While-drilling chipping removing device and construction method

Abstract

The invention provides a while-drilling chipping removing device and a construction method, and relates to the field of coal mining. Comprising a water filtering and slag storing pipe assembly and a central pipe assembly, a slag storing cavity is formed in the water filtering and slag storing pipe assembly, and a slag inlet is formed in the upper end of the water filtering and slag storing pipe assembly; the center pipe assembly penetrates through the slag storage cavity, and the lower end of the center pipe assembly penetrates through the bottom wall of the slag storage cavity and then is connected with the drill bit or the coring pipe. The flow guide part is arranged on the peripheral face of the water filtering and slag storing pipe assembly, and when the flow guide part rotates along with the water filtering and slag storing pipe assembly, flushing fluid and chippings at the well bottom are driven to flow upwards, so that the chippings can enter the slag storing cavity through the slag inlet. Under the condition that the normal test technical requirements are not changed, the cleanliness of the well bottom flushing fluid is improved through the while-drilling chipping removing device, interference of well bottom chippings and sediments on the actual measurement precision of the water guide crack zone is eliminated, the drilling efficiency, the safety and the test precision are improved, and the test cost is reduced. Therefore, rigorous coordination and unification of safe drilling and scientific research are realized.

Description

Technical Field

[0001] The invention relates to the field of coal mining, and in particular to a drilling debris removal device and a construction method. Background Art

[0002] In modern underground coal mines, when conducting research on the characteristics of overburden damage, the best way to accurately grasp the overburden damage height is to conduct actual measurement research on the overburden damage height, and the observation method of drilling flushing fluid loss in the water-conducting fracture zone is an important technical means for actual measurement of the overburden damage height. Therefore, after the mining of the coal mine working face, it is particularly important to use the observation method of drilling flushing fluid loss to determine the height of the overburden water-conducting fracture zone during the actual measurement of overburden damage. According to the existing relevant standards of the coal industry, clean water must be used as the flushing fluid for drilling in the bedrock observation section of the water-conducting fracture zone. This method calculates the consumption of flushing fluid by measuring parameters such as the original water volume in the water source box, the amount of water added during drilling, the remaining water volume in the water source box, the measurement time, the number of drilling footages, the hole depth, etc., and then analyzes the development height of the water-conducting fracture zone. It is a generally applicable observation method for determining the height of the water-conducting fracture zone in the coal industry. In the actual drilling observation process, the use of clean water drilling, especially when drilling unstable formations, often brings certain challenges to drilling safety. From the perspective of drilling construction safety, during the drilling process, it is usually necessary to add methyl salt or cellulose to increase the viscosity of the flushing fluid and improve the gelling properties of the flushing fluid to effectively remove debris in the wellbore and avoid bottom sediment at the bottom of the well, or even the risk of drilling burial. The observation of flushing fluid loss in the water-conducting fracture zone requires the use of clean water drilling to more accurately grasp the changes in flushing fluid consumption. In the actual drilling observation process, it is often difficult to find a technical means to meet the requirements of drilling safety or the technical requirements of leakage observation. At present, there are two main technical measures commonly used to address this contradictory problem: The first method is to increase the pumping volume to improve the flushing force of the drilling fluid. This method increases the pumping volume and then increases the flow rate of the flushing fluid to improve its carrying capacity for debris, thereby effectively flushing the sediments at the bottom of the well and the well wall and reducing the accumulation of solid particles at the bottom of the well. In actual operation, this method has a better effect on fine debris and mud powder in fine sandstone or mudstone. It is often ineffective for the debris produced by drilling in conglomerate or siltstone with high hardness and easy to break. Due to the influence of its own gravity, it cannot be suspended in the flushing fluid for a long time. Even if the flow rate of the flushing fluid is increased by increasing the pumping volume, it can only circulate up and down repeatedly in the middle and lower parts of the wellbore, and it is difficult to flush to the hole mouth. Although this method improves construction safety to a certain extent, the cleanliness of the flushing fluid is not solved. When drilling into slight mining fractures, it is very easy to fill and bridge them. The actual measurement accuracy of the water-conducting fracture zone cannot be guaranteed. As the drilling depth increases, the feasibility of this method becomes worse.

[0003] The second method to improve the characteristics of the flushing fluid is to add a small amount of cellulose and other high-molecular gel polymers to the flushing fluid. Cellulose is a common additive in drilling fluid. This method is to appropriately increase the viscosity of the drilling fluid by adding a small amount of compounds such as cellulose, change the rheological properties of the drilling fluid, and effectively improve the carrying capacity of the flushing fluid. This method solves the bottom sediment of the well, improves the cleanliness of the drilling flushing fluid, and enhances the safety of construction. However, even a small amount of cellulose and other high-molecular gel polymers will reduce the permeability of the flushing fluid, which is contrary to the requirement that the flushing fluid leakage observation technology must use clean water. At the top of the water-conducting fracture zone, the mining impact intensity is low, the fracture opening is small, and even shows crack characteristics. The fracture itself is not very water-conducting. This method of improving the viscosity of the flushing fluid has an adverse effect on the actual measurement of the development characteristics of the upper part of the water-conducting fracture zone. Therefore, in the existing water-conducting fracture zone flushing fluid leakage observation technology, there is no flushing fluid leakage observation and control technology that takes into account both construction safety and test accuracy. Summary of the invention

[0004] The present invention provides a debris removal device while drilling, which is used to solve the problem that the prior art water-conducting fracture zone flushing fluid loss observation technology cannot solve the problem of simultaneously taking into account construction safety and test accuracy.

[0005] The present invention provides a drilling debris removal device, comprising: A water filtering and slag storage pipe assembly, wherein the interior of the water filtering and slag storage pipe assembly has a slag storage cavity, and the upper end of the water filtering and slag storage pipe assembly is provided with a slag inlet; A central tube assembly, wherein the central tube assembly is inserted into the slag storage chamber, the lower end of the central tube assembly passes through the bottom wall of the slag storage chamber and is connected to a drill bit or a core pipe, and the upper end of the central tube assembly extends out from the slag inlet and is connected to an upper drill rod; The outer peripheral surface of the water filtering and slag storage pipe assembly is provided with a guide part, and the guide part is used to drive the flushing liquid and debris at the bottom of the well to flow upward when the water filtering and slag storage pipe assembly rotates, so that the debris can enter the slag storage chamber through the slag inlet.

[0006] According to a drilling debris removal device provided by the present invention, the water filtration and slag storage pipe assembly comprises: Bottom cover; A slag storage pipe, the lower end of which is connected to the bottom cover; A water filter pipe, the lower end of which is connected to the upper end of the slag storage pipe, a plurality of water filter holes are arranged on the outer peripheral surface of the upper end of the slag storage pipe, and the slag inlet is located on the upper end surface of the slag storage pipe.

[0007] According to a drilling debris removal device provided by the present invention, the drilling debris removal device further comprises: A crushing assembly, the crushing assembly includes a connecting sleeve and a cutting fan impeller, the connecting sleeve is arranged at the slag inlet, the cutting fan impeller is arranged inside the connecting sleeve and sleeved on the outer peripheral surface of the central tube assembly, and the cutting fan impeller is used to crush the debris entering through the slag inlet during rotation.

[0008] According to the drilling debris removal device provided by the present invention, the water filter pipe and the slag storage pipe are both coaxially arranged with the central pipe assembly.

[0009] According to a drilling debris removal device provided by the present invention, the connecting sleeve is threadedly connected to the slag inlet, the lower end of the water filter pipe is threadedly connected to the upper end of the slag storage pipe, and the lower end of the slag storage pipe is threadedly connected to the bottom cover.

[0010] According to a drilling debris removal device provided by the present invention, the central pipe assembly comprises: Two central tube bodies, the two central tube bodies are connected in sequence, the lower central tube body is located inside the slag storage pipe, the upper central tube body is located inside the water filter pipe, and the cutting fan impeller is sleeved on the outer periphery of the upper central tube body; An upper conical connector, the upper conical connector being connected to the upper end of the upper central pipe body and the upper drill rod; A lower conical coupling mechanism, the upper end of which passes through the bottom cover and is connected to the lower end of the central pipe body at the bottom, and the lower end of which is connected to a drill bit or a core pipe.

[0011] According to a drilling debris removal device provided by the present invention, the lower conical receiving mechanism comprises: A connecting shaft, the upper end of which passes through the bottom cover and is connected to the lower end of the central tube body at the bottom; A lower conical take-over body, the upper end of which is connected to the lower end of the connecting shaft, and the lower end of which is connected to a drill bit or a core tube.

[0012] According to a drilling debris removal device provided by the present invention, the guide portion is a spiral rib, and the spiral rib extends spirally along the axis of the water filtering and slag storage pipe assembly.

[0013] The present invention also provides a construction method of a drilling debris removal device, the construction method is based on any one of the drilling debris removal devices described above, and comprises: Connecting the lower end of the central tube assembly to the drill bit or the core tube, and connecting the upper end of the central tube assembly to the upper drill rod; Lowering the drilling debris removal device into the well along with the drilling tool; The drilling rig drives the drilling debris removal device to rotate through the drill pipe, and the rotating guide part drives the flushing fluid and debris at the bottom of the well to flow upward, so that the debris can enter the slag storage chamber through the slag inlet; After a round of drilling is completed, the drilling tool and the drilling debris removal device are lifted out of the well; Separating the drilling tool from the drilling-while-debris removal device, and taking out the debris stored in the drilling-while-debris removal device; Repeat the above steps in sequence to carry out the next round of drilling operations.

[0014] According to a construction method of a drilling debris removal device provided by the present invention, the step of removing debris stored in the drilling debris removal device comprises: Remove the upper cone receiver and crushing assembly; The debris in the slag storage chamber is taken out through the slag inlet.

[0015] The debris removal device while drilling provided by the present invention is provided with a guide part on the outer peripheral surface of the water filter and slag storage pipe assembly. When the guide part rotates with the water filter and slag storage pipe assembly, it drives the flushing fluid and debris at the bottom of the well to flow upward, so that the debris can enter the slag storage cavity through the slag inlet. Since the cleanliness of the flushing fluid at the bottom of the well is improved by the debris removal device while drilling without changing the normal test technical requirements, the interference of the debris sediment at the bottom of the well on the measured accuracy of the water-conducting fracture zone is eliminated, the drilling efficiency, safety and accuracy of the test are improved, thereby achieving the coordination and unification of safe drilling and high-precision requirements of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The present invention is a schematic diagram of the use principle of the drilling debris removal device provided by the present invention.

[0018] Figure 2 The diagram is a schematic diagram of the explosion structure of the drilling debris removal device provided by the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the drilling debris removal device provided by the present invention.

[0020] Reference numerals: 100. Water filter and slag storage pipe assembly; 110. Bottom cover; 120. Slag storage pipe; 130. Water filter pipe; 131. Water filter hole; 132. Diversion part; 140. Connecting sleeve; 150. Cutting fan impeller; 200. Center pipe assembly; 210. Center pipe body; 220. Upper conical coupling; 230. Connecting shaft; 240. Lower conical coupling body; 300. Drill bit; 400. Upper drill rod; 500. Drill rig. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0024] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0026] Combine the following Figure 1-Figure 3 The specific structure of the drilling debris removal device of the present invention is described.

[0027] like Figure 2 and Figure 3 As shown, the debris removal device while drilling includes a water filtering and slag storage pipe assembly 100 and a central pipe assembly 200. The water filtering and slag storage pipe assembly 100 has a slag storage cavity inside, and the upper end of the water filtering and slag storage pipe assembly 100 is provided with a slag inlet; the central pipe assembly 200 is penetrated in the slag storage cavity, and the lower end of the central pipe assembly 200 passes through the bottom wall of the slag storage cavity and is connected to the drill bit 300 or the core tube, and the upper end of the central pipe assembly 200 extends out of the slag inlet and is connected to the upper drill rod 400; the outer peripheral surface of the water filtering and slag storage pipe assembly 100 is provided with a guide part 132, and the guide part 132 is used to drive the flushing fluid and debris at the bottom of the well to flow upward when rotating with the water filtering and slag storage pipe assembly 100, so that the debris can enter the slag storage cavity through the slag inlet.

[0028] The debris removal device while drilling provided by the present invention is provided with a guide part 132 on the outer peripheral surface of the water filter and slag storage pipe assembly 100. When the guide part 132 rotates with the water filter and slag storage pipe assembly 100, it drives the flushing fluid and debris at the bottom of the well to flow upward, so that the debris can enter the slag storage cavity through the slag inlet. Since the cleanliness of the flushing fluid at the bottom of the well is improved by the debris removal device while drilling without changing the normal test technical requirements, the interference of the debris sediment at the bottom of the well on the measured accuracy of the water-conducting fracture zone is eliminated, the drilling efficiency, safety and accuracy of the test are improved, thereby achieving the coordination and unification of safe drilling and high-precision requirements of the test.

[0029] In one embodiment of the present invention, Figure 2 and Figure 3As shown, the water filter slag storage pipe assembly 100 includes a bottom cover 110, a slag storage pipe 120 and a water filter pipe 130. The bottom cover 110 is located at the lower part of the slag storage pipe 120. The bottom cover 110 cooperates with the slag storage pipe 120 and the water filter pipe 130 to form a slag storage cavity. The bottom cover 110 has two functions. On the one hand, it is used to connect the connecting shaft 230 with the slag storage pipe 120, which is convenient for disassembling the connecting shaft 230 and the slag storage pipe 120 for matching use; on the other hand, it is used to block the lower port of the slag storage pipe 120. When mud powder with strong adhesion is stored in the slag storage pipe 120 and the slag is unloaded in a normal manner, the bottom cover 110 can be removed for cleaning. The lower end of the slag storage pipe 120 is connected to the bottom cover 110. Preferably, the lower end of the slag storage pipe 120 is detachably connected to the bottom cover 110. Specifically, the lower end of the slag storage pipe 120 is threadedly connected to the bottom cover 110. For example, the outer peripheral surface of the lower end of the slag storage pipe 120 is provided with an external thread, and the inner wall of the bottom cover 110 is provided with an internal thread. The internal thread and the external thread cooperate to connect the lower end of the slag storage pipe 120 with the bottom cover 110.

[0030] The water filter pipe 130 is located above the slag storage pipe 120. The slag storage pipe 120 and the water filter pipe 130 are both made of stainless steel. Of course, other metal materials can also be used. The water filter pipe 130 and the slag storage pipe 120 are both coaxially arranged with the central pipe assembly 200. The length of the water filter pipe 130 is the same as the length of the slag storage pipe 120. Of course, the length of the water filter pipe 130 and the length of the slag storage pipe 120 can also be different, which is determined according to actual needs. The outer diameter of the water filter pipe 130 can be the same as or different from the outer diameter of the slag storage pipe 120. In this embodiment, the outer diameter of the water filter pipe 130 is the same as the outer diameter of the slag storage pipe 120. The lower end of the water filter pipe 130 is connected to the upper end of the slag storage pipe 120. Preferably, the lower end of the water filter pipe 130 is detachably connected to the upper end of the slag storage pipe 120, so as to facilitate the adjustment of the length of the water filter and slag storage pipe assembly 100 as needed. For example, when the drilling footage to be drilled is short, only the water filter pipe 130 can be used. At this time, the bottom cover 110 needs to be directly connected to the lower end of the water filter pipe 130. In order to facilitate the connection of the bottom cover 110 with the lower end of the water filter pipe 130, the lower end of the water filter pipe 130 can also be provided with an external thread so that the bottom cover 110 is connected to the lower end of the water filter pipe 130. For another example, when the drilling footage to be drilled is long, the water filter pipe 130 and the slag storage pipe 120 can be used at the same time. At this time, the bottom cover 110 is connected to the lower end of the slag storage pipe 120.

[0031] The lower end of the water filter pipe 130 is threadedly connected to the upper end of the slag storage pipe 120. For example, the inner wall of the lower end of the water filter pipe 130 is provided with an internal thread, and the outer peripheral surface of the upper end of the slag storage pipe 120 is provided with an external thread. The internal thread and the external thread cooperate to connect the lower end of the water filter pipe 130 with the upper end of the slag storage pipe 120 together.

[0032] The slag inlet is located at the upper end surface of the slag storage tube 120. The outer peripheral surface of the upper end of the slag storage tube 120 is provided with a plurality of water filter holes 131. The plurality of water filter holes 131 are arranged at intervals. The distance between two adjacent water filter holes 131 can be the same or different, and is determined according to actual needs. After the flushing liquid and debris enter the slag storage chamber through the slag inlet, the debris moves downward under the action of gravity and continuously accumulates at the bottom of the slag storage tube 120, continuously filling the slag storage tube 120. Since the space in the slag storage chamber is continuously occupied by debris, the flushing liquid can only flow upward. When the flushing liquid rises to the slag inlet, the overflow of the slag inlet and the vortex generated by the cutting impeller 150 form a counteracting force, which prevents the flushing liquid and debris from entering the slag storage chamber through the slag inlet, affecting the slag cleaning effect of the drilling debris removal device. By arranging a plurality of water filter holes 131 on the outer peripheral surface of the upper end of the slag storage tube 120, the flushing liquid flowing upward in the slag storage chamber can be discharged through the water filter holes 131, and will not form an impact force with the eddy current generated by the cutting impeller 150, ensuring that external debris can enter the slag storage chamber through the slag inlet.

[0033] In one embodiment of the present invention, Figure 2 and Figure 3 As shown, the drilling debris removal device also includes a crushing assembly, which includes a connecting sleeve 140 and a cutting fan impeller 150. The connecting sleeve 140 is arranged at the slag inlet, and the material of the connecting sleeve 140 is the same as that of the water filter pipe 130. The outer diameter of the connecting sleeve 140 is the same as that of the water filter pipe 130. Preferably, the connecting sleeve 140 is threadedly connected to the slag inlet. Of course, the connection method of the connecting sleeve 140 and the slag inlet is not limited to this, and other connection methods can also be used for connection.

[0034] The cutting impeller 150 is arranged inside the connecting sleeve 140 and sleeved on the outer peripheral surface of the central tube assembly 200. The cutting impeller 150 is coaxially arranged with the central tube assembly 200. The cutting impeller 150 is used to crush large pieces or hard fragments entering through the slag inlet during rotation. The cutting impeller 150 is made of tungsten steel to ensure a good crushing effect on the fragments. Preferably, the cutting impeller 150 is a high-angle cutting impeller to further enhance the crushing effect on the fragments. The cutting impeller 150 forms a vortex during rotation, and the vortex and the swirl formed by the guide part 132 form a combined force to rotate the lifted fine mud powder into the slag storage chamber, further enhancing the debris cleaning ability of the drilling debris removal device.

[0035] In one embodiment of the present invention, Figure 2As shown, the central pipe assembly 200 includes two central pipe bodies 210, an upper conical coupling 220 and a lower conical coupling mechanism. The outer diameters of the two central pipe bodies 210 are equal and the two central pipe bodies 210 are coaxially arranged. The two central pipe bodies 210 are connected in sequence. Specifically, the upper end of the lower central pipe body 210 is provided with an external thread, and the inner wall of the lower end of the upper central pipe body 210 is provided with an internal thread. The two central pipe bodies 210 are connected together by the cooperation of the internal thread and the external thread. The lower central pipe body 210 is located inside the slag storage pipe 120, and the upper central pipe body 210 is located inside the water filter pipe 130. When the drilling footage to be drilled is short, only the upper central pipe body 210 can be used. The cutting impeller 150 is sleeved on the outer periphery of the upper central pipe body 210. When the cutting impeller 150 rotates, the upper central pipe body 210 rotates along with it.

[0036] The upper conical adapter 220 is used to connect the drilling debris removal device with the upper drill pipe 400. The outer diameter of the upper conical adapter 220 is equal to the outer diameter of the upper central pipe body 210, and the upper conical adapter 220 is coaxially arranged with the upper central pipe body 210. The upper conical adapter 220 is connected to the upper end of the upper central pipe body 210 and the upper drill pipe 400. Specifically, the upper end of the upper conical adapter 220 is threadedly connected to the upper drill pipe 400, and the lower end of the upper conical adapter 220 is threadedly connected to the upper end of the upper central pipe body 210. Preferably, the upper conical adapter 220 is provided with a slot to facilitate the installation and removal of the upper conical adapter 220 using tools.

[0037] The lower conical coupling mechanism is used to connect the drilling debris removal device with the drill bit 300 or the core tube. The upper end of the lower conical coupling mechanism passes through the bottom cover 110 and is connected to the lower end of the lower center tube body 210. The lower end of the lower conical coupling mechanism is connected to the drill bit 300 or the core tube.

[0038] In one embodiment of the present invention, Figure 2 As shown, the lower conical take-over mechanism includes a connecting shaft 230 and a lower conical take-over body 240. The upper end of the connecting shaft 230 penetrates the bottom cover 110 and is connected to the lower end of the lower central tube body 210. Specifically, the connecting shaft 230 penetrates the bottom cover 110, and the connecting shaft 230 is welded to the bottom cover 110. Of course, the connecting shaft 230 can also be integrally formed with the bottom cover 110, and the upper end of the connecting shaft 230 is threadedly connected to the lower end of the lower central tube body 210 to facilitate the removal and installation of the connecting shaft 230.

[0039] The lower conical take-over body 240 is coaxially arranged with the connecting shaft 230, the upper end of the lower conical take-over body 240 is connected with the lower end of the connecting shaft 230, and the lower end of the lower conical take-over body 240 is connected with the drill bit 300 or the core tube. Specifically, the upper end of the lower conical take-over body 240 is threadedly connected with the lower end of the connecting shaft 230, and the lower end of the lower conical take-over body 240 is threadedly connected with the drill bit 300 or the core tube.

[0040] Furthermore, the interiors of the two center pipe bodies 210, the upper conical coupling 220, the connecting shaft 230 and the lower conical coupling body 240 are all hollow structures. After the above components are connected, a drilling flushing fluid channel is formed, so that the flushing fluid input by the drilling rig 500 can be transported to the inside of the drill bit 300 through the drilling flushing fluid channel, and finally flow out through the fluid outlet of the drill bit 300.

[0041] In one embodiment of the present invention, Figure 2 and Figure 3 As shown, the guide portion 132 is a spiral rib, and the spiral rib extends spirally along the axis of the water filter and slag storage pipe assembly 100. Specifically, the outer peripheral surface of the water filter pipe 130 and the outer peripheral surface of the slag storage pipe 120 are both provided with spiral ribs, and the spiral ribs are welded to the outer peripheral surface of the water filter pipe 130 and the outer peripheral surface of the slag storage pipe 120, or can be integrally formed on the outer peripheral surface of the water filter pipe 130 and the outer peripheral surface of the slag storage pipe 120. The spiral ribs can be provided continuously or intermittently. When the water filter and slag storage pipe assembly 100 drives the spiral ribs to rotate, the flushing liquid forms a vortex during the rotation of the spiral ribs, and the fine mud powder is lifted.

[0042] like Figure 1 As shown, the present invention also provides a construction method of a drilling debris removal device, and the construction method is based on the drilling debris removal device described in any one of the above embodiments, comprising: Step S100, connecting the lower end of the central tube assembly 200 to the drill bit 300 or the core tube, and connecting the upper end of the central tube assembly 200 to the upper drill rod 400; It should be noted here that the construction method using the drilling debris removal device is used in the process of observing the loss of flushing fluid when drilling into a fractured formation, and clear water drilling is used.

[0043] Step S200, lowering the drilling debris removal device into the well along with the drilling tool; Step S300, the drilling rig 500 drives the drilling debris removal device to rotate through the drill pipe, and the rotating guide part 132 drives the flushing fluid and debris at the bottom of the well to flow upward, so that the debris can enter the slag storage chamber through the slag inlet; Step S400, after a round of drilling is completed, the drilling tool and the drilling debris removal device are lifted out of the well; Step S500, separating the drilling tool from the drilling debris removal device, and taking out the debris stored in the drilling debris removal device; Step S600, repeat the above steps in sequence to perform the next round of drilling operation.

[0044] In one embodiment of the present invention, the step of removing the debris stored in the while drilling debris removal device comprises: Step S510: disassembling the upper conical handle 220 and the crushing assembly; Step S520: taking out the debris from the slag storage chamber through the slag inlet.

[0045] During the actual measurement of the flushing fluid loss in the high water-conducting fracture zone of the coal mine, the drilling encountered a fractured stratum, and the pumping of clean water flushing fluid had insufficient carrying capacity. The debris generated by drilling continued to deposit at the bottom of the well, adsorbed and squeezed each other until compacted, greatly increasing the construction safety risk, and at the same time interfering with the observation of the flushing fluid loss in the water-conducting fracture zone. Therefore, a debris removal device is installed between the drill bit 300 and the drill rod, which can effectively remove fine debris or fine solid particles such as mud powder in the bottom hole fluid during the drilling construction. The main function of this device is first to clean fine debris, mud powder and other wastes while drilling to maintain the cleanliness of the drilling fluid; secondly, to reduce the wear of the waste on the drill bit 300 and the drilling tools, and extend the service life of the drill bit 300; and thirdly, to improve the drilling efficiency and the porosity, effectively reduce the risk of buried drilling accidents during drilling in complex strata, especially during coring operations, and greatly reduce the drilling cost.

[0046] In one embodiment of the present invention, before observing the loss of flushing fluid in the water-conducting fracture zone, the properties and structural characteristics of the rock layer on the top of the working face are deeply analyzed. Different rock layers will produce different fragmentation characteristics during the drilling process. These characteristics have a direct impact on the selection of drilling technology. Especially in the process of conducting scientific research tests such as actual measurements in water-conducting fracture zones, the characteristics of the overburden rock on the top of the working face are fully understood, and a reasonable drilling technology is accurately selected, which can not only meet the construction safety, but also ensure the reliability of the scientific research test results such as actual measurements in water-conducting fracture zones. The drilling debris removal device provided by the present invention is mainly aimed at special strata, which are conglomerates or siltstones with relatively high hardness. The drill cuttings generated by this rock layer during the drilling process are mainly gravel particles or siltstone fragments. The traditional method of increasing the pump displacement or appropriately increasing the viscosity of the flushing fluid is not an ideal technical means in terms of construction safety or improving the reliability of test results.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drilling debris removal device, characterized in that: include: A water filtering and slag storage pipe assembly (100), wherein the interior of the water filtering and slag storage pipe assembly (100) comprises a slag storage cavity, and the upper end of the water filtering and slag storage pipe assembly (100) is provided with a slag inlet; a central tube assembly (200), the central tube assembly (200) being inserted into the slag storage chamber, the lower end of the central tube assembly (200) penetrating the bottom wall of the slag storage chamber and then connected to a drill bit (300) or a coring tube, and the upper end of the central tube assembly (200) extending out of the slag inlet and then connected to an upper drill rod (400); The outer peripheral surface of the water filtering and slag storage pipe assembly (100) is provided with a guide portion (132), and the guide portion (132) is used to drive the flushing liquid and debris at the bottom of the well to flow upward when the water filtering and slag storage pipe assembly (100) rotates, so that the debris can enter the slag storage chamber through the slag inlet.

2. The drilling debris removal device according to claim 1, characterized in that: The water filtration and slag storage pipe assembly (100) comprises: Bottom cover (110); A slag storage pipe (120), the lower end of the slag storage pipe (120) being connected to the bottom cover (110); A water filter pipe (130), the lower end of the water filter pipe (130) being connected to the upper end of the slag storage pipe (120), the outer peripheral surface of the upper end of the slag storage pipe (120) being provided with a plurality of water filter holes (131), and the slag inlet being located on the upper end surface of the slag storage pipe (120).

3. The drilling debris removal device according to claim 2, characterized in that: The drilling debris removal device also includes: A crushing assembly, the crushing assembly comprising a connecting sleeve (140) and a cutting impeller (150), the connecting sleeve (140) being arranged at the slag inlet, the cutting impeller (150) being arranged inside the connecting sleeve (140) and sleeved on the outer peripheral surface of the central tube assembly (200), the cutting impeller (150) being used to crush the debris entering through the slag inlet during rotation.

4. The drilling debris removal device according to claim 3, characterized in that: The water filter pipe (130) and the slag storage pipe (120) are both coaxially arranged with the central pipe assembly (200).

5. The drilling debris removal device according to claim 4, characterized in that: The connecting sleeve (140) is threadedly connected to the slag inlet, the lower end of the water filter pipe (130) is threadedly connected to the upper end of the slag storage pipe (120), and the lower end of the slag storage pipe (120) is threadedly connected to the bottom cover (110).

6. The drilling debris removal device according to any one of claims 3 to 5, characterized in that: The central tube assembly (200) comprises: Two central tube bodies (210), the two central tube bodies (210) being connected in sequence, the lower central tube body (210) being located inside the slag storage pipe (120), the upper central tube body (210) being located inside the water filter pipe (130), and the cutting impeller (150) being sleeved on the outer periphery of the upper central tube body (210); An upper conical connector (220), the upper conical connector (220) being connected to the upper end of the upper central pipe body (210) and an upper drill rod (400); A lower conical coupling mechanism, the upper end of which passes through the bottom cover (110) and is connected to the lower end of the central pipe body (210) at the bottom, and the lower end of which is connected to a drill bit (300) or a core pipe.

7. The drilling debris removal device according to claim 6, characterized in that: The lower conical receiving mechanism comprises: A connecting shaft (230), the upper end of the connecting shaft (230) passing through the bottom cover (110) and then connected to the lower end of the central tube body (210) at the bottom; A lower conical coupling body (240), the upper end of which is connected to the lower end of the connecting shaft (230), and the lower end of which is connected to a drill bit (300) or a core tube.

8. The drilling debris removal device according to any one of claims 1 to 5, characterized in that: The flow guide portion (132) is a spiral rib, and the spiral rib extends spirally along the axis of the water filtration and slag storage pipe assembly (100).

9. A construction method for a drilling debris removal device, the construction method being based on the drilling debris removal device according to any one of claims 1 to 8, characterized in that: include: The lower end of the central tube assembly (200) is connected to a drill bit (300) or a core pipe, and the upper end of the central tube assembly (200) is connected to an upper drill rod (400); Lowering the drilling debris removal device into the well along with the drilling tool; The drilling rig (500) drives the drilling debris removal device to rotate through the drill pipe, and the rotating guide part (132) drives the flushing fluid and debris at the bottom of the well to flow upward, so that the debris can enter the slag storage chamber through the slag inlet; After a round of drilling is completed, the drilling tool and the drilling debris removal device are lifted out of the well; Separating the drilling tool from the drilling-while-debris removal device, and taking out the debris stored in the drilling-while-debris removal device; Repeat the above steps in sequence to carry out the next round of drilling operations.

10. The construction method of the drilling debris removal device according to claim 6, characterized in that: The step of removing the debris stored in the drilling debris removal device comprises: Remove the upper conical handle (220) and the crushing assembly; The debris in the slag storage chamber is taken out through the slag inlet.

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