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US 4,072,166 AGranted
Valve apparatus for deep drilling
AssigneeNone recorded
InventorsWladimir Tiraspolsky, Roger F. Rouviere
Life of this patent
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AssigneeNone recorded
InventorsWladimir Tiraspolsky, Roger F. Rouviere
Estimating the term…
A valve apparatus adapted for connection in a drill stem comprises a sleeve member slidably guided in a body having a longitudinal fluid passage and lateral openings that communicate with an annular space surrounding the sleeve member. The sleeve member also comprises lateral holes of small diameter and bottom orifices or channels of large diameter. In a first position of the sleeve member, the fluid flows from the drill stem towards the annular space through the holes of small diameter. When the rate of flow reaches a sufficient value, the sleeve member is moved against a biasing spring to a second position, where the small holes are closed and the large channels permit the passage of the fluid through the valve, towards the lower part of the drill stem, without any noticeable pressure drop. The sleeve member is retained in the said second position through the pressures in the drill stem and in the annular space acting on different areas of the sleeve member. When the pressure in the annular space suddenly increases, the sleeve member is moved to a third position wherein any communication between the drill stem and the annular space is avoided.
A valve apparatus adapted for connection in a drill stem comprising a body having a longitudinal fluid passage and lateral openings communicating said longitudinal passage with the exterior of said body;
A valve apparatus adapted for connection in a drill stem comprising a body having a longitudinal fluid passage and lateral openings communicating said longitudinal passage with the exterior of said body;
A valve apparatus adapted to be connected in a drill stem, comprising a casing, means provided on said casing for connecting said valve apparatus to the drill stem, a sleeve member movable between a first position wherein the inner passage of the drill stem is in communication with the annular space of the bore hole, and a second position wherein said communication is blocked, spring means biasing said sleeve member towards said first position, said sleeve member having the shape of a deep dish comprising a base and a side wall, holes of small diameter provided in said side wall, near said base, passages of large diameter provided in said base, a communication chamber arranged between said sleeve and said valve casing and communicating with said annular space, said small holes communicating between the interior of the sleeve member and said communication chamber in said first position, said spring means being located within said communication chamber, valve means connected to said sleeve member for preventing flow of said fluid through said passages of large diameter when said sleeve member is in said first position, sealing means in contact with said sleeve member for preventing said communication between the inner passage of the drill stem and said annular space of the bore hole when said sleeve member is in said second position, and pressure reactive surfaces provided on said sleeve, said surfaces being directed upwardly and downwardly respectively and being exposed to the inner part of said drill stem and to said communication chamber respectively.
Dependencies are inferred from the claim text.
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Valve arrangements in drilling-fluid circulation systems: down-hole by-pass valve arrangements, i.e. between the inside of the drill string and…
Spring-loaded: with more than one spring
With separate connected fluid reactor surface: valve closes in responses to reverse flow
Earth or rock drilling
Term ended 7 Feb 1995 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
This invention relates, generally, to the technique of deep drilling of the ground.
This technique sometimes requires the use of devices ensuring the axial flow of circulation fluid injected into the drill stem, yet interrupting this axial continuity and connecting the interior of the stem directly with the exterior annular space when injection is broken off or when the flow descends below a certain minimum value.
This is the case, for instance, with release valves which are installed at a certain distance from the destruction tool, to ensure the filling or emptying of the stem while running in or out of the hole or where there are obstacles to the free circulation of the fluid through devices such as an underground motor and in particular a volumetric motor or a tool creating a high pressure loss.
On the drawings:
FIG. 1 is a cross sectionnal view of a valve according to the invention, in resting position, that is in the absence of maintained injection in the shaft.
FIG. 2 represents a half sectionnal view of the active part of the valve during an injection.
Looking at FIG. 1, the reference 1 indicates the casing of the valve, the ends of which are provided with the usual threads 2, 3 for linking with the drill stem. It will be seen that this casing 1 is tubular in shape and is crossed by an axial bore indicated as a whole by the reference 4 and having sections of different diameter whose role will be described in more detail later.
A part of the wall of the casing 1 has an annular strainer 5 of wide dimension in order to reduce the risks of clogging. This strainer connects the annular external section with a small chamber 6 which itself communicates with the interior of the casing 1 via passages 7.
The sliding apparatus of the valve consists of a sleeve 8, the head 9 of which is sealed in relation to the bore 4 of the casing 1 by a sliding seal ring 10, thus forming an annular chamber 11 in which is located a spring 12 resting upon a ring 13 which itself rests on a base plate 14. The latter has, on its side facing the wall of the bore 4 of the casing 1 a stationary seal ring 15 and on the side facing the sleeve 8, two sliding seals 16 and 17.