CN117231126B - Oil-gas well borehole track control device and method - Google Patents
Oil-gas well borehole track control device and method Download PDFInfo
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- CN117231126B CN117231126B CN202311234158.0A CN202311234158A CN117231126B CN 117231126 B CN117231126 B CN 117231126B CN 202311234158 A CN202311234158 A CN 202311234158A CN 117231126 B CN117231126 B CN 117231126B
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000005553 drilling Methods 0.000 claims abstract description 51
- 239000003921 oil Substances 0.000 claims abstract description 47
- 239000012530 fluid Substances 0.000 claims abstract description 29
- 239000010687 lubricating oil Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 230000008602 contraction Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
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Abstract
The invention discloses an oil and gas well borehole track control device and method, comprising an upper joint, an upper shell, a roller bearing, an eccentric cylinder, a mandrel, a disc valve, a lower shell, a radial push block, a screw, a limiting block, a spring, a sliding block and a sealing ring; the eccentric cylinder rotates under the action of gravity, drilling fluid enters the bypass annular cavity, high-pressure drilling fluid acts on the upper end surfaces of other sliding blocks except the sliding blocks connected with the short annular blind grooves, the sliding blocks compress the springs and lubricating oil in the sliding block cavity downwards, and the lubricating oil flows into the pushing block cavity and pushes the radial pushing blocks to extend outwards; the low-pressure drilling fluid in the annular space of the drill string and the well wall acts on the sliding block connected with the short annular blind groove, when the pressure of lubricating oil in the sliding block cavity is lower than the pressure of the low-pressure drilling fluid, the sliding block moves downwards to compress the spring, when the pressure of the lubricating oil in the sliding block cavity is higher than the pressure of the low-pressure drilling fluid, the sliding block moves upwards to recover the spring, and the radial pushing block at the low side is contracted. The device realizes the automatic extension and contraction of the radial pushing block to incline down through hydraulic pressure.
Description
Technical Field
The invention relates to an underground tool, in particular to an oil and gas well borehole trajectory control device and method, and belongs to the technical field of mechanical engineering or drilling engineering.
Background
The economic high-speed development makes the demand for oil and gas resources become larger and larger, traditional shallow oil and gas resources are gradually exhausted, and exploitation of oil and gas resources starts to develop towards deep and ultra-deep layers. Drilling is an important way for developing oil and gas resources, along with the increase of depth, drilling difficulty is larger, and especially under the environment conditions of easy-to-incline stratum such as high steep structure and large inclination angle, strong natural deflecting capability and uneven stratum hardness, the conventional drilling technology often generates the condition that a drill bit deviates from a vertical axis to generate well inclination, so that well inclination exceeds standard, and the condition can cause great operation risk and economic loss, and the drilling efficiency is reduced. It is not possible to want to control the absolute non-deviation of the vertical well bore, but the degree of deviation or curvature of the well bore can be controlled to a certain extent.
Vertical drilling tools are important equipment for correcting and lowering the inclination, and are used to drill wellbores deep in the subsurface during oil exploration and production to extract subsurface oil and gas resources. Related researches on automatic vertical drilling tools are carried out by units and institutions such as China's victory oil field, daqing drilling engineering institute, china's geological university and the like, but the research, the manufacture and the maintenance costs of many domestic automatic vertical drilling tools are relatively high, so that the application of the automatic vertical drilling tools is limited, the design and the operation of the automatic vertical drilling tools need highly specialized technical knowledge and experience, the technical complexity can cause the difficulty of operation and maintenance, the difficulty of technical deployment is increased, and the application range of the automatic vertical drilling tools is limited by geology and drilling conditions. The use of automated vertical drilling tools may be challenging, particularly under special geological conditions, such as complex formations, weak formations, or high temperature and high pressure environments. Thus, there is a need for an automatic vertical drilling tool that is low in cost, highly reliable, and highly adaptable.
Disclosure of Invention
The invention aims at: an oil and gas well borehole trajectory control device and method are provided for achieving reduced well inclination to control the borehole trajectory when the well inclination is too large.
The technical scheme adopted by the invention is as follows:
The utility model provides an oil and gas well borehole trajectory controlling means, includes top connection, last casing, roller bearing, eccentric barrel, dabber, disk valve, inferior valve, radial ejector pad, screw, stopper, spring, slider and sealing washer, its characterized in that, the upper end and the upper portion drilling string of top connection are connected, and the lower extreme and the upper end of last casing pass through threaded connection, the lower extreme and the inferior valve upper end of last casing pass through threaded connection, the dabber compresses tightly to set up between top connection and inferior valve, eccentric barrel passes through spline connection with the disk valve, and eccentric barrel and disk valve set up in the bypass annular chamber that top connection lower extreme, inferior valve upper end, upper casing inner wall and dabber outer wall formed, eccentric barrel suit is outside the dabber, be equipped with roller bearing between top connection and the eccentric barrel, radial ejector pad is installed on the inferior valve, the stopper passes through the screw to be fixed in down on the casing, the stopper is limited radial ejector pad drops from down the casing, be equipped with slider and spring between disk valve and inferior valve, and lower casing upper end and lower extreme of spring are acted on slider and inferior valve respectively, inferior valve and inferior valve are equipped with radial contact surface and the drilling string down between the slider and the face.
Further, the upper end of the oil-gas well borehole track control device is connected with the upper drill string through an upper joint, the lower end of the oil-gas well borehole track control device is connected with the lower drill string through a lower shell, and drilling fluid flowing from the ground to the underground passes through a through hole in the mandrel.
The upper shell is provided with a plurality of upper shell radial through holes which are uniformly distributed along the circumference.
Further, the upper housing radial through hole is used for communicating the lower housing radial through hole and the disk valve radial hole so that annulus low-pressure drilling fluid can act on the sliding block at the low side.
The eccentric cylinder comprises an eccentric block, an eccentric cylinder radial through hole, spline grooves and bearing steps, wherein the eccentric block is arranged outside the eccentric cylinder and is in a protruding state, the eccentric cylinder radial through hole is arranged on the opposite side of the eccentric block, the spline grooves are formed in the outer wall of the lower end of the eccentric cylinder, the spline grooves are distributed uniformly along the circumference, and the bearing steps are arranged at the upper end of the eccentric cylinder and are used for installing roller bearings.
Further, when the well hole is inclined, the eccentric block is always positioned at the low side of the well hole under the action of gravity, and a roller bearing is arranged between the eccentric cylinder and the upper joint so that the eccentric cylinder can freely rotate in the bypass annular cavity.
The mandrel is provided with a plurality of mandrel radial through holes which are uniformly distributed along the circumference; the radial through hole of the mandrel and the radial through hole of the eccentric cylinder are at the same height along the axial direction of the mandrel.
Further, the radial through hole of the eccentric cylinder can be aligned with or staggered from the radial through hole of the mandrel; two ends of the mandrel are respectively pressed by the inner step of the upper connector and the inner step of the lower shell.
The disc valve comprises a disc valve radial hole, a short ring blind groove, a long ring through groove and a spline, wherein the disc valve radial hole is communicated with the short ring blind groove, the disc valve radial hole and the upper shell radial through hole are at the same height along the axial direction of the upper shell, and the spline is embedded into the spline groove; after the eccentric cylinder is connected with the disc valve through a spline, the radial hole of the disc valve and the eccentric block are positioned on the same side of the circumference.
Further, the disk valve synchronously rotates along with the eccentric cylinder, the radial hole of the disk valve is communicated with the short ring blind groove, and the radial hole of the disk valve can be aligned with or staggered with the radial through hole of the upper shell; the disc valve is positioned on a step inside the lower housing.
The lower shell comprises a plurality of radial through holes, a push block cavity, lower shell limiting steps, screw blind holes, a slider cavity, lower spring blind holes and oil through holes, wherein the radial through holes of the lower shell are uniformly distributed along the circumference, the push block cavity is uniformly distributed along the circumference, the lower shell limiting steps are positioned at the upper end and the lower end of the push block cavity, the screw blind holes are formed in the lower shell limiting steps, the slider cavity is used for installing a slider, and each slider cavity is provided with lower spring blind holes for placing springs.
Further, a pushing block cavity in the lower shell is communicated with the sliding block cavity; the radial pushers are the same height as the pushers cavities.
The radial push block comprises a push block limiting step and a push block sealing groove, and the push block limiting step is used for preventing the radial push block from slipping from the push block cavity; the sliding block comprises a sliding block sealing groove and an upper spring blind hole, and a spring is arranged between the upper spring blind hole and the lower spring blind hole; sealing rings are arranged between the pushing block sealing groove and the sliding block sealing groove; lubricating oil is arranged in the pushing block cavity provided with the radial pushing block and the sliding block cavity provided with the sliding block, and the sliding block cavity and the lubricating oil in the pushing block cavity can be communicated through the oil through hole.
Further, the outer surface of the radial pushing block is arc-shaped, and the arc diameter of the outer surface of the radial pushing block is the same as the outer diameter of the lower shell.
The limiting block is provided with a screw through hole, and the screw penetrates through the screw through hole to fix the limiting block on the lower shell.
Further, the limiting block can prevent the radial pushing block from falling off when acting on the limiting step of the radial pushing block.
The number of the radial through holes of the upper shell, the radial through holes of the lower shell, the radial pushing blocks, the springs and the sliding blocks are the same; the upper shell radial through hole is always communicated with the lower shell radial through hole.
When the well section is large in well inclination and needs to be corrected, the well track control device is installed in the drill string, and drilling fluid flowing into the upper joint in the drilling process flows to the lower drill string through the lower shell through the inner hole of the mandrel; when the well body is inclined, the eccentric block of the eccentric cylinder is turned to the low side of the well hole under the action of gravity, the radial through hole of the eccentric cylinder is turned to the high side of the well hole, the disc valve and the eccentric cylinder synchronously rotate, the radial through hole of the mandrel is communicated with the radial through hole of the eccentric cylinder, and the radial through hole of the upper shell is communicated with the radial hole of the disc valve; the drilling fluid can enter the bypass annular cavity through the radial through hole of the mandrel and the radial through hole of the eccentric cylinder, the high-pressure drilling fluid flows through the long annular through groove and acts on the upper end surfaces of other sliding blocks except the sliding blocks connected with the short annular blind groove, the sliding blocks move downwards and compress lubricating oil in the spring and the sliding block cavity, the lubricating oil flows into the pushing block cavity through the oil through holes and pushes the radial pushing blocks to extend outwards, the overhanging radial pushing blocks act on the high side of the well wall, and meanwhile, the high side of the well wall exerts reactive force on a drill string connected with the radial pushing blocks; the upper shell radial through hole, the lower shell radial through hole, the disc valve radial hole and the short ring blind groove are communicated, a drill column and low-pressure drilling fluid in the well wall ring are acted on a sliding block connected with the short ring blind groove, when the pressure of lubricating oil in a sliding block cavity is lower than the pressure of the low-pressure drilling fluid, the sliding block moves downwards to compress a spring, when the pressure of the lubricating oil in the sliding block cavity is higher than the pressure of the low-pressure drilling fluid, the sliding block moves upwards to recover the spring, the lubricating oil in a pushing block cavity flows to the sliding block cavity through an oil hole, and the radial pushing block at the low side is contracted; during drilling, weight and torque transmitted by the upper drill string are transmitted to the lower drill string via the upper sub, upper housing and lower housing, respectively.
Compared with the prior art, the invention has the following beneficial effects: (1) The hydraulic oil control device is suitable for various complex geology, when the well bore is inclined, the eccentric weight of the eccentric cylinder is always at the low side of the well bore, and the high-pressure well fluid can control the lubricating oil pressure to realize the accurate control of the radial push block extension, thereby achieving the purpose of reducing the well inclination; (2) The eccentric cylinder of the device synchronously rotates with the disc valve, the short ring groove of the disc valve and the radial hole communicated with the short ring groove are communicated with the outside, when the eccentric block rotates, the short ring groove and the radial hole communicated with the short ring groove rotate, well fluid below the eccentric block is discharged outwards through the short ring groove and the radial hole communicated with the short ring groove, the spring and the lubricating oil pressure enable the sliding block to slide upwards, the shrinkage of the radial pushing block does not depend on the reaction force of a well wall, and the radial pushing block automatically shrinks by depending on the lubricating oil pressure, so that the friction with the well wall is reduced; (3) The invention does not contain electronic components and has high reliability for complex underground conditions such as high temperature, high pressure and the like.
Drawings
FIG. 1 is a schematic diagram of a well path control device for an oil and gas well according to the present invention;
FIG. 2 is a schematic view of section A-A of FIG. 1;
FIG. 3 is a schematic view of section B-B of FIG. 1;
FIG. 4 is a schematic view of section C-C of FIG. 1;
FIG. 5 is a schematic illustration of the structure of an eccentric cartridge in an oil and gas well borehole trajectory control device according to the present invention;
FIG. 6 is a schematic illustration of another configuration of an eccentric cartridge in an oil and gas well borehole trajectory control device according to the present invention;
FIG. 7 is a schematic diagram of a mandrel in an oil and gas well borehole trajectory control device according to the present invention;
FIG. 8 is a schematic diagram of a disc valve in an oil and gas well borehole trajectory control device according to the present invention;
FIG. 9 is a schematic illustration of another configuration of a disc valve in an oil and gas well borehole trajectory control device according to the present invention;
FIG. 10 is a schematic illustration of another configuration of a disc valve in an oil and gas well borehole trajectory control device according to the present invention;
FIG. 11 is a schematic diagram of the configuration of the eccentric cylinder and disc valve combination in an oil and gas well borehole trajectory control device according to the present invention;
FIG. 12 is a schematic view of an eccentric cylinder and disc valve combination in an oil and gas well trajectory control device according to another embodiment of the present invention
FIG. 13 is a schematic view of the structure of a lower housing in an oil and gas well borehole trajectory control device according to the present invention;
FIG. 14 is another schematic view of the lower housing of the oil and gas well borehole trajectory control device of the present invention;
FIG. 15 is a full cross-sectional view of a lower housing in an oil and gas well wellbore trajectory control device of the present invention;
FIG. 16 is another schematic view of the lower housing of the oil and gas well borehole trajectory control device of the present invention;
FIG. 17 is another schematic view of the lower housing of the oil and gas well borehole trajectory control device of the present invention;
FIG. 18 is a schematic view of a slider in an oil and gas well borehole trajectory control device according to the present invention;
FIG. 19 is a schematic view of a radial pusher block in an oil and gas well borehole trajectory control device according to the present invention;
FIG. 20 is a schematic diagram of a stopper in an oil and gas well borehole trajectory control device according to the present invention;
FIG. 21 is an enlarged view of a spring in an oil and gas well borehole trajectory control device of the present invention;
FIG. 22 is an enlarged view of a portion of a stopper in the device for controlling the trajectory of an oil and gas well in accordance with the present invention in cooperation with a screw;
In the figure: the device comprises a 1-upper joint, a 2-upper shell, a2 a-upper shell radial through hole, a 3-roller bearing, a 4-eccentric cylinder, a4 a-eccentric block, a4 b-eccentric cylinder radial through hole, a4 c-spline groove, a4 d-bearing step, a 5-mandrel, a 5 a-mandrel radial through hole, a 6-disc valve, a 6 a-disc valve radial hole, a 6 b-short ring blind groove, a 6 c-long ring through groove, a 6 d-spline, a 7-lower shell, a 7 a-lower shell radial through hole, a 7 b-push block cavity, a 7 c-lower shell limit step, a 7d screw blind hole, a 7 e-slide block cavity, a 7 f-lower spring blind hole, a 7 g-oil through hole, an 8-radial push block, an 8 a-push block limit step, an 8 b-push block seal groove, a 9-screw, a 10-limit block, a 10 a-screw through hole, an 11-spring, a 12-slide block, a 12 a-slide block seal groove, a 12 b-upper spring blind hole, a 13-seal ring, a 14-bypass ring cavity.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Examples:
As shown in fig. 1 and fig. 5 to fig. 22, the oil and gas well borehole trajectory control device comprises an upper joint 1, an upper shell 2, a roller bearing 3, an eccentric cylinder 4, a mandrel 5, a disc valve 6, a lower shell 7, a radial push block 8, a screw 9, a limiting block 10, a spring 11, a sliding block 12 and a sealing ring 13, and is characterized in that the upper end of the upper joint 1 is connected with an upper drill stem, the lower end of the upper joint 1 is connected with the upper end of the upper shell 2 through threads, the lower end of the upper shell 2 is connected with the upper end of the lower shell 7 through threads, the mandrel 5 is tightly pressed between the upper joint 1 and the lower shell 7, the eccentric cylinder 4 is connected with the disc valve 6 through a spline, the eccentric cylinder 4 and the disc valve 6 are arranged in a bypass annular cavity 14 formed by the lower end of the upper joint 1, the upper end of the lower shell 7, the inner wall of the upper shell 2 and the outer wall of the mandrel 5, the eccentric cylinder 4 is sleeved outside the mandrel 5, the roller bearing 3 is arranged between the upper joint 1 and the eccentric cylinder 4, the radial push block 8 is arranged on the lower shell 7, the limiting block 10 is fixed on the upper end of the upper shell 7 through the screw 9, the limiting block 10 is fixed on the lower shell 7, the lower shell 7 is contacted with the lower shell 7 and the sliding block 7 and the upper end of the sliding block 7 through the outer wall of the mandrel 5, and the sliding block 12 is arranged between the sliding block 12 and the upper end and the upper shell 7 and the sliding block 7, and the sliding block 12 is contacted with the upper end of the sliding block 7 and the upper shell 7, and the sliding block 12 through the sliding block 12.
The upper end of the oil-gas well borehole track control device is connected with an upper drill string through an upper connector 1, the lower end of the oil-gas well borehole track control device is connected with a lower drill string through a lower shell 7, and drilling fluid flowing downwards from the ground passes through an inner through hole of a mandrel 5.
As shown in fig. 1 to 3, the upper housing 2 is provided with a plurality of upper housing radial through holes 2a, and the upper housing radial through holes 2a are uniformly distributed along the circumference.
The upper housing radial through hole 2a is used for communicating the lower housing radial through hole 7a and the disk valve radial hole 6a so that annulus low-pressure drilling fluid can act on the sliding blocks at the lower part of the side.
As shown in fig. 5 and 6, the eccentric cylinder 4 includes an eccentric block 4a, an eccentric cylinder radial through hole 4b, spline grooves 4c and bearing steps 4d, the eccentric block 4a is disposed outside the eccentric cylinder 4 and is in a convex state, the eccentric cylinder radial through hole 4b is disposed at the opposite side of the eccentric block 4a, the spline grooves 4c are disposed at the outer wall of the lower end of the eccentric cylinder 4, the spline grooves 4c are plural and uniformly distributed along the circumference, and the bearing steps 4d are disposed at the upper end of the eccentric cylinder 4 for mounting the roller bearing 3.
When the well bore is inclined, the eccentric block 4a is always positioned at the low side of the well bore under the action of gravity, and the roller bearing 3 is arranged between the eccentric cylinder 4 and the upper joint 1, so that the eccentric cylinder 4 can freely rotate in the bypass annular cavity 14.
As shown in fig. 7, the mandrel 5 is provided with a plurality of mandrel radial through holes 5a, and the mandrel radial through holes 5a are uniformly distributed along the circumference; the radial through hole 5a of the mandrel and the radial through hole 4b of the eccentric cylinder are at the same height along the axial direction of the mandrel 5.
The eccentric cylinder radial through hole 4b can be aligned with or staggered from the mandrel radial through hole 5 a; two ends of the mandrel 5 are respectively pressed by the inner steps of the upper connector and the inner steps of the lower shell.
As shown in fig. 8 to 12, the disc valve 6 includes a disc valve radial hole 6a, a short ring blind groove 6b, a long ring through groove 6c, and a spline 6d, the disc valve radial hole 6a communicates with the short ring blind groove 6b, the disc valve radial hole 6a and the upper housing radial through hole 2a are at the same height along the axial direction of the upper housing 2, and the spline 6d is embedded in the spline groove 4 c; after the eccentric cylinder 4 and the disk valve 6 are connected through the spline 6d, the radial hole 6a of the disk valve and the eccentric block 4a are positioned on the same side of the circumference.
The disc valve 6 synchronously rotates along with the eccentric cylinder 4, the disc valve radial hole 6a and the short ring blind groove 6b are kept in a communicated state, and the disc valve radial hole 6a can be aligned with or staggered from the upper shell radial through hole 2 a; the disc valve 6 is located on a step inside the lower housing.
As shown in fig. 13 to 17, the lower housing 7 includes a plurality of radial through holes 7a of the lower housing, a plurality of push block cavities 7b, a lower housing limit step 7c, screw blind holes 7d, a slider cavity 7e, lower spring blind holes 7f and oil through holes 7g, the radial through holes 7a of the lower housing are uniformly distributed along the circumference, the push block cavities 7b are uniformly distributed along the circumference, the lower housing limit step 7c is located at the upper end and the lower end of the push block cavity 7b, the screw blind holes 7d are arranged on the lower housing limit step 7c, the slider cavities 7e are used for installing sliders 12, and each slider cavity 7e is provided with a lower spring blind hole 7f for placing springs 11.
The pushing block cavity 7b in the lower shell 7 is communicated with the sliding block cavity 7 e; the radial pushers 8 are the same height as the pushers cavities 7 b.
As shown in fig. 4, 18 and 19, the radial push block 8 includes a push block limiting step 8a and a push block sealing groove 8b, where the push block limiting step 8a is used to prevent the radial push block 8 from sliding off the push block cavity 7 b; the sliding block 12 comprises a sliding block sealing groove 12a and an upper spring blind hole 12b, and a spring 11 is arranged between the upper spring blind hole 12b and a lower spring blind hole 7 f; a sealing ring 13 is arranged between the pushing block sealing groove 8b and the sliding block sealing groove 12 a; lubricating oil is arranged in the push block cavity 7b provided with the radial push block 8 and the slide block cavity 7e provided with the slide block 12, and the lubricating oil in the slide block cavity 7e and the push block cavity 7b can be communicated through the oil through hole 7 g.
The outer surface of the radial pushing block 8 is arc-shaped, and the arc diameter of the outer surface of the radial pushing block 8 is the same as the outer diameter of the lower shell 7.
As shown in fig. 20 and 22, the stopper 10 is provided with a screw through hole 10a, and the screw 9 passes through the screw through hole 10a to fix the stopper 10 to the lower case 7.
The limiting block 10 can prevent the radial pushing block 8 from falling off when acting on the limiting step 8a of the radial pushing block 8.
As shown in fig. 1, the number of the upper shell radial through holes 2a, the number of the lower shell radial through holes 7a, the number of the radial pushing blocks 8, the number of the springs 11 and the number of the sliding blocks 12 are all the same; the upper housing radial through hole 2a and the lower housing radial through hole 7a are always communicated.
When the well section is greatly deviated and the deviation is required, the well track control device is installed in the drill string, and the drilling fluid flowing into the upper joint 1 during the drilling process flows to the lower drill string through the lower shell 7 through the inner hole of the mandrel 5 as shown in fig. 1 to 22; when the well bore is inclined, the eccentric block 4a of the eccentric cylinder 4 turns to the low side of the well bore and the eccentric cylinder radial through hole 4b turns to the high side of the well bore under the action of gravity, the disc valve 6 and the eccentric cylinder 4 synchronously rotate, the mandrel radial through hole 5a is communicated with the eccentric cylinder radial through hole 4b, and the upper shell radial through hole 2a is communicated with the disc valve radial through hole 6 a; drilling fluid can enter the bypass annular cavity 14 through the radial through hole 5a of the mandrel and the radial through hole 4b of the eccentric cylinder, high-pressure drilling fluid flows through the long annular through groove 6c and acts on the upper end surfaces of other sliding blocks 12 except the sliding blocks 12 connected with the short annular blind groove 6b, the sliding blocks 12 move downwards and compress lubricating oil in the springs 11 and the sliding block cavity 7e, the lubricating oil flows into the sliding block cavity 7b through the oil through holes 7g and pushes the radial sliding block 8 to extend outwards, the overhanging radial sliding block 8 acts on the high side of a well wall, and meanwhile, the high side of the well wall applies reactive force to a drill string connected with the radial sliding block 8; the upper shell radial through hole 2a, the lower shell radial through hole 7a, the disk valve radial hole 6a and the short ring blind groove 6b are communicated, a drill column and low-pressure drilling fluid in a well wall ring act on a sliding block 12 connected with the short ring blind groove 6b, when the pressure of lubricating oil in a sliding block cavity 7e is lower than the pressure of the low-pressure drilling fluid, the sliding block 12 moves downwards and compresses a spring 11, when the pressure of the lubricating oil in the sliding block cavity 7e is higher than the pressure of the low-pressure drilling fluid, the sliding block 12 moves upwards and enables the spring 11 to recover, the lubricating oil in a sliding block cavity 7b flows to the sliding block cavity 7e through an oil through hole 7g, and a radial sliding block 8 at the low side is contracted; during drilling, the weight and torque transmitted by the upper drill string are transmitted to the lower drill string via the upper sub 1, the upper housing 2 and the lower housing 7, respectively.
The above-described embodiments are intended to illustrate the present invention and not to limit the scope of the invention, and any equivalent changes and modifications made by those skilled in the art will be within the scope of the present system without departing from the spirit and principles of the present invention.
Claims (3)
1. The utility model provides an oil and gas well borehole trajectory controlling means, includes upper joint (1), upper housing (2), roller bearing (3), eccentric cylinder (4), dabber (5), disk valve (6), lower housing (7), radial ejector pad (8), screw (9), stopper (10), spring (11), slider (12) and sealing washer (13), its characterized in that, upper end and upper portion drilling string that upper joint (1) are connected, the lower extreme of upper joint (1) passes through threaded connection with the upper end of upper housing (2), the lower extreme and the lower housing (7) upper end of upper housing (2) pass through threaded connection, dabber (5) compress tightly and set up in between upper joint (1) and lower housing (7), eccentric cylinder (4) pass through spline connection with disk valve (6), eccentric cylinder (4) and disk valve (6) set up in upper end, lower housing (7) upper end, in bypass ring cavity (14) that upper housing (2) inner wall and dabber (5) outer wall formed, eccentric cylinder (4) suit in dabber (5) pass through threaded connection, eccentric cylinder (4) are equipped with in radial ejector pad (8) between upper housing (7), the limiting block (10) is fixed on the lower shell (7) through a screw (9), the limiting block (10) limits the radial pushing block (8) to fall off from the lower shell (7), a sliding block (12) and a spring (11) are arranged between the disc valve (6) and the lower shell (7), the upper end and the lower end of the spring (11) respectively act on the sliding block (12) and the lower shell (7), the lower end of the lower shell (7) is connected with a lower drill string, and sealing rings (13) are arranged between the contact surface of the sliding block (12) and the lower shell (7) and between the radial pushing block (8) and the contact surface of the lower shell (7); the upper shell (2) is provided with a plurality of upper shell radial through holes (2 a), and the upper shell radial through holes (2 a) are uniformly distributed along the circumference; the eccentric cylinder (4) comprises an eccentric block (4 a), an eccentric cylinder radial through hole (4 b), spline grooves (4 c) and bearing steps (4 d), wherein the eccentric block (4 a) is arranged outside the eccentric cylinder (4) and is in a protruding state, the eccentric cylinder radial through hole (4 b) is arranged on the opposite side of the eccentric block (4 a), the spline grooves (4 c) are formed in the outer wall of the lower end of the eccentric cylinder (4), the spline grooves (4 c) are multiple and are uniformly distributed along the circumference, and the bearing steps (4 d) are formed in the upper end of the eccentric cylinder (4) and are used for installing a roller bearing (3); the mandrel (5) is provided with a plurality of mandrel radial through holes (5 a), and the mandrel radial through holes (5 a) are uniformly distributed along the circumference; the radial through hole (5 a) of the mandrel and the radial through hole (4 b) of the eccentric cylinder are at the same height along the axial direction of the mandrel (5); the disc valve (6) comprises a disc valve radial hole (6 a), a short ring blind groove (6 b), a long ring through groove (6 c) and a spline (6 d), wherein the disc valve radial hole (6 a) is communicated with the short ring blind groove (6 b), the disc valve radial hole (6 a) and the upper shell radial through hole (2 a) are at the same height along the axial direction of the upper shell (2), and the spline (6 d) is embedded into the spline groove (4 c); after the eccentric cylinder (4) is connected with the disc valve (6) through a spline (6 d), the radial hole (6 a) of the disc valve and the eccentric block (4 a) are positioned on the same side of the circumference; the lower shell (7) comprises a plurality of lower shell radial through holes (7 a), a plurality of push block cavities (7 b), lower shell limiting steps (7 c), screw blind holes (7 d), a slider cavity (7 e), lower spring blind holes (7 f) and oil through holes (7 g), wherein the plurality of lower shell radial through holes (7 a) are uniformly distributed along the circumference, the plurality of push block cavities (7 b) are uniformly distributed along the circumference, the lower shell limiting steps (7 c) are positioned at the upper end and the lower end of the push block cavity (7 b), the screw blind holes (7 d) are formed in the lower shell limiting steps (7 c), the slider cavity (7 e) is used for installing a slider (12), and each slider cavity (7 e) is provided with a lower spring blind hole (7 f) for placing a spring (11); the radial push block (8) comprises a push block limiting step (8 a) and a push block sealing groove (8 b), and the push block limiting step (8 a) is used for preventing the radial push block (8) from slipping from the push block cavity (7 b); the sliding block (12) comprises a sliding block sealing groove (12 a) and an upper spring blind hole (12 b), and a spring (11) is arranged between the upper spring blind hole (12 b) and the lower spring blind hole (7 f); a sealing ring (13) is arranged between the pushing block sealing groove (8 b) and the sliding block sealing groove (12 a); lubricating oil is arranged in a pushing block cavity (7 b) provided with a radial pushing block (8) and a sliding block cavity (7 e) provided with a sliding block (12), and the lubricating oil in the sliding block cavity (7 e) and the pushing block cavity (7 b) can be communicated through an oil through hole (7 g); the limiting block (10) is provided with a screw through hole (10 a), and the screw (9) penetrates through the screw through hole (10 a) to fix the limiting block (10) on the lower shell (7).
2. The oil and gas well borehole trajectory control device according to claim 1, wherein the number of the upper shell radial through holes (2 a), the lower shell radial through holes (7 a), the radial push blocks (8), the springs (11) and the sliding blocks (12) is the same; the upper shell radial through hole (2 a) and the lower shell radial through hole (7 a) are always communicated.
3. A method of an oil and gas well borehole trajectory control device according to claim 1, characterized in that when the drilled well section is deviated and needs to be corrected, the borehole trajectory control device is installed in the drill string, and during drilling the drilling fluid flowing into the upper joint (1) flows through the inner bore of the mandrel (5) and through the lower housing (7) to the lower drill string; when the well bore is inclined, the eccentric block (4 a) of the eccentric cylinder (4) is turned to the lower side of the well bore under the action of gravity, the radial through hole (4 b) of the eccentric cylinder is turned to the upper side of the well bore, the disc valve (6) and the eccentric cylinder (4) synchronously rotate, the radial through hole (5 a) of the mandrel is communicated with the radial through hole (4 b) of the eccentric cylinder, and the radial through hole (2 a) of the upper shell is communicated with the radial hole (6 a) of the disc valve; drilling fluid can enter the bypass annular cavity (14) through the radial through hole (5 a) of the mandrel and the radial through hole (4 b) of the eccentric cylinder, high-pressure drilling fluid flows through the long annular through groove (6 c) and acts on the upper end faces of other sliding blocks (12) except the sliding blocks (12) connected with the short annular blind groove (6 b), the sliding blocks (12) move downwards and compress lubricating oil in the springs (11) and the sliding block cavity (7 e), the lubricating oil flows into the sliding block cavity (7 b) through the oil through holes (7 g) and pushes the radial sliding blocks (8) to extend outwards, the overhanging radial sliding blocks (8) act on the high side of a well wall, and meanwhile the high side of the well wall exerts reactive force on a drill string connected with the radial sliding blocks (8); the upper shell radial through hole (2 a), the lower shell radial through hole (7 a), the disk valve radial hole (6 a) and the short ring blind groove (6 b) are communicated, a drill column and low-pressure drilling fluid in a well wall ring act on a sliding block (12) connected with the short ring blind groove (6 b), when the pressure of lubricating oil in a sliding block cavity (7 e) is lower than the pressure of the low-pressure drilling fluid, the sliding block (12) moves downwards and compresses a spring (11), when the pressure of the lubricating oil in the sliding block cavity (7 e) is higher than the pressure of the low-pressure drilling fluid, the sliding block (12) moves upwards and enables the spring (11) to recover, the lubricating oil in the sliding block cavity (7 b) flows to the sliding block cavity (7 e) through an oil through hole (7 g), and the radial sliding block (8) at the low side is contracted; during drilling, the weight and torque transmitted by the upper drill string are transmitted to the lower drill string through the upper connector (1), the upper shell (2) and the lower shell (7) respectively.
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| CN202311234158.0A CN117231126B (en) | 2023-09-24 | 2023-09-24 | Oil-gas well borehole track control device and method |
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| CN202311234158.0A CN117231126B (en) | 2023-09-24 | 2023-09-24 | Oil-gas well borehole track control device and method |
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| CN117231126B true CN117231126B (en) | 2024-04-30 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067510A (en) * | 2019-05-28 | 2019-07-30 | 西南石油大学 | A kind of pushing type rotary steering drilling tool |
| CN114876368A (en) * | 2022-05-13 | 2022-08-09 | 中石化江钻石油机械有限公司 | Automatic correcting and direction-controlling vertical drilling tool |
| CN217327184U (en) * | 2022-05-13 | 2022-08-30 | 中石化江钻石油机械有限公司 | Automatic correcting and direction-controlling vertical drilling tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112360349B (en) * | 2020-12-10 | 2022-01-04 | 西南石油大学 | Mechanical automatic vertical drilling tool |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067510A (en) * | 2019-05-28 | 2019-07-30 | 西南石油大学 | A kind of pushing type rotary steering drilling tool |
| CN114876368A (en) * | 2022-05-13 | 2022-08-09 | 中石化江钻石油机械有限公司 | Automatic correcting and direction-controlling vertical drilling tool |
| CN217327184U (en) * | 2022-05-13 | 2022-08-30 | 中石化江钻石油机械有限公司 | Automatic correcting and direction-controlling vertical drilling tool |
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