CN210105754U

CN210105754U - Drill bit slip vibration protection device

Info

Publication number: CN210105754U
Application number: CN201920092303.9U
Authority: CN
Inventors: 李文飞; 周延军; 梁明月; 丁香春; 么贵民
Original assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Current assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Priority date: 2019-01-20
Filing date: 2019-01-20
Publication date: 2020-02-21
Anticipated expiration: 2029-01-20

Abstract

The utility model relates to a drill chuck slip vibration protection device, which comprises an outer shell, a turbine, a spring device, a flow deflector and a movable valve; wherein: the water conservancy diversion piece of turbine is installed downtheholely at turbine axle center, the turbine top be equipped with shell body rotary seal complex boss, the shell body lower part be equipped with turbine bottom rotary seal complex boss, turbine lower part processing helical spline moves the valve and is equipped with the boss, the boss of shell body is spacing to the boss of moving the valve, move and go up processing locating pin on the valve, the helical spline meshing on locating pin and the turbine, spring assembly sets up outside the turbine between boss and the valve. The drill bit slip vibration protection device has the characteristics of pressure reduction, obvious effect and the like, can completely meet the drilling process requirements of complex structural wells such as domestic vertical wells, directional wells, horizontal wells and the like, and is a novel tool with simple structure, convenient operation, low cost, safety and reliability.

Description

Drill bit slip vibration protection device

Technical Field

The utility model discloses a smooth vibration protector of drill bit card relates to oil and gas well drilling, coal bed gas well drilling, geological exploration, mine probing device field.

Background

With the development of the national economic industry, the proportion of deep well ultra-deep well exploration and development is gradually increasing. As the well depth increases, the hardness and plasticity of the rock increase, the drillability deteriorates, the drilling rate decreases, and the field drilling data show that the average drilling rate of the deep well section is only 15-30% of that of the upper well section, and is even lower than 8% in partial areas. Measurement data while drilling shows that in a deep hard formation, severe rotation speed and torque fluctuation is accompanied at a drill bit, and the clamping and sliding vibration of a system has great influence on drilling. Stick-slip vibration is characterized by alternate occurrence of sticking and slipping of the drill bit: in the clamping stagnation stage, the drill bit stops rotating due to insufficient rock breaking torque, the drill string is continuously twisted under the driving of the rotary table, and when the accumulated energy of the drill string is enough to break the rock stratum, the clamped drill bit slips; and in the slipping stage, the energy accumulated by the drill string is released instantly, the drill bit is accelerated and decelerated suddenly in the positive and negative directions, the angular speed of the drill bit is several times of the rotating speed of the rotary table, and the torque of the drill bit, which is blocked by the rock stratum, fluctuates violently. The mechanical drilling speed is reduced due to the clamping and sliding vibration, the drill bit oscillates back and forth along the axis of the drill string after the drill string is released, and the drill bit is impacted irregularly, so that the failure is accelerated. The stick-slip vibration is the main cause of the dysfunction of the drilling well, and the main effects on the drilling engineering include: (1) the abrasion of the bit is increased, and the failure of the bit is accelerated by the instant high-speed impact motion of the PDC bit; (2) the drill bit disordered movement caused by the clamping and sliding vibration reduces the drilling and rock breaking energy efficiency, and consumes the energy provided by the underground driving device of the drilling machine; (3) the clamping and sliding vibration and other caused vibration accelerate the fatigue failure or thread gluing of the lower drilling tool assembly and cause the early failure of the downhole electronic instrument; (4) the drilling continuity and the well body quality are reduced, the pure drilling time and the tripping times are increased, and the drilling efficiency is reduced. In conclusion, the slip vibration phenomenon generally exists when drilling a deep well, a well with a complex structure and the like, the drilling is seriously influenced, a large amount of manpower, material resources and cost are wasted, and how to solve the slip vibration problem of drilling becomes a hot point of research and development at home and abroad.

Domestic and foreign researches and field drilling practices prove that in the drilling process, a high-frequency shock vibration effect in the circumferential direction is applied to the drill bit, the phenomenon of drill bit slipping vibration can be effectively inhibited, and the drilling and rock breaking efficiency can be greatly improved. The most typical representative of the method is that Torbuster tools are used by Ultra corporation in Canada in 2000 to be matched with PDC drill bits, circumferential pulse torque is applied to the drill bits at the frequency of 1000-2400 min < -1 > to break rock, the drill bit skid vibration is effectively inhibited, the service life of the drill bits is prolonged, the application range of the PDC drill bits is expanded, the mechanical drilling speed is greatly increased, the method is widely applied to North America, Asia-Pacific, middle east and Africa, the mechanical drilling speed can be increased by 50% -300%, the single trip footage of a well section with a medium depth can reach 3000m, and the single trip footage of an ultra-deep well section with a deep well can reach 1500 m. The Torbuster tool drilling technology has been tested and popularized in a plurality of blocks on land and at sea in China, a good speed-up effect is achieved in drilling deep wells and hard strata, and the mechanical drilling speed is increased by 90-300%. Many colleges and universities and research units in China have carried out analytical research to Torbuster instrument principle, and the relevant instrument of development all is similar to its structural principle basically, mainly utilizes drilling fluid energy to make the pendulum reciprocating motion to produced the circumference on the drill bit and beaten the vibration effect, if: CN201810496627.9, CN201310586179.9, CN201610321016.1, CN201310698227.3, CN201310014444.6, CN201310108104.X, CN201410306930.X and CN201510166838.2, but in practical application, the reciprocating oscillating principle is found to provide a forward oscillation effect and simultaneously generate a reverse oscillation effect, the reverse oscillation not only consumes the energy of drilling fluid, but also is ineffective for inhibiting the drill bit from skidding and vibrating and is not beneficial to improving the rock breaking efficiency of the drill bit, and meanwhile, the reciprocating oscillating oscillation principle also has the defect of high pressure consumption, so that the domestic existing mechanical pump equipment is in a high-load state for a long time and is easy to cause equipment damage, the size of a developed tool is long, the requirements of drilling technologies such as a directional well, a well with a complex structure and the like cannot be met, and the application range is limited; therefore, related domestic mechanisms propose a structure of a rotary vibration principle, such as: CN201810257135.4, CN201420040141.1, CN201620602560.9, CN200910058083.9 and CN201610399777.9, and analysis shows that although the high pressure consumption of the reciprocating swing type principle is improved by the rotary vibration principle, the requirement on the processing precision is high, the heat treatment process of the part material is complex, the service life is short, and therefore the requirement on the domestic drilling technology cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, provide one kind and can effectively restrain the smooth vibration of card among the drilling process, can produce the circumference shock effect of high frequency low amplitude again to have characteristics such as the pressure loss is little, simple structure, with low costs, satisfy drilling technology requirements such as vertical well, directional well, complex construction well simultaneously and the smooth vibration protector of drill bit card that has the drilling equipment requirement.

The utility model provides a technical scheme that its technical problem adopted is:

the drill bit slip vibration protection device comprises an outer shell, a turbine, a spring device, a flow deflector and a movable valve; wherein: the water conservancy diversion piece of turbine is installed downtheholely at turbine axle center, the turbine top be equipped with shell body rotary seal complex boss, the shell body lower part be equipped with turbine bottom rotary seal complex boss, turbine lower part processing helical spline moves the valve and is equipped with the boss, the boss of shell body is spacing to the boss of moving the valve, move and go up processing locating pin on the valve, the helical spline meshing on locating pin and the turbine, spring assembly sets up outside the turbine between boss and the valve.

The above scheme further comprises:

the movable valve boss and the shell boss are wedge-shaped.

And an upper sealing device and a lower sealing device are arranged between the turbine and the outer shell.

And lubricating oil is filled in the space where the spring device and the movable valve are positioned.

The movable valve bosses, the positioning pins and the spiral splines are two or more groups and are circumferentially and uniformly distributed.

The field test proves, the utility model discloses a smooth vibration protector of drill chuck restraines the smooth vibration effect of drill chuck and is showing very much, statistical data shows, drilling efficiency improves 91.6% -268.9% on average, the average footage of single drill bit improves 51% -96%, especially when drilling in the rock stratum more than the well hardness, the effect of speeding up is showing more, and the drilling quality accords with the design standard, reached on the basis of domestic current equipment and process technology, low cost, the purpose of well drilling construction is accomplished to the high efficiency, because the smooth vibration protector of drill chuck has the pressure to consume lowly, the effect of speeding up is showing, low in use cost, advantages such as safe and reliable, the high evaluation of field usage unit has been obtained.

Drawings

FIG. 1 is a schematic view of a drill chuck slip vibration guard.

FIG. 2 is a schematic view of a valve configuration of the drill bit slip vibration guard of FIG. 1.

FIG. 3 is a schematic view of a boss structure inside the outer housing of the drill slip vibration protector of FIG. 1.

FIG. 4 is a schematic view of a turbine spiral spline structure of the drill bit slip vibration prevention device of FIG. 1.

In the figure, 1-outer shell, 2-turbine, 3-upper sealing device, 4-spring device, 5-deflector, 6-movable valve, 7-helical spline, 8-lower sealing device and 9-locating pin.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

Referring to fig. 1-4, a drill bit slip vibration protection device comprises a security outer shell 1, a turbine 2, a spring device 4, a flow deflector 5 and a movable valve 6; wherein: the guide vane 5 of turbine 2 installs downtheholely in 2 axle centers of turbine, 2 tops of turbine are equipped with 1 rotary seal complex boss of shell body, 1 lower parts of shell body be equipped with 2 bottom rotary seal complex bosses of turbine, 2 lower parts processing helical spline 7 of turbine, be equipped with the boss on the valve 6 moves, the boss of shell body 1 is spacing to the boss of valve 6, move and process locating pin 9 on the valve 6, locating pin 9 meshes with the helical spline 7 on the turbine 2, spring assembly 4 sets up between 2 outer bosses of turbine and valve 5.

The boss of the movable valve 6 and the boss of the outer shell 1 are wedge-shaped.

The bosses of the movable valve 6, the positioning pins 9 and the spiral splines 7 are two or more groups and are uniformly distributed in the circumferential direction.

Example 2

As shown in fig. 1-4, a drill bit slip vibration protection device mainly comprises an outer shell 1, a turbine 2, a sealing device 3, a spring device 4, a flow deflector 5, a movable valve 6, a helical spline 7 and a positioning pin 9. The turbine 2 is arranged in the outer shell 1, the sealing device 3 is arranged between the turbine 2 and the outer shell 1, and the spring device is arranged between the turbine 2 and the movable valve 6. The guide vane 5 is arranged in the turbine 2, the spiral spline 7 is processed at the lower part of the turbine 2, the positioning pin 9 is processed on the movable valve 6, and the positioning pin 9 is meshed with the spiral spline 7.

The space where the spring device 4 and the valve 6 are located is filled with lubricating oil. The bosses of the movable valve 6 are two or more groups and are uniformly distributed in the circumferential direction. The boss of the movable valve 6 and the boss of the outer shell 1 are wedge-shaped, two or more groups of positioning pins 9 are uniformly distributed in the circumferential direction, two or more groups of spiral splines 7 are uniformly distributed, and the positioning pins 9 are engaged with the spiral splines 7 in a matching manner.

The drill bit slip vibration protection device is arranged on the upper portion of a drill bit, drilling fluid enters the drill bit slip vibration protection device and then enters the turbine 2 in the drilling process, the drilling fluid drives the turbine 2 to rotate at a high speed under the action of the guide vanes 5, and the turbine 2 drives the movable valve 6 to rotate at a high speed due to the fact that the movable valve 6 is meshed with the spiral spline 7 on the turbine 2. Because the boss is processed on the movable valve 6 and the boss is also processed on the inner wall of the outer shell 1, under the action of the spring device 4, the movable valve 6 is kept in a contact state with the boss of the outer shell 1, and the boss of the outer shell 1 is circumferentially limited relative to the boss of the movable valve 6. When the boss of the valve 6 rotates into contact with the boss of the outer housing 1, a circumferential shock effect is generated and transmitted to the drill bit through the outer housing 1. At the same time, the boss of the outer shell 1 limits the rotary motion of the valve 6, a speed difference is generated between the two, and the turbine 2 continues to rotate at high speed under the driving of the drilling fluid, so that under the meshing action of the positioning pin 9 and the helical spline 7, the valve 6 moves upwards along the helical spline 7 and compresses the spring device 4. When the boss of the movable valve 6 is separated from the boss of the outer shell 1 and moves upwards for a certain distance, the boss of the outer shell 1 contacts the boss of the movable valve 6 in a circumferential limiting mode, the movable valve 6 rapidly moves downwards under the action of restoring force of the spring device 4 and contacts with the boss of the outer shell 1, and the movable valve 6 continues to rotate under the action of the spiral spline 7 of the turbine, namely the movable valve 6 is in a combined motion state of axial and rotation. As the turbine 2 rotates, the valve 6 cam again comes into contact with and collides with the cam of the outer housing 2, and the above-described operation is repeated, thereby generating a circumferential shock effect under a continuous rotation condition.

The shock frequency is closely related to the rotating speed of the turbine 2, and the rotating speed of the turbine 2 is high, so that the shock frequency generated by the movable valve 6 is also high, the shock frequency can be adjusted according to requirements, only the turbine needs to be replaced, and the shock frequency control device is very convenient.

The utility model provides a smooth vibration protector of drill bit card can realize the high frequency low amplitude effect of shocking under the continuous rotation condition, not only can effectively restrain smooth vibration of drill bit card, inner structure and appearance size also further reduce the simplification than reciprocal oscillating structure, the drilling fluid energy of consumption is lower, consequently, can satisfy the requirement of complex construction well drilling technologies such as internal straight well, directional well, the extended reach well, horizontal well, promptly on the basis that accords with current drilling technology and equipment, can produce high frequency low amplitude circumference effect of shocking vibration and restrain smooth vibration of drill bit card, can assist the broken rock efficiency of improvement drill bit again, the development to the deep oil and gas resources mineral products of china has important meaning.

Claims

1. The drill bit slip vibration protection device comprises an outer shell (1), a turbine (2), a spring device (4), a flow deflector (5) and a movable valve (6); the method is characterized in that: install at turbine (2) axle center downthehole flow deflector (5) of turbine (2), turbine (2) top is equipped with the boss with shell body (1) rotary seal complex, shell body (1) lower part be equipped with turbine (2) bottom rotary seal complex boss, turbine (2) lower part processing helical spline (7), be equipped with the boss on moving valve (6), the boss of shell body (1) is spacing to the boss of moving valve (6), processing locating pin (9) on moving valve (6), helical spline (7) meshing on locating pin (9) and turbine (2), spring assembly (4) set up between turbine (2) outer boss and moving valve (6).

2. The drill bit slip vibration guard of claim 1, wherein: the boss of the movable valve (6) and the boss of the outer shell (1) are wedge-shaped.

3. The drill bit slip vibration guard of claim 1 or 2, wherein: an upper sealing device (3) and a lower sealing device (8) are arranged between the turbine (2) and the outer shell (1).

4. The drill bit slip vibration guard of claim 3, wherein: and lubricating oil is filled in the space where the spring device (4) and the movable valve (6) are positioned.

5. The drill bit slip vibration guard of claim 4, wherein: the bosses of the movable valve (6), the positioning pins (9) and the spiral splines (7) are two or more groups and are uniformly distributed in the circumferential direction.