CN112412367A - Underground descaling device - Google Patents
Underground descaling device Download PDFInfo
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- CN112412367A CN112412367A CN201910769759.9A CN201910769759A CN112412367A CN 112412367 A CN112412367 A CN 112412367A CN 201910769759 A CN201910769759 A CN 201910769759A CN 112412367 A CN112412367 A CN 112412367A
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- 239000012530 fluid Substances 0.000 claims abstract description 51
- 238000005507 spraying Methods 0.000 claims abstract description 18
- 238000005096 rolling process Methods 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 238000005086 pumping Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims 1
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 239000003129 oil well Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0078—Nozzles used in boreholes
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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The application discloses scale removal device in pit belongs to petroleum machinery technical field. When using the downhole descaling device provided by the present application, the first end of the descaling body is connected with the oil pipe or the drill pipe, and at this time, the first end of the descaling body is equivalent to facing the wellhead. Because the pipe wall close to the first end on the descaling main body is provided with the first through holes, the descaling nozzle is arranged at each first through hole, and the spraying direction of each descaling nozzle faces the first end of the descaling main body, the high-pressure fluid sprayed out of the descaling nozzles faces the wellhead, so that the dirt cleaned by the high-pressure fluid sprayed out of the descaling nozzles can move towards the wellhead instead of being accumulated at the bottom of the well. In addition, a plurality of second through holes are formed in the pipe wall, close to the second end, of the descaling main body in the circumferential direction, a fan-shaped nozzle is installed at each second through hole, fluid sprayed out by the fan-shaped nozzles can form a water curtain, and therefore dirt cleaned by the descaling nozzles is further prevented from falling and accumulating at the bottom of the well.
Description
Technical Field
The application relates to the technical field of petroleum machinery, in particular to an underground descaling device.
Background
In the process of extracting oil through an oil well, a scaling phenomenon occurs in the oil well, namely, dirt is adhered to a shaft of the oil well, so that the surface of the shaft of the oil well is rough, the flow of the oil in the shaft is influenced, and the extraction efficiency of the oil is further influenced.
In the related art, the downhole descaling device includes a mounting body and a plurality of nozzles, the mounting body is of a tubular structure, and one end of the mounting body is a closed end. The pipe wall of the installation main body is provided with a plurality of through holes, the through holes correspond to the nozzles one to one, each nozzle is installed at the corresponding through hole on the outer wall of the installation main body, and the spraying direction of each nozzle faces the closed end. When the downhole descaling device is used, the downhole descaling device is connected with the rotating device and placed in the shaft. The rotating device is connected with an oil pipe or a drill rod, then high-pressure fluid is injected into the underground descaling device through the oil pipe or the drill rod and the rotating device, the high-pressure fluid is sprayed out of the plurality of nozzles, and the rotating device drives the underground descaling device to rotate, so that the dirt is stripped from a shaft by the high-pressure rotating fluid sprayed out of the underground descaling device.
When the downhole descaling device is used, scale peeled from the wellbore may be accumulated at the bottom of the well, and it is inconvenient to take the cleaned scale out of the well.
Content of application
The application provides a scale removal device in pit, when using the scale removal device in pit that this application provided, can be convenient for take out the dirt after the clearance from the oil well. The technical scheme is as follows:
a downhole descaling device, comprising: the descaling device comprises a descaling main body, a plurality of descaling nozzles and a plurality of fan-shaped nozzles, wherein the liquid outlet of each descaling nozzle is a round opening;
the descaling main body is of a tubular structure, a plurality of first through holes are formed in the pipe wall, close to the first end, of the descaling main body, a plurality of second through holes are formed in the pipe wall, close to the second end, of the descaling main body in the circumferential direction, and the first end of the descaling main body is used for being connected with an oil pipe or a drill rod;
the descaling nozzles are arranged at the corresponding first through holes on the outer wall of the descaling main body, and the spraying direction of each descaling nozzle faces to the first end of the descaling main body;
the second through holes correspond to the fan-shaped nozzles one to one, each fan-shaped nozzle is installed at the corresponding second through hole on the outer wall of the descaling main body, and the spraying direction of each fan-shaped nozzle faces to the first end of the descaling main body.
Optionally, the downhole descaling device further comprises a rotating body, a plurality of rotating nozzles, a connecting mandrel, a connecting end cover and a connecting sleeve;
the rotating main body, the connecting mandrel and the connecting sleeve are all of a tubular structure, the first end of the rotating main body is a closed end, the second end of the rotating main body is connected with the second end of the descaling main body, and the first end of the descaling main body is connected with the first end of the connecting mandrel;
a first circular boss is arranged on the outer wall between the first end of the connecting mandrel and the second end of the connecting mandrel, the first circular boss is positioned in the first end of the connecting sleeve, a through hole is formed in the connecting end cover, the connecting end cover penetrates through the connecting mandrel and is connected with the end face of the first end of the connecting sleeve, the outer diameter of the first circular boss is larger than the aperture of the through hole, and the second end of the connecting sleeve is used for connecting an oil pipe or a drill rod;
it has one pair or more to open along the circumferencial direction on the pipe wall of rotating body to have one pair or more to the third through-hole, the position that has two third through-holes that a pair of third through-hole includes in one pair or more to the third through-hole is relative, installs two rotary jet on the outer wall of two third through-holes that every pair of third through-hole includes respectively, and the injection direction of each rotary jet is located the coplanar, every rotary jet's injection direction with the contained angle between the radial of installing every rotary jet position department on the rotating body is the same, just the contained angle is not 0 degree.
Optionally, the downhole descaling device further comprises a connection sleeve;
the connecting head sleeve is of a tubular structure, the first end of the connecting head sleeve is connected with the first end of the descaling main body, and the second end of the connecting head sleeve is connected with the first end of the connecting mandrel.
Optionally, the downhole descaling device further comprises a connecting core rod;
the connecting core rod is of a tubular structure, the first end of the connecting core rod is connected with the second end of the rotating main body, and the second end of the connecting core rod is connected with the second end of the descaling main body.
Optionally, a second circular boss is disposed on an inner wall of the second end of the descaling body along the circumferential direction, and the second end of the connecting core rod is connected with the second circular boss.
Optionally, the connecting sleeve is of a tubular structure with a variable inner diameter, the inner diameter of the first end of the connecting sleeve is larger than the inner diameter of the second end of the connecting sleeve, the second end of the connecting mandrel is located in the second end of the connecting sleeve, and the difference between the outer diameter of the second end of the connecting mandrel and the inner diameter of the second end of the connecting sleeve is smaller than a numerical threshold.
Optionally, the downhole descaling device further comprises a first rolling bearing and a second rolling bearing;
the first rolling bearing is nested on the connecting mandrel and is positioned between the first circular boss and the second end of the connecting sleeve;
the second rolling bearing is nested on the connecting mandrel and is positioned between the first circular boss and the connecting end cover.
Optionally, the plurality of first through holes are spirally distributed on the pipe wall of the descaling main body close to the first end.
In another aspect, a downhole descaling system is provided, which comprises any one of the downhole descaling devices, a plurality of oil pipes and a pumping device;
the oil pipes are connected in sequence, the first oil pipe after being connected in sequence is connected with the first end of the descaling main body, the last oil pipe after being connected in sequence is connected with the pump injection device, and the pump injection device is used for pumping high-pressure fluid into the oil pipes.
In another aspect, a downhole descaling system is provided, which comprises any one of the downhole descaling devices, a plurality of drill pipes and a pumping device;
the multiple drill rods are connected in sequence, the first drill rod after being connected in sequence is connected with the first end of the descaling main body, the last drill rod after being connected in sequence is connected with the pump injection device, and the pump injection device is used for pumping high-pressure fluid into the multiple drill rods.
The beneficial effects that technical scheme that this application provided brought can include at least:
when the downhole descaling device provided by the application is used, the first end of the descaling body is connected with an oil pipe or a drill pipe, so that the first end of the descaling body is connected with the oil pipe or the drill pipe, and at the moment, the first end of the descaling body is equivalent to face a wellhead. Because the pipe wall close to the first end on the descaling main body is provided with the first through holes, the descaling nozzle is arranged at each first through hole on the outer wall of the descaling main body, and the spraying direction of each descaling nozzle faces the first end of the descaling main body, high-pressure fluid sprayed out of the descaling nozzles faces a wellhead, so that dirt cleaned by the high-pressure fluid sprayed out of the descaling nozzles can move towards the wellhead instead of being accumulated at the bottom of the well. In addition, a plurality of second through holes are formed in the pipe wall, close to the second end, of the descaling main body in the circumferential direction, fan-shaped nozzles are installed in each second through hole in the outer wall, close to the second end, of the descaling main body, the spraying direction of each fan-shaped nozzle faces the first end of the descaling main body, so that fluid sprayed by the fan-shaped nozzles can form a water curtain, and dirt cleaned by the descaling nozzles is further prevented from falling to the bottom of the well and being accumulated at the bottom of the well. That is, when the downhole descaling device provided by the application is used, the cleaned dirt on the shaft can be prevented from being accumulated at the bottom of the shaft, and the cleaned dirt can move to the ground along with the high-pressure fluid, so that the cleaned dirt can be conveniently taken out of an oil well.
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 cross-sectional view of a downhole descaling device according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a descaling body according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a rotating body according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a connecting mandrel according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a connecting sleeve provided in an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a connection end cap according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a connection head sleeve according to an embodiment of the present disclosure;
FIG. 8 is a schematic structural diagram of a connecting core rod according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a first rolling bearing provided in an embodiment of the present application;
FIG. 10 is a schematic structural diagram of another downhole descaling device provided by the embodiments of the present application;
FIG. 11 is a schematic structural view of a fan nozzle provided in an embodiment of the present application;
fig. 12 is a schematic structural diagram of a descaling nozzle according to an embodiment of the present disclosure.
Description of the drawings:
1: a descaling main body; 2: a descaling nozzle; 3: a fan-shaped nozzle; 4: a rotating body; 5: rotating the nozzle; 6: connecting the core shaft; 7: connecting an end cover; 8: connecting sleeves; 9: connecting a head sleeve; 10: connecting the core rod; 11: a first rolling bearing; 12: a second rolling bearing.
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 cross-sectional view of a downhole descaling device according to an embodiment of the present disclosure. As shown in fig. 1, the downhole descaling device comprises a descaling main body 1, a plurality of descaling nozzles 2 and a plurality of fan-shaped nozzles 3, wherein the liquid outlet of each descaling nozzle 2 is a round opening;
as shown in fig. 2, the descaling main body 1 is of a tubular structure, a plurality of first through holes are formed in the pipe wall of the descaling main body 1 close to the first end, a plurality of second through holes are formed in the pipe wall of the descaling main body 1 close to the second end along the circumferential direction, and the first end of the descaling main body 1 is used for being connected with an oil pipe or a drill rod.
The first through holes correspond to the descaling nozzles 2 one by one, each descaling nozzle 2 is arranged at the corresponding first through hole on the outer wall of the descaling main body 1, and the spraying direction of each descaling nozzle 2 faces to the first end of the descaling main body 1. The plurality of second through holes correspond to the plurality of fan-shaped nozzles 3 one by one, each fan-shaped nozzle 3 is arranged at the corresponding second through hole on the outer wall of the descaling main body 1, and the spraying direction of each fan-shaped nozzle 3 faces to the first end of the descaling main body 1.
When the downhole descaling device provided by the application is used, the first end of the descaling body is connected with an oil pipe or a drill pipe, so that the first end of the descaling body is connected with the oil pipe or the drill pipe, and at the moment, the first end of the descaling body is equivalent to face a wellhead. Because the pipe wall close to the first end on the descaling main body is provided with the first through holes, the descaling nozzle is arranged at each first through hole on the outer wall of the descaling main body, and the spraying direction of each descaling nozzle faces the first end of the descaling main body, high-pressure fluid sprayed out of the descaling nozzles faces a wellhead, so that dirt cleaned by the high-pressure fluid sprayed out of the descaling nozzles can move towards the wellhead instead of being accumulated at the bottom of the well. In addition, a plurality of second through holes are formed in the pipe wall, close to the second end, of the descaling main body in the circumferential direction, fan-shaped nozzles are installed in each second through hole in the outer wall, close to the second end, of the descaling main body, the spraying direction of each fan-shaped nozzle faces the first end of the descaling main body, so that fluid sprayed by the fan-shaped nozzles can form a water curtain, and dirt cleaned by the descaling nozzles is further prevented from falling to the bottom of the well and being accumulated at the bottom of the well. That is, when the downhole descaling device provided by the application is used, the cleaned dirt on the shaft can be prevented from being accumulated at the bottom of the shaft, and the cleaned dirt can move to the ground along with the high-pressure fluid, so that the cleaned dirt can be conveniently taken out of an oil well.
When the downhole descaling device provided by the embodiment of the application is used, the downhole descaling device provided by the embodiment of the application can rotate in a wellbore in order to avoid the additional use of a rotating device. In some embodiments, as shown in fig. 1, the downhole descaling device may further include a rotating body 4, a plurality of rotating nozzles 5, a connecting mandrel 6, a connecting end cap 7, and a connecting sleeve 8.
Fig. 3 is a schematic structural view of the rotating body, fig. 4 is a schematic structural view of the connecting mandrel, and fig. 5 is a schematic structural view of the connecting sleeve. As shown in fig. 3, 4 and 5, the rotating body 4, the connecting mandrel 6 and the connecting sleeve 8 are all of a tubular structure. The first end of the rotating body 4 is a closed end, the second end of the rotating body 4 is connected with the second end of the descaling body 1, and the first end of the descaling body 1 is connected with the first end of the connecting mandrel 6. As shown in fig. 4, a first circular boss is disposed on the outer wall between the first end of the connecting mandrel 6 and the second end of the connecting mandrel 6, and the first circular boss is located in the first end of the connecting sleeve 8. Fig. 6 is a schematic structural view of the connecting end cap. As shown in fig. 6, the connecting end cap 7 is provided with a through hole. The connecting end cover 7 penetrates through the connecting mandrel 6 and is connected with the end face of the first end of the connecting sleeve 8, the outer diameter of the first circular boss is larger than the aperture of the through hole, and the second end of the connecting sleeve 8 is used for being connected with an oil pipe or a drill rod.
As shown in fig. 3, one or more pairs of third through holes are formed in the pipe wall of the rotating body 4 along the circumferential direction, two third through holes included in one pair of third through holes are located in the one or more pairs of third through holes in opposite positions, two rotating nozzles 5 are respectively installed on the outer walls of the two third through holes included in each pair of third through holes, the spraying directions of the rotating nozzles 5 are located in the same plane, the included angle between the spraying direction of each rotating nozzle 5 and the radial direction of the position where each rotating nozzle 5 is installed on the rotating body 4 is the same, and the included angle is not 0 degree.
When the downhole descaling device comprises a rotating body 4, a plurality of rotating nozzles 5, a connecting mandrel 6, a connecting end cover 7 and a connecting sleeve 8, the second end of the rotating body 4 is connected with the second end of the descaling body 1, so that the rotating body 4 and the descaling body 1 are equivalently integrated. And, the first end of the descaling body 1 is connected with the first end of the connecting mandrel 6 so that the rotating body 4, the descaling body 1 and the connecting mandrel 6 are integrated. Since the plurality of rotary nozzles 5 are installed at the plurality of pairs of third through holes of the rotary body 4, and there are two third through holes included in a pair of third through holes among the one or more pairs of third through holes at opposite positions, the fluid ejected from the two opposite positions with respect to the third through holes can apply opposite shearing forces to the rotary body, so that the rotary body can be rotated. After the rotating body rotates, the rotating body drives the descaling body to rotate, and the descaling body drives the connecting mandrel to rotate. In addition, the outer diameter of the first circular boss on the connecting mandrel is larger than the aperture of the through hole on the connecting end cover, the first circular boss is positioned in the connecting sleeve, and the connecting end cover is connected with the end face of the first end of the connecting sleeve, so that the connecting mandrel can rotate in the connecting sleeve. That is, when using the scale removal device in pit that this application embodiment provided, need not extra rotary device and make the scale removal device in pit rotatory, the scale removal device in pit that this application embodiment provided can realize autogyration through high-pressure fluid.
In addition, in some embodiments, the connection manner of connecting the end cover and the end face of the first end of the connecting sleeve may be: the surface of the connecting end cover is provided with a plurality of through holes, the sleeve wall of the end surface of the first end of the connecting sleeve is provided with a plurality of threaded holes, and the plurality of through holes are in one-to-one correspondence with the plurality of spiral holes. A screw is inserted through a through hole and then inserted into the corresponding threaded hole, and in this way, the connecting end cap is connected to the end face of the first end of the connecting sleeve.
Of course, the connection manner of connecting the end cover and the end face of the first end of the connecting sleeve can also be other connection manners, such as welding and the like. The connection mode of the connection end cover and the end face of the first end of the connection sleeve is not limited in the embodiment of the application.
To facilitate connecting the descaling body with the connection mandrel, in some embodiments the downhole descaling device may further comprise a connection sleeve 9. As shown in fig. 8, the connecting sleeve 9 is of a tubular structure, a first end of the connecting sleeve 9 is connected with a first end of the descaling main body 1, and a second end of the connecting sleeve 9 is connected with a first end of the connecting mandrel 6.
To facilitate connecting the rotating body with the descaling body, in some embodiments the downhole descaling device may further comprise a connecting core rod 10. As shown in fig. 9, the connecting core rod 10 has a tubular structure. The first end of the connecting core rod 10 is connected with the second end of the rotating body 4, and the second end of the connecting core rod 10 is connected with the second end of the descaling body 1.
When using the scale removal device in pit that this application embodiment provided, from scale removal nozzle and fan-shaped nozzle blowout part high-pressure liquid, remaining high-pressure liquid still can keep great pressure for remaining high-pressure liquid can drive the rotating main part rotation after the rotating nozzle blowout, and then drives the scale removal main part rotation. In some embodiments, a second circular boss is disposed on the inner wall of the second end of the descaling body 1 along the circumferential direction, and the second end of the connecting core rod 10 is connected with the second circular boss.
After the inner wall of the second end of the descaling main body 1 is provided with the second circular boss along the circumferential direction, after the high-pressure fluid enters the descaling through the connecting sleeve, a part of the high-pressure fluid is sprayed out of the descaling nozzle and the fan-shaped nozzle, and the pressure of the un-sprayed high-pressure fluid, namely the pressure of the residual high-pressure fluid, is relatively low. Since the inner wall of the second end of the descaling main body 1 is provided with the second circular boss along the circumferential direction, the area of the channel for the residual high-pressure fluid to enter the rotating main body through the descaling nozzle is reduced, so that the pressure of the residual high-pressure fluid can be increased, and the residual high-pressure fluid can provide enough shearing force for the rotating main body after flowing out of the rotating nozzle, and the rotating main body can rotate.
In addition, to facilitate the connection of the connection sleeve with the oil pipe or the drill pipe, in some embodiments, as shown in fig. 7, the connection sleeve 8 may be a tubular structure with a varying inner diameter, the inner diameter of the first end of the connection sleeve 8 is larger than the inner diameter of the second end of the connection sleeve 8, the second end of the connection mandrel 6 is located in the second end of the connection sleeve 9, and the difference between the outer diameter of the second end of the connection mandrel 6 and the inner diameter of the second end of the connection sleeve 9 is smaller than a numerical threshold.
It should be noted that when the second end of the connecting mandrel and the first circular boss are located in the connecting sleeve, after the first end of the connecting sleeve is connected with the oil pipe or the drill pipe, the high-pressure fluid in the drill pipe or the oil pipe can be introduced into the connecting sleeve through the connecting sleeve. Since the second end of the connecting mandrel is located in the second end of the connecting sleeve and the difference between the outer diameter of the second end of the connecting mandrel 6 and the inner diameter of the second end of the connecting sleeve 9 is smaller than the numerical threshold, there is almost no gap between the second end of the connecting mandrel and the second end of the connecting sleeve. The high-pressure fluid in the oil pipe or the drill pipe can completely enter the connecting mandrel from the second end of the connecting sleeve and cannot enter a gap between the second end of the connecting sleeve and the second end of the connecting mandrel, so that the pressure of the high-pressure fluid is prevented from being reduced due to the fact that the high-pressure fluid enters the gap.
In addition, when using the scale removal device in pit that this application embodiment provided, rotatory nozzle blowout fluid so that rotatory main part rotates, and rotatory main part drives the main part rotation of descaling after rotatory, and the main part of descaling drives the connecting mandrel rotation after rotatory. Because the connecting mandrel is provided with the first circular boss, the connecting end cover is provided with the through hole, the connecting end cover penetrates through the connecting mandrel, and the outer diameter of the first circular boss is larger than that of the through hole, so that in the process that the connecting mandrel rotates in the connecting sleeve, the first circular boss possibly generates friction with the connecting sleeve and the connecting end cover to influence the rotation of the underground descaling main body. Thus, in some embodiments, the downhole descaling device may further comprise a first rolling bearing 11 and a second rolling bearing 12.
The first rolling bearing 11 is nested on the connecting mandrel 6 and is located between the first circular boss and the second end of the connecting sleeve 8. The second rolling bearing 12 is nested on the connecting mandrel 6 and is positioned between the first circular boss and the connecting end cover 7.
Fig. 9 is a schematic structural diagram of a first rolling bearing provided in an embodiment of the present application. When the underground descaling device comprises the first rolling bearing, the first rolling bearing can reduce friction between the first circular boss and the connecting sleeve. When the downhole descaling device comprises the second rolling bearing, the second rolling bearing can reduce friction between the first circular boss and the connecting end cover. So that the descaling body can be rotated better.
In addition, when the underground descaling device provided by the embodiment of the application is used, in order to enable the descaling device to rotate, high-pressure fluid sprayed by the descaling nozzles can form spiral high-pressure sprayed fluid, and dirt on a well bore can be cleaned better. In some embodiments, the plurality of first through holes in the descaling body may be helically distributed on the pipe wall of the descaling body 1 near the first end.
When a plurality of first through holes are spirally distributed on the pipe wall of the descaling main body close to the first end, because the descaling nozzle is installed at each first through hole, when the descaling main body is driven by the rotating main body to rotate, the descaling nozzles rotate along with the rotation of the descaling main body, and high-pressure fluid sprayed by the descaling nozzles forms spiral high-pressure jet fluid, so that dirt on a shaft can be cleaned more cleanly, and the dirt after being cleaned can be favorably moved to the ground.
In the embodiment of the present application, the second end of the rotating body 4 is connected to the second end of the descaling body 1, the first end of the descaling body 1 is connected to the first end of the connecting core shaft 6, the first end of the connecting head sleeve 9 is connected to the first end of the descaling body 1, the second end of the connecting head sleeve 9 is connected to the first end of the connecting core shaft 6, the first end of the connecting core rod 10 is connected to the second end of the rotating body 4, the second end of the connecting core rod 10 is connected to the second end of the descaling body 1, and the second end of the connecting core rod 10 is connected to the second boss, which may be connected by threads. Of course, other connection manners may also be adopted, and the embodiments of the present application are not limited herein.
In addition, when the downhole descaling device provided by the embodiment of the application is manufactured, the length of the descaling main body can be processed according to actual requirements. The length of the rotating body can be processed according to actual requirements.
FIG. 10 is a schematic structural diagram of another downhole descaling device provided by the embodiments of the present application. The following describes the use process of the downhole descaling device provided by the embodiment with reference to fig. 10:
when the underground descaling device provided by the embodiment of the application is used, the plurality of descaling nozzles are respectively arranged at the corresponding first through holes, and the spraying direction of each descaling nozzle faces to the first end of the descaling main body. And respectively installing a plurality of fan-shaped nozzles at the corresponding second through holes, and enabling the spraying direction of each fan-shaped nozzle to face the first end of the descaling main body. And then respectively nesting the first rolling bearing and the second rolling bearing on the connecting mandrel, placing the second end of the connecting mandrel and the first circular boss in the connecting sleeve, penetrating the connecting end cover through the first end of the connecting mandrel, and connecting the connecting end cover with the end face of the first end of the connecting sleeve. And then connecting the first end of the connecting mandrel with the second end of the connecting sleeve, and connecting the first end of the connecting sleeve with the first end of the descaling main body. And finally, respectively installing a plurality of rotary nozzles at the corresponding third through holes, and connecting the second end of the rotary main body with the second end of the descaling main body through a connecting core rod.
After high-pressure fluid is injected into the underground descaling device through an oil pipe or a drill rod, the high-pressure fluid firstly enters the descaling main body through the connecting mandrel, the plurality of descaling nozzles and the plurality of fan-shaped nozzles on the descaling main body can enable a part of the high-pressure fluid to continuously flow along the descaling main body, and the high-pressure fluid which is not sprayed out finally enters the rotating main body and is sprayed out through the plurality of rotating nozzles. When the plurality of rotary nozzles eject high-pressure fluid, the high-pressure fluid applies shear force to the rotary body, so that the rotary body rotates. After the rotating body rotates, the rotating body drives the descaling body to rotate, and the plurality of descaling nozzles on the descaling body can clean dirt on the shaft. As shown in fig. 11, the outlet of the fan nozzle is oval, so that the high pressure fluid from the nozzle in the fan nozzle forms a water curtain. As shown in fig. 12, the outlet of the descaling nozzle is round, so that the high-pressure fluid sprayed from the descaling nozzle has a large impact force to clean the dirt in the shaft. In addition, during the rotation of the descaling main body, the water curtain formed by each fan-shaped nozzle in the plurality of fan-shaped nozzles can form a water curtain of 360 degrees due to the rotation of the descaling main body, and dirt on a shaft cleaned by the descaling nozzles is prevented from falling to the bottom of the shaft. And after the plurality of descaling nozzles clean the dirt in the shaft, the cleaned dirt can move to the bottom surface along with the high-pressure fluid sprayed by the plurality of descaling nozzles, so that the cleaned dirt can be conveniently taken out of the shaft.
When the downhole descaling device provided by the application is used, the first end of the descaling body is connected with an oil pipe or a drill pipe, so that the first end of the descaling body is connected with the oil pipe or the drill pipe, and at the moment, the first end of the descaling body is equivalent to face a wellhead. Because the pipe wall close to the first end on the descaling main body is provided with the first through holes, the descaling nozzle is arranged at each first through hole on the outer wall of the descaling main body, and the spraying direction of each descaling nozzle faces the first end of the descaling main body, high-pressure fluid sprayed out of the descaling nozzles faces a wellhead, so that dirt cleaned by the high-pressure fluid sprayed out of the descaling nozzles can move towards the wellhead instead of being accumulated at the bottom of the well. In addition, a plurality of second through holes are formed in the pipe wall, close to the second end, of the descaling main body in the circumferential direction, fan-shaped nozzles are installed in each second through hole in the outer wall, close to the second end, of the descaling main body, the spraying direction of each fan-shaped nozzle faces the first end of the descaling main body, so that fluid sprayed by the fan-shaped nozzles can form a water curtain, and dirt cleaned by the descaling nozzles is further prevented from falling to the bottom of the well and being accumulated at the bottom of the well. That is, when the downhole descaling device provided by the application is used, the cleaned dirt on the shaft can be prevented from being accumulated at the bottom of the shaft, and the cleaned dirt can move to the ground along with the high-pressure fluid, so that the cleaned dirt can be conveniently taken out of an oil well.
The embodiment of the application provides a downhole descaling system, which comprises any one of the downhole descaling devices, a plurality of oil pipes and a pump injection device.
The oil pipes are connected in sequence, the first oil pipe after being connected in sequence is connected with the first end of the descaling main body, the last oil pipe after being connected in sequence is connected with the pump injection device, and the pump injection device is used for pumping high-pressure fluid into the oil pipes.
In some embodiments, the first oil pipe after being connected in sequence is connected with the first end of the descaling main body, and the last oil pipe after being connected in sequence is connected with the pumping device, and the connection manners of the connections may be threaded connections, and of course, other connection manners may also be used, which is not limited herein.
The embodiment of the application provides another underground descaling system which comprises any one of the underground descaling devices, a plurality of drill rods and a pump injection device.
The multiple drill rods are connected in sequence, the first drill rod after being connected in sequence is connected with the first end of the descaling main body, the last drill rod after being connected in sequence is connected with the pump injection device, and the pump injection device is used for pumping high-pressure fluid into the multiple drill rods.
In some embodiments, the first drill rod after being connected in sequence is connected with the first end of the descaling main body, and the last drill rod after being connected in sequence is connected with the pumping device, and the connection manners may be threaded connections, and of course, other connection manners may also be used, and the embodiments of the present application are not limited herein.
In summary, the present application is only a preferred embodiment and is not intended to be limited by the scope of the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The underground descaling device is characterized by comprising a descaling main body (1), a plurality of descaling nozzles (2) and a plurality of fan-shaped nozzles (3), wherein the liquid outlet of each descaling nozzle (2) is a round opening;
the descaling main body (1) is of a tubular structure, a plurality of first through holes are formed in the pipe wall, close to the first end, of the descaling main body (1), a plurality of second through holes are formed in the pipe wall, close to the second end, of the descaling main body (1) along the circumferential direction, and the first end of the descaling main body (1) is used for being connected with an oil pipe or a drill rod;
the first through holes correspond to the descaling nozzles (2) one by one, each descaling nozzle (2) is arranged at the corresponding first through hole on the outer wall of the descaling main body (1), and the spraying direction of each descaling nozzle (2) faces to the first end of the descaling main body (1);
the second through holes correspond to the fan-shaped nozzles (3) one by one, each fan-shaped nozzle (3) is installed at the corresponding second through hole on the outer wall of the descaling main body (1), and the spraying direction of each fan-shaped nozzle (3) faces to the first end of the descaling main body (1).
2. The downhole descaling device according to claim 1, further comprising a rotating body (4), a plurality of rotating nozzles (5), a connecting mandrel (6), a connecting end cap (7), a connecting sleeve (8);
the rotating main body (4), the connecting mandrel (6) and the connecting sleeve (8) are all of a tubular structure, the first end of the rotating main body (4) is a closed end, the second end of the rotating main body (4) is connected with the second end of the descaling main body (1), and the first end of the descaling main body (1) is connected with the first end of the connecting mandrel (6);
a first circular boss is arranged on the outer wall between the first end of the connecting mandrel (6) and the second end of the connecting mandrel (6), the first circular boss is positioned in the first end of the connecting sleeve (8), a through hole is formed in the connecting end cover (7), the connecting end cover (7) penetrates through the connecting mandrel (6) and is connected with the end face of the first end of the connecting sleeve (8), the outer diameter of the first circular boss is larger than the aperture of the through hole, and the second end of the connecting sleeve (8) is used for connecting an oil pipe or a drill rod;
it has one pair or more to the third through-hole to open along the circumferencial direction on the pipe wall of rotating body (4), it is relative to have the position of two third through-holes that a pair of third through-hole includes in one pair or more to the third through-hole, installs two rotary jet (5) respectively on the outer wall of two third through-holes that every pair of third through-hole includes, and the jet direction of each rotary jet (5) is located the coplanar, the jet direction of every rotary jet (5) with the contained angle between the radial of installing every rotary jet (5) position department on rotating body (4) is the same, just the contained angle is not 0 degree.
3. The downhole descaling device of claim 2, further comprising a coupling head (9);
the connecting head sleeve (9) is of a tubular structure, the first end of the connecting head sleeve (9) is connected with the first end of the descaling main body (1), and the second end of the connecting head sleeve (9) is connected with the first end of the connecting mandrel (6).
4. The downhole descaling device of claim 2, further comprising a connecting core rod (10);
the connecting core rod (10) is of a tubular structure, the first end of the connecting core rod (10) is connected with the second end of the rotating body (4), and the second end of the connecting core rod (10) is connected with the second end of the descaling body (1).
5. The downhole descaling device according to claim 4, wherein the inner wall of the second end of the descaling body (1) is provided with a second circular boss along the circumferential direction, and the second end of the connecting core rod (10) is connected with the second circular boss.
6. Downhole descaling device according to claim 2, wherein the connecting sleeve (8) is of a tubular construction with a varying inner diameter, the inner diameter of the first end of the connecting sleeve (8) is larger than the inner diameter of the second end of the connecting sleeve (8), the second end of the connecting mandrel (6) is located in the second end of the connecting sleeve (9), and the difference between the outer diameter of the second end of the connecting mandrel (6) and the inner diameter of the second end of the connecting sleeve (9) is smaller than a numerical threshold.
7. A downhole descaling device according to claim 2, further comprising a first rolling bearing (11) and a second rolling bearing (12);
the first rolling shaft (11) is nested on the connecting mandrel (6) and is positioned between the first circular boss and the second end of the connecting sleeve (8);
the second rolling bearing (12) is nested on the connecting mandrel (6) and is positioned between the first circular boss and the connecting end cover (7).
8. Downhole descaling device according to any of claims 1 to 7, wherein the first plurality of through holes are helically distributed in the wall of the descaling body (1) near the first end.
9. A downhole descaling system comprising the downhole descaling device of any one of claims 1 to 8, a plurality of oil pipes, a pump injection device;
the oil pipes are connected in sequence, the first oil pipe after being connected in sequence is connected with the first end of the descaling main body, the last oil pipe after being connected in sequence is connected with the pump injection device, and the pump injection device is used for pumping high-pressure fluid into the oil pipes.
10. A downhole descaling system comprising the downhole descaling device according to any one of claims 1 to 8, a plurality of drill pipes, a pump injection device;
the multiple drill rods are connected in sequence, the first drill rod after being connected in sequence is connected with the first end of the descaling main body, the last drill rod after being connected in sequence is connected with the pump injection device, and the pump injection device is used for pumping high-pressure fluid into the multiple drill rods.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910769759.9A CN112412367A (en) | 2019-08-20 | 2019-08-20 | Underground descaling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910769759.9A CN112412367A (en) | 2019-08-20 | 2019-08-20 | Underground descaling device |
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| CN112412367A true CN112412367A (en) | 2021-02-26 |
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| CN201910769759.9A Pending CN112412367A (en) | 2019-08-20 | 2019-08-20 | Underground descaling device |
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| WO1991011270A1 (en) * | 1990-01-19 | 1991-08-08 | B.H.R. Group Limited | Cleaning device |
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Application publication date: 20210226 |