SU1641387A1 - Separator - Google Patents

Abstract

This invention relates to a technique for cleaning liquids from mechanical impurities, in particular for separating cuttings from drilling mud. The purpose of the invention is to reduce fluid loss when discharging sludge without stopping the separator by increasing the degree of sludge dewatering. The separator includes a housing 1 with an inlet 2 and outlet 3 and 4 nozzles. A sludge collector 7 with an opening bottom 9 is attached to the locking device 6. A piston 11 is placed inside the sludge collector 7, which divides the internal cavity of the sludge collector 7 into two closed cavities B and C connected to each other by a locking element 14. End plane A The piston 11 facing the bottom 9 is made with a bevel. 1 il.

Description

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The invention relates to a technique for the purification of liquids from mechanical impurities, in particular for the separation of drill cuttings from drilling mud.

The purpose of the invention is to reduce fluid losses during the discharge of sludge

The drawing shows a separator, a general view.

The separator includes a housing 1 with input 2 and output 3 and. 4 branch pipes. The inlet 2 is connected to the housing 1 and serves to supply the gas-liquid mixture from the well. The pipe 3 serves to remove the released gas from the housing 1. The liquid flows out of the housing 1 through the pipe 4. The precipitated sludge is removed from the separator through the drain pipe 5 to which the locking device 6 is attached. The latter is attached to the sludge trap 7 with the bottom of 8. which is locked to the latch 10. Inside the sludge collector 7 a piston 11 is placed, which with the help of a rod 12 and a drive (not shown) can make reciprocating movements along the axis of the sludge collector 7, the piston 11 from the side facing the bottom 9, execute sloping (surface A) to increase the degree of sludge dewatering and prevent solid particles from slug seizing during the forward movement of the piston 11. The latter divides the strip of the collecting box 7 into two closed cavities 5 and B (respectively, piston and piston), which are interconnected a hydraulic channel, for example, an external pipeline 13 with a locking element 14 installed on it. The locking element 14 is placed against the entrance of the pipeline 13 to the upper part of the cavity B. The cavity B of the sludge collectors 7 is from the side opposite The bottom plate E is equipped with an adjustable check valve 15 for communication with the atmosphere.

A piston 11 with a beveled end surface A is installed inside the sludge collector in such a way that its upper part has a minimum thickness and the lower part has a maximum thickness.

The separator is operated as follows.

During the operation, a mixture consisting of a fluid (drilling mud), cuttings, gas (formation fluid), etc. enters the separator from the well. A gas-liquid mixture phase separation device (not shown) separates the gas from the liquid phase. The released gas is removed through the upper outlet 3 to the azo-water line.

With this, the accumulation gradually accumulates in the lower part of the housing 1, from where it goes through the branch pipe 4 to the degasser or to the mechanical cleaning system. The settled sludge through the open locking device 6 on the drain pipe 5 enters with the liquid into the collection container 7, the piston 11 of which is in the initial position, i.e. at maximum distance from closed

0 bottoms 9. The locking element 14 on the pipeline 13 is open, Periodically (as far as | sludge is seen) the locking device 6 is closed, thus the compartment of the internal cavity of the separator body 1 from the sludge collector 7. direction to the closed bottom 9, while the sludge is scraped up with a gurshchem for 11 hours of cavity B, and the liquid flows through pipeline 13 from cavity B

0 from the floor of the cylinder B. At the end of the stroke of the piston 11, the slurry begins to condense between the closed bottom 9 and the beveled end surface L of the piston 11. At the same time, due to the wedge effect, the degree of dewatering of the slime increases and the likelihood of jamming of solid slurry particles between the piston 11 and the bottom 9 during the movement of the piston 11. When the sludge is compacted, the remaining liquid is displaced by the piston 11 into the pipeline

0 13, after which it overlaps with the locking element 14. Open the latch 10. , the bottom 9 swings out the ns hinge 8 and the compacted sludge is discharged from the sludge collector 1 - $ A further by the reciprocating movement of the piston 11. If at the same time the discharge occurs in the cavity B, then comes to her.

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After unloading the sludge, the piston 11 starts reverse flow (the bottom 9 is pre-closed). The piston 11 moves when the AND element is opened with the locking device. The fluid from the cavity B again flows into the cavity B. The device 6 is opened, together with the cavity of the separator body 1 and the sludge collector 7. The process of accumulating sludge in the sludge collector 7 is resumed.

The use of the invention allows to reduce fluid losses, including

Claims (1)

5 of the drilling fluid in the process of unloading sludge from the separator during its operation Claims of the invention Separator, comprising a housing with inlet and outlet nozzles, a sludge collector with a tilting bottom and a piston. installed in it with the formation of a polo element connecting the cavity with the possibility of a reciprocating sludge collector, with the separator moving along the longitudinal axis connected to the sludge collector or in the sludge collector, which differs in the nozzle with a locking device, and that, in order to reduce fluid losses, the end face of the piston facing when unloading sludge, sludge collector to the folding bottom of the sludge collector, it is provided with a pipeline with a shut-off pipe with a bevel.