Mud Gas Separator

Computational fluid dynamics (CFD) is a computer-based method to analyze fluid mechanics. CFD is a finite element type of solution that solves fundamental equations of fluid flow numerically within an analysis domain. Our specialist has analyzed various aspects of fluid flow ad its behaviors, resulting in an in-depth understanding of the underlying fluid and gas mechanics. Based on suggested improvements Kapwell has improved existing MGS design. We have applied same technology for several major issues in the MGS operation such as cavitation in pipe bends etc .

Stringent materials requirements for the sour service for the Mud Gas Separator (Poorboy Degasser) means that potential sulfide stress cracking (SSC) may cause an MGS to leak or a catastrophic (shrapnel-type) failure. It is necessary to ensure that rigorous materials and corrosion engineering practices are followed. H2S Sour environments require materials classes DD, EE, FF, or HH, and these materials classes are used to specify materials to meet the requirements of NACE MR-0175 for the Mud Gas Separator. Kapwell takes great care in the design, materials selection, and quality control of equipment used in the sour service. The safety aspect is always a prime consideration. Kapwell do not use or recommend the following material when manufacturing MGS for Sour Service Low- and medium-alloy steels containing more than approximately 1 percent nickel. Free machining materials containing more than 0.08 percent sulfur. Cold-finished low- and medium-alloy steels, cold-finish...

According to a report from Oil & Gas UK, a trade group. Drilling operation has dropped to 40 year low both last year and in 2016 as companies cut spending to cope with falling oil prices. Low drilling operation activities of onshore oil & gas has led to decline production of onshore oil & gas reserves, sudden change in high oil prices expected to bring high level of drilling activity. Safer and controlled drilling activity will be the key to the success drilling companies. The increasing use of Managed pressure drilling (MPD) has been proven to enhance drilling operations in conventional, narrow margin, high pressure high temperature (HPHT) and, in particular, deepwater operations. Its success does not come easily, as the technique challenges the conventional drilling paradigm along with drilling contractors and operators’ policies and standards. Success of MPD operation not reply on the technics, personell skills but also what equipment used and how it is used. For MPD ope...

Traditional MGS design shows small and short mid long mud seal (3-4 ft) and google search shows that many supplier sell equipment not knowing sizing requirement for the mud seal height. MGS Mud seal is used to maintain the internal pressure of Mud Gas Separator (MGS). The parameters used to estimate the internal pressure of MGS are simulated through the gas kick and Geometry of MGS. For example, if the MGS geometry is identical and it is except the gas diameter then the vent line will be increased by 5cm. Well Control Incident Learning from IOGP (International Association of Oil and Gas producers) Alert #16-1, shows that while MPD operation high-pressure gas and condensate exploration well, drilling in the reservoir section below 16500, the mud seal of the MGS was lost while crew was bleeding off some of the gas through the choke and mud-gas separator (MGS). The reservoir pressure was only about 375 psi below the MPD set point. Small influxes occurred when the pumps were not circulatin...

For the well-controlled drilling operation, design of the MGS with constraint parameters and safety factors are important. To achieve the objective, the design theory and the design model is provided in the evaluation section under white paper prepared by Kapwell, the limitations of the existing gas handling process are examined in the design and theory section. In order to avoid recirculating gas cut mud, minimise the volume of mud lost from the active system, and safely vent gas during well control operations a properly designed mud gas separator is mandatory. Atmospheric open bottom separators are the predominant type of separator in use onshore. Kapwell white paper presented recommendations and procedures for separator and vent line sizing. The design procedure can be used by contractors when fabricating new equipment or by operators for evaluating existing equipment. Additionally, fabrication, materials, installation, and maintenance standards are recommended for separator equipme...

Kapwell offers two types of MGS: atmospheric and pressurised. The atmospheric type separator is standard equipment on virtually all rigs and is referred to in the field as a “gas buster” or “poor boy” separator. The main advantage of this type of separator is its operational simplicity which does not utilise control valves on either the gas or mud discharge lines. A pressurised MGS is designed to operate with moderate backpressure, generally 50 psi or less. Pressurised separators are used to overcome line pressure losses when an excessive length of vent line is required to safely flare and burn the hazardous gas an extended distance from the rig. The pressurised separator is considered special rig equipment. The Mud Gas Separator (Poorboy Degasser) forms part of the well control system and plays a critical part in ensuring the safe operation of the rig. The Mud Gas Separator (Poorboy Degasser) is located on or in the vicinity of the drill floor, downstream of the buffer block on the ch...