CN118065770A - Drilling tool connecting nipple - Google Patents
Drilling tool connecting nipple Download PDFInfo
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- CN118065770A CN118065770A CN202211413769.7A CN202211413769A CN118065770A CN 118065770 A CN118065770 A CN 118065770A CN 202211413769 A CN202211413769 A CN 202211413769A CN 118065770 A CN118065770 A CN 118065770A
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- ball head
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- drilling tool
- joint
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- 238000005553 drilling Methods 0.000 title claims abstract description 82
- 210000002445 nipple Anatomy 0.000 title claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims description 25
- 230000009471 action Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The invention belongs to the technical field of oilfield drilling and discloses a drilling tool connecting nipple. The drilling tool connecting nipple comprises an upper joint, a lower joint, a connecting body, a first locking assembly, a second locking assembly and a rolling piece; the inner part of the upper joint is provided with a first spherical groove, and the wall surface of the first spherical groove is provided with a first limit groove; the lower joint is internally provided with a second spherical groove, and the wall surface of the second spherical groove is provided with a second limit groove; the connecting body comprises a straight pipe section, a first ball head section and a second ball head section which are respectively connected with two ends of the straight pipe section, the first ball head section is embedded in the first spherical groove, and the first limiting groove is used for limiting the first ball head section to rotate along the circumferential direction; the second ball head section is embedded in the second spherical groove, and the second limiting groove is used for limiting the second ball head section to rotate along the circumferential direction; the rolling element is arranged on the outer walls of the upper joint and the lower joint. The drilling tool connecting nipple reduces the overall rigidity of the underground drilling tool, so that the drilling tool can pass through the ultra-high inclination well section more flexibly.
Description
Technical Field
The invention relates to the technical field of oilfield drilling, in particular to a drilling tool connecting nipple.
Background
With the increasing demand of people for energy, the exploration force of oil fields is gradually increased, and the drilling operation of high-inclination oil and gas wells is also increasingly carried out. When ultra-high inclination drilling is carried out, one or more sections of flexible drill pipes are usually required to be added in the middle of the drilling tool, and the flexible drill pipes can generate certain flexible deformation during drilling so as to reduce the rigidity of the whole drilling tool, so that the drilling tool has better trafficability to extend into a high inclination well section; however, the flexible drill rod is made of steel with better flexibility, the rigidity of the flexible drill rod is reduced very limited, and the flexible drill rod is in a high-pressure torsion state for a long time, so that the flexible drill rod is easy to break, and drilling accidents are caused.
The existing flexible short joint of the drilling tool is as the single joint flexible short joint provided in the invention patent with the application number of 201911078912.X, and the spherical shaft and the spherical sleeve are arranged in the joint flexible assembly, so that the upper section and the lower section of the joint flexible assembly can be axially bent, meanwhile, the relative rotation of the upper section and the lower section of the joint flexible assembly can be realized, the rigidity of the drilling tool is reduced, and the drilling tool is prevented from being blocked in the lifting and lowering processes. But this single joint flexible nipple has the following problems:
1. The bending degree and flexibility of the single joint flexible nipple are limited, and the single joint flexible nipple cannot pass through the ultra-high inclination well section well;
2. The friction resistance between the device and the well wall is large, the trafficability is poor, and part of torque is counteracted by the large friction resistance, so that the drilling efficiency is reduced.
Disclosure of Invention
The invention aims to provide a drilling tool connecting nipple so as to reduce the overall rigidity of a downhole drilling tool and enable the drilling tool to pass through an ultra-high inclination well section more flexibly.
To achieve the purpose, the invention adopts the following technical scheme:
A drill connection sub comprising:
the upper joint is connected with the upper section drilling tool, a first cavity and a first spherical groove which are communicated are formed in the upper joint, and a first limit groove is formed in the wall surface of the first spherical groove;
The lower joint is connected with a lower section drilling tool, a second cavity and a second spherical groove which are communicated are formed in the lower joint, and a second limit groove is formed in the wall surface of the second spherical groove;
The connecting body comprises a straight pipe section, a first ball head section and a second ball head section, wherein the first ball head section and the second ball head section are respectively connected to two ends of the straight pipe section, the straight pipe section is provided with a connecting channel, the first ball head section is provided with a first channel, the first channel is communicated with the first cavity, the second ball head section is provided with a second channel, the second channel is communicated with the second cavity, and the first channel is communicated with the second channel through the connecting channel; the first ball head segment is embedded in the first spherical groove and is matched with the spherical surface of the first spherical groove, a first limiting part is arranged on the first ball head segment, the first limiting part is positioned in the first limiting groove, and the first limiting groove is used for limiting the first ball head segment to rotate along the circumferential direction; the second ball head section is embedded in the second spherical groove and is matched with the spherical surface of the second spherical groove, a second limiting part is arranged on the second ball head section, the second limiting part is positioned in the second limiting groove, and the second limiting groove is used for limiting the second ball head section to rotate along the circumferential direction;
The first locking assembly comprises a first locking piece, the first locking piece is detachably connected with the upper joint, and the first locking piece is abutted against the first ball head section;
the second locking assembly comprises a second locking piece, the second locking piece is detachably connected with the lower joint, and the second locking piece is abutted against the second ball head section;
the rolling piece is arranged on the outer walls of the upper joint and the lower joint, and the rolling piece is abutted against the well wall.
Preferably, the first locking assembly further comprises a first connecting piece, and the first locking piece is detachably connected with the upper joint through the first connecting piece; and/or, the second locking assembly further comprises a second connecting piece, and the second locking piece is detachably connected with the lower joint through the second connecting piece.
Preferably, the first connector is capable of breaking under the action of external force to disengage the upper connector from the connector; and/or the second connecting piece can be broken under the action of external force so as to enable the connecting body to be separated from the lower joint.
Preferably, a plurality of mounting grooves are formed in the outer walls of the upper joint and the lower joint, at least one rolling element is clamped in each mounting groove, the diameter of each rolling element is larger than the depth of each mounting groove, and the part, extending out of each mounting groove, of each rolling element is abutted to the well wall.
Preferably, the mounting groove is spiral or linear.
Preferably, the drilling tool connection nipple further comprises two first sealing elements, one of the first sealing elements is arranged between the first ball head section and the first spherical groove, and the other first sealing element is arranged between the second ball head section and the second spherical groove.
Preferably, the drilling tool connection nipple further comprises two second sealing elements, one of the second sealing elements is arranged between the upper joint and the first locking element, and the other second sealing element is arranged between the lower joint and the second locking element.
Preferably, the outer diameter of the straight pipe section is smaller than the outer diameters of the upper joint and the lower joint.
Preferably, the first limiting part is movably arranged in the first limiting groove, and the second limiting part is movably arranged in the second limiting groove.
Preferably, the rolling elements are balls or cylinders.
The invention has the beneficial effects that:
According to the drilling tool connecting nipple, the upper joint, the lower joint and the connecting body are provided with the channels which are communicated with each other, and the channels are communicated with the pipelines in the upper section drilling tool and the lower section drilling tool, so that drilling fluid can smoothly pass through the drilling tool connecting nipple to realize normal drilling operation; because the two ends of the straight pipe section of the connecting body are respectively connected with the first ball head section and the second ball head section, the first ball head section and the second ball head section are respectively matched with the first spherical groove in the upper joint and the second spherical groove in the lower joint, the upper joint and the lower joint are respectively rotated at any angle relative to the connecting body, the overall rigidity of the underground drilling tool is reduced, and the underground drilling tool can pass through the ultra-high-inclination well section more flexibly; the first limiting part is positioned in the first limiting groove and can limit the first ball head section to rotate along the circumferential direction, and the second limiting part is positioned in the second limiting groove and can limit the second ball head section to rotate along the circumferential direction, so that when the upper section drilling tool drives the upper joint to rotate, the upper joint can drive the lower joint and the lower section drilling tool to rotate through the connecting body, and the drilling pressure is effectively transmitted to the drill bit of the lower section drilling tool; by arranging the first locking piece and the second locking piece, the first ball head section and the second ball head section can be respectively locked in the first spherical groove and the second spherical groove, so that the safety of the drilling tool in the use process of the connecting nipple is improved; because the rolling elements are arranged on the outer side walls of the upper joint and the lower joint and are abutted against the well wall, the friction force between the upper joint and the well wall and between the lower joint and the well wall is reduced, so that the drilling tool is short in connection and can smoothly pass through the well section, and meanwhile, the loss generated by friction with the well wall is effectively reduced, and the drilling efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of a drill connection nipple provided in an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a first ball segment provided in accordance with an embodiment of the invention;
FIG. 3 is a cross-sectional view of a second ball segment provided in accordance with an embodiment of the invention.
In the figure:
1-upper joint; 11-a first cavity; 12-a first limit groove;
2-lower joint; 21-a second cavity; 22-a second limit groove;
a 3-linker; 31-a first bulb section; 311-a first limit part; 312-first channel; 32-a second bulb section; 321-a second limiting part; 322-second channel; 33-straight pipe sections; 331-connection channels;
4-a first locking assembly; 41-a first locking member; 42-first connection;
5-a second locking assembly; 51-a second locking member; 52-a second connector;
6-rolling elements;
7-a first seal;
8-a second seal;
9-mounting groove.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
As shown in fig. 1-3, the present invention provides a tool joint sub, which includes an upper joint 1, a lower joint 2, a connecting body 3, a first locking assembly 4, a second locking assembly 5, and a rolling member 6. The upper joint 1 is connected with an upper section drilling tool, a first cavity 11 and a first spherical groove which are communicated are formed in the upper joint 1, and a first limit groove 12 is formed in the wall surface of the first spherical groove; the lower joint 2 is connected with a lower section drilling tool, a second cavity 21 and a second spherical groove which are communicated are formed in the lower joint 2, and a second limit groove 22 is formed in the wall surface of the second spherical groove; the connecting body 3 comprises a straight pipe section 33, a first ball head section 31 and a second ball head section 32 which are respectively connected to two ends of the straight pipe section 33, the straight pipe section 33 is provided with a connecting channel 331, the first ball head section 31 is provided with a first channel 312, the first channel 312 is communicated with the first cavity 11, the second ball head section 32 is provided with a second channel 322, the second channel 322 is communicated with the second cavity 21, and the first channel 312 is communicated with the second channel 322 through the connecting channel 331; the first ball head segment 31 is embedded in the first spherical groove and is in spherical fit with the first spherical groove, a first limiting part 311 is arranged on the first ball head segment 31, the first limiting part 311 is positioned in the first limiting groove 12, and the first limiting groove 12 is used for limiting the first ball head segment 31 to rotate along the circumferential direction; the second ball head segment 32 is embedded in the second spherical groove and is in spherical fit with the second spherical groove, a second limiting part 321 is arranged on the second ball head segment 32, the second limiting part 321 is located in the second limiting groove 22, and the second limiting groove 22 is used for limiting the second ball head segment 32 to rotate along the circumferential direction. In this embodiment, the upper joint 1, the lower joint 2 and the connecting body 3 are provided with channels which are mutually communicated, and the channels are communicated with the pipelines in the upper section drilling tool and the lower section drilling tool, so that the drilling fluid can smoothly pass through the drilling tool connecting nipple so as to realize normal drilling operation; the two ends of the straight pipe section 33 of the connector 3 are respectively connected with the first ball head section 31 and the second ball head section 32, and the first ball head section 31 and the second ball head section 32 are respectively in spherical fit with the first spherical groove in the upper joint 1 and the second spherical groove in the lower joint 2, so that the upper joint 1 and the lower joint 2 respectively rotate at any angle relative to the connector 3, the overall rigidity of the underground drilling tool is reduced, and the underground drilling tool can pass through the ultra-high-inclination well section more flexibly; two first limiting parts 311 are symmetrically arranged on the first ball head section 31, and the outer surface of each first limiting part 311 is arc-shaped so as to be attached to the first spherical groove, so that the rotation of the first ball head section 31 is better realized; the second ball head section 32 is symmetrically provided with two second limiting parts 321, the outer surface of the second limiting part 321 is arc-shaped, so that the second ball head section can be attached to the second spherical groove, the second ball head section 32 can be better rotated, the first limiting part 311 is positioned in the first limiting groove 12, the first ball head section 31 can be limited to rotate along the circumferential direction, the second limiting part 321 is positioned in the second limiting groove 22, the second ball head section 32 can be limited to rotate along the circumferential direction, and therefore, when the upper section drilling tool drives the upper joint 1 to rotate, the upper joint 1 can drive the lower joint 2 and the lower section drilling tool to rotate through the connecting body 3, and the weight on bit is effectively transferred to a drilling bit of the lower section drilling tool.
The first locking assembly 4 comprises a first locking piece 41, the first locking piece 41 is detachably connected with the upper joint 1, and the first locking piece 41 is abutted against the first ball head section 31; the second locking assembly 5 comprises a second locking member 51, the second locking member 51 being detachably connected to the lower joint 2, the second locking member 51 being in abutment with the second ball end section 32. In this embodiment, the first locking member 41 and the second locking member 51 are both in a ring shape, the outer walls of the rings are detachably connected with the inner walls of the upper joint 1 and the lower joint 2 respectively, the upper end surface of the first locking member 41 abuts against the lower hemispherical surface of the first ball head segment 31, and the lower end surface of the second locking member 51 abuts against the upper hemispherical surface of the second ball head segment 32; through setting up first locking piece 41 and second locking piece 51, can lock first bulb section 31 and second bulb section 32 respectively in first spherical recess and second spherical recess, avoid deviate from in the drilling process, improved the security in this drilling tool connection nipple joint use.
The rolling element 6 is arranged on the outer walls of the upper joint 1 and the lower joint 2, and the rolling element 6 is abutted against the well wall due to the arrangement of the rolling element 6 on the outer side walls of the upper joint 1 and the lower joint 2, so that the friction force between the upper joint 1 and the lower joint 2 and the well wall is reduced, the drilling tool is short in connection, the drilling tool can smoothly pass through a well section, the loss caused by friction with the well wall is effectively reduced, and the drilling efficiency is improved.
Further, the first locking assembly 4 further includes a first connecting member 42, and the first locking member 41 is detachably connected to the upper connector 1 through the first connecting member 42; and/or, the second locking assembly 5 further comprises a second connecting piece 52, and the second locking piece 51 is detachably connected with the lower joint 2 through the second connecting piece 52. In this embodiment, the first connecting member 42 is a pin, and the first connecting member 42 passes through the upper connector 1 and is inserted into the first locking member 41 so as to realize detachable connection between the upper connector 1 and the first locking member 41; in addition, constructors can also set a second connecting piece 52 according to the site construction condition, and similarly, the second connecting piece 52 is a pin, and the lower joint 2 and the second locking piece 51 are detachably connected through the second connecting piece 52.
Specifically, the first connecting piece 42 is capable of breaking under the action of external force to disengage the upper joint 1 from the connecting body 3; and/or the second connection piece 52 can be broken by the action of external force to disengage the connection body 3 from the lower joint 2. In this embodiment, the constructor selects the material of the first connecting piece 42 according to the whole weight of the underground drilling tool, so that the constructor can bear the weight of the underground drilling tool, when the lower drilling tool is blocked and cannot get rid of the trouble in the drilling process, the constructor can pull the upper joint 1 upwards by force, when the pulling force exceeds the maximum value which can be borne by the first connecting piece 42, the first connecting piece 42 breaks automatically to separate the upper joint 1 from the first locking piece 41, so that the upper joint 1 is separated from the lower connecting body 3, and the purpose of protecting the upper drilling tool is achieved; in addition, constructors can select the material of the second connecting piece 52 according to the site construction condition, so that the construction personnel can form a double-disengaging structure in cooperation with the first connecting piece 42, namely, the drilling tool connecting nipple can be broken from the second connecting piece 52 to separate the connecting body 3 from the lower connector 2, so that the connecting body 3 is disengaged from the lower connector 2 below, and the purpose of protecting an upper drilling tool is achieved.
Further, a plurality of mounting grooves 9 are formed in the outer walls of the upper joint 1 and the lower joint 2, at least one rolling element 6 is clamped in each mounting groove 9, the diameter of each rolling element 6 is larger than the depth of each mounting groove 9, and the part of each rolling element 6 extending out of each mounting groove 9 is abutted against a well wall. The rolling element 6 is clamped in the mounting groove 9, so that the rolling element 6 can be stably connected with the upper joint 1 and the lower joint 2; the diameter of the rolling member 6 is larger than the depth of the installation groove 9, so that a portion of the rolling member 6 can protrude into the installation groove 9 to abut against the well wall to increase the passage.
Specifically, the mounting groove 9 is spiral or linear. In the present embodiment, the mounting groove 9 is disposed on the outer walls of the upper joint 1 and the lower joint 2 in a spiral or linear shape in the axial direction; wherein the spiral direction of the installation groove 9 is the same as the steering direction of the drilling tool, so that the friction resistance between the upper joint 1 and the lower joint 2 and the well wall can be further reduced.
Further, the drill connection sub further comprises two first sealing elements 7, wherein one first sealing element 7 is arranged between the first ball head section 31 and the first spherical groove, and the other first sealing element 7 is arranged between the second ball head section 32 and the second spherical groove. In this embodiment, the first sealing member 7 is a circular ring-shaped sealing ring, and since the first sealing member 7 is disposed between the first ball head segment 31 and the first spherical groove and between the second ball head segment 32 and the second spherical groove, liquid can be prevented from seeping out from the first spherical groove and the second spherical groove, and the tightness of the drill connecting nipple is ensured
Specifically, the drill connection nipple further comprises two second sealing elements 8, wherein one second sealing element 8 is arranged between the upper joint 1 and the first locking element 41, and the other second sealing element 8 is arranged between the lower joint 2 and the second locking element 51. In this embodiment, the second sealing member 8 has the same structure as the first sealing member 7, and is a ring-shaped sealing ring, and the second sealing member 8 further improves the sealing effect of the drilling tool connection nipple on the basis of the first sealing member 7.
Further, the outside diameter of the straight pipe section 33 is smaller than the outside diameters of the upper joint 1 and the lower joint 2. In this embodiment, the outer diameter of the straight pipe section 33 is smaller than the outer diameters of the upper joint 1 and the lower joint 2, so that the straight pipe section 33 is prevented from directly contacting the well wall to generate larger friction resistance; in addition, the contact between the straight pipe section 33 and the upper joint 1 and the lower joint 2 can be reduced, the rotation range of the upper joint 1 and the lower joint 2 is enlarged, and the flexibility of the drilling tool connecting nipple joint is improved.
Further, the first limiting portion 311 is movably disposed in the first limiting groove 12, and the second limiting portion 321 is movably disposed in the second limiting groove 22. In the present embodiment, a gap exists between the first limiting portion 311 and the first limiting groove 12 along the circumferential direction, and a gap exists between the second limiting portion 321 and the second limiting groove 22 along the circumferential direction; when the upper drilling tool is started, due to the existence of the gap, the situation that the instantaneous torque is overlarge when the upper joint 1 drives the lower joint 2 through the connector 3 can be avoided, a certain buffer space is provided for torque transmission, and the drilling tool connecting nipple can be effectively protected.
Further, the rolling members 6 are balls or cylinders. In this embodiment, the rolling elements 6 may be steel balls, which can effectively reduce the friction between the upper joint 1, the lower joint 2 and the well wall, and facilitate installation; the rolling elements 6 may also be steel cylinders or other elements capable of free rotation, without limitation.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. The nipple joint is connected to drilling tool, its characterized in that includes:
the upper joint (1), the upper joint (1) is connected with an upper section drilling tool, a first cavity (11) and a first spherical groove are communicated in the upper joint (1), and a first limit groove (12) is formed in the wall surface of the first spherical groove;
The lower joint (2) is connected with a lower section drilling tool, a second cavity (21) and a second spherical groove are communicated in the lower joint (2), and a second limit groove (22) is formed in the wall surface of the second spherical groove;
The connecting body (3), the connecting body (3) comprises a straight pipe section (33) and a first ball head section (31) and a second ball head section (32) which are respectively connected to two ends of the straight pipe section (33), the straight pipe section (33) is provided with a connecting channel (331), the first ball head section (31) is provided with a first channel (312), the first channel (312) is communicated with the first cavity (11), the second ball head section (32) is provided with a second channel (322), the second channel (322) is communicated with the second cavity (21), and the first channel (312) is communicated with the second channel (322) through the connecting channel (331); the first ball head section (31) is embedded in the first spherical groove and is in spherical fit with the first spherical groove, a first limiting part (311) is arranged on the first ball head section (31), the first limiting part (311) is positioned in the first limiting groove (12), and the first limiting groove (12) is used for limiting the first ball head section (31) to rotate along the circumferential direction; the second ball head section (32) is embedded in the second spherical groove and is in spherical fit with the second spherical groove, a second limiting part (321) is arranged on the second ball head section (32), the second limiting part (321) is positioned in the second limiting groove (22), and the second limiting groove (22) is used for limiting the second ball head section (32) to rotate along the circumferential direction;
the first locking assembly (4), the first locking assembly (4) comprises a first locking piece (41), the first locking piece (41) is detachably connected with the upper joint (1), and the first locking piece (41) is abutted against the first ball head section (31);
The second locking assembly (5), the second locking assembly (5) comprises a second locking piece (51), the second locking piece (51) is detachably connected with the lower joint (2), and the second locking piece (51) is abutted against the second ball head section (32);
the rolling piece (6), the rolling piece (6) is arranged on the outer walls of the upper joint (1) and the lower joint (2), and the rolling piece (6) is abutted against the well wall.
2. The drill connection sub according to claim 1, characterized in that the first locking assembly (4) further comprises a first connection piece (42), the first locking piece (41) being detachably connected to the upper joint (1) by means of the first connection piece (42); and/or, the second locking assembly (5) further comprises a second connecting piece (52), and the second locking piece (51) is detachably connected with the lower joint (2) through the second connecting piece (52).
3. Drilling tool connection sub according to claim 2, characterized in that the first connection piece (42) is breakable under the effect of external force to disengage the upper joint (1) from the connection body (3); and/or the second connecting piece (52) can be broken under the action of external force so as to separate the connecting body (3) from the lower joint (2).
4. The drilling tool connecting nipple according to claim 1, characterized in that a plurality of mounting grooves (9) are formed in the outer walls of the upper joint (1) and the lower joint (2), at least one rolling element (6) is clamped in each mounting groove (9), the diameter of each rolling element (6) is larger than the depth of each mounting groove (9), and the portion, extending out of each mounting groove (9), of each rolling element (6) is abutted against the well wall.
5. Drilling tool connection sub according to claim 4, characterized in that the mounting groove (9) is helical or rectilinear.
6. The drill connection sub according to claim 1, further comprising a first seal (7), two of the first seals (7), one of the first seals (7) being arranged between the first ball head section (31) and the first spherical groove and the other of the first seals (7) being arranged between the second ball head section (32) and the second spherical groove.
7. The drill connection sub according to claim 6, characterized in that it further comprises second sealing elements (8), two of which second sealing elements (8), one of which second sealing elements (8) is arranged between the upper joint (1) and the first locking element (41) and the other of which second sealing element (8) is arranged between the lower joint (2) and the second locking element (51).
8. Drilling tool connection sub according to claim 1, characterized in that the outer diameter of the straight pipe section (33) is smaller than the outer diameters of the upper joint (1) and the lower joint (2).
9. The drilling tool connection sub according to claim 1, wherein the first limit portion (311) is movably arranged in the first limit groove (12), and the second limit portion (321) is movably arranged in the second limit groove (22).
10. Drilling tool connection sub according to any of claims 1-9, wherein the rolling elements (6) are balls or cylinders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211413769.7A CN118065770A (en) | 2022-11-11 | 2022-11-11 | Drilling tool connecting nipple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211413769.7A CN118065770A (en) | 2022-11-11 | 2022-11-11 | Drilling tool connecting nipple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118065770A true CN118065770A (en) | 2024-05-24 |
Family
ID=91095993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211413769.7A Pending CN118065770A (en) | 2022-11-11 | 2022-11-11 | Drilling tool connecting nipple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118065770A (en) |
-
2022
- 2022-11-11 CN CN202211413769.7A patent/CN118065770A/en active Pending
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