CN114718509A - Wax-proof and scale-proof device for oil well - Google Patents
Wax-proof and scale-proof device for oil well Download PDFInfo
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- CN114718509A CN114718509A CN202110006575.4A CN202110006575A CN114718509A CN 114718509 A CN114718509 A CN 114718509A CN 202110006575 A CN202110006575 A CN 202110006575A CN 114718509 A CN114718509 A CN 114718509A
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- oil well
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
Abstract
The application provides an oil well wax control anti fouling device belongs to borehole operation technical field. This application is through installing the device between two sucker rods, along with lifting the pump and running into the pit shaft with the sucker rod, the device also can be followed the pit shaft, make each water conservancy diversion nozzle pressurize the mixed liquid in the pit shaft, after the speed-up, force the mixed liquid to spout to each first reed, each first reed loses the balance and vibrates and send the sound wave under the effect of high-speed jet, and the same is said, when lifting the pump and pulling out the sucker rod pit shaft, each water conservancy diversion nozzle forces the mixed liquid to spout to each second reed, each second reed relies on to vibrate and sends the sound wave, because the sound wave can change the surface activity of incrustation scale crystalline state when propagating in the mixed liquid, consequently can improve the pit shaft effectively and lift the in-process condition of inner wall scale, wax crystallization, and because do not rely on chemical, can accord with the green production demand in oil field.
Description
Technical Field
The application relates to the technical field of downhole operation, in particular to an oil well paraffin control and scale prevention device.
Background
In the process of petroleum and natural gas exploration and development, mixed liquid in an oil layer flows into a shaft by means of formation pressure, the mixed liquid is pumped to the ground from the shaft by means of a lifting pump, and then the mixed liquid is subjected to outward transportation, centralized treatment and the like. Because the temperature of the shaft is gradually reduced from bottom to top, mineralized substances, wax and the like contained in the mixed liquid produced by the shaft can be continuously separated out and crystallized, the mineralized substances are called scales after being crystallized, and the wax is called paraffin after being crystallized. The scale and paraffin are attached to the inner wall of the shaft, and are continuously increased and thickened along with the lapse of time, so that the effective flow cross section in the shaft is finally reduced, the yield of an oil well is influenced, and the energy consumption of a lifting pump is increased.
At present, wax control and scale control can be realized to a certain extent by adding a medicament into a shaft, but the medicament is high in cost, difficult to manage and environment-friendly, and does not meet the green production requirement of an oil field, so that a device capable of improving the scale on the inner wall and wax crystallization in the shaft lifting process is urgently needed.
Disclosure of Invention
The embodiment of the application provides an oil well wax control scale control device, can improve the pit shaft and lift in-process inner wall scale deposit, wax crystallization, and accord with the green production demand in oil field. The wax-proof and scale-proof device for the oil well comprises the following components:
an oil well wax scale control device, comprising: the two-way flow guide nozzle comprises a connecting piece, a connecting rod, a supporting sleeve, a first reed frame, a first reed group, a two-way flow guide nozzle, a second reed frame and a second reed group;
the connecting piece is used for connecting a sucker rod, the top end of the connecting piece is connected with the sucker rod, and the bottom end of the connecting piece is connected with the connecting rod;
the connecting rod is used for supporting each component of the oil well wax and scale prevention device, and extends into the supporting sleeve;
the support sleeve is used for fixing the first reed frame on the connecting rod, and the size of the support sleeve is matched with that of the connecting rod;
the first reed frame is used for fixing the first reed group on the connecting rod, the first reed frame is sleeved outside the connecting rod and comprises a first tubular part and a plurality of first rib frames, the plurality of first rib frames are connected with the first tubular part and extend along the radial direction of the first tubular part, and each first rib frame is provided with a first groove;
the first reed group is used for sending out sound waves by means of vibration and comprises a plurality of first reeds, and each first reed is fixedly connected with the first groove on one first rib frame;
the bidirectional diversion nozzle is used for guiding the mixed liquor to gather and pressurizing and accelerating the mixed liquor, and comprises a second tubular part and a plurality of diversion nozzles, and the diversion nozzles are connected with the second tubular part and extend along the radial direction of the second tubular part;
the second reed frame is used for fixing the second reed group on the connecting rod, the second reed frame is sleeved outside the connecting rod and comprises a third tubular part and a plurality of second rib frames, the second rib frames are connected with the third tubular part and extend along the radial direction of the third tubular part, and each second rib frame is provided with a second groove;
the second reed group is used for sending out sound waves by means of vibration and comprises a plurality of second reeds, and each second reed is fixedly connected with the second groove in one second rib frame.
In one possible embodiment, the oil well anti-wax scale control device further comprises a first centralizer;
the first centralizer is used for guiding the connecting rod, the first centralizer is located between the connecting piece and the connecting rod, the top end of the first centralizer is connected with the bottom end of the connecting piece, and the bottom end of the first centralizer is connected with the top end of the connecting rod.
In a possible implementation manner, the first centralizer includes a first cylindrical portion and a first centralizing block, a top end of the first cylindrical portion is in threaded connection with the connecting member, a bottom end of the first cylindrical portion is in threaded connection with the connecting rod, and the first centralizing block is sleeved outside the first cylindrical portion.
In one possible embodiment, the oil well anti-wax scale control device further comprises a second centralizer;
the second centralizer is used for guiding the connecting rod, the top end of the second centralizer is connected with the connecting rod, and the bottom end of the second centralizer is connected with the sucker rod.
In a possible implementation manner, the second centralizer includes a second cylindrical portion and a second centralizing block, the top end of the second cylindrical portion is in threaded connection with the connecting rod, the bottom end of the second cylindrical portion is in threaded connection with the sucker rod, and the second centralizing block is sleeved outside the second cylindrical portion.
In a possible embodiment, the plurality of first bead supports are evenly distributed along the axial direction of the first tubular portion.
In a possible embodiment, the angle between adjacent first rib frames is 90 degrees.
In a possible embodiment, the plurality of second bead frames are evenly distributed along the axial direction of the second tubular portion.
In a possible embodiment, the angle between adjacent second rib frames is 90 degrees.
In a possible embodiment, each first spring leaf is anchored with the first groove on a first frame by means of rivets; each second spring leaf is anchored with the second groove on a second frame by rivets.
The oil well wax control anti fouling device that this application embodiment provided's beneficial effect includes at least:
the oil well wax-proof and scale-proof device is installed between the two oil pumping rods, the oil well wax-proof and scale-proof device can also be put into the shaft along with the lifting pump, so that the mixed liquid in the shaft is pressurized by each guide nozzle and is forced to be sprayed to each first reed after the lifting pump lifts, each first reed loses balance under the action of high-speed jet flow and vibrates to send out sound waves, and similarly, when the lifting pump pulls the oil pumping rod out of the shaft, each guide nozzle forces the mixed liquid to be sprayed to each second reed, each second reed vibrates and sends out sound waves, and the surface activity of scale crystal grain states can be changed when the sound waves are propagated in the mixed liquid, so that the conditions of scale on the inner wall and wax crystallization in the lifting process of the shaft can be effectively improved, and the oil field green production requirements can be met due to the fact that the oil well wax-proof and scale-proof device does not depend on chemical agents.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an oil well wax scale prevention device provided by an embodiment of the application.
Wherein the reference numerals in the drawings are explained as follows:
1 connecting piece, 2 connecting rod, 3 supporting sleeve, 4 first reed frame, 5 first reed group,
6 bidirectional diversion nozzles, 7 second reed frames, 8 second reed groups, 9 first centralizers,
10 second centralizer.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of an oil well wax scale prevention device provided by an embodiment of the application. Referring to fig. 1, the oil well anti-wax and anti-scale device provided by the embodiment comprises: connecting piece 1, connecting rod 2, support cover 3, first reed frame 4, first reed group 5, two-way water conservancy diversion nozzle 6, second reed frame 7, second reed group 8, first centralizer 9 and second centralizer 10, below, respectively to each structure detailing:
connecting piece 1
The connecting piece 1 is used for connecting a sucker rod, the top end of the connecting piece 1 is connected with the sucker rod, and the bottom end of the connecting piece 1 is connected with the connecting rod 2.
That is to say, this connecting piece 1 is used for carrying out fixed connection with whole oil well wax control anti fouling device and sucker rod, and the pump that lifts of being convenient for drives whole oil well wax control anti fouling device and lifts along with the sucker rod when lifting the sucker rod.
In some embodiments, since the top end of the connecting member 1 is connected to the sucker rod, the connecting means used for connecting the two comprises: welding, threaded connection, rivet connection or flange joint, this application embodiment do not specifically prescribe a limit to the connected mode that adopts between connecting piece 1 and the sucker rod.
For example, this connecting piece 1 and sucker rod welding can guarantee fixed connection's compactness, perhaps, this connecting piece 1 and sucker rod threaded connection can easy to assemble and dismantlement, perhaps, this connecting piece 1 and sucker rod riveted joint equally can easy to assemble and dismantle, perhaps, this connecting piece 1 and sucker rod flange joint equally can easy to assemble and dismantle.
In an exemplary embodiment, the connecting member 1 is a sucker rod coupling, which is a connecting member designed for connecting a rod string of a sucker rod, for example, the sucker rod coupling is a tubular structure (i.e., a hollow cylinder), the outer diameter of the sucker rod coupling is phi 46mm, the inner diameter of the sucker rod coupling is phi 22mm, the sucker rod coupling is in threaded connection with the sucker rod, at this time, a female buckle (i.e., an internal thread) can be opened on the inner wall of the top end of the sucker rod coupling, so that the male buckle (i.e., an external thread) on the bottom end of the sucker rod coupling can be in threaded connection with the female buckle, i.e., the sucker rod extends into the sucker rod coupling and is matched with the size of the sucker rod coupling.
In some embodiments, the bottom end of the connecting piece 1 is directly connected with the top end of the connecting rod 2, so that the structural composition of the oil well wax-proof and scale-proof device can be simplified, and the production and the manufacture of the oil well wax-proof and scale-proof device are facilitated.
In other embodiments, the bottom end of the link 1 is connected to the top end of the connecting rod 2 by means of a first centralizer 9, i.e. the link 1 is not directly connected to the connecting rod 2 but indirectly connected to the connecting rod by means of the first centralizer 9, the structure of which first centralizer 9 will be described below.
(II) first centralizer 9
The first centralizer 9 is used for guiding the connecting rod 2, the first centralizer 9 is positioned between the connecting piece 1 and the connecting rod 2, the top end of the first centralizer 9 is connected with the bottom end of the connecting piece 1, and the bottom end of the first centralizer 9 is connected with the top end of the connecting rod 2.
The first centralizer 9 is positioned at the upper half part of the whole oil well wax and scale prevention device, so the first centralizer can also be called as an 'upper centralizer', the first centralizer 9 is a guide part designed for the lower connecting rod 2 of the upper connecting part 1 and is used for ensuring that the sucker rod and the oil well wax and scale prevention device are positioned at the center of a shaft and avoiding unnecessary abrasion caused by mutual collision with other sleeved underground tools.
In some embodiments, since the top end of the first centralizer 9 is connected with the bottom end of the connecting member 1, the connection method adopted by the two comprises the following steps: welding, threaded connection, rivet connection or flange joint, this application embodiment does not specifically limit the connected mode that adopts between first centralizer 9 and the connecting piece 1.
For example, the top of this first centralizer 9 and the bottom welding of this connecting piece 1 can guarantee fixed connection's compactness, perhaps, the top of this first centralizer 9 and the bottom threaded connection of this connecting piece 1, can easy to assemble and dismantle, perhaps, the top of this first centralizer 9 and the bottom riveted connection of this connecting piece 1, equally can easy to assemble and dismantle, perhaps, the top of this first centralizer 9 and the bottom flange connection of this connecting piece 1, equally can easy to assemble and dismantle.
In some embodiments, since the bottom end of the first centralizer 9 is connected to the top end of the connecting rod 2, the connection method adopted by the two comprises: welding, threaded connection, rivet connection or flange joint, this application embodiment do not specifically prescribe a limit to the connected mode that adopts between first centralizer 9 and connecting rod 2.
For example, the bottom of this first centralizer 9 and the top welding of this connecting rod 2, can guarantee fixed connection's compactness, or, the bottom of this first centralizer 9 and the top threaded connection of this connecting rod 2, can easy to assemble and dismantle, or, the bottom of this first centralizer 9 and the top riveted connection of this connecting rod 2, equally can easy to assemble and dismantle, or, the bottom of this first centralizer 9 and the top flange connection of this connecting rod 2, equally can easy to assemble and dismantle.
In some embodiments, the first centralizer 9 comprises a first cylindrical portion and a first centralizing block, the top end of the first cylindrical portion is in threaded connection with the connecting member 1, the bottom end of the first cylindrical portion is in threaded connection with the connecting rod 2, and the first centralizing block is sleeved outside the first cylindrical portion.
In an exemplary embodiment, the first cylindrical portion is a solid cylinder, a male buckle (i.e., an external thread) is disposed on an outer wall of a top end of the first cylindrical portion, and a female buckle (i.e., an internal thread) is disposed on an outer wall of a bottom end of the first cylindrical portion, for example, the male buckle has a size of phi 22mm, the female buckle has a size of phi 22mm, and a first centering block made of nylon is sleeved on an outer side of the first cylindrical portion.
It should be noted that the first centralizer 9 is not a structure that the oil well wax-proof and scale-proof device must have, and the connecting member 1 may not be connected with the direct connecting rod 2 through the first centralizer 9 to simplify the composition structure of the oil well wax-proof and scale-proof device, or the connecting member 1 may be indirectly connected with the connecting rod 2 through the first centralizer 9 to guide the sucker rod and the oil well wax-proof and scale-proof device, so as to avoid unnecessary wear caused by mutual collision with other sleeved downhole tools.
(III) connecting rod 2
The connecting rod 2 is used for supporting each component of the oil well wax and scale prevention device, and the connecting rod 2 extends into the supporting sleeve 3.
That is, the connecting rod 2 can play a role of connecting in series, fixing and supporting each component of the oil well wax-proof and scale-proof device, wherein the connecting rod 2 is used for connecting in series, fixing and supporting each component comprising: support cover 3, first reed frame 4, two-way water conservancy diversion nozzle 6, second reed frame 7.
In some embodiments, if the oil well wax and scale control device is not equipped with the first centralizer 9, the top end of the connecting rod 2 is directly connected to the bottom end of the connecting member 1, and the connection method adopted by the two comprises the following steps: welding, threaded connection, rivet connection or flange joint, the connected mode of adopting between connecting rod 2 and connecting piece 1 is not specifically limited to this application embodiment.
In some embodiments, if the oil well wax and scale control device is provided with a first centralizer 9, the top end of the connecting rod 2 is connected with the bottom end of the first centralizer 9 by adopting a connection mode comprising: welding, threaded connection, rivet connection or flange joint, this application embodiment do not specifically prescribe a limit to the connected mode that adopts between connecting rod 2 and the first centralizer 9.
In some embodiments, if the oil well wax and scale control device is not equipped with the second centralizer 10, the bottom end of the connecting rod 2 is directly connected to another sucker rod, and the connection method adopted by the two comprises the following steps: welding, threaded connection, rivet connection or flange joint, the connected mode of adopting between connecting rod 2 and the sucker rod is not specifically limited to this application embodiment.
In some embodiments, if the oil well wax and scale control device is provided with a second centralizer 10, the bottom end of the connecting rod 2 is connected with the top end of the second centralizer 10 by the following connection methods: welding, threaded connection, riveted connection or flange joint, the embodiment of this application does not specifically limit the connection mode that adopts between connecting rod 2 and second centralizer 10.
In an exemplary embodiment, the connecting rod 2 is threaded with a first centralizer 9 and the connecting rod 2 is threaded with a second centralizer 10. Optionally, the connecting rod 2 is a solid cylinder, a male buckle (i.e. an external thread) is provided on the outer wall of the top end of the connecting rod 2, and a male buckle (i.e. an internal thread) is provided on the outer wall of the bottom end of the connecting rod 2, for example, the two male buckles are both phi 22mm in size, and the solid cylinder of the connecting rod 2 itself is phi 31mm in size.
(IV) support sleeve 3
The support sleeve 3 is used for fixing the first reed frame 4 on the connecting rod 2, and the size of the support sleeve 3 is matched with that of the connecting rod 2.
In some embodiments, the support sleeve 3 is sleeved outside the connecting rod 2, i.e. the connecting rod 2 extends into the support sleeve 3 and penetrates the support sleeve 3. In one example, the supporting sleeve 3 is a seamless circular tube which is sleeved outside the connecting rod 2 and plays a role in supporting and fixing the first reed cage 4, the wall thickness of the seamless circular tube is 3mm, and the outer diameter of the seamless circular tube is phi 38 mm.
(V) first reed frame 4 and first reed group 5
The first spring bracket 4 is used for fixing the first spring plate group 5 on the connecting rod 2, that is, the first spring bracket 4 is used for supporting and fixing the first spring plate group 5. Since the first reed frame 4 and the first reed group 5 are both located in the upper half part of the whole oil well wax and scale control device, the first reed frame 4 is also called as an "upper fixed reed frame", and the first reed group 5 is also called as an "upper group reed".
In some embodiments, the first spring frame 4 is sleeved outside the connecting rod 2, the first spring frame 4 includes a first tubular portion and a plurality of first rib frames, the plurality of first rib frames are connected to the first tubular portion and extend along a radial direction of the first tubular portion, and each first rib frame is provided with a first groove. The first tubular part is used for supporting and fixing the first brackets, and the first brackets are used for supporting and fixing the first reeds in the first reed group 5.
In some embodiments, the plurality of first tendons is evenly distributed along an axial direction of the first tubular portion. That is to say, have equal contained angle between the adjacent first muscle frame, can guarantee that the mixed liquid of all directions in the pit shaft receives acoustic treatment uniformly.
Optionally, the included angle between the adjacent first rib frames is 90 degrees, and at this time, the number of the first rib frames is exactly 4, and the 4 first rib frames are uniformly distributed along the axial direction of the first tubular part.
Optionally, the included angle between adjacent first rib frames is 60 degrees, and the number of the first rib frames is just 6, and the 6 first rib frames are uniformly distributed along the axial direction of the first tubular part.
In some embodiments, the first spring set 5 is configured to emit sound waves by vibration, and the first spring set 5 includes a plurality of first springs, and each first spring is fixedly connected to the first groove of a first rib. Optionally, the connection means between the first spring and the first groove includes but is not limited to: the first spring plate is connected with the first groove through a screw, a rivet, a clamping structure and the like, and the embodiment of the application does not specifically limit the connection mode between the first spring plate and the first groove.
Optionally, each first spring leaf is anchored to the first groove on one first rib by a plurality of rivets, so that the tightness of connection between the respective first spring leaf and the respective first groove can be improved.
In an exemplary embodiment, the first tubular part axially and uniformly distributes and radially extends 4 elongated first frames, the included angle between adjacent first frames is 90 degrees, a first strip-shaped groove is milled upwards in the central axis of each first frame, the first groove is used for installing a first spring, and a plurality of fixing holes are drilled transversely in the center of each first frame and are used for fixedly connecting with first springs in the first spring group 5.
Optionally, the type of the fixing hole is different according to different connection manners, for example, when the first spring plate is screwed with the first groove, the fixing hole is a female buckle (i.e. an internal thread), and for example, when the first spring plate is riveted with the first groove, the fixing hole is a through hole.
In an exemplary embodiment, the first spring set 5 includes 4 first springs, each of the 4 first springs is a long thin spring designed for generating sound waves, each of the first springs is mounted and fixed in a first groove formed on one of the first spring frames 4, and each of the first springs is fixedly connected with a plurality of fixing holes formed on the first spring frame through a plurality of fixing members. For example, two through holes are formed in each first frame, and each first spring plate is anchored with the two through holes in the first frame through two rivets.
(VI) bidirectional diversion nozzle 6
The two-way flow guiding nozzle 6 is used for guiding the mixed liquor to gather and pressurizing and accelerating the mixed liquor, and the two-way flow guiding nozzle 6 comprises a second tubular part and a plurality of flow guiding nozzles, and the flow guiding nozzles are connected with the second tubular part and extend along the radial direction of the second tubular part.
In some embodiments, the bidirectional fluid guiding nozzle 6 includes two sets of bidirectional fluid guiding nozzle rings, each set of bidirectional fluid guiding nozzle rings includes 4 fluid guiding nozzles uniformly distributed in the axial direction, and the two sets of bidirectional fluid guiding nozzle rings are staggered by 45 degrees in the vertical direction, the second tubular portion of the bidirectional fluid guiding nozzle 6 is also the ring portion of the two sets of bidirectional fluid guiding nozzles, and the second tubular portion is sleeved outside the connecting rod 2, that is, the connecting rod 2 extends into the second tubular portion and penetrates through the second tubular portion.
In the process, the two groups of bidirectional diversion nozzle ring bodies are staggered by 45 degrees, so that the mixed liquid in each direction in the shaft can be uniformly applied with force, pressurization and acceleration are carried out, the mixed liquid is forced to impact the first reed group 5 or the second reed group 8, each first reed or each second reed is triggered to emit sound waves, when the sound waves are transmitted in a medium, the cavitation action of the sound waves can change the surface activity of scale crystal grain states, long-chain paraffin hydrocarbon molecules and asphalt proton molecules in the crude oil mixed liquid can be broken through impact and high-speed microjet, and along with the reduction of molecular weight, the viscosity of the crude oil and the melting point of the wax can be reduced, so that the effects of preventing and preventing the scale and reducing the viscosity are effectively achieved.
(VII) second Reed Rack 7 and second Reed group 8
The second spring carrier 7 is used to fix the second spring plate group 8 on the connecting rod 2, that is, the second spring carrier 7 is used to support and fix the second spring plate group 8. Since the second reed frame 7 and the second reed group 8 are both located at the lower half part of the whole oil well wax and scale control device, the second reed frame 7 is also called as the lower fixed reed frame, and the second reed group 8 is also called as the lower group of reed.
In some embodiments, the second spring frame 7 is sleeved outside the connecting rod 2, the second spring frame 7 includes a third tubular portion and a plurality of second rib frames, the plurality of second rib frames are connected with the third tubular portion and extend along the radial direction of the third tubular portion, and each second rib frame is provided with a second groove. The third tubular portion is used for supporting and fixing the second brackets, and the second brackets are used for supporting and fixing the second reeds in the second reed group 8.
In some embodiments, the plurality of second bead frames are evenly distributed along the axial direction of the second tubular portion. That is to say, have equal contained angle between the adjacent second muscle frame, can guarantee that the mixed liquid of all directions in the pit shaft receives acoustic treatment uniformly.
Optionally, the included angle between the adjacent second rib frames is 90 degrees, and at this time, the number of the second rib frames is exactly 4, and the 4 second rib frames are uniformly distributed along the axial direction of the third tubular part.
Optionally, the included angle between the adjacent second rib frames is 60 degrees, and at this time, the number of the second rib frames is just 6, and the 6 second rib frames are uniformly distributed along the axial direction of the third tubular part.
In some embodiments, the second spring set 8 is configured to emit sound waves by vibration, and the second spring set 8 includes a plurality of second springs, and each second spring is fixedly connected to the second groove of a second rib. Optionally, the connection means between the second spring and the second groove includes, but is not limited to: the first spring plate is connected with the first groove through a screw, a rivet, a locking structure and the like, and the embodiment of the application does not specifically limit the connection mode between the second spring plate and the second groove.
Optionally, each second spring plate is anchored to the second groove on one second rib by a plurality of rivets, so that the tightness of connection between the respective second spring plate and the respective second groove can be improved.
In an exemplary embodiment, the third tubular part has 4 elongated second frames axially and uniformly distributed and radially extending, the included angle between adjacent second frames is 90 degrees, a second strip-shaped groove is milled upwards in the central axis of each second frame, the second groove is used for mounting a second spring, and a plurality of fixing holes are drilled transversely in the center of each second frame and are used for fixedly connecting with second springs in the second spring group 8.
Optionally, the type of the fixing hole varies according to different connection manners, for example, the fixing hole is a female buckle (i.e. an internal thread) when the second spring plate is screwed with the second groove, and the fixing hole is a through hole when the second spring plate is riveted with the second groove.
In an exemplary embodiment, the second spring set 8 includes 4 second springs, each of the 4 second springs is a long thin spring designed for generating sound waves, each of the second springs is mounted and fixed in a second groove formed on one of the second spring frames 7, and each of the second springs is fixedly connected with a plurality of fixing holes formed on the second spring frame through a plurality of fixing members. For example, each second frame is provided with two through holes, and each second spring is anchored with the two through holes of the second frame through two rivets.
(eighth) second centralizer 10
The second centralizer 10 is used for guiding the connecting rod 2, the top end of the second centralizer 10 is connected with the connecting rod 2, and the bottom end of the second centralizer 10 is connected with another sucker rod.
The second centralizer 10 is also called a "lower centralizer" because it is located at the lower half of the whole oil well wax and scale control device, and the second centralizer 10 is a guide designed for connecting the upper connecting rod 2 and the lower connecting rod, and is used to ensure that the oil pumping rod and the oil well wax and scale control device are located at the center of the shaft, and avoid unnecessary wear caused by mutual collision with other sleeved downhole tools.
In some embodiments, since the top end of the second centralizer 10 is connected with the bottom end of the connecting rod 2, the connection method adopted by the two comprises: welding, threaded connection, riveted connection or flange joint, the embodiment of this application does not specifically limit the connection mode that adopts between second centralizer 10 and connecting rod 2.
For example, the top of this second centralizer 10 and the bottom welding of this connecting rod 2 can guarantee fixed connection's compactness, perhaps, the top of this second centralizer 10 and the bottom threaded connection of this connecting rod 2, can easy to assemble and dismantle, perhaps, the top of this second centralizer 10 and the bottom riveted connection of this connecting rod 2, equally can easy to assemble and dismantle, perhaps, the top of this second centralizer 10 and the bottom flange connection of this connecting rod 2, equally can easy to assemble and dismantle.
In some embodiments, since the bottom end of the second centralizer 10 is connected to the top end of the sucker rod, the connection method adopted by the two comprises: welding, threaded connection, riveted connection or flange joint, this application embodiment does not specifically limit the connected mode that adopts between second centralizer 10 and the sucker rod.
For example, the bottom of this second centralizer 10 and the top welding of sucker rod can guarantee fixed connection's compactness, perhaps, the bottom of this second centralizer 10 and the top threaded connection of sucker rod, can easy to assemble and dismantle, perhaps, the bottom of this second centralizer 10 and the top riveted connection of sucker rod, equally can easy to assemble and dismantle, perhaps, the bottom of this second centralizer 10 and the top flange connection of sucker rod, equally can easy to assemble and dismantle.
In some embodiments, the second centralizer 10 comprises a second cylindrical portion and a second centralizing block, the top end of the second cylindrical portion is in threaded connection with the connecting rod 2, the bottom end of the second cylindrical portion is in threaded connection with the sucker rod, and the second centralizing block is sleeved outside the second cylindrical portion.
In an exemplary embodiment, the second cylindrical portion is a solid cylinder, a male buckle (i.e., an external thread) is disposed on an outer wall of a top end of the second cylindrical portion, and a female buckle (i.e., an internal thread) is disposed on an outer wall of a bottom end of the second cylindrical portion, for example, the male buckle has a size of phi 22mm, the female buckle has a size of phi 22mm, and a second centering block made of nylon is sleeved on an outer side of the second cylindrical portion.
It should be noted that the second centralizer 10 is not a structure that the oil well wax and scale prevention device must have, and the connecting rod 2 may not be connected to the sucker rod directly through the second centralizer 10, so as to simplify the structure of the oil well wax and scale prevention device, or the connecting rod 2 may be indirectly connected to the sucker rod through the second centralizer 10, so as to guide the sucker rod and the oil well wax and scale prevention device, and avoid unnecessary wear caused by mutual collision with other sleeved downhole tools.
The oil well wax-proof and scale-proof device related in the embodiment of the application can be also called as a 'sucker rod hydraulic sound generator', a plurality of stages (or a plurality of sections) of hydraulic sound generators are installed on a rod column of a sucker rod, the sucker rod can be moved up and down by a lifting pump, and meanwhile, the hydraulic sound generator is triggered to emit sound waves, crude oil mixed liquid in a shaft is continuously treated by the sound waves, so that formation produced liquid is prevented from scaling and waxing on the inner wall of the lifting pipe column, the viscosity of the crude oil mixed liquid can also be reduced, and the oil well wax-proof and scale-proof device has the effects of environmental protection, economy, low cost, convenience in construction, long effective period and the like.
In some embodiments, the oil well wax-proof and scale-proof device is suitable for all sucker rod type pump lifting wells, the effect is better on some small pump deep pumping lifting oil wells, the oil well wax-proof and scale-proof device is installed on the rod column of the sucker rod by changing the design of the oil well lifting pipe column and the rod column, the scaling and the wax formation of the inner wall of the lifting pipe column can be prevented on the basis of not increasing the energy consumption, the viscosity reduction effect is achieved, the production cost can be saved, the environment can be protected, and the oil well wax-proof and scale-proof device has wide application prospect and considerable economic benefit.
In an exemplary scenario, a 60mm pipe gauge is used for each oil pipe on the lifting pump, the pipe gauge cannot be used for descending the well, and the oil pipe is ready for descending a sucker rod after the lifting pipe column is descended. Before the rod column of the sucker rod is lowered, the oil well wax-proof and scale-proof device is assembled with the rod column of the sucker rod on the ground, and after the rod column is lowered completely, a Christmas tree at the well head is used for pressure test, and the oil well is handed over after the pressure test is qualified, and then pumping production is started. Alternatively, when the wax-proof and scale-proof device for the oil well is installed, the installation is started from the third sucker rod on the pump plunger, and every 20 oil-well wax-proof and scale-proof devices are installed from the beginning to the well head. Typically, 5 sets of oil well wax and scale control devices can be installed in a single well. As long as the sucker rod string moves up and down, the oil well wax-proof and scale-proof device can treat the mixed liquid in the pipe through sound waves, so that the purposes of preventing the formation mixed liquid from scaling and waxing in the lifting pipe string are achieved, the normal production of the oil well is ensured, and the production and maintenance cost is reduced.
When the pumping unit horsehead on the ground supports the sucker rod to move downwards, the oil well wax-proof and scale-proof device moves downwards along with the sucker rod. At the moment, the upper end nozzle of the bidirectional flow guide nozzle 6 of each oil well wax and scale prevention device in the well pressurizes and accelerates the mixed liquid in the pipe through the guide flow groove below the upper end nozzle, the mixed liquid is forced to be sprayed to the first reed set 5, each first reed in the first reed set 5 loses balance under the action of high-speed jet flow and begins to vibrate to emit sound waves, and the sound waves are transmitted in the annular liquid while treating the mixed liquid.
When the pumping unit horsehead on the ground supports the sucker rod to move upwards, the oil well wax-proof and scale-proof device moves upwards along with the sucker rod. At the moment, the lower end nozzles of the two-way flow guide nozzles 6 of each oil well wax-proof and scale-proof device on the sucker rod string pressurize and accelerate the mixed liquid in the pipe through the lower flow guide grooves, the mixed liquid is forced to be sprayed to the second vane group 8, each second vane in the second vane group 8 loses balance under the action of high-speed jet flow and begins to vibrate to emit sound waves, and the sound waves are transmitted in the annular liquid and treat the mixed liquid.
All the above optional technical solutions may be combined arbitrarily to form the optional embodiments of the present disclosure, and are not described herein again.
The oil well wax-proof and scale-proof device provided by the embodiment of the application is characterized in that the oil well wax-proof and scale-proof device is arranged between two sucker rods, the sucker rods are lowered into a shaft along with a lifting pump, the oil well wax-proof and scale-proof device is lowered into the shaft along with the lifting pump, so that mixed liquid in the shaft is pressurized and accelerated by each flow guide nozzle, the mixed liquid is forced to be sprayed to each first reed, each first reed loses balance and vibrates to emit sound waves under the action of high-speed jet flow, and similarly, when the sucker rods are pulled out of the shaft by the lifting pump, each flow guide nozzle forces the mixed liquid to be sprayed to each second reed, each second reed vibrates and emits sound waves, and the surface activity of scale crystal grains can be changed when the sound waves are transmitted in the mixed liquid, so that the conditions of scale formation and wax crystallization on the inner wall in the lifting process of the shaft can be effectively improved, and chemical agents are not relied, can meet the requirement of green production of oil fields.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. An oil well wax scale control apparatus, characterized in that the oil well wax scale control apparatus comprises: the device comprises a connecting piece (1), a connecting rod (2), a supporting sleeve (3), a first reed frame (4), a first reed group (5), a two-way flow guide nozzle (6), a second reed frame (7) and a second reed group (8);
the connecting piece (1) is used for connecting a sucker rod, the top end of the connecting piece (1) is connected with the sucker rod, and the bottom end of the connecting piece (1) is connected with the connecting rod (2);
the connecting rod (2) is used for supporting each component of the oil well wax and scale prevention device, and the connecting rod (2) extends into the supporting sleeve (3);
the support sleeve (3) is used for fixing the first reed frame (4) on the connecting rod (2), and the size of the support sleeve (3) is matched with that of the connecting rod (2);
the first reed frame (4) is used for fixing the first reed group (5) on the connecting rod (2), the first reed frame (4) is sleeved outside the connecting rod (2), the first reed frame (4) comprises a first tubular part and a plurality of first rib frames, the first rib frames are connected with the first tubular part and extend along the radial direction of the first tubular part, and each first rib frame is provided with a first groove;
the first reed group (5) is used for emitting sound waves by means of vibration, the first reed group (5) comprises a plurality of first reeds, and each first reed is fixedly connected with the first groove on one first rib frame;
the bidirectional diversion nozzle (6) is used for guiding mixed liquor to gather and pressurizing and accelerating the mixed liquor, and the bidirectional diversion nozzle (6) comprises a second tubular part and a plurality of diversion nozzles which are connected with the second tubular part and extend along the radial direction of the second tubular part;
the second reed frame (7) is used for fixing the second reed group (8) on the connecting rod (2), the second reed frame (7) is sleeved outside the connecting rod (2), the second reed frame (7) comprises a third tubular part and a plurality of second rib frames, the second rib frames are connected with the third tubular part and extend along the radial direction of the third tubular part, and each second rib frame is provided with a second groove;
the second reed group (8) is used for emitting sound waves by means of vibration, the second reed group (8) comprises a plurality of second reeds, and each second reed is fixedly connected with the second groove in one second rib frame.
2. An oil well wax scale control apparatus according to claim 1, further comprising a first centralizer (9);
the first centralizer (9) is used for guiding the connecting rod (2), the first centralizer (9) is located between the connecting piece (1) and the connecting rod (2), the top end of the first centralizer (9) is connected with the bottom end of the connecting piece (1), and the bottom end of the first centralizer (9) is connected with the top end of the connecting rod (2).
3. An oil well wax and scale control device according to claim 2, wherein the first centralizer (9) comprises a first cylindrical part and a first centralizing block, the top end of the first cylindrical part is in threaded connection with the connecting piece (1), the bottom end of the first cylindrical part is in threaded connection with the connecting rod (2), and the first centralizing block is sleeved outside the first cylindrical part.
4. An oil well wax scale control apparatus according to claim 1, further comprising a second centralizer (10);
the second centralizer (10) is used for guiding the connecting rod (2), the top end of the second centralizer (10) is connected with the connecting rod (2), and the bottom end of the second centralizer (10) is connected with the sucker rod.
5. The wax and scale control device for oil wells according to claim 4, wherein the second centralizer (10) comprises a second cylindrical portion and a second centralizing block, the top end of the second cylindrical portion is in threaded connection with the connecting rod (2), the bottom end of the second cylindrical portion is in threaded connection with the sucker rod, and the second centralizing block is sleeved outside the second cylindrical portion.
6. An oil well wax and scale control apparatus as claimed in claim 1, wherein the plurality of first tendons are evenly distributed along an axial direction of the first tubular portion.
7. An oil well wax and scale control apparatus as claimed in claim 6, wherein the included angle between adjacent first tendons is 90 °.
8. An oil well wax and scale control apparatus as claimed in claim 1, wherein said plurality of second tendons are evenly distributed along an axial direction of said second tubular portion.
9. An oil well wax and scale control apparatus as claimed in claim 8, wherein the angle between adjacent second tendons is 90 degrees.
10. An oil well wax and scale control apparatus as claimed in claim 1, wherein each first spring plate is anchored with said first groove on one first rib by a plurality of rivets; each second spring leaf is anchored with the second groove on one second rib by a plurality of rivets.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110006575.4A CN114718509B (en) | 2021-01-05 | 2021-01-05 | Wax-proof and scale-proof device for oil well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110006575.4A CN114718509B (en) | 2021-01-05 | 2021-01-05 | Wax-proof and scale-proof device for oil well |
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| CN114718509B CN114718509B (en) | 2023-11-28 |
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| CN116927725A (en) * | 2023-09-15 | 2023-10-24 | 新疆坤隆石油装备有限公司 | Underground special oil pump oil extraction system with scale prevention and wax control functions |
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| CN114718509B (en) | 2023-11-28 |
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