The design of the multilayer wells

 

(57) Abstract:

The invention relates to the oil industry, in particular to the wells, revealing when drilling several productive strata. Provides enhanced functions well due to the improvement of its design and the reduction of material costs by simplifying repair and insulation works. The device includes a casing with a mounting coupling, above the producing formation. It lowered the column tubing with a plunger having a seal and interacting with the installation sleeve. According to the invention in the casing between the productive strata and below the additional installation of the coupling. Column tubing is provided with an additional plungers. They are located at such distances from each other, and that the installation of the clutch casing, and interact with the relevant installation couplings. Part of the intervals of the column tubing between the perforated plungers. 1 Il.

The invention relates to the oil and gas industry, in particular to the wells, revealing when Boo is amerom casing (114 mm and less).

Known for well design, casing containing a column with the installation sleeve and tubing pipes (tubing) with patrolsim device (see ed. St. USSR 313958, BI 27, 1971).

The disadvantages of the design are available pokerwise devices that require installation of additional technological operations.

Closest to the proposed device is well design with the installation of the coupling, above the productive formation, which lowered the column tubing with a plunger having a sealing elements that interact with the installation of the clutch, with the possibility of axial movement (see "Gas supply", 3, 1975, S. 33-34).

The shortcoming of the prototype is that it does not allow you to work simultaneously with multiple layers.

Solved the technical problem is to create a well design that would allow the development, operation and repair of multi-reservoir field with a minimum of material and time expenses.

The aim of the invention is to expand the functionality of the wells due to improvements in its construction and which is achieved by the described design of the multilayer wells including casing installation sleeve above the productive strata, which lowered the column tubing with plunger interacting with the installation sleeve.

What's new is that in the casing between the productive layers placed additional installation of the coupling, and the column tubing is provided with an additional plungers mounted with the possibility of interaction with the relevant installation couplings, with some periods of the column tubing between the perforated plungers.

From available sources, the patent and scientific literature we are not aware of the claimed set of distinctive features, therefore, the proposed construction of a multilayer wells meets the criterion of "significant differences".

The drawing shows a diagram of the well design.

Well design contains casing 1 from the installation couplers 2, interact with the plungers 3, installed on the tubing string 4. Casing has perforations 5 against each of the productive layers 6 and 7. Some of the intervals of the casing melem 9.

Design works in the following way:

After drilling in the manufacture of geophysical research and identify prospective reservoirs. Then lowered into the well and cement casing 1 from the installation couplers 2, placed between the alleged productive layers 6 and 7 and above productive upper layer 6 and lower 7. Then produce the perforation 5 of the casing 1 against each of the productive layers 6 and 7. Then make the development of productive formations, exploring and defining the productivity and composition of products produced in each of the producing formations. Then make conclusions about the feasibility of using one or another of the productive formation. Further in the hole down the drill pipe 4 with the plungers 3 located at the same distances from each other, and that the installation of the clutch 2 in the casing 1, the presence of the plunger 3 seals 9, prevent the flow of fluid between the productive strata. The plot of the casing 4 between the plungers 3, which is opposite the productive formation 6, the results of research recognized as suitable for use, has a hole 8.

In the case of changing the situation in the periodon tubing 4 extract, perforated holes 7 plot move to another level of the productive layer 6. Then the tubing is lowered into the well, in the previous reservoir 6 is disconnected from the operation, and the next 6 against which is perforated by holes 7 a section of tubing that is included.

The example describes the well with two productive strata, actually there may be any number.

Well design is also suitable for separate, simultaneous operation of reservoirs.

Using the proposed design of the multilayer wells allows you to extend its functionality through timely enable and disable operation of productive layers, and to reduce material costs by accelerating and simplifying repairs.

Sources of information

1. Auth. St. USSR 313958, BI 27, 1971.

2. I. N. Boyko, N. N. Miller, A. S. Mite "New pokerwise device, Gas supply, 3, 1975, S. 33-94.

The design of the multilayer wells, including a casing with a mounting coupling, above the productive layers, which lowered the column tubing t is th column in between the productive strata and below the additional installation of the coupling, and the column tubing is provided with an additional plungers located at such distances from each other, and that the installation of the clutch casing, and cooperating with relevant installation couplings, with some periods of the column tubing between the perforated plungers.

 

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SUBSTANCE: device has operation columns of upper and lower well zones, placed eccentrically one inside the other in upper zone of well, double airlift column, mounted in upper well zone, and double airlift column, connected to operation well of lower well zone, separation column, mounted coaxially to operation column of upper well zone, and cementation pipe. According to invention, in a well with significant power of non-productive zone it is equipped with additional separating column with cleaning channels for lowering drilling tool therein and drilling well to lower well zone with removal of drilling slurry by double airlift column of upper zone through cleaning channels. Additional separating column is combined coaxially with operation column of lower well zone and is rigidly fixed to separation column.

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EFFECT: higher efficiency.

25 cl, 11 dwg

FIELD: oil industry.

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EFFECT: increased oil output due to improved high-permeable formation injectivity and decreased number of injection wells.

1 ex, 2 dwg

FIELD: oil and gas industry, particularly downhole equipment to be installed in oil and gas reservoirs.

SUBSTANCE: device comprises hollow body with discharge channels threadedly connected to flow string. The body is provided with shell having orifices and pressure nut. Spring, valve and replaceable head are arranged in annular gap between the body and the shell. The spring is installed between upper and lower support washers. The valve is located between upper support washer and shell ledge. The replaceable head is secured to the shell by means of pressure nut. Sleeve with orifices is coaxially installed inside the body between body extensions so that the sleeve may be displaced by wire-line equipment tool to misalign or align sleeve and shell orifices with discharge body channels.

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FIELD: oil and gas production industry, particularly methods or apparatus for obtaining oil, gas, water and other materials from multizone wells.

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EFFECT: extended water-free oil well operation period, increased oil recovery and reduced oil production costs due to elimination of water lifting charges and prevention of well bore zone contamination.

4 dwg

FIELD: oil industry.

SUBSTANCE: method comprises setting the jet pump into the well. The housing of the pump is provided with the central nozzle, openings for inflow of fluid, and radial passages. The openings for inflow of fluid are shut off by means of valving members. The jet pump is mounted between the top and bottom oil-bearing beds.

EFFECT: enhanced efficiency.

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FIELD: oil production, particularly to produce watered oil and produced water utilization.

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