CN109267951B - Drill rod guiding mechanism - Google Patents
Drill rod guiding mechanism Download PDFInfo
- Publication number
- CN109267951B CN109267951B CN201811194743.1A CN201811194743A CN109267951B CN 109267951 B CN109267951 B CN 109267951B CN 201811194743 A CN201811194743 A CN 201811194743A CN 109267951 B CN109267951 B CN 109267951B
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- drill rod
- oil cylinder
- driving oil
- rotary arm
- shaped guide
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- 238000005553 drilling Methods 0.000 claims abstract description 46
- 238000006073 displacement reaction Methods 0.000 claims abstract description 26
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 13
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/24—Guiding or centralising devices for drilling rods or pipes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a drill rod guiding mechanism, which comprises a connecting base, a rotary arm and a driving oil cylinder, wherein the connecting base is provided with a connecting rod; one end of the rotary arm is pivoted on the connecting base, the other end of the rotary arm is pivoted with a U-shaped guide clamp, the cylinder body of the driving oil cylinder is pivoted on the connecting base, and the piston rod of the driving oil cylinder is pivoted on the rotary arm; the connecting base, the rotary arm and the driving oil cylinder form a crank rocker mechanism; a displacement sensor capable of measuring the displacement of the piston rod is fixedly arranged on the cylinder body of the driving oil cylinder; two side arms of the U-shaped guide clamp are respectively and oppositely provided with an elastic clamping and locking mechanism. The drill rod guide mechanism is used for guiding and righting the drill rod in the continuous circulation drilling process, and can ensure that the drill rod is centered with the axis of a main machine of the continuous circulation drilling device when entering or exiting the power tongs, so that slip teeth of the drill rod and the power tongs are prevented from being damaged; the speed and the efficiency of the connection and the disconnection of the drill rod are improved; the three-flap slips of the power tongs are guaranteed to uniformly clamp the drill rod body during the screwing-on and unscrewing operation, and damage to threads of the drill rod joint is effectively avoided.
Description
Technical Field
The invention relates to drilling equipment in the petroleum industry, in particular to a drill rod guiding mechanism for a continuous circulation drilling device.
Background
Patent ZL201010271989.1 proposes an uninterrupted cycle drilling device, mainly comprises drilling rod power tongs, power tongs bottom plate, balance compensation hydro-cylinder, cavity assembly, upper chamber bypass valve, lower chamber bypass valve, support assembly and drilling power slips. Continuous circulation drilling achieves stable equivalent circulation density and uninterrupted cuttings discharge throughout the drilling period, comprehensively improving wellbore conditions and drilling safety. The technique is particularly suited for safety drilling under narrow drilling fluid tight window conditions. In addition, in a large-displacement well, a horizontal well, a high-pressure high-temperature well and an underbalanced well, the technology can furthest ensure that the well wall does not collapse, avoid drill sticking, reduce drilling accidents and improve the mechanical drilling speed.
The power tongs of the main machine of the continuous circulation drilling device are of annular closed structures, and when a newly connected drill rod enters the power tongs in the process of connecting a single joint or the drill rod is moved out of the power tongs in the process of tripping and unloading the single joint, the drill rod and slips in the power tongs can collide with each other, so that the damage of slip teeth of the drill rod or the power tongs occurs. Therefore, the existing uninterrupted circulation drilling device needs to design an auxiliary centralizing device to centralize a newly inserted drill rod (or a pre-shifted drill rod) so as to vertically enter (or deviate from) the power tongs; in the process of connecting a single joint, when connecting a newly-connected drill rod with the screw thread of the top drive extension joint, an auxiliary righting device is also needed to ensure that the newly-connected drill rod and the top drive extension joint are successfully buckled; when the screw thread of the newly-connected drill rod and the lower drill string is connected in the closed cavity, an auxiliary centering device is needed to enable the axle center of the newly-connected drill rod and the lower drill string below the newly-connected drill rod to be strictly centered (the axle centers of the lower drill string and the host of the continuous circulation drilling device are centered), so that the screw thread of the drill rod joint in the closed cavity can be ensured not to be damaged; furthermore, the clamping mechanism of the power tongs is of a three-petal centering structure, and an auxiliary centering device is also needed to ensure that the drill rod is strictly centered with the main machine axis of the continuous cycle drilling machine device in order to ensure that the three-petal slips of the power tongs uniformly clamp the drill rod body when the drill rod is clamped by the screwing-off operation.
Accordingly, the present inventors have developed a drill pipe guide mechanism to overcome the shortcomings of the prior art by years of experience and practice in the relevant industry.
Disclosure of Invention
The invention aims to provide a drill rod guiding mechanism which is used for guiding and righting a drill rod in the continuous circulation drilling process, ensuring that the drill rod is centered with the axis of a main machine of a continuous circulation drilling device when entering or exiting a power tong, and preventing slip teeth of the drill rod and the power tong from being damaged; the speed and the efficiency of the connecting and disconnecting drill rod are improved.
The invention further aims to provide a drill rod guiding mechanism, which ensures that three slips of the power tongs uniformly clamp a drill rod body during the tripping operation, and effectively avoids damaging threads of a drill rod joint.
The invention aims at realizing the aim, namely a drill rod guiding mechanism which is arranged on a power tong of a continuous circulation drilling device, wherein the drill rod guiding mechanism comprises a connecting base, a rotary arm and a driving oil cylinder; the connecting base is fixedly connected to the power tongs of the main machine of the continuous circulation drilling device, one end of the rotary arm is pivoted to the connecting base, the other end of the rotary arm is pivoted with a U-shaped guide clamp, the cylinder body of the driving oil cylinder is pivoted to the connecting base, and the piston rod of the driving oil cylinder is pivoted to the rotary arm; the connecting base, the rotary arm and the driving oil cylinder form a crank rocker mechanism; a displacement sensor capable of measuring the displacement of the piston rod is fixedly arranged on the cylinder body of the driving oil cylinder; two side arms of the U-shaped guide clamp are respectively and oppositely provided with an elastic clamping and locking mechanism.
In a preferred embodiment of the invention, the U-shaped guide clamp is arranged on the same plane with the two side arms horizontally in parallel, the pivot of the U-shaped guide clamp is horizontally arranged on the side arm of the U-shaped guide clamp and passes through the mass center of the pivot, and the U-shaped guide clamp is in a translational state when swinging along with the revolving arm.
In a preferred embodiment of the present invention, the rotary arm includes a first rotary arm and a second rotary arm disposed in parallel, and the first rotary arm and the second rotary arm are connected as a whole by a connecting rod; the driving oil cylinder comprises a first driving oil cylinder and a second driving oil cylinder which are arranged in parallel, and the displacement sensor is arranged on the cylinder body of the first driving oil cylinder.
In a preferred embodiment of the invention, the opposite inner sides of the two side arms of the U-shaped guide clip at the opening form a trumpet shape diverging towards the opening end.
In a preferred embodiment of the present invention, the pivoting arm is a telescopic structure, wherein the supporting rod is pivotally connected to the connecting base, and the free end of the moving rod is pivotally connected to the U-shaped guide clip.
In a preferred embodiment of the present invention, the elastic locking mechanism comprises stepped through holes with large outside and small inside respectively arranged on two side arms of the U-shaped guide clip, and a first annular step surface close to the inner side of the side arm is formed in the stepped through holes; a cylindrical locking head is arranged in the small-diameter hole of the stepped through hole, the cylindrical locking head is in a stepped shape with a small diameter and a large diameter front and back, a second annular stepped surface is formed, and the front end of the cylindrical locking head penetrates out of the small-diameter hole towards the inner side of the side arm and is propped against the first annular stepped surface of the stepped through hole; a circular spring seat is spirally arranged in the large-diameter hole of the stepped through hole, and a compression spring is arranged between the circular spring seat and the rear end face of the cylindrical clamping head.
In a preferred embodiment of the invention, the rear end face of the cylindrical locking head is provided with a concave hole; the spring seat is provided with an extending column in a protruding mode towards one side of the cylindrical clamping head, the extending column can penetrate into the concave hole, the compression spring is sleeved on the extending column, and the front end of the compression spring abuts against the rear end face of the cylindrical clamping head.
In a preferred embodiment of the present invention, the front end of the cylindrical locking head is a sphere; the cylindrical clamping head is in clearance fit with the stepped through hole in the shaft hole.
In a preferred embodiment of the present invention, the displacement sensor is fixedly connected to the cylinder body of the driving cylinder through the sensor frame; the sensor frame is composed of two semicircular sleeves sleeved on the cylinder body of the driving oil cylinder in a butt joint way, connecting lugs are respectively protruded outwards at two sides of the opening end of each semicircular sleeve, and the corresponding connecting lugs at two sides of the two semicircular sleeves are respectively connected by bolts; one of the semicircular sleeve side walls is provided with a connecting seat, and the displacement sensor is fixed on the connecting seat.
In the above-mentioned way, the drill rod guiding mechanism is used for guiding and righting the drill rod in the continuous circulation drilling process, so that the drill rod can be ensured to be centered with the main machine axis of the continuous circulation drilling device when entering or exiting the power tongs, and slip teeth of the drill rod and the power tongs are prevented from being damaged; the speed and the efficiency of the connection and the disconnection of the drill rod are improved; the three-flap slips of the power tongs are guaranteed to uniformly clamp the drill rod body during the screwing-on and unscrewing operation, and damage to threads of the drill rod joint is effectively avoided.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
fig. 1: a schematic of the drill rod guide mechanism of the present invention mounted on a continuous circulation drilling apparatus.
Fig. 2: is a schematic structural view of the drill rod guiding mechanism.
FIG. 3 is a schematic cross-sectional view of a U-shaped guide clip according to the present invention.
FIG. 4 is a schematic view of the structure of FIG. 3 at I in a partially enlarged manner.
FIG. 5 is a schematic view of the structure of the sensor rack according to the present invention.
FIG. 6 is a schematic view of the drill rod guide mechanism of the present invention beginning to guide the drill rod.
FIG. 7 is a schematic view of the drill rod guide mechanism of the present invention guiding a drill rod to a centered position with respect to a host machine of the continuous circulation drilling device.
Fig. 8 is a schematic view of the return position of the drill rod guide mechanism after the drill rod enters the power tongs.
Reference numerals:
100. a drill rod guide mechanism;
1. a rotary arm;
11. A first rotary arm;
12. a second rotary arm;
13. A connecting rod;
2. A driving oil cylinder;
21. A cylinder;
22. A piston rod;
28. a first drive cylinder;
29. a second driving cylinder;
3. A U-shaped guide clip;
31. a side arm;
32. a horn mouth;
4. A displacement sensor;
5. an elastic locking mechanism;
51. A stepped through hole;
511. A first annular stepped surface;
52. a cylindrical clamping head;
521. a second annular stepped surface;
522. concave holes;
53. A spring seat;
531. An extension column;
54. A compression spring;
6. a sensor holder;
61. A semicircular sleeve;
611. a connecting lug;
62. a connecting seat;
9. the base is connected;
91. a first hinge base;
92. The second hinge seat;
200. a continuous circulation drilling device;
201. A power clamp;
202. and a cavity assembly.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 8, the present invention proposes a drill rod guiding mechanism 100, the drill rod guiding mechanism 100 is mounted on a power tongs 201 of a continuous circulation drilling device 200, the drill rod guiding mechanism 100 comprises a connection base 9, a rotary arm 1 and a driving oil cylinder 2; the connecting base 9 is fixedly connected to a power clamp 201 of a main machine of the continuous circulation drilling device 200, one end of the rotary arm 1 is pivoted to the connecting base 9, the other end of the rotary arm 1 is pivoted to the U-shaped guide clamp 3, a cylinder body 21 of the driving oil cylinder 2 is pivoted to the connecting base 9, and a piston rod 22 of the driving oil cylinder 2 is pivoted to the rotary arm 1; in this embodiment, the connection base 9 includes a first hinge seat 91 pivotally connected to the swing arm 1 and a second hinge seat 92 pivotally connected to the driving cylinder 2, the first hinge seat 91 is disposed on one side of the center of the top surface of the power tongs 201, the second hinge seat 92 is disposed on the other side of the center of the top surface of the power tongs 201, and the connection base 9, the swing arm 1 and the driving cylinder (including the cylinder 21 and the piston rod 22) form a crank rocker mechanism; wherein, the driving cylinder 2 is a driving component, when the piston rod 22 reciprocates along the cylinder body 21, the cylinder body 21 swings around the second hinging seat 92, and meanwhile, the rotary arm 1 also swings around the first hinging seat 91; a displacement sensor 4 capable of measuring the displacement of the piston rod 22 is fixedly arranged on the cylinder body 21 of the driving oil cylinder, and in the embodiment, the displacement sensor 4 calculates the lifting angle of the rotary arm 1 by measuring the displacement of the piston rod 22, so that the position information of the U-shaped guide clamp 3 is accurately obtained; the two side arms 31 of the U-shaped guide clamp 3 are respectively and oppositely provided with an elastic locking mechanism 5; in this embodiment, the U-shaped guide clip 3 is disposed on the same plane with the two side arms 31 horizontally juxtaposed, the pivot of the U-shaped guide clip 3 is disposed on the two side arms 31 horizontally and the pivot passes through the center of mass of the pivot, and the U-shaped guide clip 3 is in a translational state when swinging along with the swing arm 1.
When the drill rod guiding mechanism is used, the piston rod 22 of the driving oil cylinder 2 extends outwards to drive the rotary arm connected with the driving oil cylinder to swing, meanwhile, the rotary arm 1 drives the U-shaped guiding clamp 3 to translate and lift, and when the displacement sensor 4 detects that the U-shaped guiding clamp 3 reaches a preset position (namely, the contact position of the drill rod and the U-shaped guiding clamp 3 is started), the piston rod 22 stops extending outwards. The opening structure on the U-shaped guide clamp 3 can rapidly guide the drill rod to enter the U-shaped guide clamp, the drill rod compression elastic locking mechanism 5 retracts into the U-shaped guide clamp, the elastic locking mechanism 5 automatically pops out after the drill rod enters the U-shaped guide clamp, the drill rod is prevented from falling out of the U-shaped guide clamp, meanwhile, the drill rod can be prevented from shaking in the subsequent movement, and the centering precision and efficiency are further improved. When the drill rod moves towards the center of the main machine of the continuous circulation drilling device 200, the piston rod 22 retracts in a follow-up manner until the displacement sensor 4 detects that the drill rod is at a position centered with the center of the main machine of the continuous circulation drilling device 200, the piston rod 22 stops retracting, the U-shaped guide clamp always straightens the drill rod in the whole moving process of the drill rod until the drill rod vertically enters a preset position in the cavity assembly 202 of the continuous circulation drilling device 200 through the power clamp 201 to complete necessary operation, the piston rod 22 of the driving oil cylinder 2 completely retracts, the drill rod guide mechanism completely falls down and lies on a lifting cover of the main machine power clamp, and the drill rod guide mechanism 100 stops working.
In the above-mentioned way, the drill rod guiding mechanism is used for guiding and righting the drill rod in the continuous circulation drilling process, so that the drill rod can be ensured to be centered with the main machine axis of the continuous circulation drilling device when entering or exiting the power tongs, and slip teeth of the drill rod and the power tongs are prevented from being damaged; the speed and the efficiency of the connection and the disconnection of the drill rod are improved; the three-flap slips of the power tongs are guaranteed to uniformly clamp the drill rod body during the screwing-on and unscrewing operation, and damage to threads of the drill rod joint is effectively avoided.
Further, in the present embodiment, as shown in fig. 2, the rotary arm 1 includes a first rotary arm 11 and a second rotary arm 12 disposed in parallel, and the first rotary arm 11 and the second rotary arm 12 are connected as a unit by a connecting rod 13; the driving oil cylinder 2 comprises a first driving oil cylinder 28 and a second driving oil cylinder 29 which are arranged in parallel, and the displacement sensor 4 is arranged on the cylinder body of the first driving oil cylinder 28.
In this embodiment, as shown in fig. 3, opposite inner sides of the arms 31 at the opening of the U-shaped guide clamp 3 form a flare 32 gradually expanding toward the opening end, so as to guide the drill rod into the U-shaped guide clamp 3 quickly.
In this embodiment, the rotary arm 1 may also be a telescopic rod structure, in which the support rod is pivotally connected to the connection base, and the free end of the moving rod is pivotally connected to the U-shaped guide clip 3.
As shown in fig. 4, in the present embodiment, the elastic latch mechanism 5 includes stepped through holes 51 with large outside and small inside apertures respectively provided on the two side arms 31 of the U-shaped guide clip 3, and a first annular stepped surface 511 near the inner side of the side arm is formed in the stepped through holes 51; a cylindrical locking head 52 is arranged in the small-diameter hole of the stepped through hole 51, the cylindrical locking head 52 is in a stepped shape with a small diameter front part and a large diameter rear part, a second annular stepped surface 521 is formed, the front end of the cylindrical locking head 52 penetrates out of the second annular stepped surface 521 towards the inner side of the side arm from the small-diameter hole to be abutted against the first annular stepped surface 511 of the stepped through hole 51, and the cylindrical locking head 52 can be prevented from falling out of the U-shaped guide clamp 3; a circular spring seat 53 is spirally arranged in the large-diameter hole of the stepped through hole 51, and a compression spring 54 is arranged between the circular spring seat 53 and the rear end face of the cylindrical locking head 52. The spring seat 53 is in threaded connection with the large-diameter hole of the stepped through hole 51, and the pretightening force of the compression spring can be adjusted by rotating and adjusting the position of the spring seat 53.
Further, as shown in fig. 4, a concave hole 522 is provided in the rear end face of the cylindrical locking head 52; the spring seat 53 projects forward toward the side of the cylindrical locking head 52 to form an extension column 531, the extension column 531 can penetrate into the concave hole 522, the compression spring 54 is sleeved on the extension column 531, and the front end of the compression spring 54 abuts against the rear end face of the cylindrical locking head 52. The extension column 531 can guide the inner ring of the cylindrical compression spring sleeved on the extension column 531.
In the embodiment, the front end of the cylindrical clamping lock head 52 is spherical, so that a drill rod can smoothly enter the U-shaped guide clamp 3; the cylindrical locking head 52 is in clearance fit with the stepped through hole 51 in a shaft hole, so that the cylindrical locking head 52 can flexibly extend or retract.
As shown in fig. 5, in the present embodiment, the displacement sensor 4 is fixedly connected to the body of the drive cylinder 2 through the sensor mount 6; the sensor frame 6 is composed of two semicircular sleeves 61 sleeved on the driving cylinder body 21 in a butt joint way, two sides of the opening end of each semicircular sleeve 61 are respectively provided with a connecting lug 611 in an outward protruding mode, and the corresponding connecting lugs 611 on two sides of the two semicircular sleeves 61 are respectively connected through bolts; one of the semicircular sleeves 61 is provided with a connecting seat 62 on the side wall, and the displacement sensor 4 is fixed on the connecting seat 62. The corresponding position of the driving oil cylinder body 21 is provided with a cylindrical shallow groove, the sensor frame is sleeved in the cylindrical shallow groove of the driving oil cylinder body 21, and the sensor frame is fixed on the driving oil cylinder body 21 by tightening the connecting bolt.
The displacement sensor is used in the invention; other types of positioning sensors can be selected according to actual needs.
The following specifically describes the operation of the drill rod guide mechanism of the present invention, taking the single connection process as an example.
In the process of connecting a single rod, after the top drive extension joint and the drill string 8 below the top drive extension joint are disconnected, when a new drill rod 7 is connected, piston rods of two driving oil cylinders extend outwards synchronously, two rotary arms fixedly connected with the corresponding piston rods are driven to swing, the U-shaped guide clamp 3 is driven to translate and lift, and when the displacement sensor 4 detects that the U-shaped guide clamp 3 reaches a preset position (namely, the position where the drill rod 7 and the U-shaped guide clamp 3 start to contact), the piston rods of the driving oil cylinders stop extending outwards as shown in fig. 6. The bell mouth 32 on the U-shaped guide clamp 3 can guide the drilling rod 7 to enter the U-shaped guide clamp 3 rapidly, the cylindrical locking head 52 of the drilling rod 7 compression elastic locking mechanism 5 retracts into the side arm of the U-shaped guide clamp 3, after the drilling rod 7 enters the U-shaped guide clamp 3, the cylindrical locking head 52 automatically pops out under the elastic force of the compression spring 54, the drilling rod 7 is prevented from falling out of the U-shaped guide clamp 3 and shaking in the subsequent movement process, and the centering precision and efficiency are further improved. Then, the lifting device (not shown in the figure) drives the drill rod 7 to move towards the center of the continuous circulation drilling device host, the piston rod of the driving oil cylinder is retracted in a follow-up manner, the drill rod guide mechanism 100 is used for centralizing the drill rod 7 all the time until the displacement sensor 4 detects that the drill rod 7 is in a position centered with the main shaft center of the continuous circulation drilling device host, the piston rod of the driving oil cylinder stops retracting, the drill rod guide mechanism 100 is used for centralizing the drill rod 7 until the drill rod 7 vertically enters a preset position in the cavity assembly 202 through the power tongs 201, the piston rod of the driving oil cylinder is retracted completely (shown in fig. 8), and the drill rod guide mechanism is used for completing work homing.
The order of operation of the drill rod guide mechanism 100 is exactly opposite to that of the joint (or post) when the drill rod is removed from the drill string, and will not be described in detail herein.
In summary, the drill rod guiding mechanism provided by the invention is used in continuous circulation drilling operation, and can be used for rapidly guiding the drill rod to be centered with the main shaft center of the main machine of the continuous circulation drilling device during the process of connecting a single joint (or an upright post) and tripping, so that the speed and the efficiency of connecting and disconnecting the drill rod are improved; the three slips of the power tongs are ensured to uniformly clamp the drill rod during the screwing-on and unscrewing operation, so that the damage to the threads of the drill rod joint in the closed cavity is effectively avoided; and the damage phenomenon of the slip teeth of the drill rod or the power tongs caused by the collision of the drill rod with the slips of the power tongs when the drill rod enters or moves out of the power tongs can be prevented.
The drill rod guiding mechanism is not only used for guiding the drill rod and the main machine of the continuous circulation drilling device to be centered in continuous circulation drilling operation, but also can be used for guiding other similar pipe bodies after the structural size of the drill rod guiding mechanism is changed.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (4)
1. The drill rod guiding mechanism is arranged on a power clamp of a continuous circulation drilling device and is characterized by comprising a connecting base, a rotary arm and a driving oil cylinder; the connecting base is fixedly connected to the power tongs of the main machine of the continuous circulation drilling device, one end of the rotary arm is pivoted to the connecting base, the other end of the rotary arm is pivoted with a U-shaped guide clamp, the cylinder body of the driving oil cylinder is pivoted to the connecting base, and the piston rod of the driving oil cylinder is pivoted to the rotary arm; the connecting base, the rotary arm and the driving oil cylinder form a crank rocker mechanism; a displacement sensor capable of measuring the displacement of the piston rod is fixedly arranged on the cylinder body of the driving oil cylinder; two side arms of the U-shaped guide clamp are respectively and oppositely provided with an elastic clamping and locking mechanism;
The U-shaped guide clamp is arranged on the same plane with the two side arms horizontally in parallel, the pivot of the U-shaped guide clamp is horizontally arranged on the side arms of the U-shaped guide clamp, the pivot passes through the mass center of the pivot, and the U-shaped guide clamp is in a translational state when swinging along with the revolving arm;
The rotary arms comprise a first rotary arm and a second rotary arm which are arranged in parallel, and the first rotary arm and the second rotary arm are connected into a whole through a connecting rod; the driving oil cylinder comprises a first driving oil cylinder and a second driving oil cylinder which are arranged in parallel, and the displacement sensor is arranged on the cylinder body of the first driving oil cylinder;
The elastic clamping and locking mechanism comprises stepped through holes with large outer side and small inner side respectively arranged on two side arms of the U-shaped guide clamp, and a first annular stepped surface close to the inner side of the side arm is formed in the stepped through holes; a cylindrical locking head is arranged in the small-diameter hole of the stepped through hole, the cylindrical locking head is in a stepped shape with a small diameter and a large diameter front and back, a second annular stepped surface is formed, and the front end of the cylindrical locking head penetrates out of the small-diameter hole towards the inner side of the side arm and is propped against the first annular stepped surface of the stepped through hole; a circular spring seat is spirally arranged in the large-diameter hole of the stepped through hole, and a compression spring is arranged between the circular spring seat and the rear end face of the cylindrical clamping head;
the rear end face of the cylindrical clamping lock head is provided with a concave hole; the spring seat is provided with an extending column in a protruding mode towards one side of the cylindrical clamping head, the extending column can penetrate into the concave hole, the compression spring is sleeved on the extending column, and the front end of the compression spring abuts against the rear end face of the cylindrical clamping head;
The front end of the cylindrical clamping lock head is a spherical surface; the cylindrical clamping head is in clearance fit with the stepped through hole in the shaft hole.
2. The drill rod guide mechanism of claim 1, wherein opposite inner sides of the side arms of the opening of the U-shaped guide clamp form a flared shape diverging toward the open end.
3. The drill rod guide mechanism of claim 1, wherein the swivel arm is a telescoping rod configuration, wherein the support rod is pivotally connected to the connection base, and wherein the free end of the movable rod is pivotally connected to the U-shaped guide clamp.
4. The drill rod guide mechanism according to claim 1, wherein the displacement sensor is fixedly connected to the body of the drive cylinder via a sensor mount; the sensor frame is composed of two semicircular sleeves sleeved on the cylinder body of the driving oil cylinder in a butt joint way, connecting lugs are respectively protruded outwards at two sides of the opening end of each semicircular sleeve, and the corresponding connecting lugs at two sides of the two semicircular sleeves are respectively connected by bolts; one of the semicircular sleeve side walls is provided with a connecting seat, and the displacement sensor is fixed on the connecting seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811194743.1A CN109267951B (en) | 2018-10-15 | 2018-10-15 | Drill rod guiding mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811194743.1A CN109267951B (en) | 2018-10-15 | 2018-10-15 | Drill rod guiding mechanism |
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| CN109267951A CN109267951A (en) | 2019-01-25 |
| CN109267951B true CN109267951B (en) | 2024-05-28 |
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| CN201811194743.1A Active CN109267951B (en) | 2018-10-15 | 2018-10-15 | Drill rod guiding mechanism |
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| CN112412366B (en) * | 2020-12-01 | 2022-08-05 | 中国石油天然气股份有限公司 | Sucker rod receiving device |
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| US6074153A (en) * | 1997-08-25 | 2000-06-13 | Allen; Jean-Luc | Drill rods feeding device |
| CN104533279A (en) * | 2014-11-19 | 2015-04-22 | 张朝纯 | Full-hydraulic dual-power combined type myriametre drilling machine |
| CN209212184U (en) * | 2018-10-15 | 2019-08-06 | 中国石油天然气集团有限公司 | Drilling rod guide mechanism |
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2018
- 2018-10-15 CN CN201811194743.1A patent/CN109267951B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3231318A (en) * | 1962-06-12 | 1966-01-25 | Atlas Copco Ab | Drill steel centralizers |
| US6074153A (en) * | 1997-08-25 | 2000-06-13 | Allen; Jean-Luc | Drill rods feeding device |
| CN104533279A (en) * | 2014-11-19 | 2015-04-22 | 张朝纯 | Full-hydraulic dual-power combined type myriametre drilling machine |
| CN209212184U (en) * | 2018-10-15 | 2019-08-06 | 中国石油天然气集团有限公司 | Drilling rod guide mechanism |
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