CN214273506U - Novel rotary guide drilling equipment - Google Patents

Abstract

The utility model provides a novel rotary steering drilling equipment relates to geological drilling equipment technical field, has solved the technical problem that rotary steering instrument mode is single, can't satisfy present direction well drilling demand. The novel rotary guiding drilling equipment comprises a cylinder shell, a pressure control system and a guiding control system, wherein the guiding control system is arranged at one end of the cylinder shell and is in transmission connection with a first connecting rod penetrating through the cylinder shell so as to control the movement of the first connecting rod to realize the guiding of a drill bit; the pressure control system is arranged at one end of the guide control system so as to control the pressure of the drilling fluid flowing through the pressure control system, the guide control system and the cylinder shell; the other end of the first connecting rod is rotatably connected with the cylinder shell through a rotating assembly, and the tail end of the first connecting rod penetrates out of the cylinder shell and then is connected with the drill bit box. The utility model discloses to push away formula and directional formula direction technique and combine together and effectively increase and make oblique angle and reach the promotion to the efficiency of deflecting.

Description

Novel rotary guide drilling equipment

Technical Field

The utility model belongs to the technical field of the geological drilling equipment technique and specifically relates to a novel rotatory direction creeps into equipment is related to.

Background

With the increasing demand of human beings for energy, the exploitation production well gradually develops from a vertical well to an inclined well, a horizontal well and a directional well. Currently, rotary steerable tools are commonly used, including push-on RSS rotary steerable tools and point-on RSS rotary steerable tools.

The push type RSS working principle is that a piston is driven to push against a well wall by utilizing the pressure difference between the inside and the outside of a drill column so as to generate lateral force at a drill bit, the direction of the push against the well wall is adjusted in real time according to a well track control part, and the adjustment of the frequency of beating the well wall by adjusting the piston is equivalent to the realization of the adjustment of the force. Push-type rotary steering build-up rate range is wide, when the bit pressure is small, the build-up rate is high when the stratum is soft, but push-type RSS mainly depends on the lateral cutting capability of the drill bit, the requirement on the drill bit is high, and the efficiency of the steering drilling is low when the drill bit faces the situation of hard or slippery stratum.

Directional RSS makes the drill bit produce the inclination through eccentric structure, thereby guide the weight on bit according to the directional target of boring that creeps into of drill bit realization direction, the build-up rate is stable, can predict the well orbit comparatively accurately, the smooth well body quality of the wall of a well is high, the friction torque of drilling string and the wall of a well has been reduced, need great drill bit corner and the weak drill bit of long gauge protection side cut ability can effectively lead to, and eccentric mechanism most structure complicacy need produce the eccentric force great, it leads to the life-span to be fragile in the pit.

Both push type and directional type have respective advantages and disadvantages, and the structure of a single mode can not well meet the requirement of the current steering drilling, so that the defects of the single structure can be effectively avoided by combining two structures, the mixed structure becomes the current trend, the research and development of the aspect in China are late, and a high deflecting rotary steering drilling tool which can be successfully and commercially applied cannot be developed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel rotatory steering drilling equipment to solve the technical problem that the rotatory steering tool mode that exists is single, can't satisfy present direction well drilling demand among the prior art.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a novel rotary guide drilling device, which comprises a cylinder shell, a pressure control system and a guide control system, wherein the guide control system is arranged at one end of the cylinder shell and is in transmission connection with a first connecting rod penetrating through the cylinder shell so as to control the movement of the first connecting rod to realize the guide of a drill bit; the pressure control system is arranged at one end of the guide control system to control the pressure of the drilling fluid flowing through the pressure control system, the guide control system and the cylinder shell; the other end of the first connecting rod is rotatably connected with the cylinder shell through a rotating assembly, and the tail end of the first connecting rod penetrates out of the cylinder shell and then is connected with the drill bit box.

As a further improvement of the present invention, the guiding control system comprises a guiding housing connected to the cylinder housing, a solid rod and a telescopic rod connected via a universal joint are arranged in the guiding housing, the telescopic rod is connected to the first connecting rod via a universal joint, and the solid rod is connected to the pressure control system via a universal joint; the guide shell is also provided with a guide driving assembly connected with the telescopic rod, and the telescopic rod can be controlled to reciprocate along any radial direction of the guide shell through the guide driving assembly; when the telescopic rod moves in the radial direction, the first connecting rod can be driven to rotate by taking a rotating connection point of the first connecting rod and the cylinder shell as an axis.

As a further improvement of the present invention, the guiding driving assembly includes three grooves arranged along the circumferential direction of the guiding housing, a numerical control device and a hydraulic cylinder control unit arranged in the grooves, a sealing cover covering the top of the grooves, through openings arranged on the guiding housing and corresponding to the three groove positions, a moving block movably arranged on the openings, and a first bearing sleeved outside the telescopic rod and in contact connection with the moving block; the movable block is provided with a concave cavity, one side face of the concave cavity is a wedge-shaped face, a hydraulic rod of the hydraulic cylinder control unit penetrates out of the groove and then extends into the concave cavity and is in contact connection with the wedge-shaped face, and when the hydraulic rod stretches out and retracts, the movable block can move along the radial direction of the guide shell in a reciprocating mode.

As a further improvement, the hydraulic rod end is provided with a roller.

As a further improvement of the utility model, the telescopic link includes a pole and two poles, a pole with connect through cross involute spline structure between two poles.

As a further improvement of the present invention, the pressure control system comprises a pressure-controlled joint, a pressure-controlled outer shell, a pressure-controlled inner tube, a pressure-controlled base, a pressure-controlled block, a spring and a pressure-controlled middle shaft, wherein the pressure-controlled outer shell is connected to the guide outer shell, and the pressure-controlled joint is connected to the end of the pressure-controlled outer shell; the pressure control inner pipe is rotatably connected in the pressure control shell through a second bearing, a third bearing and a fourth bearing; one end of the pressure control inner pipe is closed, and the pressure control base is arranged at the bottom of the inner cavity of the pressure control inner pipe; the pressure control block is movably connected to the pressure control base through the pressure control middle shaft and can be close to or far away from the pressure control base, and the spring is sleeved on the outer side of the pressure control middle shaft and is positioned between the pressure control block and the pressure control base; a first outlet is arranged on the pressure control inner pipe corresponding to the position between the second bearing and the third bearing, and a second outlet is arranged on the pressure control inner pipe corresponding to the position between the third bearing and the fourth bearing; a bypass inlet is axially arranged in the pressure control shell, and a first inlet communicated with the bypass inlet is arranged on the inner wall of the pressure control shell; the pressure-controlled shell is provided with a bypass outlet communicated with the outside, and the inner wall of the pressure-controlled shell is provided with a second inlet communicated with the bypass outlet.

As a further improvement of the utility model, the rotating assembly is in including setting up the ball joint of drum shell tip is in with setting up ball joint portion on the first connecting rod.

As a further improvement of the utility model, the first connecting rod comprises a solid liquid return rod and a hollow ball hinge rod which are arranged in sequence, and the liquid return rod is connected with the telescopic rod through a universal joint; a plurality of liquid inlet holes are formed in the spherical hinge rod along the circumferential direction; the spherical hinge part is arranged on the spherical hinge rod.

As a further improvement of the utility model, a backing plate is arranged on the outer wall of the moving block.

As a further improvement, the end of the pressure-controlled middle shaft is provided with a limit bolt with a specification larger than the outer diameter of the pressure-controlled middle shaft.

The utility model provides a pair of utilize novel rotary steering creeps into equipment and carries out rotary steering's rotary steering method to the drill bit, a serial communication port, including following step:

step 100, pressure control: the method comprises the steps of pressure-stabilizing injection control, overpressure injection control and negative pressure injection control;

(1) and (3) voltage stabilization injection control: the drilling fluid presses a spring through a pressure control block in a pressure control system, the drilling fluid pushes the pressure control block to move under the action of pressure, the spring contracts, and when the pressure reaches a specified range, the drilling fluid enters an annular space defined by a second bearing and a third bearing of a pressure control inner pipe from a first outlet, enters a bypass inlet from a first inlet and then enters subsequent equipment;

(2) controlling overpressure injection: the pressure control block moves backwards continuously along with the increase of the pressure of the drilling fluid, the spring contracts continuously, when the pressure exceeds a specified range, the drilling fluid enters an annular space formed by a third bearing and a fourth bearing of the pressure control inner pipe from the second outlet and enters a bypass outlet at the lower end from the second outlet so as to flow out, and the upper limit of the drilling fluid pressure in the equipment is always maintained above or below a rated value by the drilling fluid discharging equipment;

(3) and (3) controlling the re-pressure injection: when the drilling fluid pressure falls back to the designated range, the pressure control block moves back under the action of the spring, and the system repeats (1) the pressure stabilizing injection control process;

step 200, guiding control:

(1) and (3) guiding and controlling the drill bit: the telescopic link moves to corresponding direction according to turning to needs: under the control of the numerical control device, a hydraulic rod of the hydraulic control unit extends out for a certain length, a roller is arranged at the top of the hydraulic rod, the roller rolls on a wedge-shaped surface in a moving block, one moving block or two moving blocks do translational motion towards the inside of the device under the thrust action of the hydraulic cylinder control unit, a first bearing drives a telescopic rod to move outwards under the pushing action of the moving blocks, and a rod and two rods of the telescopic rod are separated from each other in the translational process, so that the telescopic rod correspondingly extends; the rest two moving blocks or the rest one moving block in the three moving blocks correspondingly move towards the outer side of the equipment by a corresponding distance under the pushing of the first bearing in the retraction process of the hydraulic rod;

after a moving block moving outwards to the equipment contacts a well wall, the whole rotary steering drilling equipment is pushed to generate offset movement to a central line in the well, and the steering drilling of the whole system is realized;

after the telescopic rod is subjected to translational motion, the left end and the right end of the solid rod are respectively subjected to integral angular offset motion under the common constraint of universal joints on the two sides;

after the telescopic rod is subjected to translational motion, the liquid return rod and the spherical hinge rod are subjected to integral angle offset motion under the common constraint of the left-end universal joint and the spherical hinge joint;

the drill bit box generates corresponding angle deviation under the constraint of the spherical hinge rod, and the corresponding drill bit is driven under the action of torque to realize corresponding guiding drilling work;

(2) drilling fluid guiding control: the drilling fluid flows out from the upper end bypass inlet passage, sequentially passes through the inner spaces of the guide shell and the cylinder shell, then enters the inner channel of the spherical hinge rod from the fluid inlet hole of the spherical hinge rod, and is sprayed to a rock stratum to be drilled and cut from the corresponding drill bit through the inner part of the drill bit box.

Compared with the prior art, the utility model following beneficial effect has:

the utility model provides a novel rotatory direction creeps into equipment, compact structure, convenient to use drive the outside cushion of drill bit cooperation through the rotatory mode of voltage-controlled inner tube and promote and realize leading in rotatory creeps into, reach and stably guide the effect in creeping into, can realize controlling instrument deflection angle, can realize three-dimensional direction in 360 planes according to different needs and creep into the operation, improve target rate in deflecting efficiency and the well drilling. Adopt the utility model provides a several kinds of problems in the rotary steering drilling equipment can effectively be improved the background art, and utilize relevant measurement while drilling equipment can realize reaching the purpose along with the accuse of following with the drilling to instrument in real time in the pit, will lean on formula and directional formula direction technique and combine together and can effectively increase the promotion that makes the skew angle reach to the efficiency of deflecting, also realize increasing by a wide margin on the drilling rate, use and effectively shorten the engineering cycle of reality in engineering application, improve the accurate target rate in oil gas reservoir, reduce comprehensive use cost, break the foreign technology monopoly restriction of rotary steering drilling, save a large amount of equipment, the technique cost of renting.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of the rotary steerable drilling apparatus of the present invention;

fig. 2 is a front view of the rotary steerable drilling apparatus of the present invention;

fig. 3 is an AA-direction cross-sectional view of the rotary steerable drilling apparatus of the present invention;

FIG. 4 is an enlarged view of portion B of FIG. 3;

FIG. 5 is an enlarged view of portion C of FIG. 3;

fig. 6 is a left side view of the rotary steerable drilling apparatus of the present invention;

fig. 7 is a right side view of the rotary steerable drilling apparatus of the present invention;

FIG. 8 is a sectional view taken along line DD in FIG. 3;

FIG. 9 is a sectional view taken along direction EE of FIG. 3;

FIG. 10 is a sectional view taken along line FF in FIG. 3;

FIG. 11 is a cross-sectional view of GG of FIG. 3;

fig. 12 is a deflecting schematic diagram of the rotary steerable drilling apparatus of the present invention;

fig. 13 is a guiding control process diagram of the rotary guiding drilling device of the present invention.

FIG. 1 shows a cylindrical housing; 2. a first link; 201. a liquid return rod; 202. a ball hinge rod; 3. a guide housing; 4. a bit box; 5. a universal joint; 6. a solid bar; 7. a telescopic rod; 71. a rod; 72. two rods; 8. a groove; 9. numerical control equipment; 10. a hydraulic cylinder control unit; 11. sealing the cover; 12. a moving block; 13. a first bearing; 14. a roller; 15. a pressure-controlled joint; 16. a voltage controlled housing; 17. a pressure-controlled inner tube; 18. a pressure-controlled base; 19. a voltage control block; 20. a spring; 21. a pressure-controlled middle shaft; 22. a second bearing; 23. a third bearing; 24. a fourth bearing; 25. a first outlet; 26. a second outlet; 27. a bypass inlet; 28. a first inlet; 29. a bypass outlet; 30. a second inlet; 31. a ball joint; 32. a spherical hinge part; 33. a backing plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 and fig. 2, the utility model provides a novel rotary guiding drilling device, which comprises a cylinder shell 1, a pressure control system and a guiding control system, wherein the pressure control system is used for controlling the pressure value of drilling fluid in the rotary guiding drilling device to be within a set range so as to keep the pressure of the drilling fluid stable; the guide control system is used for controlling the guide of a drill bit connected with the rotary guide drilling equipment; specifically, the guiding control system is arranged at one end of the cylinder shell 1 and is in transmission connection with a first connecting rod 2 penetrating through the cylinder shell 1 so as to control the movement of the first connecting rod 2 to realize the guiding of the drill bit, and further, the guiding control system is connected to one end, far away from the drill bit, of the cylinder shell 1; the pressure control system is arranged at one end of the guide control system to control the pressure of the drilling fluid flowing through the pressure control system, the guide control system and the cylinder shell 1, and further, the pressure control system is connected to the end part of the guide control system; the other end of the first connecting rod 2 is rotatably connected with the cylinder shell 1 through a rotating assembly, and the tail end of the first connecting rod 2 penetrates out of the cylinder shell 1 and then is connected with the drill bit box 4.

It should be further noted that the first connecting rod 2 is rotatably connected with the cylinder housing 1 through a rotating component, so that the first connecting rod 2 can rotate in a seesaw manner by taking the rotating component as a fulcrum.

As shown in fig. 3 and 5, as an optional embodiment of the present invention, the guiding control system includes a guiding housing 3 connected to the cylinder housing 1, a solid rod 6 and a telescopic rod 7 connected through a universal joint 5 penetrate through the guiding housing 3, the telescopic rod 7 is connected to the first connecting rod 2 through the universal joint 5, and the solid rod 6 is connected to the pressure control system through the universal joint 5; the guide shell 3 is also provided with a guide driving assembly connected with the telescopic rod 7, the telescopic rod 7 can be controlled to reciprocate along any radial direction of the guide shell 3 through the guide driving assembly, and any radial direction refers to a radial direction of any angle within 360 degrees of the whole circumference of the guide shell 3; when the telescopic rod 7 moves radially, the first connecting rod 2 can be driven to rotate by taking a rotating connection point with the cylinder shell 1 as an axis. Therefore, a lever structure is formed, the rotating connection point of the first connecting rod 2 and the cylindrical shell 1 is a lever fulcrum, and when the first connecting rod 2 positioned on the inner side of the fulcrum, namely in the cylindrical shell 1, descends, the first connecting rod 2 positioned on the outer side rises, and then the drill bit box 4 connected with the first connecting rod is driven to lift and rotate, so that the rotating guide of the drill bit is realized.

As shown in fig. 3, 5 and 6, as an optional embodiment of the present invention, the guiding driving assembly includes three grooves 8 disposed along the circumferential direction of the guiding housing 3, a numerical control device 9 and a hydraulic cylinder control unit 10 disposed in the grooves 8, a sealing cover 11 covering the top of the grooves 8, a through opening disposed on the guiding housing 3 and corresponding to the three grooves 8, a moving block 12 movably disposed on the through opening, and a first bearing 13 disposed outside the telescopic rod 7 and contactably connected to the moving block 12; a concave cavity is formed in the movable block 12, a wedge-shaped surface is formed in one side face of the concave cavity, a hydraulic rod of the hydraulic cylinder control unit 10 penetrates through the groove 8 and then extends into the concave cavity to be in contact connection with the wedge-shaped surface, and when the hydraulic rod stretches and retracts, the movable block 12 can move in a reciprocating mode along the radial direction of the guide shell 3.

Specifically, the numerical control device 9 may adopt a conventional known technology, and may be used to measure an inclination angle, an azimuth angle, and a tool face angle of a downhole tool, and may also perform wireless transmission and instruction reception with a face, and may be connected to the hydraulic cylinder control unit 10 to facilitate the ground to send instructions to the hydraulic cylinder control unit 10 to implement respective control of each hydraulic cylinder actuator, and the numerical control device 9 and the hydraulic cylinder control unit 10 may adopt a conventional known technology, or may be an integral device of a conventional known technology, and may perform time-sharing control on the length of the hydraulic rod pushed out by each hydraulic cylinder control unit 10.

The four bolts fix the sealing cover 11 on the guide shell 3 to seal the inner space of the groove 9, so that the numerical control device 9 and the hydraulic cylinder control unit 10 can be protected to a certain extent.

In order to reduce the possibility that the hydraulic rod abuts against the wedge-shaped surface when stretching and retracting and reduce damage to the wedge-shaped surface, the tail end of the hydraulic rod is provided with a roller 14.

As shown in fig. 7 and 11, further, the telescopic rod 7 comprises a rod 71 and two rods 72, the rod 71 and the two rods 72 are connected through a cross involute spline structure, the involute spline has high strength, and can transmit large torque, and is suitable for torque transmission of the connecting rod inside the rotary steering drilling equipment. Through the connection in this way, the connection between the first rod 71 and the second rod 72 is ensured, and the separation during rotation between the first rod and the second rod can be realized, so that the lengths of the two rods are stretched, and the rotation guide of the telescopic rod 7 can be smoothly carried out.

As shown in fig. 3 and 4, as an optional embodiment of the present invention, the pressure control system includes a pressure-controlled joint 15, a pressure-controlled outer shell 16, a pressure-controlled inner tube 17, a pressure-controlled base 18, a pressure-controlled block 19, a spring 20 and a pressure-controlled middle shaft 21, the pressure-controlled outer shell 16 is connected to the guide outer shell 3, and the pressure-controlled joint 15 is connected to the end of the pressure-controlled outer shell 16; the pressure control inner pipe 17 is rotationally connected in the pressure control shell 16 through a second bearing 22, a third bearing 23 and a fourth bearing 24; one end of the pressure control inner pipe 17 is closed, and the pressure control base 18 is arranged at the bottom of the inner cavity of the pressure control inner pipe 17; the pressure control block 19 is movably connected to the pressure control base 18 through a pressure control middle shaft 21 and can approach or depart from the pressure control base 18, that is, the pressure control block 19 is provided with a through hole, and the diameter of the through hole is larger than that of the pressure control middle shaft 21; the spring 20 is sleeved outside the pressure-controlled middle shaft 21 and is positioned between the pressure-controlled block 19 and the pressure-controlled base 18, one end of the spring 20 is connected with the pressure-controlled base 18, and the other end of the spring 20 is connected with the pressure-controlled block 19; a first outlet 25 is arranged on the pressure control inner pipe 17 corresponding to the position between the second bearing 22 and the third bearing 23, and a second outlet 26 is arranged corresponding to the position between the third bearing 23 and the fourth bearing 24; a bypass inlet 27 is axially arranged in the pressure control shell 16, and a first inlet 28 communicated with the bypass inlet 27 is arranged on the inner wall of the pressure control shell 16; the pressure-controlled housing 16 is provided with a bypass outlet 29 communicating with the outside, and the inner wall thereof is provided with a second inlet 30 communicating with the bypass outlet 29.

Further, the rotating assembly includes a ball joint 31 provided at an end of the cylinder housing 1 and a ball joint 32 provided on the first link 2. With the above structure, the first link 2 is allowed to rotate about the spherical hinge 32.

The ball joint rod 202 and the ball joint 31 may be formed by a conventional method, which can achieve rotation of the ball joint rod 202 in the ball joint 31 and an angular displacement within a range of a small amount.

Furthermore, the first connecting rod 2 comprises a solid liquid return rod 201 and a hollow ball hinge rod 202 which are sequentially arranged, and the liquid return rod 201 is connected with the telescopic rod 7 through a universal joint 5; a plurality of liquid inlet holes are formed in the spherical hinge rod 202 along the circumferential direction; the ball joint 32 is provided on the ball joint rod 202. It should be noted that the liquid return rod 201 and the spherical hinge rod 202 are of an integral structure, and only one end of the same rod is of a solid structure, and the other end of the same rod is of a hollow structure.

As an optional embodiment of the present invention, a pad 33 is disposed on the outer wall of the moving block 12.

The utility model discloses a rotatory steering drilling equipment is realizing that the telescopic link skew drives the drill bit erroneous tendency, the outside wall of a well that promotes of slider makes the equipment skew simultaneously, two kinds of actions carry out the purpose that makes equipment can reach high efficiency syncline and creep into simultaneously, this novel rotatory steering equipment of hybrid has combined the advantage of conventional dependence formula direction and directional formula direction, it has more efficient syncline efficiency to compare with conventional dependence formula steering equipment, it still less to compare required energy consumption with conventional directional formula steering equipment, syncline efficiency is higher.

The concrete connection mode between each component can adopt a pressure-controlled joint 15 to be connected with a pressure-controlled shell 16 through threads; the gasket and the second bearing 22 are fixed in the middle under the action of the pressure-controlled joint 15 and the pressure-controlled shell 16; the third bearing 23 and the fourth bearing 24 of the pressure-controlled inner tube 17 are respectively fixed on two positions of the pressure-controlled inner tube 17 through bolts; the pressure control block 19, the spring 20 and the pressure control base 18 are sequentially installed in the pressure control middle shaft 21 of the pressure control inner pipe 17, and the tail end of the pressure control middle shaft 21 of the pressure control inner pipe 17 is provided with a bolt with the diameter slightly larger than that of the pressure control middle shaft 21, so that the assembly installation is convenient, and the phenomenon that the pressure control middle shaft 21 falls off when the pressure control block 19, the spring 20 and the pressure control base 18 return can be avoided; the pressure-controlled inner pipe 17 is connected with the universal joint 5 by screw threads; the universal joint 5 and the solid rod 6, the solid rod 6 and the universal joint 5, the universal joint 5 and the telescopic rod 7, the telescopic rod 7 and the universal joint 5, the universal joint 5 and the liquid return rod 201, the liquid return rod 201 and the spherical hinge rod 202, and the spherical hinge rod 202 and the drill box 4 are all in threaded connection; the pressure control shell 16 and the guide shell 3, the guide shell 3 and the cylinder shell 1, and the cylinder shell 1 and the ball joint 31 are all in threaded connection; the first bearing 13 is fixed on the telescopic rod 7 by the same method of bolts as the third bearing 23 and the fourth bearing 24 of the pressure control inner pipe 17; the numerical control device 9 and the hydraulic cylinder control unit 10 are fixed in the groove 8 of the guide housing 3 by using bolts, and the four bolts at the upper end of the groove 8 fix the cover 11 on the guide housing 3.

As shown in fig. 8-13, the present invention provides a rotary guiding method for guiding a drill bit by using a novel rotary guiding drilling apparatus, which is characterized by comprising the following steps:

step 100, pressure control: the method comprises the steps of pressure-stabilizing injection control, overpressure injection control and negative pressure injection control;

(1) and (3) voltage stabilization injection control: the drilling fluid pressurizes the spring 20 through the pressure control block 19 in the pressure control system, the drilling fluid pushes the pressure control block 19 to move under the action of pressure, the spring 20 contracts, and when the pressure reaches a specified range, the drilling fluid enters an annular space defined by the second bearing 22 and the third bearing 23 of the pressure control inner pipe 17 from the first outlet 25, enters the bypass inlet 27 from the first inlet 28 and then enters subsequent equipment;

(2) controlling overpressure injection: along with the increase of the pressure of the drilling fluid, the pressure control block 19 moves backwards continuously, the spring 20 contracts continuously, when the pressure exceeds a specified range, the drilling fluid enters an annular space surrounded by a third bearing 23 and a fourth bearing 24 of the pressure control inner pipe 17 from a second outlet 26, enters a bypass outlet 29 at the lower end from a second outlet 30 and flows out, and the drilling fluid is discharged out of the equipment, so that the upper limit of the drilling fluid pressure in the equipment is always maintained above a rated value;

(3) and (3) controlling the re-pressure injection: when the drilling fluid pressure falls back to the designated range, the pressure control block 19 moves back under the action of the spring 20, and the system repeats (1) the pressure stabilizing injection control process;

step 200, guiding control:

(1) and (3) guiding and controlling the drill bit: the telescopic rod 7 moves to the corresponding direction according to the steering requirement: under the control of the numerical control device 9, the hydraulic rod of the hydraulic control unit 10 extends out for a certain length, the top of the hydraulic rod is provided with a roller 14, the roller 14 rolls on a wedge-shaped surface inside the moving block 12, one moving block 12 or two moving blocks 12 perform translational motion towards the inside of the device under the thrust action of the hydraulic control unit 10, the first bearing 13 drives the telescopic rod 7 to move towards the outside of the device under the pushing action of the moving block 12, and the first rod 71 and the second rod 72 of the telescopic rod 7 are separated from each other in the translational process, so that the telescopic rod 7 correspondingly extends; the rest two moving blocks 12 or the rest one moving block 12 in the three moving blocks 12 correspondingly move towards the outer side of the equipment by a corresponding distance under the pushing of the first bearing 13 in the retraction process of the hydraulic rod; here, in step (1), the inside and outside of the apparatus are inward in the direction toward the center of the cylindrical casing 1 and outward in the direction toward the outside of the cylindrical casing 1.

After contacting the well wall, a moving block 12 moving outwards of the device pushes the whole rotary steering drilling device to perform offset movement to the central line in the well, so that the steering drilling of the whole system is realized;

after the telescopic rod 7 is subjected to translational motion, the left end and the right end of the solid rod 6 are respectively subjected to integral angular offset motion under the common constraint of the universal joints 5 on the two sides;

after the telescopic rod 7 performs translational motion, the liquid return rod 201 and the spherical hinge rod 202 perform overall angular offset motion under the common constraint of the left-end universal joint 5 and the spherical hinge joint 31;

the bit box 4 generates corresponding angle deviation under the constraint of the spherical hinge rod 202, and drives the corresponding bit under the action of torque, so that corresponding guiding drilling work can be realized.

(2) Drilling fluid guiding control: the drilling fluid passes through the internal spaces of the guide shell 3 and the cylinder shell 1 in sequence after coming out of the upper end bypass inlet 27, then enters the internal channel of the spherical hinge rod 202 from the liquid inlet hole of the spherical hinge rod 202, and is sprayed to a rock stratum to be drilled and cut from a corresponding drill bit through the interior of the drill bit box 4.

The utility model provides a novel rotatory direction creeps into equipment, compact structure, convenient to use drive the outside cushion of drill bit cooperation through the rotatory mode of voltage-controlled inner tube and promote and realize leading in rotatory creeps into, reach and stably guide the effect in creeping into, can realize controlling instrument deflection angle, can realize three-dimensional direction in 360 planes according to different needs and creep into the operation, improve target rate in deflecting efficiency and the well drilling. Adopt the utility model provides a several kinds of problems in the rotary steering drilling equipment can effectively be improved the background art, and utilize relevant measurement while drilling equipment can realize reaching the purpose along with the accuse of following with the drilling to instrument in real time in the pit, will lean on formula and directional formula direction technique and combine together and can effectively increase the promotion that makes the skew angle reach to the efficiency of deflecting, also realize increasing by a wide margin on the drilling rate, use and effectively shorten the engineering cycle of reality in engineering application, improve the accurate target rate in oil gas reservoir, reduce comprehensive use cost, break the foreign technology monopoly restriction of rotary steering drilling, save a large amount of equipment, the technique cost of renting.

It should be noted that "inward" is a direction toward the center of the accommodating space, and "outward" is a direction away from the center of the accommodating space.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship indicated based on the orientation or positional relationship shown in fig. 1, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The novel rotary guide drilling device is characterized by comprising a cylinder shell, a pressure control system and a guide control system, wherein the guide control system is arranged at one end of the cylinder shell and is in transmission connection with a first connecting rod penetrating through the cylinder shell so as to control the movement of the first connecting rod to realize the guide of a drill bit; the pressure control system is arranged at one end of the guide control system to control the pressure of the drilling fluid flowing through the pressure control system, the guide control system and the cylinder shell; the other end of the first connecting rod is rotatably connected with the cylinder shell through a rotating assembly, and the tail end of the first connecting rod penetrates out of the cylinder shell and then is connected with the drill bit box.

2. The novel rotary steerable drilling device of claim 1, wherein the steering control system comprises a steering housing connected to the cylindrical housing, a solid rod and a telescopic rod connected by a universal joint penetrate through the steering housing, the telescopic rod is connected to the first link by a universal joint, and the solid rod is connected to the pressure control system by a universal joint; the guide shell is also provided with a guide driving assembly connected with the telescopic rod, and the telescopic rod can be controlled to reciprocate along any radial direction of the guide shell through the guide driving assembly; when the telescopic rod moves in the radial direction, the first connecting rod can be driven to rotate by taking a rotating connection point of the first connecting rod and the cylinder shell as an axis.

3. The novel rotary steerable drilling device according to claim 2, wherein the steerable drive assembly comprises three grooves arranged along the circumferential direction of the steerable housing, a numerical control device and a hydraulic cylinder control unit arranged in the grooves, a cover covering the top of the grooves, through openings arranged on the steerable housing and corresponding to the three grooves, a movable block movably arranged on the openings, and a first bearing sleeved outside the telescopic rod and in contact connection with the movable block; the movable block is provided with a concave cavity, one side face of the concave cavity is a wedge-shaped face, a hydraulic rod of the hydraulic cylinder control unit penetrates out of the groove and then extends into the concave cavity and is in contact connection with the wedge-shaped face, and when the hydraulic rod stretches out and retracts, the movable block can move along the radial direction of the guide shell in a reciprocating mode.

4. The novel rotary steerable drilling apparatus of claim 3, wherein the hydraulic rod is provided with rollers at the end.

5. The novel rotary steerable drilling apparatus of claim 2, wherein the telescoping rod comprises a rod and two rods connected by a crisscross spline structure.

6. The novel rotary steerable drilling device of claim 2, wherein the pressure control system comprises a pressure-controlled joint, a pressure-controlled outer casing, a pressure-controlled inner tube, a pressure-controlled base, a pressure-controlled block, a spring and a pressure-controlled middle shaft, the pressure-controlled outer casing is connected to the guide outer casing, and the pressure-controlled joint is connected to the end of the pressure-controlled outer casing; the pressure control inner pipe is rotatably connected in the pressure control shell through a second bearing, a third bearing and a fourth bearing; one end of the pressure control inner pipe is closed, and the pressure control base is arranged at the bottom of the inner cavity of the pressure control inner pipe; the pressure control block is movably connected to the pressure control base through the pressure control middle shaft and can be close to or far away from the pressure control base, and the spring is sleeved on the outer side of the pressure control middle shaft and is positioned between the pressure control block and the pressure control base; a first outlet is arranged on the pressure control inner pipe corresponding to the position between the second bearing and the third bearing, and a second outlet is arranged on the pressure control inner pipe corresponding to the position between the third bearing and the fourth bearing; a bypass inlet is axially arranged in the pressure control shell, and a first inlet communicated with the bypass inlet is arranged on the inner wall of the pressure control shell; the pressure-controlled shell is provided with a bypass outlet communicated with the outside, and the inner wall of the pressure-controlled shell is provided with a second inlet communicated with the bypass outlet.

7. The novel rotary steerable drilling apparatus of claim 2, wherein the rotating assembly comprises a ball joint disposed at the end of the cylindrical housing and a ball joint disposed on the first link.

8. The novel rotary steerable drilling device of claim 7, wherein the first link comprises a solid return rod and a hollow sphere hinge rod arranged in sequence, and the return rod is connected with the telescopic rod through a universal joint; a plurality of liquid inlet holes are formed in the spherical hinge rod along the circumferential direction; the spherical hinge part is arranged on the spherical hinge rod.

9. The novel rotary steerable drilling device of claim 3, wherein a backing plate is disposed on the outer wall of the moving mass.

10. The novel rotary steerable drilling device as in claim 6, wherein the end of the pressure-controlled middle shaft is provided with a limit bolt with a specification larger than the outer diameter of the pressure-controlled middle shaft.

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