SU599053A1

SU599053A1 - Device for cementing boreholes

Info

Publication number: SU599053A1
Application number: SU762434262A
Authority: SU
Inventors: Анатолий Андреевич Цыбин; Альберт Анатольевич Гайворонский; Юрий Григорьевич Апанович; Лев Хасанович Фарукшин
Original assignee: Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Буровой Техники
Priority date: 1976-12-24
Filing date: 1976-12-24
Publication date: 1978-03-25

Description

1one

Устройство касаетс креплени скважин, а именно устройств дл двухступенчатого и манжетного цементировани скважин.The device relates to the fastening of wells, namely, devices for two-stage and sleeve cementing of wells.

Известно устройство, состо щее из корпуса с радиальными отверсти ми нижней и верхней втулок, закрепленных на корпусе на срезных элементах, и приводитс в рабочее положение шаром , а после окончани цементировани отверсти в корпусе закрываютс верхней втулкой с помощью цементировочной пробки .A device consisting of a housing with radial openings of the lower and upper sleeves fixed to the housing on the shear elements is known and is brought to the working position by a ball, and after the cementing is completed, the holes in the housing are closed by the upper sleeve using a cementing plug.

Недостатком указанного устройства вл етс необходимость в разбуривани шара, пробки и цементного стакана между ними.The disadvantage of this device is the need to drill the ball, plug, and cement beaker between them.

Наиболее близким из известных технических решений к изобретению вл етс устройство дл цементировани скважин, включающее корпус, дифференциальную втулку с радиальными отверсти ми и срезной элемент 2J .The closest of the known technical solutions to the invention is a device for cementing wells, including a housing, a differential sleeve with radial holes, and a shear element 2J.

Однако такое устройство обеспечивает только циркул цию жидкости из затрубного пространства в колонну, а двухступенчатое и манжетное цементирование с помощью данного устройства невозможно.However, such a device provides only the circulation of fluid from the annulus to the column, and two-stage and lip-type cementing with the help of this device is impossible.

Цель изобретени - обеспечение возможности двухступенчатого и манжетного цементировани скважин без последующего разбуривани деталей устройства и цементного стакана.The purpose of the invention is to provide the possibility of two-stage and sleeve cementing of wells without the subsequent drilling of parts of the device and cement glass.

Это достигаетс тем, что на внутреней поверхности дифференциальной втулки выполнены продольные пазы, сообщающиес с радиальными отверсти ми дифференциальной втулки, причем в ее верхней части установлен толкательфиксатор .This is achieved by the fact that longitudinal grooves are connected to the radial openings of the differential sleeve on the inner surface of the differential sleeve, with a push rod fixer installed in its upper part.

На фиг. 1 изображено предлагаемое устройство в исходном нерабочем положении; на фиг. 2 - то же, в период закачивани второй ступени цементного раствора; на фиг. 3 - то же, после окончани цементировани скважины.FIG. 1 shows the proposed device in the initial non-working position; in fig. 2 - the same, in the period of injection of the second stage of cement; in fig. 3 is the same after the completion of the cementing of the well.

Claims

The device consists of a housing 1 with a radial hole 2 and a latch J on the inner surface; a sub 4 connected to the housing 1 and containing a spring-loaded shear pin 5; differential sleeve b, having grooves 7 on the inner surface, communicating with the radial holes 8 in the sleeve, and longitudinal grooves 9 on the outer surface of the shear element 10, which the sleeve 6 holds on the spring ring 11 / held on the inner surface of the sleeve 6 with the change of the shear element 10, the spring pusher -fixer 12, mounted on the upper surface of the sleeve 6; a spring ring 13 held by a sliding pin on the inner surface of the casing COLUMN 14; the ball 15 /. of the element for cutting the element .10) of the cementing plug 16. The device works as follows. Before pumping the second stage of the cement slurry with two-stage cementing or the first portion of the solution with the cuff cementing, overlap the perforation 9 15, Not a second, under its own weight, falls in the squeezing fluid and sits on the spring ring 11, shutting off the internal channel of the casing string. When the calculated excess pressure is reached at the mouth of The shear element 10 holding the sleeve b in the case 1 and the ring 11 on the sleeve b is cut off, after which the spring ring 11 lies between the sleeve b and the casing column l4, and the ball 15 sits on the spring ring 13, which is fastened with a shear pin column 14, intersecting the inner channel of the casing.When overpressure, the wellhead differs into sleeve 6, it is upward due to the increase in axial force acting on the face nO surface Г of sleeve b above the total axial force acting on the end surface ti A and B (the pressure in the column is greater than the pressure in the annular space). The spring-loaded shear pin 5 enters the groove 9 simultaneously with the combination of the radial holes 2 and 8, after which the pressure at the mouth of the well drops and the flushing fluid flows from the column into the annulus. In this position of the device, the second stage of the two-stage van is pumped. When reducing the pressure in the column 14 for any reason, the sleeve 6 is kept from moving by a spring-loaded shear pin 5. After the cement is cemented, | The tamping plug 16 sits on the spring pusher-clamp 12 and when the calculated overpressure is created at the wellhead, the spring pin 5 is cut off, and the spring pusher-Clamp 12 is removed into the translation groove 4. Next, under the pressure of the cement plug 16, it sits on the ball 15, This is from the moment when the plug 16 blocks the holes 2 and 8, the cement slurry from the interval between the ball 15 and the plug 16 is extruded into the annulus through the longitudinal grooves 7 communicating with the radial holes in the bush. Under the action of overpressure at the wellhead, the plug 16 creates an axial load on the ball 15, which cuts off the pins that hold the spring ring 13 on the obs, the adorn string 14, 1 After that, the spring ring enters the groove on the inner surface of the column 14, and the ball 15 under Self 9 to all falls in the casing shoe Cis aufcisaieT; giving laziness to; yctb yri & Toi "t atulia 6 will move: I will go to / to the bottom of the bed and zafi1 sylyatsya from movements and down, respectively, the latch 3 and the pusher-latch 12. i. Since the total area of the upper end surfaces A and B of sleeve 6 is larger than the area of the lower end surface F (bottom end surface B is not working), then to move the sleeve to a better lower position after the end of the cementing process, pressure on the wellhead can be dump not to zero. When lowering into the casing, pumping koshressornmk or other pipes for the development of a well or for other work, cementing plug 16 is pushed; dB; casing shoe. The proposed device does not.; Requires the scouring of a ball, cork and cement cement between them. This saves about 3,500 rubles on a two-stage or cuff cementing of one casing. Apparatus of the Invention A device for cementing a well bore, comprising a housing, a differential sleeve with radial holes, and a shear element, characterized in that, in order to provide the possibility of two-stage and sleeve blending of wells, then subsequent drilling of the parts of the device and the cement cup, on the inner surface a differential bushings are made longitudinal