跳至主要内容

Drilling Waste Separation by Solidification and Stabilization



Drilling waste separation from the mud at the shale shakers may be coated with so much mud that they are unsuitable for the drilling mud recycle or disposal step or are difficult to handle or transport. Constituents of the drilling cuttings or the mud coating them, like oil or metals, may leach from the drilling waste, making them unsuitable for land application or burial requirements. Kinds of materials can be added to drilling cuttings to solidify and stabilize them.

Solidification is a technology that encapsulate the drilling waste in a monolithic solid of high structural integrity. The encapsulation may be of fine drilling waste particles or of a large block or container of drilling cuttings.

Solidification does not necessarily involve a chemical interaction between the drilling waste separation and the solidifying reagents but may mechanically bind the drilling waste into the monolith. Contaminant migration is restricted by vastly decreasing the surface area exposed to leaching and/or by isolating the drilling waste within an impervious capsule.

Stabilization is the technology that reduce the hazard potential of drilling waste by converting the contaminants into their least soluble, mobile, or toxic form. The physical nature and handling characteristics of the drilling waste separation are not necessarily changed by stabilization.

Usually, cement, fly ash, lime, and calcium oxide have been used most frequently during solidification/stabilization additives for treating drill cuttings and other types of drilling solids. A recent study tested seven other types of additives for stabilizing drilling cuttings and assessing the performance of stabilized drilling cuttings as a substrate for growing wetlands plants.

Usually the additives include medium-ground mica-based material, fine-ground mica, three different commercial mixtures of recycled cellulose fibers, walnut nut plug, and pecan nut plug. Various other commercial products with proprietary compositions have been marketed.

While not all drilling waste separation are amenable to chemical fixation and stabilization treatments. Solidification/stabilization should be adapted for site-specific applications depending on the end-use of the treated material and the chemical characteristics of the drilling waste. Laboratory tests conducted to determine the proper blend of additives to achieve the desired material properties is recommended.
标签：

评论

发表评论

此博客中的热门博文

Mono Screw Pump Working Principle and Apllication

M ono screw pump , also called  sewage pump  or  progressive cavity pump ,  belongs to the rotor type positive displacement pump .   M ono screw pump  is depend ing  on the screw meshing with liner on the discharge and suction cavity to conveying liquid volume change.   It is a kind of method of pressurized screw pump, a main working parts by bushing has a double helix cavity (stator) and the stator cavity and its meshing singlehead screw screw (rotor).   When the input shaft through the universal joint drive making planets revolving around the center of the stator, rotor stator, rotor, vice is continuous mesh form sealed cavity, the seal chamber volume invariably uniform axial movement, the medium from the suction end of deputy to the stator, rotor pressure side, the suction medium sealed cavity through the stator without stirring and destruction. M ono screw pump  is an ideal pump used to feed drilling fluids to ...
发表评论
阅读全文

Drilling Waste Disposal-Pit Burial

The use of earthen or lined pits is integral to drilling waste management. During most China  drilling operations, the drilling cuttings separated by the shale shaker are sent to a pit called the reserve pit located near the drill rig. The pit is generally open to the atmosphere, so it also accumulates stormwater and washwater from the rig. The strategic location of small pits near drilling sites can also help minimize spillage of drilling waste. Unless site characteristics are such that no significant threat to water resources can occur, liners are generally required. Where pits must be constructed adjacent to water bodies or on sloping terrain, engineering precautions incorporated into the design will help to ensure pit integrity. Precautions should be taken to prevent disposal of chemicals, refuse, debris, or other materials not intended for pit disposal. At the end of the drilling job, any hydrocarbon products floating on top of the pits are recovered and any free...
发表评论
阅读全文