RU96394U1 - EQUIPMENT FOR LINING A CASING PIPE - Google Patents

Abstract

 Casing string binding equipment, comprising a body mounted on a well conductor, an annular cover screwed onto the body, and through which a pipe string is passed, a centralizer with a seating cone and longitudinal through holes, a typical pipe sleeve, the lower end of which rests on the upper end a centralizer, an annular seal, characterized in that the centralizer is located in the upper part of the housing, and the centralizer seating cone is supported by a landing cone made on the inner surface orpusa, and the O-ring is installed between standard pipe coupling and the housing.

Description

The utility model relates to the field of oil production and can be used for tying casing strings.

Known equipment for tying a casing string according to AS RU 6831.

Known equipment includes a housing mounted on the conductor of the well, attached to the conductor using a threaded sleeve. An annular support with an internal landing cone is installed between the conductor and the housing. A centralizer with longitudinal through holes is installed on the annular support with an external landing cone. An annular cap is screwed onto the housing, through which a pipe string is passed. A typical pipe coupling of a column is supported by the lower end on the upper end of the centralizer. An annular seal is installed between the pipe string and the body. This technical solution was taken as the closest analogue - the prototype.

The prototype has the following disadvantages:

- increased weight due to the use in the design of the equipment of the ring support and coupling for attaching the housing to the conductor;

- the complication of the technological process of drilling a well as a result of installing an annular support inside the conductor, which interferes with the passage of the bits and narrows the range of bits used to their minimum size;

- the possibility of damage to the annular seal when replacing the wellhead equipment when the column pipe is turned out of the coupling.

The technical result of the proposed utility model is to eliminate the disadvantages of the prototype, namely:

- weight reduction equipment;

- improving technological capabilities when drilling wells;

- extension of the life of the annular seal.

The technical result is achieved by the fact that in the equipment for tying a casing string containing a body mounted on a well conductor, an annular cover screwed onto the body, and through which a pipe string is passed, a centralizer with a seating cone and longitudinal through holes, a typical pipe coupling, the lower end of which rests on the upper end of the centralizer, the ring seal, according to a utility model, the centralizer is located in the upper part of the housing, and the centralizer’s landing cone rests on the landing first taper formed on the inner surface of the housing, and an annular seal is installed between a typical pipe coupling and the housing.

The reduction in the number of parts used in the design of the equipment provides a reduction in its weight compared to the prototype, which in turn reduces the complexity of manufacturing and the cost of equipment.

The design of the proposed equipment allows to simplify the process of drilling a well by expanding the range of bits used for this due to the fact that no equipment parts are installed in the well conductor that impede the passage of bits.

The design of the proposed equipment provides an extension of the life of the annular seal, since when disassembling the equipment, the seal may not be removed from a typical pipe coupling.

The essence of the proposed utility model is illustrated in the figure.

Equipment for tying a casing string includes a housing 1 screwed onto the conductor 2 of the well. A centralizer 3 with a seating cone 4 and longitudinal through holes 5 is placed in the upper part of the housing 1. Between a typical pipe sleeve 9 of the column 8 and the housing 1 is installed an annular seal 10. The lower end of the sleeve 9 rests on the upper end of the centralizer 3.

Claims (1)

Casing string binding equipment, comprising a body mounted on a well conductor, an annular cover screwed onto the body, and through which a pipe string is passed, a centralizer with a seating cone and longitudinal through holes, a typical pipe sleeve, the lower end of which rests on the upper end a centralizer, an o-ring, characterized in that the centralizer is located in the upper part of the housing, and the centralizer seating cone is supported by a landing cone made on the inner surface orpusa, and the O-ring is installed between standard pipe coupling and the housing.