Some of the dull characteristics listed In Our Bit Dull Grading Guide are self-explanatory. More detailed description of the two-letter codes can be obtained from bit companies. Examples of some of the dull characteristics for Roller Cone Bit Design are shown below. BROKEN CONE (BC) – Roller Cone Bit Dull Characteristics The broken cone in …
Bi Center Bit
A hydraulic Jar is one of the drilling jar types used in drilling operations to free stuck pipe problems. This article will introduce the hydraulic drilling jar operation and mechanism. We also recommend visiting Drilling Jar Placement, Types, and Calculations. Operation & working principle article Hydraulic Drilling Jar Mechanism The tripping (check also: Tripping pipe …
In General, the Bending Strength ratio BSR is the ratio of the relative stiffness of the box to the pin for a given connection. The predominant consideration, especially in selecting larger Bottom Hole Assembly BHA connections, is (BSR). In Drill String Design, If we select a connection with either a pin or box that is out of …
The main application of balanced Cement plugs is to secure a well and cure mud losses, prior to a side track or in the course of Well Abandonment. The spotting of the plugs inside the casing (Check our guide for Casing Design Calculations Steps) or in the open hole will be through drill pipe with …
In this type of remedial cementing job procedure (Cementing in drilling), we are forcing the slurry through openings in the casing or casing liner (One of Types Of Casing). In this article, we will discuss in detail the remedial squeeze cementing job techniques as hesitation, bradenhead squeeze, design & cement retainer procedure. We will also …
A conventional rotary drilling assembly is typically used when drilling a vertical well, or a deviated well’s vertical or tangent sections. When using an RSS Rotary Steerable Assembly or Non-Rotating Steerable Mud Motor Assembly in a deviated well, it is, of course, possible to drill the tangent sections of the well with the steering action. …
In the upcoming paragraphs, we shall handle the most important factors to consider while Cementing designing, and performing successful Primary Cementing Casing operations jobs while drilling oil & gas wells (Cementing in drilling). Cement Formulation And Mud Conditioning To achieve a successful displacement, channeling of the cement in the annulus should be avoided which can …
Wellbore strengthening can be achieved by utilizing stress cage pill theory through drilling mud types in the wellbore using bridging particles (marble and graphite) and an ultra-low fluid loss mud system. This theory is considered as a solution for the Lost Circulation Problem. Wellbore strengthening is designed to strengthen the wellbore so that depleted reservoirs …
A cross-link is a chemical bond that joins two separate polymer chains together. When this happens, the free movement of individual polymer chains is restricted. The fluidity of the polymer chains reduces as the degree (density) of cross-linking increases, and this will affect the physical properties of the drilling fluid. In the drilling oilfield, cross-linking …
