Drill collar up to nearly the number of drill collars manufacturers branches of production planning support, import and export of products up to 719, of which nearly 300 HWDP products in addition to conventional spiral heavy weight drill pipe also increase the drill pipe, drill collar large size contracts with nearly 200 Products involved in 34 varieties, tube specifications ranging from 127-255.
 In the production process, there are more than 290 branch collars on quality products with special requirements. Qualified tensile strength, impact strength required to achieve a minimum of 80 and 85 joules, -20 ℃ low temperature impact work to ensure that more than 30 joules. Technical requirements relate ZT-JT5, NS-1 standard, the product performance requirements, but also meet the requirements of full supervision. This is the drill collar branch this year received the largest number of high-performance products, contracts, and this month is engaged full production tasks to complete difficult.
 In order to meet the technical requirements to ensure smooth delivery of goods according to the contract period, collars branch accurate to determine the time each process node, and strict checking of the production node completion last week in the weekly production of a regular meeting, if you find problems in time to do Well adjustments to ensure the orderly production. Upon completion of the node tasks simultaneously, and strictly control product quality, earnestly HWDP Hardbanding heat affected zone and the public, magnetic particle inspection at the female threaded screw, for heavier pipe body ultrasonic testing in strict accordance with ZT-JT5 ∮1.5 equivalent standard of conduct required to ensure the accuracy of the product. For the next processing of large sample machines and equipment can not meet the demand, drilling jars manufacturers the branch dispatcher actively coordinating with the Brothers production.
Drill Collar branch with a high sense of responsibility to organize the various stages of production, combined with their own actual development plan targeted organizational measures, reasonable arrangements for production capacity, the focus on efforts to achieve guaranteed, there is a breakthrough on the difficulties in the weak link there make up, around the whole value chain system of lean management, lean management will penetrate into each step of production, to ensure the successful completion of production tasks this month.

Drill is an essential part of the drill drill collars manufacturers string, which is mainly used to transfer torque and transporting drilling fluid. Active drill pipe body and joints are connected together using welded method. In order to increase the strength of the joints, pipe welding ends body part is thick, thick form of internal upset, outside the thick, thick inside and outside the three.
     Narrowing the inner diameter of the pipe ends to increase the inner thickened wall thickness, which is consistent with the outer diameter of the drill pipe, the outer diameter of the joint is not too large, while the well rotary joint in contact with the borehole wall is small, wear are more small, but because the inner diameter of the thickened portion of smaller diameter than the tubular body, to increase the flow resistance of the drilling cycle.
     Inner diameter of the external upset drill pipe is the same, but the outside diameter of the tube ends of the increase, the outer diameter larger than the outer diameter of the tool joint drill with the size of the joint, increases when the well rotary joint on the wall contact friction, easy to wear; Since this is consistent with the inner diameter hole opener drilling of the drill pipe inner diameter, the cycle of drilling fluid flow with less resistance.
     Inner and outer thickened drill pipe, the inner diameter is reduced at both ends of the tubular body, the outer diameter is increased to increase the wall thickness of the ends of the tubular body. Drill this structure combines the advantages of these two structures the drill pipe.

(1) carefully organized team TUC, roller reamers drilling classes before and after work, organizing a good person, to arrange a good job,
Emphasize safety measures and precautions.
(2) arrange preparation wellhead tools (hydraulic tongs, B-type tongs and tail rope, lifting short section, rope, thread protectors, elevator, safety slips, wrench, hammer) Check the good guy wire and pneumatic door gourd.
(3) fixed the elevator pin inserted in the rings.
(4) The barrier clean up the ramp at the door, drill floor and clean up, easy to open space Teng Shuaixia drill display.
(5) Check the good anti-collision crane is flexible, and reliable.
(6) the driller to stop the winch inverted file I raise the height of a traveling block, and watched the beam traveling through the finger.
(7) derrick in racking operation, you must fasten your seat belt, seat belt buckle on one end of the railing pillars.
(8) derrick fixed racking be carefully checked, check the pocket rope length, thickness is appropriate, "horse tail" is too long.
(9) derrick elevator opens the shutter, see drill collar slowly fed into the elevator, buttoned Elevators, and try to pull twice, drawing twice determine confirm elevator has been fastened, palm upward from the car signal, drilling rig off the use of swinging derrick will open pocket Rope slack, watched swim under the car means the beam back only safe place.
(10) drill rig operating station personnel must wear a helmet, standing in a safe place inside and outside the fitter with driller is stationary drill hall into the rat hole, 40-50 cm on card security slips under the drill collar section the security firm kava. When the B-type shackle tongs, tongs after tension, wellhead personnel to avoid the danger zone, coil tubing drilling rig lifting derrick observe whether there is a short section upside down phenomenon. When fastened, hydraulic cathead shackle (rejection before drilling, hydraulic Assets Division is responsible for the owl to the well site). Then spin the rope shackle, after deduction emptied, connect enhance short section, and closely linked to double clamp (B type tongs), according to the weight of the drill collar, select Security load more than 4 in only six times wire rope, set on a short section of drill collar lift, hoist or hook with a pneumatic drill collars will mention only drill floor, wearing protective wire, with a stretched rope collars stretch ramp door stop feeding grounds only rig and field staff back only safe position. Workers remove a short section of the site upgrade to a predetermined position of drill collars rolled into neat row.

LWD technology is the key signal transmission, roller reamers drilling it is currently widely used drilling fluid pressure pulse transmission, which is currently LWD tools commonly used method, which is to convert the measured parameters into the drilling fluid pressure pulse, with the drilling fluid circulation transferred to the ground. Its principle is shown briefly shown after the measured parameters by digitally encoded into high ("1") and low ("0"), the electrical signal, which controls the drilling fluid pulse generator mushroom head, when encoded as " 1 ", the shift mushroom head, so that drilling fluid flowing through the conical opening resistance increases, resulting in additional pressure. When encoded as "0", mushroom head down back in place, the pressure to normal. This is a positive pulse transmission system. There are similar negative pulse transmission systems, continuous-wave transmission system. Advantages drilling fluid pressure pulse propagation is economical, convenient, the disadvantage is the data transfer rate (the number of bits transmitted per second) is low. In recent years, in order to increase the transmission rate again try electromagnetic transmission technology, it is the LWD tools on the non-magnetic drill collar, between the non-magnetic drill collars and the upper pipe, there is a short section of insulation in order to contain low-frequency electromagnetic wave propagation information measured Mukai week the formation. On the ground, as a voltage difference between the rig and the ground electrode is detected. Early electromagnetic wave transmission because the signal attenuation, transmission distance is short and the high cost of commercial failure, due to technological drilling jars manufacturers improvements in recent years has begun to enter the market, the advantage is the transmission rate is not affected by fluid performance. In addition, underground storage, all data stored in underground storage, to be recovered from drilling data. The advantage is a low cost, reliable data storage. The disadvantage is that the ground can not get real-time data needed to guide drilling. For large amounts of data LWD, such as imaging logging while drilling, usually using real-time transmission and underground storage combination of approaches, key hole section using real-time transmission, while the other section with underground storage wells.

In the oil and gas exploration, development,Hydraulic Drilling jars  drilling must be carried out after logging in order to understand the situation hydrocarbon formation. However, access is always after the completion of drilling, the instrument cable into the well to measure, however, in some cases, as well gradient exceeds 65 degrees in highly deviated wells or horizontal well logging data, with Cable is difficult to put down the instrument; In addition, the wall is not good prone to collapse or blockage also difficult to obtain logs. Due to the drilling process to use drilling fluid circulation, with a broken drill cuttings, drilling fluid filtrate invasion always formation. Therefore, drilled again after logging various parameters formation just drilled strata and different. So people think that if the logging tool on the drill bit, let the drill bit long on the "eyes", while you get a variety of information while drilling formation, which is the LWD. Not only the well for any situation, especially horizontal wells may be logging, and drilling parameters and formation parameters using the measured time to adjust drill track, so that the direction of drilling along the target horizon. Since logging while drilling formation parameters obtained are just drilled formation parameters, it is closest to the original state formation, for the formation of complex oil and gas more favorable evaluation than wireline.Intelligent Drilling Robot  LWD tools on the drill collar, in addition to measuring the resistivity, sonic, neutron porosity, density and other conventional logging and some imaging logging, but also measuring WOB, torque, speed, annulus pressure drilling parameters. Since the drill bit during drilling in harsh environments, high temperatures, pressure is great, intense vibration, therefore, LWD instrument reliability is still the most important issue is the business.

Generally 38 ~ 53mm, the drill pipe wall roller reamers drilling thickness is equivalent to 4 to 6 times), has a large gravity and stiffness.
Drill collar during drilling act primarily in the following areas
(1) is applied to the drill bit pressure;
(2) to ensure Hydraulic Drilling jars the necessary strength under conditions of compression;
(3) to reduce the vibration of the drill bit, swing and bounce, so that the drill steady work;
(4) The control deviation.

Dalian Steel for the first time trial of the French drill collars manufacturers Vallourec Mannesmann sulfur 4145H · drill collar steel to succeed, and in January successfully sent to the user. Vallourec is ITC's newly developed client, the trial is successful, not only of great significance to Dalian Steel in the drill collar steel field development, but also for the ITC companies to open foreign markets related industries has taken a solid step forward.
Production difficulties in the steel is quenched, it requires both surface hardness, but also requires mechanical properties. In Dalian Steel and Steel Institute staff systematically analyze and plan, to existing quenching process to make adjustments so that the surface hardness and mechanical properties of the product meet customer requirements. casing and tubing coupling Vallourec company's technical staff to Dalian production base for the current month warehousing 4145H acceptance, respectively dimensions, flatness, hardness testing and other by-branch inspection, all test items are one-time inspection. This batch of customers satisfied with the test results of steel, and expressed willingness to cooperate in the long-term future.

AISI4137, AISI4145H is a high strength,casing and tubing couplings  high stiffness, torsional wear special alloy steel, mainly used in manufacturing 1000-3000 m depth underground oil drill collars, need to have to withstand all kinds of rock drilling friction conditions, a variety of stress its effect on operations and other harsh environments, and oil exploration in a larger amount of mining equipment, high-tech high value-added products, with broad market prospects.
To meet the drill collar steel high purity, high strength and toughness, good hardenability other performance requirements, steel plant from the process discussed in the various departments, production preparation, control scheme, annealing details and other aspects of well prepared. Technical managers trial production tracking, convergence and process control process quality control from the strict control of production organization Downhole Drilling Stabilizers to ensure that the series of steel-time successful trial.
Successful trial of this drill collar steel for the subsequent development of high value-added products has accumulated valuable experience, but also created the conditions for further broadening of sophisticated products market space, enhance the competitiveness of enterprises.

To meet technical requirements,hole opener drilling  to ensure smooth delivery of the product according to the contract period, collars branch accurate to determine the time each process node, and strict checking of the production node completion last week in the weekly production of a regular meeting, if you find problems in time to do well adjustments to ensure the orderly production. Upon completion of the node tasks simultaneously, strict quality control, earnestly HWDP Hardbanding heat affected zone and the public, magnetic particle inspection at the female threaded screw, to increase the pipe body ultrasonic testing in strict accordance with ZT-JT5 ∮1.5 equivalent standard requirements, ensuring the accuracy of product requirements. roller reamers manufacturers For the next processing of large sample machines and equipment can not meet the demand, the branch dispatcher actively coordinating with the Brothers production.