RU2185494C1 - Method of loose material delivery into well and device for method embodiment - Google Patents

Abstract

FIELD: oil and gas industry; applicable at intensification of fluid recovery by delivery of loose materials to formation or for separation of formations by said materials, for instance, in hydraulic fracturing of formation. SUBSTANCE: method includes loading of loose material into bailer and its unloading in well through removable cover which is held by balls locked by bushing internal surface. Bailer is lowered until stop by bushing in bottom of sump or into loose material. Bushing is moved, balls are released from locked position into bushing pockets. Freed cover is removed, and lifting of bailer is started. Simultaneously loose material is removed from bailer. After lifting of bailer to wellhead, cover is installed to initial position and locked by balls. After motion of bushing, loose material is filled into bailer and procedure of loose material delivery to well is repeated. Device for the method embodiment has bailer with removable cover located in its bottom part. Cover is locked by balls located in its sockets and held by internal surface of movable bushing which has, in its lower part, pockets for receiving the balls during forced motion of bushing for removal of freed cover. In this case, cover is locked in bushing by flexible tie-rod. Cover is removed without use of detonator. EFFECT: higher efficiency. 2 cl, 1 dwg

Description

 The invention relates to the oil and gas industry and can be used to intensify production by delivering bulk materials to the formation or separating the layers with these materials.

 There is a method of delivering bulk materials into a well, which consists in filling these materials at the wellhead and transporting them to the sump or reservoir zone under the influence of gravitational forces (S.M. Bashlyk, G.T. Zagibailo. Drilling wells. M .: Nedra, 1990, p. 355-356).

 The disadvantage of this method is the long transit time of bulk materials from the mouth to the sump or reservoir.

 This disadvantage is eliminated in another known method for the delivery of bulk materials into the well and the device for its implementation, adopted as a prototype (Puncture and explosive equipment. Handbook edited by L.Ya. Fridlyander. M .: Nedra, 1990, p. 129).

 In the prototype method, the bulk material is loaded into the choke and discharged into the well through a lid that is removed by a detonator.

 The prototype device contains the specified bellow with a removable lid on which the detonator is mounted.

 The disadvantages of the prototype are the consumption of detonators and the need for their installation after each descent and lifting of the baffle.

 The objective of the invention is to remedy these disadvantages.

 The technical result achieved by using the invention is the creation of such a method and device for the delivery of bulk materials in which a detonator is not required to open the lid.

 The specified technical result is achieved by the fact that in the method of delivering bulk materials into the well, including loading them into the choke and unloading in the well through a removable cover, according to the invention, the cover is held by balls fixed by the inner surface of the sleeve; the bailer is lowered to the stop of the sleeve in the bottom of the sump or in bulk material and, moving the sleeve, withdraw the balls from a fixed position into the pockets of the sleeve; remove the released lid and begin to raise the baffle, while removing bulk material; after lifting the baits at the mouth of the lid put in its original position and fix the balls by moving the sleeve; bulk material is poured into the bunker and the procedure for its delivery to the well is repeated.

 The specified technical result is also achieved by the fact that in the device for the delivery of bulk materials into the well, containing a baffle with a removable cover located in the bottom of the bobbin, according to the invention, the cover is fixed by balls located in its nests, held by the inner surface of the movable sleeve having pockets in the lower part to enter the balls during forced movement of the sleeve, while the cover is fixed to the sleeve by a flexible connection.

 The execution in the lid of the nests under the balls, and in the sleeve - the contact inner surface that holds the balls, and pockets in the lower part of the sleeve for the balls to enter when moving the sleeve allows, firstly, to hold the lid when transporting the bobbin with bulk materials to the discharge zone, and in secondly, open the lid and pour loose materials into the well while the movable sleeve stops in the sump or in bulk material. Fixing the cover to the sleeve allows you to use it repeatedly.

 The proposed device, which allows to implement the proposed method, is shown in the drawing, which shows: the choke 1, removable cover 2, located in the bottom of the chute 1; slots 3 in cover 2; balls 4 located in slots 3 and held by the inner surface 5 of the movable sleeve 6; pockets 7 in the lower part of the sleeve 6, designed to enter the balls 4 during the forced movement of the sleeve 6; flexible connection 8, fixing the cover 2 to the sleeve 6.

 The device operates as follows, implementing the proposed method.

 At the wellhead, a cover 2 is mounted on the balls 4, keeping them from falling out by the inner surface 5 of the movable sleeve 6. Bulk materials are poured into the chipper 1 and released into the well. When the sleeve 6 rests in the sump or previously delivered bulk material, it moves and the pockets 7 are located opposite the balls 4, ensuring their exit from the sockets 3. The cover 2 in this case is not fixed and, due to the weight of the bulk material, falls out of the bobbin, allowing the bulk material to exit well while moving the bobbin 1 up. Upon reaching the mouth, cover 2 is put in place, as it is held by flexible connection 8. Then all operations are repeated.

 The presence of a detonator in the bellow is not required.

Claims (2)

 1. The method of delivery of bulk material into the well, comprising loading the bulk material into the choke and unloading it in the well through a removable cover, characterized in that the cover is held by balls fixed to the inner surface of the sleeve, the choke is lowered to the stop of the sleeve in the bottom of the sump or in bulk material and by moving the sleeve, the balls are brought out of a fixed position into the pockets of the sleeve, the loose cover is removed and the bobbin is lifted, while bulk material is removed from it, after lifting the bobbin at the mouth vyat to its original position and fix the beads by moving the sleeve is filled bulk material in Bailer and procedures for its delivery into the well repeated.  2. A device for delivering bulk material into a well, comprising a bobbin with a removable cover located in the bottom of the bobbin, characterized in that the cover is fixed by balls located in its nests, held by the inner surface of the movable sleeve having pockets for entering balls in the bottom of it during forced movement of the sleeve to remove the released cover, while the cover is fixed to the sleeve by a flexible connection.