CN210829111U - Anti-back-off drill collar - Google Patents
Anti-back-off drill collar Download PDFInfo
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- CN210829111U CN210829111U CN201921576286.2U CN201921576286U CN210829111U CN 210829111 U CN210829111 U CN 210829111U CN 201921576286 U CN201921576286 U CN 201921576286U CN 210829111 U CN210829111 U CN 210829111U
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- drill collar
- hole
- bolt
- locking
- joint
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Abstract
The utility model discloses a prevent back-off drill collar, adopt the drill collar of two circular bead threaded connection including two joint portions, two joint portions are including the drill collar male joint that has the external screw thread, internal screw thread drill collar female joint has, two drill collars pass through drill collar female joint and drill collar male joint threaded connection, four shoulder holes have been seted up to the outer circumference equipartition in drill collar female joint and drill collar male joint threaded connection department, every shoulder hole all has the through hole and the locking connection hole of intercommunication, the locking connection hole is seted up on the drill collar female joint, and be equipped with the internal thread on the locking connection hole, the through hole communicates with the locking connection hole and runs through drill collar female joint and drill collar male joint threaded connection department. The utility model discloses be connected drill collar female joint and drill collar male joint once more, when reversing appears in the drill collar, because the fixed pin has fixed the upper and lower joint of drill collar, make its unable take place the pine of screw thread and take off the phenomenon to the effect of anticreep has been played.
Description
Technical Field
The utility model belongs to the technical field of the rig, concretely relates to anti-back-off drill collar.
Background
In the actual movement process of the drill stem in the underground well, due to the reasons of complex underground working environment, uneven stress and the like, additional torque is easily generated, so that the drill stem also has revolution or reverse movement while rotating, and the drill stem is easily tripped; the threaded connection is subjected to alternating loads and vibration loads, and even if the threaded connection is not subjected to the action of the shackle torque, pretightening force reduction or thread loosening can occur. In this case, a drilling accident or fish falling may be finally caused. And with the continuous development of the drilling process, special process wells or workover operations appear, and the drill string is required to realize the reverse operation. The drill collar is used as an important component of a drill string, plays a role in increasing the pressure of the drill string, transmitting torque and conveying drilling fluid, and is easy to trip to cause accidents when the common drill collar is overturned.
Disclosure of Invention
In order to solve the problem, the utility model discloses a prevent reverse-buckling drill collar aims at solving among the prior art drill collar and realizes very easily causing the dropout and the emergence accident scheduling problem when reversing.
In order to achieve the purpose, the utility model adopts the technical scheme that:
an anti-back-off drill collar comprises two joint parts, namely a drill collar with double circular shoulders in threaded connection, wherein the two joint parts comprise a drill collar male joint with external threads and a drill collar female joint with internal threads; the bolt is characterized in that a bolt, a spring, a fixed pin, a locking rubber pad and a locking cover are sequentially arranged in the stepped hole, a screwing groove is formed in the end part of a bolt rod of the bolt, a bolt head of the bolt is in contact with the bottom of the through hole, the spring is sleeved on the bolt rod of the bolt, a connecting stepped hole is formed in the middle of the fixed pin and comprises a sleeved hole and an internal threaded hole, the sleeved hole and the internal threaded hole are communicated with one end and the other end of the fixed pin, the fixed pin and the through hole are in clearance fit connection and are installed in the through hole, the internal threaded hole of the fixed pin is in threaded connection with the bolt rod of the bolt, meanwhile, the sleeved hole of the fixed pin is sleeved with the bolt head of the bolt, and the; the locking rubber gasket is arranged in the locking connecting hole, an internal thread is arranged in the middle of the locking cover, an external thread is arranged on the outer circumference of the locking cover, the external thread of the locking cover is in threaded connection with the internal thread arranged on the locking connecting hole, and the internal thread of the locking cover is in threaded connection with the bolt rod of the bolt to tightly press the locking rubber gasket.
Preferably, the height of the fixing pin is equal to the height of the through hole.
Preferably, the height of the locking connection hole is equal to the sum of the height of the locking rubber gasket and the height of the locking cover.
Preferably, the diameter of the sheathing hole of the fixing pin is greater than that of the bolt head of the bolt.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model discloses do not change the foundation structure of current drill collar, on the basis of prior art the outer circumference equipartition of drill collar female joint and drill collar male joint threaded connection department has seted up four shoulder holes, has set gradually bolt, spring, fixed pin, locking rubber pad and locking lid in the shoulder hole, is connected drill collar female joint and drill collar male joint once more, when the drill collar appears reversing, because the fixed pin has fixed the upper and lower joint of drill collar, make it can't take place the pine phenomenon of screw thread, thereby played the effect of anti-disengaging;
2. the utility model discloses the effect of well locking rubber pad and spring is inhale the effect of shake, shock attenuation and fine setting.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
fig. 3 is a cross-sectional view taken along line B-B of fig. 1 according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1-3, an anti-back-off drill collar comprises a drill collar with two joint parts in double-shoulder threaded connection, wherein the two joint parts comprise a drill collar male joint 1 with external threads and a drill collar female joint 2 with internal threads, the two drill collars are in threaded connection with the drill collar male joint 1 through the drill collar female joint 2, four stepped holes are uniformly distributed on the outer circumference of the threaded connection part of the drill collar female joint 2 and the drill collar male joint 1, each stepped hole is provided with a through hole and a locking connection hole which are communicated with each other, the locking connection hole is arranged on the drill collar female joint 2, the locking connection hole is provided with internal threads, and the through hole is communicated with the locking connection hole and penetrates through the threaded connection part of the drill collar female joint 2 and the drill collar male joint 1; a bolt 3, a spring 4, a fixed pin 5, a stop rubber pad 6 and a locking cover 7 are sequentially arranged in the stepped hole, a screwing groove is formed in the end part of a bolt rod of the bolt 3, a bolt head of the bolt 3 is in contact with the bottom of the through hole, the spring 4 is sleeved on the bolt rod of the bolt 3, a connecting stepped hole is formed in the middle of the fixed pin 5 and comprises a sleeved hole and an inner threaded hole which are communicated with one end and the other end of the fixed pin 5, the fixed pin 5 and the through hole are in clearance fit connection and are installed in the through hole, the inner threaded hole of the fixed pin 5 is in threaded connection with the bolt rod of the bolt 3, meanwhile, the sleeved hole of the fixed pin 5 is sleeved with the bolt head of the bolt 3, and the spring 4 is tightly pressed on the bolt head of the bolt 3 through a step; the locking rubber gasket 6 is arranged in the locking connecting hole, an internal thread is arranged in the middle of the locking cover 7, an external thread is arranged on the outer circumference of the locking cover 7, the external thread of the locking cover 7 is in threaded connection with the internal thread arranged on the locking connecting hole, and the internal thread of the locking cover 7 is in threaded connection with the bolt rod of the bolt 3 to tightly press the locking rubber gasket 6.
The height of the fixing pin 5 is equal to the height of the through hole.
The height of the locking connecting hole is equal to the sum of the height of the locking rubber gasket 6 and the height of the locking cover 7.
The diameter of the sheathing hole of the fixing pin 5 is larger than that of the bolt head of the bolt 3.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement, component separation or combination made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An anti-back-off drill collar comprises two joint parts, namely a drill collar with double circular shoulders in threaded connection, wherein the two joint parts comprise a drill collar male joint with external threads and a drill collar female joint with internal threads; the bolt is characterized in that a bolt, a spring, a fixed pin, a locking rubber pad and a locking cover are sequentially arranged in the stepped hole, a screwing groove is formed in the end part of a bolt rod of the bolt, a bolt head of the bolt is in contact with the bottom of the through hole, the spring is sleeved on the bolt rod of the bolt, a connecting stepped hole is formed in the middle of the fixed pin and comprises a sleeved hole and an internal threaded hole, the sleeved hole and the internal threaded hole are communicated with one end and the other end of the fixed pin, the fixed pin and the through hole are in clearance fit connection and are installed in the through hole, the internal threaded hole of the fixed pin is in threaded connection with the bolt rod of the bolt, meanwhile, the sleeved hole of the fixed pin is sleeved with the bolt head of the bolt, and the; the locking rubber gasket is arranged in the locking connecting hole, an internal thread is arranged in the middle of the locking cover, an external thread is arranged on the outer circumference of the locking cover, the external thread of the locking cover is in threaded connection with the internal thread arranged on the locking connecting hole, and the internal thread of the locking cover is in threaded connection with the bolt rod of the bolt to tightly press the locking rubber gasket.
2. An anti-backup drill collar according to claim 1, wherein the height of said fixing pin is equal to the height of said through hole.
3. The anti-backup drill collar according to claim 1, wherein the height of the locking connection hole is equal to the sum of the height of the locking rubber pad and the height of the locking cover.
4. An anti-backup drill collar according to claim 1, wherein the diameter of the sleeved hole of the fixing pin is larger than the diameter of the bolt head of the bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921576286.2U CN210829111U (en) | 2019-09-20 | 2019-09-20 | Anti-back-off drill collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921576286.2U CN210829111U (en) | 2019-09-20 | 2019-09-20 | Anti-back-off drill collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210829111U true CN210829111U (en) | 2020-06-23 |
Family
ID=71272862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921576286.2U Active CN210829111U (en) | 2019-09-20 | 2019-09-20 | Anti-back-off drill collar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210829111U (en) |
-
2019
- 2019-09-20 CN CN201921576286.2U patent/CN210829111U/en active Active
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