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EP-4741033-A2 - DRILLING FLUID DILUTION SYSTEM

EP4741033A2EP 4741033 A2EP4741033 A2EP 4741033A2EP-4741033-A2

Abstract

A method can include receiving a target density value for a drilling fluid exiting a sedimentation device; receiving a measured density value for the drilling fluid directed to the sedimentation device, a measured density value for the drilling fluid exiting the sedimentation device, and an incoming flow rate value for the drilling fluid directed to the sedimentation device; and generating control instructions for control of an injection pump to regulate a diluent injection pump rate to dilute the drilling fluid entering the sedimentation device to achieve the target density value.

Inventors

  • JOLING, MICHAEL

Assignees

  • Services Pétroliers Schlumberger
  • Schlumberger Technology B.V.

Dates

Publication Date
20260513
Application Date
20221020

Claims (13)

  1. A method, comprising: receiving a target density value for a drilling fluid exiting a sedimentation device; receiving a first measured density value for the drilling fluid directed to the sedimentation device, a second measured density value for the drilling fluid exiting the sedimentation device, and an incoming flow rate value for the drilling fluid directed to the sedimentation device; generating a model for control of an injection pump to regulate an injection pump rate to dilute, or apply a chemical treatment to, the drilling fluid entering the sedimentation device to achieve the target density value, the model depending on, or using as inputs, the first measured density value, the second measured density value, and the incoming flow rate value; and generating control instructions for control of the injection pump to regulate the diluent injection pump rate to dilute, or apply the chemical treatment to, the drilling fluid entering the sedimentation device to achieve the target density value based on the generated model.
  2. The method of claim 1, further comprising: receiving a first measured viscosity value of the drilling fluid prior to the sedimentation device; and receiving a second measured viscosity value of the drilling fluid exiting the sedimentation device, wherein the model further depends on, or uses as further inputs, the first measured viscosity value and the second measured viscosity value.
  3. The method of claim 1 or 2, wherein the injection pump rate is, or comprises, a diluent injection pump rate.
  4. The method of claim 1, 2 or 3, wherein: the drilling fluid comprises oil; and the diluent injection pump rate specifies an oil injection pump rate for injection of oil as a diluent into the drilling fluid.
  5. The method of any preceding claim, wherein the model is based on a Stokes Law calculation using two or more of: the first measured density value, the second measured density value, the incoming flow rate value, the first measured viscosity value, or the second measured viscosity value.
  6. The method of claim 5, wherein the model determines a Reynolds number based on the Stokes Law calculation for the drilling fluid using two or more of: the first measured density value, the second measured density value, the incoming flow rate value, the first measured viscosity value, or the second measured viscosity value.
  7. The method of any preceding claim, wherein: the sedimentation device causes sedimentation of solids in the drilling fluid; and at least a portion of the solids are from drilling a borehole in a formation.
  8. The method of any preceding claim, further comprising, based on the generated control instructions for control of the injection pump, regulating the diluent injection pump rate to dilute the drilling fluid entering the sedimentation device to achieve the target density value.
  9. The method of any preceding claim, wherein the diluent injection pump rate causes dilution of the drilling fluid to increase a sedimentation rate of solids in the drilling fluid by the sedimentation device.
  10. The method of claim 9, wherein the dilution of the drilling fluid reduces at least one of: a density of the drilling fluid entering the sedimentation device or a viscosity of the drilling fluid entering the sedimentation device.
  11. The method of any preceding claim, wherein the chemical treatment comprises dilution of the drilling fluid entering the sedimentation device.
  12. A system, comprising: one or more processors; a memory accessible by the one or more processors; and processor-executable instructions stored in the memory and executable to instruct the system to perform a method according to any preceding claim.
  13. The system of claim 12, wherein the system further comprises one or more of: a mechanical device, a measurement device, or a control device.

Description

RELATED APPLICATION This application claims priority to and the benefit of a US Provisional Application having Serial No. 63/257,641, filed 20 October 2021, which is incorporated by reference herein. BACKGROUND The maintenance of drilling fluids has historically been separated into two functions: chemical treatment, or solids control. Both seek the same end, to achieve the desired flow properties, or rheology, as dictated by the known best practices for the lithographic target. Unfortunately, the two disciplines are often so siloed that while they are two tools in the same bag, they are deployed as separate entities. In the worst scenarios, the plans of one entity will correlate directly to efficiency loss for the other. SUMMARY A method can include receiving a target density value for a drilling fluid exiting a sedimentation device; receiving a measured density value for the drilling fluid directed to the sedimentation device, a measured density value for the drilling fluid exiting the sedimentation device, and an incoming flow rate value for the drilling fluid directed to the sedimentation device; and generating control instructions for control of an injection pump to regulate a diluent injection pump rate to dilute the drilling fluid entering the sedimentation device to achieve the target density value. A system can include a processor; memory accessible by the processor; processor-executable instructions stored in the memory and executable to instruct the system to: receive a target density value for a drilling fluid exiting a sedimentation device; receive a measured density value for the drilling fluid directed to the sedimentation device, a measured density value for the drilling fluid exiting the sedimentation device, and an incoming flow rate value for the drilling fluid directed to the sedimentation device; and generate control instructions for control of an injection pump to regulate a diluent injection pump rate to dilute the drilling fluid entering the sedimentation device to achieve the target density value. One or more computer-readable storage media can include processor-executable instructions to instruct a computing system to: receive a target density value for a drilling fluid exiting a sedimentation device; receive a measured density value for the drilling fluid directed to the sedimentation device, a measured density value for the drilling fluid exiting the sedimentation device, and an incoming flow rate value for the drilling fluid directed to the sedimentation device; and generate control instructions for control of an injection pump to regulate a diluent injection pump rate to dilute the drilling fluid entering the sedimentation device to achieve the target density value. A system can include a controller that includes: one or more interfaces for receipt of a measured density value for drilling fluid directed to a sedimentation device, a measured density value for the drilling fluid exiting the sedimentation device, and an incoming flow rate value for the drilling fluid directed to the sedimentation device and for transmission of a control signal to an injection pump for pumping diluent into the drilling fluid before the sedimentation device; and control circuitry for generation of the control signal based at least in part on one or more of the measured density values and the incoming flow rate value. In such an example, the control circuitry can include a processor and memory accessible to the processor to execute instructions to generate the control signal. A skid-mounted system can include fluid meters; a diluent injection pump; and a controller that includes control circuitry for generation of a control signal for the diluent injection pump based at least in part on one or more outputs of the fluid meters for dilution of drilling fluid. Various other apparatuses, systems, methods, etc., are also disclosed. This summary is provided to introduce a selection of concepts that are further described below in the detailed description. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used as an aid in limiting the scope of the claimed subject matter. BRIEF DESCRIPTION OF THE DRAWINGS Features and advantages of the described implementations can be more readily understood by reference to the following description taken in conjunction with the accompanying drawings. Fig. 1 illustrates examples of equipment in a geologic environment;Fig. 2 illustrates examples of equipment and examples of hole types;Fig. 3 illustrates an example of a system;Fig. 4 illustrates an example of a table;Fig. 5 illustrates an example of a system;Fig. 6 illustrates an example of a system;Fig. 7 illustrates an example of a system;Fig. 8 illustrates an example of a system;Fig. 9 illustrates examples of plots;Fig. 10 illustrates examples of plots;Fig. 11 illustrates an example of a plot;Fig. 12 illustrates an example of a plot;Fig. 13 illustrates