CN114046138B - Device for discharging mud and rock debris on surface layer and use method - Google Patents
Device for discharging mud and rock debris on surface layer and use method Download PDFInfo
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- CN114046138B CN114046138B CN202111131791.8A CN202111131791A CN114046138B CN 114046138 B CN114046138 B CN 114046138B CN 202111131791 A CN202111131791 A CN 202111131791A CN 114046138 B CN114046138 B CN 114046138B
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- 239000002344 surface layer Substances 0.000 title claims abstract description 54
- 238000007599 discharging Methods 0.000 title claims abstract description 48
- 239000011435 rock Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007664 blowing Methods 0.000 claims abstract description 29
- 238000005553 drilling Methods 0.000 claims abstract description 26
- 241000191291 Abies alba Species 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000741 silica gel Substances 0.000 claims description 10
- 229910002027 silica gel Inorganic materials 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a device for discharging mud and rock debris on a surface layer and a use method thereof, wherein the device for discharging the mud and rock debris on the surface layer comprises: the device comprises a hollow pipe body, a bypass pipe vertically arranged on the periphery of the lower part of the hollow pipe body, a discharge hose axially connected with the bypass pipe, a gas blowing pipe joint arranged on the periphery of the bypass pipe, and an observation hole arranged at the top of the bypass pipe, wherein the side surface of the hollow pipe body is communicated with the inside of the bypass pipe, the bypass pipe is axially communicated with the inside of the discharge hose, and the side surface of the bypass pipe is communicated with the inside of the gas blowing pipe joint. According to the device for discharging mud and rock debris on the surface layer and the application method, when no lower deck exists below the christmas tree deck in drilling operation, a discharge channel for the mud and rock debris on the surface layer can be established in the surface layer drilling process, the operation is promoted to be normally carried out, the underground condition can be timely judged while the operation is being carried out, the operation risk is reduced, and the device is convenient and rapid to detach after the surface layer drilling operation is finished.
Description
Technical Field
The invention relates to the field of petroleum, natural gas and geological drilling engineering, in particular to a device for discharging mud and rock debris on a surface layer and a use method thereof.
Background
In the offshore oil drilling process, after the riser is lowered and cut on the christmas tree deck, the surface layer is drilled into a 16-in or 17.5-in borehole, the offshore earth slurry is used for drilling, mud and rock debris returned from the borehole are discharged at the wellhead while drilling, and meanwhile, the quantity of the returned mud and rock debris is monitored in a certain way, so that the underground condition can be judged. And after the surface drilling is finished, the surface mud and rock debris discharging device is required to be quickly disassembled so as to meet the requirement of quickly installing the casing head bottom flange.
The current device for discharging mud and rock debris on the surface layer of the ocean drilling well in the industry comprises a lower riser, cutting the riser on a christmas tree deck, cutting 2 return holes of about 3 inches at a certain position below the upper end surface of the riser in a manner of a scaffold, symmetrically arranged on two sides of a riser body, and installing a quick connector and a hose on the return holes for establishing a circulation channel for discharging mud and rock debris on the surface layer during surface layer drilling. Because there is no lower deck below the christmas tree deck of a part of offshore platform, the drilling of the riser body cannot be performed to establish a channel for discharging mud and rock debris from the surface layer, so that the drilling operation of the surface layer cannot be normally carried out, and a device for establishing a channel for discharging the mud and rock debris from the surface layer by the surface layer drilling is needed under the condition that there is no lower deck below the christmas tree deck.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a device for discharging mud and rock debris on a surface layer and a use method thereof.
The invention is realized by the following technical scheme:
the invention aims to provide a device for discharging mud and rock fragments on a surface layer and a use method thereof, which can establish a flow channel for discharging mud and rock fragments on the surface layer during the surface layer drilling of 16in or 17.5in a well hole after a riser is cut by the riser under the condition that a lower deck is not arranged below a christmas tree deck, can realize the purpose of discharging mud and rock fragments returned from a well hole while drilling, can realize monitoring while discharging, can judge the underground condition in time and reduce the operation risk.
In order to achieve the purpose, the invention provides a surface layer mud and rock debris discharging device and a using method thereof.
Preferably, the wall thickness of the hollow pipe body is 5-10 mm, and the inner diameter of the hollow pipe body is 10-15 mm larger than the outer diameter of the riser pipe.
Preferably, the length of the hollow pipe body is 1500-2500 mm.
Preferably, 2 symmetrical lifting lugs are arranged on the periphery of the top of the hollow pipe body, and the distance between the lifting lugs and the upper end face of the hollow pipe body is 200-400 mm.
Preferably, the wall thickness of the bypass pipe is 5-10 mm, and the outer diameter of the bypass pipe is 300-450 mm.
Preferably, the distance between the upper end face of the hollow pipe body and the upper end face of the bypass pipe is 750-1900 mm, and the distance between the lower end face of the hollow pipe body and the lower end face of the bypass pipe is 250-500 mm.
Preferably, one end of the air blowing pipe joint is connected with the bypass pipe, one end of the air blowing pipe joint is connected with the air blowing hose, and the axial included angle between the air blowing pipe joint and the discharge hose is 30-60 degrees.
Preferably, the inner diameter of the air blowing pipe joint is 8-15 mm, and the air blowing pipe joint is arranged at the upper part of the periphery of the bypass pipe.
Preferably, the gas blowing pipe joint is provided with a switching valve, and the switching valve is 10-30 mm away from the peripheral length of the bypass pipe.
Preferably, the discharge hose inner diameter is not smaller than the bypass pipe inner diameter.
Preferably, the discharge hose is flanged to the bypass line.
Preferably, the upper part of the observation hole is connected with an observation groove, and the height of the top of the observation groove from the top of the bypass pipe is 300-700 mm.
Preferably, the observation groove is at an angle of 90 ° to the bypass pipe.
The invention provides a device for discharging mud and rock debris on a surface layer, which comprises the following using method:
s1, cutting a riser pipe at a certain height above a christmas tree deck, and polishing a groove.
S2, covering the waterproof conduit with Zhou Tuma silica gel and wrapping canvas, and continuously coating the silica gel on the periphery of the canvas.
S3, installing the device, sleeving the hollow pipe body into the water-stop pipe, wherein the water-stop pipe is positioned inside the hollow pipe body, and the upper end surface of the water-stop pipe is lower than the lower end surface of the bypass pipe.
S4, filling the annular space of the outer periphery of the hollow pipe body and the inner periphery of the riser pipe with silica gel.
S5, uniformly welding a fixing frame on the periphery of the lower part of the hollow pipe body, and fixedly connecting the lower end of the fixing frame with the Christmas tree deck.
In some embodiments, the mount is provided with 4-8 mounts.
In some embodiments, the welding position of the fixing frame and the hollow pipe body is 10-40 mm above the lower end surface of the hollow pipe body.
S6, connecting the bypass pipe with the discharge hose through a flange, and fixedly connecting the other end of the discharge hose with the platform sea discharging pipeline.
The invention has the following beneficial effects: the invention innovatively designs a device for discharging mud and rock debris on the surface layer and a use method thereof, when no lower deck is arranged below a christmas tree deck, a discharge channel for the mud and rock debris on the surface layer can be established in the surface layer drilling process, the operation can be normally carried out, the underground condition can be timely judged while the operation is being carried out, the operation risk is reduced, and the device is convenient and rapid to detach after the surface layer drilling operation is finished. In addition, the invention has simple structure, convenient processing, low cost, quick and convenient site operation, repeated use and good application prospect, and can be widely applied to the surface layer drilling mud and rock debris discharging operation of the drilling site.
Drawings
FIG. 1 is a schematic diagram of a device for discharging mud cuttings in a middle layer according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the use of a surface layer mud cuttings discharging apparatus in an embodiment of the present invention;
fig. 3 is a cross-sectional view of the use of the surface layer mud cuttings discharging apparatus in an embodiment of the present invention.
Other relevant drawings may be made by those of ordinary skill in the art from the above figures without undue burden.
Detailed Description
In order to facilitate a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be given below with reference to fig. 1, 2 and 3.
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present invention.
It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present invention and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
As shown in figures 1-3, the surface layer mud and rock debris discharging device comprises a hollow pipe body 1, a bypass pipe 2 vertically arranged on the periphery of the lower part of the hollow pipe body 1, a discharging hose 3 axially connected with the bypass pipe 2, a gas blowing pipe joint 4 arranged on the periphery of the bypass pipe 2, and a viewing hole arranged at the top of the bypass pipe 2, wherein the side surface of the hollow pipe body 1 is communicated with the inside of the bypass pipe 2, the bypass pipe 2 is axially communicated with the inside of the discharging hose 3, and the side surface of the bypass pipe 2 is communicated with the inside of the gas blowing pipe joint 4.
Further, the wall thickness of the hollow pipe body 1 is 5-10 mm, if the wall thickness of the hollow pipe body 1 is too thin, the hollow pipe body 1 is easy to damage and break down, and if the wall thickness of the hollow pipe body 1 is too thick, the weight of the device is increased, and the device is not easy to operate. The inner diameter of the hollow pipe body 1 is 10-15 mm larger than the outer diameter of the riser 14, if the inner diameter of the hollow pipe body 1 exceeds the outer diameter of the riser 14 too much, the annular space 13 between the hollow pipe body 1 and the riser 14 is not easy to seal, and if the inner diameter of the hollow pipe body 1 exceeds the outer diameter of the riser 14 too little, the hollow pipe body 1 is difficult to be sleeved in the riser 14.
Further, the hollow tube body 1 has a length of 1500 to 2500mm.
Furthermore, 2 symmetrical lifting lugs 11 are arranged on the periphery of the top of the hollow pipe body 1, the distance between the lifting lugs 11 and the upper end face of the hollow pipe body 1 is 200-400 mm, and when the device is installed and removed, the device is hung on the lifting lugs 11 through a steel wire rope to hoist and transfer.
Further, the wall thickness of the bypass pipe 2 is 5-10 mm, the outer diameter of the bypass pipe 2 is 300-450 mm, in order to prevent the liquid returned from the well shaft from overflowing from the upper end surface of the hollow pipe body 1 due to insufficient discharge of the bypass pipe 2, if the inner diameter of the bypass pipe 2 is reduced, the length of the hollow pipe body 1 needs to be increased synchronously, and if the inner diameter of the bypass pipe 2 is increased, the length of the hollow pipe body 1 can be reduced appropriately.
Further, the distance between the upper end surface of the hollow pipe body 1 and the upper end surface of the bypass pipe 2 is 750-1900 mm, so that the returned liquid of the shaft has a certain buffer height, and the lower end surface of the hollow pipe body 1 is 250-500 mm away from the lower end surface of the bypass pipe 2, so that the hollow pipe body 1 can be sleeved outside the riser pipe 14 as much as possible, the tightness of the annular space between the hollow pipe body 1 and the riser pipe 14 is ensured, and the vibration of the device is prevented in the operation process.
Further, one end of the air blowing pipe joint 4 is connected with the bypass pipe 2, the other end of the air blowing pipe joint 4 is connected with the air blowing hose 42, the axial included angle between the air blowing pipe joint 4 and the discharge hose 3 is 30-60 degrees along the bypass pipe 2, and when the bypass pipe 2 and the discharge hose 3 are blocked due to excessive rock debris returned from a shaft, compressed air can be injected into the bypass pipe 2 and the discharge hose 3 through the air blowing pipe joint 4 and the air blowing hose 42 to clean the blocking objects.
Furthermore, the inner diameter of the air blowing pipe joint 4 is 8-15 mm, so that the impact force of passing compressed air is improved, and the pipe cleaning effect is improved.
Further, the air blowing pipe joint 4 is provided with a switching valve 41, the length of the switching valve 41 from the outer circumference of the bypass pipe 2 is 10-30 mm, the switching valve 41 is in a closed state in the normal operation process, and when the bypass pipe 2 or the discharge hose 3 is blocked, the switching valve 41 is opened, and compressed air is injected into the pipeline. Meanwhile, the blowing pipe joint 4 is provided at an upper portion of the outer circumference of the bypass pipe 2, preventing the fluid in the bypass pipe 2 from flowing out after the on-off valve 41 is opened.
Further, the inner diameter of the discharge hose 3 is not smaller than the inner diameter of the bypass pipe 2, so that the phenomenon that the liquid in the well bore returns to be discharged is prevented.
Further, the discharge hose 3 is connected to the bypass pipe 2 by the flange 21 and functions as a seal to prevent the discharge hose 3 from being disconnected from the bypass pipe 2.
Further, the upper part of the observation hole is connected with an observation groove 5, and the height of the top of the observation groove 5 from the top of the bypass pipe 2 is 300-700 mm. In some embodiments, the height of the observation tank 5 may be suitably raised if the wellbore return fluid is not discharged in the bypass pipe 2, resulting in the wellbore return fluid overflowing the top of the observation tank 5.
Further, the angle between the observation groove 5 and the bypass pipe 2 is 90 degrees.
In this embodiment, the method for using the device for discharging mud and rock debris from the surface layer is as follows:
s1, cutting the riser pipe 14 at a certain height above the Christmas tree deck 33, and polishing a groove on the upper end surface of the riser pipe 14.
S2, covering the canvas on the outer side Zhou Tuma of the riser 14 above the christmas tree deck 33, continuously smearing the silica gel on the periphery of the canvas, filling the annular space 13 of the riser 14 and the hollow pipe body 1 with the canvas, and sealing the annular space 13 of the riser 14 and the hollow pipe body 1 with the silica gel to prevent wellbore return fluid from seeping out from the annular space 13 of the riser 14 and the hollow pipe body 1.
S3, a steel wire rope or a hanging belt is used for buckling the lifting lug 11 of the device, the hollow pipe body 1 of the device is lifted to be above the upper end face of the riser pipe 14, the inner Zhou Taoru riser pipe 14 of the hollow pipe body 1 is arranged on the periphery of the riser pipe 14, the riser pipe 14 is positioned in the hollow pipe body 1, the upper end face of the riser pipe 14 is kept flush with the lower end face of the bypass pipe 2 or the upper end face of the riser pipe 14 is lower than the lower end face of the bypass pipe 2, and the reduction of the flow area of the bypass pipe 2 is prevented.
S4, filling the annular space between the outer periphery of the hollow pipe body 1 and the inner periphery of the riser pipe 14 with silica gel again to ensure tight sealing.
S5, uniformly welding a fixing frame 12 on the outer periphery of the lower part of the hollow pipe body 1, wherein the lower end of the fixing frame 12 is fixedly connected with a christmas tree deck 33, and 4-8 fixing frames 12 are used for fixing the device of the invention, so that the hollow pipe body 1 of the device of the invention slides downwards along the riser 14 after vibrating in the operation process, the leakage caused by the loose sealing of the annular space between the outer periphery of the hollow pipe body 1 and the inner periphery of the riser 14 is prevented, and meanwhile, the device of the invention rotates along with the rotation of a drilling tool in the operation process.
In some embodiments, the welding position of the fixing frame 12 and the hollow pipe body 1 is 10-40 mm above the lower end surface of the hollow pipe body 1.
S6, connecting the bypass pipe 2 with the discharge hose 3 through a flange 21, fixedly connecting the other end of the discharge hose 3 with a platform sea discharging pipeline, and establishing a sea discharging channel.
Compared with the prior art, the device for discharging mud and rock debris on the surface layer and the application method thereof are innovatively designed, when no lower deck exists below the christmas tree deck, a discharge channel for the mud and rock debris on the surface layer can be established in the surface layer drilling process, the operation can be normally carried out, the underground condition can be timely judged while the operation is being carried out, the operation risk is reduced, and the device is convenient and rapid to detach after the surface layer drilling operation is finished. In addition, the invention has simple structure, convenient processing, low cost, quick and convenient site operation, repeated use and good application prospect, and can be widely applied to the surface layer drilling mud and rock debris discharging operation of the drilling site.
It will be appreciated that the above technical features may be used in any combination without limitation.
The technical key point of the invention is that the device for discharging mud and rock debris on the surface layer and the using method thereof can establish a discharge channel of the mud and rock debris on the surface layer in the surface layer drilling process when no lower deck exists below the christmas tree deck. The examples and embodiments of the present invention are only preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that the scope of the present invention is not limited thereto, and any person skilled in the art can easily make modifications or variations within the technical scope of the present invention disclosed herein, and such modifications and variations are intended to be included in the present invention.
Claims (11)
1. The utility model provides a mud detritus device is discharged on top layer which characterized in that: the surface layer mud and rock debris discharging device comprises: the device comprises a hollow pipe body, a bypass pipe vertically arranged on the periphery of the lower part of the hollow pipe body, a discharge hose axially connected with the bypass pipe, a gas blowing pipe joint arranged on the periphery of the bypass pipe, and an observation hole arranged at the top of the bypass pipe, wherein the side surface of the hollow pipe body is communicated with the interior of the bypass pipe, the bypass pipe is axially communicated with the interior of the discharge hose, and the side surface of the bypass pipe is communicated with the interior of the gas blowing pipe joint;
keeping the upper end surface of the riser pipe flush with the lower end surface of the bypass pipe or enabling the upper end surface of the riser pipe to be lower than the lower end surface of the bypass pipe in the periphery of the inner Zhou Taoru riser pipe of the hollow pipe body;
and a fixing frame is uniformly welded on the periphery of the lower part of the hollow pipe body, and the lower end of the fixing frame is fixedly connected with the Christmas tree deck and is used for fixing the device for discharging mud and rock debris on the surface layer.
2. The surface layer mud and rock debris discharging device according to claim 1, wherein the wall thickness of the hollow pipe body is 5-10 mm, and the inner diameter of the hollow pipe body is 10-15 mm larger than the outer diameter of the riser pipe.
3. A surface layer mud and rock debris discharging device according to claim 1, wherein the length of the hollow pipe body is 1500-2500 mm.
4. The surface layer mud and rock debris discharging device according to claim 1, wherein 2 symmetrical lifting lugs are arranged on the periphery of the top of the hollow pipe body, and the distance between the lifting lugs and the upper end face of the hollow pipe body is 200-400 mm.
5. A surface layer mud and rock debris discharging device according to claim 1, wherein the wall thickness of the bypass pipe is 5-10 mm, and the outer diameter of the bypass pipe is 300-450 mm.
6. The surface layer mud and rock debris discharging device according to claim 1, wherein the distance between the upper end surface of the hollow pipe body and the upper end surface of the bypass pipe is 750-1900 mm, and the distance between the lower end surface of the hollow pipe body and the lower end surface of the bypass pipe is 250-500 mm.
7. A surface layer mud and rock debris discharging device according to claim 1, wherein one end of the air blowing pipe joint is connected with the bypass pipe, one end of the air blowing pipe joint is connected with the air blowing hose, and the axial included angle between the air blowing pipe joint and the discharging hose is 30-60 degrees.
8. The surface layer mud and rock debris discharging device according to claim 1, wherein the inner diameter of the air blowing pipe joint is 8-15 mm, and the air blowing pipe joint is arranged at the upper part of the periphery of the bypass pipe.
9. A surface layer mud and rock debris discharging device according to claim 1, wherein the gas blowing pipe joint is provided with a switching valve, and the switching valve is 10-30 mm away from the outer circumference of the bypass pipe.
10. The device for discharging mud and rock debris on the surface layer according to claim 1, wherein 4-8 fixing frames are arranged, and the welding positions of the fixing frames and the hollow pipe body are 10-40 mm above the lower end face of the hollow pipe body.
11. A method of using a surface layer mud cuttings discharging apparatus as set forth in any one of claims 1-10 wherein: the method comprises the following steps of:
step 1, cutting a riser pipe at a certain height above a christmas tree deck, and polishing a groove on the upper end surface of the riser pipe 14;
step 2, covering the outer Zhou Tuma silica gel of the riser above the christmas tree deck with canvas, continuously coating the periphery of the canvas with the silica gel, filling the annular space between the riser and the hollow pipe body with the canvas, and sealing the annular space between the riser and the hollow pipe body with the silica gel to prevent the wellbore return fluid from exuding from the annular space between the riser and the hollow pipe body;
step 3, the inner Zhou Taoru water-stop conduit of the hollow pipe body is arranged in the outer periphery of the water-stop conduit, so that the water-stop conduit is positioned in the hollow pipe body, the upper end face of the water-stop conduit is kept flush with the lower end face of the bypass pipe or the upper end face of the water-stop conduit is lower than the lower end face of the bypass pipe, and the reduction of the flow area of the bypass pipe is prevented;
step 4, filling the annular space around the hollow pipe body and the inner periphery of the riser pipe with silica gel again to ensure tight sealing;
step 5, uniformly welding a fixing frame on the outer periphery of the lower part of the hollow pipe body, wherein the lower end of the fixing frame is fixedly connected with a christmas tree deck and used for fixing a surface layer mud and rock debris discharging device, so that the hollow pipe body is prevented from sliding downwards along a riser after vibrating in the operation process, the annular space on the outer periphery of the hollow pipe body and the inner periphery of the riser is prevented from being sealed tightly to leak, and meanwhile, the surface layer mud and rock debris discharging device is prevented from rotating along with the rotation of a drilling tool in the operation process;
and 6, connecting the bypass pipe with the discharge hose through a flange, and fixedly connecting the other end of the discharge hose with a platform sea discharge pipeline to establish a sea discharge channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111131791.8A CN114046138B (en) | 2021-09-26 | 2021-09-26 | Device for discharging mud and rock debris on surface layer and use method |
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| CN202111131791.8A CN114046138B (en) | 2021-09-26 | 2021-09-26 | Device for discharging mud and rock debris on surface layer and use method |
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| CN114046138A CN114046138A (en) | 2022-02-15 |
| CN114046138B true CN114046138B (en) | 2023-09-29 |
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| CN208669297U (en) * | 2018-07-09 | 2019-03-29 | 中国石油集团渤海钻探工程有限公司 | A kind of slow pressure cutting sampling device of coal bed gas air drilling |
| CN210289671U (en) * | 2019-07-29 | 2020-04-10 | 中国石油集团川庆钻探工程有限公司 | Surface layer guide pipe drilling circulating chip removal system |
| KR20210038163A (en) * | 2019-09-30 | 2021-04-07 | 삼성중공업 주식회사 | Connecting apparatus for mud drainage of drillship |
| CN213116193U (en) * | 2020-08-31 | 2021-05-04 | 中国煤炭地质总局第二水文地质队 | Drainage device for large-diameter drilling construction |
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