CN214576814U

CN214576814U - Universal joint for rotary steering drilling

Info

Publication number: CN214576814U
Application number: CN202120880611.5U
Authority: CN
Inventors: 赵海茜; 胡东泽
Original assignee: Sichuan Zhong'an Jiasheng Petroleum Technology Co ltd
Current assignee: Sichuan Zhong'an Jiasheng Petroleum Technology Co ltd
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2021-11-02
Anticipated expiration: 2031-04-27

Abstract

The utility model discloses a rotary steering universal joint for well drilling, which comprises a rotary mandrel, wherein the joint at the front end and the rear end of the rotary mandrel is movably provided with a universal joint, the universal joint comprises a shaft body and a plurality of groups of shaft sleeves, each group of shaft sleeves is movably sleeved on the shaft body, in the utility model, the traditional shaft sleeves are directly contacted with a shaft rod and are converted into point contact between a ball and a second groove, the contact area is greatly reduced, when the ball rotates along the second groove, an oil can at the top end lubricates the second groove through the ball, the friction force of the ball is further reduced, the universal joint is protected, the universal joint is prevented from being structurally damaged under long-time service pressure, a support plate and a convex structure can play the role of fixing the shaft sleeves, the convex structure is clamped in the first groove, and can rotate along the dent of the first groove in the rotating process, when the side is stressed, the fixing effect is not influenced, and the side is convenient to disassemble.

Description

Universal joint for rotary steering drilling

Technical Field

The utility model relates to a drilling equipment technical field, concretely relates to universal joint for rotary steering well drilling.

Background

The task of drilling a borehole from the surface using mechanical equipment or manual labor is known as drilling. Generally refers to the engineering of drilling boreholes and large diameter water-supply wells for the exploration or exploitation of liquid and gaseous minerals such as oil, gas, and the like. The application of the well drilling in national economic construction is very wide, the oil (gas) field in China is widely drilled by using a rotary disc drill at present, GT4-G is a core component of a rotary guide system, the control principle is that a pump drives hydraulic oil, the regulated hydraulic oil is transmitted to the position below a rib plate through regulation of a pressure regulating valve, and therefore the purpose of guiding is achieved by the different pressures of the three rib plates. The Auto Trak GT4-G steering tool is formed by connecting two major parts of a non-rotating outer sleeve and a rotating mandrel through an upper bearing and a lower bearing to form a structure capable of rotating relatively. The rotary mandrel is connected with a drill string and a drill bit, and plays a role in transmitting bit pressure and torque and conveying drilling fluid.

And in the transmission in-process, the shaft type universal joint of cross in the rotatory mandrel has simple structure, the advantage that transmission efficiency is high, but the general direct cover of the axle sleeve of current shaft universal joint is established on the surface of spindle nose, the axle sleeve only relies on the spindle nose with the cross axis body to reach the purpose of being connected, long-time back spindle nose easily with the fracture of cross axis body, lead to the damage of shaft universal joint, thereby its life has been reduced, the practicality is lower, how to improve the practicality and the increase of service life of universal joint, it is the difficult problem that technical staff in the field need to fight against soon.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rotary steering universal joint for well drilling, the general direct cover of axle sleeve of solving current cross axle universal joint is established on the surface of spindle nose, and the axle sleeve only relies on the spindle nose to reach the purpose of being connected with the cross axis body, and the spindle nose is easy to be cracked with the cross axis body after long-time the use, leads to the cross axle universal joint to damage to its life problem has been reduced, the purpose that reaches improvement practicality and increase of service life is reached.

The utility model discloses a following technical scheme realizes:

the utility model provides a rotary steering universal joint for well drilling, includes rotatory mandrel, the activity of the preceding rear end junction of rotatory mandrel is provided with the universal joint, including axis body and multiunit axle sleeve, every group in the universal joint the equal movable sleeve of axle sleeve is located on the axis body, and the utility model discloses in, the point contact between ball and the second recess has greatly reduced area of contact, and when the ball rotated along the second recess, the oilcan on top can further reduce the frictional force of ball in can passing through the lubricated second recess of spin, and extension board and protruding structure can play the effect of fixed axle sleeve. The specific implementation is as follows.

The user firstly fixes the shaft sleeve on the shaft body, and then fixes the universal joint and the joint forks at the front end and the rear end of the rotating mandrel, on the premise of meeting the rotating drive of the shaft body, the strength and the stability of the structure are improved, in the utility model, the traditional shaft sleeve is directly contacted with the shaft rod to be converted into the point contact between the ball and the second groove, the contact area is greatly reduced, when the ball rotates along the second groove, the oil pot at the top end can lubricate the second groove through the rolling ball, the friction force of the ball is further reduced, the universal joint is protected, the structural damage of the universal joint under the long-time service pressure is avoided, the support plate and the convex structure can play the role of fixing the shaft sleeve, the convex structure is clamped in the first groove, and in the rotating process, the universal joint can rotate along the dent of the first groove, when the side is stressed, the fixing effect is not affected, and the disassembly is convenient.

And wherein the four corners of axis body all outwards is provided with the axostylus axostyle, and every group the outside surface of axostylus axostyle has seted up first recess and second recess from top to bottom in proper order. The shaft lever has the effect of uniform stress, and the first groove and the second groove are convenient to fix, so that the structural stability is improved.

The oil can is arranged on the outer side of the shaft sleeve, a sealing plug is arranged on the outer side of the oil can, and a ball is movably arranged at the bottom end of the oil can. After the shaft sleeve and the shaft body are fixed, lubricating liquid in the oil can lubricate the second groove through the ball, so that the friction force between the second groove and the second groove is reduced, and the practical service life of the universal joint is prolonged; the bottom end of the ball is arranged in the second groove, and the size of the shaft rod is matched with the size of the outer edge of the shaft sleeve. The second groove has the effect of being matched with the support plate and the protruding structure for fixing, and a user can conveniently fix and disassemble the support plate and the protruding structure.

The tail end of the support plate is inwards provided with a protruding structure, and the size of the first groove is matched with the protruding structure. The fixing is convenient for a user to fix, and the structural stability is improved; and joint forks are arranged on two sides of the rotating mandrel, and the front end and the rear end of the rotating mandrel are fixedly connected with the universal joint through the joint forks. The installation and fixation are convenient for users.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1. the utility model discloses in, through with traditional axle sleeve and axostylus axostyle direct contact, turn into the point contact between ball and the second recess, very big reduction area of contact, and when the ball rotates along the second recess, the oilcan on top can further reduce the frictional force of ball in can passing through spin lubrication second recess, the cross axle universal joint has been protected, avoided the universal joint under long-time service pressure, cause structural damage, and extension board and protruding structure can play the effect of fixed axle sleeve.

2. The utility model provides an in the first recess is established into to protruding structure card, at the pivoted in-process, can rotate along the indenture of first recess, during the side atress, is not influenced fixed effect, convenient dismantlement.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

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

FIG. 2 is a schematic structural view of a gimbal;

FIG. 3 is a front view of the construction of the gimbal;

fig. 4 is a schematic structural diagram at a in fig. 3.

Reference numbers and corresponding part names in the drawings:

1-rotating a mandrel; 11-section fork; 2-a universal joint; 21-a shaft body; 211-shaft rod; 212-a first groove; 213-a second groove; 22-shaft sleeve; 221-support plate; 222-oil can; 223-a ball; 224-sealing plug.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Examples

As shown in fig. 1-4, a rotary steering universal joint for well drilling, including the rotary mandrel 1, the activity of the front and back end junction of rotary mandrel 1 is provided with universal joint 2, including axis body 21 and multiunit axle sleeve 22 in the universal joint 2, on the axis body 21 is located to the equal movable sleeve of every group axle sleeve 22, and the utility model discloses in, the point contact between ball 223 and the second recess 213 has greatly reduced area of contact, and when ball 223 rotated along second recess 213, the oilcan 222 on top can be through in the lubricated second recess 213 of spin, further reduces the frictional force of ball 223, and extension board 221 and protruding structure can play the effect of fixed axle sleeve 22.

The specific implementation mode is as follows:

the utility model discloses in, through with traditional axle sleeve 22 and axostylus axostyle 211 direct contact, turn into the point contact between ball 223 and the second recess 213, very big reduction area of contact, and when ball 223 rotates along second recess 213, the oilcan 222 on top can be through in the lubricated second recess 213 of spin 223, further reduce ball 223's frictional force, the cross axle universal joint has been protected, avoided universal joint 2 under long-time service pressure, cause structural damage, and extension board 221 and protruding structure, can play fixed axle sleeve 22's effect, protruding structure card is established in first recess 212, and at the pivoted in-process, can rotate along the indenture of first recess 212, during the side atress, effect to fixing is not influenced, convenient the dismantlement.

Preferably, the shaft 211 is disposed outwards at four corners of the shaft 21, and the outer surface of each shaft 211 is sequentially provided with a first groove 212 and a second groove 213 from top to bottom; the shaft 211 has an effect of uniformly applying force, and the first groove 212 and the second groove 213 are conveniently fixed, thereby improving structural stability.

Preferably, the shaft sleeve 22 is a hollow cavity structure with one end having no surface, a support plate 221 is arranged towards the middle of the inner wall of the shaft sleeve 22, an oil pot 222 is arranged inwards on the outer edge of the shaft sleeve 22, a sealing plug 224 is arranged on the outer side of the oil pot 222, and a ball 223 is movably arranged at the bottom end of the oil pot 222; after the shaft sleeve 22 and the shaft body 21 are fixed, the lubricating liquid in the oil can 222 can lubricate the second groove 213 through the ball 223, so that the friction force between the grooves is reduced, and the service life of the universal joint 2 is prolonged.

Preferably, the bottom end of the ball 223 is disposed in the second groove 213, and the size of the shaft 211 is matched with the size of the outer edge of the sleeve 22; the second groove 213 is used to cooperate with the strip 221 and the protruding structure for fixing, so that the user can conveniently fix and disassemble the strip.

Preferably, the end of the strip 221 is provided with a protrusion structure inward, and the size of the first groove 212 is matched with the protrusion structure; the convenience of customers fixes, improves structural stability.

Preferably, the two sides of the rotating mandrel 1 are both provided with a joint fork 11, and the front end and the rear end of the rotating mandrel 1 are both fixedly connected with the universal joint 2 through the joint forks 11; the installation and fixation are convenient for users.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A rotary steerable drilling joint comprising a rotating mandrel (1), characterized in that: the universal joint (2) is movably arranged at the joint of the front end and the rear end of the rotating mandrel (1), the universal joint (2) comprises a shaft body (21) and a plurality of groups of shaft sleeves (22), and each group of shaft sleeves (22) are movably sleeved on the shaft body (21).

2. A rotary steerable drilling joint as in claim 1, wherein: the shaft body (21) is provided with shaft levers (211) outwards at four corners, and a first groove (212) and a second groove (213) are sequentially formed in the outer side surface of each group of the shaft levers (211) from top to bottom.

3. A rotary steerable drilling joint as in claim 2, wherein: the oil pot is characterized in that the shaft sleeve (22) is of a hollow cavity structure with one non-surface end, a support plate (221) is arranged towards the middle of the inner wall of the shaft sleeve (22), an oil pot (222) is arranged inwards on the outer side edge of the shaft sleeve (22), a sealing plug (224) is arranged on the outer side of the oil pot (222), and a ball (223) is movably arranged at the bottom end of the oil pot (222).

4. A rotary steerable drilling joint as in claim 3, wherein: the bottom ends of the balls (223) are arranged in the second groove (213), and the size of the shaft rod (211) is matched with the size of the outer edge of the shaft sleeve (22).

5. A rotary steerable drilling joint as in claim 4, wherein: the tail end of the support plate (221) is provided with a protruding structure inwards, and the size of the first groove (212) is matched with that of the protruding structure.

6. A rotary steerable drilling joint as in claim 1, wherein: the universal joint is characterized in that joint forks (11) are arranged on two sides of the rotating mandrel (1), and the front end and the rear end of the rotating mandrel (1) are fixedly connected with the universal joint (2) through the joint forks (11).