SU989041A1

SU989041A1 - Arrangement for pipeless casing-in of wells

Info

Publication number: SU989041A1
Application number: SU813299923A
Authority: SU
Inventors: Петр Алексеевич Фролов; Сергей Алексеевич Фролов
Original assignee: Московский Ордена Трудового Красного Знамени Геологоразведочный Институт Им.С.Орджоникидзе
Priority date: 1981-06-16
Filing date: 1981-06-16
Publication date: 1983-01-15

Description

Изобретение относитс к креплению скважин The invention relates to the fastening of wells.

Известно устройство дл беструбного 1 реплени скважин, включающее Двухр дную опалубку, котора выполнена в видё внутренней металлической трубы, и закрепленной концентрически на ней- эластичной трубы. Дл работы устройстЗва используют цементировочный насос и насос дл подачи жидкости в эластичную трубу l.A device for tubeless drilling 1 wells is known, which includes a double-row formwork, which is made in the form of an internal metal pipe, and is fixed concentrically on a neo-elastic pipe. For operation of the device, a cementing pump and a pump for supplying fluid to the flexible pipe l are used.

Недостатки этого устройства заключаютс в том, что опергщии спуска и подъема трудоемки и занимают много времени; составные части двухр дной опалубки изготовлены из дорогосто щих материалов (стальные трубы, эластичный материал наружной трубы поджимающей оболочки, специальные эластичные соединительные элементы).The disadvantages of this device are that descending and ascending are laborious and time consuming; The component parts of double-deck formwork are made of expensive materials (steel pipes, elastic material of the outer tube of the clamped shell, special elastic connecting elements).

Наиболее близким к ..изобретению вл етс устройство дл беструбного креплени скважин, включающее поджимающую оболочку, принимающую цилиндрическую оболоку, и элемент герметиЗсщии оболочки на устье скважины 2 J.The closest to the invention is a device for pipeless mounting of wells, including a push-up shell, receiving a cylindrical shell, and a sealing element. The outer shell at the wellhead 2 J.

Недостатками устройства вл ютс трудность извлечени оболочки из скважины и большие затраты времени и средств на крепление скважины.The drawbacks of the device are the difficulty of removing the casing from the well and the time and cost involved in securing the well.

Целью изобретени вл етс повышение надежности извлечени оболочки из скважины и снижение затрат времени и средств на ее крепление.The aim of the invention is to increase the reliability of removing the casing from the well and reducing the time and cost involved in its fastening.

Поставленна цель достигаетс тем, что в уртройстве дл беструбного креплени скважин, включающем поджимающую оболочку, принимающую цилиндрическую форму, и элемент герметиза- . ции оболочки на устье скважины, нижн часть поджимающей оболочки снабжена центраторомгут желителем и установленным по спирали на ее внутренней поверхности упругим элементом с фиксаторами, жестко св занными с поджимающей оболочкой, причем упругий элемент установлен в фиксаторах с возможностью их относительного перемещени , а концы упругого элемента жестко св заны с поджимающей оболочкой.The goal is achieved by the fact that in a well-tubeless drilling system, which includes a clamping sheath, which assumes a cylindrical shape, and a sealing element -. shell at the wellhead, the lower part of the clamped shell is provided with a central chopper and a chopper and an elastic element mounted in a spiral on its inner surface with clamps rigidly connected to the clamping shell, the elastic element being installed in the clamps with the possibility of their relative movement, and the ends of the elastic element are rigidly connected associated with a pressure case.

Кроме того, поджимающа оболочка выполнена из тонкого материала, а упругий элемент выполнен в виде резиновой ленты.In addition, the biasing shell is made of a thin material, and the elastic element is made in the form of a rubber band.

Claims

FIG. 1 shows a diagram of the operation of the device at the time of sinking of the cement; in fig. 2 shows a device at the moment of its extraction from a well; FIG. 3 - section of the lock. The device for pipeless mounting of the borehole walls consists of a clamp of a metal pipe centralizer-ut gel 1, attached to the lower end of the biasing shell 2, on the inner surface of which elastic element 4 is attached by means of fixers 3 (for example, rubber tape). The shell 2 is attached to the nozzle 5, through which, using the sealing device 6 and the cementing head 7, cement mortar and squeezing fluid is fed into the well. The pressing shell can be made of a thin material that does not let in water, and its outer surface can be coated with a lubricant preventing it from sticking to the cement (graphite lubricant of oil products). The elastic element is rigidly fixed to the shell at the ends, and along the length with the help of clamps, which do not prevent it from stretching and compressing. The sealing device allows the pressure in the well to be adjusted to prevent excessive expansion of the shell in its upper part. The device works as follows. In the drilled well with the sealing device 6 under the action of the weight of the centralizer-ut gel 1 opus frame woven sheath 2 with an elastic element 4 attached to it. The upper part of the shell 2 is fixed on the nozzle 5, which is connected to the sealing device b and the cementing head 7. Through the cementing head 7 and the pipe 5 into the shell pump the solution and squeezing fluid. Under the pressure of the squeezing fluid, the cement mortar enters the well, the shell takes on a cylindrical shape, stretches the elastic element, and feeds the cement slurry into the well until it solidifies, forming a cement shell. A uniform annular gap is provided by self-centering in the prize of the borehole at the expense of the centralizer-gel 1 and in the upper part of the forced part by means of a nipple 5. After the cement hardens, the cementing head 7 is removed and the sealing device 6 is released. The elastic element relieves shell and detach from the cement glass. When the shell is lifted, it is detached from the centralizer-ut gel, which is attached to it in this way, for example, it is glued, so that the pull-off force does not exceed the strength of the shell. The end of the work is winding the fabric casing with a rubber element on the drum. The economic effect of using the proposed device can be obtained by reliably removing the casing and reducing the time required for the lifting and lifting operation. With an annual fastening volume of 300,000 m, the economic effect can be obtained in 140 thousand rubles. Claim 1. A device for best-fixing wells, including a clamping shell, which assumes a cylindrical shape, and a sealing element of the shell at the wellhead, characterized in that, in order to increase the reliability of removing the shell from the well and reduce the time and cost of its mounting, a part of the clamping shell is provided with a centralizer-choke and installed in a spiral on its inner surface by an elastic element with clamps rigidly connected to the clamping shell, and This element is mounted in latches with the possibility of their relative movement, and the ends of the elastic element are rigidly connected to the pressure case. 2. The device according to claim 1, OT l Ich aushee so that the biasing sheath is made of a thin material, and the elastic element is made in the form of a rubber band. Sources of information taken into account in the examination 1: USSR Copyright Certificate No. 750042, cl. E 21 V 33/13.

2. USSR author's certificate No. 21445.5, cl. E 21 V 33/14, 1965 (prototype)