workover rig blocks supplier

Welcome to Pickett Oilfield’s traveling blocks & hooks web page. Our company has been in the oil & gas drilling equipment industry for over 38 years, supplying new and used traveling blocks and traveling equipment to customers in practically every producing region in the world. We are here to serve all your drilling equipment needs – if you don’t see it on this site, just give us a call or email. We can get it, if you need it!

Pickett Oilfield, LLC offers prospective buyers and extensive selection of quality new and used oil & gas drilling equipment, including traveling blocks & hooks to choose from at competitive prices. Browse our inventory of traveling blocks and traveling equipment for sale at competitive rates.

Manufacturer of standard & mobile rigs & carriers for oilfield applications. Includes well servicing from 14,000 ft. to 22,000 ft., workovers from 10,000 ft. to 16,000 ft. & drilling from 6000 ft. to 10,000 ft. Specifications include brakes range from 28 in. dia. x 8 in. wide to 42 in. dia. x 12 in. wide, barrels from 12 3/4 in. x 38 in. to 18 in. x 43 in., chains from 1 1/4 in. to 1 3/4 in., clutches of 24 in. with single & 2 plate air friction outboards, shafts of 5 in. dia. to 6 1/2 in. dia. & gross weights from 63,200 lbs. to 115,000 lbs. Also includes forged steel, demountable options, mufflers with spark arrestors, dry type air cleaners, transmissions with torque converters, water splash brake cooling & up to 6 axles.

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Inserting and pulling up pipe tubing from oil wells is a precise and challenging job that not every rig is up for. That’s why you need a mobile workover rig from Dragon to get it done right every time. Our workover rigs are state-of-the-art and ready to tackle even the harshest conditions. A workover rig is perfect for site preparation while a standard mobile oil rig can handle a variety of piping tasks. Need workover rig parts, or service on another mobile rig? Dragon has that covered with our parts selection, too. View all of our workover rigs and other drilling rigs today.

Split Blocks are customized for service rig applications. TSM designs, manufactures and monograms split blocks as per API 8C and PSL-1 or 2 per client request. Our Split Blocks maximize mast headroom, which can allow a Top Drive to be installed in compact masts.

Product&Reapir: Crown block(TC225 TC250 TC315 TC450 TC585), Travelling block(YC225 YC250 YC315 YC350 YC450 YC450S YC585), Hook(DG225 DG250 DG315 DG350 DG450 DG585 DG675), Rotary table(ZP175 ZP205 ZP275 ZP375 ZP975AS ZP495), Swivel(SL225 SL250 SL450 SL585), Drawworks(JC20 JC30 JC40 JC50 JC70B JC90DB), Mud pump (F-500 F-800 F-1000 F-1300 F-1600 F-1600HL F-2200 F-2200HL 3NB500C,3NB1000C 3NB1300C 3NB1600 SL3NB-1000 SL3NB-1300A SL3NB-1600A),BOP(FH,FZ,Cameron,Shaffer), Control System for Surface Mounted BOP Stacks(FKQ,FKDQ),Disc brake (PS,PSZ, DBS), Bladder accumulator (NXQ), Drilling rig(ZJ40/2250DZ ZJ50/3150DZ ZJ70/4500DZ ZJ90/6750DZ), Workover rig (XJ40,XJ60, XJ80,XJ100,XJ12,ZJ15,ZJ20,ZJ3,XJ350, XJ450, XJ550,XJ650,XJ750), BPM Top drive((DQ120BSC, DQ90BSD, DQ90BSC, DQ80BSC, DQ70BSD, DQ70BSE, DQ70BSC, DQ50BC, DQ40BC, DQ40BSG, DQ40BCQ, DQ40YR, DQ30Y) Make: Bomco, Lanzhou LS,LSPE, SJ Petro, RG Petro, Sichuan Honghua, CPTDC, Beijing BPM, Shanghai Shenkai, Kingdream, CCDC, SJS Serva, DFXK, LS-NOV, Beijing PSK, Gold basin, Renqiu Boke,Guangdong Dongsu.(Guangshi), XBSY.,Tiehu, Rongsheng (HBRS), TSC. Replacements:Mission magnum/Halco centrifugal pump, Cameron FC gate valve,Cameron R check valve, Demco mud valveE( 3K&5K ), Demco butterfly valve,BJ varco handling tools (SDXL, SDML, SDS,DCS,SSC,SSD,YT, HYC, LYT, MP,MYT, MG, RGG, HGG, MGG, TA, SJ), MI SWACO / Mongoose / Derrick / /Brandt / King cobra shale shaker screen (FLC2000,FLC503,Derrick 626), M/D & OTECO Gauge(Type F,Type D,Model 6,Model 7,Model 8), Twin disc,WPT, Eaton clutch & friction disc, National (10-P-130,12-P-160 ,14-P-220 ,8-P-80 ,9-P-100), Gardner denver (PZ-7,PZ-8,PZ-9,PZ-10,PZ-11), EMSCO FB1600.International Brand: Moog, CCS, ATOS, Rexroth, Eaton, Flowrox, Italvibras, Martin, Norgren, Parker, Siemens, Vickers, 3M.Standard:API Spec 4F, API Spec 6A,API Spec 6D,API Spec 600, API Spec 7K, API Spec 8A, API Spec 8C,API Spec 16A, API Spec 16C, API Spec 16D

This is a family owned company operated by people with over 40 years in the oilfield equipment industry. We have over 100,000 square foot of warehouse and offer a wide selection of well service, work over, and drilling rig tools and parts to accommodate the industry"s many varied needs.

We can create complete rig tool packages, as well as provide equipment locating. We provide our customers with additional expertise to aid in choosing the best products for their application. Our team has skill, experience and knowledge in everything from operating the brake handle to operating oil and gas wells. We understand The tool and supply needs of the petroleum industry.

We are a parts supplier for all major brands of well servicing rigs and equipment. We are an authorized distributor of quality oilfield brands such as Crosby, WPT, Kobelt, Parker and Oil Country, to name a few. With a full machine shop and fabrication capabilities, we can make hard to find parts that keep older equipment in service.

National Oilwell Varco designs and produces the highest quality and field proven traveling blocks from proven brand names, including Ideco, Dreco, and National.

Dreco Traveling Blocks include the largest sizes used in the drilling industry. Dreco API sheaves, with hardened grooves, are independently mounted on tapered roller bearings. Additionally, Dreco traveling blocks can be furnished unitized with a hook to provide a short, compact design.

National Type H traveling blocks are offered with five sheave sizes and five load ratings. The sheaves are independently mounted on double-row tapered bearings which minimize friction. Flame-hardened rope grooves in the sheaves are machined in accordance with API recommendations and each sheave is a one-piece steel casting assuring longer sheave life and elimination of rim cracks.

dhparts.com provide drilling equipment including all types of driving drilling rigs and components (1000HP up to 3000 HP), relating to 1,000-7,000 meters mechanical driving, DC driving, frequency conversion and compound driving. Other models of drilling rigs are as follow :

The equipment and components include Drilling Rigs Crown Block Line Lock Sub Structure VFD House Mud Circulating System Derrick Lift Group Generator House Draw Works Line Drawing/Casting Machine,Sub Driller＇s House,Tool HouseDerrick Traveling Block Driller＇s Contrlo Room Normal sized(traveling beam)Pumping Unit Rotary Table F Series Mud Pump Oil Production Machinery Equipment Wellhead Tools Oil field piping system Truck-Mounted Drilling Rig & Workover rig which fromBomco,Baoji oilfield,Lanzhou LS,NANYANG RG PETRO,SICHUAN HONGHUA,SJ PETRO,SHANGHAI SHENKAI,BEIJING BPMF,PSK,GOLD BASIN,DONGSU,RENQIU BOKE,and products meet API 6A,16A,16C,16D,7K,8C,7-1,4F,6D etc.

Over the past years, OMV E&P has experienced several incidents in its drilling and workover activities related to dropped blocks. The root causes are all related to improper maintenance and wrong use of the hoisting system related to insufficient crew competence. OMV is determined to reduce the reoccurrence of such high-potential incidents to ALARP.

Mechanical drive systems are rarely found on rigs contracted by OMV and are therefore not discussed here in detail. On the other hand, DC-driven units are very common. Because power on rigs is now typically generated via synchronous generators, these units require SCR cubicles to work. These cubicles are mostly set up to deliver power in one direction only, from the AC side to the DC side. Therefore, an auxiliary brake is required.

AC drives are a modern development but still do not represent the majority of units in the field. They can come in two ways: with or without the possibility of feeding back energy into the rig net. The first option does not require a separate auxiliary brake as these units can be switched into generator mode, thus reducing the block speed.

Parkersburg (or hydrodynamic) brakes develop braking force by shearing water molecules though small gaps between the stationary and the rotating part, thus reducing speed. As the shear effect is dependent on the relative speed between these two parts, this type of brake yields very low braking forces at low speeds and can therefore not bring the load to a complete stop. On the other side, it efficiently transforms the involved potential and kinetic energies into heat. Parkersburg brakes are most commonly found on workover rigs and rarely on smaller drilling rigs.

In another case, a misunderstanding led to a dropped block. While tripping in, the Elmagco brake experienced a bearing failure. Consequently, operations were stopped, and the Elmagco was removed for repair. As the arrival of the replacement Elmagco was scheduled for one week later, OMV and its rig contractor jointly searched for a way to continue operations. After discussions and agreement in the field, it was decided to continue with tripping in using the rig’s DC motors in generator mode. However, the rig was not configured to allow for a backflow of electrical energy from the DC to the AC side. This is possible to achieve but is basically never utilized in oilfield applications; thus, the drawworks motor could not work in braking mode and take out energy from the descending hoisting system.

When the driller realized that the motors were not limiting the lowering velocity, it was already of a magnitude that his attempt to stop the block with the disk brake failed, resulting in the block hitting the rig floor before the brake could reduce the drum speed to zero. Missing management of change was a predominant factor for this incident.

Programmable logic controllers (PLC) are used on modern rigs to partly automate work processes, such as the lowering of the block and brake action. To do so, the PLC receives a series of input parameters (e.g., block position, drum rpms, hookload) and uses them to produce commands for different motors, pumps, etc. The clear aim for such controllers is to enhance safety by limiting block speeds, anti-collision, etc. For this block incident, however, a program code deficiency led the PLC to do exactly the opposite. Although the programming was extensively tested during rig commissioning, one piece of coding remained: In the case of a short circuit on one of the PLC input sensors (a temperature sensor, in this case) when the block is in a very low position (below the floor saver limit), the PLC would give an output signal to the drawworks motors, ordering them to move full speed in a downward direction. As this command put full power on the motors, the slightly worn disk brakes were not able to hold against the motors, and the block slowly descended into the workfloor. Insufficient quality control of the PLC program, along with insufficient maintenance, was a major factor for this incident.

The measures in regard to equipment are straightforward and well known in the industry: use of adequate equipment from notable manufacturers, rigorous maintenance following all OEM and international standards requirements. Repairs are to be conducted in accordance with OEM instructions and by certified personnel. New safety-related equipment shall undergo a commissioning test.

The example of the defective PLC coding is a good example illustrating that there will always be residual risk associated with equipment: Even with rigorous commissioning process, QA/QC controls by the manufacturers and implementation of safety barriers, a chance for failure remains. It is important to keep that in mind and to reach for ALARP.

Crew competence is – even on the most modern and heavily automated rigs – of paramount importance. A driller with many years of experience on rigs and a certain feel for “his” rig is able to determine changes to the brake systems just by sounds and physical feedback. A knowledgeable mechanic will not only conduct regular equipment checks but will also be able to see and measure indications for degradation or misuse of equipment.

Contractors must have a detailed understanding of training requirements for their rig crews and the individual positions. Some equipment require special training in regard to use and maintenance, and that should be reflected in a training matrix. Additionally, it is important to understand the value of experience of key personnel and avoid overly rapid development of personnel or frequent crew changes.

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