RU22175U1 - VALVE-BASHMAK - Google Patents

Description

1J111 f Chmg

Shoe shoe

The utility model relates to oil and gas production and is intended to equip the bottom of casing strings.

Various badges of Badzhaks are known, for example, BP, BK, consisting of corsch with a tip. The disadvantage of these shoes is the inability to prevent the entry of cement into the columns} from the annular space 1.

A combined shoe-valve is known which is part of the casing assembly and consists of a body with a tip, in the cavities of which a saddle is mounted and spring-loaded interacting with it. Radial-inclined openings are made in the walls of the casing, cobiting the internal cavity of Kopnjca with the extraneous medium 2.

A drawback of the shoe valve is that in the process of casing the casing, a large amount of fluid (boron solution, flushing fluid) is displaced from the well through the annulus, since the entrance to the columns is blocked by a non-tight element. To equalize the pressure, this requires an additional stage operation - topping up the wells with flushing fluid.

The objective of the utility model is to create a shoe-valve design that will provide a smaller or complete elimination of topping up the well.

The problem is solved by the fact that the inventive valve-shoe, consisting of a hollow Kopirfca with a tip, which is stopped by a saddle and Ez1shodeys1vuyushchaya with him a spring-loaded element :, and in the walls are made radially MPK E 21 in 34/10 E 21 V 17/14

inclined channels communicating: the uterine cavity with the external environment differs from liSsecTHoro solutions in that between the saddle and the supported element there are inserted support rods, 43ciii4HO placed in radially-inclined channels, while centering bars are fixed on the outer surface of the housing.

The drawing shows a casing view of the valve-shoe in section.

The shoe valve consists of a hollow body 1 with a tip 2. Radially-inclined slider channels 3 are made in the walls of the hollow body 1. In the cavity 1, a seat 4 and a ball 5 are mounted, pressed by a PRZZh1Shoy 6 to the support rods 7, inserted between the saddle 4 and the ball 5 and partially placed in the channels 3, On the outer surface of the housing 1, a centering of the 1st lath of the strap 8 is fixed.

The device operates as follows.

The flap shoe crashes to the 1 st end of the casing (not shown in the drawing). The column, together with the flap shoe, is lowered into the squway. At E1X) M, the liquid located in the borehole melts into the column through the openings 3 of the shoe-valve and the gap, forming 51B1, is inserted by the rods 7 with the ball 5 and the seat 4. The burning in the column, which increases the pressure in the column and annulus, excludes the operation dottu wells. In addition, the liquid was not forced out by the column to the surface, but nocTjTiaeT into its cavity, which ensured the manufacturability of the column operation.

In the process of cr cica casing, the need arises for the flushing of wells. When flushing B casing, the combed amount of flushing fluid is supplied. The flow of this fluid acts on the ball 5j which, compressing the spring 6, the waste of the creep, freeing the rods 7, which are carried out by the fluid flow through

channels 3 for Щ) valves. This process is reduced by centering strips 8, which do not allow the shoe valve to move relative to the axis of the well and provide free exit of the rods 7 through the channels 3. After washing, the ball 5, thanks to

lipyatiiHe b, is shifted upwards before landing on the seat 4. Thus, the valve is guided for further work as a non-return valve. If it is necessary to further lower the casing, it is n: cya with a doge.

An additional effect achieved by the inventive device, thanks to the cshrilling auger, is to ensure accurate conductivity of the well with further drilling.

Used sources:

1. Pipes of oil assortment. Ed. A.E. Saroyan. Siravochnik, M., Nedra, 1987, p. 231-236.

2.Hz LLfflURTON Sales and service catalog. 1963, Kalliburton company. Duncan. Oklahoma, c. 68

Claims (1)

A shoe valve, consisting of a hollow body with a tip, inside which a saddle and a spring-loaded element interacting with it are installed, moreover, radially-inclined channels are made in the walls of the body, communicating the internal cavity with the external environment, characterized in that underlay is inserted between the seat and the spring-loaded element rods partially placed in radially-inclined channels, while on the outer surface of the housing, centering bars are fixed.