CN214616342U

CN214616342U - Turbine high-frequency percussion drilling tool for petroleum drilling

Info

Publication number: CN214616342U
Application number: CN202120724798.XU
Authority: CN
Inventors: 辛小军; 邹权
Original assignee: Aoyier Tianjin Technology Development Co ltd
Current assignee: Aoyier Tianjin Technology Development Co ltd
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2021-11-05
Anticipated expiration: 2031-04-09

Abstract

The utility model relates to an oil drilling technical field specifically is a turbine high frequency impact drilling tool for oil drilling, including last drill collar, the inside of going up the drill collar is equipped with the eccentric main shaft that distributes along last drill collar length direction, and the top of eccentric main shaft is rotated and is connected with the water conservancy diversion and rights the cap, and the outside fixed cover in middle section of eccentric main shaft is equipped with multistage turbine, and polylith counter weight chamber has evenly been seted up to the periphery wall of eccentric main shaft. The utility model discloses make multistage turbine produce rotatoryly under mud strikes, and then make eccentric main shaft produce the eccentric impact force of circumference, this impact force transmits for last drill collar and lower drill collar through first bearing and second bearing are indirect, and lower drill collar transmits the impact force for the drill bit again, makes it produce the radial impact force of high frequency, helps promoting the broken rock efficiency of well drilling.

Description

Turbine high-frequency percussion drilling tool for petroleum drilling

Technical Field

The utility model relates to an oil drilling technical field specifically is a turbine high frequency percussion drilling tool for oil drilling.

Background

At present, along with continuous development of oil fields, the drilling difficulty and the drilling depth are also continuously increased, and particularly, when some hard formations are met, the drill bit is easy to generate stick-slip vibration, so that the cutting teeth of the drill bit are easy to damage and lose efficacy, and the drilling speed is directly influenced. Through continuous experimental research, the torque of the drill bit cannot be stably output due to stratum reasons in the drilling process, so that the stick-slip problem is caused. Therefore, solving the problem of torque transmission during drilling becomes the key to speed increase. Years of research and application prove that the most effective method for improving the rock breaking efficiency of the drill bit and improving the drilling speed is to add various impactors to the drill bit, and the higher the impact frequency is, the greater the impact force is, the better the rock breaking effect is.

At present, according to the published data at home and abroad, a valve type torque impactor is a high-frequency vibration impact tool, is positioned at the upper part of a drill bit, and enters a well along with a drilling tool. During drilling, when high-energy drilling fluid flows through the tool, the unique flow channel structure inside the tool converts the fluid energy of the drilling fluid into high-frequency (750-1500 times/min) and periodic mechanical impact force (about 2kN) and directly transmits the high-frequency mechanical impact force to a drill bit. This allows the drill bit to cut the formation directly without waiting for sufficient energy to be accumulated to break the rock. The tool can solve the problems of complex drilling geological conditions, stratum hardness and softness staggering, quick failure of the PDC drill bit, short service life, low mechanical drilling speed and the like, can solve the problem of stick-slip of the hard-to-drill stratum of the drill bit, stabilize the drilling process, improve the rock breaking energy transfer efficiency and the mechanical drilling speed of the drill bit for breaking rock, prolong the service life of the drill bit, reduce the drilling cost and shorten the drilling period. However, the existing torsion impacter generally adopts a reversing valve type structure to guide the high-low pressure conversion of drilling fluid at two sides of the impact hammer so as to realize the repeated impact of the impact hammer on a drilling tool, and then the drilling tool is transmitted to a drill bit to form the impact on a stratum. The current reversing valve type torsion impactor causes severe erosion and abrasion of the reversing valve, the impact hammer and a matched reversing mechanism thereof due to high-frequency repeated high-low pressure conversion between the reversing valve and the impact hammer and the limitation of the structure, greatly restricts the service life of the torsion impactor, is usually far shorter than that of a matched drill bit, causes the advance drilling of tools and influences the speed-up and efficiency-improvement effect from the use. The impeller type torque impactor is an impeller-driven torque impactor for drilling, which can reduce the erosion of high-low pressure frequent switching on the internal structure of the torque impactor by utilizing a flow channel design and can prolong the service life of the torque impactor. However, the two torque impactors are tools which utilize the slurry high-low pressure difference to promote the action of the impact hammer, so the impact hammer has liquid resistance in liquid, and has energy loss in the impact and starting processes, the actually generated impact frequency is at most 1500-. Therefore, if the turbine high-frequency impactor for the oil drilling, which is ultrahigh in frequency (more than 3000 times/min), ultrahigh in impact force (more than 4000N), free of high-pressure and low-pressure cavities and extremely small in moving hydraulic resistance of the impact hammer, can be designed, the turbine high-frequency impactor has important practical significance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a turbine high frequency percussion drilling tool for oil drilling for drive drill bit high frequency vibration avoids pressure differential sticking phenomenon, improves the broken rock efficiency of well drilling.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a turbine high frequency percussion drilling tool for oil drilling, includes the drill collar, the inside of going up the drill collar is equipped with the eccentric main shaft that distributes along upper drill collar length direction, the top of eccentric main shaft is rotated and is connected with water conservancy diversion and right the cap, and the outside fixed cover in middle section of eccentric main shaft is equipped with multistage turbine, and polylith counter weight chamber has evenly been seted up to the periphery wall of eccentric main shaft, the bottom mounting of going up the drill collar has inserted down the drill collar, the drill collar is syllogic structure down, and two sections all are cylindricly about it, and its section is round platform form, and the bottom normal running fit of drill collar top and eccentric main shaft down, and the upper segment diameter of lower drill collar is less than the internal diameter of upper drill collar, and the relief hole that is used for discharging mud is evenly seted up to the upper segment bottom of lower drill collar.

Preferably, the fixed cover in the top outside of eccentric main shaft is equipped with first bearing, the outer lane of first bearing and the interior perisporium fixed connection of water conservancy diversion righting cap.

Preferably, the fixed cover in top outside of eccentric main shaft is equipped with first sealing, the outer lane of first sealing closely laminates with the internal perisporium wall of water conservancy diversion righting cap.

Preferably, a second bearing is fixedly sleeved on the outer side of the bottom of the eccentric main shaft, and an outer ring of the second bearing is fixedly connected with the inner peripheral wall of the upper section of the lower drill collar.

Preferably, a second sealing part is fixedly sleeved on the outer side of the bottom of the eccentric main shaft, and an outer ring of the second sealing part is tightly attached to the inner peripheral wall of the upper section of the lower drill collar.

Compared with the prior art, the utility model provides a turbine high frequency percussion drill for oil drilling possesses following beneficial effect:

1. the utility model makes the multistage turbine rotate under the impact of mud, so that the eccentric main shaft generates a circumferential eccentric impact force, the impact force is indirectly transmitted to the upper drill collar and the lower drill collar through the first bearing and the second bearing, and the lower drill collar transmits the impact force to the drill bit, so that the drill bit generates a high-frequency radial impact force, which is beneficial to improving the rock breaking efficiency of drilling;

2. the utility model discloses evenly seted up polylith counter weight chamber in one side of eccentric main shaft, can adjust the focus of eccentric main shaft through the filler that changes the counter weight intracavity, and then the impact force of adjustment eccentric main shaft makes this article be applicable to the geological stratification of different grade type.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the eccentric spindle structure of the present invention;

FIG. 3 is a schematic view of the lower drill collar of the present invention.

In the figure: 1. putting a drill collar; 2. an eccentric main shaft; 3. a flow guiding centralizing cap; 4. a first bearing; 5. a first seal portion; 6. a multi-stage turbine; 7. a counterweight chamber; 8. a drill collar is lowered; 9. a second bearing; 10. a second seal portion; 11. a discharge hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): referring to fig. 1, a turbine high-frequency percussion drill for petroleum drilling comprises an upper drill collar 1, an eccentric main shaft 2 distributed along the length direction of the upper drill collar 1 is arranged inside the upper drill collar 1, a flow guide centralizing cap 3 is rotatably connected to the top of the eccentric main shaft 2, the flow guide centralizing cap 3 is of a two-section structure, the upper section of the eccentric main shaft 2 is conical, the lower section of the eccentric main shaft is cylindrical, the diameter of the flow guide centralizing cap 3 is smaller than the inner diameter of the upper drill collar 1, a multi-stage turbine 6 is fixedly sleeved outside the middle section of the eccentric main shaft 2, the multi-stage turbine 6 is composed of a plurality of turbines, in the embodiment, the multi-stage turbine 6 is four stages, when the slurry moves from top to bottom, the slurry drives the eccentric main shaft 2 to rotate due to the action of the multi-stage turbine 6, and the test proves that the first-stage turbine 6 can drive the eccentric main shaft 2 to generate the vibration frequency of 50HZ/S, the four-stage turbine 6 can bring the eccentric main shaft 2 to generate an impact frequency of 200 HZ/S. A first bearing 4 is fixedly sleeved on the outer side of the top of the eccentric main shaft 2, the outer ring of the first bearing 4 is fixedly connected with the inner peripheral wall of the flow guide righting cap 3, namely, the flow guide righting cap 3 is in rotating fit with the eccentric main shaft 2 through the first bearing 4; the fixed cover in the top outside of eccentric main shaft 2 is equipped with first sealing 5, and the interior perisporium of cap 3 is right with the water conservancy diversion in the outer lane of first sealing 5 closely laminates, and the effect of first sealing 5 is avoided mud to enter into inside the cap 3 is right to the water conservancy diversion.

Referring to fig. 1 and 2, a plurality of counterweight cavities 7 are uniformly formed in the outer peripheral wall of the eccentric spindle 2, the counterweight cavities 7 are formed along one side of the eccentric spindle 2, when no substance or a light substance is filled in the counterweight cavities, the larger the deviation degree of the center of gravity of the eccentric spindle 2 is, the larger the generated impact force is, and at this time, the impact state is realized, so that the eccentric spindle is suitable for medium-soft ground layers and accelerating the cutting of a drill bit; when the balance weight cavity is completely balanced, the gravity center of the eccentric main shaft 2 is centered, and according to the gyro stabilization principle, the tool becomes a self-stabilization state, so that the tool is suitable for a hard stratum, the cutting condition of a drill bit is improved, the drill bit can stably and effectively cut, and the drilling speed is increased.

Referring to fig. 1 and 3, a lower drill collar 8 is fixedly inserted into the bottom end of an upper drill collar 1, the lower drill collar 8 is of a three-section structure, the upper and lower sections of the lower drill collar 8 are cylindrical, the middle section of the lower drill collar 8 is in a circular truncated cone shape, the lower section of the lower drill collar 8 is located outside the upper drill collar 1, the middle section of the lower drill collar 8 is attached to the inner wall of the upper drill collar 1, the top of the lower drill collar 8 is rotatably matched with the bottom of an eccentric spindle 2, the diameter of the upper section of the lower drill collar 8 is smaller than the inner diameter of the upper drill collar 1, discharge holes 11 for discharging slurry are uniformly formed in the bottom of the upper drill collar 8, and when the slurry moves to the bottom of the upper drill collar 1 from top to bottom, the slurry passes through the discharge holes 11 and enters the inside of the lower drill collar 8, and is finally discharged to the outside of the upper drill collar 1. A second bearing 9 is fixedly sleeved on the outer side of the bottom of the eccentric main shaft 2, the outer ring of the second bearing 9 is fixedly connected with the inner peripheral wall of the upper section of the lower drill collar 8, namely, the eccentric main shaft 2 is in rotating fit with the lower drill collar 8 through the second bearing 9; the second sealing part 10 is fixedly sleeved on the outer side of the bottom of the eccentric main shaft 2, the outer ring of the second sealing part 10 is tightly attached to the inner peripheral wall of the upper section of the lower drill collar 8, and slurry is prevented from entering the inner side of the upper section of the lower drill collar 8 by the second sealing part 10.

The working principle is as follows: the utility model discloses in the use, mud enters into drill collar 1 from the upper end of last drill collar 1 inside in succession, and the cap is right to the backward flow after the water conservancy diversion, and mud strikes multistage turbine 6 and drives multistage turbine 6 and produce rotatoryly, and multistage turbine 6 and then drive eccentric main shaft 2 and produce rotatoryly, because eccentric main shaft 2's focus is not placed in the middle, consequently, eccentric main shaft 2's rotation can produce the eccentric impact force of circumference. The impact force is transmitted to the diversion centralizing cap 3, the upper drill collar 1 and the lower drill collar 8 through the structures such as the first bearing 4 and the second bearing 9, and the lower drill collar 8 transmits the impact force to the drill bit, so that radial impact force is formed on the drill bit, and the drill bit is assisted in rock breaking. In addition, in the utility model, one side of the eccentric main shaft 2 is provided with a plurality of counterweight cavities 7, when in use, the impact force of the eccentric main shaft 2 can be adjusted according to the different mass of the materials filled in the counterweight cavities 7; meanwhile, the impact frequency of the eccentric main shaft 2 can be adjusted according to the number of the multistage turbines 6, and therefore the product is suitable for geological layers of different types.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a turbine high frequency percussion drill for oil drilling, includes drill collar (1), its characterized in that: the inner part of the upper drill collar (1) is provided with an eccentric main shaft (2) distributed along the length direction of the upper drill collar (1), the top of the eccentric main shaft (2) is rotatably connected with a diversion centralizing cap (3), a multistage turbine (6) is fixedly sleeved outside the middle section of the eccentric main shaft (2), a plurality of counterweight cavities (7) are uniformly formed in the peripheral wall of the eccentric main shaft (2), a lower drill collar (8) is fixedly inserted into the bottom end of the upper drill collar (1), the lower drill collar (8) is of a three-section structure, the upper section and the lower section of the lower drill collar are cylindrical, the middle section of the lower drill collar is in a round table shape, the top of the lower drill collar (8) is rotatably matched with the bottom of the eccentric main shaft (2), the upper section of the lower drill collar (8) is smaller than the inner diameter of the upper drill collar (1), and a discharge hole (11) for discharging slurry is uniformly formed in the bottom of the upper section of the lower drill collar (8).

2. The turbine high-frequency percussion drill for oil drilling according to claim 1, wherein: the fixed cover in top outside of eccentric main shaft (2) is equipped with first bearing (4), the interior perisporium fixed connection of cap (3) is right with the water conservancy diversion in the outer lane of first bearing (4).

3. The turbine high-frequency percussion drill for oil drilling according to claim 1, wherein: the fixed cover in top outside of eccentric main shaft (2) is equipped with first sealing (5), the interior perisporium of the outer lane of first sealing (5) and water conservancy diversion righting cap (3) is closely laminated.

4. The turbine high-frequency percussion drill for oil drilling according to claim 1, wherein: the outer side of the bottom of the eccentric main shaft (2) is fixedly sleeved with a second bearing (9), and the outer ring of the second bearing (9) is fixedly connected with the inner peripheral wall of the upper section of the lower drill collar (8).

5. The turbine high-frequency percussion drill for oil drilling according to claim 1, wherein: the outer side of the bottom of the eccentric main shaft (2) is fixedly sleeved with a second sealing part (10), and the outer ring of the second sealing part (10) is tightly attached to the inner peripheral wall of the upper section of the lower drill collar (8).