CN2716483Y - Downhole vibrodrilling tool induced by hydraulic pulse - Google Patents

Abstract

The utility model discloses a down-hole vibrating drilling tool induced by hydraulic pulse, comprising a drill-post converting connector, an upper spraying nozzle, a middle spraying nozzle, a lower spraying nozzle, a lower spraying nozzle sleeve, a shell, a drill-driving bit short joint, etc. The utility model is characterized in that the drill-driving bit short joint is matched with the shell at the lower end of the shell, the upper end of the drill-driving bit short joint is threaded with the lower spraying nozzle, and the lower end of the drill-driving bit short joint is connected with a drill head. The lower spraying nozzle, the middle spraying nozzle and the upper spraying nozzle are orderly arranged in the inner part of the shell through the upper end of the shell to form a two-stage hydroscillator structure assembling with the lower spraying nozzle. The drilling fluid is modulated to a pulse fluid jet acting on the upper end of the drill-driving bit short joint. A periodic attacking force to the drill head is formed, and a longitudinal mechanical oscillation is generated by the drill head. Through the improvement of the stress condition of the drill head and the rock near to the down-hole, the rock-breaking drilling efficiency of the drill head is effectively improved. The utility model has the advantages of simple structure, convenient use and operation, safety, reliability, low pressure consumption, etc. The adaptability to the drill head and the ground is strong, and the structures of drilling tools are not influenced. The utility model has important actual meaning for improving the drilling speed and reducing the production cost.

Description

A kind of waterpower pulse brings out the underground vibrating drilling tool

Technical field

The utility model belongs to the corollary apparatus of oil, gas drilling.

Technical background

Present domestic oil-gas exploration, the development of exploitation forward deep formation, it is more and more hard not breakable stratum to occur, and the bit diameter that the increase of well depth causes is big, the well segment length, and rate of penetration waits problem to affect the construction progress and the drilling cost of whole well slowly always.For example: often run into that the pressure of the drill is little, drilling speed is slow, easily hole deviation, a series of problems such as the bit type selection scope is little and the life-span is short, makes exploration expenditure well beyond planned investment, prolongs greatly exploration cycle, has restricted the progress of exploration and development greatly.Therefore, seek new, breaking technique for rock efficiently, to these regional bit speed of further raising, reduce drilling cost, to shorten the exploration and development cycle significant.Field practice and laboratory test research all show, if drill bit is applied suitable periodic shock active force, to help to improve the broken rock drilling efficiency of drill bit, therefore the impact shock drilling technology is a focus of current domestic and international drilling engineering circle research, also be expected to become an important means that improves the deep-well rate of penetration from now on, but there is the problem of the following aspects in current techniques, and (1), life-span are short.Because the restriction of material property causes some instrument to be difficult to adapt to complicated physicochemical environments such as shaft bottom HTHP, strong acid and strong base, the life-span is shorter, as with spring as the energy-accumulating element percussion drilling tool.(2), influenced by property of drilling fluid bigger, as with the percussion drilling tool of bistable jet as commutation element, when property of drilling fluid changes, then may cause the tool work instability.(3), be subjected to the influence of well depth bigger, as needs the annular space spiracle is set, realize that by displacement the percussion drilling tool of pressure reduction feedback only could operate as normal in certain well depth scope.(4) the impact shock parameter is unreasonable, unilateral demanding ballistic work.The performance of kits such as this impact drilling tool and drill bit has proposed very high requirement; make tool construction be tending towards complicated; manufacturing cost rises, and the stability of a system descends, and the development that above-mentioned these factors have restricted the impact shock drilling technology forms commercial Application stable, scale.

Summary of the invention

The influence short, that be subjected to property of drilling fluid and well depth of prior art means life-span is big, the impact shock parameter is unreasonable in order to solve just for the utility model, be difficult to effectively to improve that problem such as deep drilling speed designs, its principle is to form hydraulic pulse by the modulation of hydraulic oscillation structure, and hydraulic pulse is converted to the mechanical oscillation of drill bit, improve near the force-bearing situation of the rock in drill bit and shaft bottom, effectively improve efficiency of breaking rock, the purpose of this utility model is brought out the underground vibrating drilling tool for the scene provides a kind of waterpower pulse exactly.

The utility model is achieved like this, it is by the drill string crossover sub, top nozzle, middle nozzle, following nozzle, following nozzle cage, housing and drill bit drive compositions such as pipe nipple, drill bit drives the pipe nipple two ends and is processed with screw thread, lower end and drill bit link, the cooperation section that the cooperation through hole of housing lower end and drill bit drive the pipe nipple middle part is processed into polygon, drill bit drives pipe nipple is fitted into the housing lower end by the housing lower end cooperation through hole, drill bit drives pipe nipple upper end and following nozzle spiral marking connection, to descend pack into enclosure interior lower end and following nozzle of nozzle to be equipped with then, upper end at following nozzle cage is connected to middle nozzle, the upper end of middle nozzle is connected to top nozzle, the upper end of housing links by drill string conversion pipe nipple and drill string, the lower surface of drill string conversion pipe nipple and the upper surface of top nozzle join, constitute one-level vibration chamber between the lower surface of top nozzle and the entrance face of middle nozzle, constitute secondary vibration chamber between the lower surface of middle nozzle and the upper surface of following nozzle, drilling fluid is through entering top nozzle and one-level vibration chamber, through resonance, feedback, self-oscillation process such as frequency-selecting and amplification, outlet ejection by middle nozzle forms pulsing jet, this pulsing jet acts on down the upper surface of nozzle, drive pipe nipple by drill bit drill bit is formed periodic impact forces, simultaneously by the pulsing jet of middle jet expansion ejection in secondary vibration chamber, through resonance, feedback, self-oscillation process such as frequency-selecting and amplification, outlet ejection at following nozzle forms amplitude and the bigger pulsing jet of peak value, this pulsing jet acts on drill bit and drives on the interior step surface of pipe nipple upper end runner, drive pipe nipple by drill bit drill bit is formed periodic impact forces, under the periodic impact forces comprehensive function on the step surface under acting in the runner of nozzle entrance end face and drill bit driving pipe nipple upper end, make drill bit produce mechanical oscillation longitudinally, by improving near the force-bearing situation of rock drill bit and the shaft bottom, effectively improve the broken rock drilling efficiency of drill bit, the frequency of drill bit mechanical oscillation, peak value and amplitude are by adjusting top nozzle, middle nozzle, following nozzle, the size of one-level oscillation chamber and secondary oscillation chamber waits and obtains.

The hydraulic pulse that the utility model creatively generates the hydroscillator modulation, be converted to vertical mechanical oscillation of drill bit, by improving near the force-bearing situation of rock drill bit and the shaft bottom, effectively improve the broken rock drilling efficiency of drill bit, the utlity model has simple in structure, use easy to operate, safe and reliable, press consumption low, the compliance on drill bit and stratum is influenced characteristics such as drilling tool structure by force and not, for improve bit speed, reducing production costs has important and practical meanings.

Description of drawings

A kind of waterpower pulse of Fig. 1 brings out the underground vibrating drilling tool

1. drill string is changed pipe nipple; 2. top nozzle; 3. middle nozzle; 4. descend nozzle; 5. play nozzle cage; 6. housing; 7. drill bit drives pipe nipple; 8. top nozzle enters the mouth; 9. top nozzle outlet; 10. one-level vibration chamber; 11. middle jet expansion; 12. secondary vibration chamber; 13. following jet expansion; 14. step surface

The specific embodiment

Now the utility model will be further described in conjunction with Figure of description.

When adopting the utility model to make drill bit produce mechanical oscillation, drill bit drives pipe nipple [7] two ends and is processed with screw thread, lower end and drill bit link, the cooperation section that the cooperation through hole of housing [6] lower end and drill bit drive pipe nipple [7] middle part is processed into polygon, drill bit drives pipe nipple [7] is fitted into housing [6] lower end by housing [6] lower end cooperation through hole, drill bit drives pipe nipple [7] upper end and uses spiral marking connection with following nozzle [4], to descend pack into housing [6] interior lower end and following nozzle [4] of nozzle [4] to be equipped with then, upper end at following nozzle cage [5] is connected to middle nozzle [3], the upper end of middle nozzle [3] is connected to top nozzle [2], the upper end of housing [6] is changed pipe nipple [1] by drill string and is linked with drill string, the lower surface of drill string conversion pipe nipple [1] and the upper surface of top nozzle [2] join, drill string conversion pipe nipple [1] axle center is processed with runner, constitute one-level vibration chamber [10] between the entrance face of the lower surface of top nozzle [2] and middle nozzle [3], constitute secondary vibration chamber [12] between the upper surface of the lower surface of middle nozzle [3] and following nozzle [4].

When adopting the utility model to make drill bit produce mechanical oscillation, drilling fluid is through entering top nozzle [2] and one-level vibration chamber [10], through resonance, feedback, self-oscillation process such as frequency-selecting and amplification, by middle jet expansion [11] ejection formation pulsing jet, this pulsing jet acts on down the upper surface of nozzle [4], drive pipe nipple [7] by drill bit drill bit is formed periodic impact forces, simultaneously by the pulsing jet of middle jet expansion [11] ejection in secondary vibrates chamber [12], through resonance, feedback, self-oscillation process such as frequency-selecting and amplification, form amplitude and the bigger pulsing jet of peak value in following jet expansion [13] ejection, this pulsing jet acts on drill bit and drives on the interior step surface [14] of pipe nipple [7] upper end runner, drive pipe nipple [7] by drill bit drill bit is formed periodic impact forces, under the periodic impact forces comprehensive function on the step surface [14] under acting in the runner of nozzle entrance end face and drill bit driving pipe nipple [7] upper end, make drill bit produce mechanical oscillation longitudinally, by improving near the force-bearing situation of rock drill bit and the shaft bottom, effectively improve the broken rock drilling efficiency of drill bit, the frequency of drill bit mechanical oscillation, peak value and amplitude are by adjusting top nozzle [2], middle nozzle [3], following nozzle [4], the size in one-level vibration chamber [10] and secondary vibration chamber [12] waits and obtains.

Claims (5)

1. a waterpower pulse brings out the underground vibrating drilling tool, it comprises drill string conversion pipe nipple, top nozzle, middle nozzle, following nozzle, following nozzle cage, housing and drill bit drive pipe nipple, it is characterized in that drill bit drives pipe nipple [7] two ends and is processed with screw thread, lower end and drill bit link, the cooperation section that the cooperation through hole of housing [6] lower end and drill bit drive pipe nipple [7] middle part is processed into polygon, drill bit drives pipe nipple [7] is fitted into housing [6] lower end by housing [6] lower end cooperation through hole, drill bit drives pipe nipple [7] upper end and uses spiral marking connection with following nozzle [4], to play pack into housing [6] interior lower end and following nozzle [4] of nozzle cage [5] to be equipped with then, upper end at following nozzle cage [5] is connected to middle nozzle [3], the upper end of middle nozzle [3] is connected to top nozzle [2], the upper end of housing [6] is changed pipe nipple [1] by drill string and is linked with drill string, the lower surface of drill string conversion pipe nipple [1] and the upper surface of top nozzle [2] join, constitute one-level vibration chamber [10] between the entrance face of the lower surface of top nozzle [2] and middle nozzle [3], constitute secondary vibration chamber [12] between the upper surface of the lower surface of middle nozzle [3] and following nozzle [4].

2. a kind of waterpower pulse according to claim 1 brings out the underground vibrating drilling tool, it is characterized in that the length in one-level vibration chamber [10] and the ratio of diameter and top nozzle outlet [9] diameter are respectively 3.6 and 3.2, the ratio of the length in secondary vibration chamber [12] and diameter and top nozzle outlet [9] diameter is respectively 4.2 and 4.0, and the ratio of the diameter of following jet expansion [13] and middle jet expansion [11] and top nozzle outlet [9] diameter is respectively 1.1 and 1.2.

3. a kind of waterpower pulse according to claim 1 brings out the underground vibrating drilling tool, it is characterized in that top nozzle inlet [8] water passage surface is processed into streamlined.

4. a kind of waterpower pulse according to claim 1 brings out the underground vibrating drilling tool, it is characterized in that top nozzle [2] and housing [6], nozzle [4] is with play nozzle cage [5], nozzle [4] is sealed and matched with drill bit driving pipe nipple [7] employing employing and is connected down down.

5. a kind of waterpower pulse according to claim 1 brings out the underground vibrating drilling tool, it is characterized in that drill bit drives pipe nipple [7] axle center and is processed with the runner that epimere is big, hypomere is little.