CN110700756A - Casing drilling device for downhole power drilling tool - Google Patents
Casing drilling device for downhole power drilling tool Download PDFInfo
- Publication number
- CN110700756A CN110700756A CN201911086173.9A CN201911086173A CN110700756A CN 110700756 A CN110700756 A CN 110700756A CN 201911086173 A CN201911086173 A CN 201911086173A CN 110700756 A CN110700756 A CN 110700756A
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- China
- Prior art keywords
- rotor
- drilling tool
- drilling
- drill bit
- oil cavity
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- Pending
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- 238000005553 drilling Methods 0.000 title claims abstract description 91
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 239000000725 suspension Substances 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 230000000903 blocking effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C2/00—Rotary-piston engines
- F03C2/08—Rotary-piston engines of intermeshing-engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The utility model provides a formula sleeve pipe drilling equipment is salvaged to power drill in pit, relates to sleeve pipe drilling technical field, including top connection, connector, gripper seat, sealing piston, sealing head, cylinder body, clamping piston, top connection, connector and gripper seat loop through threaded connection from top to bottom, clamping piston movable mounting in the annular space between connector and cylinder body, the inboard on cylinder body upper portion is provided with the oil cavity, the connector outer cylinder encloses into oil cavity down with the cylinder body inner surface, is provided with the check valve between oil cavity and the oil cavity down, the switch-on direction of check valve is by last to down, still is provided with the relief valve between oil cavity and the oil cavity down, the outside cover of gripper seat has reset spring. Through adopting foretell technical scheme, the action of accessible bit leg "grabbing" is grabbed the casing coupling and is grabbed and transmit the moment of torsion to the sleeve pipe, simultaneously with the shutoff of sleeve pipe inner hole, compares with current casing coupling head, and nearly not damaged after frequent use, therefore life is longer.
Description
Technical Field
The invention belongs to the technical field of casing drilling, and particularly relates to a throwing and fishing type casing drilling device for an underground power drilling tool.
Background
Casing drilling refers to an advanced drilling mode in which a casing is directly used for replacing a drill rod to transmit mechanical and hydraulic energy downwards in the drilling process, and the casing is directly left in a through-barrel after drilling is finished to complete the well. The drilling mode can reduce the problems of tripping, blocking, drilling closing and the like, and reduce the drilling cost. When the casing is drilled and the well is completed, the drilling tool can only be permanently left in the well and can not be taken out.
The downhole power drilling tool is a bottom hole drilling tool capable of converting the energy of drilling fluid into drilling and rock breaking power, such as a turbine drilling tool, a single-screw drilling tool, an electric drilling tool and the like. However, the downhole motor is expensive to manufacture, and when the casing drilling process is used, the downhole motor will cause unnecessary economic loss if left in the well. Therefore, there is a need to design a new drilling device to solve the above problems.
Disclosure of Invention
The invention provides a throwing and fishing type casing drilling device of an underground power drilling tool, which aims to solve the problems in the background technology.
The technical problem solved by the invention is realized by adopting the following technical scheme: the invention provides a downhole power drilling tool throwing and fishing type casing drilling device, which comprises a downhole power drilling tool and a drill bit, wherein the downhole power drilling tool comprises a drilling tool stator and a drilling tool rotor, the drilling tool rotor is arranged in the drilling tool stator, the drill bit is connected to the lower end of the drilling tool rotor, the drilling tool stator rotates under the action of drilling fluid flow so as to drive the drill bit to rotate, the downhole power drilling tool is inserted into a barrel, the downhole power drilling tool is inserted from the upper end of the barrel and is connected with the barrel in an anti-rotation manner through a spline connection structure, and the upper end of the barrel is connected to the lower end of a casing pipe column;
the drill bit suspension assembly is connected to the lower end of the cylinder body, the drill bit suspension assembly structurally comprises an installation sleeve and a suspension rotor, the upper end of the installation sleeve is connected to the lower end of the cylinder body through threads, the suspension rotor is installed in the installation sleeve and can freely rotate in the installation sleeve, the lower end of the drilling tool rotor is connected with the upper end of the suspension rotor through a spline, and the lower end of the suspension rotor is connected with the drill bit through threads.
The connecting threads between the cylinder and the mounting sleeve and between the suspension rotor and the drill bit are TBG threads, and a conical surface sealing structure is arranged at the connecting part between the drilling tool rotor and the suspension rotor. And a thrust bearing is clamped between the lower end surface of the mounting sleeve and the upper end surface of the drill bit.
By adopting the drilling device, the underground power drilling tool can be taken out in a salvaging way, thereby two remarkable technical effects can be generated:
firstly, when drilling, the underground working condition is complex, so that the underground power drilling tool is easy to have the problems of mechanical damage, blocking and the like, and the underground power drilling tool is failed.
And secondly, when the well is completed, the underground power tool is taken out in a salvaging mode, so that the underground power tool can be recycled, and unnecessary economic loss caused by leaving the underground power drilling tool underground is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the downhole motor being a single screw drill;
FIG. 3 is a schematic view of the downhole motor being a turbine;
FIG. 4 is an enlarged schematic view of a pair of stationary and moving impellers of FIG. 3 downhole.
In the figure, 1-cylinder, 2-stator of drilling tool, 3-rotor of drilling tool, 4-spline, 5-mounting sleeve, 6-thrust bearing, 7-suspension rotor, 8-drill bit, 9-conical sealing structure, 10-screw, 11-liquid passing hole, 12-fixed impeller, 13-movable impeller, 14-spiral groove, 15-central flow passage and 16-inclined blade.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the present embodiment comprises a downhole motor comprising a stator 2 and a rotor 3, the rotor 3 being mounted inside the stator 2, and a drill bit 8 being connected to the lower end of the rotor 3, the stator 2 being rotated by a flow of drilling fluid, thereby driving the drill bit 8 in rotation. The above is a common structure in the prior art, and is not described herein again.
The underground power drilling tool is inserted into one cylinder body 1, and is inserted from the upper end of the cylinder body 1, and when the underground power drilling tool is taken out, the fishing tool is used for grabbing the upper end of the underground power drilling tool, so that the underground power drilling tool can be hoisted and transported to the ground.
By adopting the drilling device, the underground power drilling tool can be taken out in a salvaging way, thereby two remarkable technical effects can be generated: firstly, when drilling, the underground working condition is complex, so that the underground power drilling tool is easy to have the problems of mechanical damage, blocking and the like, and the underground power drilling tool is failed. And secondly, when the well is completed, the underground power tool is taken out in a salvaging mode, so that the underground power tool can be recycled, and unnecessary economic loss caused by leaving the underground power drilling tool underground is avoided.
The outer side of the underground power drilling tool is connected with the barrel body 1 in an anti-rotation mode through the spline 4, and therefore the underground power drilling tool and the casing pipe column are prevented from rotating relatively.
The lower end of the cylinder body 1 is connected with a drill bit suspension assembly which is used for connecting the drill bit 8 and the cylinder body 1 into a whole and enabling the drill bit 8 to freely rotate relative to the cylinder body 1. The specific structure of drill bit suspension assembly does: including installation cover 5 and suspension rotor 7, threaded connection is passed through at the lower extreme of barrel 1 in the upper end of installation cover 5, and suspension rotor 7 installs in installation cover 5 and can freely rotate in installation cover 5, the lower extreme of drilling tool rotor 3 passes through spline 4 and is connected with the upper end of suspension rotor 7, and the lower extreme of suspension rotor 7 passes through threaded connection with drill bit 8.
The connecting threads between the cylinder body 1 and the mounting sleeve 5 and between the suspension rotor 7 and the drill bit 8 are TBG threads (namely national standard petroleum pipe threads), and the threads have connecting and sealing functions and can effectively reduce the leakage of drilling fluid. The conical surface sealing structure 9 is arranged at the joint between the drilling tool rotor 3 and the suspension rotor 7, so that the leakage of drilling fluid can be further reduced. It should be noted that the conical sealing structure 9 is a sealing structure that is common in many fields such as valves, and is not described herein again.
A thrust bearing 6 is clamped between the lower end face of the mounting sleeve 5 and the upper end face of the drill bit 8, so that the drill bit 8 can rotate more smoothly.
The underground power drilling tool is a single-screw drilling tool. The single screw drill may adopt a structure as shown in fig. 2. As shown in fig. 2, in the single screw drill, the drill rotor 3 is a screw 10, the drill stator is provided with a spiral groove 14 corresponding to the screw 10, the pitch of the spiral groove 14 is the same as that of the screw 10, and during drilling, drilling fluid flows along the space between the screw 10 and the spiral groove 14 from top to bottom, so that the spiral groove 14 is driven to rotate. After reaching the lower end of the screw 10, the drilling fluid enters the central flow passage 15 through the fluid passing hole 11 and finally flows out from the bottom end of the drill bit 8.
The downhole power drill is a turbine drill. The turbodrill may adopt a structure as shown in fig. 3. As shown in fig. 3, in the turbo drill, a stator impeller 12 is fixed to a drill stator 2, a rotor impeller 13 is fixed to a drill rotor 3, and the stator impeller 12 and the rotor impeller 13 are alternately arranged in a line from top to bottom, which is advantageous for increasing torque output. The fixed impeller 12 and the movable impeller 13 are respectively provided with an inclined blade 16 which corresponds up and down, during drilling, drilling fluid sequentially and alternately passes through the fixed impeller 12 and the movable impeller 13 from top to bottom, the movable impeller 13 generates a rotating torque under the action of liquid flow impact force, and after reaching the lower end of the drilling tool rotor 3, the drilling fluid enters the central flow channel 15 through the liquid passing hole 11 and finally flows out from the bottom end of the drill bit 8.
Claims (3)
1. The utility model provides a formula sleeve pipe drilling equipment is salvaged to power drill in pit, includes power drill in the pit and drill bit (8), and power drill in the pit includes drilling tool stator (2) and drilling tool rotor (3), and inside drilling tool stator (2) were installed in drilling tool rotor (3), and the lower extreme at drilling tool rotor (3) is connected in drill bit (8), and drilling tool stator (2) are rotatory under the effect of drilling fluid stream to drive drill bit (8) rotation, its characterized in that: the underground power drilling tool is inserted into one cylinder (1), the underground power drilling tool is inserted from the upper end of the cylinder (1) and is connected with the cylinder (1) in an anti-rotation mode through a spline (4), and the upper end of the cylinder (1) is connected with the lower end of a casing pipe column;
the lower extreme of barrel (1) is connected with the drill bit and hangs the assembly, and the structure that the drill bit hung the assembly includes installation cover (5) and hangs rotor (7), and threaded connection is passed through at the lower extreme of barrel (1) in the upper end of installation cover (5), hangs rotor (7) and installs in installation cover (5) and can freely rotate in installation cover (5), the lower extreme of drilling tool rotor (3) passes through spline (4) and hangs the upper end of rotor (7) and be connected, and the lower extreme that hangs rotor (7) passes through threaded connection with drill bit (8).
2. The downhole motor tool running and salvaging type casing drilling device according to claim 1, wherein: the connecting threads between the cylinder body (1) and the mounting sleeve (5) and between the suspension rotor (7) and the drill bit (8) are TBG threads, and a conical surface sealing structure (9) is arranged at the connecting part between the drilling tool rotor (3) and the suspension rotor (7).
3. The downhole motor tool running and salvaging type casing drilling device according to claim 1, wherein: a thrust bearing (6) is clamped between the lower end face of the mounting sleeve (5) and the upper end face of the drill bit (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911086173.9A CN110700756A (en) | 2019-11-08 | 2019-11-08 | Casing drilling device for downhole power drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911086173.9A CN110700756A (en) | 2019-11-08 | 2019-11-08 | Casing drilling device for downhole power drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110700756A true CN110700756A (en) | 2020-01-17 |
Family
ID=69204733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911086173.9A Pending CN110700756A (en) | 2019-11-08 | 2019-11-08 | Casing drilling device for downhole power drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110700756A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115341844A (en) * | 2022-10-14 | 2022-11-15 | 沧州格锐特钻头有限公司 | Short-bending impact-resistant large-torque screw drill |
-
2019
- 2019-11-08 CN CN201911086173.9A patent/CN110700756A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115341844A (en) * | 2022-10-14 | 2022-11-15 | 沧州格锐特钻头有限公司 | Short-bending impact-resistant large-torque screw drill |
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