CN104695875A - Method for improving shock absorption effect and stability of downhole drilling tool and downhole drilling tool - Google Patents
Method for improving shock absorption effect and stability of downhole drilling tool and downhole drilling tool Download PDFInfo
- Publication number
- CN104695875A CN104695875A CN201310644776.2A CN201310644776A CN104695875A CN 104695875 A CN104695875 A CN 104695875A CN 201310644776 A CN201310644776 A CN 201310644776A CN 104695875 A CN104695875 A CN 104695875A
- Authority
- CN
- China
- Prior art keywords
- drilling tool
- cylinder body
- lower contact
- shock absorber
- hydraulic shock
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
- E21B17/076—Telescoping joints for varying drill string lengths; Shock absorbers between rod or pipe and drill bit
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a method for improving the shock absorption effect and stability of a downhole drilling tool and the downhole drilling tool. The method is characterized in that a hydraulic shock absorber is arranged between a lower connector and a spindle, to eliminate or relieve the up-and-down vibration caused by bit jumping; stabilizers are arranged on the outside of the hydraulic shock absorber and on the lower connector, to prevent borehole deflection caused by lateral displacements of the drilling tool. According to the invention, by improving the structure of the downhole drilling tool, the two-way hydraulic shock absorber, the drill string stabilizer and the near-bit stabilizer are integrated to one drilling tool ingeniously, the structure of the drilling tool is simplified, bit jumping and vibration are overcome, and a near-bit drill string can be guaranteed to be kept stably in the middle under the effects of torque and bending moment. In the drilling process, the drilling speed and the quality of a well bore can be improved, and the drilling cost can be reduced. By applying the method for improving the shock absorption effect and stability of the downhole drilling tool and the downhole drilling tool, damage to the drilling equipment caused by the vibration can be effectively avoided or reduced, instability caused by the bending moment of the drill string can be overcome, the service life of a bit is greatly prolonged, the quality of the well bore is guaranteed, the drilling speed is improved, and the drilling cost is lowered.
Description
Technical field
the present invention relates to a kind of method and the down-hole equipment that improve down-hole equipment effectiveness in vibration suppression and stability, belong to drilling tool technical field.
Background technology
in oil, natural gas and geological prospecting drilling process, cause the main cause of drill string and bit damage as follows; One is due to drill string and drill bit bouncing of drilling tool and up-down vibration frequently, makes drilling rod lose the duty of pure extension, is in draw, press alternating stresses state, causes drill rod breaking or reduces application life.Significantly bouncing of drilling tool and vibration even can destroy raised platform around a well equipment.Destroy the best effort environment of drill bit, cause drill bit teeth portion come off or fracture, reduce drilling life of bit.Two is drill string and drill bit under the acting in conjunction of top rotation torque and bottom-hole back torque, and there will be larger change in torque, show as pulse and rotate, can reduce the application life of drilling rod, serious meeting causes drilling rod to twist off generation down-hole accident; Or cause drill bit teeth portion torsional pulse to fracture, reduce drilling life of bit.Three is drill string and drill bit are subject to lateral force effects in down-hole, makes drill string produce lateral displacement or drill string under pressure bending in the wellbore, causes drill bit skew in the horizontal plane or perturbs.Drill bit teeth portion is caused to come off or fracture destruction and the inclined hole deviation of well.
at present in order to overcome drill string and drill bit bouncing of drilling tool and up-down vibration frequently, usually hydraulic shock absorber can be set in drill bit nearly bit location, eliminate or slowing down vibration and shock loading that the upper and lower play of drill string causes, prevent drill string from fractureing too early or drill bit teeth portion comes off.Lateral displacement or drill string under pressure bending is produced in the wellbore in order to overcome drill string; the bending point installing drill column type stabilizer of usual meeting under nearly bit location mounting shaft die bed stabilizer and pressure effect overcomes the skew on drill bit horizontal plane and perturbs, and prevents drill bit teeth portion from coming off or fracture destruction and the generation of the inclined hole deviation of well.
the best position playing most useful effect due to these two kinds of instruments is all nearly bit location, and prior art is two kinds of instruments, and a kind of instrument in fact can only be had to be in optimum position, so existing drilling assembly cannot play best vibration damping and stablizing effect.
Summary of the invention
the object of the invention is to, there is provided one can overcome bouncing of drilling tool and vibration, can ensure again under moment of torsion and Moment, make the drill string of nearly drill bit keep stablizing method and the down-hole equipment of raising down-hole equipment effectiveness in vibration suppression placed in the middle and stability simultaneously, to improve bit speed and wellbore quality, reduction drilling cost, thus overcome the deficiencies in the prior art.
technical scheme of the present invention:
improve a method for down-hole equipment effectiveness in vibration suppression and stability, the method arranges hydraulic shock absorber between lower contact and axle, to eliminate or to slow down the up-down vibration that bouncing of drilling tool causes; On hydraulic shock absorber outside and lower contact, arrange stabilizer causes well inclined to prevent drilling tool from producing lateral displacement simultaneously.
in preceding method, described hydraulic shock absorber is column type oil cylinder, is filled with compressible liquid in oil cylinder, is eliminated or slowed down the up-down vibration that bouncing of drilling tool causes by compressible liquid.
in preceding method, described hydraulic shock absorber comprises cylinder body, and cylinder body is tubular, is provided with the piston be connected with axle in cylinder body, is filled with compressible liquid in the cavity between piston and cylinder body; Cylinder body lower end is connected with drill bit through lower contact.
in preceding method, described cylinder body outside is provided with drill string type stabilizer.
in preceding method, described lower contact is provided with shaft bottom type stabilizer.
of the present invention a kind of down-hole equipment according to said method structure is that this down-hole equipment comprises mandrel and lower contact, and lower contact is connected with drill bit; Hydraulic shock absorber is provided with between mandrel and lower contact; Hydraulic shock absorber outside is provided with drill string type stabilizer, and lower contact is provided with shaft bottom type stabilizer.
in aforementioned down-hole equipment, described hydraulic shock absorber comprises cylinder body, and cylinder body is tubular; Cylinder body upper end is provided with spline body and righting sleeve, and cylinder body lower end and lower contact are tightly connected; Be provided with piston in spline body, piston is connected with mandrel thread; Compressible liquid is provided with in gap between cylinder body and piston.
in aforementioned down-hole equipment, described piston base is connected with washing pipe.
in aforementioned down-hole equipment, bottom described lower contact, be provided with the conical internal thread be connected with drill bit.
owing to have employed technique scheme, the present invention compared with prior art, the present invention is by the improvement to down-hole equipment structure, bidirectional hydraulic damper, drill string type stabilizer and shaft bottom type stabilizer are combined on same drilling tool cleverly, simplify drilling tool structure, bouncing of drilling tool and vibrations can be overcome, can ensure again under moment of torsion, Moment, make nearly drill bit drill string keep stable placed in the middle simultaneously.Bit speed and wellbore quality, reduction drilling cost can be improved in drilling process.The unstability that the harm effectively avoiding or reduce vibration to cause drilling equipment, the moment of flexure overcoming drill string cause, greatly improve bit life, ensure that wellbore quality, improve bit speed, reduce drilling cost.Be applicable to oil, natural gas and geological prospecting drilling well.
Accompanying drawing explanation
fig. 1 is structural representation of the present invention.
being labeled as in accompanying drawing: 1-mandrel, 2-lower contact, 3-drill string type stabilizer, 4-shaft bottom type stabilizer, 5-cylinder body, 6-spline body, 7-righting sleeve, 8-piston, 9-compressible liquid, 10-washing pipe, 11-conical internal thread.
Detailed description of the invention
below in conjunction with drawings and Examples, the present invention is described in further detail, but not as any limitation of the invention.
embodiments of the invention: a kind of method improving down-hole equipment effectiveness in vibration suppression and stability of the present invention can be implemented in existing lower contact and mandrel structure, as shown in Figure 1, the method arranges hydraulic shock absorber between lower contact and axle, to eliminate or to slow down the up-down vibration that bouncing of drilling tool causes; Arrange stabilizer causes well inclined in hydraulic shock absorber bottom and lower contact top to prevent drilling tool from producing lateral displacement simultaneously.Hydraulic shock absorber is column type oil cylinder, is filled with compressible liquid in oil cylinder, is eliminated or slowed down the up-down vibration that bouncing of drilling tool causes by compressible liquid.Hydraulic shock absorber comprises cylinder body, and cylinder body is tubular, is provided with the piston be connected with axle in cylinder body, is filled with compressible liquid in the cavity between piston and cylinder body; Cylinder body lower end is connected with drill bit through lower contact.Cylinder body outside is provided with drill string type stabilizer.Lower contact is provided with shaft bottom type stabilizer.
according to said method build of the present invention a kind of down-hole equipment structural representation as shown in Figure 1, this down-hole equipment comprises mandrel 1 and lower contact 2, and lower contact 2 is connected with drill bit; Hydraulic shock absorber is provided with between mandrel 1 and lower contact 2; Hydraulic shock absorber outside is provided with drill string type stabilizer 3, and lower contact 2 is provided with shaft bottom type stabilizer 4.Hydraulic shock absorber comprises cylinder body 5, and cylinder body 5 is tubular; Cylinder body 5 upper end is provided with spline body 6 and righting sleeve 7, and cylinder body 5 lower end and lower contact 2 are tightly connected; Be provided with piston 8 in spline body 6, piston 8 is threaded with mandrel 1; Compressible liquid 9 is provided with in gap between cylinder body 5 and piston 8.Be connected with washing pipe 10 bottom piston 8.The conical internal thread 11 be connected with drill bit is provided with bottom lower contact 2.
hydraulic shock absorber of the present invention is bidirectional hydraulic damper, the harm can effectively avoiding or slow down bouncing of drilling tool, vibration and change in torque to cause drilling equipment, greatly improves bit life, ensure that wellbore quality, improves bit speed, reduces drilling cost.
shaft bottom type stabilizer is located in lower contact, moving left and right on horizontal plane is not produced when can ensure bit operation to greatest extent, guarantee drill bit teeth portion has a stable substrate when breaking rock, prevent from the displacement due to drill bit from causing drill bit teeth portion to come off or fracture making the improper destruction of drill bit.Reduce the use amount of unnecessary make a trip number and drill bit, reduce drilling cost.The present invention effectively protects whole DRILL-STRING SYSTEM not to be damaged, to improve bit life.
Claims (9)
1. improve a method for down-hole equipment effectiveness in vibration suppression and stability, it is characterized in that: the method arranges hydraulic shock absorber between lower contact and axle, to eliminate or to slow down the up-down vibration that bouncing of drilling tool causes; Arrange stabilizer causes well inclined in hydraulic shock absorber bottom and lower contact top to prevent drilling tool from producing lateral displacement simultaneously.
2. method described in claim 1, is characterized in that: described hydraulic shock absorber is column type oil cylinder, is filled with compressible liquid in oil cylinder, is eliminated or slowed down the up-down vibration that bouncing of drilling tool causes by compressible liquid.
3. method described in claim 2, is characterized in that: described hydraulic shock absorber comprises cylinder body, and cylinder body is tubular, is provided with the piston be connected with axle in cylinder body, is filled with compressible liquid in the cavity between piston and cylinder body; Cylinder body lower end is connected with drill bit through lower contact.
4. method described in claim 3, is characterized in that: described cylinder body outside is provided with drill string type stabilizer.
5. method described in claim 4, is characterized in that: described lower contact is provided with shaft bottom type stabilizer.
6. the down-hole equipment that method is formed according to the arbitrary claim of claim 1-5, comprise mandrel (1) and lower contact (2), lower contact (2) is connected with drill bit; It is characterized in that: between mandrel (1) and lower contact (2), be provided with hydraulic shock absorber; Hydraulic shock absorber outside is provided with drill string type stabilizer (3), and lower contact (2) is provided with shaft bottom type stabilizer (4).
7. down-hole equipment described in claim 6, is characterized in that: described hydraulic shock absorber comprises cylinder body (5), and cylinder body (5) is tubular; Cylinder body (5) upper end is provided with spline body (6) and righting sleeve (7), and cylinder body (5) lower end and lower contact (2) are tightly connected; Be provided with piston (8) in spline body (6), piston (8) is threaded with mandrel (1); Compressible liquid (9) is provided with in gap between cylinder body (5) and piston (8).
8. down-hole equipment described in claim 7, is characterized in that: described piston (8) bottom is connected with washing pipe (10).
9. down-hole equipment described in claim 8, is characterized in that: described lower contact (2) bottom is provided with the conical internal thread (11) be connected with drill bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310644776.2A CN104695875A (en) | 2013-12-05 | 2013-12-05 | Method for improving shock absorption effect and stability of downhole drilling tool and downhole drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310644776.2A CN104695875A (en) | 2013-12-05 | 2013-12-05 | Method for improving shock absorption effect and stability of downhole drilling tool and downhole drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104695875A true CN104695875A (en) | 2015-06-10 |
Family
ID=53343380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310644776.2A Pending CN104695875A (en) | 2013-12-05 | 2013-12-05 | Method for improving shock absorption effect and stability of downhole drilling tool and downhole drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104695875A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545223A (en) * | 2016-01-29 | 2016-05-04 | 贵州高峰石油机械股份有限公司 | Drill bit damping method and disc spring bidirectional damper |
| CN107965278A (en) * | 2016-10-20 | 2018-04-27 | 中国石油化工股份有限公司 | A kind of drill assembly |
| CN111749619A (en) * | 2019-03-26 | 2020-10-09 | 中石化石油工程技术服务有限公司 | Inhale shake formula pulse accelerator and drilling tool system |
-
2013
- 2013-12-05 CN CN201310644776.2A patent/CN104695875A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545223A (en) * | 2016-01-29 | 2016-05-04 | 贵州高峰石油机械股份有限公司 | Drill bit damping method and disc spring bidirectional damper |
| CN107965278A (en) * | 2016-10-20 | 2018-04-27 | 中国石油化工股份有限公司 | A kind of drill assembly |
| CN107965278B (en) * | 2016-10-20 | 2020-07-03 | 中国石油化工股份有限公司 | Drilling tool combination |
| CN111749619A (en) * | 2019-03-26 | 2020-10-09 | 中石化石油工程技术服务有限公司 | Inhale shake formula pulse accelerator and drilling tool system |
| CN111749619B (en) * | 2019-03-26 | 2022-04-19 | 中石化石油工程技术服务有限公司 | Inhale shake formula pulse accelerator and drilling tool system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102587832B (en) | Pressure resistant tool for reducing frictional resistance of horizontal well section | |
| CN203296693U (en) | Drilling tool capable of generating axial impact vibration | |
| CN105064919A (en) | Ultra-short-radius radial lateral drilling method for horizontal wells | |
| CN202731750U (en) | Vibration compression drilling tool | |
| CN202990851U (en) | Screw type high-frequency percussion drilling tool | |
| CN102418488A (en) | Wire line coring drill | |
| CN203603760U (en) | Downhole drilling tool | |
| CN104695875A (en) | Method for improving shock absorption effect and stability of downhole drilling tool and downhole drilling tool | |
| CN106894770A (en) | A kind of downhole tool for reducing drill string stick slip vibration | |
| CN202900044U (en) | Double stabilizer prebuckling dynamics pendulum drilling assembly | |
| CN205225090U (en) | A buffering short circuit for reducing drilling string vibration damage | |
| CN106089118A (en) | A kind of method preventing drill string from torsional resonance occurring and flexible torque amortisseur | |
| CN106545304A (en) | A kind of anti-bit bouncing drilling rig | |
| CN110080692A (en) | A kind of novel self-interacting type PDC drill bit | |
| CN109403878B (en) | Shock absorber for protecting top drive | |
| Zhu et al. | Downhole vibration causing a drill collar failure and solutions | |
| CN103775004B (en) | Prevent bidirectional hydraulic damper from moving back method and the damper of button | |
| CN202596585U (en) | Energy-storage protection tool for mechanical drilling tool | |
| CN201661248U (en) | Drilling bit and drilling string vibration absorption tool | |
| CN201460781U (en) | Rope type coal bed coring tool | |
| CN104499959A (en) | Novel vertical drilling tension anti-deviation drill collar | |
| CN104563891B (en) | Flexible from damping drill bit | |
| CN102061908B (en) | Axial vibration damper applicable to measuring instrument while drilling | |
| CN201241633Y (en) | Rotary centralizer | |
| CN209398373U (en) | A kind of damper for protecting top to drive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150610 |