CN214403532U - Expanding type variable-diameter plunger - Google Patents
Expanding type variable-diameter plunger Download PDFInfo
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- CN214403532U CN214403532U CN202120257547.5U CN202120257547U CN214403532U CN 214403532 U CN214403532 U CN 214403532U CN 202120257547 U CN202120257547 U CN 202120257547U CN 214403532 U CN214403532 U CN 214403532U
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Abstract
The utility model belongs to oil gas field well head equipment field, concretely relates to expanding type variable diameter plunger. The device comprises a plunger transmission cylinder, wherein a push rod is arranged in the plunger transmission cylinder; one end of the transmission rod is connected with the push rod, the push rod can drive the transmission rod to stretch and retract along the axial direction, and the diameter of one end, close to the push rod, of the transmission rod is larger than that of one end, far away from the push rod, of the transmission rod; the tubular plug part is sleeved outside the transmission rod, the upper end of the plug part is fixedly connected with the plunger transmission cylinder, and the lower end of the plug part is fixedly connected with the transmission rod; and the buffer device is arranged at the bottom of the transmission rod. The utility model has the advantages that: by arranging the plug part which can be changed in the radial direction, the liquid discharging efficiency is obviously improved; the plug part is extruded by the sliding block to change diameter so as to be tightly attached to the wall of the oil pipe, and the leakage of liquid carrying is reduced.
Description
Technical Field
The utility model belongs to oil gas field well head equipment field, concretely relates to expanding type variable diameter plunger.
Background
Along with the gas well exploitation entering the middle and later stages, the water in the shaft is accumulated due to the propelling of bottom water in the well and the operation measures such as fracturing and acidizing. And the yield and the pressure of the gas well are gradually reduced, the liquid carrying capacity is gradually deteriorated, and liquid accumulation and water flooding at the bottom of the well are more and more frequent.
Along with the exhaustion of the stratum energy of the gas field, the effect of the main drainage and production process is gradually reduced year by year, so that the accumulated liquid of the gas well cannot be timely discharged, and the stable yield capability of the gas well is influenced. The gas well is seriously polluted by partial liquid drainage gas production process (such as a foam drainage gas production process), and the applicability of a process system is gradually deteriorated.
At present, the commonly used plunger type gas lift needs to change the ground flow, frequently closes the well, forms intermittent production, influences the yield, has large leakage of liquid carrying, and has low liquid discharge efficiency.
The existing intelligent plunger rod adopts pressure difference to control the plunger to change the diameter, has high requirement on bottom hole pressure and has low reliability.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a variable footpath plunger of expanding.
The expanding variable diameter plunger comprises:
the plunger transmission cylinder is internally provided with a push rod;
one end of the transmission rod is connected with the push rod, the push rod can drive the transmission rod to stretch and retract along the axial direction, and the diameter of one end, close to the push rod, of the transmission rod is larger than that of one end, far away from the push rod, of the transmission rod;
the tubular plug part is sleeved outside the transmission rod, the upper end of the plug part is fixedly connected with the plunger transmission cylinder, and the lower end of the plug part is fixedly connected with the transmission rod;
and the buffer device is arranged at the bottom of the transmission rod and used for buffering the falling impact force of the plunger.
Furthermore, the top of the plunger transmission cylinder is connected with a plunger control cylinder, the top of the plunger control cylinder is sealed, the bottom of the plunger control cylinder is open, and a controller is arranged in the plunger control cylinder.
Further, the plunger transmission cylinder comprises a first cavity and a second cavity, a sensor is arranged in the first cavity, a push rod is arranged in the second cavity, and the controller is in signal connection with the sensor and the push rod respectively.
Further, the sensor is used for collecting underground pressure and temperature parameters and feeding the underground pressure and temperature parameters back to the controller for storage, and meanwhile, the controller controls the push rod to work.
Further, plunger control barrel top fixedly connected with plunger head, the plunger head includes integrated into one piece's battery compartment and salvages the head, be equipped with the battery in the battery compartment.
Furthermore, a groove is formed in the middle of the fishing head and used for fishing the variable-diameter plunger.
Furthermore, the bottom of the plunger transmission cylinder is fixedly connected with a joint, and the joint is fixed with the upper end of the plug part.
Further, an output shaft of the push rod penetrates through the joint to be fixedly connected with the transmission rod.
The plug portion is made of one of fluororubber, nitrile rubber and hydrogenated butadiene-acrylonitrile rubber.
Furthermore, the buffer device comprises a buffer groove, a mandrel is fixed in the buffer groove, a spring is arranged on the outer side of the mandrel, and the top of the spring is fixed with the top of the buffer groove;
the buffer column is sleeved on the outer side of the mandrel and can move axially along the mandrel; the bottom of the buffer slot is fixed with a fixed cover, and the top of the buffer column is fixed in the buffer slot
The utility model aims at solving through the following technical scheme:
compared with the prior art, the utility model provides a technical scheme includes following beneficial effect:
1. by arranging the plug part which can be changed in the radial direction, the liquid discharging efficiency is obviously improved;
2. the plug part is extruded by the sliding block to change diameter so as to be tightly attached to the wall of the oil pipe, so that the leakage of liquid carrying is reduced;
3. the utility model discloses still be equipped with sensor and controller, the sensor can gather pressure in the pit, temperature parameter feedback and give the controller, and the motor is controlled according to the parameter of feedback to the controller, realizes the reducing flowing back, can effectual intelligence reducing like this, and is more efficient.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic view of the apparatus of the present invention;
FIG. 2 is a schematic view of the downward structure of the plunger of the present invention;
fig. 3 is a schematic diagram of the structure of the plunger of the present invention.
Wherein: 1 is a plunger transmission cylinder; 11 is a push rod; 12 is a sensor; 2 is a transmission rod; 3 is a plug part; 4 is a plunger control cylinder; 41 is a controller; 5 is a plunger head; 51 is a battery chamber; 52 is a fishing head; 6 is a joint; 7 is a buffer device; 71 is a mandrel; 72 is a spring; 73 is a buffer column; 74 is a fixed cover.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the following claims.
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments.
Referring to fig. 1, the expanding type variable diameter plunger comprises a plunger transmission cylinder 1, wherein a push rod 11 is arranged in the plunger transmission cylinder; one end of the transmission rod 2 is connected with a push rod 11, the push rod 11 can drive the transmission rod 2 to stretch and retract along the axial direction, and the diameter of one end, close to the push rod 11, of the transmission rod 2 is larger than that of one end, far away from the push rod 11, of the transmission rod 2;
a tubular plug part 3 which is sleeved outside the transmission rod 2, the upper end of the plug part is fixedly connected with the plunger transmission cylinder 1, and the lower end of the plug part is fixedly connected with the transmission rod 2;
and the buffer device 7 is arranged at the bottom of the transmission rod 2 and used for buffering the falling impact force of the plunger.
When the push rod 11 drives the transmission rod 2 to move downwards along the axial direction, the transmission rod 2 can prop the plug part 3 open due to the fact that the diameter of the transmission rod 2 is large at the top and small at the bottom, and the diameter of the plug part in the radial direction is enlarged.
Further, a plunger control cylinder 4 is connected to the top of the plunger transmission cylinder 1, the top of the plunger control cylinder 4 is sealed, the bottom of the plunger control cylinder is open, and a controller 41 is arranged inside the plunger control cylinder. Specifically, the plunger transmission cylinder 1 is connected with the plunger control cylinder 4 through threads.
Further, the plunger transmission cylinder 1 comprises a first cavity and a second cavity, and specifically, the first cavity and the second cavity are integrally formed; a sensor 12 is arranged in the first cavity, a push rod 11 is arranged in the second cavity, and the controller 41 is in signal connection with the sensor 12 and the push rod 11 respectively.
Further, the sensor 12 is used for collecting downhole pressure and temperature parameters and feeding the parameters back to the controller 41 for storage, and meanwhile, the controller 41 controls the push rod 11 to work.
Further, a plunger head 5 is fixedly connected to the top of the plunger control barrel 4, the plunger head 5 comprises a battery compartment 51 and a fishing head 52 which are integrally formed, and a battery is arranged in the battery compartment 51. Specifically, the plunger control barrel 4 is provided with a protrusion on the top, the outside of the protrusion is provided with a screw thread, the plunger control barrel 4 is connected with the plunger head 5 through the screw thread, and the battery in the battery compartment 51 is fixed in the battery compartment 51 through the protrusion.
Further, a groove is formed in the middle of the fishing head 52 and used for fishing the variable-diameter plunger.
Further, the bottom of the plunger transmission cylinder 1 is fixedly connected with a joint 6, and the joint 6 is also fixed with the upper end of the plug part 3. Specifically, the top of the joint 6 is in threaded connection with the plunger transmission cylinder 1, and the bottom of the joint is fixed with the plug part 3 through gluing.
Further, an output shaft of the push rod 11 passes through the joint 6 to be fixedly connected with the transmission rod 2. Specifically, the output shaft of the push rod 11 is fixedly connected through the transmission rod 2.
The plug 3 is made of a high temperature and wear resistant material, and specifically, the plug 3 is made of one of fluororubber, nitrile rubber and hydrogenated butadiene-acrylonitrile rubber, or PTFE and copper powder.
Specifically, when the radial size of the plug part is increased, the distance between the plug part and the inner diameter of the oil pipe is 0.15-0.5 mm, so that the liquid discharge rate can be ensured, and the plunger can smoothly move upwards.
Furthermore, the transmission rod extends downwards and is provided with a buffer groove, a mandrel 71 is fixed in the buffer groove through internal threads, a spring 72 is arranged on the outer side of the mandrel, and the top of the spring is fixed with the top of the buffer groove.
Further, a buffer column 73 is sleeved on the outer side of the mandrel 71, and the buffer column 73 can axially move along the mandrel 71; a fixing cover 74 is screwed to the bottom of the buffer tank, and the top of the buffer column 73 is fixed in the buffer tank.
When the plunger falls to the bottom of the oil pipe, the buffer column contacts the bottom, impact force can be buffered through the action of the spring, and the damage degree of the plunger is reduced.
The utility model discloses a theory of operation does: referring to fig. 2 and 3, a plunger is put into an oil pipe, the plunger falls down on the inner wall of the oil pipe under the action of gravity, the pressure sensor 12 detects that the pressure changes suddenly in the falling process, which indicates that the pressure enters the accumulated liquid in the oil pipe at the moment, when the pressure reaches a set value, the sensor 12 sends a signal to the controller 41, the controller 41 controls the push rod 11 to work, the push rod 11 drives the transmission rod 2 to move downwards, the diameter of the plug part 3 can be enlarged due to the fact that the diameter of the upper end of the transmission rod 2 is larger than that of the lower end of the transmission rod, and then the plug part is tightly attached to the wall of the oil pipe, so that the falling speed of the plunger is slowed down, an upper closed interface and a lower closed interface are formed in the oil pipe after the diameter of the plug part 3 is reduced, and the plunger gradually stops in the oil pipe. When formation pressure continues to increase, the pressure at the lower part of the plug part 3 of the plunger is increased along with the increase of the formation pressure, the plunger and liquid at the upper part of the plunger are pushed to move upwards, and after the liquid reaches a wellhead, the liquid column reaches a surface oil pipe and is discharged. Then the controller 41 controls the push rod 11 to work, the push rod 11 moves upwards, the outer diameter of the plug part 3 becomes smaller, and the plunger falls down on the inner wall of the oil pipe under the action of gravity to perform next liquid discharge.
The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
Claims (10)
1. An expanding variable diameter plunger, comprising:
the plunger transmission cylinder (1) is internally provided with a push rod (11);
one end of the transmission rod (2) is connected with a push rod (11), the push rod (11) can drive the transmission rod (2) to stretch and retract along the axial direction, and the diameter of one end, close to the push rod (11), of the transmission rod (2) is larger than that of one end, far away from the push rod (11);
the tubular plug part (3) is sleeved on the outer side of the transmission rod (2), the upper end of the plug part is fixedly connected with the plunger transmission cylinder (1), and the lower end of the plug part is fixedly connected with the transmission rod (2);
and the buffer device (7) is arranged at the bottom of the transmission rod (2) and is used for buffering the impact force of the falling plunger.
2. The expanding type variable diameter plunger according to claim 1, wherein a plunger control cylinder (4) is connected to the top of the plunger transmission cylinder (1), the plunger control cylinder (4) is sealed at the top and is open at the bottom, and a controller (41) is arranged inside the plunger control cylinder.
3. The expanding type variable-diameter plunger piston according to claim 2, wherein the plunger piston transmission cylinder (1) comprises a first cavity and a second cavity, a sensor (12) is arranged in the first cavity, a push rod (11) is arranged in the second cavity, and the controller (41) is in signal connection with the sensor (12) and the push rod (11) respectively.
4. The expanding variable-diameter plunger according to claim 3, wherein the sensor (12) is used for collecting downhole pressure and temperature parameters and feeding the downhole pressure and temperature parameters back to the controller (41) for storage, and the controller (41) controls the push rod (11) to work.
5. The expanding type variable-diameter plunger according to claim 2, wherein a plunger head (5) is fixedly connected to the top of the plunger control barrel (4), the plunger head (5) comprises a battery compartment (51) and a fishing head (52) which are integrally formed, and a battery is arranged in the battery compartment (51).
6. The expanding variable diameter plunger according to claim 5, wherein a groove is formed in the middle of the fishing head (52) for fishing the variable diameter plunger.
7. The expanding type variable diameter plunger according to claim 1, wherein a joint (6) is fixedly connected to the bottom of the plunger transmission cylinder (1), and the joint (6) is further fixed to the upper end of the plug portion (3).
8. The pop-up variable diameter plunger of claim 7, wherein the output shaft of the push rod (11) passes through the joint (6) and is fixedly connected with the transmission rod (2).
9. The expanding type variable diameter plunger according to claim 1, wherein the material of the plug portion (3) is any one of fluororubber, nitrile rubber and hydrogenated butadiene-acrylonitrile rubber.
10. The expanding type variable diameter plunger according to claim 1, wherein the buffer device (7) comprises a buffer groove, a mandrel (71) is fixed inside the buffer groove, a spring (72) is arranged outside the mandrel (71), and the top of the spring is fixed with the top of the buffer groove;
the buffer column (73) is sleeved on the outer side of the mandrel (71) and can axially move along the mandrel (71); a fixing cover (74) is fixed at the bottom of the buffer slot, and the top of the buffer column (73) is fixed in the buffer slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120257547.5U CN214403532U (en) | 2021-01-29 | 2021-01-29 | Expanding type variable-diameter plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120257547.5U CN214403532U (en) | 2021-01-29 | 2021-01-29 | Expanding type variable-diameter plunger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214403532U true CN214403532U (en) | 2021-10-15 |
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ID=78019802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120257547.5U Active CN214403532U (en) | 2021-01-29 | 2021-01-29 | Expanding type variable-diameter plunger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214403532U (en) |
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2021
- 2021-01-29 CN CN202120257547.5U patent/CN214403532U/en active Active
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