How to Choose the Right Oilfield Solids Control Equipment Package

A solids control package can look right on the quotation and still misbehave on the rig. The shaker may struggle with the actual mud load, the pump may not deliver the required conditions at the hydrocyclone inlet, or the skid may not fit the available space. A low-priced offer can also leave out items needed to complete the installation.

For drilling contractors and oilfield service companies, the challenge is to look beyond individual equipment ratings and the quoted price. The package needs to match the drilling conditions, include the agreed supply scope, and fit the site. Four areas deserve attention before an order is placed.

Give the Supplier Enough Information to Size the Package

If you do not provide a flow rate, each supplier may choose a different basis for sizing the package. Two quotations can look comparable while being based on different mud properties, solids loading, or installation conditions. The resulting price difference may have little to do with the actual value of the equipment.

For a new project, provide the expected mud flow rate, drilling fluid type, anticipated solids loading, available installation space, and power supply. For an existing rig or a system upgrade, include details of the equipment that will remain in service. Existing equipment models, connection dimensions, and layout drawings are particularly useful.

Some operating data may still be estimates at the enquiry stage. That is normal. Ask each supplier to state the flow rate, mud weight, and solids loading used for sizing. With the design basis written into the quotation, you can identify differences before treating the equipment list and price as final.

Check That the Equipment Stages Match

Individual units can meet their rated specifications without the complete system delivering the required performance. The issue is often a mismatch between stages, rather than a problem with one machine alone.

Take the shale shaker. Its rated capacity is only part of the picture. Mud properties, solids loading, and screen condition all affect how much returning mud it can process in practice. If the shaker cannot process the returning mud at the required rate, larger desanders downstream will not solve the bottleneck.

Desanders and desilters need suitable hydrocyclone feed flow and inlet pressure. The pump must operate at a point on its pump curve that meets the required flow and pressure under actual system conditions. The pump's shutoff head is the head it develops at zero flow. Under operating conditions, the available head depends on the pump curve and system resistance, including pipe friction, valves, elevation changes, and flow rate. Check the expected operating point and the pressure available at the hydrocyclone manifold.

Read the proposal as one system: the shaker, hydrocyclones, feed pumps, and the mud transfer routing between tanks. Ask the supplier to explain the basis for the main capacity and pump selections, especially where the design relies on estimated mud properties or solids loading.

Compare the Actual Supply Scope, Not Just the Price

A cheaper quote may simply include less. One supplier may price the valves, piping, electrical components, and support steel needed for the agreed arrangement, while another lists only the main units. The difference becomes an extra cost when those missing items have to be sourced separately.

Compare the equipment models and quantities, pump specifications, tank arrangement, and included accessories. Read the exclusions as carefully as the equipment list. Items assigned to the buyer mean extra purchasing, fabrication, and coordination before the package is ready for installation.

Make sure each supplier is quoting against the same operating requirements. If the proposed flow rate, treatment duty, or package configuration differs, the price comparison is not like for like.

Check whether the quoted price includes the specified explosion-proof electrical equipment and required hazardous-area certification. If these items are excluded, confirm who will supply them. Also establish who is responsible for installation work, site modifications, and other supporting items. Resolving these differences before ordering gives you a clearer view of the actual supply cost.

Check the Layout Before Manufacturing

A package can be technically suitable and still require changes if its dimensions or connections do not match the installation. This is a particular concern when adding equipment to an existing rig, where space and pipework may already be constrained.

Compare the skid dimensions and equipment arrangement against the site drawings. Check inlet and outlet positions, connection sizes, flange standards, and pipe routes. Make sure operators can reach the screens, pumps, and valves for routine maintenance after installation.

For a rig upgrade, pay close attention to the interfaces with equipment that will remain in service. An inlet or outlet connection in the wrong position, or a pipe route that cannot be built as drawn, may require cutting, welding, and other site modifications after delivery. These issues are easier to resolve before the package is manufactured.

Confirm that the site power supply matches the equipment's voltage and frequency requirements. Where applicable, check that the equipment design is suitable for the site's hazardous-area Zone classification. Resolve any discrepancies before manufacturing begins.

Before Approving the Package

Use these questions for your final technical review before order approval:

• Is the system sized for the expected mud flow rate, mud type, and solids content?

• Can the pumps deliver the flow rate and pressure required by the hydrocyclones?

• Does the quotation clearly show what equipment and accessories are included, what is excluded, and what the customer needs to supply?

• Will the skid fit the available space, and do the connections and piping match the site layout?

• Do the electrical specifications match the site's power supply and hazardous-area classification?

If any of these points is still uncertain, resolve it with the supplier before approving the final configuration.

TR Solids Control manufactures oilfield solids control equipment and complete systems for drilling applications. Send us your project requirements and available layout drawings to review the proposed configuration, supply scope, and site connections before manufacturing begins.