Discussion on the Problem of Inhibiting Rock Cuttings Slurry to Stabilize Drilling Fluid Performance

Classification:

Industry dynamics

Release time:

2020-06-17

【Summary Description】 DTH drill pipe occupies a very important position in the drilling accessories. When the drilling rig is working, under the condition that the formation is relatively stable, the solid-free drilling fluid is used. As long as enough flocculant is added, the cuttings will easily settle on the ground and keep the drilling fluid stable.
DTH Drill PipeIt occupies a very important position in the drilling accessories. When the drilling rig is working, when the formation is relatively stable, the solid-free drilling fluid is used. As long as enough flocculant is added, the cuttings will easily settle on the ground and keep the drilling fluid stable.
However, for complex formations, due to the problem of borehole collapse, mud with a certain specific gravity, viscosity, water loss and salinity must be prepared before entering the collapse section, which is unfavorable to cuttings precipitation.
潜孔钻杆
① If the water loss cannot be reduced to zero, the rock debris will inevitably be hydrated, expanded and dispersed;
② If the specific gravity is large, the sinking speed of rock debris is slow;
③ When the viscosity is large, the sinking speed of rock cuttings is slow;
④ The network structure formed by the mud and the adsorption of rock debris by the water loss reducer affect the precipitation of rock debris on the ground. Therefore, the cuttings will inevitably make slurry, causing the mud weight, viscosity increase, to the drilling.DTH Drill PipeThe work has many adverse effects. Although some drilling teams are equipped with desilters, they cannot solve the problem fundamentally.
In recent years, some oilfields in China have used shale inhibitors such as positive glue, small cations and polymeric alcohols, which have achieved certain results, but they can only relatively reduce the pulping rate of cuttings, and the cost is very high.
If the best system is potassium ammonium-cationic polymer, although the cost is low, but can not completely inhibit the debris pulp, the specific gravity per hundred meters also increased by 0.01.
How to suppress the slurrying of rock cuttings at a lower cost, stabilize the performance of drilling fluid, and comprehensively improve the drilling efficiency is an urgent problem to be solved in the drilling industry.

Key words:

weilida drill