SU915881A1 - Device for purifying drilling mud from slime - Google Patents

Description

The invention relates to devices and methods for cleaning drilling fluid from drillable rock during geological exploration, oil, gas and gas condensate wells, and can be used in chemical, petrochemical and other industries.

A device for cleaning drilling mud from sludge, comprising a housing with a conical bottom, inclined accounts with a vibrator, input nodes of the initial solution and output of the separated phases [1}.

However, the known device is complicated in design and energy-intensive in operation.

It is also known a device for cleaning solutions, containing a housing with a conical bottom, the input nodes of the initial solution and the output of the separated phases (2].

The disadvantage of this device is the low quality of purification of the drilling fluid, especially if the latter has high structural and mechanical properties. In this case, the thixotropic structure formed in the drilling fluid prevents ⁵ sedimentation of sludge particles.

The purpose of the invention is to increase the efficiency of use of the device by destroying the structure of the solution and eliminating the formation of stagnant ⁰ zones.

This goal is achieved by the fact that in the device containing the housing with a conical bottom, the input nodes of the source fluid and the drain are separated ¹⁵ phases, the input node is made in the form of a flat-blown distributor located in the plane of transition of the housing to the bottom, while the housing is made with a narrowing up its walls are inclined by 10-20 ⁶ to the vertical.

In FIG. 1 shows the proposed device, a longitudinal section; in FIG. 2 and 3 are embodiments. 915881 4 flat-jet distributor of the initial solution.

The device comprises a housing 1 with inclined walls, a conical bottom 2, a nozzle 3 for removing sludge with a valve A, a mud distributor 5, represented by a self-rotating hydraulic device and installed in the plane of the housing’s transition to the bottom, an inlet pipe 6, fixed at an angle 7, a glass 8, suspended on cables, exhaust pipe 9 with a filter.

The device operates as follows.

The drilling fluid coming from the well and containing the sludge is pumped through the inlet pipe 6 to the distributor 5, which ensures the distribution of the fluid over the entire cross section of the casing. At the same time, the thixotropic structure of the drilling fluid is destroyed in the pump and in the distributor.

The size of the body (cross-sectional area) should be large enough to ensure an upward flow rate of the liquid less than the sedimentation rate of the particles of the sludge. The inclination of the walls of the housing prevents the formation of stagnant zones. In a uniformly distributed upstream mud with a destroyed structure having a low speed, sedimentation of particles of sludge occurs.

The cleaned drilling fluid through the outlet pipe 9 is taken by the pump and fed further into the circulation line. Sludge accumulating in two containers is periodically removed through a nozzle with a valve

Thus, in the implementation of effective cleaning of drilling fluid using the proposed device, it is possible to increase the mechanical drilling speed, increase penetration per bit, reduce the consumption of chemicals for drilling mud processing, and reduce wear on drilling equipment. The annual economic effect of applying the invention in one well is 1365 R.

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Claims (1)

Claim A device for cleaning drilling fluid from sludge, comprising a body with a conical bottom, input nodes of the initial solution and output of the separated phases, characterized in that, in order to increase the efficiency 25 of the use by destroying the structure of the solution and eliminating the formation of stagnant zones, the input unit of the initial solution is made in the form of a flat-jet distributor located in the plane of transition of the housing to the bottom, while the body is made narrowing upward and its walls are inclined by 10-20 ° to verticals.