CN114622852A - Circulation switching device and method for dry gas and atomized continuous circulation drilling - Google Patents
Circulation switching device and method for dry gas and atomized continuous circulation drilling Download PDFInfo
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- CN114622852A CN114622852A CN202110805034.8A CN202110805034A CN114622852A CN 114622852 A CN114622852 A CN 114622852A CN 202110805034 A CN202110805034 A CN 202110805034A CN 114622852 A CN114622852 A CN 114622852A
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- circulation
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- valve
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/02—Swivel joints in hose-lines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
- E21B21/106—Valve arrangements outside the borehole, e.g. kelly valves
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
Abstract
The invention provides a circulation switching device and a switching method for dry gas and atomized continuous circulation drilling. The circulation switching method of the dry gas and atomized continuous circulation drilling is realized through the circulation switching device, and the method comprises the step of controlling the positive circulation process, the side circulation process, the positive circulation-to-side circulation process and the side circulation-to-positive circulation process of the dry gas and atomized continuous circulation drilling. The beneficial effects of the invention can include: the circulation mode switching device and the circulation mode switching method for continuous circulation drilling are provided, and underground complex conditions caused by circulation interruption and large pressure fluctuation are avoided.
Description
Technical Field
The invention relates to the technical field of petroleum drilling devices, in particular to a circulation switching device and a circulation switching method for dry gas and atomized continuous circulation drilling.
Background
During drilling operations, when a single joint or column is connected and a drill is started or stopped, the pressure in the well is fluctuated due to the stopping or starting of the pump, and a series of complex problems are brought down in the well. The continuous circulation drilling technology is provided for solving the problem, and realizes continuous circulation when a single or an upright is connected and disconnected by switching the circulation path of the drilling circulation medium and combining with a continuous circulation valve on a drill string, so that constant drilling circulation displacement and equivalent density are maintained, and complicated accidents such as well wall collapse, overflow, sand setting and drill sticking caused by stopping circulation when the single or the upright is connected and disconnected are prevented; meanwhile, formation water entering a shaft can be continuously carried during gas drilling, so that water is prevented from accumulating in the shaft and soaking the wall of the shaft, overhigh injection pressure is avoided, and underground complexity of the gas drilling is avoided; during inflation and foam drilling, gas-liquid separation between the drilling tool and the annulus can be avoided, and constant fluid column pressure and injection pressure in a shaft can be ensured.
The patent number is CN102352732B, the name is runner conversion control system, discloses including mud filter equipment, communicating pipe, control valve, stand and central control system, and the action of central control system control valve. However, the system can only be used in mud and cannot be used in gas drilling.
The publication number is 104153729A, the name is shunt manifold for continuous cycle drilling, and discloses a loop pipe which is formed by a first switch valve, a second switch valve, a stand pipe auxiliary valve, a bypass filling valve, a bypass main valve and a third switch valve from a cycle medium inlet along the counterclockwise direction and then returns to the cycle medium inlet, a pipeline between the bypass main valve and the third switch valve is connected to a pipeline between the second switch valve and the stand pipe auxiliary valve through a stand pipe main valve and a stand pipe filling valve in sequence, the stand pipe auxiliary valve, the bypass main valve and the stand pipe main valve are all switch valves, and the bypass filling valve and the stand pipe filling valve are throttle valves. However, the system has too many valves and is complex, and accidents of hurting people due to misoperation occur in the actual field application process; in addition, after a single (stand column) is connected, a water tap and a water hole connected with the single (stand column) are not filled with a circulating medium, when the lateral circulation is reversed and the forward circulation is carried out, a forward circulating pipeline (the water tap and the connected stand column) needs to be filled with a certain time to achieve pressure balance, the continuous circulation is interrupted as a final result, the pressure fluctuation at the bottom of a well is large, and the complexity in the bottom of the well is caused when the pressure fluctuation is serious; in the same way, when the circulation is performed in a forward direction and in a reverse direction, a certain time is required for filling the circulation line in the lateral direction with the circulation medium.
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, it is an object of the present invention to provide a cyclic switching device for dry gas and atomized continuous cycle drilling. Another object of the present invention is to provide a cyclic switching method for dry gas and atomized continuous cycle drilling.
In order to achieve the above object, the present invention provides, in one aspect, a circulation switching device for dry gas and atomized continuous circulation drilling. The circulation switching device comprises a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, a first control valve, a second control valve, a third control valve, a fourth control valve, a first compensation valve, a second compensation valve, a pressure compensation pump, a circulation medium inlet, a positive circulation joint, a side circulation joint and a pressure relief joint, wherein one end of the first pipeline is connected with the circulation medium inlet, and the other end of the first pipeline is connected with the positive circulation joint; one end of the second pipeline is connected with the circulating medium inlet, and the other end of the second pipeline is connected with the side circulating joint; one end of the third pipeline is connected with the positive circulation joint, and the other end of the third pipeline is connected with the pressure relief joint; one end of the fourth pipeline is connected with the side circulation joint, and the other end of the fourth pipeline is connected with the pressure relief joint; the first control valve is arranged on a first pipeline, the second control valve is arranged on a second pipeline, the third control valve is arranged on a third pipeline, and the fourth control valve is arranged on a fourth pipeline; the pressure compensation pump is connected with the positive circulation joint through a fifth pipeline, and is also connected with the side circulation joint through a sixth pipeline; the first compensation valve is disposed on a fifth line and the second compensation valve is disposed on a sixth line.
In an exemplary embodiment of the one aspect of the present invention, the circulation switching means may further include a first pressure gauge provided on the positive circulation joint to display the pressure in the first line, and a second pressure gauge provided on the side circulation joint to display the pressure in the second line.
In an exemplary embodiment of an aspect of the present invention, the first and second control valves may be flat gate valves, the third and fourth control valves may be throttle valves, and the first and second compensation valves may be throttle valves.
In an exemplary embodiment of an aspect of the present invention, the circulation switching device may further include a hydraulic console connected to the first control valve, the second control valve, the third control valve, the fourth control valve, the first compensation valve, and the second compensation valve, respectively, to control opening and closing thereof.
In an exemplary embodiment of an aspect of the present invention, the circulation switching device may further include an uninterrupted circulation joint, the uninterrupted circulation joint includes a short connection unit and a movable docking unit, wherein the short connection unit includes an upper connection body, a lower connection body, a clutch device, a first inlet check valve and a second inlet check valve, the upper connection body and the lower connection body are rotatably connected from top to bottom, and both have hollow axial cavities, the axial cavities of the two are communicated with each other, and a through lateral connection port is further formed on a side wall of the upper connection body; the clutch device is sleeved on the upper connecting body and/or the lower connecting body and can enable the upper connecting body and the lower connecting body to keep relative rotation or synchronous rotation; the first inlet one-way valve is arranged in the upward opening of the upper connecting body, and the second inlet one-way valve is arranged in the side connecting opening of the upper connecting body; the movable butt joint unit comprises a side connecting mechanism, the side connecting mechanism comprises a side connector, the front end of the side connector is matched with the side connector and can be inserted into the side connector, the rear end of the side connector is provided with a port in butt joint with the drilling circulating medium pipeline, and the side connector is also provided with a hollow cavity for communicating the front end with the rear end; the positive circulation joint is connected with the first inlet one-way valve through a pipeline, and the side circulation joint is connected with the second inlet one-way valve through a pipeline.
In an exemplary embodiment of an aspect of the present invention, the mobile docking unit may further include a mobile seat on which the side connection mechanism is located; the lateral connecting mechanism comprises a hollow motor and a fastening sleeve, a rotary output hole of the hollow motor is kept horizontal, the fastening sleeve is fixed in the rotary output hole of the hollow motor, the fastening sleeve is sleeved on the lateral connecting head, and the front end of the fastening sleeve is positioned outside the hollow motor.
In an exemplary embodiment of an aspect of the present invention, the side connection mechanism may further include a torque limiter, a rotary table, and a lifting structure, wherein the torque limiter is fixed in a rotation output hole of the hollow motor, the fastening sleeve is fittingly connected to an inner cavity of the torque limiter, the fastening sleeve is sleeved on the side connection head, and a front end of the fastening sleeve is located outside the hollow motor; the front end of the fastening sleeve is matched with the lateral connecting port and can be screwed into the lateral connecting port; the rotating platform can rotate on the horizontal plane, and the hollow motor is fixed on the table top of the rotating platform; the lifting structure is located the revolving stage with remove between the seat to can adjust the revolving stage with remove the vertical distance between the seat.
In an exemplary embodiment of an aspect of the present invention, the clutch device may include a spline housing, a portion of the upper connecting body contacting the spline housing is a first spline shaft, a portion of the lower connecting body contacting the spline housing is a second spline shaft, both the first spline shaft and the second spline shaft are matched with the spline housing, the spline housing is capable of sliding back and forth on the first spline shaft and the second spline shaft, and the shorting unit further includes a first fixing member capable of fixing the spline housing and the first spline shaft; the upper connecting body comprises a connecting shaft, a clutch shaft, a limiting shaft and a rotating shaft which are sequentially connected from top to bottom, wherein the upper end of the connecting shaft can be also connected with a drilling tool, the first inlet one-way valve is arranged in an upward opening of the connecting shaft, and the second inlet one-way valve is arranged on the side wall of the connecting shaft; the clutch shaft is a spline shaft, and the radial size of the clutch shaft is smaller than that of the connecting shaft; the radial size of the limiting shaft is smaller than that of the lower end of the clutch shaft and that of the upper end of the rotating shaft; the lower connecting body is provided with an upper cavity and a lower cavity which are communicated up and down, the radial size of the upper cavity is larger than that of the lower cavity, and the rotating shaft can be placed in the upper cavity and is rotationally connected with the upper cavity and the lower cavity.
The invention also provides a circulation switching method for dry gas and atomized continuous circulation well drilling. The method is implemented by a cyclic switching device for dry gas and atomized continuous cycle drilling as described in any one of the above, and the method comprises the steps of: the positive cycle process: opening the first control valve, closing the second control valve, the third control valve, the fourth control valve, the first compensation valve and the second compensation valve, and allowing the medium fluid to enter from the circulating medium inlet and flow out from the positive circulation joint through the first pipeline; side circulation process: opening a second control valve, closing the first control valve, the third control valve, the fourth control valve, the first compensation valve and the second compensation valve, and allowing the medium fluid to enter from the circulating medium inlet and flow out from the side circulating joint through a second pipeline; the positive cycle changes the side cycle process: after the side circulation pipeline is connected, opening a pressure compensation pump, opening a second compensation valve, pumping circulation media into the second pipeline until the second pipeline and the side circulation pipeline are filled with the circulation media and the pressure in the second pipeline rises to be close to the pressure in the first pipeline, opening a second control valve, closing the pressure compensation pump and the second compensation valve, and establishing a side circulation channel; closing the first control valve to cut off the positive circulation channel, opening the third control valve to release pressure, and closing the third control valve after pressure release to finish the operation of positive circulation side-turning circulation; the side circulation to positive circulation process: after the positive circulation pipeline is connected, opening a pressure compensation pump, opening a first compensation valve, pumping circulation media into the first pipeline until the first pipeline and the positive circulation pipeline are filled with the circulation media and the pressure in the first pipeline rises to be close to the pressure in the second pipeline, opening a first control valve, closing the pressure compensation pump and the first compensation valve, and establishing a positive circulation channel; and closing the second control valve to cut off the side circulation channel, opening the fourth control valve to release pressure, and closing the fourth control valve after pressure release to finish the operation of side circulation to positive circulation.
In an exemplary embodiment of another aspect of the present invention, the pressure compensation range of the pressure compensation pump may be 0 to 15 Mpa.
In an exemplary embodiment of another aspect of the invention, the second in-line pressure increase to approximately the first in-line pressure may be greater than or equal to 95% of the second in-line pressure.
In an exemplary embodiment of another aspect of the invention, the increase in the first in-line pressure to approximately the second in-line pressure may be greater than or equal to 95% of the first in-line pressure.
In an exemplary embodiment of another aspect of the present invention, the pressure fluctuation range of the positive cycle to side cycle or side cycle to positive cycle may be 0 to 0.5 Mpa.
In an exemplary embodiment of another aspect of the present invention, the opening the third control valve to relieve pressure, and closing the third control valve after the relieving pressure may include closing the third control valve after the first line pressure drops to zero 10 s.
Compared with the prior art, the beneficial effects of the invention can include: the invention provides a circulation mode switching device for dry gas and atomization continuous circulation drilling, which is simple in structure and convenient to manufacture and maintain. In the continuous circulation drilling process, the circulation medium is ensured not to be interrupted, the problem of large pressure fluctuation in the switching process is solved, and the underground complex condition caused by circulation interruption and large pressure fluctuation is avoided.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
FIG. 1 shows a schematic structural diagram of a continuous cycle drilling cycle switching apparatus according to an exemplary embodiment of the present invention;
FIG. 2 shows a schematic of a structure of an uninterrupted circulation joint according to an exemplary embodiment of the present invention;
FIG. 3 shows a schematic diagram of a shorting cell of the present invention;
FIG. 4 shows an assembled schematic of the shorting unit of the present invention;
FIG. 5 shows a partial enlarged view at A in FIG. 2;
FIG. 6 shows a schematic structural view of a first lateral connector of the present invention;
fig. 7 shows a schematic view of the second lateral side joint of the present invention.
The reference numbers are as follows:
1-a first pipeline, 2-a second pipeline, 3-a third pipeline, 4-a fourth pipeline, 5-a fifth pipeline, 6-a sixth pipeline, 7-a first control valve, 8-a second control valve, 9-a third control valve, 10-a fourth control valve, 11-a first compensation valve, 12-a second compensation valve, 13-a pressure compensation pump, 14-a first pressure gauge, 15-a second pressure gauge, A1-a circulating medium inlet, A2-a positive circulating joint, A3-a side circulating joint, A4-a pressure relief joint, 16-an upper connecting body, 161-a connecting shaft, 1611-a clutch shaft, 162-a clutch shaft, 163-a limiting shaft, 1631-a limiting sleeve and 164-a rotating shaft; 17-lower connector, 171-upper cavity, 172-lower cavity, 173-rotor mounting hole, 174-blocking pin; 18-a clutch device; 191-a first inlet check valve, 192-a second inlet check valve; 20-a rotating member; 21-a seal; 221-a first fixture, 222-a second fixture; 23-a roller; 24-a leg; 25-a movable seat; 401-hollow motor, 402-torque limiter, 403-fastening sleeve, 404-side connector, 405-rotary table, 406-lifting structure; 50-a control cabinet; 60-a gate valve manifold prying body; 70-an integration box; 80-pipeline.
Detailed Description
Hereinafter, the circulation switching device and the switching method of dry gas and atomized continuous circulation drilling of the present invention will be described in detail with reference to the exemplary embodiments and the accompanying drawings. It should be noted that "first", "second", "third", "fourth", "fifth", "sixth", etc. are merely for convenience of description and for convenience of distinction, and are not to be construed as indicating or implying relative importance. "upper," "lower," "left," and "right" are merely for convenience of description and relative positional or orientational relationships, and do not indicate or imply that the referenced components must have that particular orientation or position.
The invention provides a circulation switching device for dry gas and atomized continuous circulation drilling.
Fig. 1 shows a schematic configuration of a continuous circulation drilling cycle switching apparatus according to an exemplary embodiment of the present invention.
In the first exemplary embodiment of the present invention, as shown in fig. 1, the circulation switching device of the dry gas and atomized continuous circulation drilling is mainly composed of a first line 1, a second line 2, a third line 3, a fourth line 4, a fifth line 5, a sixth line 5, a first control valve 7, a second control valve 8, a third control valve 9, a fourth control valve 10, a first compensation valve 11, a second compensation valve 12, a pressure compensation pump 13, a circulation medium inlet a1, a positive circulation joint a2, a side circulation joint A3, and a pressure relief joint a 4.
Wherein one end of the first pipeline 1 is connected with the circulating medium inlet A1, and the other end of the first pipeline 1 is connected with the positive circulation joint A2. The first pipeline 1 is also provided with a first control valve 7, and the medium fluid in the first pipeline 1 is controlled by opening and closing the first control valve 7. Here, the first control valve 7 may be a flat plate valve. One end of the second line 2 is connected to the circulation medium inlet a1, and the other end of the second line 2 is connected to the side circulation joint A3. The second line 2 is also provided with a second control valve 8, by means of which opening and closing of the second control valve 8 the medium flow in the second line 2 is controlled. Here, the second control valve 8 may be a flat plate valve. The first control valve and the second control valve are arranged as the flat valves, because the first control valve and the second control valve mainly play a role in stopping and shutting, the flat valves have small flow resistance, the sealing surfaces of the flat gate valves can be automatically positioned, and the sealing surfaces of the valve seats cannot be damaged by the thermal deformation of the valve body; and the sealing surface is not overloaded by the thermal elongation of the valve stem even if the valve is closed in a cold state. As shown in fig. 1, the first line 1, the second line 2 and the circulating medium inlet a1 may be connected by a first tee joint.
One end of the third line 3 is connected to the positive circulation joint a2, and the other end of the third line 3 is connected to the relief joint a 4. The third pipeline 3 is also provided with a third control valve 9, and the circulating medium fluid in the first pipeline 1 is decompressed through the opening and closing of the third control valve 9. One end of the fourth line 4 is connected to the side circulation joint A3, and the other end of the fourth line 4 is connected to the pressure relief joint a 4. The fourth pipeline 4 is also provided with a fourth control valve 10, and the circulating medium fluid in the second pipeline 2 is decompressed through the opening and closing of the fourth control valve 10. As shown in fig. 1, the first line 1, the third line 3, and the positive circulation joint a2 may be connected by a second tee; the third line 3, fourth line 4, and pressure relief fitting a4 may be connected by a third tee. Here, the third control valve 9 and the fourth control valve 10 may be throttle valves. The third control valve 9 and the fourth control valve 10 are provided as throttle valves because both of the valves are pressure release valves, and the throttle valves can be used to control the speed of pressure release, thereby ensuring the safety of the pressure release ports.
The pressure-compensating pump 13 is connected to the positive circulation connection a2 via a fifth line 5, and the pressure-compensating pump 13 is also connected to the side circulation connection A3 via a sixth line 6. A first compensation valve 11 is also arranged on the fifth line 5, and the medium flow through the fifth line 5 into the first line 1 is controlled by the opening and closing of the first compensation valve 11. A second compensation valve 12 is also arranged on the sixth line 6, the medium flow through the sixth line 6 into the second line 2 being controlled by the opening and closing of the second compensation valve 12. As shown in fig. 1, the first line 1, the third line 3, the fifth line 5 and the positive circulation joint a2 may be connected by a first four-way joint. The second line 2, the third line 3, the sixth line 6 and the side circulation joint a3 may be connected by a second four-way joint. Here, the first and second compensation valves 11 and 12 may be throttle valves. The first compensation valve 11 and the second compensation valve 12 are set as throttle valves because both valves are on-off valves of the compensation channel, and the speed of compensation can be controlled by using the throttle valves, so that the pressure fluctuation can be ensured to be in the range of 0-0.5 MPa. In the present exemplary embodiment, as shown in fig. 1, the circulation switching device may further include a first pressure gauge 14 and a second pressure gauge 15, the first pressure gauge 14 being provided on the positive circulation joint a2 to indicate the pressure in the first line 1, and the second pressure gauge 15 being provided on the side circulation joint A3 to indicate the pressure in the second line 2. Of course, the first pressure gauge 14 may also be provided on the first cross or on a portion of the first, third or fifth line communicating with the positive circulation connection a 2. A second pressure gauge 15 may also be provided on the second cross or on a portion of the second, fourth or sixth line communicating with side loop connection a 3.
In the present exemplary embodiment, the circulation switching device may further include a hydraulic console (not shown in fig. 1) connected to the first control valve 7, the second control valve 8, the third control valve 9, the fourth control valve 10, the first compensation valve 11, and the second compensation valve 12, respectively, to control the opening and closing thereof.
In a second exemplary embodiment of the present invention, the circulation switching device may further include an uninterrupted circulation joint including the shorting unit and the mobile docking unit. In addition, this incessant circulation connects still can include gate valve manifold sled body and switch board, and the gate valve manifold sled body passes through the pipeline to be connected with the rear end of side connector. For example, further, the control cabinet and the gate valve manifold prying body can be arranged in the integration box together, so that the working space is effectively saved. In addition, the endless loop joint may also include a drilling platform, some or all of which may be placed on the drilling platform.
The short circuit unit comprises an upper connector, a lower connector, a clutch device, a first inlet one-way valve and a second inlet one-way valve, the upper connector and the lower connector are rotatably connected from top to bottom, the upper connector and the lower connector are provided with hollow axial cavities, the axial cavities of the upper connector and the lower connector are mutually communicated, and a side connector which is communicated with each other is further arranged on the side wall of the upper connector. For example, the short circuit unit may further include a plurality of sets of rotation members, the number of sets of rotation members being the same as the number of the rotation grooves and corresponding one to one, each set of rotation members being capable of being mounted in the corresponding rotation groove. For example, the rotating member may include a number of steel balls, etc. For example, the shorting unit may further comprise a number of sealing members (e.g., sealing rings) mounted on the rotating shaft to effect a seal between the upper and lower connecting bodies. For example, a plurality of mounting holes can be arranged on the upper connecting body to fix different relative positions between the upper connecting body and the clutch device. For example, the upper end of the rotating shaft may be connected to a drilling tool, such as a drill rod. For example, a plurality of first annular grooves can be formed in the rotating shaft, a plurality of second annular grooves are formed in the inner wall of the upper cavity, the first annular grooves and the second annular grooves are identical in number and correspond to each other one by one, and the first annular grooves and the second annular grooves which are in corresponding relation form the rotating groove together.
The clutch device is sleeved on the upper connecting body and/or the lower connecting body and can enable the upper connecting body and the lower connecting body to keep relative rotation or synchronous rotation. The first inlet check valve is arranged in the upward opening of the upper connecting body, and the second inlet check valve is arranged in the side connecting port of the upper connecting body. For example, the clutch device may include a spline housing, a portion of the upper connecting body contacting the spline housing is a first spline shaft, a portion of the lower connecting body contacting the spline housing is a second spline shaft, the first spline shaft and the second spline shaft are both matched with the spline housing, the spline housing is capable of sliding back and forth on the first spline shaft and the second spline shaft, and the short circuit unit further includes a first fixing member (e.g., a positioning pin) capable of fixing the spline housing and the first spline shaft. For example, the upper connecting body can comprise a connecting shaft, a clutch shaft, a limiting shaft and a rotating shaft which are sequentially connected from top to bottom, wherein the upper end of the connecting shaft can be further connected with a drilling tool, the first inlet check valve is arranged in an upward opening of the connecting shaft, and the second inlet check valve is arranged on the side wall of the connecting shaft; the clutch shaft is a spline shaft, and the radial size of the clutch shaft is smaller than that of the connecting shaft; the radial size of the limiting shaft is smaller than the radial sizes of the lower end of the clutch shaft and the upper end of the rotating shaft; the lower connecting body is provided with an upper cavity and a lower cavity which are communicated up and down, the radial size of the upper cavity is larger than that of the lower cavity, and the rotating shaft can be placed in the upper cavity and is in rotating connection with the upper cavity and the lower cavity.
The movable butt joint unit comprises a side connecting mechanism, the side connecting mechanism comprises a side connector, the front end of the side connector is matched with the side connector and can be inserted into the side connector, the rear end of the side connector is provided with a port in butt joint with the drilling circulation medium pipeline, and the side connector is also provided with a hollow cavity which communicates the front end with the rear end of the side connector. For example, the mobile docking unit may further include a mobile seat on which the side connection mechanism is located. For example, the bottom of the movable seat is directly or indirectly connected with a roller, so that the movable seat can move in all directions.
In this embodiment, the side connection mechanism may further include a hollow motor, a torque limiter, and a fastening sleeve, wherein a rotation output hole of the hollow motor is maintained horizontal; the torque limiter is fixed in a rotation output hole of the hollow motor; the fastening sleeve is in adaptive connection with the inner cavity of the torque limiter; the adapter sleeve is sleeved on the lateral connecting head, and the front end of the adapter sleeve is positioned outside the hollow motor. Here, that is, the torque limiter is connected to the rotation output hole of the hollow motor in a fitting manner, and the rotation of the hollow motor can rotate the torque limiter. Here, for example, the distal end of the tightening sleeve can be fitted to the side connection port and screwed into the side connection port. For example, the front end of the fastening sleeve is provided with an external thread matched with the side connecting port. For example, the tightness degree of the fit between the tightening sleeve and the tightening sleeve can be controlled through the torque limiter, when the output torque exceeds the highest output torque of the torque limiter, the inner ring of the tightening sleeve slips, the mechanical transmission efficiency is reduced, and the tightening sleeve gradually stops rotating. Here, when the torque limiter drives the fastening sleeve to rotate, the side connector is not affected or is slightly affected, and can remain substantially stationary. Here, through the adaptation of cavity motor, adapter sleeve and side connector, simplified the butt joint flow of side circulation pipeline greatly, reduced operating personnel's quantity, show promotion work efficiency. For example, the side connecting mechanism may further include a rotating table and a lifting structure, wherein the rotating table can rotate on a horizontal plane, and a hollow motor is fixed on a table top of the rotating table; the lifting structure is positioned between the rotating platform and the moving seat and can adjust the vertical distance between the rotating platform and the moving seat. For example, the lifting device may be a threaded screw structure, one end of the screw is movably connected to the rotating platform, and the other end of the screw is adapted to a threaded hole configured on the moving base, so as to lift the rotating platform.
In this embodiment, remove butt joint unit and short circuit unit's butt joint accessible hollow motor and drive the adapter sleeve screw in, show to have promoted work efficiency. Meanwhile, the alignment of the height and the angle can be realized by matching the rotating table and the lifting structure, the butt joint procedure is effectively simplified, the consumed time is short, and the efficiency is high.
In this embodiment, the positive circulation joint is connected to the first inlet check valve through a pipeline, and the side circulation joint is connected to the second inlet check valve through a pipeline.
FIG. 2 shows a schematic of a structure of an uninterrupted circulation joint according to an exemplary embodiment of the present invention; FIG. 3 shows a schematic diagram of a shorting cell of the present invention; figure 4 shows an assembly schematic of the shorting unit of the present invention; FIG. 5 shows a partial enlarged view at A in FIG. 2; FIG. 6 shows a schematic structural view of a first lateral connector of the present invention; fig. 7 shows a schematic view of the second lateral side joint of the present invention. The following embodiments will be described in detail with reference to FIGS. 2-7.
As shown in fig. 2, in the present exemplary embodiment, the continuous circulation drilling system in which the drilling tool is rotatable includes a short circuit unit, a mobile docking unit, a control cabinet 50, a gate valve manifold pry 60, an integration box 70, and a pipe 80. The control cabinet 50 and the gate valve manifold pry 60 are located inside the integrated box 70.
As shown in fig. 3 and 4, the short circuit unit includes an upper connector 16, a lower connector 17, a clutch 18, a first inlet check valve 191 and a second inlet check valve 192, and axial cavities of the upper connector 16 and the lower connector 17 are communicated with each other. The upper connecting body 16 includes, from top to bottom: a connecting shaft 161, a clutch shaft 162, a limit shaft 163 and a rotating shaft 164. A lateral connection port 1611 is also formed in the wall of the connection shaft 161. The upper end of the rotating shaft 164 may be connected to a drilling tool, such as a drill rod. The clutch shaft 162 may be a spline shaft, and the clutch shaft 162 may be adapted to the clutch device 18. The outer diameter of the clutch shaft 162 may be smaller than the outer diameter of the connecting shaft 161, the limiting shaft 163 may be sleeved with a limiting sleeve 1631, and the outer diameter of the limiting shaft 163 may be smaller than the outer diameter of the clutch shaft 162 and the outer diameter of the rotating shaft 164.
The lower connecting body 17 may have an upper cavity 171 and a lower cavity 172 communicating with each other, and the radial dimension of the lower cavity 172 is smaller than that of the upper cavity 171. The portion of the lower connecting body 17 contacting the clutch device 18 may be a spline shaft.
The clutch device 18 is sleeved on the upper connecting body 16 and the lower connecting body 17, so that the upper connecting body 16 and the lower connecting body 17 can keep synchronous rotation. The clutch device 18 is disposed on the upper connecting body 16 to maintain the relative rotation between the upper connecting body 16 and the lower connecting body 17. The clutch device 18 may include a splined hub, and varying the state of the clutch device 18 enables different modes of rotation.
The first inlet check valve 191 and the second inlet check valve 192 may be installed at different positions on the upper connection body 16; the first inlet check valve 191 may be installed in an opening above the axial cavity of the upper connecting body 16, and the second inlet check valve 192 may be installed in the side connection port 1611.
The outer wall of the rotating shaft is provided with a plurality of first annular grooves, the inner wall of the upper cavity of the lower connecting body can be provided with a plurality of second annular grooves, the two annular grooves are equal in number and correspond to each other one by one, and the rotating groove is formed by two annular grooves which correspond to each other. A plurality of sealing members 21 may be installed on the rotating shaft to achieve sealing between the upper and lower coupling bodies. The seal 21 may comprise a sealing ring.
The short circuit unit may further comprise a plurality of sets of rotatable members 20, the number of rotatable members 20 being equal to the number of rotatable slots in each of which a set of rotatable members 20 is mounted. The rotational member 20 may include a number of steel balls, ball bearings, or the like.
The lower connection body is further provided with a plurality of rotation member mounting holes 173 and a plurality of blocking pins 174. The number of the rotating member mounting holes 173 is the same as the number of the second annular grooves, and the rotating member mounting holes 173 are in one-to-one correspondence with the second annular grooves, each rotating member mounting hole 173 is communicated with the corresponding second annular groove, the number of the blocking pins 174 is the same as the number of the rotating member mounting holes 173, and the blocking pins 174 can block the corresponding rotating member mounting holes 173.
The limiting sleeve 1631 may be a double-layer structure, and may include a graphite bearing sleeve and a shell from inside to outside, both of which are fixedly connected, and the shell is fixedly connected with the lower connector.
The upper connecting body can be provided with a plurality of mounting holes so as to realize the fixation of different relative positions between the upper connecting body and the clutch device. The upper connecting body 16 and the clutch device 18 can be connected by a first fixing member 221. The position-limiting sleeve 1631 can be fixed on the lower connecting body 17 by the second fixing member 222. Each of the first and second fixtures 221 and 222 may include a bolt, a screw, a set pin, and the like.
As shown in fig. 2, 5, 6 and 7, the mobile docking unit includes a roller 23, a leg 24, a mobile seat 25 and a side connection mechanism, which are sequentially arranged from bottom to top. The bottom of the movable seat 25 is fixedly connected with a roller 23 through a support leg 24, and the roller 23 is a movable roller and can move in all directions without dead angles.
The side connection mechanism includes a hollow motor 401, a torque limiter 402, a fastening sleeve 403, a side connection head 404, a rotation table 405, and a lifting structure 406. The lifting structure 406 is a threaded screw structure, a thread adapted to the screw is disposed on the movable base 25, and a counter bore is disposed at the center of the bottom of the rotary table 405, so that the rotary table 405 is movably connected to the screw. The rotary table 405 is placed on the screw of the lifting structure 406 so that it can rotate freely around the screw. The hollow motor 401 is fixedly connected to the rotary table 405, and the torque limiter 402 is coaxial with the hollow motor 401 and connected to an output hole of the hollow motor 401. The fastening sleeve 403 is adapted to the inner cavity of the torque limiter 402, and has an external thread at the right end for abutting against the short circuit unit. The hollow side connector 404 is sleeved in the inner cavity of the fastening sleeve 403, and the left end of the hollow side connector has a port for butting with the pipeline 80.
And the positive circulation joint is connected with the first inlet one-way valve through a pipeline, and the side circulation joint is connected with the second inlet one-way valve through a pipeline, so that the circulation switching operation can be carried out.
In the present exemplary embodiment, the method of using an uninterrupted circulation joint comprises the steps of:
when the drilling circulating medium enters the drilling circulating medium from the first inlet one-way valve, the spline sleeve is matched with the upper connector and the lower connector, the upper connector and the lower connector synchronously rotate, and the drilling circulating medium enters the drilling circulating medium from the first inlet one-way valve;
when the drill rod needs to be disassembled and assembled, the drill rod is made up and broken off, and the drill rod is lifted and lowered, the rotation of the drill rod is stopped. The mobile docking unit which is already installed is pushed to be close to the short-circuit unit, the height of the rotating table is adjusted through the lifting structure, and the angle is adjusted by utilizing the rotation of the rotating table, so that the side connecting head is aligned to the side connecting port. And starting the hollow motor, and butting the hollow motor with the side connecting port through the external thread of the fastening sleeve. When the torque force reaches the maximum torque stress of the torque force limiter, the fastening sleeve gradually stops screwing in to complete butt joint, so that drilling circulating media enter from the second inlet one-way valve, and the drilling circulating media entering from the first inlet one-way valve are closed.
And moving the spline housing in the direction away from the lower connector, meshing the spline housing with the clutch shaft of the upper connector only, and fixing the spline housing at the position on the upper connector by using the positioning nail. The slips is seated on the drill rod, the drill rod is driven to rotate by the rotary table, the upper connector and the lower connector can rotate mutually due to the clutch state of the upper connector and the lower connector, the drill string in the well can rotate under the driving of the rotary table, and meanwhile, drilling media can also normally circulate. Under the condition that the drill rod needs to be disassembled and assembled, the drill rod connected with the upper connecting body is directly disassembled, or the drill rod is connected with the upper connecting body.
When the carousel drives the drilling rod rotatory, it needs fixed with the fixed bolster to go up the connector, and the fixed bolster can be designed for the support of V type iron formula, fixed set up on the supporting seat one with last connector excircle assorted V type support to set up on the V type support one with the V type support the V type apron of looks lock, the V type supports one end and is articulated mutually with V type apron, the V type supports the other end and sets up the screw, can dismantle with V type apron through the screw and be connected.
The invention also provides a circulation switching method for dry gas and atomized continuous circulation well drilling.
In a third exemplary embodiment of the present invention, the cycle switching method of dry gas and atomized continuous cycle drilling may be implemented by the cycle switching device of dry gas and atomized continuous cycle drilling of the first exemplary embodiment described above, and the method includes the steps of:
the positive cycle process: and opening the first control valve, closing the second control valve, the third control valve, the fourth control valve, the first compensation valve and the second compensation valve, and allowing the medium fluid to enter from the circulating medium inlet and flow out from the positive circulation joint through the first pipeline. Specifically, as shown in fig. 1, when the normal cycle is performed, the first control valve 7 is opened, and the second control valve 8, the third control valve 9, the fourth control valve 10, the first compensation valve 11, and the second compensation valve 12 are closed, so that the circulating medium such as the dry gas and the atomizing gas flows in from the circulating medium inlet a1, passes through the first line 1, and flows out from the port a2 of the normal cycle connector into the riser.
Side circulation process: and opening the second control valve, closing the first control valve, the third control valve, the fourth control valve, the first compensation valve and the second compensation valve, and allowing the medium fluid to enter from the circulating medium inlet and flow out from the side circulating joint through the second pipeline. Specifically, as shown in fig. 1, when the side circulation is performed, the second control valve 8 is opened, the first control valve 7, the third control valve 9, the fourth control valve 10, the first compensation valve 11, and the second compensation valve 12 are closed, and the circulation medium such as the dry gas and the atomizing gas flows in from the circulation medium inlet a1, passes through the second line 2, and flows out from the outlet of the side circulation joint A3.
The positive cycle changes the side cycle process: after the side circulation pipeline is connected, opening the pressure compensation pump, opening the second compensation valve, pumping circulation media into the second pipeline until the second pipeline and the side circulation pipeline are filled with the circulation media and the pressure in the second pipeline rises to be close to the pressure in the first pipeline, opening the second control valve, closing the pressure compensation pump and the second compensation valve, and establishing a side circulation channel; and closing the first control valve to cut off the positive circulation channel, opening the third control valve to release pressure, and closing the third control valve after pressure release to finish the operation of positive circulation side-to-side circulation. For example, the pressure compensation range of the pressure compensation pump can be 0-15 MPa. Specifically, as shown in fig. 1, after connecting one end of the side circulation line to the side circulation joint a3 and the other end to the drill floor side circulation interface (for example, the second control valve of the uninterrupted circulation short-circuit device), the pressure compensation pump 13 and the first compensation valve 11 are opened, the second line 2 and the side circulation hose are pumped to be full, the pressure value of the first line 1 (i.e., the reading of the first pressure gauge 14) and the pressure value of the second line 2 (i.e., the reading of the second pressure gauge 15) are observed during pumping, and when the pressure in the second line 2 rises to be close to the pressure in the first line 1, the second control valve 8 is opened, the pressure compensation pump 13 and the second compensation valve 12 are closed, and a side circulation channel is established. For example, the second in-line pressure may rise to approximately the first in-line pressure at 95% or more of the first in-line pressure. Here, the opening degree of the second compensation valve 12 is decreased as the pressure value ratio difference of the first pressure gauge and the second pressure gauge is decreased. The relationship between the opening degree during the closing of the second compensating valve and the pressure ratio difference between the first and second lines is given in table 1.
TABLE 1 relationship between second compensating valve opening and first and second line pressure ratio differences
After the second compensation valve 12 is completely closed, the first control valve 7 is closed, and the third control valve 9 is opened to form a pressure relief passage, so that the pressure in the forward circulation pipeline is relieved. Here, the opening process of the third control valve 9 may be as shown in table 2. When the pressure in the first line 1 has dropped to zero 10s, the third control valve 9 is closed. At this time, the circulating medium enters the switching device from the inlet of the circulating medium A1, enters the continuous circulating valve from the outlet of the circulating direction of the side A3, enters the water hole of the drilling tool, and the circulation of the positive circulating side is completed.
TABLE 2 third control valve opening versus first in-line pressure drop ratio
| First line pressure drop ratio (%) | Opening degree of third control valve |
| P≤5 | 10％ |
| 5＜P≤25 | 25％ |
| 25＜P≤50 | 30％ |
| 50＜P≤75 | 50％ |
| 75＜P≤100 | 100％ |
The side circulation to positive circulation process: after the positive circulation pipeline is connected, opening a pressure compensation pump, opening a first compensation valve, pumping circulation media into the first pipeline until the first pipeline and the positive circulation pipeline are filled with the circulation media and the pressure in the first pipeline rises to be close to the pressure in the second pipeline, opening a first control valve, closing the pressure compensation pump and the first compensation valve, and establishing a positive circulation channel; and closing the second control valve to cut off the side circulation channel, opening the fourth control valve to release pressure, and closing the fourth control valve after pressure release to finish the operation of side circulation to positive circulation. Here, the first in-line pressure may rise to approximately the second in-line pressure, which may be greater than or equal to 95% of the first in-line pressure. Specifically, as shown in fig. 1, after the connection of the positive circulation line (tap, single) to the positive circulation joint a2 at the drill floor is completed, the pressure compensating pump 13 is opened, the first compensating valve 11 is opened, and when the pressure of the first line rises to be close to 95% or more of the pressure of the second line, the pressure compensating pump 13 is closed, the first compensating valve 11 is closed, and the first control valve 7 is opened to establish a positive circulation path. The relationship between the opening during the closing of the first compensation valve and the pressure ratio difference between the second and the first line is given in table 3. By controlling the ratio of the second to first line pressure, the range of pressure fluctuations is minimized during the switching cycle.
TABLE 3 relationship between the first compensating valve opening and the second and first line pressure ratio difference
After the first compensation valve 11 is closed, the second control valve 8 is closed. The fourth control valve 10 is opened to form a pressure relief path to relieve the pressure in the second pipeline 2. Here, the opening process of the fourth control valve 10 may be as shown in table 4. When the pressure in the second line 2 has dropped to zero for 10s, the fourth control valve 10 is closed. At the moment, the circulating medium enters the switching device from the inlet of the circulating medium A1, enters the continuous circulating valve from the outlet of the positive circulating direction A2, enters the water hole of the drilling tool, and the side circulation and the positive circulation are completed.
TABLE 4 fourth control valve opening versus second in-line pressure drop ratio
| Second line pressure drop ratio (%) | Fourth control valve closing opening degree |
| P≤5 | 10％ |
| 5＜P≤25 | 25％ |
| 25＜P≤50 | 30％ |
| 50＜P≤75 | 50％ |
| 75＜P≤100 | 100％ |
In the present exemplary embodiment, the circulating medium may include at least one of a dry gas, an atomizing gas, a foam, and a slurry.
In the exemplary embodiment, the pressure fluctuation range of the positive cycle to side cycle or side cycle to positive cycle may be 0-0.5 Mpa. The pressure fluctuation range of the conventional circulation switching device for performing the positive circulation to side circulation or side circulation to positive circulation is usually 3-10 Mpa, while the pressure fluctuation range of the conventional circulation switching device for performing the positive circulation to side circulation or side circulation to positive circulation is only 0-0.5 Mpa, so that the pressure fluctuation range is obviously reduced, and the probability of complex conditions occurring underground is greatly reduced.
In summary, the advantages of the circulation switching device and switching method for dry gas and atomized continuous circulation drilling according to the present invention include: the invention provides a circulation mode switching device for dry gas and atomization continuous circulation drilling, which is simple in structure and convenient to manufacture and maintain. In the continuous circulation drilling process, the circulation medium is ensured not to be interrupted, the problem of large pressure fluctuation in the switching process is solved, and the underground complex condition caused by circulation interruption and large pressure fluctuation is avoided.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A circulation switching device for dry gas and atomization continuous circulation drilling is characterized by comprising a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, a first control valve, a second control valve, a third control valve, a fourth control valve, a first compensation valve, a second compensation valve, a pressure compensation pump, a circulation medium inlet, a positive circulation joint, a side circulation joint and a pressure relief joint, wherein the first compensation valve, the second compensation valve, the pressure compensation pump, the circulation medium inlet, the positive circulation joint, the side circulation joint and the pressure relief joint are arranged on the same side of a drill pipe,
one end of the first pipeline is connected with the circulating medium inlet, and the other end of the first pipeline is connected with the positive circulating joint;
one end of the second pipeline is connected with the circulating medium inlet, and the other end of the second pipeline is connected with the side circulating joint;
one end of the third pipeline is connected with the positive circulation joint, and the other end of the third pipeline is connected with the pressure relief joint;
one end of the fourth pipeline is connected with the side circulation joint, and the other end of the fourth pipeline is connected with the pressure relief joint;
the first control valve is arranged on a first pipeline, the second control valve is arranged on a second pipeline, the third control valve is arranged on a third pipeline, and the fourth control valve is arranged on a fourth pipeline;
the pressure compensation pump is connected with the positive circulation joint through a fifth pipeline, and is also connected with the side circulation joint through a sixth pipeline;
the first makeup valve is disposed on a fifth line and the second makeup valve is disposed on a sixth line.
2. The circulation switching device for dry gas and atomized continuous circulation drilling according to claim 1, characterized in that the circulation switching device further comprises a first pressure gauge arranged on the positive circulation joint to display the pressure in the first line and a second pressure gauge arranged on the side circulation joint to display the pressure in the second line.
3. The cyclic switching apparatus of dry gas and atomized continuous cycle drilling as claimed in claim 1, wherein the first and second control valves are plate gate valves, the third and fourth control valves are choke valves, and the first and second compensation valves are choke valves.
4. The circulation switching device for dry gas and atomized continuous circulation drilling according to claim 1, characterized in that it further comprises a hydraulic control console connected to the first control valve, the second control valve, the third control valve, the fourth control valve, the first compensation valve and the second compensation valve, respectively, to control the opening and closing thereof.
5. The cyclic switching apparatus of dry gas and atomized continuous cycle drilling according to claim 1, wherein the cyclic switching apparatus further comprises an uninterrupted cycle sub comprising a short circuit unit and a mobile docking unit, wherein,
the short circuit unit comprises an upper connector, a lower connector, a clutch device, a first inlet one-way valve and a second inlet one-way valve, the upper connector and the lower connector are rotatably connected from top to bottom and are provided with hollow axial cavities, the axial cavities of the upper connector and the lower connector are mutually communicated, and the side wall of the upper connector is also provided with a through side connecting port; the clutch device is sleeved on the upper connecting body and/or the lower connecting body and can enable the upper connecting body and the lower connecting body to keep relative rotation or synchronous rotation; the first inlet one-way valve is arranged in the upward opening of the upper connecting body, and the second inlet one-way valve is arranged in the side connecting opening of the upper connecting body;
the movable butt joint unit comprises a side connecting mechanism, the side connecting mechanism comprises a side connector, the front end of the side connector is matched with the side connector and can be inserted into the side connector, the rear end of the side connector is provided with a port in butt joint with the drilling circulating medium pipeline, and the side connector is also provided with a hollow cavity for communicating the front end with the rear end;
the positive circulation joint is connected with the first inlet one-way valve through a pipeline, and the side circulation joint is connected with the second inlet one-way valve through a pipeline.
6. The cyclic switching apparatus of dry gas and atomized continuous cycle drilling according to claim 5, wherein the mobile docking unit further comprises a mobile seat on which the side connection mechanism is located;
the side connecting mechanism comprises a hollow motor and a fastening sleeve, wherein a rotary output hole of the hollow motor is kept horizontal, the fastening sleeve is fixed in the rotary output hole of the hollow motor, the fastening sleeve is sleeved on the side connecting head, and the front end of the fastening sleeve is positioned outside the hollow motor.
7. The circulation switching apparatus for dry gas and atomized continuous circulation drilling according to claim 6, wherein the side connection mechanism further comprises a torque limiter, a rotary table and a lifting structure,
the torque limiter is fixed in a rotation output hole of the hollow motor, the fastening sleeve is in adaptive connection with an inner cavity of the torque limiter, the fastening sleeve is sleeved on the side connecting head, and the front end of the fastening sleeve is positioned outside the hollow motor;
the front end of the fastening sleeve is matched with the side connecting port and can be screwed into the side connecting port;
the rotating platform can rotate on the horizontal plane, and the hollow motor is fixed on the table top of the rotating platform; the lifting structure is located the revolving stage with remove between the seat to can adjust the revolving stage with remove the vertical distance between the seat.
8. The circulation switching device for dry gas and atomized continuous circulation drilling according to claim 5, wherein the clutch device comprises a spline housing, the part of the upper connector, which is in contact with the spline housing, is a first spline shaft, the part of the lower connector, which is in contact with the spline housing, is a second spline shaft, the first spline shaft and the second spline shaft are both matched with the spline housing, the spline housing can slide back and forth on the first spline shaft and the second spline shaft, and the short circuit unit further comprises a first fixing member which can fix the spline housing and the first spline shaft;
the upper connecting body comprises a connecting shaft, a clutch shaft, a limiting shaft and a rotating shaft which are sequentially connected from top to bottom, wherein,
the upper end of the connecting shaft can be further connected with a drilling tool, the first inlet one-way valve is installed in an upward opening of the connecting shaft, and the second inlet one-way valve is installed on the side wall of the connecting shaft;
the clutch shaft is a spline shaft, and the radial size of the clutch shaft is smaller than that of the connecting shaft;
the radial size of the limiting shaft is smaller than the radial sizes of the lower end of the clutch shaft and the upper end of the rotating shaft;
the lower connecting body is provided with an upper cavity and a lower cavity which are communicated up and down, the radial size of the upper cavity is larger than that of the lower cavity, and the rotating shaft can be placed in the upper cavity and is rotationally connected with the upper cavity and the lower cavity.
9. A method of cyclic switching of dry gas and atomised continuous cycle drilling, characterised in that the method is implemented by a cyclic switching apparatus of dry gas and atomised continuous cycle drilling according to any of claims 1 to 8, and the method comprises the steps of:
the positive cycle process: opening the first control valve, closing the second control valve, the third control valve, the fourth control valve, the first compensation valve and the second compensation valve, and allowing the medium fluid to enter from the circulating medium inlet and flow out from the positive circulation joint through the first pipeline;
side circulation process: opening a second control valve, closing the first control valve, the third control valve, the fourth control valve, the first compensation valve and the second compensation valve, and allowing the medium fluid to enter from the circulating medium inlet and flow out from the side circulating joint through a second pipeline;
the positive cycle changes the side cycle process: after the side circulation pipeline is connected, opening a pressure compensation pump, opening a second compensation valve, pumping circulation media into the second pipeline until the second pipeline and the side circulation pipeline are filled with the circulation media and the pressure in the second pipeline rises to be close to the pressure in the first pipeline, opening a second control valve, closing the pressure compensation pump and the second compensation valve, and establishing a side circulation channel;
closing the first control valve to cut off the positive circulation channel, opening the third control valve to release pressure, and closing the third control valve after pressure release to finish the operation of positive circulation side-turning circulation;
the side circulation to positive circulation process: after the positive circulation pipeline is connected, opening a pressure compensation pump, opening a first compensation valve, pumping circulation media into the first pipeline until the first pipeline and the positive circulation pipeline are filled with the circulation media and the pressure in the first pipeline rises to be close to the pressure in the second pipeline, opening a first control valve, closing the pressure compensation pump and the first compensation valve, and establishing a positive circulation channel; and closing the second control valve to cut off the side circulation channel, opening the fourth control valve to release pressure, and closing the fourth control valve after pressure release to finish the operation of side circulation to positive circulation.
10. The cyclic switching method of dry gas and atomized continuous cycle drilling according to claim 9, wherein the pressure compensation range of the pressure compensation pump is 0-15 Mpa.
11. The cyclic shift method of dry gas and atomizing continuous cycle drilling as claimed in claim 9, wherein the second in-line pressure rises to approximately the first in-line pressure at a second in-line pressure of 95% or more of the first in-line pressure.
12. The cyclic shift method of dry gas and atomizing continuous cycle drilling as claimed in claim 9, wherein the pressure in the first pipeline rises to near the pressure in the second pipeline, which is greater than or equal to 95% of the pressure in the first pipeline.
13. The cyclic switching method of dry gas and atomized continuous cycle drilling according to claim 9, wherein the pressure fluctuation range of the positive cycle to side cycle or side cycle to positive cycle is 0-0.5 Mpa.
14. The cyclic shift method of dry gas and atomized continuous cycle drilling according to claim 9, wherein opening the third control valve to relieve pressure and closing the third control valve after relieving pressure comprises closing the third control valve after the first line pressure drops to zero 10 s.
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| CN202110805034.8A CN114622852A (en) | 2021-07-16 | 2021-07-16 | Circulation switching device and method for dry gas and atomized continuous circulation drilling |
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| CN202110805034.8A CN114622852A (en) | 2021-07-16 | 2021-07-16 | Circulation switching device and method for dry gas and atomized continuous circulation drilling |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1585506A1 (en) * | 1987-11-16 | 1990-08-15 | Кольская комплексная геологоразведочная экспедиция сверхглубокого бурения | Arrangement for measuring and transmitting data on hole bottom motor revolutions and axial bit load |
| US20120261138A1 (en) * | 2011-04-12 | 2012-10-18 | Saudi Arabian Oil Company | Circulation and rotation tool |
| CN203626662U (en) * | 2013-12-28 | 2014-06-04 | 中国石油集团渤海钻探工程有限公司 | Gas-liquid dual-purpose continuous circulation drilling distribution manifold |
| CN206942698U (en) * | 2017-05-24 | 2018-01-30 | 四川中京新能源科技有限公司 | A kind of petroleum machinery drill pipe tong |
-
2021
- 2021-07-16 CN CN202110805034.8A patent/CN114622852A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1585506A1 (en) * | 1987-11-16 | 1990-08-15 | Кольская комплексная геологоразведочная экспедиция сверхглубокого бурения | Arrangement for measuring and transmitting data on hole bottom motor revolutions and axial bit load |
| US20120261138A1 (en) * | 2011-04-12 | 2012-10-18 | Saudi Arabian Oil Company | Circulation and rotation tool |
| CN203626662U (en) * | 2013-12-28 | 2014-06-04 | 中国石油集团渤海钻探工程有限公司 | Gas-liquid dual-purpose continuous circulation drilling distribution manifold |
| CN206942698U (en) * | 2017-05-24 | 2018-01-30 | 四川中京新能源科技有限公司 | A kind of petroleum machinery drill pipe tong |
Non-Patent Citations (1)
| Title |
|---|
| 董仕明;: "阀式连续循环气体钻井技术的研究与应用", 钻采工艺, no. 04 * |
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