CN112901087B

CN112901087B - Petroleum drill pipe

Info

Publication number: CN112901087B
Application number: CN202110115318.4A
Authority: CN
Inventors: 李宛芸; 苏强
Original assignee: Yanchang Yongtong Petroleum Technology Service Co ltd
Current assignee: Yanchang Yongtong Petroleum Technology Service Co ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2023-08-25
Anticipated expiration: 2041-01-28
Also published as: CN112901087A

Abstract

The invention discloses an oil drill rod, which comprises a drill pipe, wherein one end of the drill pipe is connected with a drill bit, the other end of the drill pipe is provided with a connector, the surface of the drill pipe is provided with a locking device, the locking device comprises a first locking ring and a second locking ring, the surfaces of the first locking ring and the second locking ring are provided with locking blocks, the surfaces of the two sides of the first locking ring and the second locking ring are connected with clamping devices, the clamping devices comprise a lower clamping block and an upper clamping block, the upper end of the upper clamping block is provided with a clamping block, the surfaces of the locking block and the clamping block are provided with through holes, threaded rods are arranged in the through holes, and nuts are arranged at the two ends of the threaded rods. The petroleum drill rod is not easy to slip during carrying, can be used for carrying a plurality of drill rods with different sizes at the same time, and has high carrying efficiency.

Description

Petroleum drill pipe

Technical Field

The invention relates to the field of oil exploitation, in particular to an oil drill rod.

Background

The drill rod is a steel pipe with threads at the tail part and is used for connecting surface equipment of a drilling machine and drilling and grinding equipment or a bottom hole device at the bottom end of a drilling well, the drill rod is used for conveying drilling mud to a drill bit and lifting, lowering or rotating the bottom hole device together with the drill bit, and can bear huge internal and external pressure, distortion, bending and vibration, and the drill rod can be used for multiple times in the exploitation and refining processes of oil gas;

the invention patent number CN 108915608B discloses a petroleum drill rod, which specifically comprises a conveying mechanism, a first fixing seat, a connecting pipe, a second fixing seat, a cleaning mechanism, a washing mechanism, a lubricating mechanism, an air drying mechanism, a box body, a power supply box, a drill rod main body, an adapter and a drill bit; according to the invention, the mud scraping mechanism can be used for scraping mud on the outer wall of the passing drill rod, so that the mud on the outer wall of the drill rod is quickly separated from the drill rod, and the later manual cleaning is not needed; through washing mechanism and lubrication mechanism, can spray water and lubricating oil to the drilling rod outside for can remain lubricated state throughout when the processing of drilling rod, improve the smoothness of drilling rod processing, washing mechanism can carry out water spray cleaning to the drilling rod, can with the combined action of mud scraping mechanism, make the outer wall of drilling rod cleaner; the outer wall of the drill rod can be dried through the air drying mechanism, so that the finally recovered drill rod is in a clean and dry state, and secondary treatment is not required to be performed manually;

in carrying the in-process to the drilling rod, owing to be independent separation between the drilling rod, and the surface is smooth, when carrying many drilling rods simultaneously, skidding appears easily, often can only single transport during the operation, and the transport is inconvenient inadequately, and efficient, in addition, the drilling rods of many different sizes of being inconvenient for simultaneously carrying more, in order to solve above-mentioned problem, we have proposed a petroleum drilling rod.

Disclosure of Invention

The invention mainly aims to provide an oil drill rod which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

an oil drill pipe, includes the drill pipe, its characterized in that: one end of the drill pipe is connected with a drill bit, and the other end of the drill pipe is provided with a connector; the surface of the drill pipe is provided with a locking device, and two sides of the locking device are respectively provided with a clamping device; the locking device comprises a first locking ring, a second locking ring and a locking block; the upper end surfaces and the lower end surfaces of the first locking ring and the second locking ring are respectively provided with a locking block, and the locking blocks are positioned at the end parts of the first locking ring and the second locking ring; clamping devices are connected to the two side surfaces of the first locking ring and the second locking ring;

the clamping device comprises a lower clamping block, a bayonet, a hinge, an upper clamping block, a clamping block and a pull rod; a bayonet is formed between the inner walls of the lower clamping block and the upper clamping block, and the size of the drill pipe is matched with the bayonet; the upper end face of the lower clamping block is rotationally connected with the lower end face of the upper clamping block through a hinge; the lower end of the lower clamping block and the upper end of the upper clamping block are respectively provided with a clamping block; the upper end of the upper clamping block is connected with a pull rod, and the surface of the pull rod is provided with a cotton sleeve; the surfaces of the locking block and the clamping block are provided with through holes, threaded rods are arranged in the through holes, and nuts are arranged at two ends of the threaded rods;

when the drill pipe and the drill rod are required to be carried, a user firstly sleeves the first locking ring and the second locking ring on the surface of the drill pipe, a proper position is selected between the drill bit and the connector according to different product sizes, when the drill rod is required to be fixed, the user firstly aligns the clamping blocks at the lower ends of the symmetrical lower clamping blocks with the through holes of the locking blocks arranged at the lower ends of the first locking ring and the second locking ring, firstly passes the threaded rod through the through holes of the locking blocks and the clamping blocks at the lower ends, sleeves the nuts at the two ends of the threaded rod and twists the nuts and the outer walls of the clamping blocks to be in a non-contact state, namely, at the moment, the lower clamping blocks, the upper clamping blocks, the outer walls of the first locking ring and the second locking ring are in clearance fit, so that the upper clamping blocks can be conveniently opened and closed; then a user holds the cotton sleeve on the surface of the pull rod to pull up the upper clamping block, opening and closing the upper clamping block through the hinge, opening the upper clamping block, changing the annular shape of the clamping opening at the moment into a semi-annular shape, putting a drill rod to be conveyed into the clamping opening, finally aligning the clamping blocks at the upper ends of the symmetrical upper clamping blocks with the through holes of the first locking ring or the second locking ring, so that the clamping opening is closed to be in an annular structure, and the drill rod is clamped in the clamping opening. Thereby can fix first lock ring, second lock ring at the surface of drill pipe, simultaneously, can also fix last fixture block and lower fixture block at the surface of first lock ring or second lock ring, thereby can prevent that last fixture block upset, avoid the condition that the drilling rod from the inside roll-off of bayonet socket to appear, and then, through locking device and clamping device's cooperation, locking device can lock fixedly by the drill pipe, clamping device can be with the drilling rod locking fix at the lateral wall of drill pipe, thereby be convenient for the carrier carry fast to drill pipe and with drill pipe complex many drilling rods, thereby current drilling rod or drill pipe only can singly carry, the transport is inconvenient, and the phenomenon of inefficiency has been solved.

Preferably, the locking device further comprises a squeezing ring, an elastic cavity ring and a positioning clamping block; the outer surfaces of the locking blocks which are symmetrically arranged on the upper end surface and the lower end surface are provided with countersunk holes, and extrusion rings are slidably arranged in the countersunk holes; an elastic cavity ring is arranged between the inner side surface of the extrusion ring and the counter bore; the inner parts of the first locking ring and the second locking ring are provided with flow guide cavities which are communicated into the elastic cavity ring through flow guide grooves; positioning grooves are symmetrically formed in the outer side surfaces of the first locking ring and the second locking ring, and positioning clamping blocks are connected in the positioning grooves in a sliding mode through elastic hoses; the outer wall of the elastic hose is sleeved with a spring, and the elastic hose is communicated with the diversion trench; positioning clamping grooves are symmetrically formed in the inner cavity walls of the lower clamping block and the upper clamping block, and are aligned with the positioning grooves; an elastic extrusion piece is arranged on the outer wall of the extrusion ring, and the other end of the elastic extrusion piece is in extrusion contact with the inner side surface of the clamping block; the elastic cavity ring and the inside of the diversion cavity are filled with hydraulic oil;

when the locking device is in operation, the clamping blocks which are vertically symmetrical are aligned with the locking blocks, at the moment, the outer end parts of the elastic extrusion pieces are in contact with the inner side walls of the clamping blocks, when the nut continuously rotates to extrude the extrusion clamping blocks, the clamping blocks extrude the extrusion ring through the elastic extrusion pieces, so that the extrusion ring can move towards the inside of the countersunk holes, the extrusion ring can extrude the elastic cavity ring, hydraulic oil in the elastic cavity ring enters the flow guide cavity through the flow guide grooves, hydraulic oil in the flow guide cavity can enter the elastic hose, the elastic hose stretches to drive the positioning clamping blocks to incompletely slide out of the positioning grooves, at the moment, the spring sleeved on the elastic hose is in a stretching state, and the sliding-out parts of the positioning clamping blocks can slide into the positioning clamping grooves, so that a plurality of positioning clamping blocks can be connected to the lower clamping blocks, the upper clamping blocks and the inner walls between the first locking ring and the second locking ring, the lower clamping blocks can play a role in supporting the pulling force, and the upper clamping blocks can effectively prevent the clamping rods from directly affecting the service life of the threaded rod and further affecting the locking device due to the fact that the vertical downward pulling force of the pulling rod moves up and the drilling rod is used for the threaded rod; when dismantling drilling rod and drill pipe locking device and chucking device, the user reverse rotation nut makes its block break away from the extrusion to the elasticity extrusion piece to make the extrusion ring slide to the counter bore outside under the elasticity pulling force of the spring of elasticity hose outer wall cup joint and the spring elasticity thrust of elasticity cavity ring outer wall cup joint, thereby make the pulling force of extrusion ring and the compressive force of location fixture block can be with the inside hydraulic oil of elasticity hose through guiding gutter and guiding gutter leading-in to the inside of tensile expanded elasticity cavity ring, thereby make the location fixture block can shrink in the constant head tank, be convenient for separate locking device and chucking device.

Preferably, the elastic extrusion is provided in a sleeve shape, and the sleeve-shaped elastic extrusion comprises a metal ring and an elastic corrugated pipe; the sleeve-shaped elastic extrusion piece slides the sleeve piece on the outer wall of the threaded rod; the inner side wall of the clamping block is provided with a positioning hole which is aligned with the counter sunk hole; the countersunk holes and the positioning holes are coaxial with the through holes; the metal rings are fixed at the two ends of the elastic corrugated pipe, the metal rings at one end of the elastic corrugated pipe are connected with the extrusion rings, and the metal rings at the other end of the elastic corrugated pipe are inserted into the positioning holes; during operation, be the elastic corrugated pipe in the middle of the elastic extrusion piece both ends that set up are the metal ring, the extrusion force of card block can lead to the elastic corrugated pipe to produce the compression first, when the elastic corrugated pipe compression reaches maximum limit, the continuation of nut twists reverse the elastic extrusion piece after can compressing and extrudees the extrusion ring, thereby be convenient for extrude the ring and can remove, and the elastic extrusion piece after compressing can play elastic buffer's effect between card block and locking piece, effectively prevent when drilling rod and drill pipe produce when rocking in the transportation, and because the threaded rod is inserted in the through-hole, and non-threaded connection, thereby lead to producing the phenomenon of rocking or producing the displacement between card block and the locking piece, thereby influence the stable connection between chucking device and the locking device.

Preferably, an annular cavity is formed in the elastic corrugated pipe, and a spiral spring with a square cross section is sleeved in the annular cavity; during operation, the inside cross-section that sets up of elastic bellows is square coil spring, when elastic bellows received the metal ring compression at both ends, the metal ring can be first to compressing square coil spring of cross-section for square coil spring can be at elastic bellows internal contraction, the coincide forms stereoplasm ring cover between the square round of messenger coil spring, thereby improve elastic bellows's intensity and rigidity, effectively prevent because elastic bellows compression volume is too big and produce the phenomenon of deformation, thereby influence the steady extrusion of elastic extrusion piece to the extrusion ring.

Preferably, the inner surfaces of the first locking ring and the second locking ring are in sliding connection with the outer side of the drill pipe, and the sizes of the first locking ring and the second locking ring are the same; during operation, the first locking ring and the second locking ring are sleeved on the surface of the drill pipe, and meanwhile, according to different product sizes, the positions of the first locking ring and the second locking ring can be adjusted between the drill bit and the connector, so that the drill pipe with different sizes can be suitable for.

Preferably, the upper end of the upper clamping block is connected with a pull rod, and the surface of the pull rod is provided with a cotton sleeve; during operation, pulling the pull rod can conveniently pull up the upper clamping block, and the condition that the palm is injured due to frequent friction between the hand and the pull rod can be avoided through setting up the cotton sleeve.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the matching of the locking device and the clamping device, the locking device can lock and fix the drill pipe, and the clamping device can lock and fix the drill pipe on the side wall of the drill pipe, so that a carrier can conveniently and rapidly carry the drill pipe and a plurality of drill pipes matched with the drill pipe, and the problems that the existing drill pipe or drill pipe can only be carried singly, the carrying is inconvenient and the efficiency is low are solved.

2. According to the invention, through the cooperation of the extrusion ring and the positioning clamping blocks, the positioning clamping blocks can be connected to the inner walls between the lower clamping block and the upper clamping block and between the first locking ring and the second locking ring, so that the lower clamping block and the upper clamping block can be supported by pulling force, and the phenomenon that when a plurality of users lift the drill rod and the drill pipe through the pull rod, the pulling force of the pull rod on the upper clamping block directly acts on the threaded rod due to the vertically downward gravity of the drill rod is effectively prevented, and the threaded rod is damaged is further caused, so that the service lives of the locking device and the clamping device are influenced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is an assembled view of the clamping device and locking device of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2 in accordance with the present invention;

fig. 4 is an enlarged view of a portion of fig. 3 a in accordance with the present invention.

In the figure: 1. drilling a pipe; 2. a drill bit; 3. a connector; 4. a locking device; 41. a first locking ring; 411. a diversion cavity; 42. a second locking ring; 421. a diversion trench; 422. a positioning groove; 43. a locking block; 431. a countersunk hole; 44. a pressing ring; 45. an elastic cavity ring; 46. positioning a clamping block; 47. an elastic hose; 5. a clamping device; 51. a lower clamping block; 52. a bayonet; 53. a hinge; 54. a clamping block is arranged; 541. positioning clamping grooves; 55. a locking block; 551. positioning holes; 56. a pull rod; 6. an elastic extrusion; 61. a metal ring; 62. an elastic bellows; 621. an annular cavity; 63. a coil spring; 7. a threaded rod; 8. a nut; 9. and a through hole.

Detailed Description

The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.

As shown in fig. 1-4, an oil drill pipe comprises a drill pipe 1, characterized in that: one end of the drill pipe 1 is connected with a drill bit 2, and the other end of the drill pipe 1 is provided with a connector 3; the surface of the drill pipe 1 is provided with a locking device 4, and two sides of the locking device 4 are respectively provided with a clamping device 5; the locking device 4 comprises a first locking ring 41, a second locking ring 42 and a locking block 43; the upper and lower end surfaces of the first locking ring 41 and the second locking ring 42 are provided with locking blocks 43, and the locking blocks 43 are positioned at the end parts of the first locking ring 41 and the second locking ring 42; the two side surfaces of the first locking ring 41 and the second locking ring 42 are connected with clamping devices 5;

the clamping device 5 comprises a lower clamping block 51, a bayonet 52, a hinge 53, an upper clamping block 54, a clamping block 55 and a pull rod 56; a bayonet 52 is formed between the inner walls of the lower clamping block 51 and the upper clamping block 54, and the size of the drill pipe 1 is matched with the bayonet 52; the upper end surface of the lower clamping block 51 is rotationally connected with the lower end surface of the upper clamping block 54 through a hinge 53; the lower end of the lower clamping block 51 and the upper end of the upper clamping block 54 are respectively provided with a clamping block 55; the upper end of the upper clamping block 54 is connected with a pull rod 56, and the surface of the pull rod 56 is provided with a cotton sleeve; the surfaces of the locking block 43 and the clamping block 55 are provided with through holes 9, threaded rods 7 are arranged in the through holes 9, and nuts 8 are arranged at two ends of the threaded rods 7;

when the drill pipe 1 and the drill rod are required to be carried, a user firstly sleeves the first locking ring 41 and the second locking ring 42 on the surface of the drill pipe 1, a proper position is selected between the drill bit 2 and the connector 3 according to different product sizes, when the drill rod is required to be fixed, the user firstly aligns the clamping blocks 55 at the lower ends of the symmetrical lower clamping blocks 51 with the through holes of the locking blocks 43 arranged at the lower ends of the first locking ring 41 and the second locking ring 42, firstly passes the threaded rod 7 through the through holes 9 of the locking blocks 43 and the clamping blocks 55 at the lower ends, sleeves the nuts 8 at the two ends of the threaded rod 7 and screws the nuts to be in a non-contact state with the outer walls of the clamping blocks 55, namely, at the moment, the lower clamping blocks 51, the upper clamping blocks 54 are in clearance fit with the outer walls of the first locking ring 41 and the second locking ring 42, so that the upper clamping blocks 54 are convenient to open and close; then a user holds the cotton sleeve on the surface of the pull rod 6 to pull up the upper clamping block 54, opening and closing the upper clamping block 54 through the hinge 53, opening the upper clamping block 54, changing the clamping opening 52 from ring shape to semi-ring shape, putting the drilling rod to be carried into the clamping opening 52, finally aligning the clamping block 55 at the upper end of the symmetrical upper clamping block 54 with the through hole 9 of the locking block 43 arranged at the upper end of the first locking ring 41 or the second locking ring 42, so that the clamping opening 52 is closed to be in an annular structure, and the drilling rod is clamped in the clamping opening 52, and because clamping devices 5 are arranged at two sides of the locking device 4, three drilling rods can be carried simultaneously, then the drilling rod 7 passes through the locking block 43 at the upper end and the through hole 9 of the clamping block 55, and the nuts 8 sleeved on the threaded rods 7 at the upper end and the lower end are synchronously screwed, so that the nuts 8 are pressed and attached to the outer wall of the clamping block 55; thereby can fix first locking ring 41, second locking ring 42 at the surface of drill pipe 1, simultaneously, can also fix last fixture block 54 and lower fixture block 51 at the surface of first locking ring 41 or second locking ring 42, thereby can prevent that last fixture block 54 from overturning, avoid the condition that the drilling rod from the inside roll-off of bayonet socket 52 to appear, and then, through locking device 4 and clamping device 5's cooperation, locking device 4 can lock fixedly at the lateral wall of drill pipe 1 with the drilling rod, clamping device 5 can lock fixedly at the lateral wall of drill pipe 1, thereby be convenient for the carrier carries fast to drill pipe 1 and with drill pipe 1 complex many drilling rods, thereby current drilling rod or drill pipe 1 can only singly carry, the transport is inconvenient, and the phenomenon of inefficiency has been solved.

As an embodiment of the present invention, the locking device 4 further includes a compression ring 44, an elastic cavity ring 45, and a positioning block 46; the outer surface of the locking block 53 symmetrically arranged on the upper and lower end surfaces is provided with a counter bore 431, and the inside of the counter bore 431 is slidably provided with a squeezing ring 44; an elastic cavity ring 45 is arranged between the inner side surface of the extrusion ring 44 and the counter bore 431; a diversion cavity 411 is formed in the first locking ring 41 and the second locking ring 42, and the diversion cavity 411 is communicated into the elastic cavity ring 45 through a diversion trench 421; positioning grooves 422 are symmetrically formed on the outer side surfaces of the first locking ring 41 and the second locking ring 42, and positioning clamping blocks 46 are connected in the positioning grooves 422 in a sliding manner through elastic hoses 47; the outer wall of the elastic hose 47 is sleeved with a spring, and the elastic hose 47 is communicated with the diversion trench 421; positioning clamping grooves 541 are symmetrically formed in the inner cavity walls of the lower clamping block 51 and the upper clamping block 54, and the positioning clamping grooves 541 are aligned with the positioning grooves 422; an elastic extrusion piece 6 is arranged on the outer wall of the extrusion ring 44, and the other end of the elastic extrusion piece 6 is in extrusion contact with the inner side surface of the clamping block 55; the elastic cavity ring 45 and the diversion cavity 411 are filled with hydraulic oil;

when the locking block 55 and the locking block 53 which are vertically symmetrical are aligned in operation, at the moment, the outer end part of the elastic extrusion piece 6 is in contact with the inner side wall of the locking block 55, when the nut 8 continuously rotates to extrude the extrusion locking block 55, at the moment, the locking block 55 extrudes the extrusion ring 44 through the elastic extrusion piece 6, so that the extrusion ring 44 can move towards the inside of the counter bore 431, the extrusion ring 44 can extrude the elastic cavity ring 45, hydraulic oil in the elastic cavity ring 45 enters the guide cavity 411 through the guide groove 421, hydraulic oil in the guide cavity 411 enters the elastic hose 47, the elastic hose 47 stretches to drive the positioning clamping block 46 to incompletely slide out from the inside of the positioning groove 422, at this time, the spring sleeved on the elastic hose 47 is in a stretched state, and the sliding part of the positioning clamping block 46 slides into the positioning clamping groove 541, so that a plurality of positioning clamping blocks 46 can be connected to the inner walls between the lower clamping block 51 and the upper clamping block 54 and the first locking ring 41 and the second locking ring 42, and thus the lower clamping block 51 and the upper clamping block 54 can be supported by pulling force, and the situation that when a plurality of users lift the drill rod and the drill pipe 1 through the pull rod 56, the pull rod 56 directly acts on the threaded rod 7 due to the vertically downward gravity of the drill rod, and the threaded rod 7 is damaged is caused, so that the service lives of the locking device 4 and the clamping device 5 are influenced; when the drill rod, the locking device 4 of the drill pipe 1 and the clamping device 5 are required to be dismounted, a user reversely rotates the nut 8 to enable the clamping block 55 to be separated from the extrusion of the elastic extrusion piece 6, so that the extrusion ring 44 slides towards the outside of the counter bore 431 under the elastic tension of the spring sleeved on the outer wall of the elastic hose 47 and the elastic thrust of the spring sleeved on the outer wall of the elastic cavity ring 45, and hydraulic oil in the elastic hose 47 can be led into the elastic cavity ring 45 which stretches and expands through the guide groove 421 and the guide groove 421 under the tensile force of the extrusion ring 44 and the compression force of the positioning clamping block 46, and the positioning clamping block 46 can be contracted into the positioning groove 422 to facilitate the separation of the locking device 4 and the clamping device 5.

As one embodiment of the present invention, the elastic pressing member 6 is provided in a sleeve shape, and the sleeve-shaped elastic pressing member 6 includes a metal ring 61 and an elastic bellows 62; the sleeve-shaped elastic extrusion piece 6 slides the sleeve piece on the outer wall of the threaded rod 7; the inner side wall of the locking block 55 is provided with a positioning hole 551, and the positioning hole 551 is aligned with the counter bore 431; the counter bore 431 and the positioning hole 551 are coaxial with the through hole 9; the metal rings 61 are fixed at two ends of the elastic corrugated tube 62, the metal ring 61 at one end of the elastic corrugated tube 62 is connected with the extrusion ring 44, and the metal ring 61 at the other end of the elastic corrugated tube 62 is inserted into the positioning hole 551; during operation, the elastic extrusion piece 6 both ends that set up are the metal ring 61 in the middle of be the elastic bellows 62, the extrusion force of block 55 can lead to the elastic bellows 62 to produce the compression at first, when the elastic bellows 62 compresses to the maximum limit, the continued torsion of nut 8 can extrude extrusion ring 44 through the elastic extrusion piece 6 after the compression, thereby be convenient for extrude ring 44 can remove, and the elastic extrusion piece 6 after the compression can play the elastic buffering's effect between block 55 and locking piece 43, effectively prevent when drilling rod and drill pipe 1 produce when rocking in the transportation, and because threaded rod 7 is inserted in through-hole 9, and non-threaded connection, thereby produce the phenomenon of rocking or producing the displacement between block 55 and the locking piece 43, thereby influence the stable connection between chucking device 5 and the locking device 4.

As an embodiment of the present invention, an annular cavity 621 is formed inside the elastic bellows 62, and a coil spring 63 with a square cross section is sleeved inside the annular cavity 621; during operation, the section that the inside of elastic bellows 62 set up is square coil spring 63, when elastic bellows 62 received the metal ring 61 compression at both ends, metal ring 61 can be at first compress square coil spring 63 in cross-section for square coil spring 63 can shrink in elastic bellows 62, coincide between the square round of messenger coil spring 63 forms the stereoplasm ring cover, thereby improve the intensity and the rigidity of elastic bellows 62, effectively prevent because the too big phenomenon that produces the deformation of elastic bellows 62 compression volume, thereby influence the steady extrusion of elastic extrusion piece 6 to extrusion ring 44.

As an embodiment of the invention, the inner surfaces of the first locking ring 41 and the second locking ring 42 are in sliding connection with the outer side of the drill pipe 1, and the sizes of the first locking ring 41 and the second locking ring 42 are the same; during operation, the first locking ring 41 and the second locking ring 42 are sleeved on the surface of the drill pipe 1, and meanwhile, the positions of the first locking ring 41 and the second locking ring 42 can be adjusted between the drill bit 2 and the connector 3 according to different product sizes, so that drill pipes with different sizes can be suitable.

As an embodiment of the present invention, the upper end of the upper clamping block 54 is connected with a pull rod 56, and the surface of the pull rod 56 is provided with a cotton sleeve; in operation, pulling the pull rod 56 can conveniently pull up the upper clamping block 54, and the situation that the palm is injured due to frequent friction between the hand and the pull rod 6 can be avoided by arranging the cotton sleeve.

The working procedure is as follows:

The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Petroleum drill rod, comprising a drill pipe (1), characterized in that: one end of the drill pipe (1) is connected with a drill bit (2), and the other end of the drill pipe (1) is provided with a connector (3); the surface of the drill pipe (1) is provided with a locking device (4), and two sides of the locking device (4) are respectively provided with a clamping device (5); the locking device (4) comprises a first locking ring (41), a second locking ring (42) and a locking block (43); the upper end surfaces and the lower end surfaces of the first locking ring (41) and the second locking ring (42) are respectively provided with a locking block (43), and the locking blocks (43) are positioned at the end parts of the first locking ring (41) and the second locking ring (42); the two side surfaces of the first locking ring (41) and the second locking ring (42) are connected with clamping devices (5);

the clamping device (5) comprises a lower clamping block (51), a bayonet (52), a hinge (53), an upper clamping block (54), a clamping block (55) and a pull rod (56); a bayonet (52) is formed between the inner walls of the lower clamping block (51) and the upper clamping block (54), and the size of the drill pipe (1) is matched with the bayonet (52); the upper end face of the lower clamping block (51) is rotationally connected with the lower end face of the upper clamping block (54) through a hinge (53); the lower end of the lower clamping block (51) and the upper end of the upper clamping block (54) are respectively provided with a clamping block (55); the upper end of the upper clamping block (54) is connected with a pull rod (56), and a cotton sleeve is arranged on the surface of the pull rod (56); the surface of the locking block (43) and the surface of the clamping block (55) are provided with through holes (9), threaded rods (7) are arranged in the through holes (9), and nuts (8) are arranged at two ends of each threaded rod (7);

the locking device (4) further comprises a squeezing ring (44), an elastic cavity ring (45) and a positioning clamping block (46); the outer surface of the locking block (53) symmetrically arranged on the upper end surface and the lower end surface is provided with a countersunk hole (431), and a squeezing ring (44) is slidably arranged in the countersunk hole (431); an elastic cavity ring (45) is arranged between the inner side surface of the extrusion ring (44) and the counter bore (431); a diversion cavity (411) is formed in the first locking ring (41) and the second locking ring (42), and the diversion cavity (411) is communicated into the elastic cavity ring (45) through a diversion trench (421); positioning grooves (422) are symmetrically formed in the outer side surfaces of the first locking ring (41) and the second locking ring (42), and positioning clamping blocks (46) are connected in the positioning grooves (422) in a sliding mode through elastic hoses (47); the outer wall of the elastic hose (47) is sleeved with a spring, and the elastic hose (47) is communicated with the diversion trench (421); positioning clamping grooves (541) are symmetrically formed in the inner cavity walls of the lower clamping block (51) and the upper clamping block (54), and the positioning clamping grooves (541) are aligned with the positioning grooves (422); an elastic extrusion piece (6) is arranged on the outer wall of the extrusion ring (44), and the other end of the elastic extrusion piece (6) is in extrusion contact with the inner side surface of the clamping block (55); the elastic cavity ring (45) and the diversion cavity (411) are filled with hydraulic oil.

2. A petroleum drill pipe according to claim 1, wherein: the elastic extrusion (6) is arranged in a sleeve shape, and the sleeve-shaped elastic extrusion (6) comprises a metal ring (61) and an elastic corrugated pipe (62); the sleeve-shaped elastic extrusion piece (6) is sleeved on the outer wall of the threaded rod (7) in a sliding manner; the inner side wall of the clamping block (55) is provided with a positioning hole (551), and the positioning hole (551) is aligned with the counter bore (431); the counter bore (431) and the positioning hole (551) are coaxial with the through hole (9); the metal rings (61) are fixed at the two ends of the elastic corrugated pipe (62), the metal rings (61) at one end of the elastic corrugated pipe (62) are connected with the extrusion ring (44), and the metal rings (61) at the other end of the elastic corrugated pipe (62) are inserted into the positioning holes (551).

3. A petroleum drill pipe according to claim 2, wherein: an annular cavity (621) is formed in the elastic corrugated pipe (62), and a spiral spring (63) with a square cross section is sleeved in the annular cavity (621).

4. A petroleum drill pipe according to claim 1, wherein: the inner surfaces of the first locking ring (41) and the second locking ring (42) are in sliding connection with the outer side of the drill pipe (1), and the sizes of the first locking ring (41) and the second locking ring (42) are the same.

5. A petroleum drill pipe according to claim 1, wherein: the upper end of the upper clamping block (54) is connected with a pull rod (56), and a cotton sleeve is arranged on the surface of the pull rod (56).