CN204402386U

CN204402386U - The constant device of torque-on-bit

Info

Publication number: CN204402386U
Application number: CN201420848139.7U
Authority: CN
Inventors: 蔡文军; 张辉; 吴仲华; 聂云飞; 左灵
Original assignee: Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Current assignee: Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Priority date: 2014-12-29
Filing date: 2014-12-29
Publication date: 2015-06-17
Anticipated expiration: 2024-12-29

Abstract

The utility model discloses the constant device of a kind of torque-on-bit for oil and gas well drilling, and it is made up of upper shell, circumferential sliding bearing, black box, self-aligning bearing, helical torsion spring, lower shell.Upper shell and lower shell two parts are set with between two parties, there is relative moving axially and circumference rotation; The bottom of upper shell has oblique hole, and the top of lower shell has oblique hole, and helical torsion spring is assemblied in oblique hole, and upper shell is connected by a series of helical torsion spring with lower shell two parts; Self-aligning bearing, black box and circumferential sliding bearing is equipped with between upper and lower cylindrical shell.The constant device of torque-on-bit makes bit conversion of motion be to well head direction rectilinear motion when exceeding and presetting moment of torsion, the impact energy that in reduction the pressure of the drill, elimination reduction drilling process, drill bit produces reaches classes of failures and maintenance bit operation moment of torsion is constant.Structure of the present utility model is simple, reliable, and execute-in-place is convenient.

Description

The constant device of torque-on-bit

Technical field

The utility model relates to the constant device of a kind of torque-on-bit for oil and gas well drilling, belongs to drilling well downhole tool field.

Background technology

In some new exploratory areas, oil-gas reservoir is buried deeply, and stratum is hard, and abrasiveness is strong, and rate of penetration is low, and drilling speed is the technical barrier that scene faces always.Cause in drilling process the low principal element of rate of penetration for bore meet soft or hard interlock stratum time, the sliding phenomenon of easy generation card, cause frequently suppressing of drill bit and drilling tool jump and turn round shake, cause drill bit to collapse the damage of disconnected de-, the downhole well tool of tooth, damage, drilling tool (rotary steering system, hang down drill system) and measurement while-drilling instrument.In current domestic brill, workover treatment process, still can not reduce drill bit frequently brake in drilling process, keep drill bit job stability, prevent drill bit from damaging in advance, cannot eliminate due to creep into soft or hard interlock the infringement to down-hole electronic measuring instrument, drill string thread that drill string torque fluctuation that laminar formation causes, braking and stall and reducing brings thus, prevent underground equipment to lose efficacy.Retrieval " the constant device of torque-on-bit " keyword, exists without qualified publication.

Summary of the invention

The purpose of this utility model is for prior art Problems existing, provides a kind of and torque-on-bit in drilling operation course can be kept to be no more than preset maximum value and have the constant device of torque-on-bit of dynamic vibration-damping function.

The technical solution of the utility model is:

The constant device of a kind of torque-on-bit, primarily of upper shell, helical torsion spring, lower shell composition; Wherein: upper shell and lower shell two parts are set with between two parties, and upper shell is connected by helical torsion spring with lower shell two parts; The bottom of upper shell has oblique hole, and the top of lower shell has oblique hole, and helical torsion spring is assemblied in oblique hole.

Such scheme also comprises:

Circumferential sliding bearing and self-aligning bearing is also had between upper shell and lower shell.Black box is also had between upper shell and lower shell, and between self-aligning bearing righting and circumferential sliding bearing.The end of upper shell and lower shell is respectively equipped with internal and external screw thread joint.

Operating principle of the present utility model is: during drillng operation, the constant device of torque-on-bit is connected to drilling tool bottom important in well drilling pipe column, such as in by MTR slipping drilling process or turntable rotation creep in when applying, be placed in the bottom of DATA REASONING unit, transmission unit and important overall precision instrument.Its course of work creeps into what cause drill bit bit bouncing the axial shrinkage that torque axis turns to BHA by what increase, and the pressure of the drill of drill bit is reduced at once, and the quick reduction of the pressure of the drill causes the minimizing of Cutter wedging depth of stratum, thus maintain drill bit and continue to rotate.Moment of torsion is transformed axial shrinkage motion and is realized by some row helical torsion springs, convert rotational motion is that the excess energy of rectilinear motion (when exceeding setting moment of torsion) is by high strength helical torsion spring compression storage simultaneously, when bit operation moment of torsion is lower than setting moment of torsion, the energy that helical torsion spring absorbs can feed back to drill bit, when moment of torsion diminishes, pressure is applied to drill bit, thus the torsional load that maintenance one is constant, this can absorption can realize continuously working with the system released energy, thus the impact energy eliminating drill bit generation in reduction drilling process reaches classes of failures and keeps bit operation moment of torsion constant.

The constant device of torque-on-bit of the present utility model is mainly used to transmit the destructive energy owing to producing during well drilling and rock crushing, it can will exceed the expectation moment of torsion that presets by convert rotational motion for move along borehole axis, torque-on-bit in drilling operation course is kept to be no more than preset maximum value and to have the instrument of dynamic vibration-damping function, well solve drill bit in drilling process, frequently the suppressing of drill bit and drilling tool is jumped and is turned round shake and cause frequent storages of energy in drilling tool to discharge, uncontrolled fault offset causes the stress of drilling tool and drill bit to be concentrated, especially the precision instrument that a large amount of use machine liquid is electrical integrated in current drilling engineering, drill bit is caused to collapse tooth, damage, drilling tool is disconnected de-, downhole well tool (rotary steering system, hang down drill system) and the damage of measurement while-drilling instrument, because the big ups and downs of moment of torsion cause the drilling tool of upper km to produce the problems such as nuisance vibration in drilling operation course.

Comprehensively above-mentioned, outstanding advantages of the present utility model is: prevent the sliding impact energy produced of drill chuck in drilling engineering from reaching classes of failures and optimizing Rock Cutting efficiency, structure is simple, reliable, and execute-in-place is convenient.

Accompanying drawing explanation

Fig. 1 is the constant device structure chart of a kind of torque-on-bit for oil and gas well drilling;

In figure: 1 upper shell, 2 predetermined torques, 3 circumferential sliding bearings, 4 black boies, 5 self-aligning bearings, 6 helical torsion springs, 7 centre bores, 8 lower shells.

Detailed description of the invention

Below in conjunction with Figure of description, the utility model is further described.

See Fig. 1, the constant device of torque-on-bit is made up of upper shell 1, circumferential sliding bearing 3, black box 4, self-aligning bearing 5, helical torsion spring 6, lower shell 8.

Wherein, lower shell 8 bottom has standard A PI drill rod thread button, is connected with lower drilling tool by it; Upper shell 1 top has standard A PI drill rod thread button, upper and lower cylindrical shell 1,8 connect and between be equipped with self-aligning bearing 5 and circumferential sliding bearing 3, self-aligning bearing 5 righting upper shell 1 makes it placed in the middle, and circumferential sliding bearing 3 pairs of upper shells 1 carry out axial limiting; A series of helical torsion spring 6 is equipped with between upper shell 1 and lower shell 8, helical torsion spring 6 plays the effect of guiding mechanism, helical torsion spring 6 carries out spacing to upper and lower cylindrical shell 1,8 circumference and axially-movable and transforms, and is carried out the size controlling to adjust predetermined torque value by the material to a series of helical torsion spring 6, thickness, helix parameter and quantity; Upper and lower cylindrical shell 1,8 is provided with centre bore 7 overcurrent mud, and it is radial that black box 4 is assemblied in upper and lower cylindrical shell 1,8, between self-aligning bearing 5 righting and circumferential sliding bearing 3, ensures the sealing between upper and lower cylindrical shell 1,8 inside center hole 7 and bore hole annulus.

When shaft bottom bit load moment of torsion exceeds predetermined torque 2, realize circumference to be converted into axial linear movement by helical torsion spring 6; When moment of torsion becomes large, exceed preset torque 2 and be worth, cause upper and lower cylindrical shell 1,8 circumference and axially-movable, rotating along first direction makes helical torsion spring 6 compress, and lower shell 8 upwards moves in well head direction, and the pressure of the drill diminishes, torsional pulse Conversion of Energy, carries out stored energy by helical torsion spring 6 compression; When shaft bottom, torque-on-bit diminishes, and causes upper and lower cylindrical shell 1,8 circumference and axially-movable, and rotate along second direction and helical torsion spring 6 is extended, lower shell 8 moves in direction, shaft bottom downwards, is extended carry out fault offset by helical torsion spring 6.

During drillng operation, the constant device of torque-on-bit is connected to drilling tool bottom important in well drilling pipe column, such as in by MTR slipping drilling process or turntable rotation creep in when applying, be placed in the bottom of DATA REASONING unit, transmission unit and important overall precision instrument.Its course of work creeps into what cause drill bit bit bouncing the axial shrinkage that torque axis turns to BHA by what increase, and the pressure of the drill of drill bit is reduced at once, and the quick reduction of the pressure of the drill causes the minimizing of Cutter wedging depth of stratum, thus maintain drill bit and continue to rotate.Moment of torsion is transformed axial shrinkage motion and is realized by some row helical torsion springs 6, simultaneously convert rotational motion is that the excess energy of rectilinear motion (when exceeding setting moment of torsion) compresses storage by high strength helical torsion spring 6, when bit operation moment of torsion is lower than setting moment of torsion, the energy that helical torsion spring 6 absorbs can feed back to drill bit, when moment of torsion diminishes, pressure is applied to drill bit, thus the torsional load that maintenance one is constant, this can absorption can realize continuously working with the system released energy, thus the impact energy eliminating drill bit generation in reduction drilling process reaches classes of failures and keeps bit operation moment of torsion constant.

Claims

1. the constant device of torque-on-bit, primarily of upper shell (1), helical torsion spring (6), lower shell (8) composition; It is characterized in that: upper shell (1) and lower shell (8) two parts are set with between two parties, upper shell (1) is connected by helical torsion spring (6) with lower shell (8) two parts; The bottom of upper shell (1) has oblique hole, and the top of lower shell (8) has oblique hole, and helical torsion spring (6) is assemblied in oblique hole.

2. the constant device of torque-on-bit according to claim 1, is characterized in that: also have circumferential sliding bearing (3) and self-aligning bearing (5) between upper shell (1) and lower shell (8).

3. the constant device of torque-on-bit according to claim 2, it is characterized in that: between upper shell (1) and lower shell (8), also have black box (4), black box (4) is assemblied on the contact surface between upper shell (1) and lower shell (8), is positioned between self-aligning bearing (5) righting and circumferential sliding bearing (3).

4. the constant device of torque-on-bit according to claim 2, is characterized in that: the end of upper shell (1) and lower shell (8) is respectively equipped with internal and external screw thread joint.