Scientific drilling is in accordance with step by step, each step has each step of the step and intention, we should establish a drilling plan in advance so that when drilling problems can be better solved, the following small makeup, for now, what are the steps of scientific drilling? I hope I can help you.

1. Lower the tube sleeve

Casing design is the most important part of drilling. Any well will encounter several different geological, depth, or emergent conditions, production, and development requirements during the drilling process, so several layers of casing are needed to protect the good hole to successfully drill the target drilling.

The drill hole is drilled to a certain depth or level by the hole well, the next layer of pipe sleeve, and then drilled with a smaller size bit. Take Well 141 out of mine as an example. In the first stage, after drilling to 1-500 meters with a 171/2" drill bit, the 133/8" surface pipe sleeve is lowered first, and only a 121/4" drill bit can be used to drill.

2. Tripping and tripping

In order to replace a dull bit, prepare core samples, repair equipment, or do other work in the well, the drill bit and the drill bit should be raised to the surface, the old dull bit should be removed, the new selected bit should be connected, and the original bottom hole should be drilled in the reverse order.

The deeper the drilling, THE more time-consuming the trip, and the real drilling time is relatively reduced, so how to choose a good bit, in order to increase the progress of drilling, reduce the number of trips, and shorten the construction period, is also the responsibility of engineers.

3. Mud and drilling

Rotary drilling is characterized by the use of mud as a circulating fluid in the well. The earliest fluid used in drilling is "water". As far back as ancient Egypt, when the Egyptians manually rotated a drill bit in the quarry to drill a hole at a depth of 20 feet, they would use water to remove cuttings. During the Zhou Dynasty, when salt Wells were drilled in Sichuan, water was used to remove cuttings.

Water, so to speak, is an early "mud" used for drilling. Until now, water has been the main component of mud. Especially in low specific gravity mud, water makes up more than 85 percent of the total composition.

With the development of the oil well drilling industry, the drilling is getting deeper and deeper. In addition to its still important role in removing cuttings, the mud must perform a variety of other functions in order to drill deep and difficult Wells.

Mud can not only clear the hole, cool the drill bit, circulate out the broken cuttings and improve the drilling rate, but also form a mud wall in the inner wall of the hole to temporarily protect the hole so that it is not easy to collapse.

Adding barite powder to the mud can increase the specific gravity of the mud to resist the pressure of the formation to prevent collapse and prevent the formation fluid from invading the good hole. In case of a leakage layer, can also be added in the mud plugging material, in order to stabilize the hole; The viscosity of mud can be suspended by floating drill cuttings so that the hole is not buried, so the mud has many functions.

The IMPORTANCE OF MUD TO DRILLING, JUST LIKE BLOOD TO the HUMAN BODY, WILL DIRECTLY AFFECT THE success OR failure OF drilling engineering, SO how to strike a balance between the properties OF MUD and choosing the appropriate MUD is a big test for the site leader and mud personnel of the engineering team.

Cangzhou shenlong pipe manufacturing co., ltd. is a company specializing in the production of steel pipes and pipe fittings. The Wells we produce include seamless steel pipes, straight seam steel pipes, spiral steel pipes, etc., with uniform wall thickness, good perpendicularity, and high tensile strength. The products meet the standards of AWWA, ASTM, API, etc., which are used by a large number of drilling companies and are well received by customers.