Flying valve and well production method

Details Flying valve and well production method Flying valve and well production method

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 47/12 (2006.01) E21B 34/16 (2006.01) E21B 43/12 (2006.01) F04B 47/04 (2006.01)

Patent

CA 2483058

This invention relates to oil and gas production and can be used for lifting liquid from a well by gas energy. A flying valve comprises a tubular body, a detachable element as a body of rotation and stoppers of its entry into said tubular body, with said detachable element or said tubular body or both of them being made of lubricant-resistant elastic material. Said detachable element of the flying valve can be of spherical, tear-shaped or ellipsoid form and additionally can gave three or more flat stabilizers uniformly distributed at the periphery. Drain ports can be made in the body wall and located on a part of its height at a level not coinciding with said stoppers, or said body wall can be made as a sylphone at the same level. On the external surface of said body there can be annular grooves with our without ring straps being placed in said annular grooves. Straps with longitudinal grooves can be placed on the external surface of said body along the entire perimeter, or said longitudinal grooves can be made directly on the external surface of said body. On the internal surface of said body circular inserts can be placed. Rotating contacts can be placed on external edges of said stabilizers of said detachable element. Plains of said stabilizers can be also inclined to an axis of said detachable element and their external edges can be provided with scrappers. A method of well operation comprises a periodical run of said flying valve under a liquid level in a well up to a lower shock absorber followed by its lifting together with a liquid column being above said flying object. Said body of said flying valve and said detachable element run separately with the run of said detachable element of said flying valve following by the run of its body or vice versa. In the first case the following relationship is to be kept: P se/S ds < P b/S bs 12 where P se is the weight of the detachable element, S ds is the area of diametral section of the detachable element, P b is the weight of the body and S bs is the sectional area of the body of the flying valve. In the second case the character between the right and left sides of the inequation changes into opposite: P se/S ds > P b/S bs If said detachable element is provided with stabilizers, then it's trip operation is carried out with said stabilizers being positioned downward.

L'invention appartient au domaine de production de gaz et de pétrole et peut s'utiliser pour faire sortir un liquide de puits au moyen de l'énergie du gaz. La "soupape volante" de l'invention comprend un corps tubulaire, un élément séparable se présentant comme un corps de rotation, des limitateurs limitant son entrée dans le corps, l'élément séparable ou le corps tubulaire (ou les deux) étant faits d'un matériau souple résistant à l'huile et au pétrole. Le procédé de l'invention consiste à abaisser systématiquement la soupape volante en dessous du niveau du liquide dans le puits jusqu'à l'amortisseur inférieur puis à la relever avec la colonne de liquide située en dessus de la soupape volante. L'abaissement du corps et de l'élément de soupape séparable se fait séparément. On peut d'abord abaisser le corps et l'élément de soupape séparable et abaisser ensuite son corps, ou faire cette opération dans l'ordre inverse.

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