초록 ▼

A device for introducing high-pressure fluid through a well having a vertical passage with at least one valve and into a well having a well tubing into said vertical passage, has a lower part removably attachable to the well tubing, a hollow mandrel adapted to extend through the inner passage of the

A device for introducing high-pressure fluid through a well having a vertical passage with at least one valve and into a well having a well tubing into said vertical passage, has a lower part removably attachable to the well tubing, a hollow mandrel adapted to extend through the inner passage of the lower part and having a passage through which a high pressure fluid can be introduced, an upper part firmly connected with the mandrel to hold the mandrel and movable relative to the lower part between a distal position in which the upper part is spaced from the lower part and the mandrel is not introduced into the well tubing and a proximal position in which the upper part is located close to the lower part and the mandrel is introduced into the well tubing and passes through an area of the well tubing provided with the valve, so that when the high pressure fluid is introduced through the mandrel it can not affect the valve, the upper part having a port communicating the inner passage of the upper part with an outer side of the upper part, so that a pressure can be equalized through the port, or the well can be flowed through valve to a container.

대표청구항 ▼

1. A device for introducing high-pressure fluid through a well having a vertical passage with at least one valve and into a well having a well tubing, the device comprising a lower part having an inner passage and removably attachable to an upper part of the well tubing; a hollow mandrel adapted to

1. A device for introducing high-pressure fluid through a well having a vertical passage with at least one valve and into a well having a well tubing, the device comprising a lower part having an inner passage and removably attachable to an upper part of the well tubing; a hollow mandrel adapted to extend through said inner passage of said lower part and having an inner passage through which a high pressure fluid can be introduced; an upper part having an inner passage and a main valve providing access to the inner passage and the upper part being firmly connected with said mandrel so as to hold said mandrel and movable relative to said lower part between a distal position in which said upper part is spaced from said lower part and said mandrel is not introduced into the well tubing and a proximal position in which said upper part is located close to said lower part and said mandrel is introduced into the well tubing and passes through an area of said well tubing provided with the valve, so that when the high pressure fluid is introduced through the mandrel it can not affect the valve, said upper part having a port communicating said inner passage of said upper part with an outer side of said upper part, so that a pressure can be equalized through said port of said upper part, said port of said upper part being provided with a valve adapted to close said port and to open said port correspondingly.