CN210002402U - hydraulic drilling and pile-rotating equipment - Google Patents
hydraulic drilling and pile-rotating equipment Download PDFInfo
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- CN210002402U CN210002402U CN201920279748.8U CN201920279748U CN210002402U CN 210002402 U CN210002402 U CN 210002402U CN 201920279748 U CN201920279748 U CN 201920279748U CN 210002402 U CN210002402 U CN 210002402U
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Abstract
The utility model relates to an appurtenance of oil field oil well operation construction especially relates to fluid pressure type drilling pile screwing equipment, including boring a skeleton, going up fixed pulley, lower fixed pulley, moving about double pulley, hydraulic motor, conversion connector, piston rod, pneumatic cylinder, wire rope, bore a skeleton on sliding sleeve be equipped with the motor mount, the fixed plate setting of motor mount in the side of boring a skeleton, hydraulic motor install the fixed plate on, the hydraulic motor lower extreme during drilling with auger bit be connected, the hydraulic motor lower extreme passes through during pile screwing the conversion connector with the spiral ground anchor be connected, the shaft of last fixed pulley and lower fixed pulley fixed connection respectively in the top and the bottom of boring a skeleton the utility model has the characteristics of light in weight, easy operation, degree of automation height, safe and reliable, can alleviate intensity of labour, reduce the potential safety hazard, practice thrift the construction cost when using, be favorable to accelerating the construction process.
Description
Technical Field
The utility model relates to an appurtenance of oil field oil well operation construction especially relates to fluid pressure type drilling pile rotating equipment.
Background
In the process of preparing construction for oil well operation, the spiral ground anchor is required to be screwed into the ground, the derrick guy rope is fixed on the spiral ground anchor, and the derrick is pulled by the spiral ground anchor to prevent the derrick from toppling. The current commonly used ground anchor wedging into the ground mainly comprises the following modes:
① driving the ground anchor into the ground by using a piling car, ② manually pressing and rotating the spiral ground anchor into the ground by using the spiral ground anchor, ③ manually driving a drilling bit by using a small gasoline engine to drill and then manually screwing the spiral ground anchor into the ground, ④ manually driving a chain by controlling a handrail wheel to control the upper part and the lower part of a hydraulic motor and preventing the hydraulic motor from rotating by a mechanism, driving the drilling bit to drill by using the hydraulic motor, manually screwing the spiral ground anchor into the ground, ⑤ drilling by using other special drilling equipment (most of which are heavy and need a special power source), and manually screwing the spiral ground anchor into the ground.
The problems of the construction methods are as follows: 1. the manual control has high labor intensity and is easy to hurt people; 2. the equipment is heavy, the operation and the control are not protected; 3. the adaptability of the construction site is poor, and the construction efficiency is low.
Disclosure of Invention
For solving the problem in the background art, the utility model provides an fluid pressure type drilling pile rotating equipment, this equipment structure is simple, and the security performance is high, uses convenient operation, and work safe and reliable reduces construction cost, shortens construction cycle.
The technical scheme provided by the utility model is that hydraulic drilling pile screwing equipment comprises a spiral drill bit and a spiral ground anchor, and is characterized by further comprising a pile drilling framework, an upper fixed pulley, a lower fixed pulley, a traveling double pulley, a hydraulic motor, a conversion connector, a piston rod, a hydraulic cylinder and a steel wire rope, wherein the pile drilling framework is slidably sleeved with a motor fixing frame, a fixing plate of the motor fixing frame is arranged on the side of the pile drilling framework, the hydraulic motor is arranged on the fixing plate, the lower end of the hydraulic motor is connected with the spiral drill bit during drilling, the lower end of the hydraulic motor is connected with the spiral ground anchor through the conversion connector during pile screwing, the upper end and the lower end of the motor fixing frame are respectively and fixedly connected with a steel wire rope fixing head, the wheel shafts of the upper fixed pulley and the lower fixed pulley are respectively and fixedly connected to the top and the bottom of the pile drilling framework, the hydraulic cylinder is fixedly connected to the lower end of the pile drilling framework on the other side opposite to the hydraulic motor, the lower end of the pile drilling framework is fixedly connected with the hydraulic cylinder supporting rod of the hydraulic motor supporting rod of the hydraulic cylinder through a hydraulic cylinder supporting rod of a hydraulic cylinder fixing frame, the hydraulic motor supporting rod of the hydraulic motor fixing frame, the hydraulic motor fixing frame is fixedly connected with the hydraulic cylinder supporting rod of the hydraulic cylinder supporting rod, the hydraulic cylinder supporting rod of the hydraulic cylinder supporting rod, the supporting rod of the hydraulic cylinder supporting rod is fixedly connected with the hydraulic cylinder supporting rod of the hydraulic cylinder supporting rod, the hydraulic cylinder supporting rod of the hydraulic cylinder supporting rod, the hydraulic cylinder supporting rod.
The sliding sleeving part of the motor fixing frame and the pile drilling framework is provided with guide wheels, wheel shafts of the guide wheels are fixedly connected to the motor fixing frame, the guide wheels are abutted to the pile drilling framework, the guide wheels are cylindrical bearings, ends of the two steel wire ropes are respectively connected with two steel wire rope fixing heads on the motor fixing frame, the two steel wire rope fixing heads are arranged on the motor fixing frame, steel wire rope clamping heads are arranged on the motor fixing frame and clamped on the steel wire ropes, the steel wire ropes move to drive the motor fixing frame to move up and down, a guide shield is fixedly connected to the bottom end of the pile drilling framework on the side of the hydraulic motor and is of a cylindrical structure with a notch, the notch is far away from the pile drilling framework and is coaxial with the hydraulic motor, two sides of the top end of the pile drilling framework are respectively and fixedly connected with handrails, a walking wheel support is fixedly connected to the other side of the pile drilling framework opposite to the guide shield, walking wheels are mounted on the walking wheel support, the walking wheels are respectively hinged to two side ends of the pile drilling framework adjacent to the hydraulic cylinder, the anti-falling support rods are respectively hinged to a transverse anti-falling support rod, the anti-falling support rod is fixedly connected to a transverse-falling pole supporting rod, a transverse-falling pole supporting rod fixedly connected to the transverse pole supporting rod of the transverse-falling anti-falling pole supporting rod, and a transverse-falling anti-falling.
The utility model has the advantages that:
1. the utility model discloses can drill, can be with spiral earth anchor screw in underground after drilling through changing crossover sub, whole process automation degree is high.
2. The utility model discloses with pneumatic cylinder and the double pulley combination work that moves about, realized single pneumatic cylinder driving distance, export and to make hydraulic motor walking double distance on the hydraulic motor frame, and need not to install overload protection additional on the walking distance.
3. The utility model has the characteristics of light weight, simple operation, safety and reliability; when in use, the labor intensity can be reduced, the potential safety hazard can be reduced, the construction cost can be saved, and the construction process can be accelerated.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Fig. 3 is a partially enlarged view at B in fig. 1.
Fig. 4 is another -degree structural schematic diagram of the present invention.
Fig. 5 and 6 are schematic views of the transverse and longitudinal anti-falling support rods of the present invention after being completely folded.
Fig. 7 is a schematic view of the transverse falling preventive support rod of the present invention when it is unfolded to 120 degrees.
Fig. 8 is a schematic view of an embodiment of two steel cords.
Fig. 9 is a schematic view of an embodiment of steel cords.
Fig. 10 is a schematic view of a transverse anti-backup strut deployed 90 degrees relative to a drilled pile backbone.
Fig. 11 is a schematic view of a transverse anti-collapse strut deployed 120 degrees relative to a drilled pile frame.
In the figure: 1-hydraulic motor, 2-motor fixing frame, 3-conversion connecting head, 4-upper fixed pulley, 5-steel wire rope fixing head, 6-guide wheel, 7-handrail, 8-drilling pile framework, 9-steel wire rope, 10-traveling double pulley, 11-piston rod, 12-hydraulic control valve, 13-valve fixing frame, 14-hydraulic cylinder, 15-spiral ground anchor, 16-guide shield, 17-traveling wheel, 18-longitudinal anti-falling support rod, 19-lower fixed pulley and 20-transverse anti-falling support rod.
Detailed Description
The present invention will be described in with reference to the accompanying drawings:
with reference to fig. 1-7, the present embodiment includes a spiral drill bit and a spiral ground anchor 15, and further includes a pile drilling framework 8, an upper fixed pulley 4, a lower fixed pulley 19, a traveling double pulley 10, a hydraulic motor 1, a conversion connector 3, a piston rod 11, a hydraulic cylinder 14, and a steel wire rope 9.
Bore a skeleton 8 on sliding sleeve be equipped with motor mount 2, motor mount 2 the fixed plate setting in sides of boring a skeleton 8, hydraulic motor 1 install the fixed plate on, hydraulic motor 1 lower extreme during drilling with auger bit be connected, hydraulic motor 1 lower extreme passes through during pile screwing conversion connector 3 with spiral earth anchor 15 be connected, upper end and the lower extreme of motor mount 2 rigid coupling respectively have wire rope fixed head 5.
The axle of the upper fixed pulley 4 and the axle of the lower fixed pulley 19 are respectively and fixedly connected with the top and the bottom of the drilled pile framework 8, the hydraulic cylinder 14 is fixedly connected with the lower end of the drilled pile framework 8 opposite to the hydraulic motor 1 and on the other side, the piston rod 11 is inserted into the hydraulic cylinder 14 from the upper end of the hydraulic cylinder 14 and can reciprocate up and down in the hydraulic cylinder 14, the support of the traveling double pulley 10 is fixedly connected with the upper end of the piston rod 11, the up-and-down reciprocating motion of the piston rod 11 can drive the reciprocating motion of the traveling double pulley 10, the middle part of the drilled pile framework 8 on the hydraulic cylinder 14 side is fixedly connected with a valve fixing frame 13, the valve fixing frame 13 is provided with a hydraulic control valve 12, the hydraulic control valve 12 is of a double-valve-rod structure, and the upper end and the lower end of the drilled pile.
The utility model discloses a hydraulic cylinder 14, the double pulley 10 that moves about, the fixed pulley 19 that moves about is connected on the wire rope fixed head 5 of motor mount 2 lower extreme, the wire rope 9 has two, wherein the end of wire ropes 9 is connected on the wire rope fixed head 5 of drill stake skeleton 8 upper end, the free end of wire rope 9 is walked around from bottom to top and moves about double pulley 10 and connect on the wire rope fixed head 5 of motor mount 2 upper extreme after walking about fixed pulley 4 from top to bottom, when moving about double pulley 10 is down, must make motor mount 2 down, and the distance that moves about double pulley 10 is 1/2 that motor mount 2 is down distance, the utility model discloses working with hydraulic cylinder 14 and double pulley 10 combination, realized hydraulic cylinder 14 drive distance, export to motor 2 and can make motor 1 overload, and the fixed mount need not install the double distance of moving about and move about and need not to do not install double distance.
The hydraulic control valve 12 is connected with a power source through a pipeline, the liquid outlet end of the hydraulic control valve 12 is respectively connected with the hydraulic cylinder 14 and the hydraulic motor 1 through pipelines, and hydraulic pressure drives the piston rod 11 in the hydraulic cylinder 14 to move up and down and the hydraulic motor 1 to rotate in the positive and negative directions through pipelines by operating a valve rod of the hydraulic control valve 12.
The lower ends of two sides of the drilled pile framework 8 adjacent to the hydraulic cylinder 14 are respectively hinged with a transverse anti-falling supporting rod 20, the two transverse anti-falling supporting rods 20 can be unfolded and folded upwards relative to the drilled pile framework 8, and two sides of every transverse anti-falling supporting rods 20 are respectively hinged with a longitudinal anti-falling supporting rod 18.
The motor fixing frame 2 and the drilled pile framework 8 are slidably sleeved with each other, a guide wheel 6 is arranged at the position where the motor fixing frame 2 and the drilled pile framework 8 are slidably sleeved with each other, a wheel shaft of the guide wheel 6 is fixedly connected to the motor fixing frame 2, the guide wheel 6 abuts against the drilled pile framework 8, and the guide wheel 6 is used for ensuring that the motor fixing frame 2 can smoothly walk up and down and transmitting the reverse torque generated by the rotation of the hydraulic motor 1 to the drilled pile framework 8; in order to ensure the strength of the guide wheel 6, the guide wheel 6 is a cylindrical bearing.
The two steel wire ropes 9 are respectively provided with ends and are connected with the two steel wire rope fixing heads 5 on the motor fixing frame 2, the replacement scheme is that steel wire ropes 9 are provided, steel wire rope chucks are arranged on the motor fixing frame 2 and clamped on the steel wire ropes 9, and the motion of the steel wire ropes 9 drives the motor fixing frame 2 to move up and down.
The bottom end of the pile drilling framework 8 on the hydraulic motor 1 side is fixedly connected with a guide shield 16, the guide shield 16 is of a cylindrical structure with a notch, the notch is far away from the pile drilling framework 8, the guide shield 16 is coaxial with the hydraulic motor 1, the guide shield 16 has a guide angle for guiding the auger bit and the auger ground anchor 15 to prevent deviation when drilling or pile screwing, and drilled soil can be led out from the notch.
The two sides of the top end of the pile drilling framework 8 are respectively and fixedly connected with handrails 7, and convenience is provided for pulling during manual walking and erecting and righting during working.
And a walking wheel support is fixedly connected to the other side of the drilling pile framework 8 opposite to the guide shield 16, and a walking wheel 17 is mounted on the walking wheel support, so that the equipment is convenient to transfer.
The lower ends of two sides of the drilled pile framework 8 adjacent to the hydraulic cylinder 14 are respectively hinged with a transverse anti-falling supporting rod 20, the two transverse anti-falling supporting rods 20 can be unfolded and folded upwards relative to the drilled pile framework 8, and the maximum unfolding angle of each transverse anti-falling supporting rod 20 is 120 degrees. The purpose is in order to adapt to uneven ground, when there is pit or protruding on ground, this equipment can adapt to the less unevenness that exists on ground.
Every horizontal anti-falling pole support 20 all the rigid couplings have strong magnet piece on the face of laminating mutually with the bored pile skeleton 8 when drawing in, every vertical anti-falling pole support 18 all the rigid couplings have strong magnet piece on the face of laminating mutually with horizontal anti-falling pole support 20 when drawing in, prevent horizontal anti-falling pole support 20 and vertical anti-falling pole support 18 after packing up and expand at will.
When drilling or pile rotating work will be carried out, hydraulic motor 1 pivoted reverse moment of torsion is given for boring a skeleton 8, bore a skeleton 8 and give the moment of torsion for the horizontal anti-rotation branch 20 and the vertical anti-rotation branch 18 of bottom, so all be provided with the awl point arch of pricking underground on the face that contacts with ground after every horizontal anti-rotation branches 20 and every vertical anti-rotation branches 18 expand, bottom and ground contact produce the frictional force that was decided under the effect of people's gravity, and the awl point arch can be very big increase frictional resistance after pricking underground, thereby overcome the reverse moment of torsion that hydraulic motor 1 transmitted and fall.
The valve fixing frame 13 is fixedly connected with the hydraulic cylinder 14, so that the hydraulic cylinder 14 is righted, and the eccentric wear of the piston rod 11 and the hydraulic cylinder 14 caused by the shaking of the upper end of the overlong hydraulic cylinder 14 is prevented.
The utility model discloses a use is:
when in use, the power source is connected with the hydraulic control valve 12, the position of the pile to be drilled is selected, the circle center of the guide shield 16 is aligned with the circle center, the utility model discloses erect, the horizontal anti-falling support rod 20 is unfolded, the vertical anti-falling support rod 18 is unfolded, and the unfolded state is as shown in figure 1 or figure 4.
The hydraulic control valve 12 is operated to move the piston rod 11 in the hydraulic cylinder 14 downward, and at this time, the hydraulic motor 1 is raised to the topmost position, and the auger bit is mounted.
People on two sides stand on the transverse anti-falling supporting rod 20 and the longitudinal anti-falling supporting rod 18, the hydraulic control valve 12 is operated to start the hydraulic motor 1 to rotate, meanwhile, the hydraulic control valve 12 is operated to enable the piston rod 11 in the hydraulic cylinder 14 to ascend, the traveling double pulley 10 is lifted, the motor fixing frame 2 is lowered, so that the hydraulic motor 1 drives the spiral drill bit to drill downwards, the hydraulic motor 1 continues to rotate after the spiral drill bit drills to the lowest position, the hydraulic control valve 12 is operated to enable the piston rod 11 in the hydraulic cylinder 14 to descend, the motor fixing frame 2 is lifted, and the hydraulic motor 1 drives the spiral drill bit to ascend to the highest point to stop lifting and rotating, so that drilling is completed.
After drilling, the spiral drill bit is detached, and the spiral ground anchor 15 is installed after the conversion connector 3 is installed. After the installation, people on two sides stand on the transverse anti-falling supporting rod 20 and the longitudinal anti-falling supporting rod 18, the hydraulic control valve 12 is operated to start the hydraulic motor 1 to rotate, meanwhile, the hydraulic control valve 12 is operated to enable the piston rod 11 in the hydraulic cylinder 14 to ascend, the motor fixing frame 2 descends, and the hydraulic motor 1 drives the conversion connecting head 3 and the spiral ground anchor 15 to rotate. The screw anchor 15 is screwed into the ground, and when reaching the bottom point, the screw anchor stops descending and stops rotating.
The fixing pins of the conversion connector 3 and the spiral ground anchor 15 are disassembled, the hydraulic control valve 12 is operated to lead the piston rod 11 in the hydraulic cylinder 14 to descend, the motor fixing frame 2 ascends, and the hydraulic motor 1 and the conversion connector 3 are separated from the spiral ground anchor 15; will vertically prevent down branch 18 and to prevent down branch 20 to the horizontal and draw close and pack up, will prevent down branch 20 with the horizontal and upwards pack up, will the utility model discloses put aside spiral earth anchor 15's anchor point, accomplish anchoring process.
After the operation and construction are finished, the process of screwing out the spiral ground anchor 15 is similar to the process of screwing in the spiral ground anchor 15. The difference lies in that: when screwing out, the hydraulic control valve 12 is operated to start the hydraulic motor 1 to rotate reversely, and then the screw anchor 15 is screwed out.
The utility model discloses the back that finishes using emptys it, makes walking wheel 17 exert the transfer effect, and the handrail 7 at top is held to the hand, stimulates the utility model discloses the walking.
The utility model has high automation degree, light weight, simple operation, safety and reliability; when in use, the labor intensity can be reduced, the potential safety hazard can be reduced, the construction cost can be saved, and the construction process can be accelerated.
Claims (8)
- The hydraulic drilling pile screwing equipment comprises a spiral drill bit and a spiral ground anchor (15), and is characterized by further comprising a pile drilling framework (8), an upper fixed pulley (4), a lower fixed pulley (19), a traveling double pulley (10), a hydraulic motor (1), a conversion connector (3), a piston rod (11), a hydraulic cylinder (14) and a steel wire rope (9), wherein the pile drilling framework (8) is slidably sleeved with a motor fixing frame (2), a fixing plate of the motor fixing frame (2) is arranged on the side of the pile drilling framework (8), the hydraulic motor (1) is arranged on the fixing plate, the lower end of the hydraulic motor (1) is connected with the spiral drill bit during drilling, the lower end of the hydraulic motor (1) is connected with the spiral ground anchor (15) through the conversion pulley (3) during pile screwing, the upper end and the lower end of the motor fixing frame (2) are respectively and fixedly connected with steel wire rope fixing heads (5), the upper fixed pulley (4) and the lower fixed pulley (19) are respectively and fixedly connected with a hydraulic cylinder (14) through a hydraulic cylinder (3) shaft (9) which is fixedly connected with a hydraulic cylinder (13), the hydraulic cylinder (14) which is fixedly connected with a hydraulic cylinder (14) and a hydraulic cylinder (9), the hydraulic cylinder (9) which is fixedly connected with a hydraulic cylinder (9) and a hydraulic cylinder (9), the hydraulic cylinder (9) which is fixedly connected with a hydraulic cylinder (9) and a hydraulic cylinder (9) which is fixedly connected with a hydraulic cylinder (9) after the hydraulic cylinder (9) and a hydraulic cylinder (9), the hydraulic cylinder (9) is fixedly connected with a hydraulic cylinder (9) which is fixedly connected with a hydraulic cylinder (9) and a hydraulic cylinder (9) which is fixedly connected with a hydraulic cylinder (9) which is fixed from the upper end of a hydraulic cylinder (9) and a hydraulic cylinder (9) which is fixed, the upper hydraulic cylinder (9) and a hydraulic cylinder (9) which is fixed from the hydraulic cylinder (9) and a hydraulic cylinder (9) which is fixed, the upper end of a hydraulic cylinder (9) which is connected with a hydraulic cylinder (9) which is fixed from the hydraulic cylinder (9) and a hydraulic cylinder (9) which is fixed, the upper end of a hydraulic cylinder (9) and a hydraulic cylinder (9) which is fixed from the upper end;a guide wheel (6) is arranged at the sliding sleeving position of the motor fixing frame (2) and the drilled pile framework (8), a wheel shaft of the guide wheel (6) is fixedly connected to the motor fixing frame (2), and the guide wheel (6) is abutted to the drilled pile framework (8), and is a cylindrical bearing;the two steel wire ropes (9) are respectively provided with ends and are connected with the two steel wire rope fixing heads (5) on the motor fixing frame (2), the alternative scheme is that steel wire ropes (9) are provided, steel wire rope chucks are arranged on the motor fixing frame (2), the steel wire rope chucks are clamped on the steel wire ropes (9), and the movement of the steel wire ropes (9) drives the motor fixing frame (2) to move up and down.
- 2. Hydraulic type drilling and pile-screwing equipment according to claim 1, wherein the bottom end of the drilling pile frame (8) at side of the hydraulic motor (1) is fixedly connected with a guide shield (16), the guide shield (16) is a cylindrical structure with a notch, the position of the notch is far away from the drilling pile frame (8), and the guide shield (16) is coaxial with the hydraulic motor (1).
- 3. A hydraulic drilling and pile-screwing device according to claim 2, wherein a road wheel bracket is fixed on the other side of the drilling pile framework (8) opposite to the guide shield (16), and a road wheel (17) is mounted on the road wheel bracket.
- 4. Hydraulic type drilling and pile-rotating equipment according to claim 1, wherein handrails (7) are respectively fixed to both sides of the top end of the drilling pile framework (8).
- 5. A hydraulic boring pile driver device according to claim 1, wherein each transverse collapse preventing bar (20) has a maximum deployment angle of 120 °.
- 6. A hydraulic drilling and pile-rotating apparatus according to claim 1, wherein each transverse anti-falling struts (20) are fixed with strong magnets on the surface attached to the drilling pile skeleton (8) when folded, and each longitudinal anti-falling struts (18) are fixed with strong magnets on the surface attached to the transverse anti-falling struts (20) when folded.
- 7. A hydraulic drilling and pile-rotating apparatus according to claim 1, wherein each transverse falling preventive struts (20) and each longitudinal falling preventive struts (18) are provided with a conical tip protrusion penetrating into the ground on the surface contacting with the ground after being unfolded.
- 8. Hydraulic pressure type drilling and pile-screwing equipment according to claim 1, wherein the valve holder (13) is fixed to the hydraulic cylinder (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920279748.8U CN210002402U (en) | 2019-03-06 | 2019-03-06 | hydraulic drilling and pile-rotating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920279748.8U CN210002402U (en) | 2019-03-06 | 2019-03-06 | hydraulic drilling and pile-rotating equipment |
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| Publication Number | Publication Date |
|---|---|
| CN210002402U true CN210002402U (en) | 2020-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920279748.8U Active CN210002402U (en) | 2019-03-06 | 2019-03-06 | hydraulic drilling and pile-rotating equipment |
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| CN (1) | CN210002402U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763487A (en) * | 2019-03-06 | 2019-05-17 | 周慧妍 | A kind of fluid pressure type drilling rotation stake equipment |
-
2019
- 2019-03-06 CN CN201920279748.8U patent/CN210002402U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763487A (en) * | 2019-03-06 | 2019-05-17 | 周慧妍 | A kind of fluid pressure type drilling rotation stake equipment |
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