CN211524746U - Radial windowing and drilling device for underground casing of oil-water well - Google Patents
Radial windowing and drilling device for underground casing of oil-water well Download PDFInfo
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- CN211524746U CN211524746U CN201922396384.4U CN201922396384U CN211524746U CN 211524746 U CN211524746 U CN 211524746U CN 201922396384 U CN201922396384 U CN 201922396384U CN 211524746 U CN211524746 U CN 211524746U
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Abstract
The utility model discloses an oil-water well downhole casing pipe drilling equipment that radially windows, including upper and lower guiding orientation unit, rock stratum drilling unit and the unit of radially windowing. The upper and lower guiding and positioning units comprise slips and guiding devices; the rock stratum drilling unit comprises a joint, a rock stratum shell assembly and a rock stratum piston assembly; the radial windowing unit comprises a windowing piston assembly, a transmission mechanism and a windowing drill bit. The utility model discloses the radius of curvature is little, can carry out the radial windowing of the sleeve pipe in the pit of turning to on the horizontal direction to can need not play down the operation along windowing the hole, continue radially to rock stratum drilling with the rock stratum drill bit, operation strong adaptability, reliability are high, efficient and energy-conserving.
Description
Technical Field
The invention relates to the technical field of petroleum drilling equipment, in particular to a radial windowing and drilling device for an oil-water well underground casing.
Background
At present, the drilling technology of the multilateral well is multiple, and the drilling technology comprises casing windowing, side drilling and milling, window presetting, open hole side drilling, a radial multilateral well method, expansion pipe positioning logging, intelligent multilateral well and the like. Multilateral wells have many advantages: the recovery ratio is improved, the longitudinal opening degree of an oil-gas layer is improved, the drilling cost is reduced, the expenses of oil well management, environmental protection and the like are reduced, and the economic benefit is improved.
Currently, there are two methods of windowing commonly used in oil fields: the method comprises the steps of windowing by a whipstock and windowing by section milling, wherein if a sidetrack stratum is hard, the well cementation quality is poor, the underground condition of an old well is complex, the inclination angle of the well is large, a casing and a casing centralizer are not easy to be milled in sections, and when the selectable range of windowing points is limited, the windowing mode of the whipstock is generally adopted, otherwise, the windowing mode of the section milling type is generally selected; the turning curvature radius of the two is far larger than the diameter of the downhole tool, and the steering in the horizontal direction in the shaft can not be carried out, so that the operation efficiency and the operation precision of radial drilling are influenced.
Disclosure of Invention
The invention aims to provide a radial windowing and drilling device for an oil-water well underground casing, which has small curvature radius, can perform steering in the horizontal direction in a shaft during radial windowing of the underground casing, does not need pulling down along a windowing hole and can continue to drill a hole in the rock stratum radially by a rock stratum drill bit.
The technical scheme of the invention is as follows: oil-water well downhole casing radial windowing and drilling device comprises:
the upper and lower guiding and positioning units comprise slips fixed with the inner wall of the casing pipe, and guiding devices for up-and-down telescopic movement are fixedly arranged at the bottoms of the slips;
the rock stratum drilling unit comprises a joint fixedly connected with a guiding device, the lower end of the joint is fixedly connected with a rock stratum shell assembly, a rock stratum drill bit motor is arranged in the joint, the rock stratum shell assembly and the axis of a sleeve are eccentrically arranged, a rock stratum piston assembly used for moving up and down is hermetically arranged in the rock stratum shell assembly, an upper flexible shaft and a hollow flexible shaft are respectively fixed at the upper end and the lower end of the rock stratum piston assembly, the input end of the upper flexible shaft is connected with the output end of the rock stratum drill bit motor, the tail end of the hollow flexible shaft extends out of the rock stratum shell assembly and is vertically arranged with the sleeve in the radial direction, and a rock stratum drill bit is;
the drilling device comprises a radial windowing unit, wherein the radial windowing unit comprises a windowing piston assembly fixed at the lower end of a rock stratum shell assembly, the output end of the windowing piston assembly is connected with a windowing drill bit through a transmission mechanism, and the input end of the transmission mechanism is connected with the output end of a windowing drill bit motor.
Preferably, the guiding device comprises an upper positioning cylinder barrel and a lower positioning cylinder barrel which are fixedly arranged at the bottom of the slip and upper and lower positioning cylinder pistons arranged in the upper and lower positioning cylinder barrels, and piston rods of the upper and lower positioning cylinder pistons are connected with the top of the joint.
Preferably, the formation piston assembly comprises an upper bit feeding piston assembly and a lower bit feeding piston assembly;
the upper drill feeding piston assembly comprises a spline sleeve fixed at the lower end of the upper flexible shaft and an upper drill feeding cylinder fixed in the rock stratum shell assembly, an upper drill feeding cylinder piston is arranged in the upper drill feeding cylinder, an upper piston rod and a connecting rod are respectively and fixedly arranged at the upper end and the lower end of the upper drill feeding cylinder piston, and the upper piston rod is arranged in the spline sleeve and is in spline connection with the spline sleeve;
the lower bit feeding piston assembly comprises a lower bit feeding cylinder barrel fixed inside the rock stratum shell assembly, a lower bit feeding cylinder piston is movably arranged in the lower bit feeding cylinder barrel in a sealing mode, and the upper end and the lower end of the lower bit feeding cylinder piston are fixedly connected with the connecting rod and the hollow flexible shaft respectively.
Preferably, the rock stratum casing assembly includes that a plurality of baffles that the tube-shape shell and inner chamber interval were equipped with, a plurality of baffles form a plurality of installation chambeies with the tube-shape shell, spline housing, upper bit feeding cylinder and lower bit feeding cylinder are fixed in proper order on the baffle of installation chamber from top to bottom respectively.
Preferably, the windowing piston assembly comprises a windowing cylinder barrel and a windowing piston rod positioned in the windowing cylinder barrel.
Preferably, the transmission mechanism comprises a spline shaft, a large bevel gear and a small bevel gear, the spline shaft is connected with the windowing piston rod, the large bevel gear and the small bevel gear are meshed with each other and are located in the windowing cylinder barrel, and the small bevel gear is installed on an output shaft of the windowing drill bit motor.
Preferably, the hollow flexible shaft is sleeved with a guide sleeve.
Preferably, one side of the cylindrical shell of the stratum casing assembly is in contact with the inner wall of the casing, and the other side of the cylindrical shell of the stratum casing assembly forms a gap for the stratum drill bit to extend out of with the inner wall of the casing.
Preferably, the diameter of the windowing drill bit is larger than the diameter of the formation drill bit.
Compared with the prior art, the invention has the following advantages: the underground casing pipe with small curvature radius and capable of steering in the horizontal direction in the shaft is subjected to radial windowing, and a rock stratum drill bit is used for drilling holes in the radial direction towards the rock stratum without pulling down along the windowed holes, so that the underground casing pipe has the advantages of strong operation adaptability, high reliability, high efficiency and energy conservation. The invention can complete windowing well drilling by one-time well descending operation without pulling out and descending the well for many times, effectively shortens the well drilling period, saves the well drilling cost, lightens the labor intensity of workers, improves the construction effect and has better application prospect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. the drilling device comprises an oil pipe, 2 slips, 3 upper and lower positioning cylinder barrels, 4 upper and lower positioning cylinder rodless cavities, 5 upper and lower positioning cylinder rod cavities, 6 upper and lower positioning cylinder piston rods, 7 strata, 8 rock stratum drill bit motors, 9 upper flexible shafts, 10 upper piston rods, 11 spline sleeves, 12 upper drill bit upper cavities, 13 upper drill bit piston, 14 upper drill bit lower cavities, 15 upper drill bit cylinder barrels, 16 connecting rods, 17 lower drill bit upper cavities, 18 lower drill bit cylinder pistons, 19 lower drill bit lower cavities, 20 hollow flexible shafts, 21 cylindrical shells, 22 rock stratum drill bits, 23 spline shafts, 24 windowing well shafts, 25 windowing drill bits, 26 large cone gears, 27 small cone gears, 28 windowing drill bit motors, 29 windowing cylinder rodless cavities, 30 windowing cylinder piston rods, 31 windowing cylinder rod cavities, 32 windowing cylinder barrels and 33 guide sleeves, 34. the lower drilling cylinder 35, the partition plate 36, the joint 37, the casing 38 and the shaft.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
Referring to fig. 1, the oil-water well downhole casing radial windowing drilling device comprises an upper guide positioning unit, a lower guide positioning unit, a rock stratum drilling unit and a radial windowing unit.
The upper and lower guiding and positioning unit comprises a slip 2 fixed with the inner wall of the sleeve 37, and the bottom of the slip 2 is fixedly provided with an upper and lower positioning cylinder barrel 3 and an upper and lower positioning cylinder piston 6 arranged in the upper and lower positioning cylinder barrel 3.
The formation drilling unit comprises a joint 36, and the piston rods of the upper and lower positioning cylinder pistons 6 are connected to the top of the joint 36. The lower end of the joint 36 is fixedly connected with a rock stratum shell assembly, the rock stratum shell assembly comprises a cylindrical shell 21 and a plurality of partition plates 35 arranged in the inner cavity at intervals, and a plurality of installation cavities are formed by the partition plates 35 and the cylindrical shell 21. The rock stratum drill bit motor 8 is fixedly installed in the joint 36, the axes of the cylindrical shell 21 and the casing 37 are not in the same straight line, so that one side of the cylindrical shell 21 of the rock stratum shell assembly is in contact with the inner wall of the casing 37, a gap for the rock stratum drill bit 22 to extend out is formed between the other side of the cylindrical shell 21 of the rock stratum shell assembly and the inner wall of the casing, the front end of the rock stratum drill bit 22 is not in contact with the inner wall of the casing 37, and the inner wall of the casing 37 is.
And an upper bit feeding piston assembly and a lower bit feeding piston assembly which are used for moving up and down are hermetically arranged in the rock stratum shell assembly. An upper flexible shaft 9 is fixed at the upper end of the upper bit feeding piston assembly, a hollow flexible shaft 20 is fixed at the lower end of the lower bit feeding piston assembly, the input end of the upper flexible shaft 9 is connected with the output end of a rock stratum drill bit motor 8, the tail end of the hollow flexible shaft 20 extends out of the cylindrical shell 21 and is arranged vertically to the sleeve 37 in the radial direction, and a rock stratum drill bit 22 is installed at the tail end of the hollow flexible shaft 20. A hole may be drilled radially into the formation through the formation drill bit 22.
The upper drill feeding piston assembly comprises a spline sleeve 11 fixed at the lower end of the upper flexible shaft 9 and an upper drill feeding cylinder 15 inside the mounting cavity, an upper drill feeding cylinder piston 13 is arranged in the upper drill feeding cylinder 15, an upper piston rod 10 and a connecting rod 16 are respectively and fixedly arranged at the upper end and the lower end of the upper drill feeding cylinder piston 13, and the upper piston rod 10 is arranged in the spline sleeve 11 and is in splined connection with the spline sleeve 11.
The lower drill feeding piston assembly comprises a lower drill feeding cylinder 34 fixed inside the installation cavity, a lower drill feeding cylinder piston 18 is movably arranged in the lower drill feeding cylinder 34 in a sealing mode, the upper end and the lower end of the lower drill feeding cylinder piston 18 are fixedly connected with a connecting rod 16 and a hollow flexible shaft 20 respectively, 3 partition plates 35 are arranged, the 3 partition plates 35 and a cylindrical shell 21 form four installation cavities, and a spline sleeve 11, an upper drill feeding cylinder 15, the lower drill feeding cylinder 34 and a guide sleeve 33 of the hollow flexible shaft 20 are sequentially installed in the corresponding installation cavities from top to bottom.
The radial windowing unit comprises a windowing cylinder barrel 32 fixed at the lower end of a cylindrical shell 21 of the rock stratum shell assembly and a windowing piston rod 30 positioned in the windowing cylinder barrel 32, the end part of the windowing piston rod 30 is connected with a spline shaft 23, the tail end of the spline shaft 23 is provided with a windowing drill bit 25, the spline shaft 23 is provided with a large bevel gear 26, the bottom of the windowing cylinder barrel 32 is provided with a windowing drill bit motor 28, the output end of the windowing drill bit motor 28 is provided with a small bevel gear 27 positioned in the windowing cylinder barrel 32, and the large bevel gear 26 is meshed with the small bevel gear 27, so that when the windowing drill bit motor 28 drives the small bevel gear 27 to rotate, the large bevel gear 26 can be driven to rotate, the spline shaft 23 is driven to rotate through the spline, the windowing drill bit 25 fixedly connected with the shaft is driven to rotate, and meanwhile, the spline shaft 23 is subjected to continuous thrust of the windowing cylinder piston rod 30 connected with the spline shaft, and, finally, after the wall of the sleeve 37 is milled completely, high-pressure liquid enters the rod cavity 31 of the windowing cylinder, the windowing drill bit 25 is pulled, and the windowing drill bit 25 returns to the initial position.
Additionally, the diameter of the window bit 25 is greater than the diameter of the formation bit 22.
The specific structure of the radial windowing unit is as follows: the lower end of the upper flexible shaft 9 is connected with a spline housing 11, the spline housing 11 is connected with an upper piston rod 10 through a key, the upper piston rod 10 is fixedly connected with an upper drill feeding cylinder piston 13, and the upper drill feeding cylinder piston 13 is in sealing fit with an upper drill feeding cylinder barrel 15 and rotates; the upper end of the connecting rod 16 is fixedly connected with the upper drill feeding cylinder piston 13, the lower end of the connecting rod is fixedly connected with the lower drill feeding cylinder piston 18, the lower drill feeding cylinder piston 18 is in sealing fit with the lower drill feeding cylinder 34, the upper end of the hollow flexible shaft 20 is fixedly connected with the lower drill feeding cylinder piston 18, the hollow flexible shaft 20 can flexibly rotate in the guide sleeve 33 and can also axially move, the lower end of the hollow flexible shaft 20 is fixedly connected with the rock stratum drill bit 22, and the rock stratum drill bit motor 8 operates to drive the rock stratum drill bit 22 to rotate.
The working principle is as follows: the drilling tool is connected with the drilling tool through an oil pipe 1, the drilling tool is lowered to the specified depth of a shaft 38 and the windowing direction, the drilling tool is fixed on the wall of a shaft sleeve 37 through a slip 2, a windowing drill bit motor 28 is started to rotate through a ground control system, a small bevel gear 27 fixedly connected with the windowing drill bit motor 28 drives a large bevel gear 26 matched with the small bevel gear to rotate, the large bevel gear 26 drives a spline shaft 23 connected with the spline shaft to rotate, a windowing drill bit 25 fixedly connected with the shaft is driven to rotate, high-pressure liquid is injected into a rodless cavity 29 of a windowing cylinder 32, the spline shaft 23 is continuously pushed by a piston rod 30 of the windowing cylinder connected with the spline shaft, the windowing drill bit 25 continuously moves towards the axial outer side, and finally after the wall of the sleeve 37 is completely milled through, the rod cavity 31 of the windowing cylinder enters the high-pressure liquid, the windowing drill bit 25 receives a pulling force, and the windowing drill bit;
the lowering or resetting of the invention is controlled by injecting high pressure liquid into the rodless cavities 4 of the upper and lower positioning cylinders and the rod cavities 5 of the upper and lower positioning cylinders. After high-pressure liquid is injected into the rodless cavity 4 of the upper positioning cylinder and the lower positioning cylinder, the upper positioning cylinder piston 6 and the lower positioning cylinder piston 6 of the rock stratum drilling unit extend out to lower the oil-water well downhole casing windowing drilling device assembly, the rock stratum drill bit 22 is sent to the windowing hole of the casing 37, the rock stratum drill bit 22 is concentric with the windowing shaft 24 of the casing 37, and the piston rod of the upper positioning cylinder piston 6 and the piston rod of the lower positioning cylinder piston can only complete telescopic motion and cannot rotate; the rock stratum drill bit motor 8 operates to drive the upper flexible shaft 9 to rotate, the upper flexible shaft 9 drives the upper piston rod 10 to rotate through the splined sleeve 11 which is in key connection, and the upper piston rod 10 drives the upper drilling cylinder piston 13 to rotate; in addition, the upper bit feeding cylinder piston 13 drives the hollow flexible shaft 20 to rotate in the guide sleeve 33 through the connecting rod 16 and the lower bit feeding cylinder piston 18, so as to drive the rock stratum drill bit 22 to rotate. When the upper drill cylinder chamber 12 and the upper lower drill cylinder chamber 17 are simultaneously charged with high pressure fluid at a certain rate, the hollow flexible shaft 20 can be subjected to a thrust force, the thrust force continuously pushes the rock drill bit 22, the rock drill bit 22 drills to the deep of the stratum 7 while rotating, simultaneously, the hollow flexible shaft 20 sprays high-pressure liquid to remove rock debris drilled by the rock drill bit 22, and after the rock debris is drilled to the target depth, when the upper and lower feed cylinder lower chambers 14 and 19 are switched to feed the high-pressure fluid at a constant rate, so that the rock stratum drill bit 22 receives a continuous pulling force through the hollow flexible shaft 20, the rock stratum drill bit 22 returns to the initial position while rotating, the slip 2 is fixed and released, if a second radial well hole needs to be drilled, the windowing drill bit is adjusted to the required position, the actions are repeated, if not, the radial windowing drilling device assembly tool of the oil-water well downhole casing is provided, and the windowing drilling work is completed.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention, and the contents of the changes still fall within the scope of the present invention.
Claims (9)
1. Oil-water well downhole casing radial windowing and drilling device, its characterized in that includes:
the upper and lower guiding and positioning units comprise slips fixed with the inner wall of the casing pipe, and guiding devices for up-and-down telescopic movement are fixedly arranged at the bottoms of the slips;
the rock stratum drilling unit comprises a joint fixedly connected with a guiding device, the lower end of the joint is fixedly connected with a rock stratum shell assembly, a rock stratum drill bit motor is arranged in the joint, the rock stratum shell assembly and the axis of a sleeve are eccentrically arranged, a rock stratum piston assembly used for moving up and down is hermetically arranged in the rock stratum shell assembly, an upper flexible shaft and a hollow flexible shaft are respectively fixed at the upper end and the lower end of the rock stratum piston assembly, the input end of the upper flexible shaft is connected with the output end of the rock stratum drill bit motor, the tail end of the hollow flexible shaft extends out of the rock stratum shell assembly and is vertically arranged with the sleeve in the radial direction, and a rock stratum drill bit is;
the drilling device comprises a radial windowing unit, wherein the radial windowing unit comprises a windowing piston assembly fixed at the lower end of a rock stratum shell assembly, the output end of the windowing piston assembly is connected with a windowing drill bit through a transmission mechanism, and the input end of the transmission mechanism is connected with the output end of a windowing drill bit motor.
2. The oil-water well downhole casing radial windowing and drilling device according to claim 1, wherein: the guiding device comprises an upper positioning cylinder barrel and a lower positioning cylinder barrel which are fixedly arranged at the bottom of the slip and an upper positioning cylinder piston and a lower positioning cylinder piston which are arranged in the upper positioning cylinder barrel and the lower positioning cylinder barrel, and piston rods of the upper positioning cylinder piston and the lower positioning cylinder piston are connected with the top of the joint.
3. The oil-water well downhole casing radial windowing and drilling device according to claim 2, wherein: the rock stratum piston assembly comprises an upper bit feeding piston assembly and a lower bit feeding piston assembly;
the upper drill feeding piston assembly comprises a spline sleeve fixed at the lower end of the upper flexible shaft and an upper drill feeding cylinder fixed in the rock stratum shell assembly, an upper drill feeding cylinder piston is arranged in the upper drill feeding cylinder, an upper piston rod and a connecting rod are respectively and fixedly arranged at the upper end and the lower end of the upper drill feeding cylinder piston, and the upper piston rod is arranged in the spline sleeve and is in spline connection with the spline sleeve;
the lower bit feeding piston assembly comprises a lower bit feeding cylinder barrel fixed inside the rock stratum shell assembly, a lower bit feeding cylinder piston is movably arranged in the lower bit feeding cylinder barrel in a sealing mode, and the upper end and the lower end of the lower bit feeding cylinder piston are fixedly connected with the connecting rod and the hollow flexible shaft respectively.
4. The oil-water well downhole casing radial windowing and drilling device according to claim 3, wherein: the rock stratum casing assembly comprises a cylindrical shell and a plurality of partition plates arranged in the inner cavity at intervals, the partition plates and the cylindrical shell form a plurality of installation cavities, and the spline sleeve, the upper bit feeding cylinder barrel and the lower bit feeding cylinder barrel are sequentially fixed on the partition plates of the installation cavities from top to bottom respectively.
5. The oil-water well downhole casing radial windowing and drilling device according to claim 3 or 4, wherein: the windowing piston assembly comprises a windowing cylinder barrel and a windowing piston rod located in the windowing cylinder barrel.
6. The oil-water well downhole casing radial windowing and drilling device according to claim 5, wherein: the transmission mechanism comprises a spline shaft, a large bevel gear and a small bevel gear, the spline shaft is connected with the windowing piston rod, the large bevel gear and the small bevel gear are meshed with each other and are located in the windowing cylinder barrel, and the small bevel gear is installed on an output shaft of the windowing drill bit motor.
7. The oil-water well downhole casing radial windowing and drilling device according to claim 6, wherein: the hollow flexible shaft is sleeved with a guide sleeve.
8. The oil-water well downhole casing radial windowing and drilling device according to claim 4, wherein: one side of the cylindrical shell of the rock stratum shell assembly is in contact with the inner wall of the casing, and a gap for the rock stratum drill bit to extend out is formed between the other side of the cylindrical shell of the rock stratum shell assembly and the inner wall of the casing.
9. The oil-water well downhole casing radial windowing and drilling device according to claim 1, wherein: the diameter of the windowing drill bit is larger than that of the rock stratum drill bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922396384.4U CN211524746U (en) | 2019-12-27 | 2019-12-27 | Radial windowing and drilling device for underground casing of oil-water well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922396384.4U CN211524746U (en) | 2019-12-27 | 2019-12-27 | Radial windowing and drilling device for underground casing of oil-water well |
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| CN211524746U true CN211524746U (en) | 2020-09-18 |
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| CN201922396384.4U Active CN211524746U (en) | 2019-12-27 | 2019-12-27 | Radial windowing and drilling device for underground casing of oil-water well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821433A (en) * | 2019-12-27 | 2020-02-21 | 胜利油田高原石油装备有限责任公司 | Radial windowing and drilling device for underground casing of oil-water well |
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2019
- 2019-12-27 CN CN201922396384.4U patent/CN211524746U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821433A (en) * | 2019-12-27 | 2020-02-21 | 胜利油田高原石油装备有限责任公司 | Radial windowing and drilling device for underground casing of oil-water well |
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Effective date of registration: 20210119 Address after: No.171 Fenhe Road, Dongying District, Dongying City, Shandong Province 257091 Patentee after: Shandong Plateau oil and gas equipment Co.,Ltd. Address before: 257091 82 Fuqian street, Dongying District, Dongying City, Shandong Province Patentee before: SHENGLI OILFIELD HIGHLAND PETROLEUM EQUIPMENT Co.,Ltd. |