A salt cavern gas storage well drilling slag removal device

Abstract

The present invention discloses a salt cavern gas storage drilling slag removal device, comprising: a centrifugal booster assembly, a separation guide cylinder and a slag removal box, the centrifugal booster assembly comprising an outer cylinder, an axial flow guide disc, and a guide cylinder and a driving guide cylinder fixedly mounted on the inner side of the outer cylinder, the outer periphery of the driving guide cylinder is provided with a plurality of support blades fixedly connected to the inner wall of the outer cylinder, a dual-output motor is fixedly mounted on the inner side of the driving guide cylinder, and the axial flow guide disc is fixedly mounted on the output end of the dual-output motor and located on the inner side of the guide cylinder, and the top end of the separation slag removal device is fixedly connected to the output end of the dual-output motor and rotatably mounted on the inner side of the separation guide cylinder. In the present invention, by setting a new swirl-type slag removal structure, the high-speed rotation of the axial flow guide disc is utilized to divert and centrifuge the drilling fluid of the mixed salt cuttings, and the acceleration booster and diversion work of the mixed drilling fluid is realized inside the axial flow guide disc to increase the movement rate of the mixed drilling fluid, ensure the subsequent separation effect and increase the circulation reflux rate of the drilling fluid.

Description

Technical Field

[0001] The invention relates to the technical field of drilling, in particular to a salt cavern gas storage drilling slag removal device. Background Art

[0002] Salt cavern gas storage is a facility that uses the dissolution cavity formed by underground salt layers to store natural gas or other gases. This gas storage method is widely used in natural gas peak regulation, strategic reserves and other fields due to its advantages such as large storage capacity, low cost and high safety. In the construction process of salt cavern gas storage, drilling and deslagging is an important link, which directly affects the formation of salt caverns and the construction quality of gas storage.

[0003] The drilling of salt cavern gas storage usually adopts the traditional rotary drilling technology. The salt layer is cut by rotating the drill bit, and the cut salt cuttings are taken out of the well through the drilling fluid. The drilling fluid plays the role of lubricating, cooling the drill bit and carrying cuttings during the drilling process. Commonly used drilling fluids include water-based drilling fluids, oil-based drilling fluids and composite drilling fluids. A large amount of salt cuttings (drill cuttings) generated during the drilling process are taken out of the wellbore by the drilling fluid, and solid-liquid separation is carried out on the ground through equipment such as vibrating screens and centrifuges to separate solid waste (salt cuttings) and drilling fluid. The existing solid-liquid separation type slag discharge structure has a low separation efficiency when dealing with drilling fluid with high concentration of salt cuttings, resulting in a large amount of salt cuttings cannot be effectively separated, affecting the use effect of the drilling fluid, and due to the use of multiple separation methods such as filtration, the drilling fluid reflux rate is slow, and it cannot quickly participate in slag discharge and drilling circulation. The amount of drilling fluid needs to be increased to ensure the stable operation of the drilling work, resulting in an increase in drilling costs.

[0004] In view of this, research and improvement are carried out on the existing problems, and a salt cavern gas storage drilling slag removal device is provided to solve the current problems. The purpose is to solve the problems and improve the practical value through this technology. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0006] To this end, the technical solution adopted by the present invention is: a salt cavern gas storage drilling slag removal device, comprising: a centrifugal booster assembly, a separation guide cylinder and a slag removal box, the centrifugal booster assembly comprising an outer cylinder, an axial flow guide disc, and a guide cylinder and a driving guide cylinder fixedly installed on the inner side of the outer cylinder, the outer periphery of the driving guide cylinder is provided with a plurality of supporting blades fixedly connected to the inner wall of the outer cylinder, a dual output motor is fixedly installed on the inner side of the driving guide cylinder, and the axial flow guide disc is fixedly installed on the output end of the dual output motor and is located on the inner side of the guide cylinder, the top end of the separation rotor is fixedly connected to the output end of the dual output motor and is rotatably installed on the inner side of the separation guide cylinder, the bottom end of the separation guide cylinder is provided with a drainage pipe, and the top end of the drainage pipe is provided with a core cylinder located on the inner side of the separation rotor, the surface of the separation guide cylinder is provided with a first slag removal groove and a second slag removal groove, the number of the slag removal boxes is two, both of which are fixed on the outer side of the separation guide cylinder and are respectively located on the outer periphery of the first slag removal groove and the second slag removal groove, and the slag removal box comprises a base and a slag guide box fixed to the surface of the base;

[0007] The separation rotor includes a main shaft, a separation barrel, and a first rotor and a second rotor fixed to the surface of the separation barrel. The separation barrel is fixedly installed on one end of the main shaft. The surface of the separation barrel is provided with a liquid inlet located between the first rotor and the second rotor. The bottom end of the separation barrel is provided with a liquid inlet opposite to and sleeved on the core barrel port. The second rotor is located between the first slag discharge groove and the second slag discharge groove.

[0008] In a preferred example, the present invention can be further configured as follows: the outer cylinder, the driving guide cylinder, the axial flow guide disk and the separation rotor are located on the same axis, and the supporting leaves are evenly distributed on the outer periphery of the driving guide cylinder in a circumferential direction.

[0009] In a preferred example, the present invention can be further configured as follows: the supporting blades are in the shape of inclined sheets and the inclination direction is the same as the swirl angle of the separation cylinder and the first impeller; the separation cylinder and the first impeller have the same structure and are both provided with a plurality of blades for liquid swirl on their surfaces.

[0010] In a preferred example, the present invention can be further configured as follows: the axial flow guide plate includes a centrifugal plate and a rotary blade shaft, the rotary blade shaft is fixedly installed on the top surface of the centrifugal plate, and the top surface of the centrifugal plate is provided with a liquid inlet which is sleeved on the outer periphery of the rotary blade shaft.

[0011] In a preferred example, the present invention can be further configured as follows: a plurality of centrifugal blades are provided on the inner side of the centrifugal disk and centrifugal openings are provided between adjacent centrifugal blades, and the blade shaft is in the shape of a spiral rod.

[0012] In a preferred example, the present invention can be further configured as follows: the first slag discharge groove and the second slag discharge groove are in the shape of annular grooves, and the inner side of the base and the slag guide box is provided with a retention groove connecting the first slag discharge groove and the second slag discharge groove, and the horizontal positions of the first slag discharge groove and the second slag discharge groove are respectively located at the upper and lower ends of the second rotating wheel.

[0013] In a preferred example, the present invention can be further configured as follows: a slag discharge port is provided at one end of the base and the slag guide box, and the slag discharge port is used to connect to a drilling slag retention component, and the retention component is one of a filtering component or a sedimentation tank.

[0014] In a preferred example, the present invention can be further configured as follows: a gap for liquid introduction is provided between the outer periphery of the core barrel and the inner wall of the liquid inlet, and a bearing seat for supporting the rotation of the separation drum is fixedly installed on the top of the core barrel.

[0015] The beneficial effects achieved by the present invention are:

[0016] 1. In the present invention, a novel swirl-type slag discharge structure is provided, and the high-speed rotation of the axial flow guide plate is utilized to divert and centrifuge the drilling fluid mixed with salt cuttings, so that the acceleration boost and diversion of the mixed drilling fluid are realized inside the axial flow guide plate to increase the movement rate of the mixed drilling fluid, ensure the subsequent separation effect and increase the circulation reflux rate of the drilling fluid.

[0017] 2. In the present invention, a multi-stage cyclone separation structure is provided, and the rotation of the first and second cyclones on the surface of the separation cylinder is utilized to further boost and accelerate the cyclone fluid, thereby producing a high-speed centrifugal effect, improving the slag removal effect, and allowing the purified drilling fluid to be discharged along the axis through the discharge pipe, thereby further ensuring the reflux flow rate and rate of the drilling fluid, performing efficient slag removal, and avoiding wear of the drilling equipment caused by fine particles in the reflux drilling fluid.

[0018] 3. In the present invention, a multi-stage separation effect is adopted, so that the slag with different particle diameters is discharged into each slag discharge box or retained in the separation guide tube, and the slag with different particle diameters is retained respectively to ensure the purity of the drilling fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the internal structure of a centrifugal booster assembly according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the exploded structure of a driving guide cylinder according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the internal structure of a separation guide cylinder according to an embodiment of the present invention;

[0024] Figure 6 For an embodiment of the present invention Figure 5 A schematic diagram of the structure at A;

[0025] Figure 7 A schematic diagram of a partial cross-sectional structure of a slag discharge box according to an embodiment of the present invention;

[0026] Figure 8 The figure is a schematic diagram of the separation rotor structure according to an embodiment of the present invention.

[0027] Reference numerals:

[0028] 100, centrifugal booster assembly; 110, outer cylinder; 120, guide cylinder; 130, drive guide cylinder; 140, axial flow guide disc; 131, support blade; 132, dual output motor; 141, centrifugal disc; 142, rotary blade shaft; 143, liquid inlet; 144, centrifugal outlet;

[0029] 200, separation guide cylinder; 210, liquid discharge pipe; 220, first slag discharge trough; 230, second slag discharge trough; 211, core cylinder;

[0030] 300, slag discharge box; 310, base; 320, slag guide box; 330, slag discharge port; 311, interception groove;

[0031] 400, separation drum; 410, main shaft; 420, separation drum; 430, first rotor; 440, second rotor; 421, liquid inlet; 422, separation liquid hole. DETAILED DESCRIPTION

[0032] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0033] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0034] A salt cavern gas storage drilling slag removal device provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0035] Combination Figure 1-7As shown, a salt cavern gas storage drilling deslagging device provided by the present invention comprises: a centrifugal booster assembly 100, a separation guide cylinder 200 and a deslagging box 300, wherein the centrifugal booster assembly 100 comprises an outer cylinder 110, an axial flow guide disc 140, and a guide cylinder 120 and a driving guide cylinder 130 fixedly mounted on the inner side of the outer cylinder 110, wherein the outer periphery of the driving guide cylinder 130 is provided with a plurality of supporting leaves 131 fixedly connected to the inner wall of the outer cylinder 110, a dual output motor 132 is fixedly mounted on the inner side of the driving guide cylinder 130, and the axial flow guide disc 140 is fixedly mounted on the output end of the dual output motor 132 and is located on the inner side of the guide cylinder 120, and the separation ... The top of the rotary drum 400 is fixedly connected to the output end of the dual output motor 132 and rotatably mounted on the inner side of the separation guide drum 200. The bottom of the separation guide drum 200 is provided with a drain pipe 210, and the top of the drain pipe 210 is provided with a core barrel 211 located on the inner side of the separation rotary drum 400. The surface of the separation guide drum 200 is provided with a first slag discharge groove 220 and a second slag discharge groove 230. There are two slag discharge boxes 300, both of which are fixed on the outer side of the separation guide drum 200 and are respectively located on the outer periphery of the first slag discharge groove 220 and the second slag discharge groove 230. The slag discharge box 300 includes a base 310 and a slag guide box 320 fixed to the surface of the base 310.

[0036] The separation drum 400 includes a main shaft rod 410, a separation drum 420, and a first rotor 430 and a second rotor 440 fixed on the surface of the separation drum 420. The separation drum 420 is fixedly installed on one end of the main shaft rod 410. A liquid inlet 421 located between the first rotor 430 and the second rotor 440 is provided on the surface of the separation drum 420. The bottom end of the separation drum 420 is provided with a liquid inlet 421 opposite to and sleeved on the port of the core drum 211. The second rotor 440 is located between the first slag discharge trough 220 and the second slag discharge trough 230.

[0037] In this embodiment, the outer cylinder 110 , the driving guide cylinder 130 , the axial flow guide plate 140 and the separation cyclone 400 are located on the same axis, and the support blades 131 are evenly distributed on the outer periphery of the driving guide cylinder 130 in the circumferential direction.

[0038] In this embodiment, the support blade 131 is in the shape of an inclined blade and its inclination direction is the same as the swirl angle of the separation cylinder 420 and the first rotor 430. The separation cylinder 420 and the first rotor 430 have the same structure and are both provided with a plurality of blades for liquid swirl on their surfaces.

[0039] Specifically, the driving guide cylinder 130 is supported and fixed by the support blades 131 on the surface of the driving guide cylinder 130 , and liquid diversion is achieved at the outer periphery of the driving guide cylinder 130 and the inner side of the outer cylinder body 110 .

[0040] In this embodiment, the axial flow guide plate 140 includes a centrifugal plate 141 and a rotary blade shaft 142 . The rotary blade shaft 142 is fixedly mounted on the top surface of the centrifugal plate 141 . The top surface of the centrifugal plate 141 is provided with a liquid inlet 143 which is sleeved on the outer periphery of the rotary blade shaft 142 .

[0041] In this embodiment, a plurality of centrifugal blades are disposed inside the centrifugal disk 141 , and centrifugal openings 144 are disposed between adjacent centrifugal blades. The blade shaft 142 is in the shape of a spiral rod.

[0042] Specifically, under the rotation of the rotary blade shaft 142, the salt cuttings are passed into the interior of the rotating centrifugal disk 141 and centrifugally discharged through the centrifugal outlet 144, giving the salt cuttings mixed drilling fluid a certain centrifugal effect.

[0043] In this embodiment, the first slag discharge groove 220 and the second slag discharge groove 230 are in the shape of annular grooves, and a retention groove 311 connecting the first slag discharge groove 220 and the second slag discharge groove 230 is opened on the inner side of the base 310 and the slag guide box 320, and the horizontal positions of the first slag discharge groove 220 and the second slag discharge groove 230 are respectively located at the upper and lower ends of the second rotating wheel 440.

[0044] Specifically, the first slag discharge chute 220 and the second slag discharge chute 230 are used to perform secondary cyclone discharge to separate the coarse particles and fine particles of the slag material.

[0045] In this embodiment, a slag discharge port 330 is provided at one end of the base 310 and the slag guide box 320. The slag discharge port 330 is used to connect to a drilling slag interception assembly, which is a filtering assembly or a sedimentation tank.

[0046] Specifically, the slag is discharged through the slag discharge port 330 and the interception component is connected to collect the slag and release the drilling fluid therein.

[0047] In this embodiment, a gap for introducing liquid is provided between the outer periphery of the core barrel 211 and the inner wall of the liquid inlet 421 , and a bearing seat for supporting the rotation of the separation rotor 400 is fixedly mounted on the top of the core barrel 211 .

[0048] Specifically, the core tube 211 extends to the interior of the separation tube 420 to guide the drilling fluid entering the separation tube 420 .

[0049] The working principle and use process of the present invention:

[0050] During the drilling work of the salt cavern gas storage, water-based drilling fluid, oil-based drilling fluid or composite drilling fluid and other liquids are injected to bring the cut salt cuttings out of the well through the drilling fluid, and the drilling fluid mixed with the salt cuttings is lifted to a high place and passed into the interior of the outer cylinder 110, and under the guidance of the guide cylinder 120 and the rotation of the rotary blade shaft 142, it is passed into the interior of the rotating centrifugal disk 141 and centrifugally discharged through the centrifugal outlet 144, and the salt cuttings mixed drilling fluid is given a certain centrifugal effect and swirls along the surface of the supporting blade 131 until it enters the interior of the separation guide cylinder 200, and is further subjected to high-speed swirl motion by the rotation of the separation rotary cylinder 400, so that the salt cuttings in the drilling fluid are separated from the liquid, and the salt cuttings are discharged at the first slag discharge groove 220 and the second slag discharge groove 230 and enter the slag discharge box 300 through the slag discharge. The filter component connected to the port 330 intercepts the salt cuttings into the slag box 300, and the drilling fluid overflowing from the ports of the first slag trough 220 and the second slag trough 230 is separated and directly returned to the drilling platform for recycling; the other part of the drilling fluid in the cyclone center area of ​​the separation vortex 400 is concentrated near the surface of the separation vortex 400 under the action of centrifugal cyclone and is introduced into the separation cylinder 420 through the separation liquid hole 422, and the drilling fluid at the bottom of the separation cylinder 420 enters the separation cylinder 420 through the liquid inlet 421, and is discharged together through the discharge pipe 210. The discharged drilling fluid is subjected to the centrifugal effect, so that there is almost no obvious solid impurities such as salt cuttings particles in it, and it can be directly returned to the drilling platform for recycling, providing high-speed and high-reflux drilling fluid circulation reflux, and improving the efficiency of drilling and slag discharge in salt cavern gas storage.

[0051] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A salt cavern gas storage well drilling and deslagging device, characterized in that: include: A centrifugal booster assembly (100), a separation guide cylinder (200) and a slag discharge box (300), wherein the centrifugal booster assembly (100) comprises an outer cylinder (110), an axial flow guide disc (140), a guide cylinder (120) and a driving guide cylinder (130) fixedly mounted on the inner side of the outer cylinder (110), the outer periphery of the driving guide cylinder (130) being provided with a plurality of support leaves (131) fixedly connected to the inner wall of the outer cylinder (110), a dual output motor (132) being fixedly mounted on the inner side of the driving guide cylinder (130), and the axial flow guide disc (140) being fixedly mounted on the output end of the dual output motor (132) and located on the inner side of the guide cylinder (120), and the top end of the separation rotary cylinder (400) being connected to the dual output motor The output end of the separation guide cylinder (132) is fixedly connected and rotatably mounted on the inner side of the separation guide cylinder (200); a liquid discharge pipe (210) is provided at the bottom end of the separation guide cylinder (200); and a core cylinder (211) located on the inner side of the separation rotary cylinder (400) is provided at the top end of the liquid discharge pipe (210); a first slag discharge groove (220) and a second slag discharge groove (230) are provided on the surface of the separation guide cylinder (200); two slag discharge boxes (300) are fixed on the outer side of the separation guide cylinder (200) and are respectively located on the outer periphery of the first slag discharge groove (220) and the second slag discharge groove (230); and the slag discharge box (300) comprises a base (310) and a slag guide box (320) fixed on the surface of the base (310); The separation drum (400) comprises a main shaft (410), a separation drum (420), and a first rotor (430) and a second rotor (440) fixed to the surface of the separation drum (420); the separation drum (420) is fixedly mounted on one end of the main shaft (410); a liquid inlet (421) located between the first rotor (430) and the second rotor (440) is provided on the surface of the separation drum (420); a liquid inlet (421) facing and sleeved on a port of a core drum (211) is provided at the bottom end of the separation drum (420); and the second rotor (440) is located between the first slag discharge groove (220) and the second slag discharge groove (230).

2. A salt cavern gas storage drilling and deslagging device according to claim 1, characterized in that: The outer cylinder (110), the driving guide cylinder (130), the axial flow guide plate (140) and the separation rotary cylinder (400) are located on the same axis, and the supporting leaves (131) are evenly distributed on the outer periphery of the driving guide cylinder (130) in a circumferential direction.

3. The salt cavern gas storage drilling and deslagging device according to claim 1, characterized in that: The supporting blade (131) is in the shape of an inclined blade and its inclination direction is the same as the swirl angle of the separation cylinder (420) and the first rotor (430). The separation cylinder (420) and the first rotor (430) have the same structure and are both provided with a plurality of blades for liquid swirl on their surfaces.

4. The salt cavern gas storage drilling and deslagging device according to claim 1, characterized in that: The axial flow guide disc (140) comprises a centrifugal disc (141) and a rotary blade shaft (142); the rotary blade shaft (142) is fixedly mounted on the top surface of the centrifugal disc (141); and the top surface of the centrifugal disc (141) is provided with a liquid inlet (143) sleeved on the outer periphery of the rotary blade shaft (142).

5. A salt cavern gas storage drilling and deslagging device according to claim 4, characterized in that: A plurality of centrifugal blades are arranged inside the centrifugal disk (141), and centrifugal openings (144) are arranged between adjacent centrifugal blades. The blade shaft (142) is in the shape of a spiral rod.

6. The salt cavern gas storage drilling and deslagging device according to claim 1, characterized in that: The first slag discharge groove (220) and the second slag discharge groove (230) are in the shape of annular grooves, and a retaining groove (311) communicating with the first slag discharge groove (220) and the second slag discharge groove (230) is provided on the inner side of the base (310) and the slag guide box (320), and the horizontal positions of the first slag discharge groove (220) and the second slag discharge groove (230) are respectively located at the upper and lower ends of the second rotary wheel (440).

7. The salt cavern gas storage drilling and deslagging device according to claim 1, characterized in that: A slag discharge port (330) is provided at one end of the base (310) and the slag guide box (320). The slag discharge port (330) is used to connect to a drilling slag interception component, and the interception component is a filtering component or a sedimentation tank.

8. The salt cavern gas storage drilling and deslagging device according to claim 1, characterized in that: A gap for introducing liquid is provided between the outer periphery of the core barrel (211) and the inner wall of the liquid inlet (421), and a bearing seat for supporting the rotation of the separation rotor (400) is fixedly mounted on the top of the core barrel (211).

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