CN204703784U - A kind of down-hole string is with brill shock absorber - Google Patents
A kind of down-hole string is with brill shock absorber Download PDFInfo
- Publication number
- CN204703784U CN204703784U CN201520434222.4U CN201520434222U CN204703784U CN 204703784 U CN204703784 U CN 204703784U CN 201520434222 U CN201520434222 U CN 201520434222U CN 204703784 U CN204703784 U CN 204703784U
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- CN
- China
- Prior art keywords
- mandrel
- oil cylinder
- oil
- spline
- shock absorber
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model relates to a kind of down-hole string with brill shock absorber; Belong to the down-hole string vibration dampening tool technical field of oil drilling construction operation.This shock absorber comprises mandrel, splined shaft, oil cylinder, spline urceolus, upper mud-scraping ring and lower mud-scraping ring; The threaded one end of mandrel is provided with splined shaft; Splined shaft is set with spline urceolus, the mandrel of spline urceolus side is provided with oil cylinder and oil cylinder cover successively; Oil cylinder cover is provided with mud-scraping ring, and the inner surface of oil cylinder is provided with boss; The mandrel of boss side is provided with equalizing valve.This shock absorber by the oil filler point on mandrel respectively to injecting silicone oil in two cavitys to regulate the pressure balance in two cavitys; Reach the object of vibration damping with this, solve existing drill bit while generation rock breaking efficiency, longitudinal direction and rotational vibration can be produced; Cause the parts fatigue damage in drill string, thus reduce its application life, and easily cause the problem of security incident.This damper effectively can prevent the fatigue damage of drilling tool, improves rate of penetration.
Description
Technical field
The utility model relates to a kind of down-hole string with brill shock absorber; Belong to the down-hole string vibration dampening tool technical field of oil drilling construction operation.
Background technology
In petroleum drilling operation engineering, drill bit, while generation rock breaking efficiency, can produce longitudinal direction and rotational vibration.These vibrations can impact whole drill string, cause some parts fatigue damage in drill string, reduce its application life, cause security incident.Therefore, be necessary to research and develop a kind of shock absorber; Effectively to absorb these harmful vibrational energies, store or change into other forms of energy, reduce fatigue damage, reach protection drilling tool, improve rate of penetration, reduce the object of drilling cost.
Summary of the invention
The purpose of this utility model is: provide that a kind of reasonable in design, flexible operation are simple, operating efficiency is high, the down-hole string of good damping effect is with brill shock absorber.
The utility model realizes above-mentioned purpose by the following technical solutions:
A kind of down-hole string, with brill shock absorber, comprises mandrel, splined shaft, oil cylinder, spline urceolus, upper mud-scraping ring and lower mud-scraping ring; It is characterized in that: the threaded one end of mandrel is provided with splined shaft; Splined shaft is set with spline urceolus, the mandrel of spline urceolus side is provided with oil cylinder and oil cylinder cover successively; One end of oil cylinder is threaded with spline urceolus, and the other end of oil cylinder is threaded with oil cylinder cover, and oil cylinder cover is provided with mud-scraping ring, and on the mandrel of upper mud-scraping ring side, screw thread is provided with stop nut; The inner surface of oil cylinder is provided with boss, boss is provided with lower mud-scraping ring; The mandrel of boss side is provided with equalizing valve, equalizing valve cylindrically, the circumferentially axial of equalizing valve was evenly equipped with oil hole, the upper one end port crossing oil hole is provided with lower disc, the upper equalizing valve crossed inside oil hole was circumferentially axially evenly equipped with oil hole, the lower one end port crossing oil hole is provided with valve block, and the mandrel of equalizing valve one end is provided with lower check spring by hold-down nut and lower spring cup, and lower check spring contacts with lower disc and connects; The mandrel of the equalizing valve other end is provided with upper check spring by upper spring seat, and upper check spring contacts with upper valve block and connects; The mandrel of described equalizing valve both sides is respectively arranged with oil filler point.
Described mandrel is a stair-stepping diameter-changing body, is provided with O-ring seal between mandrel and splined shaft.
Described splined shaft appearance is circumferentially evenly equipped with spline, and the interior table of spline urceolus is circumferentially evenly equipped with spline, is slidably connected between splined shaft and spline urceolus by the cooperation of spline and spline.
The junction of described oil cylinder and spline urceolus and oil cylinder cover is respectively arranged with sealing ring.
O-ring seal is provided with between described boss and mandrel.
The utility model has the advantage of:
This down-hole string is simple, novel in design with brill damper structure; By the equalizing valve that mandrel is installed, the cavity between oil cylinder and mandrel is divided into two separate and cavitys of sealing, and by the oil filler point on the mandrel of equalizing valve both sides respectively to injecting silicone oil in two cavitys to regulate the pressure balance in two cavitys; In the course of work, absorb energy by the change of silicone oil amount in two cavitys and flow resistance and reach, reach the object of vibration damping with this, solve existing drill bit while generation rock breaking efficiency, longitudinal direction and rotational vibration can be produced; These vibrations can impact whole drill string, cause the parts fatigue damage in drill string, thus reduce its application life, and easily cause the problem of security incident.And damping rate is large, efficiency is high and easy for installation feature that this damper has, effectively can prevent the fatigue damage of drilling tool, improve rate of penetration.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structure for amplifying schematic diagram at Figure 1A place;
Fig. 3 is the structural representation of equalizing valve of the present utility model.
In figure: 1, mandrel, 2, splined shaft, 3, oil cylinder, 4, spline urceolus, 5, upper mud-scraping ring, 6, lower mud-scraping ring, 7, spline, 8, spline, 9, oil cylinder cover, 10, stop nut, 11, boss, 12, equalizing valve, 13, upper plenum, 14, lower cavity, 15, above cross oil hole, 16, descended oil hole, 17, lower disc, 18, upper valve block, 19, hold-down nut, 20, lower spring cup, 21, lower check spring, 22, upper spring seat, 23, upper check spring, 24, oil filler point.
Detailed description of the invention:
This down-hole string comprises mandrel 1, splined shaft 2, oil cylinder 3, spline urceolus 4, upper mud-scraping ring 5 and lower mud-scraping ring 6 with brill shock absorber.The threaded one end of mandrel 1 is provided with splined shaft 2; Splined shaft 2 is set with spline urceolus 4.Splined shaft 2 appearance is circumferentially evenly equipped with spline 7, and the interior table of spline urceolus 4 is circumferentially evenly equipped with spline 8, is slidably connected between splined shaft 2 and spline urceolus 4 by the cooperation of spline 7 and spline 8.
The mandrel 1 of spline urceolus 4 side is provided with successively oil cylinder 3 and oil cylinder cover 9; One end of oil cylinder 3 is threaded with spline urceolus 4, and the other end of oil cylinder 3 is threaded with oil cylinder cover 9, oil cylinder cover 9 is provided with mud-scraping ring 5.Oil cylinder 3 is respectively arranged with sealing ring with the junction of spline urceolus 4 and oil cylinder cover 9.
On the mandrel 1 of upper mud-scraping ring 5 side, screw thread is provided with stop nut 10; The inner surface of oil cylinder 3 is provided with boss 11, and boss 11 and mandrel 1 are slidably connected; Boss 11 is provided with lower mud-scraping ring 6; O-ring seal is provided with between boss 11 and mandrel 1.The mandrel 1 of boss 11 side is provided with equalizing valve 12, thus the compartition between oil cylinder 3 with mandrel 1 is become two separate and the upper plenum 13 sealed and lower cavitys 14.
Equalizing valve 12 cylindrically, equalizing valve 12 be circumferentially axially evenly equipped with oil hole 15, one end port that upper mistake oil hole 15 is positioned at lower cavity 14 is provided with lower disc 17.
The upper equalizing valve 12 crossed inside oil hole 15 was circumferentially axially evenly equipped with oil hole 16, and one end port that lower mistake oil hole 16 is positioned at upper plenum 13 is provided with valve block 18.
The mandrel 1 of equalizing valve 12 one end is provided with lower check spring 21 by hold-down nut 19 and lower spring cup 20, and lower check spring 21 contacts with lower disc 17 and connects; The mandrel 1 of equalizing valve 12 other end is provided with upper check spring 23 by upper spring seat 22, and upper check spring 23 contacts with upper valve block 18 and connects.
The mandrel 1 of equalizing valve 12 both sides is respectively arranged with oil filler point 24; Oil filler point 24 is communicated with lower cavity 14 with upper plenum 13 respectively, for the injection of silicone oil.
This down-hole string is a stair-stepping diameter-changing body with the mandrel 1 of brill shock absorber, is provided with O-ring seal between mandrel 1 and splined shaft 2.This down-hole string is threaded with tubing string by mandrel 1 with during the work of brill shock absorber, is connected with drill bit thread by spline urceolus 4.In drilling process, drill bit vibrates, and when drill bit in vibration processes to top offset time, the shock absorber shell that oil cylinder 3 and spline urceolus 4 are formed moves up, now, in oil cylinder 3, the cavity volume of lower cavity 14 progressively reduces, and the cavity volume of upper plenum 13 progressively increases; Cavity pressure changes, the silicone oil generation elastic deformation in upper and lower cavity.
When pressure acquires a certain degree, when namely descending the silicone oil pressure in cavity 14 to be greater than the elastic force of check spring 23, the upper valve block 18 of equalizing valve 12 is flicked, and silicone oil is flowed in upper plenum 13 by the oil hole 16 that descended of equalizing valve 12.Because silicon oil viscosity is large, during by descending oil hole 16, resistance greatly, adds that the inhibition of valve block 18 makes silicone oil flow resistance strengthen outward; Thus by the elastic deformation of silicone oil and resistance when flowing through oil hole 16, thus absorb the vibrational energy of drill bit and stop drill bit to move up.
When drill bit is to bottom offset, the shock absorber shell be made up of oil cylinder 3 and spline urceolus 4 moves down thereupon, and now, the cavity volume of upper plenum 13 progressively reduces, and the cavity volume of lower cavity 14 progressively increases, and the silicone oil in upper plenum 13 chamber also elastic deformation occurs.When pressure acquires a certain degree, namely when the silicone oil pressure in upper plenum 13 is greater than the elastic force of lower check spring 21, the lower disc 17 of equalizing valve 12 is flicked, silicone oil is by the upper oil hole 15 of crossing on equalizing valve 12 from cavity 14 inflow in upper plenum 13, and this process can absorb energy equally and stop drill bit to move down.So repeatedly, make this damper utilize the elastic deformation of silicone oil and flow resistance to carry out absorbing vibrational energy, thus realize the object of vibration damping; And then solve existing drill bit while generation rock breaking efficiency, longitudinal direction and rotational vibration can be produced; These vibrations can impact whole drill string, cause the parts fatigue damage in drill string, thus reduce its application life, and easily cause the problem of security incident.This damper has the advantages that damping rate is large, efficiency is high and easy for installation, effectively can prevent the fatigue damage of drilling tool, improves the drilling speed of machinery.
Embodiment described in the utility model is only the description carried out preferred embodiment of the present utility model; not the utility model design and scope are limited; under the prerequisite not departing from the utility model design philosophy; the various distortion that in this area, engineers and technicians make the technical solution of the utility model and improvement; protection domain of the present utility model all should be fallen into; the technology contents of the utility model request protection, all records in detail in the claims.
Claims (5)
1. down-hole string is with a brill shock absorber, comprises mandrel (1), splined shaft (2), oil cylinder (3), spline urceolus (4), upper mud-scraping ring (5) and lower mud-scraping ring (6), it is characterized in that: the threaded one end of mandrel (1) is provided with splined shaft (2), splined shaft (2) is set with spline urceolus (4), the mandrel (1) of spline urceolus (4) side is provided with successively oil cylinder (3) and oil cylinder cover (9), one end of oil cylinder (3) is threaded with spline urceolus (4), the other end of oil cylinder (3) is threaded with oil cylinder cover (9), oil cylinder cover (9) is provided with mud-scraping ring (5), the upper screw thread of mandrel (1) of upper mud-scraping ring (5) side is provided with stop nut (10), the inner surface of oil cylinder (3) is provided with boss (11), boss (11) is provided with lower mud-scraping ring (6), the mandrel (1) of boss (11) side is provided with equalizing valve (12), equalizing valve (12) cylindrically, the circumferentially axial of equalizing valve (12) was evenly equipped with oil hole (15), upper oil hole (15) excessively, one end port be provided with lower disc (17), the upper equalizing valve (12) crossing oil hole (15) inner side was circumferentially axially evenly equipped with oil hole (16), the lower one end port crossing oil hole (16) is provided with valve block (18), the mandrel (1) of equalizing valve (12) one end is provided with lower check spring (21) by hold-down nut (19) and lower spring cup (20), lower check spring (21) contacts with lower disc (17) and connects, the mandrel (1) of equalizing valve (12) other end is provided with upper check spring (23) by upper spring seat (22), and upper check spring (23) contacts with upper valve block (18) and connects, the mandrel (1) of described equalizing valve (12) both sides is respectively arranged with oil filler point (24).
2. a kind of down-hole string according to claim 1 is with brill shock absorber, it is characterized in that: described mandrel (1) is a stair-stepping diameter-changing body, is provided with O-ring seal between mandrel (1) and splined shaft (2).
3. a kind of down-hole string according to claim 1 is with brill shock absorber, it is characterized in that: described splined shaft (2) appearance is circumferentially evenly equipped with spline (7), the interior table of spline urceolus (4) is circumferentially evenly equipped with spline (8), is slidably connected between splined shaft (2) and spline urceolus (4) by the cooperation of spline (7) and spline (8).
4. a kind of down-hole string according to claim 1 is with brill shock absorber, it is characterized in that: described oil cylinder (3) is respectively arranged with sealing ring with the junction of spline urceolus (4) and oil cylinder cover (9).
5. a kind of down-hole string according to claim 1 is with brill shock absorber, it is characterized in that: be provided with O-ring seal between described boss (11) and mandrel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520434222.4U CN204703784U (en) | 2015-06-24 | 2015-06-24 | A kind of down-hole string is with brill shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520434222.4U CN204703784U (en) | 2015-06-24 | 2015-06-24 | A kind of down-hole string is with brill shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204703784U true CN204703784U (en) | 2015-10-14 |
Family
ID=54283409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520434222.4U Withdrawn - After Issue CN204703784U (en) | 2015-06-24 | 2015-06-24 | A kind of down-hole string is with brill shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204703784U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975815A (en) * | 2015-06-24 | 2015-10-14 | 长江大学 | While drilling vibration reducer |
| CN107366513A (en) * | 2016-05-13 | 2017-11-21 | 中国石油化工股份有限公司 | A kind of pipe string of oil-water well axial vibration absorber |
| CN110273959A (en) * | 2019-07-04 | 2019-09-24 | 西安石油大学 | A kind of controllable magnetic rheology down-hole string vibration suppression device |
-
2015
- 2015-06-24 CN CN201520434222.4U patent/CN204703784U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975815A (en) * | 2015-06-24 | 2015-10-14 | 长江大学 | While drilling vibration reducer |
| CN104975815B (en) * | 2015-06-24 | 2017-03-08 | 长江大学 | One kind is with brill shock absorber |
| CN107366513A (en) * | 2016-05-13 | 2017-11-21 | 中国石油化工股份有限公司 | A kind of pipe string of oil-water well axial vibration absorber |
| CN110273959A (en) * | 2019-07-04 | 2019-09-24 | 西安石油大学 | A kind of controllable magnetic rheology down-hole string vibration suppression device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151014 Effective date of abandoning: 20171114 |