and weight from falling into down-hole, backplate 33 plays the effect of protective cradle, and the water of down-hole and gas can pass through backplate 33.
The structure of backplate 33 can be part plectane, the pertusate plectane of tool or the structure for support frame type.
Concrete, as shown in Figure 5, impact fracture portion is the fracture groove 34 of the annular of plugging plate 32 perimembranous.When weight clashes into plugging plate 32, plugging plate 32 can rupture along the fracture groove 34 of its perimembranous, and center portion and the weight of the plugging plate 32 ruptured together come off.
Preferably, the corresponding position of plugging plate about 32 both sides is equipped with fracture groove 34.
According to the principle that stress is concentrated, utilize fracture mechanics, structure that ballistics calculates plugging plate 32, the plugging plate 32 with fracture groove 34 has certain intensity, when the first production scheme, the sealing of sucker rod 3 can be ensured, simultaneously, when needing to use sucker rod 3 to carry out mining, in sucker rod 3, drop into weight, during heavy impact plugging plate 32, can be swept away, along the fracture of fracture groove, jointly fall on backplate 33, open annular space, conversion production scheme.
In the above-described embodiment, the interior welds of plugging plate 32 and/or backplate 33 and sucker rod 3.
It is inner that plugging plate 32 and backplate 33 are all installed in sucker rod 3, and plugging plate 32 is positioned on the upside of backplate 33, and the two is at a distance of certain distance.Backplate 33 can be not shutoff sucker rod 3, and object can be avoided to fall into the structure of down-hole.
In another preferred embodiment, plugging structure 31 is for being arranged on the down-hole switch in sucker rod 3, and shutoff sucker rod 3 when down-hole switch is closed, down-hole switch can be triggered by weight and open or close.
As shown in Figure 6, plugging structure 31 can be down-hole switch, this down-hole switch has closedown, opens two states, when being in closed condition, shutoff sucker rod 3, when needing conversion production scheme, drops into weight in sucker rod 3, touch down-hole switch and be converted into opening state, then form the passage of sucker rod 3 mining.
Concrete, down-hole switch comprises cock 35 and cooperating structure 36 thereof, and cooperating structure 36 is located at the inwall of sucker rod 3, has the center hole coordinated with cock 35; When weight triggers cock 35, cock 35 can turn an angle, and changes the state of down-hole switch.
Cooperating structure 36 is located at the inside of sucker rod 3, and cooperating structure 36 has the center hole coordinated with cock 35, and when center hole and cock 35 proper engagement, down-hole switch is closed, and keeps sealing; When cock 35 turns an angle, down-hole switch can be opened; When cock 35 is rotated further several angle again, down-hole switch returns to closed condition.
Cock 35 can for having hole and rotatable taper embolism, when the hole of cock 35 be engaged completely structure 36 block time, fluid just not by, down-hole switch is closed; When cock 35 turns an angle, when the hole of cock 35 is just towards the center hole of cooperating structure 36, down-hole switch is opened, fluid just by.In the device, only down-hole switch need be opened.
In a kind of concrete mode of execution, the downside of cooperating structure 36 has chisel teeth, and the downside of cock 35 has the projection coordinated with chisel teeth, and when weight triggers cock 35, projection can move along the inclined-plane of chisel teeth, to make cock 35 rotate.
As shown in Figure 6, when weight touches cock 35, cock 35 moves down, in moving process, due to the gas pressure of downside, the projection of cock 35 is moved along the inclined-plane of chisel teeth, rotate around the axis of self while cock 35 is moved down, after projection moves to the crown of chisel teeth, cock 35 stops moving down, and the gas pressure of downside can make projection move along the opposite side inclined-plane of chisel teeth, stops operating when moving at the bottom of another tooth, cock 35 just turns over several angle, and down-hole switch is unlocked; Repeat above-mentioned action, when cock 35 continues to revolve through several angle, can down-hole switch be closed.
Above the rod pump equipment for coal-bed gas exploitation provided by the utility model is described in detail.Apply specific case herein to set forth principle of the present utility model and mode of execution, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (9)
1., for a rod pump equipment for coal-bed gas exploitation, comprise pumping unit (1), oil pipe (2), sucker rod (3) and rod pump (4); The bottom of described oil pipe (2) is positioned at underground bushing (5), forms pipe box annular space (25); The bottom of described sucker rod (3) is positioned at described oil pipe (2), forms rod tube annular space (23); Described rod pump (4) comprises the pump barrel (41) and plunger (42) that match, described pump barrel (41) is positioned at the lower end of described oil pipe (2) and is communicated with described oil pipe (2), the bottom of described pump barrel (41) and the bottom of described plunger (42) are equipped with traveling valve, and the upper shell of described plunger (42) has intercommunicating pore; Described pumping unit (1) rest on the ground, and described plunger (42) can be driven to move reciprocatingly by described sucker rod (3); It is characterized in that, described sucker rod (3) is hollow structure, described sucker rod (3) is provided with openable plugging structure (31) with the joint of described plunger (42), so that after closing described pipe box annular space (25) and described rod tube annular space (23) successively, when opening described plugging structure (31), by the inside mining of described sucker rod (3).
2. as claimed in claim 1 for the rod pump equipment of coal-bed gas exploitation, it is characterized in that, the described intercommunicating pore of the upper shell of described plunger (42) is provided with one-way valve (43), and described one-way valve (43) is to described plunger (42) outside unilaterally connected.
3. as claimed in claim 1 or 2 for the rod pump equipment of coal-bed gas exploitation, it is characterized in that, described plugging structure (31) comprises plugging plate (32) and backplate (33), and described plugging plate (32) and described backplate (33) are fixedly arranged on the inwall in described sucker rod (3); Described plugging plate (32) is provided with impact fracture portion, so that when dropping into weight to described sucker rod (3) inside, described plugging plate (32) can rupture along described impact fracture portion and come off; Described backplate (33) is positioned at the downside of described plugging plate (32), and object can be avoided to fall into down-hole.
4., as claimed in claim 3 for the rod pump equipment of coal-bed gas exploitation, it is characterized in that, described impact fracture portion is the fracture groove (34) of the annular of described plugging plate (32) perimembranous.
5. as claimed in claim 4 for the rod pump equipment of coal-bed gas exploitation, it is characterized in that, the corresponding position of the upper and lower both sides of described plugging plate (32) is equipped with described fracture groove (34).
6. as claimed in claim 5 for the rod pump equipment of coal-bed gas exploitation, it is characterized in that, the interior welds of described plugging plate (32) and/or described backplate (33) and described sucker rod (3).
7. as claimed in claim 1 or 2 for the rod pump equipment of coal-bed gas exploitation, it is characterized in that, described plugging structure (31) is for being arranged on the down-hole switch in described sucker rod (3), sucker rod (3) described in shutoff when described down-hole switch is closed, described down-hole switch can be triggered by weight and open or close.
8. as claimed in claim 7 for the rod pump equipment of coal-bed gas exploitation, it is characterized in that, described down-hole switch comprises cock (35) and cooperating structure (36) thereof, described cooperating structure (36) is located at the inwall of described sucker rod (3), has the center hole coordinated with described cock (35); When described weight triggers described cock (35), described cock (35) can turn an angle, to open or to close described down-hole switch.
9. as claimed in claim 8 for the rod pump equipment of coal-bed gas exploitation, it is characterized in that, the downside of described cooperating structure (36) has chisel teeth, the downside of described cock (35) has the projection coordinated with described chisel teeth, when described weight triggers described cock (35), described projection can move along the inclined-plane of described chisel teeth, to make described cock (35) rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520182717.2U CN204572406U (en) | 2015-03-27 | 2015-03-27 | A kind of rod pump equipment for coal-bed gas exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520182717.2U CN204572406U (en) | 2015-03-27 | 2015-03-27 | A kind of rod pump equipment for coal-bed gas exploitation |
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| Publication Number | Publication Date |
|---|---|
| CN204572406U true CN204572406U (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520182717.2U Withdrawn - After Issue CN204572406U (en) | 2015-03-27 | 2015-03-27 | A kind of rod pump equipment for coal-bed gas exploitation |
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| CN (1) | CN204572406U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763621A (en) * | 2015-03-27 | 2015-07-08 | 中联煤层气有限责任公司 | Sucker-rod pump device for coal seam gas exploitation |
| CN111485871A (en) * | 2020-04-15 | 2020-08-04 | 煤炭科学技术研究院有限公司 | Pressure transmission cylinder for steady-flow anti-blocking test of capillary tube of coal-bed gas well |
| CN114320443A (en) * | 2021-12-24 | 2022-04-12 | 安徽理工大学 | This coal seam gas drainage device |
-
2015
- 2015-03-27 CN CN201520182717.2U patent/CN204572406U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763621A (en) * | 2015-03-27 | 2015-07-08 | 中联煤层气有限责任公司 | Sucker-rod pump device for coal seam gas exploitation |
| CN111485871A (en) * | 2020-04-15 | 2020-08-04 | 煤炭科学技术研究院有限公司 | Pressure transmission cylinder for steady-flow anti-blocking test of capillary tube of coal-bed gas well |
| CN111485871B (en) * | 2020-04-15 | 2024-06-11 | 煤炭科学技术研究院有限公司 | Pressure transmission cylinder for steady-flow anti-blocking test of capillary tube of coal-bed gas well |
| CN114320443A (en) * | 2021-12-24 | 2022-04-12 | 安徽理工大学 | This coal seam gas drainage device |
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Granted publication date: 20150819 Effective date of abandoning: 20171114 |