SU646110A1

SU646110A1 - Electromechanical lock for deep-well instruments

Info

Publication number: SU646110A1
Application number: SU772441608A
Authority: SU
Inventors: Григорий Алексеевич Белышев; Тимерхат Габдуллович Габдуллин
Original assignee: Всесоюзный научно-исследовательский институт нефтепромысловой геофизики
Priority date: 1977-01-07
Filing date: 1977-01-07
Publication date: 1979-02-05

Description

1one

Изобретение относитс к промысловой геофизической аппаратуре, а именно к устройствам дл фиксации положени исполнительного органа скважинного прибора.The invention relates to field geophysical equipment, namely, devices for fixing the position of the actuator of the downhole tool.

Специфические особенности скважинных приборов дл исследовани действующих скважин, диаметр которых не превышает 42 мм (а в отдельных случа х 25 мм) накладывают конструктивные особенности на используемые в них механизмы, которые должны вписыватьс в эти габариты и при этом обладать высокой надежностью. The specific features of downhole tools for the study of existing wells, the diameter of which does not exceed 42 mm (and in some cases 25 mm) impose design features on the mechanisms used in them, which must fit into these dimensions and at the same time have high reliability.

Известен фиксатор, содержащий два подпружиненных штуцера, шток с втулками и шариками,которые вход т в радиальные отверсти l.A retainer is known, which contains two spring-loaded chokes, a stem with bushings and balls which enter radial holes l.

Известен также фиксатор дл скважинных приборов, содержащий корпус, стопорные шарики,установленные в корпусе , профилированный шток, и упр-авл смую электромагнитом обойму f2.Also known is a retainer for downhole tools, comprising a housing, lock balls mounted in the housing, a profiled rod, and control-removing the f2 holder by an electromagnet.

Недостатком известных устройств вл етс ненадежна фиксаци штока промежуточных положени х при наличии посто нной нагрузки на шток во всем диапазоне его перемещени .A disadvantage of the known devices is the unreliable fixation of the rod to intermediate positions in the presence of a constant load on the rod in the entire range of its movement.

Целью изобретени вл етс повышение надежности фиксации штока в промежуточных состо ни х при нагрузке на нем во всем диапазоне перемещениThe aim of the invention is to increase the reliability of the fixation of the rod in intermediate states with a load on it throughout the entire range of movement.

Поставленна цель достигаетс установкой в корпусе дополнительног звена стопорных шариков,зафиксированных обоймой, при этом звень шариков установлены соответственно на обращенных друг к другу сторонах кольцевых выступов штока, а также тем, что ширина fl кольцевой проточки обоймы и рассто ние t между ос ми стопорных .шариков радиуса г удовлетвор ют условию tl Г f при зтом в каждое отверстие корпуса может быт установлено по нескольку стопорных шариков одного диаметра.The goal is achieved by installing additional links of the locking balls fixed by the clip in the housing, while the links of the balls are installed respectively on the sides of the annular protrusions of the stem facing each other, and also because the width fl of the ring groove of the holder and the distance t between the axes of the stop balls The radius r satisfies the condition tl r f with several locking balls of the same diameter can be installed in each opening of the housing.

На фиг. 1, 2 и 3 изображены варианты электромеханического фиксатора , содержащие одни и те же конструктивные элементы и отличающиес габаритами .FIG. Figures 1, 2 and 3 show variants of an electromechanical fixative containing the same structural elements and differing in dimensions.

Устройство содержит корпус 1, звень стопорных шариков 2 и 3, расположенные в отверсти х корпуса 1 и зафиксированные обоймой 4,5 - шток с кольцевыми выступами, 6 - электромагнит , св занный с обоймой 4, подпружиненной к корпусу 1 пружиной 7.The device comprises a housing 1, links of locking balls 2 and 3 located in the openings of the housing 1 and secured by a clip 4.5 — a stem with annular projections, 6 — an electromagnet connected to the clip 4, a spring 7 spring-loaded to the housing 1.

Claims

In the initial state, the holder 4 is positioned so that the stopper / e balls of Even 3 are against the ring protrusion of the holder and do not fix the stem 5, and the lock balls of the Even 2 partially protrude inside the housing 1, forming a rigid stop for the rod 5. In the moment of applying voltage to the winding of electromagnet 6 clip 4 is in such a position that CTonopHUv. the balls of the link 2 are located against the annular grooves of the holder 4 and release the rod 5, and the locking balls of the link 3 protrude into the interior of the housing 1, and fix it in an intermediate position. After removing the tension, the yoke 4 occupies the initial state and the rod 5 is again fixed with locking balls Aries 2, while the locking balls of link 3 are against the annular groove. Thus, one cycle of switching and latching of stem 5 is completed, at which, depending on. the position of the yoke 4, the stem 5 will be the FI Gyyvat either with the locking balls of link 2 or link 3, the ring groove in the yoke 4 is designed so that the locking balls of one link, providing the next fixation of the rod (link 3 in Fig. 3), are triggered ahead of to stop balls of another link, which at the moment fix the rod (link in figure 1. 2). This is ensured by the fact that the width of the groove in the cage is chosen equal to the distance 6 between the stopper balls of the two links, or in lx) the width ti must be less than the distance –6 (see Fig.2 and 3 where T is paJntt c Tiarik In this case, during the forward and reverse course of the ram, the moment of preparing the next stop is ahead of the moment of removing the rod from the previous stop, which increases the reliability of stem fixation. Obviously, to reduce the stroke of the rod during the stitch cycle, it is necessary to reduce the diameter of the stop balls (Fig .1 and 2), which leads to a 6 thickness reduction the walls of the housing 1 and, accordingly, its strength. To avoid this, several balls of reduced diameter are installed in each opening of the housing, as shown in Fig. 3. In this way, the function of the elements and the principle of the latch is similar to those of Fig. 1 and 2. The device has a simple structure and small dimensions, which will allow it to be used in small-sized well equipment. Claim 1. Electromechanical fixer for downhole tools, comprising a housing with stop balls, a stem with the protrusions and the clutch controlled by the electroswitch, characterized in that, in order to increase the reliability of fixation in intermediate states under load, it is provided with an additional link of the locking balls fixed by the same yoke, while the links of the balls are mounted respectively on facing each friend sides of the annular protrusions of the rod. 2. Electromechanical retainer for downhole tools according to claim 1, differing in that the width 11 of the annular groove of the holder and the distance 6 between the axes of the stop balls of radius r satisfy condition ii - e - (. according to claim 1, differing from the fact that, in order to reduce overall dimensions, several locking balls of one digital device are installed in each opening of the housing. Sources of information taken into account during the examination 1. Author's certificate of the USSR 214999, class F 15 B- 15/26, 1967.

2. For the number 2366701 / 22-03, cl. E 21 B 47/00, 1976.

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