Heavy pulling and jarring shall be carried out using the top drive/ kelly on the string. On those rare occasions where this is not possible, the elevator latch shall be secured by means of a rope or chain. Remove the kelly spinner (if possible) before any jarring with the kelly is done, to avoid damage. … Jarring precautions

In case of lost Sidewall Sample Bullets, the following guidelines should be considered … If bullets are lost in the hole, run in with a rockbit (without nozzles) and junk sub, and rotate and circulate along the sections where the bullets were lost in an attempt to dislodge them from the wall of the hole.  … Lost Sidewall Sample Bullets

Conditions for a successful back-off: a) The string shot strength should be sufficient to back-off the pipe without causing damage to the pipe or the connection. The size of the shot should be advised by the Logging Contractor, and depends upon the depth of the back-off attempt, and whether the back-off is in the drill … Back-Off Procedures

In many drilling operations, the drill string is stuck while pulling out after first having experienced tight hole, swabbing and overpulls. This indicates the following shortcomings: Pulling out has continued for too long without remedial action. Drilling personnel have been allowed to struggle on their own without supervision or advice. Deterioration of the hole or … Pipe Sticking

The following guidelines should be considered to to avoid hole related problems …. 1. In 12 1/4″ hole, do not use 9 1/2″ drill collars. Reduce the number of drill collars by replacing them with HWDP if possible. 2. When reaming long intervals, use the minimum practical number of drill collars, (see (1) above concerning … How to avoid Hole Related Problems

If any tight hole is experienced when drilling with water the followint actions should be taken to prevent stuck pipe: – With kelly: Immediately pull the string back to above the tight spot (after having spotted a viscous slug) and ream the complete interval until no more overpull is experienced. – With top drive: Backream … Overpulls/ Stuck Pipe In Surface Hole

Baryte plugs to cure losses.Drilling 12 1/4″ hole through a fault at 13,700 ft. Thereafter, gas levels continued to increase (80%). Despite weighing up the mudf, high gas levels were measured. Two gasblok cement plugs were set across / above the fault, but were unsuccessful (80% gas levels monitored after setting the plugs). Consequently, it … Baryte plugs to cure losses

A. Backing off stuck pipe – Preliminary remarks: a. The neutral weight is calculated as the weight in air of the string above the stuck point. b. In order to avoid unintentional b/o (back-off), the maximum M/U torque should be applied before turning to the left. c. Determine maximum overpull to be applied to the … Backing-off procedure with top drive

Softwares are used to produce Drag charts on which is shown the measured and predicted weights vs. depth. The purpose is to provide the crew with the expected torque and drag during the drilling of each successive section of the well. This chart enables the driller to see at a glance what the torque and … Use of Drag charts for hole cleaning – WellPlan