CN207033983U - A kind of universal joint bearing of dynamic guiding type rotary steering drilling tool - Google Patents

Abstract

The utility model discloses a universal joint bearing of a dynamic pointing rotary steering drilling tool, which comprises a spherical shell, steel ball I, guide frame, steel ball II and a spherical sleeve installed in a rotating outer casing, the spherical shell, the guide frame and the spherical sleeve. The spherical sleeve is installed on the guide shaft with a liquid flow channel in the middle; between the spherical shell and the guide frame, and between the guide frame and the spherical sleeve through sliding cooperation of steel balls, the guide frame, the spherical shell and the spherical sleeve slide relative to each other to realize the guiding The function of shaft swing guidance can realize the precise control of the wellbore trajectory, and at the same time, it has rapid response, high reliability and good stability.

Description

Universal joint bearing of a dynamic pointing rotary steerable drilling tool

technical field

The utility model patent relates to a rotary steerable drilling tool used in drilling fields such as oil and natural gas, in particular to a universal joint bearing of a dynamic pointing rotary steerable drill tool.

Background technique

Rotary steerable drilling tools need to continuously adjust the azimuth angle of the drill bit to achieve wellbore trajectory steering during the drilling process, especially for dynamic pointing rotary steerable drilling tools, which change the direction of the drill bit by deflecting the deflection of the steering shaft. At this time, a force-transmitting joint bearing of a rotary steerable drilling tool that can transmit torque, change direction arbitrarily, and transmit drilling pressure is required.

In China, Tianjin University has developed a new hollow universal joint for rotary steerable drilling and a universal joint for rotary steerable drilling. These two types of universal joints share the structure of the universal joint fork and the cross shaft; the upper and lower through-through fluid passages are formed inside the universal joint to realize the transmission of drilling fluid in the universal joint, but the tool assembly is complicated, and the drilling fluid may Will corrode the gimbal.

Utility model content

In order to overcome the existing problems of existing tools, the purpose of this utility model is to provide a universal joint bearing of a dynamic pointing rotary steerable drilling tool with simple structure, fast response speed, high reliability and stability, which changes the traditional rotary steerable drilling tool. The stress of the tool bearing has a longer life and is not affected by the corrosion of the drilling fluid.

In order to achieve the above object, the technical scheme of the utility model is:

A universal joint bearing of a dynamic pointing rotary steerable drilling tool, including a spherical shell installed in a rotating outer casing, steel ball I, guide frame, steel ball II, spherical sleeve and guide shaft;

The spherical shell, guide frame and spherical sleeve are installed on the guide shaft with a liquid flow channel in the middle, and a drill bit is connected to one end of the guide shaft;

A plurality of steel balls I are installed between the spherical shell and the guide frame in the circumferential direction to enable the two to slide relative to each other in the radial direction. The spherical shell and the guide frame are slidably fitted through the steel balls I. A plurality of steel balls II are installed along the circumferential direction to enable the two to slide relative to each other in the radial direction. The guide frame and the spherical sleeve are slidably matched through the steel ball II; the spherical shell and the spherical sleeve are fixedly connected with the rotating outer sleeve, and the guide frame is fixedly installed on On the guide shaft, there is a gap for the guide shaft to swing between the spherical shell and the spherical sleeve and the guide shaft, and a gap for the guide frame to swing between the guide frame and the rotating outer sleeve; the side of the spherical shell close to the drill bit is provided with Sealing structure, the sealing structure is installed in the centralizer, one side of the sealing structure is fixedly connected with the rotating jacket, and the other side is fixedly connected with the centralizer;

Between the spherical shell and the guide frame, between the guide frame and the spherical sleeve, the steel ball I and the steel ball II slide and cooperate to make the guide frame slide relative to the spherical shell and the spherical sleeve, and realize the function of the guide shaft swinging and guiding. The guide frame and the spherical The sliding track between the shell and the spherical sleeve is a circular arc.

Further, the two sides of the guide frame are two spherical surfaces with the same convex direction, the outer spherical surface of the guide frame cooperates with the spherical shell, the inner spherical surface of the guide frame cooperates with the spherical sleeve, and the matching surfaces of the spherical shell and the spherical sleeve and the guide frame are all spherical surfaces; The inner and outer spherical surfaces of the guide frame are equally divided into multiple grooves in the circumferential direction, and the spherical surface of the spherical shell and the spherical sleeve is provided with ball sockets corresponding to the positions of the guide frame grooves. Steel balls I and II are respectively installed on the spherical In the ball socket of the shell and the spherical sleeve, the channel is in conjugate contact with the steel ball; the spherical shell and the spherical sleeve transmit the torque generated by the rotating sleeve to the guide frame through the steel ball I and the steel ball II.

Furthermore, the guide frame is installed on the guide shaft through splines and screws; the outer splines on the guide shaft cooperate with the inner splines on the guide frame, and finally the torque generated by the rotating outer sleeve is transmitted to the guide shaft to drive the drill bit to break rock.

Furthermore, there are three threaded holes evenly distributed on the guide frame, and three threaded holes are evenly distributed on the surface of the guide shaft, and three screws are inserted into the threaded holes to fix the guide frame on the guide shaft, and the torque is transmitted to the guide shaft through the screws, and finally the drilling pressure It is transmitted to the drill bit to break the rock through the guide shaft.

Further, there are 8 identical lower semicircular grooves evenly distributed on the outer peripheral surface of the spherical sleeve, and there are 8 identical upper semicircular grooves inside the rotating jacket matched with the spherical sleeve, and the upper and lower grooves cooperate to form a complete circle. Shaped, 8 cylindrical pins are respectively inserted into these 8 circular grooves, and the torque of the rotating outer sleeve is transmitted to the spherical sleeve.

Furthermore, 12 channels are evenly distributed on the spherical surfaces on both sides of the guide frame, and 12 ball sockets corresponding to the positions of the channels are respectively provided on the spherical surfaces of the spherical shell and the spherical sleeve.

The utility model has positive effect and is:

The universal joint bearing of the dynamic pointing type rotary steerable drilling tool of the utility model includes a spherical shell, steel ball I, guide frame, steel ball II and spherical sleeve installed in the rotating outer casing in sequence, and the spherical shell, guide frame and spherical sleeve are installed On the guide shaft with a liquid flow channel in the middle; between the spherical shell and the guide frame, and between the guide frame and the spherical sleeve through sliding cooperation of steel balls to make the guide frame slide relative to the spherical shell and the spherical sleeve to realize the swing guidance of the guide shaft The function can realize the precise control of the wellbore trajectory, and at the same time, it has fast response, high reliability and good stability.

The universal joint bearing is only composed of the main components such as the spherical shell in the rotating outer casing, the guide frame and the spherical sleeve. It flows through, and the drilling fluid does not pass through the inside, which ensures that the tool works in a dry and closed environment, avoids the erosion of drilling fluid, and prolongs the service life of the tool.

Further, the utility model connects the universal joint bearing parts through steel balls, and the parts are respectively provided with ball sockets and grooves. The spherical shell and the spherical sleeve transmit the torque to the guide frame through the steel ball I and the steel ball II, and the drill bit can be flexibly changed. The direction of the force transmission joint bearing is also changed at the same time, which has a longer life.

Further, the utility model respectively connects the universal joint bearing parts through steel balls, and the parts are respectively provided with ball sockets and channels. The grooves and grooves are evenly distributed, which changes the situation that the bearing ball spacing is large and the fatigue stress distribution of bearing parts is uneven in the past.

Further, the utility model arranges two rows of steel balls, and grooves and ball sockets are respectively distributed on the parts. The cooperation between the parts is through the sliding connection of the steel balls, which can realize the rapidity of guidance. The cooperation between the guide frame and the guide shaft has both splines and screws, so that the tool has high reliability and good stability.

Further, the tool of the utility model is equipped with two rows of steel balls. When performing the guiding function, the steel ball II is used as the fulcrum, and the function of turning the actual drill bit can be realized by fine-tuning the guide shaft part far away from the drill bit by using the principle of leverage.

Description of drawings

Fig. 1 is a schematic diagram of the principle of the utility model

Fig. 2 is the sectional view of A-A place of the utility model

Fig. 3 is the sectional view of B-B place of the utility model

Fig. 4 is the sectional view of C-C place of the utility model

In the figure: 1-centralizer, 2-sealing structure, 3-spherical shell, 4-steel ball Ⅰ, 5-guide frame, 6-screw, 7-steel ball Ⅱ, 8-spherical sleeve, 9-cylindrical pin, 10 -Rotary jacket, 11-guide shaft, 12-spline, 13-drill.

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

Below in conjunction with accompanying drawing, the utility model is described in detail.

Referring to Fig. 1, the universal joint bearing of the dynamic pointing type rotary steerable drilling tool of the present invention includes spherical shell 3, steel ball I4, guide frame 5, steel ball II7 and Spherical set of 8.

A plurality of steel balls I4 are installed between the spherical shell 3 and the guide frame 5 in the circumferential direction to enable the two to slide relative to each other in the radial direction. A plurality of steel balls II7 are installed between the spherical sleeve 8 and the spherical sleeve 8 in the circumferential direction to enable the two to slide relative to each other in the radial direction, and the guide frame 5 and the spherical sleeve 8 are slidably fitted through the steel ball II7; 8 is fixedly connected with the rotating jacket 10, and the guide frame 5 is fixedly installed on the guide shaft 11. There is a gap for the swing of the guide shaft 11 between the spherical shell 3 and the spherical sleeve 8 and the guide shaft 11. Between the guide frame 5 and the rotating jacket 10 There is a gap for the swing of the guide frame 5; the side of the spherical shell 3 close to the drill bit is provided with a sealing structure 2, the sealing structure 2 is installed in the centralizer, one side of the sealing structure is fixedly connected with the rotating outer casing 10, and the other side Fixed connection with centralizer.

Referring to Fig. 1, the torque transmission function is completed by the rotating outer sleeve 10, the universal joint bearing and the parts connecting the bearing and the rotating outer sleeve. A plurality of grooves are equally divided in the circumferential direction. The two sides of the guide frame 5 are two spherical surfaces that are convex in the same direction. The outer spherical surface of the guide frame 5 cooperates with the spherical shell 3, and the inner spherical surface of the guide frame 5 cooperates with the spherical sleeve 8. , the matching surfaces of the spherical shell 3 and the spherical sleeve 8 and the guide frame 5 are all spherical surfaces; the spherical surface of the spherical shell 3 and the spherical sleeve 8 is provided with a ball socket corresponding to the channel position of the guide frame 5, the steel ball I4 and the steel ball II7 Installed in the ball socket of the spherical shell 3 and the spherical sleeve 8 respectively, the groove is in conjugate contact with the steel ball; the spherical shell 3 and the spherical sleeve 8 transmit the torque generated by the rotating sleeve 10 to the guide frame through the steel ball I4 and the steel ball II7 5.

Referring to Fig. 2, the guide frame 5 is installed on the guide shaft 11 through the spline 12 and the screw 6; the outer spline 12 on the guide shaft 11 cooperates with the inner spline on the guide frame 5, and finally transmits the torque generated by the rotating outer sleeve 10 Give guide shaft 11, drive drill bit 13 and carry out breaking rock.

Referring to Fig. 3, the guide frame 5 is evenly distributed with three identical threaded holes, and the axis of the threaded holes is perpendicular to the axis of the cylindrical pin 9, and the surface of the guide shaft 11 is also uniformly distributed with three threaded holes, and three screws 6 are inserted into the guide frame The threaded holes of the upper 5 and the threaded holes of the guide shaft 11 can fix the guide frame on the guide shaft, and can also transmit the torque to the guide shaft 11 by the screw 6, finally driving the drill bit 13 to break the rock.

Referring to Fig. 4, the inner diameter of the centralizer 1 at the rotating sleeve 10 is the same as that of the rotating sleeve 10, and the inner diameter of the spherical sleeve 8 is the same as that of the rotating sleeve 10 at the matching position; 8 identical lower semicircles are evenly distributed on the outer surface of the spherical sleeve 8 Groove, there are 8 identical upper semicircular grooves in the inside of the rotating jacket 10 that cooperates with it, and the upper and lower grooves cooperate to form a complete circle, and the outer diameter of the cylindrical pin 9 is the same as the diameter of the formed circular groove. Eight cylindrical pins 9 are respectively inserted into these eight circular grooves, and the torque of the rotating outer sleeve 10 can be transmitted to the spherical sleeve 8 .

Twelve channels are evenly distributed on the spherical surfaces on both sides of the guide frame 5 , and the spherical surfaces of the spherical shell 3 and the spherical sleeve 8 are respectively provided with 12 ball sockets corresponding to the positions of the channels. The spherical shell 3 and the guide frame 5, the guide frame 5 and the spherical sleeve 8 are slidably fitted by steel balls, and the trajectory of the moving part when the tool performs the guiding function is a circular arc.

Working principle of the utility model:

The torque generated by the rotation of the rotating sleeve 10 is transmitted to the spherical shell 3 and the spherical sleeve 8 through the fixed connection and the cylindrical pin 9, and then transmitted to the guide frame 5 through the steel ball I4 and the steel ball II7, and the guide frame 5 cooperates with the guide shaft 11 The spline 12 and the screw 6 transmit the torque to the guide shaft 11 to drive the drill bit to break the rock.

The drilling pressure exerted by the upper drill string on the rotating casing 10 is transmitted to the spherical casing 8 through the steps matched by the spherical casing 8 and the rotating casing 10, and the spherical casing 8 transmits the drilling pressure to the guide frame 5 through the steel ball II7 matched with it. The frame 5 transmits the drill pressure to the guide shaft 11 through the step and the screw 6 on the spline 12 whose step cooperates with the guide shaft 11, and finally transmits the drill pressure to the drill bit through the guide shaft 11 to break the rock.

The above content is a further detailed description of the utility model in conjunction with specific preferred embodiments. It cannot be determined that the specific embodiment of the utility model is limited to this. Under the premise of the new concept, some simple deduction or replacement can also be made, which should be regarded as belonging to the utility model and the patent protection scope is determined by the submitted claims.

Claims (6)

1. A universal joint bearing of a dynamic pointing rotary steerable drilling tool, characterized in that: it comprises a spherical shell (3), a steel ball I (4), a guide frame (5), Steel ball II (7), spherical sleeve (8) and guide shaft (11); The spherical shell (3), the guide frame (5) and the spherical sleeve (8) are sequentially installed on the guide shaft (11) with a liquid flow channel in the middle, and a drill bit (13) is connected to one end of the guide shaft (11); Between the spherical shell (3) and the guide frame (5), a plurality of steel balls I (4) are installed along the circumferential direction to enable the two to slide relative to each other in the radial direction, and the spherical shell (3) and the guide frame (5) ) Through the sliding fit of the steel ball I (4), a plurality of steel ball II (7) are installed between the guide frame (5) and the spherical sleeve (8) along the circumferential direction to make the two slide relative to each other in the radial direction, and guide The frame (5) and the spherical sleeve (8) are slidably matched through the steel ball II (7); the spherical shell (3) and the spherical sleeve (8) are fixedly connected with the rotating outer sleeve (10), and the guide frame (5) is fixedly installed on the guide shaft (11), there is a gap for the guide shaft (11) to swing between the spherical shell (3) and the spherical sleeve (8) and the guide shaft (11), and a gap is reserved between the guide frame (5) and the rotating outer cover (10). There is a gap for the guide frame (5) to swing; the side of the spherical shell (3) close to the drill bit is provided with a sealing structure (2), and the sealing structure (2) is installed in the centralizer. 10) Fixed connection, the other side is fixedly connected with the centralizer; Between the spherical shell (3) and the guide frame (5), and between the guide frame (5) and the spherical sleeve (8), the steel ball I (4) and the steel ball II (7) are slidably matched, so that the guide frame (5) It slides relative to the spherical shell (3) and the spherical sleeve (8) to realize the function of the guide shaft (11) swinging and guiding. The sliding track between the guide frame (5) and the spherical shell (3) and the spherical sleeve (8) is arc. 2. The universal joint bearing of the dynamic pointing rotary steerable drilling tool according to claim 1, characterized in that: the two sides of the guide frame (5) are two spherical surfaces convex to the same direction, and the outer spherical surface of the guide frame (5) Cooperate with the spherical shell (3), the inner spherical surface of the guide frame (5) cooperates with the spherical sleeve (8), and the mating surfaces of the spherical shell (3) and the spherical sleeve (8) and the guide frame (5) are all spherical; the guide frame (5) The inner and outer spherical surfaces of (5) are provided with a plurality of channels equally divided in the circumferential direction, and the spherical surfaces of the spherical shell (3) and the spherical sleeve (8) are provided with ball sockets corresponding to the channel positions of the guide frame (5). The ball I (4) and the steel ball II (7) are installed in the ball sockets of the spherical shell (3) and the spherical sleeve (8) respectively, and the groove is in conjugate contact with the steel ball; the spherical shell (3) and the spherical sleeve (8) ) transmit the torque generated by the rotating jacket (10) to the guide frame (5) through steel ball I (4) and steel ball II (7). 3. The universal joint bearing of the dynamic pointing rotary steerable drilling tool according to claim 1 or 2, characterized in that: the guide frame (5) is installed on the guide shaft (11) through splines (12) and screws (6) ); the outer spline (12) on the guide shaft (11) cooperates with the inner spline on the guide frame (5), and finally the torque generated by the rotating outer sleeve (10) is transmitted to the guide shaft (11), driving the drill bit ( 13) Rock breaking. 4. The universal joint bearing of the dynamic pointing rotary steerable drilling tool according to claim 3, characterized in that: three threaded holes are evenly distributed on the guide frame (5), and three threaded holes are evenly distributed on the surface of the guide shaft (11) Insert three screws (6) into the threaded holes to fix the guide frame (5) on the guide shaft (11), transmit the torque to the guide shaft through the screws (6), and finally transmit the torque to the drill bit through the guide shaft (11) Rock breaking. 5. The universal joint bearing of the dynamic pointing type rotary steerable drilling tool according to claim 3, characterized in that: the outer peripheral surface of the spherical sleeve (8) is evenly distributed with 8 identical lower semicircular grooves, which are similar to the spherical There are 8 identical upper semicircular grooves inside the rotating jacket (10) matched by the sleeve (8), and the upper and lower grooves cooperate to form a complete circle, and 8 cylindrical pins (9) are respectively inserted into these 8 circular grooves. In the groove, the torque of the rotating sleeve (10) is transmitted to the spherical sleeve (8). 6. The universal joint bearing of the dynamic pointing rotary steerable drilling tool according to claim 3, characterized in that: 12 grooves are evenly distributed on the spherical surfaces on both sides of the guide frame (5), and the spherical shell (3) and Twelve ball sockets corresponding to the positions of the channels are opened on the spherical surface of the spherical sleeve (8).