CN210068084U - Cleaning device for underwater wellhead area - Google Patents
Cleaning device for underwater wellhead area Download PDFInfo
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- CN210068084U CN210068084U CN201920410478.XU CN201920410478U CN210068084U CN 210068084 U CN210068084 U CN 210068084U CN 201920410478 U CN201920410478 U CN 201920410478U CN 210068084 U CN210068084 U CN 210068084U
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Abstract
The utility model discloses a cleaning device for an underwater wellhead area, which comprises a mandrel with a central channel, a first shell which is rotatably sleeved on the mandrel relative to the mandrel, a second shell which is connected with the first shell, and a rotating component which is arranged in the second shell; the rotating assembly divides the inner space of the second shell into a first chamber and a second chamber which are communicated in the axial direction; the second shell is provided with nozzle assemblies which are distributed at multiple angles and are communicated with the second chamber; a central channel in the mandrel is communicated with the first cavity and the second cavity in sequence to form a fluid channel; when fluid passes through the rotating assembly along the fluid channel to the second cavity, the rotating assembly is driven to rotate, so that the second shell and the first shell are driven to rotate relative to the mandrel, and the fluid is sprayed outwards at multiple angles through the nozzle assembly. The utility model discloses a wellhead area cleaning device under water can with drilling rod lug connection, reduces the operating cost, provides high discharge capacity, multi-angle rotating and sprays the function, effectively clears up wellhead area detritus and grout under water.
Description
Technical Field
The utility model relates to a drilling engineering technical field especially relates to a wellhead area cleaning device under water.
Background
In the process of developing deepwater and sub-deepwater petroleum and natural gas resources by adopting an underwater production system, a cluster well head mode is generally adopted, and a single well operation procedure generally comprises the following steps: the surface layer is injected to run into a guide pipe or run into a well hole and then run into the guide pipe to perform well cementation, secondary drilling, casing running, well cementation, blowout preventer and riser running, lower opening operation and the like. Because the surface layer injection or drilling and the second-cut drilling operation have larger borehole sizes and are both before the circulation channel is established between the lower blowout preventer and the marine riser, a large amount of rock debris generated by the surface layer injection or drilling and the second-cut drilling operation and cement slurry returned in the well cementation process are generated. Under the influence of ocean currents on the seabed, rock debris and cement paste can be transported to a manifold area in the middle of a well, so that the landform of the area in the middle of a well site is changed, the flatness cannot meet the requirement of manifold installation, and cement around a well head is cemented, so that the installation of a jumper pipe is difficult.
The conventional device for cleaning rock debris and cement slurry in an underwater wellhead mainly comprises small-sized ROV carrying equipment and a large-sized drilling debris transfer system, but practice shows that: the small-sized ROV carrying equipment is relatively simple and convenient to operate and low in cost, but is limited by equipment power and small in discharge capacity, so that the cleaning time is long and the effect is difficult to effectively ensure; the large drilling cutting transfer system can transfer rock debris and cement slurry to a position far away from a well site through an underwater swabbing pump, the handling capacity is large, equipment is complex, the cost is high, the well mouth return condition cannot be monitored during well cementation, and the risk of underground well cementation operation is easily caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in providing a simple structure, can provide high discharge capacity, multi-angle rotating and spray the function, effectively clear up underwater well head and remove the underwater wellhead area cleaning device of detritus and grout.
The utility model provides a technical scheme that its technical problem adopted is: providing a cleaning device for an underwater wellhead area, which comprises a mandrel with a central channel, a first shell, a second shell and a rotating assembly, wherein the first shell is rotatably sleeved on the mandrel relative to the mandrel;
the rotating assembly divides the inner space of the second housing into a first chamber and a second chamber which are communicated in the axial direction; the second shell is provided with nozzle assemblies which are distributed at multiple angles and are communicated with the second chamber;
a central channel in the mandrel is communicated with the first cavity and the second cavity in sequence to form a fluid channel; when fluid passes through the rotating assembly along the fluid channel to the second chamber, the rotating assembly is driven to rotate, so that the second shell and the first shell are driven to rotate relative to the mandrel, and the fluid is sprayed outwards at multiple angles through the nozzle assembly.
Preferably, the rotating assembly comprises a bearing ring which is perpendicular to the central axis of the second casing and is installed in the second casing, and an impeller which is matched on the bearing ring, and the peripheral side surfaces of the bearing ring and the impeller are relatively fixed with the inner wall surface of the second casing.
Preferably, a single key for transmitting torque is embedded between an outer peripheral side surface of the impeller and an inner wall surface of the second casing.
Preferably, the bearing ring is provided with a central shaft matched with the central through hole of the impeller, and the central shaft penetrates through the central through hole of the impeller.
Preferably, the rotating assembly further comprises a conical pressing cap covering the central shaft of the bearing ring and abutting against the impeller.
Preferably, the impeller is a helically curved impeller.
Preferably, the nozzle assembly comprises a plurality of first nozzles and a plurality of second nozzles disposed on the axial side of the second housing and circumferentially spaced apart along the second housing, a plurality of third nozzle assemblies disposed on the closed end of the second housing; the first nozzle and the second nozzle are spaced apart in an axial direction of the second housing.
Preferably, the direction extensions of the first, second and third nozzles intersect with the central axis of the second housing at a point;
the axial direction of the first nozzle is vertical to the central axis of the second shell; an included angle of 15-30 degrees is formed between the axial direction of the second nozzle and the central axis of the second shell; an included angle of 30-70 degrees is formed between the axial direction of the third nozzle and the central axis of the second shell.
Preferably, the end face of the closed end of the second shell is a curved surface.
Preferably, a first end of the mandrel, which is far away from the second shell, extends out of the first shell, and an internal thread is arranged on the first end;
the mandrel extends out of the first housing toward the second end of the second housing into the first chamber of the second housing.
Preferably, the underwater wellhead area cleaning device further comprises a thrust bearing arranged between the mandrel and the first shell, a first dynamic sealing assembly and a second dynamic sealing assembly which are positioned on two opposite sides of the thrust bearing and arranged between the mandrel and the first shell;
the thrust bearing is relatively fixed with the mandrel, and the first shell is rotatable relative to the mandrel and the thrust bearing through the first dynamic seal assembly and the second dynamic seal assembly.
Preferably, the first dynamic seal assembly comprises a first static bearing sleeve which is sleeved and fixed on the mandrel, and a first dynamic bearing sleeve which is rotatably sleeved on the first static bearing sleeve; the first bearing fixed sleeve is abutted with one end, far away from the second shell, of the thrust bearing;
the second dynamic sealing assembly comprises a second bearing static sleeve which is sleeved and fixed on the mandrel and a first bearing dynamic sleeve which is rotatably sleeved on the second bearing static sleeve; the second bearing static sleeve is abutted with one end of the thrust bearing facing the second shell;
the first shell is sleeved on the first bearing movable sleeve and the second bearing movable sleeve.
Preferably, a first locking nut is arranged between the first bearing static sleeve and one end of the thrust bearing, and the first locking nut is in threaded connection with the first bearing static sleeve;
a spacer bush is arranged between the first bearing movable bush and one end of the thrust bearing, and the spacer bush is sleeved on the first lock nut; the axial length of the spacer bush is greater than that of the first locking nut.
Preferably, the mandrel is sleeved with a second locking nut, and the second locking nut is positioned on one side, far away from the thrust bearing, of the second bearing static sleeve and is in threaded connection with the mandrel.
The utility model has the advantages that: simple structure can with drilling rod lug connection, reduces the operating cost, and can provide high discharge capacity, multi-angle rotating and spray the function, can effectively clear up underwater wellhead area detritus and grout, and the installation of the middle manifold and the jumper pipe of economic guarantee underwater production system effectively.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic cross-sectional view of a cleaning device for an underwater wellhead area according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a support ring in the underwater wellhead area cleaning device according to an embodiment of the present invention;
fig. 3 is a schematic structural view of an impeller of the underwater wellhead area cleaning device according to an embodiment of the present invention;
fig. 4 is a schematic side view of a second housing of the underwater wellhead area cleaning device according to an embodiment of the present invention;
fig. 5 is a schematic end view of a second housing of the underwater wellhead area cleaning device according to an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses an underwater wellhead area cleaning device for clear up underwater wellhead rock debris and grout etc. it can include that dabber 1, relative dabber 1 rotatable cover establish on dabber 11 first shell 10, with the second shell 20 that first shell 10 meets and install the rotating assembly 30 in second shell 20.
Wherein the mandrel 1 has a central passage 100. The second housing 20 is joined to the first housing 10 such that an inner space communicating with the central passage 100 is formed therein. The rotating assembly 30 partitions an inner space of the second housing 20 into a first chamber 201 and a second chamber 20 communicating in an axial direction within the second housing 20. The second housing 20 is provided with a plurality of nozzle assemblies 40 which are distributed at a plurality of angles and communicated with the second chamber 202. The central channel 100 in the mandrel 10 is communicated with the first chamber 201 and the second chamber 202 in sequence to form a fluid channel; when the fluid passes through the rotating assembly 30 to the second chamber 202 along the fluid path, the kinetic energy of the fluid is utilized to drive the rotating assembly 30 to rotate, so as to drive the second housing 20 and the first housing 10 to rotate relative to the spindle, and the fluid is sprayed outwards at a plurality of angles through the nozzle assembly 40.
Specifically, the mandrel 1 has a cylindrical shape as a whole, and a central passage 100 extends through the entire mandrel 1 in the axial direction, and a fluid can flow from one end thereof into the central passage 100. The mandrel 1 comprises a first end and a second end opposite to each other, and the second housing 20 is connected with the first housing 10 at the side of the second end of the mandrel 1. The first end of the mandrel 1 extends out of the first housing 10 and may be provided with an internal thread 101 for connection to a drill rod through which the subsea wellhead area cleaning device may be fed into the subsea wellhead area for cleaning operations.
The second casing 10 is a casing with one closed end and one open end, the first casing 10 is sleeved on the periphery of the mandrel 1, and the second casing 20 is connected with the first casing 10 with the open end and closes the second end of the mandrel 1. The spindle 10, the first housing 10 and the second housing 20 are coaxial.
The first housing 10 and the second housing 20 can be connected by a screw thread, for example, the first housing 10 is provided with an external screw thread, and the second housing 20 is provided with an adapted internal screw thread. Preferably, the external threads on the first housing 10 extend along the axial direction of the first housing 10 and are inclined with respect to the central axis of the first housing 10, and the internal threads on the second housing 20 correspondingly extend obliquely.
The spindle 1 extends out of the first housing 10 towards the second end of the second housing 20 into the first chamber 201 of the second housing 20. The second end of the spindle 1 need not extend too far and may extend axially past the junction of the first housing 10 and the second housing 20.
The rotating assembly 30 may include a retainer ring 31 and an impeller 32. The retainer ring 31 is installed in the second housing 20 perpendicular to the central axis of the second housing 20, and the outer peripheral side surface thereof is fixed to the inner wall surface of the second housing 20. The impeller 31 is fitted to the support ring 31, and the outer peripheral side surface is fixed to the inner wall surface of the second casing 10.
As shown in fig. 2, the supporting ring 31 may be formed by connecting inner and outer rings with different diameters, and a central shaft 311 is disposed on the supporting ring and matches with the central through hole of the impeller 32, and the central shaft 311 is disposed through the central through hole of the impeller 32. The central shaft 311 is arranged to project on the inner ring of the carrier ring 31. The hollowed-out area between the inner and outer rings communicates with the first and second chambers 201, 202 and with the channels of the impeller 32.
As shown in fig. 3, the impeller 32 is a helical curved impeller. A single key 33 is fitted between the outer peripheral side surface of the impeller 32 and the inner wall surface of the second casing 20 to transmit torque. Corresponding to the single key 33, a key groove 311 is provided between the outer peripheral side surface of the impeller 32 and the inner wall surface of the second casing 20 to accommodate the single key 33.
As also shown in FIG. 1, the rotating assembly 30 further includes a tapered pressure cap 34 that fits over the central shaft 311 of the retainer ring 31 and abuts the impeller 32. The central axis 311 of the retainer ring 31 and the central axis of the tapered gland 34 are located on the central axis of the second housing 20 and also on the central axis of the mandrel 1. The tapered surface of the tapered pressure cap 34 faces the spindle 1, and when the fluid passes through the spindle 1 to the rotating assembly 30, the fluid is divided along the tapered surface of the tapered pressure cap 34 to the impeller 32, passes through the impeller 32 to the second chamber 202 of the second housing 20, and is ejected through the nozzle assembly 40.
In the present embodiment, as shown in fig. 1, 4 and 5, the nozzle assembly 40 includes a plurality of first nozzles 41, a plurality of second nozzles 42 and a plurality of third nozzles 43. A plurality of first nozzles 41 are provided on the axial side of the second casing 20 and are spaced apart in the circumferential direction of the second casing 20, a plurality of second nozzles 42 are also provided on the axial side of the second casing 20 and are spaced apart in the circumferential direction of the second casing 20, and the second nozzles 42 are arranged spaced apart from the first nozzles 41 in the axial direction of the second casing, the second nozzles 42 being on the side of the first nozzles 41 remote from the mandrel. A plurality of third nozzles 43 are provided on the closed end of the second housing 20 in circumferentially spaced apart relation.
Further, as shown in fig. 1, the extension lines of the directions of the first nozzle 41, the second nozzle 42, and the third nozzle 43 intersect at a point with the central axis of the second housing 10. The axial direction of the first nozzle 41 is perpendicular to the central axis of the second housing 20; the axial direction of the second nozzle 42 forms an included angle of 15-30 degrees with the central axis of the second shell 20; the axial direction of the third nozzle 43 forms an angle of 30 to 70 with the central axis of the second housing 20.
Alternatively, the closed end face of the second casing 20 may be a curved surface, and the third nozzle 43 is disposed on the closed end face, and the curved surface reduces the difficulty of processing the nozzle.
The nozzle assembly 40 meets the requirement of large-discharge-capacity multi-angle injection through the arrangement of a plurality of nozzles at different positions and orientations, improves the impact force of rock debris and cement slurry, can stir the rock debris and the cement slurry, and can push the rock debris and the cement slurry to the direction far away from the wellhead area.
Further, as shown in fig. 1, the device for cleaning an underwater wellhead area of the present invention further comprises a thrust bearing 50 disposed between the mandrel 1 and the first housing 10, and a first dynamic seal assembly 60 and a second dynamic seal assembly 70 disposed between the mandrel 1 and the first housing 10 and on opposite sides of the thrust bearing 50. The thrust bearing 50 is fixed relative to the mandrel 1 and is located axially between the first dynamic seal assembly 60 and the second dynamic seal assembly 70 on the mandrel 1. The first housing 10 is rotatable relative to the spindle 1 and the thrust bearing 50 by a first dynamic seal assembly 60 and a second dynamic seal assembly 70.
Wherein, the first dynamic seal assembly 60 is positioned on the side of the thrust bearing 50 away from the second housing 10, on the mandrel 1 near the first end of the mandrel 1; the second dynamic seal assembly 70 is located on the side of the thrust bearing 50 facing the second housing 10 and near the second end of the spindle 1.
First dynamic seal assembly 60 may include a first stationary bearing sleeve 61 and a first dynamic bearing sleeve 62. The first bearing static sleeve 61 is sleeved and fixed on the mandrel 1 and is also abutted with one end of the thrust bearing 50 far away from the second shell 20; the first bearing moving sleeve 62 is rotatably sleeved on the first bearing static sleeve 61 and is fixedly connected with the first housing 10. The first bearing moving sleeve 62 and the first housing 10 can be fixed relatively through threaded connection.
The second dynamic seal assembly 70 includes a second static bearing sleeve 71 and a second dynamic bearing sleeve 72. The second bearing fixed sleeve 71 is sleeved on the mandrel 1 and is also abutted with one end of the thrust bearing 50 facing the second shell 20; the second bearing moving sleeve 72 is rotatably sleeved on the second bearing static sleeve 71 and is fixedly connected with the first shell 10.
The first housing 10 is sleeved on the first bearing movable sleeve 62 and the second bearing movable sleeve 62, so that the first housing 10, the first bearing movable sleeve 62 and the second bearing movable sleeve 72 can rotate (rotate circumferentially) relative to the first bearing static sleeve 61, the second bearing static sleeve 71 and the mandrel 1.
A first lock nut 81 is arranged between the first bearing static sleeve 61 and one end of the thrust bearing 50, and the first lock nut 81 is in threaded connection with the first bearing static sleeve 61. A spacer 82 is arranged between the first bearing movable sleeve 62 and one end corresponding to the thrust bearing 50, and the spacer 82 is sleeved on the first lock nut 81; the spacer 82 has an axial length greater than that of the first lock nut 81 to keep the structure of the portion stable.
The mandrel 1 is sleeved with a second locking nut 83, and the second locking nut 3 is positioned on one side of the second bearing static sleeve 71, which is far away from the thrust bearing 50, and is in threaded connection with the mandrel 1. The second bearing retainer 71 is located between the spindle 1 and the second locking nut 83 and abuts against both.
The utility model discloses an underwater wellhead area cleaning device during operation, sea water get into dabber 1, flow into impeller 32 along fluid passage, drive second shell 20 and first shell 10 etc. synchronous revolution, and nozzle assembly 40 on the second shell 20 sprays out the sea water multi-angle, realizes that big discharge capacity multi-angle rotation sprays the purpose of clearance underwater wellhead area detritus and grout, improves detritus and grout cleaning efficiency.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (14)
1. A cleaning device for an underwater wellhead area is characterized by comprising a mandrel (1) with a central channel (100), a first shell (10) which is rotatably sleeved on the mandrel (1) relative to the mandrel (1), a second shell (20) connected with the first shell (10), and a rotating assembly (30) arranged in the second shell (20);
the rotating assembly (30) divides the inner space of the second housing (20) into a first chamber (201) and a second chamber (202) which are communicated in the axial direction; the second shell (20) is provided with nozzle assemblies (40) which are distributed at multiple angles and are communicated with the second chamber (202);
a central channel (100) in the mandrel (1) is communicated with the first chamber (201) and the second chamber (202) in sequence to form a fluid channel; when fluid passes through the rotating assembly (30) to the second chamber (202) along the fluid channel, the rotating assembly (30) is driven to rotate, so that the second shell (20) and the first shell (10) are driven to rotate relative to the mandrel (1), and the fluid is sprayed outwards at multiple angles through the nozzle assembly (40).
2. An underwater wellhead area cleaning device according to claim 1, characterized in that the rotating assembly (30) comprises a bearing ring (31) mounted in the second housing (20) perpendicular to the central axis of the second housing (20), an impeller (32) fitted on the bearing ring (31), the peripheral side surfaces of the bearing ring (31) and the impeller (32) being fixed relatively to the inner wall surface of the second housing (20).
3. An underwater wellhead zone cleaning device according to claim 2 characterised in that a single bond (33) for transmitting torque is embedded between the peripheral side face of the impeller (32) and the inner wall face of the second casing (20).
4. An underwater wellhead area cleaning device according to claim 2, characterized in that the bearing ring (31) is provided with a central shaft (311) matching with the central through hole of the impeller (32), and the central shaft (311) is arranged in the central through hole of the impeller (32).
5. Subsea wellhead area cleaning device according to claim 4, characterized by the fact that the rotating group (30) also comprises a conical pressure cap (34) that covers onto the central axis of the retainer ring (31) and abuts against the impeller (32).
6. A subsea wellhead area cleaning device according to claim 2, characterised in that the impeller (32) is a helically curved impeller.
7. A subsea wellhead area cleaning device according to claim 1, characterised in that the nozzle assembly (40) comprises a plurality of first nozzles (41) and a plurality of second nozzles (42) arranged on the axial side of the second casing (20) and circumferentially spaced along the second casing (20), a plurality of third nozzle (43) assemblies (40) arranged on the closed end of the second casing (20); the first nozzle (41) and the second nozzle (42) are spaced apart in an axial direction of the second housing (20).
8. Subsea wellhead area cleaning device according to claim 7, characterised in that the direction extensions of the first (41), second (42) and third (43) nozzles intersect the centre axis of the second housing (20) at a point;
the axial direction of the first nozzle (41) is perpendicular to the central axis of the second housing (20); the axial direction of the second nozzle (42) forms an included angle of 15-30 degrees with the central axis of the second shell (20); the axial direction of the third nozzle (43) forms an included angle of 30-70 degrees with the central axis of the second shell (20).
9. A subsea wellhead area cleanup device in accordance with claim 1, characterized in that the closed end face of the second casing (20) is curved.
10. A subsea wellhead area cleaning device according to claim 1, characterised in that the mandrel (1) projects from the first housing (10) at a first end remote from the second housing (20), which first end is provided with an internal thread (101);
the mandrel (1) extends axially out of the first housing (10) towards the second end of the second housing (20) into a first chamber (201) of the second housing (20).
11. An underwater wellhead zone cleaning device according to any of claims 1 to 10 and also comprising a thrust bearing (50) disposed between the mandrel (1) and the first housing (10), a first dynamic seal assembly (60) and a second dynamic seal assembly (70) on opposite sides of the thrust bearing (50) and disposed between the mandrel (1) and the first housing (10);
the thrust bearing (50) is fixed relative to the mandrel (1), and the first shell (10) can rotate relative to the mandrel (1) and the thrust bearing (50) through the first dynamic seal assembly (60) and the second dynamic seal assembly (70).
12. The subsea wellhead area cleaning device according to claim 11, characterized in that the first dynamic seal assembly (60) comprises a first static bearing sleeve (61) which is sleeved and fixed on the mandrel (1), and a first dynamic bearing sleeve (62) which is rotatably sleeved on the first static bearing sleeve (61); the first bearing static sleeve (61) is abutted with one end, away from the second shell (20), of the thrust bearing (50);
the second dynamic sealing assembly (70) comprises a second bearing static sleeve (71) which is sleeved and fixed on the mandrel (1) and a second bearing dynamic sleeve (72) which is rotatably sleeved on the second bearing static sleeve (71); the second bearing static sleeve (71) is abutted with one end of the thrust bearing (50) facing the second shell (20);
the first shell (10) is sleeved on the first bearing movable sleeve (62) and the second bearing movable sleeve (72).
13. The subsea wellhead area cleaning device according to claim 12, characterized in that a first locking nut (81) is arranged between the first bearing static sleeve (61) and one end of the thrust bearing (50), and the first locking nut (81) is in threaded connection with the first bearing static sleeve (61);
a spacer bush (82) is arranged between the first bearing movable bush (62) and one end of the thrust bearing (50), and the spacer bush (82) is sleeved on the first lock nut (81); the axial length of the spacer sleeve (82) is larger than that of the first locking nut (81).
14. An underwater wellhead area cleaning device according to claim 12, characterized in that a second locking nut (83) is sleeved on the mandrel (1), and the second locking nut (83) is positioned on one side of the second bearing static sleeve (71) far away from the thrust bearing (50) and is in threaded connection with the mandrel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920410478.XU CN210068084U (en) | 2019-03-28 | 2019-03-28 | Cleaning device for underwater wellhead area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920410478.XU CN210068084U (en) | 2019-03-28 | 2019-03-28 | Cleaning device for underwater wellhead area |
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| CN210068084U true CN210068084U (en) | 2020-02-14 |
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| CN201920410478.XU Active CN210068084U (en) | 2019-03-28 | 2019-03-28 | Cleaning device for underwater wellhead area |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944572A (en) * | 2019-03-28 | 2019-06-28 | 中国海洋石油集团有限公司 | Underwater well mouth region cleaning plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944572A (en) * | 2019-03-28 | 2019-06-28 | 中国海洋石油集团有限公司 | Underwater well mouth region cleaning plant |
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