CN110671060A - Hydraulic type circulation while drilling short joint - Google Patents
Hydraulic type circulation while drilling short joint Download PDFInfo
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- CN110671060A CN110671060A CN201910988377.5A CN201910988377A CN110671060A CN 110671060 A CN110671060 A CN 110671060A CN 201910988377 A CN201910988377 A CN 201910988377A CN 110671060 A CN110671060 A CN 110671060A
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- 238000005553 drilling Methods 0.000 title claims abstract description 46
- 210000002445 nipple Anatomy 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 210000000664 rectum Anatomy 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241001661918 Bartonia Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/021—Devices for subsurface connecting or disconnecting by rotation
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a hydraulic type circulation-while-drilling nipple joint, which comprises an outer cylinder, an inner pipe, an upper fixed block, a rotating block, a lower fixed block and a lower joint, wherein a plurality of nozzles are arranged on the upper part of the side wall of the outer cylinder in a surrounding manner; the top of the rotating block and the lower part of the upper fixed block are of Z-shaped tooth structures which are mutually matched, trapezoidal bosses are uniformly distributed at intervals on the lower part of the rotating block, deep grooves and shallow grooves for the trapezoidal bosses to be inserted are formed in the upper part of the lower fixed block, and the inner pipe shields the nozzle when the trapezoidal bosses are inserted into the shallow grooves due to downward movement of the rotating block; the trapezoidal boss is inserted into the deep groove, and the nozzle cannot be shielded by the inner tube. The invention can clean the well or stop the leakage without tripping the drill, the operation times are not limited, and the construction time is saved.
Description
Technical Field
The invention belongs to the technical field of oil and gas drilling, and particularly relates to a hydraulic type circulation-while-drilling short joint.
Background
In the drilling process, the debris bed formed by underground accumulation is easy to cause the increase of friction torque, the drilling sticking risk is improved, the well body quality and the drilling speed of a construction well can be influenced, the traditional method for solving the well hole cleaning problem by simply relying on hydraulic parameter optimization and process improvement has certain limitation in field application and is difficult to achieve the satisfactory effect; in addition, if the well leakage occurs suddenly in the drilling process, the drill string in the well generally needs to be lifted out and then further processed due to the fact that the measuring instrument and the power drilling tool are connected in the drill string, so that not only is a large amount of drilling fluid lost and the non-production time increased, but also other complications can be caused, and huge risks are brought to drilling construction.
Therefore, based on the problems, the hydraulic opening/closing nozzle has important practical significance in that the nozzle can be opened at a well section where a detritus bed is easy to generate, the detritus bed and other impurities accumulated on a well wall can be cleaned, and when well leakage occurs, the nozzle can be opened to pump plugging materials into the well to directly perform plugging operation, so that underground construction risks are reduced, and the operation cost is saved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a hydraulic circulation nipple joint while drilling, which can open a nozzle at a well section where a detritus bed is easy to generate, clean the detritus bed and other impurities accumulated on a well wall, open the nozzle to pump plugging materials to directly perform plugging operation when well leakage occurs, reduce underground construction risks and save operation cost.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the utility model provides a hydraulic type is along with boring circulation nipple joint, includes urceolus, inner tube, goes up fixed block, rotatory piece, lower fixed block, lower clutch, urceolus one end is the toper interface that the internal diameter reduces gradually, and the other end can be dismantled with the lower clutch and be connected, just urceolus lateral wall upper portion encircles and sets up a plurality of nozzle, the inner tube is located the cavity that urceolus and lower clutch formed, the inner tube is the latus rectum structure, and its upper end is the toper structure that the inner wall diameter reduces gradually, the inner tube is the reducing structure that the upper portion external diameter is greater than the lower part external diameter, and the reducing department forms first stair structure, go up fixed block, rotatory piece, lower fixed block cover in proper order and establish the less end of inner tube external diameter, and go up fixed block, lower fixed block with urceolus fixed connection, rotatory piece in the;
the top of the rotating block and the lower part of the upper fixed block are of Z-shaped tooth structures which are mutually matched, trapezoidal bosses are uniformly distributed at intervals on the lower part of the rotating block, deep grooves and shallow grooves into which the trapezoidal bosses are inserted are formed in the upper part of the lower fixed block and are distributed at intervals, the inner pipe drives the rotating block to move downwards, so that when the trapezoidal bosses are inserted into the shallow grooves, the larger outer diameter end of the inner pipe shields the nozzle; when the inner tube drives the rotating block to move upwards to enable the top of the rotating block to be in contact with the lower part of the upper fixed block, the Z-shaped teeth are staggered to enable the rotating block to move clockwise to a Z-shaped tooth position, when the inner tube drives the rotating block to move downwards again, the trapezoidal boss is inserted into the deep groove, and the large outer diameter end of the inner tube cannot shield the nozzle, so that the outer part of the outer tube is communicated with the inside of the outer tube.
Furthermore, a spring is sleeved between the first step structure of the inner tube and the upper fixing block.
Further, still include light ball and block mechanism, block mechanism sets up in the cavity that inner tube and lower clutch formed of toper structure below, the light ball external diameter is greater than the minimum footpath of inner tube toper structure, can bear certain pressure, produces the deformation along with the pressure increase that receives, block mechanism blocks the light ball is deviate from the circulation nipple joint, just block mechanism does not hinder the drilling fluid flow through the circulation nipple joint.
Further, stop mechanism includes bottom sprag ring and top sprag ring, the top sprag ring diameter is less than the bottom sprag ring, and the bottom sprag ring is installed on inner tube or the lower clutch inner wall, many spinal branch vaulting poles of fixed connection between bottom sprag ring and the top sprag ring, the unable top sprag ring that passes through of light ball.
Furthermore, the rotating block is installed in a matched mode with the inner pipe through a second step structure on the inner pipe, the lower portion of the rotating block is fixedly connected with the outer wall of the bearing, and the inner wall of the bearing is fixedly connected with the outer wall of the inner pipe.
Furthermore, a groove is formed below the conical interface on the inner side of the outer barrel, a clamping ring is installed in the groove, and the clamping ring limits the inner pipe to be separated from the conical interface.
Furthermore, a limiting ring is clamped on the pipe wall of the inner pipe below the bearing.
Furthermore, at least 2 groups of O-shaped sealing rings are respectively arranged between the outer cylinder and the inner pipe and between the inner pipe and the lower joint.
Furthermore, a supporting sleeve is arranged between the outer cylinder and the inner pipe below the lower fixing block and fixedly connected with the inner side of the outer cylinder, and through holes are formed in the side wall of the outer cylinder on the periphery of the supporting sleeve.
Furthermore, an annular retaining ring is arranged at the first step structure of the inner pipe, and the spring is positioned between the first step structure and the upper fixing block.
The invention has the advantages and positive effects that:
1. according to the hydraulic type circulation-while-drilling short joint, the nozzle can be opened at a well section where a detritus bed is easy to generate by opening/closing the nozzle through hydraulic pressure under the control of the discharge capacity, the detritus bed and other impurities accumulated on a well wall can be cleaned, and when lost circulation occurs, the nozzle is opened to pump a lost circulation material to directly perform lost circulation operation, so that underground construction risks are reduced, and the operation cost is saved;
2. the invention can use the light ball to block the lower runner, open the nozzle, make the plugging material not enter drilling tools such as lower screw stem, instrument, etc., drill and carry on the multiple plugging operation;
3. when cleaning a well hole and plugging, the method does not need to take out the drill stem in the well and then further process the drill stem, thereby not only saving drilling fluid, but also reducing non-production time and improving the safety of field operation.
Drawings
The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus do not limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of a hydraulic circulation-while-drilling nipple provided by an embodiment of the invention;
fig. 2 is a partial structural schematic diagram of a hydraulic circulation-while-drilling nipple provided by an embodiment of the invention;
fig. 3 is a schematic view illustrating a combination principle of an upper fixed block, a rotating block, and a lower fixed block according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a blocking mechanism according to an embodiment of the present invention.
Detailed Description
First, it should be noted that the specific structures, features, advantages, etc. of the present invention will be specifically described below by way of example, but all the descriptions are for illustrative purposes only and should not be construed as limiting the present invention in any way. Furthermore, any individual technical features described or implicit in the embodiments mentioned herein may still be continued in any combination or subtraction between these technical features (or their equivalents) to obtain still further embodiments of the invention that may not be mentioned directly herein.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The present invention will be specifically described with reference to fig. 1 to 4.
Example 1
Fig. 1 is a schematic structural diagram of a hydraulic circulation-while-drilling nipple provided by an embodiment of the invention; fig. 2 is a partial structural schematic diagram of a hydraulic circulation-while-drilling nipple provided by an embodiment of the invention; fig. 3 is a schematic view illustrating a combination principle of an upper fixed block, a rotating block, and a lower fixed block according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of a blocking mechanism according to an embodiment of the present invention.
As shown in fig. 1 to 4, the hydraulic circulation-while-drilling nipple provided in this embodiment includes an outer cylinder 1, an inner pipe 4, an upper fixed block 7, a rotating block 8, a lower fixed block 11, and a lower joint 14, where one end of the outer cylinder 1 is a tapered interface 106 with an inner diameter gradually decreasing, the tapered interface 106 may be connected by a threaded connection drill assembly, and the other end is fixedly connected to the lower joint 14, and the upper portion of the sidewall of the outer cylinder 1 is surrounded by a plurality of nozzles 101, it should be noted that, in order to make the nozzles 101 better perform an injection function, the nozzles 101 may be considered as a structure with an inner diameter gradually increasing; the inner pipe 4 is located in a cavity formed by the outer cylinder 1 and the lower joint 14, the inner pipe 4 is of a drift diameter structure, the upper end of the inner pipe is a conical structure 401 with the inner diameter gradually reduced, the conical structure 401 has a throttling effect, hydraulic pressure is generated on the conical structure, the inner pipe 4 is pushed to move downwards by the pressure of the hydraulic pressure, the inner pipe 4 is of a reducing structure with the upper outer diameter larger than the lower outer diameter, a first step structure 402 is formed at the reducing position, the upper fixing block 7, the rotating block 8 and the lower fixing block 11 are sequentially sleeved at the smaller outer diameter end of the inner pipe 4, and the upper fixing block 7 and the lower fixing block 11 are fixedly connected with the outer cylinder 1;
it should be noted that the rotating block 8 is limited in the axial direction of the inner tube 4 and can rotate along the outer wall of the inner tube 4; specifically, in the present embodiment, it can be considered that: rotatory piece 8 passes through second stair structure 403 on the inner tube 4 is rather than the cooperation installation, just rotatory piece 8 lower part and bearing 9 outer wall fixed connection, bearing 9 inner wall with inner tube 4 outer wall fixed connection, consequently, rotatory piece 8 is spacing through second stair structure 403 and bearing 9 for rotatory piece 8 can not remove on inner tube 4 axial direction, because rotatory piece 8 lower part and bearing 9 outer wall fixed connection, consequently rotatory piece 8 can follow inner tube 4 circumferential direction.
The top of the rotating block 8 and the lower part of the upper fixed block 7 are both of Z-shaped tooth-shaped structures which are mutually matched, trapezoidal bosses 801 are uniformly distributed at intervals at the lower part of the rotating block 8, deep grooves 1101 and shallow grooves 1102 into which the trapezoidal bosses 801 are inserted are formed in the upper part of the lower fixed block 11, the deep grooves 1101 and the shallow grooves 1102 are distributed at intervals, the inner tube 4 drives the rotating block 8 to move downwards, so that when the trapezoidal bosses 801 are inserted into the shallow grooves 1102, the larger outer diameter end of the inner tube 4 shields the nozzle 101; when the inner tube 4 drives the rotating block 8 to move upwards to enable the top of the rotating block 8 to be in contact with the lower part of the upper fixed block 7, the Z-shaped teeth are staggered to enable the rotating block 8 to move one Z-shaped tooth position clockwise, when the inner tube 4 drives the rotating block 8 to move downwards again, the trapezoidal boss 801 is inserted into the deep groove 1101, the larger outer diameter end of the inner tube 4 cannot shield the nozzle 101, so that the outer cylinder 1 is communicated with the inside and the outside, and the specific structural and combination schematic diagram of the upper fixed block, the rotating block and the lower fixed block is shown in FIG. 3, when the top of the rotating block 8 is wedged with the Z-shaped teeth at the lower part of the upper fixed block 7, the trapezoidal boss 801 at the lower part of the rotating block 8 does not exactly correspond to the deep groove 1101 and the shallow groove 1102, therefore, when the inner tube 4 drives the rotating block 8 to move downwards to enable the trapezoidal boss 801 to move towards the, the inclined edge structure of the trapezoidal boss 801 enables the rotating block 8 to slightly rotate so as to be inserted into the shallow groove 1102, when the inner tube 4 drives the rotating block 8 to move upwards so that the top of the rotating block 8 is in contact with the lower part of the upper fixed block 7, the Z-shaped teeth are staggered so that the rotating block 8 moves clockwise by one Z-shaped tooth position, and when the inner tube 4 drives the rotating block 8 to move downwards again, the trapezoidal boss 801 slightly rotates and is inserted into the deep groove 1101, and the process is repeated.
Moreover, a spring 6 is sleeved between the first stepped structure 402 of the inner tube 4 and the upper fixed block 7, an annular retaining ring 5 is installed at the first stepped structure 402 of the inner tube 4, and the spring 6 is located between the first stepped structure 402 and the upper fixed block 7.
Further, it is contemplated in the present invention that: the drilling fluid circulation sub can further comprise a light ball 15 and a blocking mechanism, the blocking mechanism is arranged in a cavity formed by the inner pipe 4 and the lower joint 14 below the conical structure 401, the outer diameter of the light ball 15 is larger than the minimum diameter of the conical structure 401 of the inner pipe 4, the light ball can bear certain pressure and deform along with the increase of the pressure, the blocking mechanism blocks the light ball 15 from falling out of the circulation sub, and drilling fluid is not prevented from flowing through the circulation sub by the blocking mechanism;
in this embodiment, one may consider: the blocking mechanism comprises a bottom support ring 16 and a top support ring 18, the diameter of the top support ring 18 is smaller than that of the bottom support ring 16, the bottom support ring 16 is installed on the inner wall of the lower joint 14, a plurality of support rods 17 are fixedly connected between the bottom support ring 16 and the top support ring 18, and the light ball 15 cannot pass through the top support ring 18.
It should be noted that the light ball can be prepared by using the existing materials according to the actual requirements, which belongs to the technical means commonly used in the existing drilling technology and the technology well known by the technical personnel in the field.
A support sleeve 12 is arranged between the outer cylinder 1 and the inner pipe 4 below the lower fixing block 11, the support sleeve 12 and the inner side of the outer cylinder 1 are fixed through a set screw 105, and a through hole 104 is arranged on the side wall of the outer cylinder 1 at the periphery of the support sleeve 12.
It is also possible to consider: a snap ring 2 is arranged below the conical interface 106 on the inner side of the outer cylinder 1, and the snap ring 2 limits the inner pipe 4 to be separated from the conical interface 106 and move upwards.
For convenience of machining and part replacement, it is possible to consider: and a limiting ring 10 is clamped on the pipe wall of the inner pipe 4 below the bearing 9.
In order to improve the sealing performance of the circulation nipple, the following can be considered: at least 2 groups of O-shaped sealing rings, such as the O-shaped sealing ring 3 and the O-shaped sealing ring 13 in the figure 1, are respectively arranged between the outer cylinder 1 and the inner pipe 4 and between the inner pipe 4 and the lower joint 14.
In this embodiment, one may consider: the support sleeve 12 is mounted inside the outer cylinder 1 by a set screw 105.
It should be noted that the fixing and connecting manner in the present invention adopts conventional means such as bolts, rivets, welding, etc. which are mature in the prior art, and is not described herein again, but due to the above reasons, the repeated reproduction of those skilled in the art will not be affected.
For example, in the present embodiment, during normal drilling, the inner tube 4 moves downward under the action of drilling fluid and presses the spring 6 until the top end of the trapezoidal boss 801 at the lower end of the rotating block 8 corresponds to the shallow groove at the upper end of the lower fixed block 11, the inner tube 4 is restricted from moving downward, and the nozzle 101 is in a closed state;
when the well needs to be cleaned, the pump is stopped, the spring 6 pushes the inner tube 4 to move upwards to drive the rotating block 8 to move upwards, when the top end of the rotating block 8 reaches the lower end of the upper fixed block 7, the inclined plane at the top end of the rotating block 8 corresponds to the inclined plane at the bottom end of the upper fixed block 7, and the rotating block 8 is driven to rotate until the vertical sections of the top end of the rotating block 8 and the bottom end of the upper fixed block 7 are overlapped;
and starting the pump again, enabling the inner pipe 4 to move downwards under the action of the drilling fluid and compressing the spring 6, enabling the trapezoidal boss at the lower end of the rotating block 8 to correspond to the deep groove at the upper end of the lower fixing block 11, enabling the inner pipe 4 to move downwards until the nozzle 101 is completely opened, adjusting the inner pipe to the normal construction displacement, reducing the pump pressure by 1-3MPa compared with that before stopping the pump, and calculating specific reduction values in advance according to different nozzle sizes to judge whether the nozzle 101 is normally opened or not.
After the well is cleaned, the pump is stopped again, the spring 6 pushes the inner tube 4 to move upwards to drive the rotating block 8 to move upwards, when the top end of the rotating block 8 reaches the lower end of the upper fixed block 7, the inclined plane at the top end of the rotating block 8 corresponds to the inclined plane at the bottom end of the upper fixed block 7, the rotating block 8 is driven to rotate until the top end of the rotating block 8 and the vertical section at the bottom end of the upper fixed block 7 coincide, at the moment, the trapezoidal boss at the lower end of the rotating block 8 corresponds to the shallow groove at the upper end of the lower fixed block 11, the nozzle 101 can be closed.
When the well leakage occurs, putting the light ball 15, and calculating the time for the light ball 15 to reach the circulation-while-drilling short joint according to the volume of the drilling fluid pumped after the ball is put; if the nozzle 101 is in a closed state, the pump is stopped once in advance before the light ball 15 reaches the while-drilling circulation nipple, and whether the nozzle is normally opened or not is judged according to the change of the pump pressure after the pump is started; if the nozzle 101 is in an open state, the discharge capacity is properly reduced before the light ball 15 reaches the while-drilling circulation nipple; the light ball 15 falls to the conical structure 401 of the inner pipe to block a lower runner, the pump pressure rises at the moment, the plugging operation is started, and the plugging material enters an annular space formed by the drilling tool and the well hole through the nozzle 101; after the plugging is finished, the pump is stopped once, the pump is started again, the nozzle 101 is in a closed state, the pressure applied to the light ball 15 is increased, when the pressure reaches a set value, the light ball 15 deforms and falls into the upper portion of the top supporting ring 18 through the inner side of the inner pipe 4, and fluid flows through the drilling tool at the lower portion to recover normal drilling operation.
The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. A hydraulic type circulation while drilling nipple is characterized in that: including urceolus (1), inner tube (4), go up fixed block (7), rotatory piece (8), fixed block (11), lower clutch (14) down, urceolus (1) one end is toper interface (106) that the internal diameter reduces gradually, and the other end can be dismantled with lower clutch (14) and be connected, just urceolus (1) lateral wall upper portion encircles and sets up a plurality of nozzle (101), inner tube (4) are located in urceolus (1) and the cavity that lower clutch (14) formed, inner tube (4) are the latus rectum structure, and its upper end is toper structure (401) that the inner wall diameter reduces gradually for the inner wall diameter, inner tube (4) are the reducing structure that the upper portion external diameter is greater than the lower part external diameter, and reducing department forms first stair structure (402), go up fixed block (7), rotatory piece (8), lower fixed block (11) are established in proper order and are held in inner tube (4) external diameter is less, and, The lower fixing block (11) is fixedly connected with the outer cylinder (1), and the rotating block (8) is limited in the axial direction of the inner pipe (4) and can rotate along the outer wall of the inner pipe (4);
the top of the rotating block (8) and the lower part of the upper fixed block (7) are Z-shaped tooth-shaped structures which are matched with each other, trapezoidal bosses (801) are uniformly distributed at intervals on the lower part of the rotating block (8), deep grooves (1101) and shallow grooves (1102) for the trapezoidal bosses (801) to be inserted are formed in the upper part of the lower fixed block (11), the deep grooves (1101) and the shallow grooves (1102) are distributed at intervals, the inner pipe (4) drives the rotating block (8) to move downwards, so that when the trapezoidal bosses (801) are inserted into the shallow grooves (1102), the larger outer diameter end of the inner pipe (4) shields the nozzle (101); the inner tube (4) drives the rotating block (8) to move upwards so that the top of the rotating block (8) is contacted with the lower part of the upper fixed block (7), the Z-shaped teeth are staggered to enable the rotating block (8) to move clockwise by one Z-shaped tooth position, when the inner tube (4) drives the rotating block (8) to move downwards, the trapezoidal boss (801) is inserted into the deep groove (1101), and the larger outer diameter end of the inner tube (4) cannot shield the nozzle (101), so that the outer tube (1) is communicated with the inside and the outside.
2. The hydraulic circulation-while-drilling sub of claim 1, wherein: and a spring (6) is sleeved between the first step structure (402) of the inner pipe (4) and the upper fixing block (7).
3. The hydraulic circulation-while-drilling sub of claim 1 or 2, wherein: still include light ball (15) and block mechanism, block mechanism sets up in the cavity that inner tube (4) and lower clutch (14) formed of toper structure (401) below, light ball (15) external diameter is greater than the minimum footpath of inner tube (4) toper structure (401), can bear certain pressure, produces the deformation along with the pressure increase that receives, block mechanism blocks light ball (15) are deviate from the circulation nipple joint, just block mechanism does not hinder the drilling fluid and flows through the circulation nipple joint.
4. The hydraulic circulation-while-drilling sub of claim 3, wherein: the blocking mechanism comprises a bottom support ring (16) and a top support ring (18), the diameter of the top support ring (18) is smaller than that of the bottom support ring (16), the bottom support ring (16) is installed on the inner wall of the inner pipe (4) or the lower joint (14), a plurality of support rods (17) are fixedly connected between the bottom support ring (16) and the top support ring (18), and the light ball (15) cannot pass through the top support ring (18).
5. The hydraulic circulation-while-drilling sub of claim 1, wherein: the rotating block (8) is installed in a matched mode through a second step structure (403) on the inner pipe (4), the lower portion of the rotating block (8) is fixedly connected with the outer wall of the bearing (9), and the inner wall of the bearing (9) is fixedly connected with the outer wall of the inner pipe (4).
6. The hydraulic circulation-while-drilling sub of claim 1, wherein: a groove is formed below the conical interface (106) on the inner side of the outer barrel (1), a clamping ring (2) is installed in the groove, and the clamping ring (2) limits the inner tube (4) to be separated from the conical interface (106).
7. The hydraulic circulation-while-drilling sub of claim 4, wherein: and a limiting ring (10) is clamped on the pipe wall of the inner pipe (4) below the bearing (9).
8. The hydraulic circulation-while-drilling sub of claim 1, wherein: at least 2 groups of O-shaped sealing rings are respectively arranged between the outer cylinder (1) and the inner pipe (4) and between the inner pipe (4) and the lower joint (14).
9. The hydraulic circulation-while-drilling sub of claim 1, wherein: a supporting sleeve (12) is arranged between the outer cylinder (1) and the inner pipe (4) below the lower fixing block (11), the supporting sleeve (12) is fixedly connected with the inner side of the outer cylinder (1), and through holes (104) are formed in the side wall of the outer cylinder (1) on the periphery of the supporting sleeve (12).
10. The hydraulic circulation-while-drilling sub of claim 2, wherein: an annular retaining ring (5) is arranged at a first step structure (402) of the inner pipe (4), and the spring (6) is located between the first step structure (402) and the upper fixing block (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910988377.5A CN110671060B (en) | 2019-10-17 | 2019-10-17 | Hydraulic type circulation while drilling short joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910988377.5A CN110671060B (en) | 2019-10-17 | 2019-10-17 | Hydraulic type circulation while drilling short joint |
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| Publication Number | Publication Date |
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| CN110671060A true CN110671060A (en) | 2020-01-10 |
| CN110671060B CN110671060B (en) | 2021-04-23 |
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| CN201910988377.5A Active CN110671060B (en) | 2019-10-17 | 2019-10-17 | Hydraulic type circulation while drilling short joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116624109A (en) * | 2023-07-25 | 2023-08-22 | 成都阿斯贝瑞科技有限公司 | Multi-pitching variable-diameter hydraulic centralizer |
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| CN116624109A (en) * | 2023-07-25 | 2023-08-22 | 成都阿斯贝瑞科技有限公司 | Multi-pitching variable-diameter hydraulic centralizer |
| CN116624109B (en) * | 2023-07-25 | 2023-09-19 | 成都阿斯贝瑞科技有限公司 | Multi-pitching variable-diameter hydraulic centralizer |
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|---|---|
| CN110671060B (en) | 2021-04-23 |
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