CN201043441Y - A variable diameter azimuth stabilizer - Google Patents

Abstract

Translated fromChinese

本实用新型涉及石油钻井设备技术领域，具体涉及一种用于防止定向钻井方位漂移的变径方位稳定器。本实用新型为克服现有技术存在的会造成钻具或井眼轨迹发生方位漂移的问题，采用的技术方案是：一种变径方位稳定器，包括旋转轴和变径总成，旋转轴上设置有导压孔，所述变径总成包括导向装置和筒状的不旋转套，所述不旋转套可旋转地嵌设于旋转轴的外壁上，不旋转套的外壁上沿圆周均布有数个条状导向槽，所述导向装置设置于导向槽内；所述导向装置由径向设置的导向套和定位件构成，导压孔与导向套连通，定位件可滑动地设置于导向套内，导向装置与不旋转套上导向槽间设置有复位机构和限位机构。本实用新型保留了原有变径稳定器的优点，同时具备稳定方位的新功能。

The utility model relates to the technical field of oil drilling equipment, in particular to a variable-diameter azimuth stabilizer for preventing directional drilling azimuth drift. In order to overcome the problem of azimuth drift of the drilling tool or wellbore track in the prior art, the utility model adopts the following technical solution: a variable-diameter azimuth stabilizer, which includes a rotating shaft and a variable-diameter assembly, and the rotating shaft A pressure guide hole is provided, and the variable diameter assembly includes a guide device and a cylindrical non-rotating sleeve. The non-rotating sleeve is rotatably embedded on the outer wall of the rotating shaft, and the outer wall of the non-rotating sleeve is evenly distributed along the circumference. There are several strip-shaped guide grooves, and the guide device is arranged in the guide groove; the guide device is composed of a radially arranged guide sleeve and a positioning piece, the pressure guiding hole is connected with the guide sleeve, and the positioning piece is slidably arranged on the guide sleeve Inside, a reset mechanism and a limit mechanism are arranged between the guide device and the upper guide groove of the non-rotating sleeve. The utility model retains the advantages of the original variable-diameter stabilizer, and at the same time has the new function of stabilizing the orientation.

Description

Translated fromChinese

一种变径方位稳定器A variable diameter azimuth stabilizer

所属技术领域：Technical field:

本实用新型涉及石油钻井设备技术领域，具体涉及一种用于防止定向钻井方位漂移的变径方位稳定器。The utility model relates to the technical field of oil drilling equipment, in particular to a variable-diameter azimuth stabilizer for preventing directional drilling azimuth drift.

背景技术：Background technique:

变径方位稳定器是一种用于防止定向钻井方位漂移的变径稳定器。The variable-diameter azimuth stabilizer is a variable-diameter stabilizer used to prevent azimuth drift in directional drilling.

传统的稳定器分外径固定和外径可控两大类。钻井中大量使用的是外径固定的稳定器。靠近钻头的称近钻头稳定器，远离钻头的则称钻柱稳定器，通常使用两个，有更多的。通过不同的钻具组合和调整稳定器彼此间之距离便可实现增斜、降斜或稳斜作业。外径可控稳定器又被称为变径稳定器，它们是伴随定向钻井技术发展起来的，大都用作近钻头稳定器。因为这种稳定器的外径是可变的，因此有利于起下钻、避免由于卡钻而引发的钻井事故。此类变径稳定器存在三种不同的变径方式：1、单级；2、多级，如AGS；3、连续变径方式，如TRAKS。在我国使用较多的是单级变径稳定器，即在无钻井液循环时稳定器变径部分处初始位置，当有钻井液循环时变径部分伸出至最大位置。多级或连续变径方式稳定器指不用停钻将稳定器提出井口，在井下其变径部分的伸出量即可实现多级或连续的控制。如果在钻具组合中近钻头稳定器是这种变径稳定器，则不用起钻调整钻具组合便可在一定范围内实现增斜、降斜或稳斜功能。Traditional stabilizers are divided into two categories: fixed outer diameter and controllable outer diameter. Stabilizers with fixed outer diameters are widely used in drilling. The one close to the drill bit is called the near-bit stabilizer, and the one far away from the drill bit is called the drill string stabilizer. Usually two are used, and there are more. By using different drill tool combinations and adjusting the distance between the stabilizers, the operation of increasing, decreasing or stabilizing the inclination can be realized. The outer diameter controllable stabilizer is also called the variable diameter stabilizer, they are developed along with the directional drilling technology, and most of them are used as near-bit stabilizers. Because the outer diameter of the stabilizer is variable, it is beneficial to trip out and avoid drilling accidents caused by sticking. There are three different diameter reduction methods for this type of diameter reduction stabilizer: 1. single-stage; 2. multi-stage, such as AGS; 3. continuous diameter reduction, such as TRAKS. In our country, the single-stage variable-diameter stabilizer is mostly used, that is, the variable-diameter part of the stabilizer is at the initial position when there is no drilling fluid circulation, and the variable-diameter part extends to the maximum position when there is drilling fluid circulation. The multi-stage or continuous variable-diameter stabilizer means that the stabilizer is lifted out of the wellhead without stopping drilling, and the extension of the variable-diameter part in the downhole can realize multi-stage or continuous control. If the near-bit stabilizer in the drilling tool assembly is such a variable diameter stabilizer, then the function of increasing, decreasing or stabilizing the inclination can be realized within a certain range without pulling out the drill to adjust the drilling tool assembly.

常规变径稳定器结构包括轴体和变径总成两部分，所述轴体，即一段或数段联接在一起的向钻头传递扭矩和钻压的钻柱，所述的变径总成为由沿轴体轴向排列成若干行或在轴体圆周排列为若干螺旋行的若干个活塞组成。活塞可以在轴体横断面上按径向安置的活塞缸中往复运动，活塞缸通过流道将轴体(钻柱)中的钻井液与活塞联通。对于多级和连续变径方式稳定器其变径部分还包括液压执行机构和电子控制模块，关于此类稳定器结构和由它参与的钻具组合的增、降和稳斜功能这里不作详述。The structure of the conventional variable diameter stabilizer includes two parts, the shaft body and the variable diameter assembly. It consists of several pistons arranged in several rows along the axis of the shaft or in several helical rows on the circumference of the shaft. The piston can reciprocate in the piston cylinder arranged radially on the cross-section of the shaft body, and the piston cylinder communicates the drilling fluid in the shaft body (drill string) with the piston through the flow channel. For multi-stage and continuous variable diameter stabilizers, the variable diameter part also includes hydraulic actuators and electronic control modules. The structure of this type of stabilizer and the function of increasing, decreasing and stabilizing the drilling tool assembly in which it participates will not be described in detail here. .

钻进中，钻头破岩掘进、不同位置的稳定器随钻柱前进，囿于井壁，起定向作用。同时由于旋转钻进的缘故，近钻头稳定器有切向力作用于井壁，反之亦然。由于井底区域地层岩性的差异和各向异性，构造倾角、钻开井眼轨迹和井壁状态、钻具组合与井壁间动力学时变特征以及重力等影响因素的差异，凡此种种造成了井壁切向力作用的不对称性。由此使钻头(井眼轨迹)发生不确定的和难以简单控制的方位漂移。这是定向钻井中时常会发生的，也是难于解决的问题之一。During drilling, the drill bit breaks the rock and excavates, and the stabilizers at different positions advance with the drill string and are confined to the well wall to play a directional role. At the same time, due to the rotary drilling, the near-bit stabilizer has a tangential force acting on the borehole wall, and vice versa. Due to the difference and anisotropy of formation lithology in the bottom hole area, the difference in structural dip angle, the drilling trajectory and the state of the wellbore wall, the time-varying characteristics of the dynamics between the drilling tool assembly and the wellbore wall, and the gravity, etc. The asymmetry of the tangential force on the wellbore wall is revealed. As a result, the azimuth drift of the drill bit (wellbore trajectory) is uncertain and difficult to be easily controlled. This is a common occurrence in directional drilling, and it is also one of the most difficult problems to solve.

实用新型内容：Utility model content:

本实用新型要提供一种变径方位稳定器，以克服现有技术存在的会造成钻具或井眼轨迹发生方位漂移的问题。The utility model provides a variable-diameter azimuth stabilizer to overcome the problem in the prior art that the azimuth drift of the drilling tool or the trajectory of the borehole occurs.

为克服现有技术存在的问题，本实用新型的技术方案是：For overcoming the problems existing in the prior art, the technical scheme of the utility model is:

一种变径方位稳定器，包括旋转轴1和变径总成，旋转轴1上设置有导压孔17，其特殊之处在于，所述变径总成包括导向装置和筒状的不旋转套3，所述不旋转套3可旋转地嵌设于旋转轴1的外壁上，不旋转套3的外壁上沿圆周均布有数个条状导向槽，所述导向装置设置于导向槽内；所述导向装置由径向设置的导向套和定位件构成，导压孔17与导向套11连通，定位件可滑动地设置于导向套内，导向装置与不旋转套3上导向槽间设置有复位机构和限位机构。A variable-diameter azimuth stabilizer, including a rotatingshaft 1 and a variable-diameter assembly. The rotatingshaft 1 is provided with apressure guide hole 17. The special feature is that the variable-diameter assembly includes a guide device and a cylindrical non-rotating Thesleeve 3, thenon-rotating sleeve 3 is rotatably embedded on the outer wall of the rotatingshaft 1, the outer wall of thenon-rotating sleeve 3 is evenly distributed with several strip-shaped guide grooves along the circumference, and the guide device is arranged in the guide groove; The guide device is composed of a radially arranged guide sleeve and a positioning member. Thepressure guiding hole 17 communicates with theguide sleeve 11, and the positioning member is slidably arranged in the guide sleeve. Between the guide device and the guide groove on thenon-rotating sleeve 3, a Reset mechanism and limit mechanism.

上述定位件的纵向截面为“T”形。The longitudinal section of the positioning member is "T" shape.

上述定位件是圆柱。The above-mentioned positioning member is a cylinder.

上述导向装置是活塞组件，其中导向套是活塞套11，定位件是活塞7。The above-mentioned guide device is a piston assembly, wherein the guide sleeve is thepiston sleeve 11 and the positioning member is thepiston 7 .

上述复位机构是簧片，所述限位机构包括导向槽端部设置的限位块。The reset mechanism is a reed, and the limit mechanism includes a limit block provided at the end of the guide groove.

上述导向装置还包括翼肋4，翼肋4嵌设于导向槽内，圆柱或活塞7端部的外侧，所述复位机构是设置于翼肋4和导向槽间的簧片。The guide device also includes arib 4 embedded in the guide groove, outside the end of the cylinder orpiston 7, and the reset mechanism is a reed arranged between therib 4 and the guide groove.

上述翼肋4的一个端部铰接在不旋转套3的外壁上。翼肋斜推出导向槽。One end of the above-mentionedwing rib 4 is hinged on the outer wall of thenon-rotating sleeve 3 . The ribs are obliquely pushed out of the guide grooves.

上述限位机构是导向槽端部设置的限位块13和定位件上对应设置的限位台阶10。设置限位块简单方便，不但可防止定位件滑出且可通过调整限位块的位置来调整定位件的伸出度。The above-mentioned limiting mechanism is a limitingblock 13 provided at the end of the guide groove and a correspondinglimiting step 10 provided on the positioning member. Setting the limit block is simple and convenient, which not only prevents the positioning piece from slipping out, but also adjusts the extension of the positioning piece by adjusting the position of the limit block.

上述不旋转套3与旋转轴1之间远离钻头的一侧设置有径向轴承组15和推力轴承组5，靠近钻头的一侧设置有径向轴承组15。A radial bearinggroup 15 and a thrust bearinggroup 5 are arranged between thenon-rotating sleeve 3 and the rotatingshaft 1 on the side away from the drill bit, and a radial bearinggroup 15 is arranged on the side close to the drill bit.

上述不旋转套3与旋转轴1之间，径向轴承组15和推力轴承组5的内侧设置有动密封圈9，两轴承组外设置有调整环2，在调整环2中设置有防尘圈16。防尘圈16起到防止钻井液侵入油封轴承组的作用。Between the above-mentionednon-rotating sleeve 3 and the rotatingshaft 1, adynamic sealing ring 9 is provided on the inner side of the radial bearinggroup 15 and the thrust bearinggroup 5, and anadjustment ring 2 is arranged outside the two bearing groups, and adustproof ring 2 is arranged in theadjustment ring 2.Circle 16. The dust-proof ring 16 plays a role in preventing drilling fluid from invading the oil-sealed bearing group.

与现有技术相比，本实用新型的优点是：Compared with the prior art, the utility model has the advantages of:

本设计的思路在于将近钻头钻具旋转时作用于井壁而由此产生的旋转力矩变小，并且使各种影响旋转力矩不对称因素的作用降到最低程度。它保留了原有变径稳定器的优点，同时具备稳定方位的新功能。当翼肋因钻井液循环而紧贴井壁时，翼肋是不随旋转轴(钻头)转动的，因此避免了传统近钻头稳定器或普通变径稳定器由井壁施与的反扭力的作用，由此井眼轨迹的方位就不会随着井底岩性的各项异性、构造倾角和钻具组合的不同以及重力等因素的影响而发生不同程度的漂移。The idea of this design is to reduce the rotational moment generated by the drilling tool near the bit when it acts on the well wall, and to minimize the effects of various factors affecting the asymmetry of the rotational moment. It retains the advantages of the original variable-diameter stabilizer, and at the same time has the new function of stabilizing the azimuth. When the ribs are close to the well wall due to the circulation of drilling fluid, the ribs do not rotate with the rotating shaft (drill bit), thus avoiding the anti-torque force exerted by the well wall by the traditional near-bit stabilizer or ordinary variable-diameter stabilizer. Therefore, the azimuth of the wellbore trajectory will not drift to varying degrees due to the anisotropy of the bottom hole lithology, the difference of the structural dip angle and the drilling tool assembly, and the influence of gravity and other factors.

附图说明：Description of drawings:

图1是本实用新型的结构示意图；Fig. 1 is the structural representation of the utility model;

图2是图1的A-A的剖视图；Fig. 2 is the sectional view of A-A of Fig. 1;

图3是另一个实施例的结构示意图。Fig. 3 is a schematic structural diagram of another embodiment.

附图标记说明如下：The reference signs are explained as follows:

1-旋转轴，2-调整环，3-不旋转套，4-翼肋，5-推力轴承组，6-定位环，7-活塞，8-防尘圈，9-动密封圈，10-限位台阶，11-活塞套，12-钻井液，13-限位块，14-动密封圈，15-径向轴承组，16-防尘圈，17-导压孔。1-rotating shaft, 2-adjusting ring, 3-non-rotating sleeve, 4-wing rib, 5-thrust bearing group, 6-positioning ring, 7-piston, 8-dust ring, 9-dynamic sealing ring, 10- Limiting step, 11-piston sleeve, 12-drilling fluid, 13-limiting block, 14-dynamic sealing ring, 15-radial bearing group, 16-dust ring, 17-pressure guiding hole.

具体实施例的详细说明：Detailed description of specific embodiments:

参见图1和图2，一种变径方位稳定器，包括旋转轴1和变径总成，所述变径总成包括筒状的不旋转套3和导向装置，旋转轴1上设置有导压孔17。本实施例中旋转轴1由上旋转轴和下旋转轴组装对接成整体。Referring to Figures 1 and 2, a variable-diameter azimuth stabilizer includes a rotatingshaft 1 and a variable-diameter assembly. The variable-diameter assembly includes acylindrical non-rotating sleeve 3 and a guide device. Therotating shaft 1 is provided with aguide Pressure hole 17. In this embodiment, therotating shaft 1 is assembled and connected into a whole by an upper rotating shaft and a lower rotating shaft.

所说的不旋转套3与旋转轴1之间远离钻头的一侧设置有径向轴承组15和推力轴承组5，靠近钻头的一侧设置有径向轴承组15。所说的不旋转套3与旋转轴1之间，径向轴承组15和推力轴承组5的内侧设置有动密封圈9，两轴承组外设置有调整环2，在调整环2中设置有防尘圈16。由于彼此间轴承连接的缘故，旋转轴1仅向不旋转套3传递有限的负荷，一旦翼肋4贴井壁不旋转套3将不随旋转轴1旋转。轴承组均采用油封压力平衡结构。Aradial bearing group 15 and athrust bearing group 5 are arranged on the side away from the drill bit between the saidnon-rotating sleeve 3 and therotating shaft 1, and aradial bearing group 15 is arranged on the side close to the drill bit. Between the saidnon-rotating sleeve 3 and therotating shaft 1, adynamic sealing ring 9 is arranged on the inner side of theradial bearing group 15 and thethrust bearing group 5, and an adjustingring 2 is arranged outside the two bearing groups, and an adjustingring 2 is arranged in the adjustingring 2Dust ring 16. Due to the mutual bearing connection, therotating shaft 1 only transmits a limited load to thenon-rotating sleeve 3 , once therib 4 sticks to the well wall, thenon-rotating sleeve 3 will not rotate with therotating shaft 1 . Bearing sets adopt oil seal pressure balance structure.

所说的不旋转套3与旋转轴1之间远离钻头的一侧设置有径向轴承组15和推力轴承组5，靠近钻头的一侧设置有径向轴承组15。Aradial bearing group 15 and athrust bearing group 5 are arranged on the side away from the drill bit between the saidnon-rotating sleeve 3 and therotating shaft 1, and aradial bearing group 15 is arranged on the side close to the drill bit.

所说的不旋转套3与旋转轴1之间，径向轴承组15和推力轴承组5的内侧设置有动密封圈9，两轴承组外设置有调整环2，在调整环2中设置有防尘圈16。防尘圈16起到防止钻井液侵入油封轴承组的作用。Between the saidnon-rotating sleeve 3 and therotating shaft 1, adynamic sealing ring 9 is arranged on the inner side of theradial bearing group 15 and thethrust bearing group 5, and an adjustingring 2 is arranged outside the two bearing groups, and an adjustingring 2 is arranged in the adjustingring 2Dust ring 16. The dust-proof ring 16 plays a role in preventing drilling fluid from invading the oil-sealed bearing group.

不旋转套3的外壁上沿圆周均布有三个条状导向槽，所述导向装置固定设置于导向槽内，导向装置可以设置数个，本实施例中包括一字排开的三个。所说的导向装置由径向设置的导向套、可在导向套内滑动的定位件和翼肋4构成，导压孔17与导向套11相连通。本实施例中导向套11和定位件选择为活塞套和活塞7，它们组成活塞组件，所说的翼肋4嵌设于导向槽内、活塞7端部的外侧。The outer wall of thenon-rotating sleeve 3 is uniformly distributed with three strip-shaped guide grooves along the circumference, and the guide device is fixedly arranged in the guide groove, and several guide devices can be provided, including three lined up in this embodiment. Said guiding device is composed of radially arranged guide sleeves, locating elements andwing ribs 4 that can slide in the guide sleeves, and thepressure guiding holes 17 communicate with theguide sleeves 11 . In this embodiment, theguide sleeve 11 and the positioning member are selected as the piston sleeve and thepiston 7, which form a piston assembly, and the saidwing rib 4 is embedded in the guide groove and outside the end of thepiston 7.

所说的翼肋5的两端与导向槽两端之间设置有复位机构，只要能让翼肋5复位的结构均可采用，本实施例中选用弹簧钢板，即簧片作为复位机构。翼肋4被活塞7推向外侧平移直至贴上井壁后，在活塞停止工作收回时，翼肋4在簧片的作用下复位，翼肋的返回是复位簧片和钻柱上提过程中可能发生的井壁力以及钻柱振动综合效应的结果。A resetting mechanism is arranged between the two ends of the saidwing rib 5 and the two ends of the guide groove, as long as the structure that allows thewing rib 5 to reset can be adopted, in this embodiment, a spring steel plate, i.e. a reed, is used as the resetting mechanism. After thewing rib 4 is pushed to the outside by thepiston 7 and translates until it sticks to the well wall, when the piston stops working and retracts, thewing rib 4 resets under the action of the reed, and the return of the wing rib is possible during the lifting process of the reset reed and the drill string. The result of the combined effect of the occurring borehole wall forces and drill string vibrations.

所说的翼肋5的两端与导向槽两端之间设置有限位机构，限位机构是导向槽端部设置的限位块13和定位件上对应设置的限位台阶10。通过调整限位块的位置来调整定位件的伸出度。A limit mechanism is arranged between the two ends of saidwing rib 5 and the two ends of the guide groove, and the limit mechanism is alimit block 13 provided at the end of the guide groove and alimit step 10 correspondingly arranged on the positioning member. Adjust the extension of the positioning piece by adjusting the position of the limit block.

本产品的工作原理是：The working principle of this product is:

本设计中旋转轴1，亦称承载轴，转盘或井下动力钻具通过它向钻头传递钻压和扭矩，其旋转轴1中心圆柱状(包括其它形状)空间是循环钻井液的流动通道；旋转轴上下端分别由钻具扣与钻柱或钻头连接(包括其它各种能承受高压密封并能传递动力的钻具连接方式)；所说的不旋转套3为旋转轴1的外套，旋转轴1和不旋转套3之间用轴承连接。轴和套上下两端的轴承，保证了在翼肋伸开贴井壁后不旋转套保持相对静止，也即达到了在钻头附近削弱地层和钻具之间旋转力矩大小的作用。钻进中翼肋贴井壁时轴承同时承受纵向负荷和径向负荷。为延长轴承的使用寿命，采取油封和压力平衡技术。轴承在充满了润滑脂的平衡腔中，平衡腔是通过平衡活塞与钻柱和井壁环空间液柱沟通的。平衡腔中与活塞相邻的弹簧起压力平衡和热补偿作用。不旋转套的外壁上沿圆周均布有数个导向槽(在本项目中有呈120°分布的三个导向槽)，活塞组件和翼肋4(即导向装置)均设置于导向槽内，与常见的稳定器不同，活塞并不直接接触井壁，而是推动翼肋4伸出。导向槽和翼肋5上对应的限位部件可以控制翼肋5的平移伸出量并防止翼肋5脱出。活塞套11和钻柱内钻井液12之间由导压孔17连通成液压系统，轴和套的环空间隙形成钻井液能量传递空间来进行能量传递，当有钻井液循环时，活塞7因钻柱内外钻井液循环压差向外运动则是，翼肋4由活塞7推动向外伸出。当钻井液停止循环时，翼肋4两端的簧片迫使其复位，从而压迫活塞7复位。In this design, therotating shaft 1 is also called the bearing shaft, through which the turntable or downhole power drilling tool transmits drilling pressure and torque to the drill bit, and the cylindrical (including other shapes) space in the center of therotating shaft 1 is the flow channel for circulating drilling fluid; The upper and lower ends of the shaft are respectively connected to the drill string or drill bit by the drill buckle (including other drilling tool connection methods that can withstand high pressure sealing and transmit power); thenon-rotating sleeve 3 is the outer sleeve of therotating shaft 1, and therotating shaft 1 and thenon-rotating sleeve 3 are connected with bearings. The shaft and the bearings at the upper and lower ends of the sleeve ensure that the non-rotating sleeve remains relatively stationary after the ribs are stretched out to stick to the well wall, that is, the effect of weakening the rotational moment between the formation and the drilling tool near the drill bit is achieved. When the middle rib sticks to the well wall during drilling, the bearing bears longitudinal load and radial load at the same time. In order to prolong the service life of the bearing, oil seal and pressure balance technology are adopted. The bearing is in the balance chamber filled with lubricating grease, and the balance chamber communicates with the drill string and the fluid column in the annulus of the borehole wall through the balance piston. The spring adjacent to the piston in the balance chamber plays the role of pressure balance and thermal compensation. The outer wall of the non-rotating sleeve is evenly distributed along the circumference with several guide grooves (in this project, there are three guide grooves distributed at 120°). Common stabilizers are different in that the piston does not directly contact the well wall, but pushes thewing rib 4 to stretch out. The guide groove and the corresponding stopper on therib 5 can control the extension of therib 5 in translation and prevent therib 5 from coming out. Thepiston sleeve 11 and thedrilling fluid 12 in the drill string are connected through thepressure guide hole 17 to form a hydraulic system. The annular gap between the shaft and the sleeve forms a drilling fluid energy transmission space for energy transmission. When there is drilling fluid circulation, thepiston 7 due to When the circulating pressure difference of the drilling fluid inside and outside the drill string moves outward, thewing rib 4 is pushed outward by thepiston 7 . When the drilling fluid stops circulating, the reeds at both ends of therib 4 force it to reset, thereby pressing thepiston 7 to reset.

本方案中导向装置起到推靠定位的作用，因此各种结构都可以采用。参见图3，导向装置由径向设置的导向套11和定位件构成，定位件的纵向截面为“T”形。该结构简单易实现。In this scheme, the guiding device plays the role of pushing against positioning, so various structures can be adopted. Referring to FIG. 3 , the guiding device is composed of a radially arrangedguide sleeve 11 and a positioning piece, and the longitudinal section of the positioning piece is “T”-shaped. The structure is simple and easy to implement.

定位件还可以仅仅是圆柱，即类似活塞组件的结构，但其比活塞成本低，当然活塞组件的可靠性更高。The positioning member can also be just a cylinder, that is, a structure similar to the piston assembly, but its cost is lower than that of the piston, and of course the reliability of the piston assembly is higher.

本产品的重点在于：通过设置的不随着旋转轴1转动的不旋转套上导向装置推靠定位。因此不旋转套的设置是本产品的独到之处。The key point of this product is: the positioning is pushed against by the set non-rotating sleeve guide device which does not rotate with therotating shaft 1 . Therefore, the setting of the non-rotating sleeve is the unique feature of this product.

Claims (10)

Translated fromChinese

1.一种变径方位稳定器，包括旋转轴(1)和变径总成，旋转轴(1)上设置有导压孔(17)，其特征在于：所述变径总成包括导向装置和筒状的不旋转套(3)，所述不旋转套(3)可旋转地嵌设于旋转轴(1)的外壁上，不旋转套(3)的外壁上沿圆周均布有数个条状导向槽，所述导向装置设置于导向槽内，导压孔(17)与导向套(11)连通；所述导向装置由径向设置的导向套和定位件构成，定位件可滑动地设置于导向套内，导向装置与不旋转套(3)上导向槽间设置有复位机构和限位机构。1. A variable-diameter azimuth stabilizer, comprising a rotating shaft (1) and a variable-diameter assembly, the rotating shaft (1) is provided with a pressure guide hole (17), characterized in that: the variable-diameter assembly includes a guiding device and a cylindrical non-rotating sleeve (3), the non-rotating sleeve (3) is rotatably embedded on the outer wall of the rotating shaft (1), and several strips are evenly distributed along the circumference on the outer wall of the non-rotating sleeve (3). The guiding device is arranged in the guiding groove, and the pressure guide hole (17) communicates with the guiding sleeve (11); the guiding device is composed of a radially arranged guiding sleeve and a locating piece, and the locating piece is slidably arranged In the guide sleeve, a reset mechanism and a limit mechanism are arranged between the guide device and the upper guide groove of the non-rotating sleeve (3).2.根据权利要求1所述的一种变径方位稳定器，其特征在于：所述定位件的纵向截面为“T”形。2. The variable-diameter azimuth stabilizer according to claim 1, characterized in that: the longitudinal section of the positioning member is "T"-shaped.3.根据权利要求1所述的一种变径方位稳定器，其特征在于：所述定位件是圆柱。3. The variable-diameter azimuth stabilizer according to claim 1, wherein the positioning member is a cylinder.4.根据权利要求1所述的一种变径方位稳定器，其特征在于：所述导向装置是活塞组件，其中导向套是活塞套(11)，定位件是活塞(7)。4. A variable-diameter azimuth stabilizer according to claim 1, characterized in that: the guide device is a piston assembly, wherein the guide sleeve is a piston sleeve (11), and the positioning member is a piston (7).5.根据权利要求1、2、3或4所述的一种变径方位稳定器，其特征在于：所述复位机构是簧片，所述限位机构包括导向槽端部设置的限位块(13)和定位件上对应设置的限位台阶(10)。5. A variable-diameter azimuth stabilizer according to claim 1, 2, 3 or 4, characterized in that: the reset mechanism is a reed, and the limit mechanism includes a limit block set at the end of the guide groove (13) and the limit step (10) correspondingly arranged on the locating piece.6.根据权利要求3或4所述的一种变径方位稳定器，其特征在于：所述导向装置还包括翼肋(4)，翼肋(4)嵌设于导向槽内，圆柱或活塞端部的外侧，所述复位机构是设置于翼肋(4)和导向槽间的簧片。6. A variable-diameter azimuth stabilizer according to claim 3 or 4, characterized in that: the guide device also includes a rib (4), the rib (4) is embedded in the guide groove, and the cylinder or piston On the outside of the end, the reset mechanism is a reed arranged between the wing rib (4) and the guide groove.7.根据权利要求6所述的一种变径方位稳定器，其特征在于：所述翼肋(4)的一个端部铰接在不旋转套(3)的外壁上。7. The variable-diameter azimuth stabilizer according to claim 6, characterized in that: one end of the wing rib (4) is hinged on the outer wall of the non-rotating sleeve (3).8.根据权利要求7所述的一种变径方位稳定器，其特征在于：所述限位机构是导向槽两边端部设置的限位块，翼肋(4)对应的端部设置有与之对应的限位台阶。8. A variable-diameter azimuth stabilizer according to claim 7, characterized in that: the limiting mechanism is a limiting block provided at both ends of the guide groove, and the end corresponding to the wing rib (4) is provided with a The corresponding limit steps.9.根据权利要求1、2、3、4所述的一种变径方位稳定器，其特征在于：所述不旋转套(3)与旋转轴(1)之间远离钻头的一侧设置有径向轴承组(15)和推力轴承组(5)，靠近钻头的一侧设置有径向轴承组(15)。9. A variable-diameter azimuth stabilizer according to claim 1, 2, 3, 4, characterized in that: the side away from the drill bit is provided between the non-rotating sleeve (3) and the rotating shaft (1) The radial bearing group (15) and the thrust bearing group (5) are provided with a radial bearing group (15) near the side of the drill bit.10.根据权利要求9所述的一种变径方位稳定器，其特征在于：所述不旋转套(3)与旋转轴(1)之间，径向轴承组(15)和推力轴承组(5)的内侧设置有动密封圈(9)，两轴承组外设置有调整环(2)，在调整环(2)中设置有防尘圈(16)。10. A variable-diameter azimuth stabilizer according to claim 9, characterized in that: between the non-rotating sleeve (3) and the rotating shaft (1), radial bearing groups (15) and thrust bearing groups ( 5) is provided with a dynamic sealing ring (9) on the inner side, an adjustment ring (2) is provided outside the two bearing groups, and a dust-proof ring (16) is provided in the adjustment ring (2).

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