CN114412424B - Degradable ball type boosting joint for hydraulic/air conveying of underground coal mine sieve tube - Google Patents
Degradable ball type boosting joint for hydraulic/air conveying of underground coal mine sieve tube Download PDFInfo
- Publication number
- CN114412424B CN114412424B CN202111598792.3A CN202111598792A CN114412424B CN 114412424 B CN114412424 B CN 114412424B CN 202111598792 A CN202111598792 A CN 202111598792A CN 114412424 B CN114412424 B CN 114412424B
- Authority
- CN
- China
- Prior art keywords
- assembly
- joint
- section
- ball
- screen pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 210000001503 joint Anatomy 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 238000005553 drilling Methods 0.000 claims description 38
- 210000000078 claw Anatomy 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 13
- 238000006731 degradation reaction Methods 0.000 claims description 11
- 230000015556 catabolic process Effects 0.000 claims description 10
- 238000003801 milling Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 4
- 230000035515 penetration Effects 0.000 abstract description 2
- 230000011664 signaling Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000007281 self degradation Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000725 suspension Substances 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a degradable ball-type boosting joint for hydraulic/air transmission of a coal mine underground sieve tube, which is provided with the following components: the female joint assembly is provided with a push rod with a protruding end part at least along the axial direction; the male connector assembly is provided with a plugging ball assembly at least at the end part; the push rod axially corresponds to the plugging ball component. The boosting joint provided by the invention can effectively solve the problem of signaling after the sectional loading, connection, penetration and butt joint of the directional long-drilled large-diameter sieve tube are successful, can meet the use requirement of sectional hydraulic/air conveying of the large-diameter sieve tube, greatly increases the loading depth, improves the loading efficiency and effectively ensures the gas extraction effect.
Description
Technical Field
The invention belongs to the technical field of coal mine underground gas extraction drilling protection holes, and particularly relates to a degradable ball type boosting joint for hydraulic/air transmission of a coal mine underground screen pipe.
Background
Along with the increasing of the depth and difficulty of coal mining, how to control and utilize the gas well is a problem which needs to be solved urgently. The coal mine underground directional long-drilling gas extraction technology is one of the important means for controlling the gas in the coal mine underground, has the characteristics of controllable drilling track, large depth, long effective hole section distance and the like, and is widely applied. At present, the underground directional drilling gas extraction of the coal mine basically adopts two modes of open hole extraction and screen pipe guard hole extraction after hole completion, but the two modes have limitations, and the pure quantity and the extraction time of gas extraction are affected.
As directional drilling is longer and longer, the probability of drilling into complex stratum is greatly increased, and the problems of great loss of negative pressure along the way, easy collapse into the hole wall and blockage of the extraction channel exist in the process of hole extraction. The mode of putting the screen pipe into the guard hole after the hole is finished can effectively solve the problem of collapse and blockage of a gas extraction channel caused by hole collapse, but the screen pipe is difficult to realize in the whole section due to the fact that the directional drilling distance is longer and the track is complex. Currently, two common methods for inserting the screen pipe of the directional long drilling hole are available, one method is to insert the screen pipe into the hole directly from the bare hole after the directional drilling hole is lifted, or to push the screen pipe into the hole by using a screen pipe booster. However, as the drilling hole is long, the sinking resistance of the bare hole is large, and the screen pipe is easy to be damaged by pushing, pulling and extrusion; the second is that after the reaming tool is re-run and reamed, the screen pipe is run from the inner path of the drill rod, although the running resistance is smaller than that of the bare Kong Tuisong, for longer directional drilling, the screen pipe is easy to generate buckling effect, and the screen pipe is still difficult to run into the hole bottom. For this reason, the large diameter screen section hydraulic transmission technology has been developed specifically by the company Zhang Jinbao, inc. of Western An, china, coal, and the like to solve the above problems. The patent of the method for pushing and loading the large-diameter screen pipe in the coal mine underground directional long-drilled hole in sections is provided with a method for loading the screen pipe in sections by utilizing medium boosting, the pushing is changed into pulling, and a new thought is provided for realizing high-efficiency and long-distance loading of the large-diameter screen pipe.
In order to solve the problem of difficult undersetting of a large-diameter screen pipe of a directional long drilling hole in a coal mine, and simultaneously provide equipment support for a segmented large-diameter screen pipe and a running process method thereof, the degradable ball type boosting joint for hydraulic/air conveying of the screen pipe in the coal mine is researched by comprehensive experience and achievements of research in related fields for a long time through intensive research and design, and the problem is well solved.
Disclosure of Invention
The invention aims to provide a degradable ball-type boosting joint for hydraulic/air conveying of a coal mine underground screen pipe, which solves the problems of loading, connecting, penetrating, reporting and the like of the conveying of the coal mine underground directional long drilling screen pipe and has the characteristics of simple structure, convenient operation, easy maintenance and the like.
In order to solve the problems, the technical scheme adopted by the invention comprises the following steps:
A degradable ball-type boosting joint for hydraulic/air transmission of a coal mine well screen pipe is provided with: the female joint assembly is provided with a push rod with a protruding end part at least along the axial direction; the male connector assembly is provided with a plugging ball assembly at least at the end part; the push rod axially corresponds to the plugging ball component.
Optionally, the female connector assembly is provided with a female connector housing, and a bracket is radially arranged in the female connector housing; the push rod is axially arranged on the bracket, and the end part of the push rod extends in an axial suspension manner.
Optionally, the bracket is of a ring structure and is arranged in the female connector shell through a thread structure; the push rod is of a cylindrical rod body structure.
Optionally, a claw is embedded on the female connector housing, and an open end of the claw and a thrust end of the push rod are in the same direction.
Optionally, the number of the clamping jaws is multiple, and each clamping jaw is installed through a bolt and a torsion spring.
Optionally, the female connector shell is formed by butt joint of two sections of tubular structures, and the diameter of the first section of tubular structure is smaller than that of the second section of tubular structure; and an external thread is arranged outside the first section of tubular structure; the outer wall of the second section of tubular structure is embedded with a plurality of clamping claws.
Optionally, the male connector assembly is provided with a male connector housing, one end of the male connector housing is provided with a guide ring, and the inner diameter of the male connector housing is clamped with the plugging ball assembly and the baffle ring; the other end of the male connector shell is an open end.
Optionally, the plugging ball component is in a sphere structure, and the outer diameter of the sphere structure is equal to or larger than the inner diameter of at least one section of the male connector shell.
Optionally, the plugging ball component is provided with a hollow ball, and a hole body is embedded in the inner wall of the hollow ball; and injecting degradation liquid into the hollow sphere.
The invention relates to a method for conveying a coal mine underground sieve tube, which is carried out by adopting the degradable ball type boosting joint for hydraulic/air conveying of the coal mine underground sieve tube, and specifically comprises the following steps:
a. lifting the directional drilling tool out of the hole after the coal mine underground directional drilling is completed, and putting the directional drilling tool into the milling drilling tool to perform milling drilling to the bottom of the hole;
b. connecting a plurality of large-diameter sieve tubes end to form a segmented sieve tube assembly, wherein the tail part of the first segment sieve tube assembly is connected with a female joint assembly, the front end of the first segment sieve tube assembly is connected with a throttling supercharging tube, the front ends of the second segment sieve tube assembly and the subsequent sieve tube assembly are connected with a male joint assembly, and the tail part of the second segment sieve tube assembly is connected with the female joint assembly;
c. After the first section of screen pipe is put into the drill pipe, connecting the drill pipe to facilitate water and starting the water pump or the air compressor, gradually increasing the flow and pressure of the water pump or the air compressor, conveying the first section of screen pipe into the hole until the bottom of the hole, and removing the water;
d. After the second section of screen pipe is put into a milling drill pipe, connecting drill pipe water, starting a water pump or an air compressor, gradually increasing the flow and pressure of the water pump or the air compressor, utilizing the hydraulic effect on a plugging ball component of a male joint component, pushing the whole section of screen pipe to move forwards until the section of screen pipe is conveyed into a hole to be contacted with the previous section of screen pipe with large diameter, at the moment, leading the male joint component into a female joint component of the previous section of screen pipe by virtue of a guide ring until the end part of a push rod in the female joint component is contacted with the plugging ball component, stopping the movement of the plugging ball component, and enabling the screen pipe to drive the male joint component to move forwards continuously due to inertia, wherein the plugging ball component is disconnected with the conical surface of a male joint shell, and the hydraulic pressure or the air pressure is reduced; simultaneously, the claw of the female joint component of the upper section of sieve tube is buckled into the annular groove of the male joint component of the lower section of sieve tube;
e. if the pressure of the pump pressure or the air compressor is not reduced, the connection is not successful, the water supply or the compressed air is stopped, the water pressure or the air pressure is increased again, and the impact is carried out again until the pressure of the pump pressure or the air compressor is obviously reduced, so that the joint is proved to be connected in place, and the two sections of sieve tubes are successfully butted and communicated;
f. repeating the steps d and e, and circulating until the last section of large-diameter screen pipe is in place. And after the drilling tool is in place, all drilling tools in the hole are lifted, and the drilling tools are put into the hole pipe to seal the hole for extracting gas.
The degradable ball-type boosting joint for hydraulic/air conveying of the underground coal mine sieve tube can effectively solve the problem of signaling after the sectional loading, connection, penetration and butt joint of the large-diameter sieve tube with the directional long drilling hole are successful, can meet the use requirement of sectional hydraulic/air conveying of the large-diameter sieve tube, greatly increases the loading depth, improves the loading efficiency and effectively ensures the gas extraction effect.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a cross-sectional view of a male and female end of a degradable ball-type boosting joint for hydraulic/air transmission of a coal mine well screen in accordance with the present invention;
FIG. 2 is a cross-sectional view of the male and female end connection state of FIG. 1;
FIG. 3 is a cross-sectional view of a degradable occlusion ball assembly;
In the figure, a 1-female joint assembly, a 11-female joint shell, a 12-push rod, a 13-claw, a 14-locking nut, a 15-bolt, a 16-torsion spring and a 17-bracket are shown;
2-male connector assembly, 21-guide ring, 22-male connector shell, 23-plugging ball assembly, 231-plugging cap, 232-plug, 233-hollow ball, 234-degradation liquid and 24-baffle ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following examples, and it is apparent that the described examples are only some of the examples of the present invention, but not all of the examples. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention will be described in detail below with reference to the drawings and the detailed description.
The invention relates to the field of underground coal mine gas control engineering, in particular to a degradable ball type boosting joint for hydraulic/air transmission of an underground coal mine sieve tube, which is combined with figures 1-3. The joint adopts a central through hole type tubular structure, is arranged at two ends of the sectional large-diameter sieve tube, and is matched with a sieve tube hydraulic/air conveying process method. The main body structure of the degradable ball type boosting joint for hydraulic/air transmission of the underground sieve tube of the coal mine consists of a male joint component 2 and a female joint component 1; the box assembly 1 is secured within the bore at the end of the run-in screen by threads provided on the end. The male joint assembly 2 is mounted by means of an end screw thread to the front end of the screen to be run in. The plug ball assembly 23 is arranged inside the male joint assembly 2 and is used for plugging the flow passage during hydraulic or air transmission so as to build pressure, and simultaneously providing driving force to assist the large-diameter sieve tube to move towards the hole bottom and complete the butt joint of the two sieve tubes. When the male joint component 2 and the female joint component 1 are in butt joint, the claw 12 arranged in the circumferential direction of the female joint component 1 can clamp the annular groove arranged at the end part of the male joint component 2 under the action of the torsion spring 16, so that the connection of two sections of sieve tubes is realized; meanwhile, the push rod 12 in the female joint assembly 1 can reversely push away the plugging ball assembly 23, and the center of the whole section of large-diameter sieve tube is penetrated; at this time, because the internal channel of the pipeline is opened, the driving water pressure (air pressure) can be obviously reduced, and whether the device is successfully connected can be known through the fluctuation signal of the pressure. The plugging ball assembly 23 will degrade in a short period of time to ensure the flow area in the screen. The method is sequentially adopted to connect the large-diameter sieve tube through the boosting joint and gradually enter the sieve tube, and finally the gas extraction channel of the directional long drilling hole is formed. The hollow sphere 233 and the degradation liquid 234 used in the invention are common materials in the degradation material field, such as the hollow sphere 233 and the degradation liquid 234 thereof made of PGA provided by Nanjing first plastic special engineering plastic products limited company.
The degradable ball-type boosting joint for hydraulic/air transmission of the underground sieve tube of the coal mine adopts a central through hole type cylindrical structure (shown in figures 1 and 2) and mainly comprises a female joint component 1 and a male joint component 2; the female joint assembly 1 consists of a female joint shell 11, a push rod 12, a claw 13, a lock nut 14, a bolt 15 and a torsion spring 16; the male connector assembly 2 consists of a guide ring 21, a male connector shell 22, a plugging ball assembly 23 and a baffle ring 24; the plugging ball assembly 23 is composed of a plugging cap 231, a plug 232, a hollow ball 233 and degradation liquid 234. Two parts of the screen pipe boosting joint are respectively arranged at two ends of the sectional large-diameter screen pipe; wherein, the female joint component 1 is arranged at the tail end of the screen pipe component, and the male joint component 2 is arranged at the front end of the screen pipe component.
The right end of the male connector shell 22 in the male connector assembly 2 is provided with an internal thread for connecting a male connector of a sieve tube, the outer side of the left end is provided with an annular groove for being connected with a claw of the female connector assembly, and the claw barb is matched for realizing axial fixation of the female connector assembly 1 and the male connector assembly 2. The inner side of the left end of the male connector shell 22 is connected with the guide ring 21 through threads, and the inner side of the right end of the connector is provided with a baffle ring 24 for limiting the axial movement of the degradable plugging ball assembly 23 and preventing the degradable plugging ball assembly from sliding out of the male connector shell 22. The baffle ring 24 is of an annular structure, is threaded on the outer side and is connected with the male connector assembly 2, and a porous structure is adopted in the baffle ring for limiting the axial movement of the degradable plugging ball assembly 23 and simultaneously guaranteeing the axial flow area in the connector. The left side of the guide ring 21 is of a conical structure, the conical size is taken from the diameters of the male connector assembly and the female connector assembly, the diameter of the inner hole of the salvaging drill rod is changed into the diameter of the outer thread, and the right side of the guide ring is processed into the outer thread to be matched with the male connector assembly 2.
The plugging ball assembly 23 is shown in fig. 3 and consists of a plugging cap 231, a plug 232, a hollow ball 233 and degradation liquid 234; the hollow ball 233 is made of degradable materials and is made into a hollow spherical structure with a smooth outer surface and a porous inner surface, and the outer surface can be matched with the conical surface on the inner side of the male connector shell 22 to realize unidirectional sealing from right to left; the inner surface adopts a porous structure, and the diameter a and the depth h of the inner hole can be set according to the depth of the hole in the sieve tube and the time required to be degraded. The larger the diameter a of the inner hole, the deeper the depth h, and the shorter the time required for complete degradation of the sphere. The plug 232 is fixed on the surface of the hollow sphere 233, and when the hollow sphere 233 is used, the plug is removed, and degradation liquid 234 can be injected into the sphere for realizing rapid dissolution of the hollow sphere 233. The blocking cap 231 is disposed at the upper end of the blocking cap 232, and the end of the blocking cap 231 adopts a spherical structure, and the spherical radius is the same as that of the hollow sphere 233, so as to maintain the regularity and smoothness of the spherical outer surface. The plugging ball assembly 23 establishes pressure, provides power and is connected with a through function after degradation, and the working principle is as follows: the male joint component 2 is connected with the whole-end large-diameter screen pipe, provides power for the whole-end screen pipe under the action of high-pressure water (compressed air), pushes the whole-section screen pipe to move forwards until the whole-section screen pipe is conveyed into a hole to be in contact with the previous-section large-diameter screen pipe, and at the moment, the male joint component 2 is led into the female joint component 1 of the previous-section screen pipe by virtue of a guide ring, and the connection of the two-section screen pipes is completed. Over time, the degradable plugging ball assembly 23 will automatically degrade away to ensure the maximum axial flow area of the screen.
The female joint housing 11 in the female joint assembly 1 is provided with external threads on the left side, four cuboid grooves and threaded holes are evenly distributed and processed on the right side pipe body due to the fact that the female joint is connected with a screen pipe, the cuboid grooves and the threaded holes are used for installing the clamping claws 13, the bolts 15 and the torsion springs 16, the inner side of the pipe body is connected with the support 17 through threads, and the push rod 12 is installed on the axis of the support 17 through threads and is prevented from loosening through the locking nuts 14. Four groups of claws 13 are distributed along the circumferential direction, the left side of each claw 13 is connected with four cuboid grooves in the circumferential direction of the female connector housing 11 through bolts 15, and two barbs are machined on the right side and used for respectively hooking two annular grooves of the male connector assembly 2. A torsion spring 16 is mounted between the jaws 13 and the female connector housing 11 by bolts 15 for providing a restoring force to the jaws 13 when the male connector assembly 2 and the female connector assembly 1 are mated.
The bracket 17 adopts a porous structure, so that the gas can flow through the area along the axial direction of the joint. The bracket 17 is fixed inside the female connector shell 11 through threads arranged on the outer circle; the center of the device is provided with a push rod 12 through threads, the outer surface of the push rod 12 is designed with a full-section thread, and the extension length of the push rod relative to a bracket 17 can be adjusted by rotating the push rod 12; the longer the extension length of the push rod 12, the more right the position of the degradable plugging ball assembly 23 is after the butt joint of the male joint assembly 2 and the female joint assembly 1 is completed, and the larger the flow passage area is opened at this time.
The working principle of the in-place reporting technology for the success or failure of the connection of the male connector component is as follows: when two sections of large-diameter sieve tubes are in butt joint, the degradable plugging ball assembly 23 is pushed away by the push rod 12, and the two sections of sieve tubes are communicated by self degradation of the degradable plugging ball assembly 23, and the connection of the single sieve tubes is realized by the grabbing buckle of the claw. There is a problem where field construction personnel need an explicit signal to confirm whether the two sections of screen are successfully connected and run through. After a screen pipe is put into a milling drilling tool, connecting drill rod water and starting a water pump (air compressor), gradually increasing the flow and pressure of the water pump (air compressor) to convey a segmented screen pipe into a hole by utilizing the hydraulic action, gradually increasing the flow and pressure of the water pump (air compressor), and pushing the whole segment of screen pipe to move forwards by the hydraulic action on a degradable plugging ball assembly 23 of a male joint assembly 2 until the end part of a push rod 12 in a female joint assembly 1 is contacted with the degradable plugging ball assembly 23, the degradable plugging ball assembly 23 stops moving, the screen pipe drives the male joint assembly 2 to move forwards continuously due to inertia, the degradable plugging ball assembly 23 is separated from the conical surface of the male joint shell 22, and the water pressure (air pressure) is reduced; at the same time, the jaws of the female joint component 1 of the previous section of sieve tube are buckled into the annular groove of the male joint component 2 of the next section of sieve tube. At the moment, the two sections of large direct sieve tubes are connected and form a center through with the sieve tube with the large diameter at the last section.
And observing the change of a pump pressure meter in the conveying process, wherein the pump pressure is increased by about 1MPa when the screen pipe is normally conveyed, the pump pressure is gradually increased when the male and female ends are contacted, and the second section screen pipe and the head section screen pipe are successfully butted after the pump pressure is quickly dropped, and the channels in the two sections screen pipes are communicated. If the pump pressure is always high, it indicates that the male end and the female end of the joint are not successfully docked, at this time, only the slurry pump control handle is operated, the direct switching between stopping and water supply is repeated, the degradable plugging ball assembly 23 can repeatedly plug the conical surface of the male joint assembly 2 to form pressure, and the screen pipe in the hole is driven to move forwards to complete docking again. Hole bottom reporting is needed here according to the pressure change of the pump to judge whether the connection is successful. At the initial stage of the opening of the water pump (air compressor), the screen pipe assembly moves in an accelerating way, the pressure of the water pump (air compressor) can also rise rapidly, the pressure can be stabilized gradually when the screen pipe assembly moves forward steadily, and the pump pressure can drop suddenly and greatly when the male and female connectors are successfully connected. And through observing the instant drop of the pump pressure, the successful report judgment of the screen pipe connection is realized.
Also disclosed is:
a. lifting the directional drilling tool out of the hole after the coal mine underground directional drilling is completed, and putting the directional drilling tool into the milling drilling tool to perform milling drilling to the bottom of the hole;
b. Connecting a plurality of large-diameter sieve tubes end to form a segmented sieve tube assembly, wherein the tail part of the first segment sieve tube assembly is connected with a female joint assembly 1, the front end of the first segment sieve tube assembly is connected with a throttling pressurizing tube, the front ends of the second segment and the subsequent sieve tube assemblies are connected with a male joint assembly 2, and the tail part of the second segment sieve tube assembly is connected with the female joint assembly 1;
c. After the first section of screen pipe is put into the drill pipe under the water, connecting the drill pipe, starting a water pump (air compressor), gradually increasing the flow and pressure of the water pump (air compressor), conveying the first section of screen pipe into the hole until the bottom of the hole, and discharging the water;
d. After the second section of screen pipe is put into a milling drill pipe, connecting drill pipe water and starting a water pump (air compressor), gradually increasing the flow and pressure of the water pump (air compressor), utilizing the hydraulic action on the degradable plugging ball component 23 of the male joint component 2, pushing the whole section of screen pipe to move forward until the segmented screen pipe is conveyed into a hole to be contacted with the screen pipe with the large diameter of the previous section, at the moment, leading the male joint component 2 into the female joint component 1 of the screen pipe with the large diameter of the previous section by virtue of a guide ring until the end part of the push rod 12 in the female joint component 1 is contacted with the degradable plugging ball component 23, stopping the movement of the degradable plugging ball component 23, leading the male joint component 2 to move forward by inertia, disconnecting the degradable plugging ball component 23 from the conical surface of the male joint shell 22, and reducing the water pressure (air pressure); simultaneously, the claw of the female joint component 1 of the previous section of sieve tube is buckled into the annular groove of the male joint component 2 of the next section of sieve tube;
e. If the pump pressure (air compressor pressure) does not drop, indicating that the connection is unsuccessful, stopping water supply (compressed air), and increasing the water pressure (air pressure) again to impact again until the pump pressure drops obviously, and proving that the joint is connected in place, and the two sections of sieve tubes are successfully butted and communicated;
f. repeating the steps d and e, and circulating until the last section of large-diameter screen pipe is in place. And after the drilling tool is in place, all drilling tools in the hole are lifted, and the drilling tools are put into the hole pipe to seal the hole for extracting gas.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (5)
1. The utility model provides a colliery is degradable ball formula boosting joint for screen pipe water conservancy/air transportation in pit which characterized in that sets up:
The female joint assembly (1), the female joint assembly (1) is provided with a push rod (12) with a protruding end part at least along the axial direction; the plug comprises a male connector assembly (2), wherein the end part of the male connector assembly (2) is clamped with a plugging ball assembly (23); the push rod (12) axially corresponds to the plugging ball assembly (23);
the female connector assembly (1) is provided with a female connector shell (11), and a bracket (17) is radially arranged in the female connector shell (11); the push rod (12) is axially arranged on the bracket (17), and the end part of the push rod (12) is axially suspended to extend and the extension length is adjustable;
the female connector shell (11) is formed by butt joint of two sections of tubular structures, and the diameter of the first section of tubular structure is smaller than that of the second section of tubular structure; and an external thread is arranged outside the first section of tubular structure; the outer wall of the second section of tubular structure is embedded with a plurality of clamping claws (13);
The number of the clamping claws (13) is multiple, and each clamping claw (13) is installed through a bolt (15) and a torsion spring (16);
The male connector assembly (2) is provided with a male connector shell (22), one end of the male connector shell (22) is provided with a guide ring (21), and the inner diameter of the male connector shell (22) is radially clamped with a plugging ball assembly (23) and a baffle ring (24); the other end of the male connector shell (22) is an open end;
The plugging ball assembly (23) consists of a plugging cap (231), a plug (232), a hollow ball (233) and degradation liquid (234), wherein the hollow ball (233) is of a hollow spherical structure with a smooth outer surface and a porous inner surface, the outer surface of the hollow ball (233) is matched with the conical surface of the inner side of the male connector shell (22) to realize unidirectional sealing from right to left, the inner surface of the hollow ball (233) is of a porous structure, and the larger the pore diameter a of the inner surface of the hollow ball (233) is, the deeper the depth h of the hollow ball is.
2. The degradable ball-type boosting joint for hydraulic/air transmission of a coal mine well screen pipe according to claim 1, wherein the bracket (17) is of a ring type structure, and the bracket (17) is installed in the female joint shell (11) through a thread structure; the push rod (12) is of a cylindrical rod body structure.
3. The degradable ball-type boosting joint for hydraulic/air transmission of underground coal mine sieve tube according to claim 2, wherein a clamping claw (13) is embedded on the female joint shell (11), and the open end of the clamping claw (13) is in the same direction as the thrust end of the push rod (12).
4. A degradable ball-type boosting joint for hydraulic/air transmission of a well screen of a coal mine according to claim 3, wherein the plugging ball assembly (23) has a ball structure, and the outer diameter of the ball structure is equal to or larger than the inner diameter of at least one section of the male joint housing (22).
5. A method of coal mine well screen pipe conveyance using a degradable ball-type booster joint for hydraulic/pneumatic conveyance of a coal mine well screen pipe as claimed in any one of claims 1 to 4, comprising:
a. lifting the directional drilling tool out of the hole after the coal mine underground directional drilling is completed, and putting the directional drilling tool into the milling drilling tool to perform milling drilling to the bottom of the hole;
b. Connecting a plurality of large-diameter sieve tubes end to form a segmented sieve tube assembly, wherein the tail part of the first-section sieve tube assembly is connected with a female joint assembly (1), the front end of the first-section sieve tube assembly is connected with a throttling booster pipe, the front ends of the second-section sieve tube assembly and the subsequent sieve tube assembly are connected with a male joint assembly (2), and the tail part of the second-section sieve tube assembly is connected with the female joint assembly (1);
c. after the first section of screen pipe is put into the drill pipe under the water, connecting the drill pipe, starting a water pump or an air compressor, gradually increasing the flow and pressure of the water pump (the air compressor), conveying the first section of screen pipe into the hole until the bottom of the hole, and discharging the water;
d. After the second section of screen pipe is put into a milling drill pipe, connecting drill pipe water and starting a water pump or an air compressor, gradually increasing the flow and pressure of the water pump or the air compressor, utilizing hydraulic or compressed air to act on a plugging ball assembly (23) of a male joint assembly (2), pushing the whole section of screen pipe to move forwards until the segmented screen pipe is conveyed into a hole to be contacted with the previous section of screen pipe with large diameter, at the moment, leading the male joint assembly (2) into a female joint assembly (1) of the previous section of screen pipe by virtue of a guide ring until the end part of a push rod (12) in the female joint assembly (1) is contacted with the plugging ball assembly (23), stopping the movement of the plugging ball assembly (23), leading the screen pipe to continuously move forwards due to inertia, disconnecting the plugging ball assembly (23) from the conical surface of a male joint shell (22), and reducing the hydraulic or air pressure; simultaneously, the claw (12) of the female joint component (1) of the previous section of sieve tube is buckled into the annular groove of the male joint component (2) of the next section of sieve tube;
e. if the pressure of the pump pressure or the air compressor is not reduced, the connection is not successful, the water supply or the compressed air is stopped, the water pressure or the air pressure is increased again, and the impact is carried out again until the pressure of the pump pressure or the air compressor is obviously reduced, so that the joint is proved to be connected in place, and the two sections of sieve tubes are successfully butted and communicated;
f. Repeating the steps d and e, circulating until the last section of large-diameter screen pipe is put into place, lifting all drilling tools in the hole after the last section of large-diameter screen pipe is put into place, and sealing holes of the hole entering pipe to extract gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111598792.3A CN114412424B (en) | 2021-12-24 | 2021-12-24 | Degradable ball type boosting joint for hydraulic/air conveying of underground coal mine sieve tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111598792.3A CN114412424B (en) | 2021-12-24 | 2021-12-24 | Degradable ball type boosting joint for hydraulic/air conveying of underground coal mine sieve tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114412424A CN114412424A (en) | 2022-04-29 |
| CN114412424B true CN114412424B (en) | 2024-06-04 |
Family
ID=81268884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111598792.3A Active CN114412424B (en) | 2021-12-24 | 2021-12-24 | Degradable ball type boosting joint for hydraulic/air conveying of underground coal mine sieve tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114412424B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204858187U (en) * | 2015-05-06 | 2015-12-09 | 中国石油天然气股份有限公司 | Horizontal well logging cable butt joint device |
| CN109915087A (en) * | 2019-04-01 | 2019-06-21 | 中煤科工集团西安研究院有限公司 | Segmentation major diameter screen casing and its tripping in method in underground coal mine directional long borehole |
| CN112664150A (en) * | 2020-12-10 | 2021-04-16 | 吉林石油装备技术工程服务有限公司 | Short section of drill rod for drilling of tandem type horizontal well |
| CN213980689U (en) * | 2020-10-27 | 2021-08-17 | 建湖县永维阀门钻件有限公司 | Safety type marine riser joint for offshore drilling |
| CN214741293U (en) * | 2021-04-26 | 2021-11-16 | 北京富达鑫辉能源科技有限公司 | Horizontal well fracturing tracer monitoring process device |
-
2021
- 2021-12-24 CN CN202111598792.3A patent/CN114412424B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204858187U (en) * | 2015-05-06 | 2015-12-09 | 中国石油天然气股份有限公司 | Horizontal well logging cable butt joint device |
| CN109915087A (en) * | 2019-04-01 | 2019-06-21 | 中煤科工集团西安研究院有限公司 | Segmentation major diameter screen casing and its tripping in method in underground coal mine directional long borehole |
| CN213980689U (en) * | 2020-10-27 | 2021-08-17 | 建湖县永维阀门钻件有限公司 | Safety type marine riser joint for offshore drilling |
| CN112664150A (en) * | 2020-12-10 | 2021-04-16 | 吉林石油装备技术工程服务有限公司 | Short section of drill rod for drilling of tandem type horizontal well |
| CN214741293U (en) * | 2021-04-26 | 2021-11-16 | 北京富达鑫辉能源科技有限公司 | Horizontal well fracturing tracer monitoring process device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114412424A (en) | 2022-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109915087B (en) | Subsection large-diameter sieve tube in coal mine underground directional long drill hole and running method thereof | |
| CN101666217B (en) | Core-filling drilling tool of rope side wall | |
| CN109653696B (en) | Natural gas hydrate rotary pressure-maintaining coring device | |
| CN114412425B (en) | Impact crushing type boosting joint for hydraulic/air conveying of underground coal mine sieve tube | |
| CN111997539B (en) | Mining forward and reverse rotation full-machine loading and unloading drill rod | |
| CN109667565B (en) | Bare hole anchoring device and process method | |
| CN110130848A (en) | A kind of universal dart and its Refloatation method | |
| CN201924856U (en) | Device capable of fishing bottom plugs of expansion pipe launching chambers | |
| CN110593853A (en) | System and method for continuously conveying coal mine underground directional long drill hole non-equal-diameter detection cable | |
| CN113882855A (en) | Plug-in type high-low pressure accurate switching slotting device, slotting device and using method | |
| CN114412424B (en) | Degradable ball type boosting joint for hydraulic/air conveying of underground coal mine sieve tube | |
| CN112324362B (en) | Positive and negative rotation automatic detachable drill rod | |
| CN115717510A (en) | Downhole docking tool, connecting male connector and free grasping and releasing connector | |
| CN111550195B (en) | Drill rod device free of pilot hole continuous same-direction jet grouting and high-pressure jet grouting pile construction method | |
| CN102182417A (en) | Fishing and expanding integrated expansion pipe patching tool | |
| CN109779543B (en) | Expansion pipe pressurization system | |
| CN108060901B (en) | Release mechanism for open hole patching tool of equal-well-diameter expansion casing | |
| CN214498970U (en) | Special slope guiding device for horizontal well | |
| CN216477319U (en) | Plug-in type high-low pressure accurate switching slotting device and slotting device | |
| CN113700522B (en) | Gas extraction process method for lower screen pipe while drilling and matched lower screen pipe drill bit | |
| CN202284458U (en) | Sealed backoff fishing spear | |
| CN214403495U (en) | Coring unit, coring tool and core coring tool | |
| CN208966768U (en) | A kind of all-hydraulic locking pushing mechanism | |
| CN103821472A (en) | Fishing bottom plug and fishing tool for expansion pipe | |
| CN114016920A (en) | Device and method for lowering large-diameter casing pipe in coal mine well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |