Each production batch of Drilling Starch HT Grade is tested for filtrate volume after hot rolling at 140°C for 16 hours before release — not just at ambient conditions. Buyers can request the batch-specific Certificate of Analysis (COA) showing this post-hot-rolling result, which matters when qualifying a filtration control additive for wells with elevated circulating temperature.
Unionchem has supplied natural hydrocolloids and modified starch derivatives to export markets since 2010, operating ISO 9001:2015 certified production in Shandong, China. Drilling Starch HT Grade ships through the same established export documentation and logistics chain as the company's broader drilling fluid additive line.
Drilling Starch HT Grade (CAS # 9005-25-8) is a modified starch processed specifically to maintain filtration control performance under high brine, high pressure, and high temperature conditions. It produces a strong, smooth filter cake to reduce filtration loss and protect the well wall in HPHT drilling fluid systems.
The filtrate volume specification for HT Grade is tested and rated after hot rolling at 140°C for 16 hours, simulating sustained downhole thermal exposure. Standard Drilling Starch API Grade is not qualified against this post-hot-rolling condition — buyers should specify HT Grade when the target well has elevated bottomhole circulating temperature.
Parameter | Specification |
Suspension properties — Viscometer dial reading at 600 r/min in 40 g/L salt water | Max. 18 |
Viscometer dial reading at 600 r/min in saturated salt water | Max. 20 |
Filtrate volume in 40 g/L salt water, after hot rolling at 140°C/16 hours (mL) | Max. 10 |
Filtrate volume in saturated salt water, after hot rolling at 140°C/16 hours (mL) | Max. 10 |
Particle size | Min. 90% pass through 60 mesh (250 micron) |
CAS Number | 9005-25-8 |
Standard compliance | API 13A / ISO 13500 |
Certification | ISO 9001:2015 |
Request the batch-specific COA to confirm these results for the lot assigned to your order.
Pricing is quoted per metric ton on FOB Qingdao or CIF destination-port terms, and varies with order volume, packaging specification, and current raw material cost. Contact Unionchem with your target order volume, destination port, and well temperature requirement to receive a formal quotation.
25 kg net multiply paper bags, shrinkwrapped on pallets (standard export packaging)
Custom packaging and labeling available for qualified order volumes — specify requirements when requesting a quote
Unionchem provides free samples of Drilling Starch HT Grade for qualification testing, including hot rolling verification, before bulk order. Confirm current sample and bulk production lead times when submitting your inquiry, as they depend on production scheduling at the time of order.
Standard export documentation includes Certificate of Analysis (COA) with post-hot-rolling test results, Material Safety Data Sheet (MSDS), and packing list. Unionchem ships from Qingdao port under FOB, CIF, or other Incoterms as agreed at quotation. Confirm any additional documentation requirements (e.g., Certificate of Origin, fumigation certificate for wood pallets) at the inquiry stage.
Q1: What is the minimum order quantity (MOQ) for Drilling Starch HT Grade?
A1: MOQ depends on packaging format and destination. Contact Unionchem with your target volume and destination port for a specific MOQ and price quotation.
Q2: Can I request a batch test report showing the hot rolling results?
A2: Yes. Unionchem provides a Certificate of Analysis (COA) for each batch, including filtrate volume results after hot rolling at 140°C for 16 hours.
Q3: How is Drilling Starch HT Grade different from Drilling Starch API Grade, and which one do I need?
A3: HT Grade is qualified after 140°C/16-hour hot rolling for wells with elevated circulating temperature; standard API Grade is not tested against this condition. Share your well temperature and salinity conditions with the sales team to confirm the right grade.
Q4: Can I get a free sample before placing a bulk order?
A4: Yes. Submit an inquiry with your shipping address and well conditions to request a free sample for qualification testing.
Q5: What are the payment terms for bulk orders?
A5: Payment terms are confirmed at the quotation stage and typically follow standard international trade terms (e.g., T/T deposit with balance before shipment, or L/C for qualified orders).
Q6: What Incoterms do you support?
A6: Unionchem quotes on FOB Qingdao or CIF destination port as standard, with other Incoterms available depending on order volume and destination.
Q7: How is Drilling Starch HT Grade packaged and shipped for export?
A7: Standard export packaging is 25 kg net multiply paper bags, shrinkwrapped on pallets, shipped from Qingdao port with COA, MSDS, and packing list included.
Tell Unionchem your target order volume, destination port, and well temperature/salinity conditions to receive a formal FOB/CIF quotation and free sample.
Request a free sample: sales@unionchem.com.cn
Get a bulk quote: Contact Form
Talk to sales directly: WhatsApp/WeChat +86-13953383796